Flanging tooling

Abstract

This utility model relates to the field of battery processing and manufacturing technology, and discloses a flanging fixture, including: a pressing part; a beveling part, detachably sleeved on the outer periphery of the pressing part, the inner peripheral surface of the beveling part having a first bevel, the first bevel being disposed near a first end of the beveling part along the axial direction, and gradually moving away from the pressing part in a direction gradually approaching the first end along the axial direction; and a flattening part, detachably sleeved on the outer periphery of the pressing part, the first end face of the flattening part having a planar structure along the axial direction; wherein, the flanging fixture has a beveling condition in which the beveling part is movably disposed on the outer periphery of the pressing part along the axial direction, and a flattening condition in which the flattening part is movably disposed on the outer periphery of the pressing part along the axial direction. This utility model can simultaneously fold the entire circumference of the flanging structure to rivet the terminal post structure, improving the assembly efficiency of the cover plate assembly.

Description

Technical Field

[0001] This utility model relates to the field of battery processing and manufacturing technology, specifically to flanging tooling. Background Technology

[0002] Terminals are components in a battery used for current input and output. They can be mounted on a cover plate and secured to its upper surface by a flanged structure on the cover plate. To ensure effective pressing, the flanged structure is typically arranged circumferentially around the terminal. However, in related technologies, when folding and pressing the flanged structure onto the upper surface of the terminal, it is impossible to fold the entire flanged structure simultaneously, affecting the assembly efficiency of the cover plate assembly. Utility Model Content

[0003] In view of this, the present invention provides a flanging fixture to solve the problem in related technologies that when the flanging structure is folded and pressed onto the upper surface of the pole post, it is impossible to fold the entire flanging structure at the same time, which affects the assembly efficiency of the cover plate assembly.

[0004] This utility model provides a flanging fixture, comprising: a pressing part; a beveling part, detachably sleeved on the outer periphery of the pressing part, the inner peripheral surface of the beveling part having a first bevel, the first bevel being disposed near a first end of the beveling part along the axial direction, and gradually moving away from the pressing part in a direction that gradually approaches the first end along the axial direction; and a flattening part, detachably sleeved on the outer periphery of the pressing part, the first end face of the flattening part having a planar structure along the axial direction; wherein, the flanging fixture has a beveling condition in which the beveling part is movably disposed on the outer periphery of the pressing part along the axial direction, and a flattening condition in which the flattening part is movably disposed on the outer periphery of the pressing part along the axial direction.

[0005] Beneficial effects: By pressing the pole structure with the pressing part, the sealing element is in a compressed state. In the slanting condition, during the axial movement of the slanting part, the entire circumferential flange structure is tilted by the first slant. Then, in the flattening condition, during the axial movement of the flattening part, the entire circumferential flange structure is pressed onto the insulating element. Therefore, the entire circumferential flange structure can be folded at the same time to rivet the pole structure, improving the assembly efficiency of the cover plate assembly. Attached Figure Description

[0006] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0007] Figure 1 This is a schematic diagram of the structure of a pressing part according to an embodiment of the present utility model; Figure 2 for Figure 1 The top view of the pressing part is shown; Figure 3 This is a schematic diagram of a slanted section according to an embodiment of the present utility model; Figure 4 for Figure 3 The top view of the angled section shown; Figure 5 for Figure 3 The bottom view of the angled section shown; Figure 6 This is a schematic diagram of the structure of a flattening part according to an embodiment of the present utility model; Figure 7 for Figure 6 The top view of the flattened part shown; Figure 8 for Figure 6 The top view of the flattened part is shown; Figure 9 This is a schematic diagram of the flange tooling in the oblique bending condition according to an embodiment of the present utility model; Figure 10 for Figure 9 A top view of the flange fixture shown; Figure 11 for Figure 9 The bottom view of the flange fixture shown; Figure 12 for Figure 10 A cross-sectional view along the AA direction; Figure 13 This is a schematic diagram of the structure of the flanging fixture in the flattening condition according to an embodiment of the present invention; Figure 14 for Figure 13 A top view of the flange fixture shown; Figure 15 for Figure 13 The bottom view of the flange fixture shown; Figure 16 for Figure 14 Cross-sectional view along the BB direction; Figure 17 This is a schematic diagram of the pressing part of this utility model when pressing the pole structure; Figure 18 This is a schematic diagram showing the cooperation between the flanging fixture and the pole structure and the flanging structure in the oblique bending condition according to an embodiment of the present utility model; Figure 19 This is a schematic diagram showing the cooperation between the flanging fixture and the pole post structure and the flanging structure in the flattening operation according to an embodiment of the present invention; Figure 20 This is a schematic diagram of the cover plate assembly in an embodiment of the present utility model; Figure 21 for Figure 20 Top view of the cover plate assembly shown; Figure 22 for Figure 21 A cross-sectional view along the CC direction.

