High-stability zero-point positioning tool

Abstract

The invention discloses a high-stability zero-point positioning tool, and relates to the technical field of part machining positioning tools, the high-stability zero-point positioning tool comprises a base and a plurality of positioning pins arranged on the base, the positioning pins are in one-to-one correspondence with pre-machining holes in cooling fins and are used for being inserted into the corresponding pre-machining holes in the cooling fins, and the positioning pins are arranged on the base. A positioning pin is arranged on the base, a positioning block is fixedly arranged on the side wall of the positioning pin and used for abutting against the bottom end of a cooling fin, a fixing structure used for fixing the cooling fin is arranged on the positioning pin, a supporting table is arranged on the base, and an elastic supporting piece is arranged on the supporting table and used for supporting a middle overhanging area of the cooling fin. According to the application, the overhanging vibration generated in the tooth relieving process of the cooling fin can be effectively reduced, the deformation of the cooling fin is avoided, and the machining precision and quality of the cooling fin are improved.

Description

Technical Field

[0001] This application relates to the technical field of part processing positioning tools, and particularly to a zero-point positioning tool with high stability. Background Art

[0002] As a key component in electronic devices, the heat sink is mainly used to dissipate heat from heat-generating components, and its materials are mostly metals with excellent thermal conductivity such as aluminum alloy, brass, or bronze. During the processing of the heat sink, it usually goes through processes such as turning, grinding, and fluting in sequence, and finally forms a plate-like or multi-sheet structure to improve the heat dissipation efficiency.

[0003] Currently, when performing the fluting process on the heat sink, to ensure the processing accuracy, the zero-point positioning method is usually adopted, that is, the positioning is achieved by the positioning pin being in positioning fit with the pre-processed holes on the heat sink. However, for some long-strip heat sinks or thin-plate heat sinks, this traditional positioning tool is prone to cantilever vibration during the fluting process, resulting in deformation of the heat sink and affecting the processing accuracy and quality of the heat sink. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, this application provides a zero-point positioning tool with high stability.

[0005] A zero-point positioning tool with high stability provided by this application adopts the following technical solutions: A zero-point positioning tool with high stability includes a base and a plurality of positioning pins arranged on the base. The positioning pins correspond one-to-one to the pre-processed holes on the heat sink and are used to insert into the corresponding pre-processed holes on the heat sink. A positioning block is fixedly arranged on the side wall of the positioning pin, and the positioning block is used to abut against the bottom end of the heat sink. A fixing structure for fixing the heat sink is arranged on the positioning pin. A support table is arranged on the base, and an elastic support member is arranged on the support table. The elastic support member is used to support the middle cantilever region of the heat sink.

[0006] Optionally, the positioning pin is detachably arranged on the base.

[0007] Optionally, an installation post is arranged at the bottom end of the positioning pin, a positioning groove adapted to the installation post is opened on the base, an external thread is arranged on the side wall of the installation post, and an internal thread adapted to the external thread on the installation post is arranged on the side wall of the positioning groove.

[0008] Optionally, there are a plurality of positioning grooves, and each positioning groove is arranged in a matrix distribution on the top end of the base.

[0009] Optionally, a blocking plug is slidably arranged in each of the positioning grooves. A return spring is also arranged in the positioning groove for supporting the blocking plug, and the blocking plug is used for blocking the positioning groove.

[0010] Optionally, the fixing structure includes a locking block and a driving assembly. A receiving groove is formed in the side wall of the positioning pin, and the receiving groove is arranged on the side of the positioning block away from the base. The locking block is slidably arranged in the receiving groove and is used for abutting against the top end of the heat sink. The driving assembly is used for driving the locking block to slide.

[0011] Optionally, the driving assembly includes an elastic member, an expansion airbag and an air pump. The elastic member is used for driving the locking block to slide into the interior of the receiving groove. The expansion airbag is arranged in the receiving groove. An air inlet communicating with the receiving groove is formed in the side wall of the mounting post. The expansion airbag is communicated with an air inlet pipe, and the air inlet pipe is communicated with the air inlet. An air flow channel is arranged in the base. The air pump is communicated with a ventilation pipe, and the ventilation pipe is communicated with the air flow channel. A ventilation port communicating with the air flow channel is arranged on the side wall of each positioning groove. The blocking plug is used for closing the ventilation port, and when the mounting post is completely installed in the positioning groove, the ventilation port is communicated with the air inlet.

