Spherical surface machining tool
By designing a spherical machining fixture, the problem of machining spherical heat sinks was solved by utilizing negative pressure adsorption and disassembly assistance components. This enabled a convenient machining process and efficient workpiece fixation, reducing the difficulty of removing the workpiece.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-03-17
AI Technical Summary
The lack of suitable machining fixtures for spherical heat sinks in the existing technology leads to machining difficulties.
A spherical machining fixture was designed, including a reference base and a mounting platform. The heat sink is fixed by negative pressure adsorption, and a spherical surface is formed by the linkage of the X and Y axes of the lathe. It is equipped with a disassembly aid to facilitate the removal of the workpiece, and rubber contacts prevent scratches.
This technology enables convenient machining and stable fixation of the spherical surface of the heat sink, reduces the difficulty of removing the workpiece, and improves machining efficiency and safety.
Smart Images
Figure CN223997352U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heat sink processing technology, and in particular to a spherical surface processing tooling. Background Technology
[0002] Heat sinks are components used to dissipate heat from electronic components that generate a lot of heat. They are mostly made of aluminum alloy, brass, or bronze, and are generally in the form of plates, sheets, or multiple sheets.
[0003] Before the heat sink is shaved, the workpiece usually needs to be turned and ground to ensure the flatness and smoothness of the workpiece surface before subsequent precision machining such as shaving is carried out.
[0004] Regarding the aforementioned technologies, the inventors discovered that some existing heat sinks require pre-machining and grinding to form a spherical surface to accommodate the near-spherical cavity within the installation space. Currently, there are no readily available machining tools, making the machining process quite difficult. Utility Model Content
[0005] To facilitate the machining of spherical surfaces for heat sinks, this application provides a spherical machining fixture.
[0006] The spherical surface machining tooling provided in this application adopts the following technical solution:
[0007] A spherical machining fixture includes a reference base for mounting in a three-jaw chuck of a lathe, and a mounting platform fixedly connected to the reference base for mounting a workpiece. The reference base is a cylindrical structure with a negative pressure through hole extending along its central axis. The mounting platform is a circular plate structure with its central axis coinciding with the central axis of the reference base. A negative pressure adsorption hole is perpendicular to the plate surface and communicates with the negative pressure through hole. A workpiece embedding groove is formed on the plate surface of the mounting platform on the side away from the reference base, and the opening of the negative pressure adsorption hole is located at the bottom of the workpiece embedding groove.
[0008] Preferably, the mounting platform is provided with limiting protrusions at intervals at the edge positions corresponding to the workpiece embedding groove, and the protrusion direction of the limiting protrusions faces the inside of the workpiece embedding groove.
[0009] Preferably, two finger grooves are symmetrically formed on the mounting platform at the edge position corresponding to the workpiece embedding groove. The depth of the finger grooves is greater than the depth of the workpiece embedding groove, and one side of the finger grooves is connected to the workpiece embedding groove.
[0010] Preferably, one of the finger grooves is provided with a disassembly assist component, which includes a lever, a rotating support, a spring, and a guide post. The lever is V-shaped with its opening facing away from the bottom of the finger groove, and the inflection point of the lever is rotatably connected to the rotating support. The rotating support is installed at the bottom of the finger groove. The guide post is perpendicular to the bottom of the finger groove and its upper end is rotatably connected to the lever on the side away from the workpiece insertion groove. The bottom of the finger groove has a guide hole for the guide post to be inserted along the direction perpendicular to the bottom of the groove. A pressure ring is fixed on the section of the guide post located in the guide hole. The spring is sleeved on the guide post, with one end fixed to the bottom of the guide hole and the other end abutting against the pressure ring.
[0011] Preferably, the lever includes two connecting plates arranged side by side, with a pressing head fixedly connected to the end of the two connecting plates away from the workpiece embedding groove, and a rubber contact engaged at the end of the two connecting plates close to the workpiece embedding groove.
[0012] Preferably, a horizontal plate is fixedly connected at the position where the two connecting plates connect to the rubber contacts. Multiple protrusions are fixedly fixed at intervals on the horizontal plate. A cap is fixedly connected to the top of each protrusion, and the diameter of the cap is larger than the diameter of the protrusion. A snap-fit hole is opened at the position of the rubber contact corresponding to the cap and the protrusion, and the cap and the protrusion snap into the snap-fit hole.
[0013] Preferably, the reference base further includes a base plate, the base plate having a circular plate structure, and the mounting platform and the base plate are connected by countersunk bolts.
