Patent Publication Number: US-2023150087-A1

Title: Polishing fixing device and polishing apparatus

Description:
TECHNICAL FIELD 
     The present disclosure relates to the field of polishing workpieces, in particular to a polishing fixing device and a polishing apparatus using the same. 
     BACKGROUND 
     With the rapid development of 3C products, high standards are required for the appearance of workpieces. For example, after the processing steps of a workpiece are completed, surfaces of the workpiece need to be polished to achieve a mirror finish. The current polishing method for the workpiece is carried out by rotating or vibrating a polishing head relative to the workpiece along the surfaces of the workpiece for polishing operation. However, during the polishing process for the workpiece, the force between the polishing head and the workpiece cannot be adjusted in real time, it might result in uneven polishing effects on the surfaces of the workpiece by the polishing head, or even poor polishing. Such a polishing method may greatly reduce polishing quality and affect production efficiency of the workpiece. 
     Therefore, an improved polishing apparatus is desired for achieving a polishing effect with a high quality. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    illustrates an isometric view of at least one embodiment of a polishing apparatus. 
         FIG.  2    illustrates an exploded view of a polishing fixing device shown in  FIG.  1   . 
         FIG.  3    illustrates a schematic view showing a state of the polishing apparatus polishing a 3 dimensional (3D) surface of the workpiece. 
         FIG.  4    illustrates a schematic view showing another state of the polishing apparatus polishing a side of the workpiece. 
         FIG.  5    illustrates a schematic view of another state of the polishing apparatus polishing a top surface of the workpiece. 
         FIG.  6    illustrates a schematic view of a sensor and a connecting plate of the fixing device shown in  FIG.  2   . 
         FIG.  7    illustrates an exploded view of a movement compensation assembly of the fixing device shown in  FIG.  2   . 
         FIG.  8    illustrates an exploded view of a first moving assembly and a second moving assembly of the fixing device shown in  FIG.  2   . 
         FIG.  9    illustrates an exploded view of a polishing device shown in  FIG.  1   . 
         FIG.  10    illustrates a schematic view of at least one embodiment of another polishing apparatus. 
         FIG.  11    illustrates an exploded view of the polishing apparatus shown in  FIG.  10   . 
         FIG.  12    illustrates an exploded view of a rotating device of the apparatus shown in  FIG.  11   . 
         FIG.  13    illustrates an exploded view of a polishing moving mechanism of the apparatus shown in  FIG.  11   . 
     
    
    
     DETAILED DESCRIPTION 
     The embodiments of the disclosure are described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar labels throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the disclosure, but cannot be understood as restrictions on the disclosure. 
     In the description of the disclosure, it should be understood that the terms “first” and “second” are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as “first” and “second” can explicitly or implicitly include one or more relevant features. In the description of the disclosure, it should be noted that “multiple” means two or more, unless otherwise specified. 
     The embodiments of the present disclosure are described in detail below in combination with the accompanying drawings. 
     Referring to  FIG.  1   , a polishing apparatus  100  is used to polish the workpiece  200 . The workpiece  200  can be one part of products such as a frame or a back shell of mobile phone, but not limited to this. The polishing apparatus  100  includes a polishing device  10 , a polishing fixing device  20 , and a controller (not shown in the figure). 
     The polishing device  10  includes a polishing assembly  11 , and the polishing assembly  11  is used to polish the workpiece  200 . 
     Referring to  FIG.  2   , the polishing fixing device  20  may include a rotating mechanism  21 , a sensor  22 , a movement compensation assembly  23 , a first moving assembly  24 , and a second moving assembly  25 . The rotating mechanism  21  is used to fix and drive the workpiece  200  to rotate relative to the polishing assembly  11 , so that the workpiece  200  can be moved relative to the polishing assembly  11 , and the workpiece  200  is polished by the polishing assembly  11 . The sensor  22  is connected to the rotating mechanism  21 . The sensor  22  is used to sense the force applied to the workpiece  200  during polishing. This force can be understood as the pressure between the polishing assembly  11  and the workpiece  200  when the polishing assembly  11  is polishing the workpiece  200 . If the pressure is too much, the polishing assembly  11  will over polish the workpiece  200 . On the contrary, if the pressure is too small, the workpiece  200  will be under polished by the polishing assembly  11 . The above two conditions will affect the polishing yield of the workpiece  200 . The movement compensation assembly  23  is connected to the rotating mechanism  21 . The movement compensation assembly  23  is used to drive the rotating mechanism  21  to move relative to the polishing assembly  11  so that the force between the polishing assembly  11  and the workpiece  200  remains in a preset range. The first moving assembly  24  is connected to the movement compensation assembly  23 , the first moving assembly  24  is used to drive the movement compensation assembly  23  and the rotating mechanism  21  to move along a first direction. The second moving assembly  25  is connected to the first moving assembly  24 , the second moving assembly  25  is used to drive the first moving assembly  24  to move along a second direction different from the first direction. 
     For the convenience of explanation, as shown in  FIG.  1   , the first direction is defined as the X-axis direction, and the second direction is defined as the Y-axis direction. In the embodiment, the first direction is perpendicular to the second direction. 
     In other embodiments, the first direction and the second direction may be other than vertical, and the included angle between the first direction and the second direction may be 30°, 45°, 60°, 75°, etc. 
     In the embodiment, a controller is coupled to the polishing device  10  and the polishing fixing device  20 . It can also be understood that the controller can also be coupled to the rotating mechanism  21 , the sensor  22 , the movement compensation assembly  23 , the first moving assembly  24 , and the second moving assembly  25 . The controller is used to control the carrying member  14  to rotate along the central axis to adjust the polishing angle of the polishing assembly  11  relative to the workpiece  200 . The central axis of the carrying member  14  is perpendicular to the rotation axis of the polishing assembly  11 . The controller is used to control at least one of the polishing fixing device  20  to drive the workpiece  200  to rotate relative to the polishing assembly  11 , move along the first direction, move along the second direction, and apply compensation in movement, so as to make the workpiece  200  move relative to the polishing assembly  11 . It can also be understood that the controller is used to control at least one of the rotating mechanism  21  to drive the workpiece  200  to rotate relative to the polishing assembly  11 , the first moving assembly  24  drives the workpiece  200  to move in the first direction, the second moving assembly  25  drives the workpiece  200  to move in the second direction, and the movement compensation assembly  23  drives the workpiece  200  to move in the second direction for compensation. The polishing assembly  11  can rotate along its axis to polish the workpiece  200 , the movement of the polishing assembly  11  and the rotation of the polishing angle of the workpiece  200  are driven by the carrying member  14 . 