[0012] Optionally, the elastic support member includes a support frame and a damping spring. The support frame is slidably arranged on the support platform along the direction perpendicular to the top end of the base. The damping spring is arranged on the support platform for supporting the support frame, and the support frame is used for supporting the middle overhanging area of the heat sink.

[0013] Optionally, a plurality of support rollers are rotatably arranged at the top end of the support frame. The support rollers are used for abutting against the middle overhanging area of the heat sink and are in rolling connection with the heat sink.

[0014] Optionally, the elastic support member includes an elastic support pad. The elastic support pad is arranged on the support platform and is used for abutting against the middle overhanging area of the heat sink.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application can achieve precise positioning of the heat sink through the cooperation of the positioning pin and the pre-processed hole of the heat sink. The positioning block abuts against the bottom end of the heat sink to play an auxiliary positioning role. The fixing structure can firmly fix the heat sink on the positioning tooling. The elastic support member supports the middle overhanging area of the heat sink, which can reduce the overhanging vibration of the heat sink generated during the process of milling the teeth, avoid deformation of the heat sink, and improve the processing accuracy and quality of the heat sink.

[0016] 2. The support frame slides on the support table along the direction perpendicular to the top end of the base and is supported by the damping spring, which can effectively support the middle overhanging area of the heat sink, reduce the overhanging vibration of the strip-shaped or thin-plate heat sink during the chip removal process, avoid the deformation of the heat sink, and improve the processing accuracy and quality of the heat sink.

[0017] 3. The support roller is rotatably arranged at the top end of the support frame and is in rolling connection with the heat sink, which can further reduce the frictional resistance between the heat sink and the support frame, make the heat sink smoother during the chip removal process, reduce the damage and error caused by friction, and improve the processing accuracy and quality of the heat sink. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application; Figure 2 is the partial structural sectional view of Embodiment 1 of the present application; Figure 3 is the structural schematic diagram of the positioning pin used in Embodiment 1 of the present application; Figure 4 is the structural sectional view of the base used in Embodiment 1 of the present application; Figure 5 is the overall structural schematic diagram of Embodiment 2 of the present application.

[0019] Description of the Reference Numerals: 1, base; 11, positioning groove; 12, retaining plug; 13, return spring; 14, air flow channel; 15, ventilation port; 2, positioning pin; 21, positioning block; 22, mounting post; 23, locking block; 24, accommodating groove; 25, elastic member; 26, expansion airbag; 261, intake pipe; 27, air pump; 271, ventilation pipe; 28, intake port; 3, support table; 31, guide rod; 32, nut; 4, elastic support member; 41, support frame; 42, damping spring; 43, support roller; 44, elastic support pad. Detailed Embodiments

[0020] The following will combine the attached Figure 1 - attached Figure 5 , clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can fully combine the embodiments of the present invention and obtain other embodiments without creative labor, and these embodiments are also within the protection scope of the present invention.

[0021] The inventors of the present application found that when performing the process of milling teeth on a heat sink, in order to ensure machining accuracy, the zero-point positioning method is usually adopted. However, for some long-strip heat sinks or thin-plate heat sinks, the traditional zero-point positioning tooling is prone to overhanging vibration during the milling teeth process, resulting in deformation of the heat sink and affecting the machining accuracy and quality of the heat sink. Therefore, the present application discloses a zero-point positioning tooling with high stability, mainly adopting the following solutions: Embodiment 1