[0014] Preferably, a connecting groove is provided on the side of the mounting platform away from the workpiece embedding groove, and the connecting groove is connected to the negative pressure through hole and the negative pressure adsorption hole; the bottom area of the connecting groove is larger than the hole area of the negative pressure through hole.
[0015] In summary, this application includes the following beneficial technical effects:
[0016] 1. First, when machining the workpiece, the vacuum device is turned on to create a negative pressure environment, which attracts the heat sink and allows for machining. When machining the spherical surface of the heat sink, the X and Y axes of the lathe are linked, and the cutting tool gradually moves from the center of the workpiece to the edge. As the workpiece rotates, the spherical surface is gradually formed. After machining is completed, the vacuum device is turned off, and the workpiece can be removed. The entire machining fixture has a simple structure, and it is relatively convenient to fix and remove the workpiece.
[0017] 2. Secondly, by setting a disassembly assist component in one of the finger slots, pressing the end of the lever away from the workpiece insertion slot can cause the end of the lever close to the workpiece insertion slot to move upward, thereby helping to pry up the workpiece, breaking the suction force between the workpiece and the workpiece insertion slot, making it easier and less strenuous to remove the workpiece.
[0018] 3. Furthermore, by setting rubber contacts, the rubber contacts are less likely to slip with the workpiece and are less likely to scratch the workpiece. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.
[0020] Figure 2 This is a schematic diagram of the overall structure of the workpiece installed in Embodiment 2 of this application.
[0021] Figure 3 This is a cross-sectional view of a portion of the structure of Embodiment 2 of this application.
[0022] Figure 4 This is a schematic diagram of the connection structure of the rubber contact in Embodiment 2 of this application.
[0023] Figure 5 This is a schematic diagram of the overall structure of Embodiment 3 of this application.
[0024] Figure 6 This is a cross-sectional view of Embodiment 3 of this application.
[0025] Explanation of reference numerals in the attached drawings: 1. Reference base; 11. Base plate; 2. Mounting platform; 21. Negative pressure adsorption hole; 22. Workpiece embedding groove; 23. Limiting protrusion; 24. Finger groove; 25. Connecting groove; 3. Countersunk bolt; 4. Disassembly assist component; 41. Lever; 411. Connecting plate; 412. Pressing head; 413. Rubber contact; 4131. Snap-fit hole; 4132. Horizontal plate; 4133. Protruding post; 4134. Cap; 42. Rotating support; 43. Spring; 44. Guide post; 441. Pressure ring; 5. Workpiece. Detailed Implementation
[0026] The following combination Figures 1-6 This application will be described in further detail below.
[0027] Example 1:
[0028] A spherical surface machining fixture, as shown in the reference Figure 1 The system includes a reference base 1 for mounting in a lathe three-jaw chuck and a mounting platform 2 fixedly connected to the reference base 1 for mounting a workpiece 5. The reference base 1 is a cylindrical structure with a negative pressure through hole extending along its central axis. The mounting platform 2 is a circular plate structure with its central axis coinciding with the central axis of the reference base 1. A negative pressure adsorption hole 21 is perpendicular to the plate surface of the mounting platform 2 and communicates with the negative pressure through hole. A workpiece embedding groove 22 is provided on the plate surface of the mounting platform 2 away from the reference base 1, and the opening of the negative pressure adsorption hole 21 is located at the bottom of the workpiece embedding groove 22.
[0029] With the above setup, the vacuum device's tubing passes through the three-jaw chuck and connects to the negative pressure through-hole of the reference base 1. When machining workpiece 5, the vacuum device is activated to generate a negative pressure environment 441, which attracts the heat sink, allowing for machining. When machining the spherical surface of the heat sink, the X and Y axes of the lathe are linked, and the cutting tool gradually moves from the center of workpiece 5 to the edge. As workpiece 5 rotates, the spherical surface gradually forms. After machining is completed, the vacuum device is turned off, and workpiece 5 can be removed. The entire machining fixture structure is simple, and fixing and removing workpiece 5 is relatively convenient. In this embodiment, the spherical surface does not only refer to a standard spherical surface but also includes arc surfaces, both of which can be machined using the above fixture.