     The implementation process of the polishing apparatus  100  can be as follows: the workpiece  200  is fixed to the rotating mechanism  21 , the controller controls the first moving assembly  24  and the second moving assembly  25  to drive the workpiece  200  to make a movement similar to the shape of the workpiece itself, so as to make the workpiece  200  contact with the polishing assembly  11 , the controller controls the polishing assembly  11  to rotate to a preset angle, and the polishing assembly  11  can polish the workpiece  200  at a suitable polishing angle. Next, the controller controls the first moving assembly  24 , the second moving assembly  25  and the rotating mechanism  21  to cooperate with each other to make the workpiece  200  perform profiling movements relative to the polishing assembly  11 , until the workpiece  200  is satisfactorily polished. When the workpiece  200  moves relative to the polishing assembly  11 , the sensor  22  senses the force applied to the workpiece  200  during polishing and transmits the force to the controller, and the controller determines whether the force is too large or too small. When the controller determines that the force is too large or too small, the controller further controls the movement compensation assembly  23  to drive the rotating mechanism  21  to move relative to the polishing assembly  11 , and the force between the workpiece  200  and the polishing assembly  11  remains the preset range. For example, when the controller determines that the force is too large, the conflict between the workpiece  200  and the polishing assembly  11  is too tight, and the controller controls the movement compensation assembly  23  to drive the workpiece  200  to move away from the polishing assembly  11 , and the force between the workpiece  200  and the polishing assembly  11  remains the preset range. 
     Referring to  FIG.  3   , the polishing apparatus  100  polishes the 3D surfaces of the workpiece  200 , the 3D surfaces of the workpiece  200  can also be understood as an arced surface of the workpiece  200 . The polishing assembly  11  of the polishing apparatus  100  rotates to a preset angle α to polish the 3D surface of the workpiece  200 . When the polishing assembly  11  polishes the workpiece  200 , the force sensed by the sensor  22  on the workpiece  200  is value F, and the force F can be composed of the horizontal force Fx and the vertical force Fz, Fx=Fcosα, Fz=Fsinα. The horizontal force on the workpiece  200  is Fx, and the vertical force is Fz. For example, when the horizontal force between the workpiece  200  and the polishing assembly  11  is Fx′, and the vertical force is Fz′, it means that the force between the workpiece  200  and the polishing assembly  11  remains the preset range. When Fx is greater than or less than Fx′ and Fz is greater than or less than Fz′, it means that the force between the workpiece  200  and the polishing assembly  11  is outside the preset range, and compensation needs to be applied by the polishing apparatus  100 . For example, when Fx&gt;Fx′, it means that the horizontal force between the workpiece  200  and the polishing assembly  11  is too large. The controller controls the movement compensation assembly  23  to drive the workpiece  200  away from the polishing assembly  11  in the horizontal direction, so that Fx=Fx′. When Fx&lt;Fx′, it means that the horizontal force between the workpiece  200  and the polishing assembly  11  is insufficient. The controller controls the movement compensation assembly  23  to drive the workpiece  200  close to the polishing assembly  11  in the horizontal direction, so that Fx=Fx′. When Fz&gt;Fz′, it means that the vertical force between the workpiece  200  and the polishing assembly  11  is too large, and the controller controls the movement compensation assembly  23  to drive the workpiece  200  away from the polishing assembly  11  in the horizontal direction. In other embodiments, the controller can also control the polishing device  10  to make the polishing assembly  11  away from the workpiece  200  in the vertical direction, so that Fz=Fz′. When Fz&lt;Fz′, it means that the force in the vertical direction between the workpiece  200  and the polishing assembly  11  is insufficient. The controller controls the movement compensation assembly  23  to drive the workpiece  200  closer to the polishing assembly  11  in the horizontal direction. In other embodiments, the controller controls the polishing device  10  to drive the polishing assembly  11  closer to the workpiece  200  in the vertical direction, so that Fz=Fz′. Therefore, the force between the polishing assembly  11  and the workpiece  200  can be automatically adjusted. The polishing assembly  11  uniformly polishes the workpiece  200 . 
     Referring to  FIG.  4   , the polishing apparatus  100  polishes the side surface of the workpiece  200 . The polishing assembly  11  is perpendicular to the side surface of the workpiece  200  to polish the side surface of the workpiece  200 . When the polishing assembly  11  polishes the workpiece  200 , the sensor  22  senses that the force on the workpiece  200  is value F, the force F is composed of the force Fx in the horizontal direction, there being no force between the workpiece  200  and the polishing assembly  11  in the vertical direction. For example, when the force range in the horizontal direction between the workpiece  200  and the polishing assembly  11  is Fx′, it means that the force between the workpiece  200  and the polishing assembly  11  remains the preset range. When Fx is greater than or less than Fx′, it means that the force between the workpiece  200  and the polishing assembly  11  is outside the preset range. For example, when Fx&gt;Fx′, it means that the force in the horizontal direction between the workpiece  200  and the polishing assembly  11  is too large. The controller controls the movement compensation assembly  23  to drive the workpiece  200  away from the polishing assembly  11  in the horizontal direction, so that Fx=Fx′. When Fx&lt;Fx′, it means that the force in the horizontal direction between the workpiece  200  and the polishing assembly  11  is not enough. The controller controls the movement compensation assembly  23  to drive the workpiece  200  to approach the polishing assembly  11  in the horizontal direction, so that Fx=Fx′. Therefore, the force between the polishing assembly  11  and the workpiece  200  can be automatically adjusted. The polishing assembly  11  uniformly polishes the workpiece  200 . 