[0022] Embodiment 1 of the present application discloses a zero-point positioning tooling with high stability. Refer to Figure 1 , which includes a base 1, positioning pins 2, a support table 3, and elastic support members 4. Among them, multiple positioning pins 2 are provided and are all fixedly arranged at the top of the base 1. Each positioning pin 2 corresponds to a pre-machined hole on the heat sink and can be inserted into the corresponding pre-machined hole to achieve preliminary positioning of the heat sink. The length direction of the positioning pin 2 is perpendicular to the top of the base 1, and a positioning block 21 is fixedly arranged on the side wall of the positioning pin 2. The positioning block 21 plays a role in supporting and positioning the heat sink, making the heat sink more stable during the positioning process, ensuring machining accuracy. A fixing structure for fixing the heat sink is also provided on the positioning pin 2. The support table 3 is arranged on the base 1, and the elastic support members 4 are arranged on the support table 3, which can support the middle overhanging area of the heat sink, avoid deformation of the heat sink caused by overhanging vibration, and improve the stability and accuracy of the heat sink during the milling teeth process.

[0023] Refer to Figure 1 and Figure 2 , specifically, the shape and size of the support table 3 can be designed according to the type and quantity of the elastic support members 4. The elastic support members 4 include a support frame 41 and damping springs 42. The support frame 41 is slidably arranged on the support table 3 along the direction perpendicular to the top of the base 1. A plurality of guide rods 31 are fixedly arranged at the top of the support table 3. The length direction of the guide rods 31 is perpendicular to the top of the support table 3, and each guide rod 31 slidably penetrates through the support frame 41. External threads are provided on the side walls of the guide rods 31, and nuts 32 are sleeved and threadedly connected on the guide rods 31. A damping spring 42 is sleeved on each guide rod 31, and the two ends of the damping spring 42 are respectively abutted against the support table 3 and the support frame 41. The middle overhanging area of the heat sink is supported by the support frame 41, reducing the overhanging vibration of the long-strip or thin-plate heat sink during the milling teeth process, avoiding deformation of the heat sink, and improving the machining accuracy and quality of the heat sink.

[0024] Refer to Figure 1 and Figure 2, a plurality of support rollers 43 are rotatably arranged at the top end of the support frame 41. The support rollers 43 are used to abut against the middle overhanging area of the heat sink and are in rolling connection with the heat sink. The arrangement of the support rollers 43 can reduce the friction force between the support frame 41 and the heat sink, enabling the heat sink to move more smoothly during the processing, reducing the damage and errors caused by friction, and improving the processing accuracy and quality of the heat sink.

[0025] Referring to Figure 1 and Figure 3 , to meet the positioning requirements of different types of heat sinks and improve the versatility of the tooling, the positioning pin 2 is detachably arranged on the base 1. Specifically, an installation post 22 is arranged at the bottom end of the positioning pin 2. The installation post 22 is integrally formed with the positioning pin 2. A plurality of positioning grooves 11 adapted to the installation post 22 are formed at the top end of the base 1. The positioning grooves 11 are arranged in a matrix distribution at the top end of the base 1. External threads are provided on the side wall of the installation post 22, and internal threads adapted to the external threads on the installation post 22 are provided on the side wall of the positioning groove 11. Insert the installation post 22 on the positioning pin 2 into the corresponding positioning groove 11, and through the threaded fit between the installation post 22 and the positioning groove 11, the positioning pin 2 can be installed and fixed on the base 1. Further, through the plurality of positioning grooves 11 arranged in a matrix distribution at the top end of the base 1, the installation position of the positioning pin 2 can be flexibly adjusted, and it can adapt to the pre-processing hole distribution of heat sinks with different sizes and shapes, making the zero-point positioning tooling have better versatility and flexibility, thereby enhancing the positioning stability and applicability of the tooling to different heat sinks.

[0026] Referring to Figure 2 , to prevent sundries from entering the installation groove and affecting the subsequent installation of the positioning pin 2, a blocking plug 12 is slidably arranged in each positioning groove 11. The blocking plug 12 is adapted to the positioning groove 11. An annular groove is provided on the side wall of the blocking plug 12, and a sealing rubber ring is sleeved in the annular groove. A return spring 13 is also arranged in the positioning groove 11. One end of the return spring 13 is connected to the bottom end of the positioning groove 11, and the other end is connected to the blocking plug 12. Under the supporting force of the return spring 13, the top end of the blocking plug 12 is flush with or higher than the top end of the base 1 to block the positioning groove 11.