[0030] Limiting protrusions 23 are spaced apart on the mounting platform 2 at the edge positions corresponding to the workpiece embedding groove 22, with the protrusion direction of the limiting protrusions 23 facing inwards towards the workpiece embedding groove 22; notches adapted to the limiting protrusions 23 are provided on the outer edge of the circular workpiece 5. The limiting protrusions 23 can restrict the rotation of the workpiece 5, making it easier for the workpiece 5 to remain stable during processing. If the workpiece 5 is rectangular, the workpiece embedding groove 22 is also rectangular, and the workpiece embedding groove 22 itself has the ability to restrict the rotation of the workpiece 5, so there is no need to set the limiting protrusions 23.
[0031] Two finger grooves 24 are symmetrically opened on the mounting platform 2 at the edge position corresponding to the workpiece embedding groove 22. The depth of the finger grooves 24 is greater than the depth of the workpiece embedding groove 22. One side of the finger grooves 24 is connected to the workpiece embedding groove 22 and the other side is connected to the outer edge of the mounting platform 2.
[0032] Because the workpiece 5 is fixed by negative pressure adsorption, after the processing is completed and the negative pressure environment is released, the workpiece 5 is sometimes still tightly attached to the mounting platform 2, making it inconvenient to remove. Therefore, the positions of the two finger grooves 24 can make it easier for the operator to remove the workpiece 5.
[0033] Example 2:
[0034] A spherical surface machining fixture, as shown in the reference Figure 2 , Figure 3The difference between this embodiment and Embodiment 1 is that a disassembly assist component 4 is provided in one of the finger grooves 24. The disassembly assist component 4 includes a lever 41, a rotating support 42, a spring 43, and a guide post 44. The lever 41 is V-shaped and its opening faces away from the bottom of the finger groove 24. The inflection point of the lever 41 is rotatably connected to the rotating support 42. The rotating support 42 is installed at the bottom of the finger groove 24. The guide post 44 is perpendicular to the bottom of the finger groove 24 and its upper end is rotatably connected to the lever 41 on the side away from the workpiece embedding groove 22. The bottom of the finger groove 24 has a guide hole for the guide post 44 to be inserted along the direction perpendicular to the bottom of the groove. A pressure ring 441 is fixed on the section of the guide post 44 located in the guide hole. The spring 43 is sleeved on the guide post 44, with one end fixed to the bottom of the guide hole and the other end abutting against the pressure ring 441.
[0035] With the above settings, pressing the end of the lever 41 away from the workpiece embedding groove 22 can cause the end of the lever 41 close to the workpiece embedding groove 22 to move upward, thereby helping to pry up the workpiece 5, breaking the suction between the workpiece 5 and the workpiece embedding groove 22, making it easier and less strenuous to remove the workpiece 5.
[0036] Furthermore, the lever 41 includes two connecting plates 411 arranged side by side, with a pressing head 412 fixedly connected to the end of the two connecting plates 411 away from the workpiece embedding groove 22, and a rubber contact 413 snapped into the end of the two connecting plates 411 near the workpiece embedding groove 22.
[0037] With the above settings, it is easier to press the lever 41; the rubber contact 413 is less likely to slip with the workpiece 5, and it is also less likely to scratch the workpiece 5.
[0038] For details, please refer to Figure 4 A horizontal plate 4132 is fixedly connected at the position where the rubber contact 413 is connected to the two connecting plates 411. Multiple protrusions 4133 are fixedly fixed at intervals on the horizontal plate 4132. A cap 4134 is fixedly connected to the top of each protrusion 4133. The diameter of the cap 4134 is larger than the diameter of the protrusion 4133. A snap-fit hole 4131 is opened at the position of the rubber contact 413 corresponding to the cap 4134 and the protrusion 4133. The cap 4134 and the protrusion 4133 can be snapped into the snap-fit hole 4131.
[0039] With the above settings, when the rubber contact 413 is severely worn, it can be easily removed and replaced with a new rubber contact 413.
[0040] Example 3:
[0041] A spherical surface machining fixture, as shown in the reference Figure 5 , 6The difference between this embodiment and the first embodiment is that the reference base 1 also includes a base plate 11, which has a circular plate structure. The mounting platform 2 and the base plate 11 are connected by countersunk bolts 3.
[0042] With the above settings, different mounting platforms 2 can be replaced according to the different shapes of workpiece 5, eliminating the need to manufacture all the tooling as a whole. The tooling occupies less space and has a lower manufacturing cost.