     Referring to  FIG.  5   , the polishing apparatus  100  polishes the top surface of the workpiece  200 . The polishing assembly  11  is perpendicular to the top surface of the workpiece  200  to polish the top surface of the workpiece  200 . When the polishing assembly  11  polishes the workpiece  200 , the sensor  22  senses that the force on the workpiece  200  is value F, the force F is composed of the vertical force Fz, there being no force between the workpiece  200  and the polishing assembly  11  in the horizontal direction. For example, when the force in the vertical direction between the workpiece  200  and the polishing assembly  11  is Fz′, it means that the force between the workpiece  200  and the polishing assembly  11  remains the preset range. When Fz is greater than or less than Fz′, it means that the force between the workpiece  200  and the polishing assembly  11  is outside the preset range, and the polishing apparatus  100  needs to be compensated. For example, when Fz&gt;Fz′, it means that the force in the vertical direction between the workpiece  200  and the polishing assembly  11  is too large, and the controller controls the movement compensation assembly  23  to drive the workpiece  200  away from the polishing assembly  11  in the vertical direction, or the controller controls the polishing device  10  to drive the polishing assembly  11  away from the workpiece  200  in the vertical direction, so that Fz=Fz′. When Fz&lt;Fz′, it means that the force in the vertical direction between the workpiece  200  and the polishing assembly  11  is not enough, and the controller controls the movement compensation assembly  23  to drive the workpiece  200  closer to the polishing assembly  11  in the vertical direction, or the controller controls the polishing device  10  to drive the polishing assembly  11  to closer the workpiece  200  in the vertical direction, so that Fz=Fz′. Therefore, the force between the polishing assembly  11  and the workpiece  200  is automatically adjusted. The polishing assembly  11  uniformly polishes the workpiece  200 . 
     The embodiment provides a polishing apparatus  100 , the workpiece  200  is polished by the polishing assembly  11  in the polishing device  10 , and the sensor  22  in the polishing fixing device  20  senses the pressures exerted on the workpiece  200 , the controller controls the movement compensation assembly  23  according to the sensed force to drive the rotating mechanism  21  to move relative to the polishing assembly  11 , so that the force between the polishing assembly  11  and the workpiece  200  can be automatically adjusted, so that the force between the polishing assembly  11  and the workpiece  200  remains the preset range. The polishing assembly  11  can evenly polish the workpiece  200 , which is conducive to improving the polishing quality and production efficiency of the workpiece  200 . 
     In some embodiments, the controller can be a touch operation component. The touch operation component can include a processor, a memory, a display screen and other components. The processor is used to receive data, process data and send data. The memory is used to store data and instructions. The data and instructions can be read and executed by the processor. The display screen is used to display information, receive touch instructions, and send the touch instructions to the processor. 
     In other embodiments, the controller can also be a computer device, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices Discrete gate or transistor logic devices, discrete hardware components, etc. The controller is the control center of the polishing apparatus  100  and uses various interfaces and lines to connect various parts of the entire polishing apparatus  100 . 
     In some embodiments, the rotating mechanism  21  may include a fixing assembly  211  and a rotating assembly  212 . 
     The fixing assembly  211  is used to fix the workpiece  200 . The rotating assembly  212  is coupled with the controller. The rotating assembly  212  is located between the fixing assembly  211  and the movement compensation assembly  23  and is connected to the fixing assembly  211  and the movement compensation assembly  23 . The rotating assembly  212  is used to drive the fixing assembly  211  and the workpiece  200  to rotate. 
     For example, the fixing assembly  211  can be used to fix one end of the workpiece  200  to fit the workpiece  200 , and the fixing assembly  211  can be used to support the workpiece  200 . The rotating assembly  212  includes a rotating shaft  2121 , a coupling member  2122  and a rotating drive member  2123 . One end of the rotating shaft  2121  is connected to the fixing assembly  211 , and the fixing assembly  211  can rotate along the rotating shaft  2121 . The coupling member  2122  is connected to the other end of the rotating shaft  2121 . The rotating drive member  2123  is coupled to the controller and is connected to the coupling member  2122 . The rotating drive member  2123  is used to drive the coupling member  2122  to drive the rotating shaft  2121  to rotate. The rotating drive member  2123  can be a servo motor, and the coupling member  2122  allows transmission of the driving force of the rotating drive member  2123  in different directions. Therefore, the structure of the rotating mechanism  21  is compact and stable. 
     In some embodiment, the rotating mechanism  21  further includes a rotating base  2124 . The rotating base  2124  is substantially a short cylinder, and the diameter of the rotating base  2124  is larger than the diameter of the rotating shaft  2121 . One end of the rotating base  2124  is connected to the fixing assembly  211 , and the other end of the rotating base  2124  is connected to the rotating shaft  2121 . Therefore, the connection between the fixing assembly  211  and the rotating assembly  212  is simple and stable. It is understood that the rotating base  2124  may also be omitted. 
     In other embodiments, the rotating drive member  2123  is connected to the rotating shaft  2121 . 
     In other embodiments, one end of the fixing assembly  211  used to fix the workpiece  200  can also be a suction cup or a vacuum nozzle, the suction cup or the vacuum nozzle adsorbs the workpiece  200  through a negative pressure to prevent bumping, scratching, and crushing of the workpiece  200  when the fixing assembly  211  fixes the workpiece  200 . 
     Referring to  FIG.  6   , in some embodiments, the sensor  22  may include a sensing housing  221 , a sensing member  222 , a signal transmission member  223 , and a sealing member  224  arranged on the sensing housing  221 . The sensing housing  221  is circular and plate shaped. The sensing member  222  is used to sense the force applied to the workpiece  200  during polishing, and the sensing member  222  is located in the middle of the sensing housing  221 . The sealing member  224  surrounds the sensing member  222  and is arranged on the sensing housing  221 . The sealing member  224  can be a rubber ring or a silicone ring. The sealing member  224  seals and protects the sensing member  222  to prevent damage to the sensing member  222  due to contamination by a polishing liquid or dust. The signal transmission member  223  is connected to the sensing member  222  and protrudes out of the sensing housing  221  for coupling with the controller. The signal transmission member  223  is used to transmit the data output by the sensing member  222 . 
     The sensing housing  221  is located between the rotating mechanism  21  and the movement compensation assembly  23  and is connected to the rotating mechanism  21  and the movement compensation assembly  23 . The sensing member  222  is butted against the rotating mechanism  21  to sense the force experienced by the rotating mechanism  21 . 
     In other embodiments, the sensing housing  221  is located between the fixing assembly  211  and the rotating assembly  212 , and the sensing housing  221  is connected to the fixing assembly  211  and the rotating assembly  212 . The sensing member  222  is butted against the fixing assembly  211 . The movement compensation assembly  23  is connected to the rotating assembly  212 . 
