Abstract:
A method for flattening a part of a heat dissipating tube which is embedded in a trench of a heat dissipating body and protrudes from a heat dissipating body. The method comprises the steps of: pressing a part of the heat dissipating tube protruded from the trench of the base by using a pressing unit. A device for performing the method is also disclosed. The device comprising: a retainer for retaining the heat dissipating body, and the heat dissipating tube being installed in a trench of the heat dissipating body; and a pressing unit capable of moving through the retainer for pressing a protruded portion of the heat dissipating tube protruded from the trench.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a method for flattening a part of a heat dissipating tube which is embedded in a trench of a heat dissipating body and protrudes from a heat dissipating body and a device for performing the same. 
       BACKGROUND OF THE INVENTION 
       [0002]    Heat dissipation is a main concern in electronic industry. Generally, heat dissipation base (a lump sheet or a lump block) and a heat dissipating fin set is used for dissipating heat. Further heat dissipating tube is used for enhancing the effect for dissipating heat. The heat dissipating tube is combined with the heat dissipating base or the heat dissipating fin set. 
         [0003]    Generally, the heat dissipating tube is embedded in a trench of the base or the heat dissipating fin set. As a result, a part of the heat dissipating tube protrudes from the trench, while this will reduce the effect in heat dissipation. Thus, it is necessary to flat the part so as to have better heat dissipation effect. 
         [0004]    Conventionally, heat dissipation tube is punched for flattening. However, the end of a punching block is a plane and the surface of the heat dissipating fin tube is an arc surface. The interior of the heat dissipating tube is filled with fluid. The punching operation will generate concave portion and thus after punching, the punching area of the heat dissipating tube is not flat so that the performance in heat dissipation is bad. 
         [0005]    In one prior art, the punching operation is performed in two stages for flattening. A first punching operation serves to press the protruded portion of the heat dissipating tube so that the portion is embedded into the trench of the heat dissipating body. Then a second punching operation is performed. At this stage, the heat dissipating fin set is punched to be flushed with the surface of the heat dissipating body so as to have a better performance in heat dissipation. 
         [0006]    However, in above mentioned process, the process is tedious and complicated. Furthermore, the cost is high and the manufacturing process is low. Furthermore, the punching process will induce the copper power adhered on the wall of the heat dissipating tube to fall out so as to affect the heat dissipation performance. 
       SUMMARY OF THE INVENTION 
       [0007]    The object of the present invention is to provide a method for flattening a part of a heat dissipating tube which is embedded in a trench of a heat dissipating body and protrudes from a heat dissipating body and further the present invention provide a device for performing the method so that heat source adhered to the heat dissipating body has a preferred heat dissipation effect. 
         [0008]    To achieve above object, the present invention provides a method for flattening a part of a heat dissipating tube which is embedded in a trench of a heat dissipating body and protrudes from a heat dissipating body. The method comprises the steps of: pressing a part of the heat dissipating tube protruded from the trench of the base by using a pressing unit. 
         [0009]    Moreover, the present invention provides a device for flattening a heat dissipating tube which is combined with a heat dissipating body. The device comprises: a retainer for retaining the heat dissipating body, and the heat dissipating tube being installed in a trench of the heat dissipating body; and a pressing unit moving through the retainer for pressing a protruded portion of the heat dissipating tube protruded from the trench. 
         [0010]    The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]      FIG. 1  is a schematic view showing the heat dissipating body with a heat dissipating tube of the present invention before the heat dissipating tube is flattened. 
           [0012]      FIG. 2  is a schematic view showing the heat dissipating body with a heat dissipating tube of the present invention after the heat dissipating tube is flattened. 
           [0013]      FIG. 3  is a schematic view showing that a roller is used to flatten a heat dissipating tube according to the present invention before the heat dissipating tube is flattened. 
           [0014]      FIG. 3-1  is a schematic view showing that a roller is used to flatten a heat dissipating tube according to the present invention after the heat dissipating tube is flattened. 
           [0015]      FIG. 4  is a schematic view showing that a T shape rod is used to flatten a heat dissipating tube according to the present invention before the heat dissipating tube is flattened. 