[0043] In this embodiment, the workpiece 5 is rectangular, the workpiece embedding groove 22 is also rectangular, and there are multiple negative pressure adsorption holes 21 that are dispersed at the four corners of the workpiece embedding groove 22, which provides a better adsorption and fixation effect for the workpiece 5.
[0044] To make the adsorption force more sufficient, a connecting groove 25 is provided on the side of the mounting platform 2 away from the workpiece embedding groove 22. The connecting groove 25 is connected to the negative pressure through hole and the negative pressure adsorption hole 21. The bottom area of the connecting groove 25 is larger than the hole area of the negative pressure through hole.
[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A spherical machining tool comprising a reference seat (1) for mounting in a lathe three-jaw chuck, characterized in that: Also include fixedly connected to the reference seat (1) for mounting the workpiece (5) mounting platform (2), the reference seat (1) is cylindrical structure, the reference seat (1) is along the central axis direction through the negative pressure through hole; the mounting platform (2) is circular plate structure, the mounting platform (2) center axis coincides with the center axis of the reference seat (1), the mounting platform (2) is perpendicular to the plate surface through the negative pressure adsorption hole (21) is opened, negative pressure adsorption hole (21) and negative pressure through hole communication; the mounting platform (2) away from the reference seat (1) one side of the plate surface is provided with workpiece embedded groove (22), negative pressure adsorption hole (21) opening is located in the bottom of workpiece embedded groove (22).
2. The spherical surface machining tooling of claim 1, wherein: The mounting platform (2) is provided with a limiting protrusion (23) at the edge position corresponding to the workpiece embedded groove (22), and the protruding direction of the limiting protrusion (23) is towards the inside of the workpiece embedded groove (22).
3. The spherical surface machining tooling of claim 1, wherein: The mounting platform (2) is provided with two finger grooves (24) at the edge position corresponding to the workpiece embedded groove (22), the depth of the finger groove (24) is greater than the depth of the workpiece embedded groove (22), and one side of the finger groove (24) is communicated with the workpiece embedded groove (22).
4. The spherical surface machining tooling of claim 3, wherein: One of the finger grooves (24) is provided with a disassembly assisting piece (4), the disassembly assisting piece (4) comprises a lever (41), a rotating support (42), a spring (43) and a guide column (44), the lever (41) is V-shaped and the opening is directed away from the bottom of the finger groove (24), and the inflection point position of the lever (41) is rotationally connected with the rotating support (42); the rotating support (42) is installed at the bottom of the finger groove (24); the guide column (44) is perpendicular to the groove bottom of the finger groove (24) and the upper end is rotationally connected to one side of the lever (41) away from the workpiece embedded groove (22), the groove bottom of the finger groove (24) is provided with a guide hole for the insertion of the guide column (44) along the direction perpendicular to the groove bottom, and the guide column (44) is provided with a compression ring (441) on the section in the guide hole; the spring (43) is sleeved on the guide column (44), one end is fixedly connected with the bottom of the guide hole and the other end abuts against the compression ring (441).
5. A spherical surface machining tooling as claimed in claim 4, wherein: The lever (41) comprises two connecting plates (411) arranged side by side, a pressing head (412) is fixedly connected to one end of the two connecting plates (411) away from the workpiece embedded groove (22), and a rubber contact (413) is clamped to one end of the two connecting plates (411) close to the workpiece embedded groove (22).
6. A spherical surface machining tooling as claimed in claim 5, wherein: Two connecting plates (411) are fixedly connected with a transverse plate (4132) at the positions of connecting the rubber contacts (413), a plurality of convex columns (4133) are fixedly arranged on the transverse plate (4132) at intervals, a cap head (4134) is fixedly connected to the top end of each convex column (4133), the diameter of the cap head (4134) is larger than the diameter of the convex column (4133); a clamping hole (4131) is formed on the rubber contact (413) at the position corresponding to the cap head (4134) and the convex column (4133), and the cap head (4134) and the convex column (4133) are clamped in the clamping hole (4131).
7. The spherical surface machining tooling of claim 1, wherein: The reference seat (1) further comprises a base plate (11) in a circular plate structure, and the mounting platform (2) and the base plate (11) are connected through the setting of a countersunk bolt (3).
8. A spherical surface machining tooling as claimed in claim 7, wherein: A communication groove (25) is formed on the side of the mounting platform (2) away from the workpiece embedding groove (22), the communication groove (25) is communicated with the negative pressure through hole and the negative pressure suction hole (21), and the bottom area of the communication groove (25) is larger than the hole area of the negative pressure through hole.