[0008] Explanation of reference numerals in the attached figures: 1. Pressing part; 2. Angled part; 21. First inclined surface; 22. First end; 23. Second inclined surface; 24. Connecting plane; 3. Flattening part; 31. Planar structure; 32. Groove part; 33. Protruding end face; 34. Groove sidewall; 35. First rounded corner structure; 36. Second rounded corner structure; 37. Third inclined surface; 38. Protrusion; 100. Cover plate body; 110. Main body; 120. Flanged structure; 121. Connecting section; 122. Press-fit section; 200. Pole post structure; 210. Pole post body; 220. Insulating component; 300. Sealing component. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0010] The following is combined with Figures 1 to 22 The following describes embodiments of the present invention.

[0011] According to an embodiment of the present invention, a flanging fixture is provided, comprising: a pressing part 1; a beveling part 2, detachably sleeved on the outer periphery of the pressing part 1, the inner peripheral surface of the beveling part 2 having a first bevel 21, the first bevel 21 being disposed near the first end 22 along the axial direction of the beveling part 2, and the first bevel 21 being disposed away from the pressing part 1 in a direction that gradually approaches the first end 22 along the axial direction; and a flattening part 3, detachably sleeved on the outer periphery of the pressing part 1, the first end face of the flattening part 3 having a planar structure 31 along the axial direction; wherein, the flanging fixture has a beveling condition in which the beveling part 2 is movably disposed on the outer periphery of the pressing part 1 along the axial direction, and a flattening condition in which the flattening part 3 is movably disposed on the outer periphery of the pressing part 1 along the axial direction.

[0012] The flanging fixture of this embodiment is used for the assembly of the cover plate assembly. Specifically, it is used to fold the flanging structure 120 of the cover plate body 100 so that the folded flanging structure 120 is riveted to the pole post structure 200. By pressing the pole post structure 200 with the pressing part 1, the sealing member 300 is in a compressed state. In the slanting condition, during the axial movement of the slanting part 2, the first inclined surface 21 pushes the entire circumference of the flanging structure 120 to tilt. Then, in the flattening condition, during the axial movement of the flattening part 3, the entire circumference of the flanging structure 120 is pressed onto the insulating member 220. Therefore, the entire circumference of the flanging structure 120 can be folded at the same time to rivet the pole post structure 200, improving the assembly efficiency of the cover plate assembly.

[0013] It should be noted that you should refer to [link / reference]. Figure 12 During the angled application, the first end 22 is the lower end of the angled section 2. At this time, along the top-to-bottom direction, the first angled surface 21 gradually moves away from the pressing section 1; that is, the upper end of the first angled surface 21 is closer to the pressing section 1 than the lower end of the first angled surface 21. Please refer to [link / reference]. Figure 16 In the flattening process, the first end face is the lower end face of the flattening part 3, and the planar structure 31 formed by the first end face is used to press down the flange structure 120.

[0014] It is worth noting that, such as Figures 17 to 22 As shown, the cover plate body 100 includes a main body 110 and a flange structure 120 protruding from the main body 110. The pole post structure 200 includes a pole post body 210 and an insulating member 220 surrounding the pole post body 210. The pole post structure 200 is disposed on the main body 110, and the flange structure 120 surrounds the pole post structure 200. A sealing member 300 is disposed between the pole post structure 200 and the main body 110. The insulating member 220 surrounds the outer periphery of the pole post body 210 and is used to provide insulation between the main body 110 and the pole post body 210, and between the flange structure 120 and the pole post body 210. During the assembly of the cover plate assembly, the portion of the flange structure 120 near the upper end needs to be folded over so that this portion is riveted to the pole post structure 200 (specifically, riveted to the insulating member 220), so that the flange structure 120 is riveted and fixed to the pole post structure 200. That is, in the assembled cover plate assembly, the flange structure 120 includes a connecting section 121 and a riveting section 122. The connecting section 121 connects the main body 110 and the riveting section 122, and the riveting section 122 is pressed onto the pole post structure 200. The riveting section 122 and the connecting section 121 are arranged at a certain angle. Specifically, the flange structure 120 needs to be folded at a predetermined pressing position. The part of the flange structure 120 below the predetermined pressing position forms the connecting section 121, and the part of the flange structure 120 above the predetermined pressing position forms the riveting section 122.