           [0016]      FIG. 4-1  is a schematic view showing that another T shape rod is used to flatten a heat dissipating tube according to the present invention before the heat dissipating tube is flattened. 
           [0017]      FIG. 5  shows that two sides of the trench are protruded before the heat dissipating tube is flattened. 
           [0018]      FIG. 5-1  shows that protruded two sides of the trench illustrated in  FIG. 5  is flattened according to the present invention. 
           [0019]      FIG. 6  shows that the present invention is applied to a heat dissipating fin set before the heat dissipating tube is not flattened. 
           [0020]      FIG. 7  shows that the protruded portions of the heat dissipating tubes in  FIG. 6  are flattened. 
           [0021]      FIG. 8  is a schematic view showing that a roller is used to flat a heat dissipating tube according to the present invention before the heat dissipating tube is flattened, wherein the heat dissipating tube is embedded into a heat dissipating tube. 
           [0022]      FIG. 8-1  is a schematic view showing that a roller is used to flat a heat dissipating tube according to the present invention after the heat dissipating tube is flattened, wherein the heat dissipating tube is embedded into a heat dissipating tube. 
           [0023]      FIG. 9  is a schematic view showing that a T shape rod is used to flat a heat dissipating tube according to the present invention before the heat dissipating tube is flattened, wherein the heat dissipating tube is embedded into a heat dissipating tube. 
           [0024]      FIG. 9-1  is a schematic view showing that another T shape rod is used to flat a heat dissipating tube according to the present invention before the heat dissipating tube is flattened, wherein the heat dissipating tube is embedded into a heat dissipating tube. 
           [0025]      FIG. 10  shows that two sides of the trench are protruded before the heat dissipating tube is flattened, wherein the heat dissipating tube is embedded into a heat dissipating tube. 
           [0026]      FIG. 10-1  shows that protruded two sides of the trench illustrated in  FIG. 5  is flattened according to the present invention, wherein the heat dissipating tube is embedded into a heat dissipating tube. 
           [0027]      FIG. 11  is a schematic view showing another embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0028]    In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. 
         [0029]    Referring to  FIG. 1 , a general structure for the heat dissipating body  30  of the present invention is illustrated. The heat dissipating body  30  includes a base  32 , a heat dissipating fin set  34  below the base  32  and a heat dissipating tube  36  passing through the heat dissipating fin set  34  and embedded in a trench of the heat dissipating body  30  at an upper side of the heat dissipating body  30 . The heat dissipating body  30  protrudes from an upper surface of the base  32 . Referring to  FIG. 2 , it is illustrated that the heat dissipating tube  36  at an upper side of the base  32  is flattened to be flushed with the upper surface of the base  32 . 
         [0030]    In use, a heat source is adhered to the upper surface of the base  32  so that a flushed heat dissipating tube  36  adhered to the trench of the base  32  is beneficial for adhering the heat source. 
         [0031]    With reference to FIGS.  3  and  3 - 1 , the process for flattening the heat dissipating tube  36  is illustrated. Firstly, the heat dissipating tube  36  is placed in the trench at the upper surface of the base  32 . It is illustrated that a part of the heat dissipating tube  36  protrudes from the trench of the upper surface of the base  32 . It is not flat. 
         [0032]    Next, a pressing unit  38  (in this embodiment, it is a roller) with a round cross section rolls through the upper surface so as to flatten the upper side of the heat dissipating tube  36  at the trench. However, the roller may be replaced by a pressing object which moves through the upper surface of the base  32  horizontally. However, the roller is a better form, which will cause that the stress to the heat dissipating tube  36  is minimized. 
         [0033]    Punching operation is not a preferred way, since the punching will make the upper side of the heat dissipating tube  36  unflat. 
         [0034]    After flattening the heat dissipating tube  36  at the upper surface, the upper side of the heat dissipating tube  36  at the upper surface can be polished or ground. The portions of the heat dissipating tube  36  contacting the base  32  and the heat dissipating fin set  34  are coated with heat conductive material, such as heat conductive glue, so as to increase the heat conductivity between the contact area. 