[0027] Referring to Figure 3 , specifically, the fixing structure includes a locking block 23 and a driving component. A receiving groove 24 is formed on the side wall of the positioning pin 2, and the receiving groove 24 is arranged on the side of the positioning block 21 away from the base 1. The locking block 23 is slidably arranged in the receiving groove 24 along the direction perpendicular to the length of the positioning pin 2 and is used to abut against the top end of the heat sink. The shape of the locking block 23 is adapted to the receiving groove 24 and can slide flexibly in the receiving groove 24. Chamfers are provided at the angular positions of the locking block 23 to facilitate sliding to the top end of the heat sink. The driving component is used to drive the locking block 23 to slide.

[0028] Reference Figure 2 and Figure 3 ,The driving assembly includes an elastic member 25, an expansion airbag 26 and an air pump 27. The elastic member 25 is made of an elastic steel sheet, and the elastic steel sheet is designed in a U shape. One end of the elastic steel sheet is fixedly connected to the side wall of the accommodation groove 24, and the other end is fixedly connected to the locking block 23. When there is no external force, the elastic member 25 positions the locking block 23 at the initial position. At this time, the locking block 23 contracts into the accommodation groove 24. The expansion airbag 26 is arranged in the accommodation groove 24 and is clamped between the elastic steel sheets. An air inlet 28 communicating with the accommodation groove 24 is formed in the side wall of the mounting post 22. The expansion airbag 26 is communicated with an air inlet pipe 261, and the air inlet pipe 261 is communicated with the air inlet 28.

[0029] Reference Figure 2 and Figure 4 ,An air flow channel 14 is arranged in the base 1. The air pump 27 is communicated with an air pipe 271, and the air pipe 271 is communicated with the air flow channel 14. Air vents 15 communicating with the air flow channel 14 are arranged on the side walls of the positioning grooves 11. When there is no positioning pin 2 installed in the positioning groove 11, the air vent 15 is closed by the sealing rubber ring on the blocking plug 12 to avoid gas leakage. And when the mounting post 22 is completely installed in the positioning groove 11, the air vent 15 is communicated with the air inlet 28. When the air pump 27 works, gas enters the air flow channel 14 through the air pipe 271, and then enters the expansion airbag 26 through the air vent 15 and the air inlet 28, causing the expansion airbag 26 to expand, thereby pushing the locking block 23 to slide outwards and abut against the top of the heat sink, realizing the fixation of the heat sink. And synchronous driving of the locking blocks 23 on each positioning pin 2 can be realized, improving the convenience of clamping the heat sink.

[0030] The implementation principle of the zero-point positioning tooling with high stability in Embodiment 1 of the present application is as follows: The zero-point positioning tooling can achieve precise positioning of the heat sink through the cooperation of the positioning pin 2 and the pre-machined hole of the heat sink. The positioning block 21 abuts against the bottom end of the heat sink, playing a supporting and positioning role for the heat sink, making the heat sink more stable during the positioning process, ensuring the machining accuracy. The fixing structure can firmly fix the heat sink on the positioning tooling. The elastic support member 4 supports the middle overhanging area of the heat sink, which can reduce the overhanging vibration of the heat sink during the process of milling the teeth, avoid deformation of the heat sink, and improve the machining accuracy and quality of the heat sink. Embodiment 2

[0031] The difference from Embodiment 1 is: Reference Figure 5, the elastic support member 4 includes an elastic support pad 44. The elastic support pad 44 is disposed on the support platform 3 and is used to abut against the middle overhanging area of the heat sink. The elastic support pad 44 is generally made of elastic materials such as rubber and silica gel, and its shape can be cut according to the shape and size of the heat sink. The elastic support pad 44 is in direct contact with the heat sink and absorbs and buffers the vibration generated by the heat sink during the processing through its own elastic deformation, playing a role of support and vibration reduction. Using the elastic support pad 44 as the elastic support member 4 has a simple structure and is convenient to install. It can effectively support the middle overhanging area of the heat sink by using its own elastic characteristics, reducing the influence of the overhanging vibration on the heat sink. Compared with the elastic support member 4 using the support frame 41 and the damping spring 42, the elastic support pad 44 has a lower cost and can better adapt to heat sinks of different shapes and sizes, improving the versatility of the tooling. This design reduces the production cost while ensuring the processing stability and accuracy of the heat sink, and has good economic benefits.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A zero-point positioning tooling with high stability, characterized in that: It includes a base (1) and a plurality of positioning pins (2) arranged on the base (1). The positioning pins (2) correspond one-to-one to the pre-processed holes on the heat sink and are used to insert into the corresponding pre-processed holes on the heat sink. A positioning block (21) is fixedly arranged on the side wall of the positioning pin (2), and the positioning block (21) is used to abut against the bottom end of the heat sink. A fixing structure for fixing the heat sink is arranged on the positioning pin (2). A support platform (3) is arranged on the base (1), and an elastic support member (4) is arranged on the support platform (3). The elastic support member (4) is used to support the middle overhanging area of the heat sink.

