Grinding and polishing device

A grinding and polishing device includes a main body, a grinding disk, a sample disk, a first console, and a second console. The main body includes a support table and a support column. The support table is coupled to the support column. The grinding disk is fixed on the support table and includes a polishing surface. The sample disk is fixed on the support column and configured to hold a preform. The first console is electrically coupled to the sample disk and used for controlling a distance between the preform held by the sample disk and the grinding disk. The second console is electrically coupled to the grinding disk and used for controlling a working state of the grinding disk for grinding and polishing the preform.

FIELD

The subject matter herein generally relates to a grinding and polishing device for grinding and polishing a preform.

BACKGROUND

Existing grinding and polishing machines include manual grinding and polishing machines and automatic grinding and polishing machines. The manual grinding and polishing machine has disadvantages of low safety performance, low stability, and low work efficiency. The working efficiency of the automatic grinding machine is high, but the automatic grinding machine is not suitable for preforms of different shapes and sizes, and a polishing thickness is uncontrollable.

DETAILED DESCRIPTION

FIG.1shows an embodiment of a grinding and polishing device100. The grinding and polishing device100is used to clamp a preform200and perform grinding and polishing treatment on the preform200to obtain a finished product with a smooth surface.

The grinding and polishing device100includes a main body10, a grinding disk20, a sample disk30, a first console50, and a second console60. The grinding disk20is fixed on the main body10. The sample disk30is movably arranged on the main body10and faces the grinding disk20. The sample disk30is used to fix the preform200in position. The first console50is coupled to the grinding disk20and is used to control a rotation speed of the grinding disk20. The second console60is coupled to the sample disk30and used to control movement of the sample disk30.

The main body10includes a support table11and a support column12. The support column12is arranged on the support table11. The support column12and the support table11are coupled to each other. The grinding disk20is arranged on the support table11, and the sample disk30is movably arranged on the support column12.

The grinding disk20includes a polishing surface21facing away from the support table11. The sample disk30is arranged at an end of the support column12away from the support table11. The sample disk30is used for holding the preform200toward the polishing surface21, and the grinding disk20is rotated to polish the preform200held by the sample disk30.

Specifically, the sample disk30is movably disposed on the support column12through a telescopic member40. One end of the telescopic member40is directly or indirectly coupled to the support column12, and another end of the telescopic member40is coupled to the sample disk30. The telescopic member40is used to adjust a distance between the sample disk30and the grinding disk20.

Referring toFIG.2, the sample disk30includes a base31, a bracket32, a fastener33, a clamp34and a positioning knob35. The sample disk30is fixed to the telescopic member40through the base31. In one embodiment, the base31is fixed to the telescopic member40by screws.

The base31includes a fixing surface311. The fixing surface311faces the grinding disk20and is substantially parallel to the polishing surface21.

A first sliding groove312is defined in the fixing surface311. A direction in which the first sliding groove312extends on the fixing surface311is defined as a first direction L1, a direction parallel to the fixing surface311and perpendicular to the first direction L1is defined as a second direction L2, and a direction perpendicular to the first direction L1and the second direction L2is defined as a third direction L3.

Referring toFIG.3, a cross-section of the first sliding groove312taken along a direction perpendicular to the first direction L1intersects the fixing surface311at a first point A and a second point B. A distance between the point A and the point B is defined as a distance D1. At least one plane that is different from the fixing surface311and parallel to the fixing surface311intersects the cross-section of the first sliding groove312along the direction perpendicular to the first direction L1at a third point C and a fourth point D. A distance between the third point C and the fourth point D is defined as a distance D2. The distance D1 is less than the distance D2. In one embodiment, the cross-section is a trapezoid, and the trapezoid is smaller at an end toward the fixing surface311and larger away from the fixing surface311. In other embodiments, the cross-section may be an ellipse or another irregular shape that meets the above conditions.

A number of the brackets32on the base31is two, and each bracket32includes a first surface321and a second surface322. The first surface321is opposite to the second surface322. A first protrusion323is located on the first surface321and corresponds to the first sliding groove312. The second surface322is fixed with the clamp34. The first protrusion323is embedded in the first sliding groove312and can slide along the first sliding groove312, thereby driving the clamp34to move.

In one embodiment, a cross-sectional shape of the first protrusion323along the direction perpendicular to the first direction L1is trapezoidal, so that the first protrusion323embedded in the first sliding groove312prevents the bracket32from separating from the base31.

The first protrusion323defines a receiving hole324penetrating the first protrusion323along the first direction L1, and the receiving hole324is configured to receive the positioning knob35. An inner wall of the receiving hole324is provided with an internal thread, and an outer wall of the positioning knob35is provided with an external thread adapted to the internal thread. Each of two ends of the first sliding groove312is provided with a blocking portion313. When the bracket32is closely attached to the preform200, that is, when the first protrusion323is located at a certain position in the first sliding groove312, the positioning knob35passes through an opening between one of the blocking portions313and the first sliding groove312and passes through the receiving hole324of the first protrusion323, so that the positioning knob35fixes the bracket32at a certain position of the base31.