     In some embodiments, the polishing fixing device  20  further includes a connecting plate  26 . The connecting plate  26  is in the form of a plate. The connecting plate  26  is located between the rotating mechanism  21  and the sensing housing  221 , and the connecting plate  26  is connected to the rotating mechanism  21  and the sensing housing  221 . The connecting plate  26  carries the rotating mechanism  21 , which is conducive to stress conduction and improves the induction accuracy of the inductor  22 , reducing the error. 
     In other embodiments, when the sensing housing  221  of the sensor  22  is located between the fixing assembly  211  and the rotating assembly  212 , the connecting plate  26  should be located between the fixing assembly  211  and the sensing housing  221  and connected to the fixing assembly  211  and the sensing housing  221 . 
     In some embodiments, the sensing member  222  projects out of the sealing member  224  towards the direction facing the connecting plate  26 , which can be understood as along the Z-axis direction, as shown in  FIG.  6   , the sensing member  222  is higher than the sealing member  224  to render the sensing member  222  slightly convex. The side of the connecting plate  26  facing the sensing housing  221  is provided with a butting portion  261 . When the connecting plate  26  is connected to the sensing housing  221 , the butting portion  261  is butted against the sensing member  222 . Therefore, the connecting plate  26  and the sensing member  222  are closely connected, which improves the sensing accuracy of the sensing member  222  and reduces the error. 
     In other embodiments, the sensing member  222  can protrude from the side of the sensing housing  221  facing the connecting plate  26 . Therefore, the sensing member  222  and the connecting plate  26  are closely connected, which improves the sensing accuracy of the sensing member  222  and reduces the error. 
     Referring to  FIG.  7   , in some embodiments, the movement compensation assembly  23  includes a housing  231 , a movement guide rail  232 , a movement transmission member  233 , a movement sliding plate  234 , and a movement driving member  235 . 
     The housing  231  is used to accommodate and carry the bearing movement guide rail movement guide rail  232 , the movement transmission member  233 , the movement sliding plate  234 , and the mobile transmission part movement driving member  235 . The housing  231  is connected to the first moving assembly  24 . The number of the movement guide rails  232  is two, and the two movement guide rails  232  are relatively arranged in the housing  231  and extend in the direction of movement compensation. In the embodiment, the direction of the movement compensation is the first direction, closer to or farther from the polishing assembly  11  along the X axis, so that the force between the polishing assembly  11  and the workpiece  200  remains the preset range. The movement transmission member  233  is rotatably arranged on the housing  231  and located between the two movement guide rails  232 . The movement transmission member  233  extends in the direction of motion compensation. The movement sliding plate  234  is plate shaped. One side of the movement sliding plate  234  is slidably connected to the movement transmission member  233  and the movement guide rail  232 . The other side of the movement sliding plate  234  is connected to the rotating mechanism  21  or the sensing housing  221 . The movement driving member  235  is coupled to the controller, the movement driving member  235  is arranged on the housing  231  and connected to the movement transmission member  233 , and the movement driving member  235  is used to drive the movement transmission member  233  to rotate, so that the movement sliding plate  234  moves along the extension direction of the movement guide rail  232 . 
     In some embodiment, the movement compensation assembly  23  may further include a sliding block  236  and a movement sliding member  237 . The number of the sliding blocks  236  is four, two of which are arranged on one movement guide rail  232 . The movement sliding member  237  is slidably arranged on the movement transmission member  233 , and the movement sliding member  237  moves relative to the movement transmission member  233  when the movement transmission member  233  rotates. One side of the movement sliding plate  234  is connected to the sliding block  236  and the movement sliding member  237  and moves along the extension direction of the movement guide rail  232  with the movement sliding member  237 . The movement transmission member  233  and the movement sliding member  237  can be a ball screw structure. The movement driving member  235  can be a servo motor. The movement transmission member  233  is rotatably connected to the housing  231  through a bearing. The number of the sliding blocks  236  can also be two, three, five, six or more. 
     In other embodiments, the movement compensation assembly  23  can be a cylinder mechanism moving linearly, the rotating mechanism  21  or the sensing housing  221  being connected to the output end of the cylinder mechanism. In this way, the movement compensation assembly  23  can still realize movement in compensation of the workpiece  200 . 
     Referring to  FIG.  8   , in some embodiments, the first moving assembly  24  may include a first housing  241 , a first guide rail  242 , a first transmission member  243 , a first sliding plate  244 , a first driving member  245 , a first sliding block  246 , a first sliding seat  247 , and a first buffering member  248 . 
     The first housing  241  is used to accommodate and carry the first guide rail  242 , the first transmission member  243 , the first sliding plate  244 , the first driving member  245 , the first sliding block  246 , the first sliding seat  247  and the first buffering member  248 , the first housing  241  is connected to the second moving assembly  25 . The number of the first guide rails  242  is two. The two first guide rails  242  are opposite to each other in the first housing  241  and extend along the first direction, the number of the first sliding blocks  246  is four, two of which are arranged on the first guide rail  242 . The first transmission member  243  is arranged in the first housing  241  between the two first guide rails  242 , and the first transmission member  243  extends along the first direction. The first sliding seat  247  is slidably arranged on the first transmission member  243 . The first driving member  245  is connected to one end of the first transmission member  243 . The first driving member  245  is used to drive the first transmission member  243  to rotate relative to the first sliding seat  247 , so that the first sliding seat  247  moves along the first transmission member  243 , and the first sliding seat  247  moves along the first direction. The first sliding plate  244  is plate shaped, and one side of the first sliding plate  244  is connected to the first sliding seat  247  and the first sliding block  246 . The first sliding plate  244  is driven by the first sliding seat  247  to move in the first direction. The other side of the first sliding plate  244  is connected to the housing  231  of the movement compensation assembly  23 , so that the movement compensation assembly  23  moves in the first direction when driven by the first sliding plate  244 . The number of the first buffering members  248  is two, respectively arranged on either side of the first sliding plate  244  along the first direction. The first buffering member  248  has elasticity, and the first buffering member  248  provides buffering when the first sliding plate  244  moves too far along the first direction. 