[0015] Understandably, please refer to Figure 17 Before the flange structure 120 is folded, the folding structure is in a vertical state, that is, it extends axially. When folding the portion of the flange structure 120 above the predetermined pressing position, first, please refer to... Figure 18 Using the slant section 2, push this part to create an inclined state, that is, an inclined state relative to both the vertical and horizontal directions. Afterwards, please refer to... Figure 19 Then, the flattening part 3 is used to press the inclined flange structure 120 along the axial direction, so that the part of the flange structure 120 above the predetermined pressing position is further folded and pressed onto the upper surface of the insulating member 220.

[0016] In one embodiment, such as Figure 12 As shown, the angle between the first inclined surface 21 and the axial direction is α, where α is in degrees, and satisfies 15≤α≤60. This setting facilitates both the tilting of the portion of the flange structure 120 above the predetermined pressing position and the riveting of the portion of the flange structure 120 above the predetermined pressing position to the surface of the pole post structure 200.

[0017] It is worth noting that if the value of α is too large, the tilting degree when pushing the portion of the flange structure 120 above the predetermined pressing position will be large, resulting in greater processing difficulty. If the value of α is too small, the tilting degree of the portion of the flange structure 120 above the predetermined pressing position will be small, making it difficult to vertically rivet the portion of the flange structure 120 above the predetermined pressing position onto the surface of the pole post structure 200. Furthermore, it will cause a large degree of change in the flange structure 120 during riveting, which may affect the structural strength of the flange structure 120 and cause problems such as cracking, thereby affecting the stability of the pole post structure 200.

[0018] Optionally, α can take any value from 15, 18, 20, 22, 25, 28, 30, 32, 35, 38, 40, 42, 45, 48, 50, 52, 55, 58, 60, or a value between any two values.

[0019] In one embodiment, such as Figure 12 As shown, along the axial direction, the height of the first inclined surface 21 is h, where h is in mm, and satisfies 0.5 ≤ h ≤ 2.0. This setting ensures the riveting effect on the pole post structure 200 while avoiding excessive coverage of the pole post structure 200, which would affect the subsequent connection area with the busbar.

[0020] It is worth noting that if the value of h is too large, the distance between the predetermined pressing position and the upper surface of the flange structure 120 will be too large, meaning the height of the pressing section 122 will be too large. This results in the flange structure 120 covering too much of the pole post structure 200 after folding, leaving too little area for connection with the busbar, thus affecting the flow capacity. Conversely, if the value of h is too small, the distance between the predetermined pressing position and the upper surface of the flange structure 120 will be too small, meaning the height of the pressing section 122 will be too small. This results in the flange structure 120 pressing too little onto the pole post structure 200 after folding, affecting the pressing effect and reducing the stability of the pole post structure 200.

[0021] Optionally, h can take any value from 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, or a value between any two values.

[0022] In one embodiment, such as Figure 12 As shown, the outer peripheral surface of the beveling portion 2 has a second bevel 23. The second bevel 23 is disposed near the first end 22, and in the direction that gradually approaches the first end 22 along the axial direction, the second bevel 23 gradually approaches the pressing portion 1. By forming the second bevel 23 on the outer peripheral surface of the beveling portion 2, the beveling portion 2 can avoid surrounding components during use, ensuring the smooth operation of the beveling process.

[0023] It is worth noting that, such as Figure 12 As shown, in the angled operation, the first end 22 is the lower end of the angled part 2. At this time, along the direction from top to bottom, the second inclined surface 23 is gradually moved closer to the pressing part 1. That is, the upper end of the second inclined surface 23 is farther away from the pressing part 1 than the lower end of the second inclined surface 23.

[0024] In one embodiment, such as Figure 12 As shown, the beveled part 2 forms a connecting plane 24 at its first end 22, which connects the first bevel 21 and the second bevel 23. By using the connecting plane 24 to connect the first bevel 21 and the second bevel 23, the lower end of the beveled part 2 is prevented from forming a sharp point, thereby avoiding problems such as bumps and damage.