Referring toFIG.4, each of the brackets32defines a second sliding groove325penetrating through the first surface321and the second surface322. The second sliding groove325extends along the second direction L2. In one embodiment, the second sliding groove325is a through hole. Each of the clamps34is rotationally arranged on the bracket32. When the clamp34is rotated to a certain angle, the clamp34is fixed to the bracket32by a fastener33. In one embodiment, the fastener33is a screw.

The bracket32further includes a second protrusion342and defines a recessed portion326that is recessed inwardly on the second surface322along a side wall of the second sliding groove325. The recessed portion326is used to accommodate a portion of the second protrusion342, so that the second protrusion342slides along the second sliding groove325and prevents the clamp34from falling off the bracket32. A number of the clamps34fixed on each bracket32is two, so that four clamps34are provided on each base31. A surface of each clamp34is provided with the second protrusion342. The second protrusion342is embedded in the second sliding groove325and can slide along the second sliding groove325to drive the clamp34to move.

Referring toFIG.5, a cross-section of the second sliding groove325taken along a direction perpendicular to the second direction L2intersects the first surface321at a fifth point E and a sixth point F. A distance between the fifth point E and the sixth point F is defined as a distance D3. At least one plane that is different from the first surface321and parallel to the first surface321intersects the cross-section of the second sliding groove325along the direction perpendicular to the second direction L2at a seventh point G and an eighth point H. A distance between the seventh point G and the eighth point H is defined as a distance D4. The distance D3 is less than the distance D4. In one embodiment, a cross-sectional shape of the second sliding groove325is stepped, and the stepped shape is smaller toward the first surface321and larger toward the second surface322. In other embodiments, the cross-sectional shape may be trapezoidal, elliptical, or another irregular shape that meets the above conditions.

The second protrusion342substantially matches the second sliding groove325. In one embodiment, a cross-sectional shape of the second protrusion342is stepped. In other embodiments, the cross-sectional shape of the second protrusion342may be trapezoidal, elliptical, or other irregular shapes that meet the above conditions.

Referring toFIG.6, when the preform200has a cubic shape with two parallel surfaces, such as a cube or a rectangular parallelepiped, each of the brackets32may not be provided with the second sliding groove325, and the clamp34may not be provided with the second protrusion342, and the preform200can be clamped by controlling a relative distance of the two brackets32on the base31along the two parallel surfaces of the cube or cuboid. In another embodiment, when the preform200is a cube or a cuboid or another shape having two parallel surfaces, each of the brackets32may be provided with the second sliding groove325, and the clamp34may be provided with the second protrusion342.

Referring toFIG.7, when the preform200is a regular or irregular polygonal structure, such as a seven-sided prism, at least one of the brackets32is provided with the second sliding groove325, and the corresponding clamp34is provided with the second protrusion342. The preform200can be clamped by rotating the angle of the clamp34and adjusting the relative distance between the two brackets32.

Refer toFIG.8, when the preform200is a round structure having a curved surface, such as a cylindrical or elliptical column, at least one of the brackets32is provided with the second sliding groove325, the corresponding clamp34is provided with the second protrusion342, and at least three brackets32have a contact point with the preform200. The at least three contact points between the brackets32and the preform200are not on a same straight line to ensure that the preform200can be clamped and fixed. In other embodiments, the second sliding groove325can be provided on two brackets32, and the second protrusion342can be provided on the corresponding two clamps34.

Referring again toFIG.2, a surface of each clamp34for contacting with the preform200is provided with a first elastic member345. The first elastic member345may be a polymer film that provides an anti-slip function and prevents the clamp34from damaging the preform200due to an excessive clamping force.

Referring toFIG.9, a second elastic member42is provided between the base31and the telescopic member40. The second elastic member42may be a spring or a polymer material having elasticity. During operation of the grinding and polishing device100, the second elastic member42is used to buffer pressure of the sample disk30and absorb shock.

The first console50is electrically coupled to the grinding disk20and is used to control a working state of the grinding disk20, such as a rotation speed, a working time, and the like. In one embodiment, the first console50is provided on the main body10. In other embodiments, a position of the first console50is not limited.

The second console60is electrically coupled to the telescopic member40and used to control a telescopic length of the telescopic member40to control a distance between the sample disk30and the grinding disk20, thereby facilitating the grinding disk20to polish the preform200. In one embodiment, the second console60is located at an end of the support column12facing away from the support platform11and coupled to the telescopic element40. In other embodiments, a position of the second console60is not limited.

The grinding and polishing device100can control the rotation speed of the grinding disk20through the first console50, and control the distance between the preform200and the grinding disk20through the second console60, which is beneficial to control a polishing thickness of the preform200. Automatic grinding and polishing is achieved, and a production yield is improved. In addition, through the structural design of the sample plate30, the preform200of any shape can be automatically ground and polished, so that the shape of the preform200is not limited.