     In other embodiments, the first sliding plate  244  and the first buffering member  248  can be omitted. In this way, the first sliding seat  247  is directly connected to the housing  231 . 
     The first transmission member  243  and the first sliding seat  247  can be a ball screw structure, the first driving member  245  can be a servo motor. The first transmission member  243  is rotatably connected to the first housing  241  through the bearing structure. The first buffering member  248  may be an elastic member made of rubber material. The first buffering member  248  may also be a spring or other elastic component, and the number of first sliding blocks  246  may be two, three, five, six or more. 
     In other embodiments, the first moving assembly  24  can be a cylinder mechanism moving linearly, and the housing  231  is connected to the output end of the first moving assembly  24 . Therefore, the first moving assembly  24  can still achieve movement of the movement compensation assembly  23  in the first direction. 
     In some embodiments, the second moving assembly  25  may include a second housing  251 , a second guide rail  252 , a second transmission member  253 , a second sliding plate  254 , a second driving member  255 , a second sliding block  256 , a second sliding seat  257 , and a second buffering member  258 . 
     The second housing  251  is used to accommodate and carry the second guide rail  252 , the second transmission member  253 , the second sliding plate  254 , the second driving member  255 , the second sliding block  256 , the second sliding seat  257  and the second buffering member  258 . The second housing  251  can be the supporting structure of the polishing fixing device  20 . The number of the second guide rails  252  is two. The two second guide rails  252  are opposite to each other in the second housing  251  and extend along the second direction. The number of the second sliding blocks  256  is four, two of which are arranged on a second guide rail 2. The second transmission member  253  is arranged in the second housing  251  between two second guide rails  252 , and the second transmission member  253  extends in the second direction. The second sliding seat  257  is slidably arranged on the second transmission member  253 . The second driving member  255  is connected to one end of the second transmission member  253 . The second driving member  255  is used to drive the second transmission member  253  to rotate relative to the second sliding seat  257 , so that the second sliding seat  257  moves along the second transmission member  253 , and the second sliding seat  257  moves along the second direction. One side of the second sliding plate  254  is connected to the second sliding seat  257  and the second sliding block  256 . The second sliding plate  254  is driven by the second sliding seat  257  to move in the second direction. The other side of the second sliding plate  254  is connected to the first housing  241 , so that the first moving assembly  24  moves in the second direction when driven by the second sliding plate  254 . The number of the second buffering members  258  is two, respectively arranged on either side of the second sliding plate  254  along the second direction. The second buffering member  258  has elasticity, and the second buffering member  258  provides buffering when the second sliding plate  254  moves too far in the second direction. 
     In other embodiments, the second sliding plate  254  and the second buffering member  258  can be omitted. In this way, the second sliding seat  257  is connected to the first housing  241 . 
     The second transmission member  253  and the second sliding seat  257  can be a ball screw structure, and the second driving member  255  can be a servo motor, the second transmission member  253  is rotatably connected to the second housing  251  through a bearing structure, and the second buffering member  258  can be an elastic element made of rubber material. In other embodiments, the second buffering member  258  can also be a spring or other elastic component, and the number of the second sliding blocks  256  can also be two, three, five, six or more. 
     In other embodiments, the second moving assembly  25  can also be a cylinder mechanism moving linearly, and the first housing  241  is connected to the output end of the second moving assembly  25 . In this way, the second moving assembly  25  can still achieve movement of the first moving assembly  24  in the second direction. 
     Referring to  FIG.  9   , in some embodiments, the polishing device  10  may further include a driving assembly  12  and a third moving assembly  13 . 
     The driving assembly  12  is coupled to the controller and connected to the polishing assembly  11 , the driving assembly  12  is used to drive the polishing assembly  11  to rotate along an axis, to adjust the polishing angle of the polishing assembly  11  relative to the workpiece  200 . The third moving assembly  13  is coupled to the controller and connected to the driving assembly  12 . The third moving assembly  13  is used to drive the driving assembly  12  and the polishing assembly  11  to move in a third direction, the third direction being different from the first direction and the second direction, so that the polishing assembly  11  is brought closer to or farther from the workpiece  200 . The third direction is the Z-axis direction as shown in  FIG.  9   , and the third direction is perpendicular to the first direction and the second direction. 
     In some embodiments, the polishing device  10  may further include a carrying member  14  and a bracket  15 . 
     The polishing assembly  11  is arranged on the carrying member  14 . The carrying member  14  is rotatably arranged on the bracket  15  and is connected to the driving assembly  12 . The driving assembly  12  is connected to the bracket  15 . The driving assembly  12  is used to drive the carrying member  14  to rotate along an axial direction, so that the polishing assembly  11  rotates along an axial direction. The controller controls the driving assembly  12  to drive the carrying member  14  to rotate along the axis of the carrying member  14 . The bracket  15  is connected to the third moving assembly  13 . The bracket  15  drives the driving assembly  12 , and the carrying member  14  and the polishing assembly  11  along the third direction under the drive of the third moving assembly  13 . The axial direction is the axis of the carrying member  14 . 
     In other embodiments, the number of the polishing assemblies  11  can also be two, three or more, and two, three or more. The polishing assembly  11  is arranged on different surfaces of the carrying member  14 , to allow polishing of the workpiece  200  with different surfaces, reduce the wear of the single polishing assembly  11 , and help to improve the service life of the polishing apparatus  100 . 
     In some embodiments, the third moving assembly  13  may include a third housing  131 , a third guide rail  132 , a third transmission member  133 , a third sliding plate  134 , a third driving member  135 , a third sliding block  136 , a third sliding seat  137 , and a third buffering member  138 . 