         [0035]    Referring to FIGS.  4  and  4 - 1 , it is illustrated that in this flattening process, in the overall structure  40 , it contain a base  32  of a heat dissipating body  30  placed in a fixing seat  42 . The fixing seat  42  may be for example, a platform or a clamping device, etc. The pressing unit  38  is used to flat the heat dissipating tube  36  by moving horizontally through the heat dissipating tube  36 . 
         [0036]    In this embodiment, the pressing unit  38  has a T shape cross section. In the example of  FIG. 4 , a lower pressing end  50  of the pressing unit  38  has an inclined surface. In operation, the inclined surface of the pressing end  50  is arranged along a longitudinal direction of the heat dissipating tube  36 . By movement of the pressing end  50 , the inclined surface of the pressing end will flatten the heat dissipating tube  36  at the upper surface of the base  32 . However, in  FIG. 4-1 , it is illustrated that the end portion  50  of the pressing unit  38  may have another shape, such as a round tapered shape. 
         [0037]    Referring to FIGS.  5  and  5 - 1 , it is illustrated that for the embodiment illustrated in  FIG. 4 , two sides  52  of the trench of the base  32  are protruded upwards. After pressing, two protruded sides  52  are flattened to cover an upper side of the heat dissipating tube  36  in the trench so that the heat dissipating effect is improved further. 
         [0038]    With reference to  FIG. 6 , it is illustrated that a plurality of heat dissipating tubes  36  are embedded into a heat dissipating fin set  34 . An upper side of the heat dissipating fin set  34  is formed with a plurality of trenches for receiving parts of the plurality of heat dissipating tubes  36  in that the heat dissipating tubes  36  protrudes from the trenches.  FIG. 7  shows that the protruded portions of the heat dissipating tubes  36  are flattened. Thus, the upper sides of the heat dissipating fin set  34  can be used to bear a heat source. 
         [0039]    FIGS.  8  and  8 - 1  show the way for flattening the heat dissipating tubes  36 . A pressing unit  38  (in this embodiment, it is a roller with a round cross section) moves through the upper surface so as to flatten the upper side of the heat dissipating tube  36  at the trench. However, the roller may be replaced by a pressing object which moves through the upper surface of the base  32  horizontally. However, the roller is a better form, which will cause that the stress to the heat dissipating tube  36  is minimized. 
         [0040]    Punching operation is not a preferred way, since the punching will make the upper side of the heat dissipating tube  36  unflat. 
         [0041]    Referring to FIGS.  9  and  9 - 1 , another example for the structure in  FIG. 8  is illustrated. The pressing unit  38  has a T shape cross section. A lower pressing end  50  of the pressing unit  38  has an inclined surface. In operation, the inclined surface of the pressing end  50  is arranged along a longitudinal direction of the heat dissipating tube  36 . By movement of the pressing end  50 , the inclined surface of the pressing end will flatten the heat dissipating tube  36  at the upper surface of the heat dissipating fin set  34 . However, in  FIG. 10-1 , it is illustrated that the end portion  50  of the pressing unit  38  may have another shape, such as a round tapered shape. 
         [0042]    Referring to FIGS.  10  and  10 - 1 , it is illustrated that for the embodiment illustrated in  FIG. 8 , two sides  52  of the trench of the heat dissipating fin set  34  is protruded upwards. After pressing, two protruded sides  52  are flattened to cover an upper side of the heat dissipating tube  36  in the trench so that the heat dissipating effect is improved further. 
         [0043]    Referring to  FIG. 11 , another kind of heat dissipating body  30  is illustrated. In that, two ends of each heat dissipating tubes  36  are embedded into the heat dissipating fin set  34 . A curved end of each heat dissipating tube  36  passes through a through hole of a base  32  and is clamped by two inner sides of the through hole of the base  32 . A top end of the curved end of the heat dissipating tube  36  protrudes from the through hole of the base  32 . However, above mentioned way can be used to flatten the top end of the curved end of the heat dissipating tube  36 . That is, a pressing unit is used to press the top end of the heat dissipating tube  36 . 
         [0044]    The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.