2. The zero-point positioning tooling with high stability according to claim 1, characterized in that: The positioning pin (2) is detachably arranged on the base (1).

3. The high-stability zero-point positioning tooling according to claim 2, characterized in that: An installation post (22) is arranged at the bottom end of the positioning pin (2). A positioning groove (11) adapted to the installation post (22) is formed on the base (1). External threads are arranged on the side wall of the installation post (22), and internal threads adapted to the external threads on the installation post (22) are arranged on the side wall of the positioning groove (11).

4. A highly stable zero-point positioning tooling according to claim 3, characterized in that: A plurality of the positioning grooves (11) are provided, and the positioning grooves (11) are arranged in a matrix distribution at the top end of the base (1).

5. A highly stable zero-point positioning tooling according to claim 4, characterized in that: A blocking plug (12) is slidably arranged in each positioning groove (11). A return spring (13) is also arranged in the positioning groove (11). The return spring (13) is used to support the blocking plug (12), and the blocking plug (12) is used to block the positioning groove (11).

6. The highly stable zero-point positioning tooling according to claim 5, characterized in that: The fixing structure includes a locking block (23) and a driving component. A receiving groove (24) is formed on the side wall of the positioning pin (2), and the receiving groove (24) is arranged on the side of the positioning block (21) away from the base (1). The locking block (23) is slidably arranged in the receiving groove (24) and is used to abut against the top end of the heat sink. The driving component is used to drive the locking block (23) to slide.

7. A zero-point positioning tooling with high stability according to claim 6, characterized in that: The driving component includes an elastic member (25), an expansion airbag (26) and an air pump (27). The elastic member (25) is used to drive the locking block (23) to slide into the interior of the receiving groove (24). The expansion airbag (26) is arranged in the receiving groove (24). An air inlet (28) communicating with the receiving groove (24) is formed on the side wall of the installation post (22). The expansion airbag (26) is communicated with an air inlet pipe (261), and the air inlet pipe (261) is communicated with the air inlet (28). An air flow channel (14) is arranged in the base (1). The air pump (27) is communicated with an air pipe (271), and the air pipe (271) is communicated with the air flow channel (14). Air vents (15) communicating with the air flow channel (14) are arranged on the side walls of the positioning grooves (11). The blocking plug (12) is used to close the air vents (15), and when the installation post (22) is completely installed in the positioning groove (11), the air vents (15) are communicated with the air inlet (28).

8. A zero-point positioning tooling with high stability according to claim 1, characterized in that: The elastic support member (4) includes a support frame (41) and a damping spring (42). The support frame (41) is slidably disposed on the support table (3) in a direction perpendicular to the top end of the base (1). The damping spring (42) is disposed on the support table (3) for supporting the support frame (41), and the support frame (41) is used to support the middle overhanging area of the heat sink.

9. A zero-point positioning tooling with high stability according to claim 8, characterized in that: A plurality of support rollers (43) are rotatably disposed at the top end of the support frame (41). The support rollers (43) are used to abut against the middle overhanging area of the heat sink and are in rolling connection with the heat sink.

10. A zero-point positioning tooling with high stability according to claim 1, characterized in that: The elastic support member (4) includes an elastic support pad (44). The elastic support pad (44) is disposed on the support table (3) and is used to abut against the middle overhanging area of the heat sink.

Images