     The third housing  131  is used to accommodate and carry the third guide rail  132 , the third transmission member  133 , the third sliding plate  134 , the third driving member  135 , the third sliding block  136 , the third sliding seat  137 , and the third buffering member  138 . The third housing  131  can be used as a support structure of the polishing device  10 . The number of the third guide rails  132  is two, and the two third guide rails  132  are arranged in the third housing  131  and extend along the third direction. The number of the third sliding blocks  136  is four, two of which are arranged on a third guide rail  132 . The third transmission member  133  is arranged in the third housing  131  between the two third guide rails  132 , and the third transmission member  133  extends in the third direction. The third sliding seat  137  is slidably arranged on the third transmission member  133 . The third driving member  135  is connected to one end of the third transmission member  133 , the third driving member  135  is used to drive the third transmission member  133  to rotate relative to the third sliding seat  137 , so that the third sliding seat  137  moves along the third transmission member  133 , and the third sliding seat  137  moves along the third direction. The third sliding plate  134  is plate shaped, one side of the third sliding plate  134  is connected to the third sliding seat  137  and the third sliding block  136 , and the third sliding plate  134  moves in the third direction under the driving of the third sliding seat  137 . The other side of the third sliding plate  134  is connected to the bracket  15 , so that the bracket  15  moves in the third direction under the driving of the third sliding plate  134 . The number of the third buffering members  138  is two, respectively arranged on either side of the third sliding plate  134  along the third direction, the third buffering member  138  has elasticity, and the third buffering member  138  provides buffering when the third sliding plate  134  moves excessively in the third direction. 
     In other embodiments, the third sliding plate  134  and the third buffering member  138  can be omitted. In this way, the third sliding seat  137  is directly connected to the bracket  15 . 
     The third transmission member  133  and the third sliding seat  137  can be a ball screw structure, and the third driving member  135  can be a servo motor, the third transmission member  133  is rotatably connected to the third housing  131  through a bearing structure. The third buffering member  138  can be an elastic part made of rubber material. The third buffering member  138  may also be a spring or other elastic component, and the number of the third sliding blocks  136  may be two, three, five, six or more. 
     In other embodiments, the third moving assembly  13  can also be a cylinder mechanism, and the bracket  15  is connected to the output end of the third moving assembly  13 . Therefore, the third moving assembly  13  can still realize movement of the bracket  15  along the third direction. 
     The polishing apparatus  100  can automatically adjust the pressure between the polishing assembly  11  and the workpiece  200  through the mutual cooperation of the rotating mechanism  21 , the sensor  22 , the movement compensation assembly  23 , the first moving assembly  24 , the second moving assembly  25 , the controller, the driving assembly  12 , and the third moving assembly  13 , so that pressure between the polishing assembly  11  and the workpiece  200  remains the preset range. The polishing assembly  11  can evenly polish the workpiece  200 , which can ensure the polishing quality of the workpiece  200  and further improve the production efficiency of the workpiece  200 . 
     For example, the controller controls the rotating mechanism  21  to drive the workpiece  200  to rotate the second preset angle relative to the polishing assembly  11 , and controls at least one of the first moving assembly  24  to drive the workpiece  200  to move along the first direction and the second moving assembly  25  to drive the workpiece  200  to move along the second direction. When the workpiece  200  rotates relative to the polishing assembly  11 , another corner of the workpiece  200  moves and rubs against the polishing assembly  11  for polishing. The second preset angle can be 90°. After the rotating mechanism  21  drives the workpiece  200  to rotate the second preset angle relative to the polishing assembly  11 , the long side of the workpiece  200  close to the polished arc angle is in contact with the polishing assembly  11 , and the workpiece  200  returns to the initial position. 
     the workpiece  200  is controlled to move along the direction of compensation movement to compensate the preset distance, so that the force exerted by the workpiece  200  when it meets the workpiece  200  remains the preset range. 
     For example, when the force sensed by the sensor  22  exceeds the preset range, the controller controls the movement compensation assembly  23  to drive the workpiece  200  to move along the direction of compensation movement to compensate the preset distance, so that the workpiece  200  is closer to or farther from the polishing assembly  11 , and the force exerted by the workpiece  200  when it meets the workpiece  200  falls within the preset range. 
     Referring to  FIG.  10   , The present disclosure further provides a polishing apparatus  300 , the polishing apparatus  300  is used to polish the workpiece  200  continuously and by cyclic polishing of the workpiece  200 . The polishing apparatus  300  includes a polishing device  10 , a polishing fixing device  20  provided in the above embodiment, and a controller  30 . The controller  30  may be a controller in the polishing apparatus  100 . 
     In the embodiment, the polishing apparatus  300  further includes a rotating device  50 , and the polishing device  10  corresponds to the processing station  40 . The processing station  40  can be understood as the position where the workpiece  200  on the polishing fixing device  20  is polished. In the embodiment, the number of processing stations  40  is three. According to different production requirements, the number of the processing stations  40  can also be one, two, four, five, six or more. 
     The rotating device  50  is coupled to the controller  30 , and the rotating device  50  is connected to the polishing fixing device  20 . The controller  30  controls the rotating device  50  to rotate relative to the processing station  40 , to drive the polishing fixing device  20  to the processing station  40 , to correspond to the polishing device  10 . In the embodiment, the number of polishing devices  10  is three, and the number of polishing fixing devices  20  is four, corresponding to the number of the processing stations  40 . Each polishing fixing device  20  corresponds to a processing station  40 , and three polishing devices  10  correspond to three processing stations  40 . A transmission station  42  is used to place the workpiece  200  on the polishing fixing device  20 . The transmission station  42  is used to take the workpiece  200  from the polishing fixing device  20 , to realize the loading and unloading of the workpiece  200 . 
     Referring to  FIG.  10    and  FIG.  11   , each polishing fixing device  20  corresponds to a processing station  40 , three polishing devices  10  correspond to three processing stations  40 , and the transmission station  42  is used for loading and unloading the workpiece  200 . 
     To facilitate understanding, in this implementation process, three processing stations  40  are defined as the first processing station, the second processing station, and the third processing station, set respectively in a counterclockwise direction. Four polishing fixing devices  20  are defined as the first polishing fixing device, the second polishing fixing device, the third polishing fixing device, and the fourth polishing fixing device, and the polishing device  10  are defined as the first polishing device, the second polishing device, and third polishing device. The initial state of the polishing apparatus  100  is that the first polishing fixing device, the second polishing fixing device, the third polishing fixing device, and the fourth polishing fixing device are located at the transmission station  42 , the first processing station, the second processing station, and the third processing station, the first polishing device, the second polishing device, and the third polishing device are respectively located in the first processing station, the second processing station, and the third processing station, the transmission station  42  is used for loading and unloading the workpiece  200 . Taking the counterclockwise rotation of the rotating device  50  as an example. 
     Firstly, the workpiece  200  is placed on the first polishing fixing device, the second polishing fixing device, the third polishing fixing device, and the fourth polishing fixing device, respectively located in the first processing station, the second processing station, and the third processing station, and correspond to the first polishing device, the second polishing device, and the third polishing device. Then, the controller  30  controls the rotating device  50  to rotate relative to the processing station  40 , and the first polishing fixing device rotates to the first processing station, and the second polishing fixing device, the third polishing fixing device, and the fourth polishing fixing device are respectively located at the second processing station, the third processing station, and the transmission station  42 ; furthermore, the controller  30  controls the workpiece  200  on the first polishing fixing device to move relative to the first polishing fixing device for the first polishing; furthermore, at the transmission station  42 , the workpiece  200  is placed on the fourth polishing fixing device; furthermore, after the first polishing of the first processing station is completed, the controller  30  controls the rotating device  50  to rotate relative to the processing station  40 , the first polishing fixing device rotates to the second processing station, and the fourth polishing fixing device rotates to the first processing station, the second polishing fixing device, and the third polishing fixing device are respectively located in the third processing station and the transmission station  42 ; furthermore, the controller  30  controls the workpiece  200  on the fourth polishing fixing device to move relative to the first polishing fixing device for the first polishing, and controls the workpiece  200  on the first polishing fixing device to move relative to the second polishing fixing device for the second polishing; furthermore, the workpiece  200  at the transmission station  42 , is placed on the polishing assembly  11  of the third polishing fixing device; furthermore, after the first processing station finishes the first polishing and the second processing station finishes the second polishing, the controller  30  controls the rotating device  50  to rotate relative to the processing station  40 , the first polishing fixing device rotates to the third processing station, the fourth polishing fixing device rotates to the second processing station, and the third polishing fixing device rotates to the first processing station, and the second polishing fixing device is located at the transmission station  42 ; furthermore, the controller  30  controls the workpiece  200  on the third polishing fixing device to move relative to the first polishing fixing device for the first polishing, controls the workpiece  200  on the fourth polishing fixing device to move relative to the second polishing fixing device for the second polishing, and controls the workpiece  200  on the first polishing fixing device to move relative to the third polishing fixing device for the third polishing; furthermore, the workpiece  200  at the transmission station  42 , is placed on the second polishing fixing device; furthermore, after the first processing station finishes the first polishing, the second processing station finishes the second polishing, and the third processing station finishes the third polishing, the controller  30  controls the rotating device  50  to rotate relative to the processing station  40 , the first polishing fixing device rotates to the transmission station  42 , the fourth polishing fixing device rotates to the third processing station, the third polishing fixing device rotates to the second processing station, and the second polishing fixing device rotates to the first processing station; furthermore, the controller  30  controls the workpiece  200  on the second polishing fixing device to move relative to the first polishing fixing device for the first polishing, controls the workpiece  200  on the third polishing fixing device to move relative to the second polishing fixing device for the second polishing, and controls the workpiece  200  on the fourth polishing fixing device to move relative to the third polishing fixing device for the third polishing; furthermore, since the workpiece  200  on the first polishing fixing device is polished after the first polishing, the second polishing, and the third polishing, the polished workpiece  200  is removed from the first polishing fixing device, and a new workpiece  200  is placed for polishing on the first polishing fixing device. In this way, the rotating device  50  drives the polishing fixing device  20  to rotate circularly, so that the workpiece  200  on each polishing fixing device  20  is polished for a first time, a second time, and a third time in turn. The first polishing device, the second polishing device, and the third polishing device on the polishing apparatus  100  work at the same time, while the transmission station  42  realizes loading and unloading of the workpiece  200 , which does not affect the polishing of the workpiece  200  by the polishing device  10 . The present disclosure improves the polishing efficiency of the workpiece  200 . 
     The first polishing is the rough polishing of the workpiece  200 , the second polishing is a finer polishing of the workpiece  200 , and the third polishing is the final polishing of the workpiece  200 . 
     In the embodiment, the polishing apparatus  300  can also include a polishing moving mechanism  80 . The polishing moving mechanism  80  is coupled to the controller  30  and slidably connected to the polishing device  10 . The polishing moving mechanism  80  is used to move the polishing device  10  to the processing station  40 . In this way, the present disclosure can realize the movement of the polishing device  10  relative to the polishing fixing device  20 . 
     In the embodiment, the polishing apparatus  300  can also include a supply device  60 , supplying polishing liquid, which is arranged adjacent to the rotating device  50 . The supply device  60  is used to supply the polishing liquid when the workpiece  200  is being polished at the processing station  40 . The polishing liquid can reduce the temperature between the polishing device  10  and the workpiece  200 , and avoid color change, deformation, and other problems of the workpiece  200  due to high temperatures, it also has the properties of degreasing, cleaning, rust prevention, polishing, etc., which is conducive to improving the polishing quality of the workpiece  200 . The polishing liquid can be polycrystalline diamond polishing liquid, silicon oxide polishing liquid, cerium oxide polishing liquid, aluminum oxide, silicon carbide polishing liquid, etc. 
     In the embodiment, the polishing apparatus  300  further includes a liquid collecting tank  70 , the liquid collecting tank  70  matches with a rotating device  50 . The rotating device  50  is arranged in the liquid collecting tank  70 , and the liquid collecting tank  70  is used to collect waste polishing liquid discharged from the rotating device  50 . 
     In the embodiment, the liquid collecting tank  70  includes an installation area  71  for mounting at least part of the rotating device  50 , the installation area  71  is separated by an installation member  72 , and the installation member  72  is roughly cylindrical. The area of the liquid collecting tank  70  except the installation area  71  can collect the polishing liquid. The installation member  72  also has the function of a barrier to prevent the polishing liquid from flowing into the rotating device  50 . 
     In the embodiment, the polishing apparatus  300  further includes a frame  90 . The frame  90  is used to carry the liquid collecting tank  70 , the polishing device  10 , the polishing moving mechanism  80 , the polishing fixing device  20 , and the rotating device  50 . The polishing liquid supply device  60  can be arranged on or adjacent to the frame  90 . The controller  30  can be arranged on or adjacent to the frame  90 . 
     Referring to  FIG.  12   , in the embodiment, the rotating device  50  includes a rotating plate  51  and a driving mechanism  52 . The rotating plate  51  is substantially square with rounded corners. Four polishing fixing devices  20  are equally arranged on the rotating plate  51 . The driving mechanism  52  is connected to the rotating plate  51 , and the driving mechanism  52  is used to drive the rotating plate  51  to rotate, thereby driving the polishing fixing device  20  to rotate. In other embodiments, the rotating plate  51  may also be circular or square. 
     In some embodiments, the driving mechanism  52  includes a rotary splitter  521 , a servo motor drives the rotary splitter  521  to rotate. The rotary splitter  521  is used to control the rotation of the rotating plate  51 , so that the rotating plate  51  drives the polishing fixing device  20  to the processing station  40 . In the embodiment, the rotary splitter  521  is used to control the rotating plate  51  to rotate 90° per step, of the rotating plate  51 , the polishing fixing device  20  is moved to the adjacent processing station  40  or the transmission station  42 . 
     In other embodiments, when the number of the processing stations  40  and the transmission stations  42  is two, three, five, six or more, the rotary splitter  521  controls the rotating plate  51  to rotate a corresponding number of degrees per step, that is, 180°, 120 °, 72°, or 60°. The number of the polishing fixing devices  20  is equal to the number of the processing stations  40  and the transmission stations  42 . 
     In the embodiment, the rotating device  50  includes an isolating cover  53 , the isolating cover  53  is roughly cylindrical, and is arranged between the rotating plate  51  and the driving mechanism  52 . The isolating cover  53  is located in the installation area  71  of the liquid collecting tank  70 . The isolating cover  53  is used to prevent the polishing liquid from entering the driving mechanism  52  when it is discharged into the liquid collecting tank  70 . The driving mechanism  52  is thus protected from being polluted by polishing liquid through the cooperation of the isolating cover  53  and the installation member  72 , ensuring the normal and stable operation of the driving mechanism  52 . 
     In the embodiment, the rotating device  50  further includes a slip ring assembly  54 , the slip ring assembly  54  is arranged on the side of the rotating plate  51  away from the driving mechanism  52 . The slip ring assembly  54  can supply electricity to the polishing fixing device  20  on the rotating plate  51 , so that when the polishing fixing device  20  rotates with the rotating plate  51 , the electrical circuit remains stable. 
     In some embodiments, the rotating plate  51  can be provided with a guide groove (not shown in the figure), which is used to guide the polishing liquid on the rotating plate  51 . The guide groove can be a through hole through the rotating plate  51 , and the through hole is connected to the liquid collecting tank  70 . Thereby, the polishing liquid can be discharged into the liquid collecting tank  70  as soon as possible after it falls on the rotating plate  51 . 
     Referring to  FIG.  13   , the polishing device  10  is slidably connected to the polishing moving mechanism  80 , which drives the polishing device  10  towards or away from the polishing fixing device  20 . In the embodiment, the polishing moving mechanism  80  drives the polishing device  10  towards or away from the polishing fixing device  20  along the first direction. The first direction is the X axis direction as shown in  FIG.  2   . 
     The polishing moving mechanism  80  includes a housing  81 , a movement slide rail  82 , a movement transmission member  83 , a movement sliding member  84 , a sliding block  85 , a movement sliding plate  86 , a movement driving member  87 , and two movement buffering members  88 . 
     The housing  81  is used for carrying the movement slide rail  82 , the movement transmission member  83 , the movement sliding member  84 , the sliding block  85 , the movement sliding plate  86 , the movement driving member  87 , and two movement buffering members  88 . The movement slide rail  82  is arranged on the housing  81  and extends along the first direction, one end of the polishing device  10  is connected to the movement transmission member  83 , and the other end of the movement sliding member  84  is connected to the movement sliding plate  86 . One end of the movement sliding plate  86  connected to the movement sliding member  84  is also connected to the sliding block  85 , the sliding block  85  slides on the movement slide rail  82 , the movement sliding plate  86  is away from the movement sliding member  84 , and one side of the sliding block  85  is connected to the rotating mechanism  21 . The two movement buffering members  88  are arranged on both sides of the movement sliding plate  86  along the first direction. The movement driving member  87  is arranged on the housing  81  and connected to the movement transmission member  83 . The movement driving member  87  is used to drive the movement transmission member  83  to rotate, so that the movement sliding member  84  moves along the movement transmission member  83 , thereby moving the sliding block  85 , the movement sliding plate  86  and the polishing device  10  along the movement slide rail  82 . 
     The movement transmission member  83  and the movement sliding member  84  can be a ball screw mechanism. The movement driving member  87  can be a servo motor, and the movement transmission member  83  can be rotatably connected to the housing  81  through a bearing. The number of movement slide rails  82  and sliding blocks  85  is two. The movement sliding plate  86  is plate shaped. The two movement buffering members  88  may be elastic elements made of rubber materials. The moving buffer movement buffering member  88  can also be a spring or other elastic component, and the number of the sliding blocks  85  can also be four, six or more. 
     In other embodiments, the polishing moving mechanism  80  can also be a cylinder mechanism, so the polishing device  10  is connected to the output end of the polishing moving mechanism  80 . Therefore, the polishing moving mechanism  80  can still move the polishing device  10  in the first direction. 
     The polishing apparatus  300  provided in the embodiment can realize automatic polishing of the workpiece  200  through the mutual cooperation of the polishing device  10 , the polishing fixing device  20 , the controller  30 , the processing station  40 , the transmission station  42 , the rotating device  50 , the polishing moving mechanism  80 , the polishing liquid supply device  60 , and the liquid collecting tank  70 . Automatic polishing of the workpiece  200  is highly efficient, which is conducive to improving the production efficiency of the workpiece  200 . The present disclosure can ensure the polishing quality of the workpiece  200  and improve the production yield and overall efficiency of the workpiece  200  through the cooperation between the sensor  22  of the polishing fixing device  20  and the movement compensation assembly  23 . The rotating device  50  drives the polishing fixing device  20  to rotate circularly, so that the workpiece  200  on the polishing fixing device  20  will be moved relative to the polishing device  10  on the processing station  40  for polishing. When the workpiece  200  is loaded and unloaded, other workpieces  200  are not affected by the polishing device  10 . The present disclosure improves the polishing efficiency of the workpiece  200 . 
     Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present disclosure, but not to limit the present disclosure. As long as they are within the essential spirit of the present disclosure, the above embodiments are appropriately made and changes fall within the scope of protection of the present disclosure.