[0025] In one embodiment, such as Figure 12 As shown, the wall thickness of the beveled section 2 is d, where d is in mm, and it satisfies 0.8 ≤ d ≤ 5. This design ensures the structural strength of the beveled section 2 while avoiding excessive space occupation and weight.

[0026] It is worth noting that if the value of d is too small, the beveled section 2 will be too thin, resulting in low structural strength. When using the beveled section 2 to bevel the flange structure 120, it is easy for the beveled section 2 to break. If the value of d is too large, the beveled section 2 will be too thick, and the space occupied and weight of the beveled section 2 will be too large, making it inconvenient to use.

[0027] Optionally, d can take any value from 0.8, 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, or a value between any two values.

[0028] In one embodiment, such as Figure 16 As shown, the width of the planar structure 31 is w, where w is in mm, and satisfies 0.5 ≤ w ≤ 2.5. This design avoids damage to the flange structure 120 during flattening, while also preventing the flattening part 3 from occupying too much space and being too heavy.

[0029] It is worth noting that if the value of w is too small, the contact area between the planar structure 31 and the flange structure 120 will be too small, which may cause stress concentration and damage to the flange structure 120 during flattening. If the value of w is too large, the flattening part 3 may become too thick, resulting in excessive space and weight, which will make it inconvenient to use.

[0030] Optionally, w can take any value from 0.5, 0.6, 0.8, 0.9, 1, 1.2, 1.5, 1.6, 1.8, 2, 2.2, 2.4, 2.5, or a value between any two values.

[0031] In one embodiment, such as Figure 16 As shown, the flattening part 3 has a groove 32 at one end with a first end face. The groove 32 is located on the side of the first end face near the pressing part 1, and the bottom wall of the groove 32 forms a planar structure 31. By providing the groove 32, the flattening part 3 can accommodate the inclined portion of the flange structure 120 after it has been angled during use, thereby achieving positioning and guidance during the flattening process.

[0032] In one embodiment, such as Figure 16 As shown, the flattened portion 3 forms a protrusion 38 around the recessed portion 32. The side of the protrusion 38 facing the recessed portion 32 forms a groove sidewall 34. The protrusion 38 forms a protruding end face 33 on its first end face. The planar structure 31 and the groove sidewall 34 are connected by a first rounded corner structure 35, and the groove sidewall 34 and the protruding end face 33 are connected by a second rounded corner structure 36. By providing the first rounded corner structure 35, stress concentration can be avoided; by providing the second rounded corner structure 36, damage to the flanged structure 120 can be avoided.

[0033] In one embodiment, such as Figure 16 As shown, the outer peripheral surface of the flattening part 3 has a third inclined surface 37, which is connected to the first end face. The third inclined surface 37 is gradually positioned closer to the pressing part 1 in a direction that gradually approaches the first end face along the axial direction. By forming the third inclined surface 37 on the outer peripheral surface of the flattening part 3, the flattening part 3 can avoid surrounding components during use, ensuring the smooth operation of the flattening process.

[0034] It is worth noting that, such as Figure 16 As shown, in the flattening condition, the first end face is the lower end face of the flattening part 3. At this time, along the direction from top to bottom, the third inclined surface 37 is gradually moved closer to the pressing part 1. That is, the upper end of the third inclined surface 37 is farther away from the pressing part 1 than the lower end of the third inclined surface 37.

[0035] In one embodiment, such as Figure 16 As shown, the wall thickness of the flattened part 3 is b, where b is in mm, and satisfies 0.8 ≤ b ≤ 5. This design ensures the structural strength of the flattened part 3 while avoiding excessive space occupation and weight.

[0036] It is worth noting that if the value of b is too small, the flattening part 3 will be too thin, resulting in low structural strength. When using the flattening part 3 to flatten the flange structure 120, it is easy for the flattening part 3 to break. If the value of b is too large, the flattening part 3 will be too thick, and the space occupied and weight of the flattening part 3 will be too large, making it inconvenient to use.

[0037] Optionally, b can take any value from 0.8, 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, or a value between any two values.

[0038] In one embodiment, such as Figure 2 As shown, on a projection plane perpendicular to the axis, the orthographic projection area of ​​the pressing part 1 is S, where the unit of S is mm. 2 The setting satisfies 80≤S≤1200. This configuration avoids stress concentration in the pressing part 1 when pressing the pole structure 200, and also avoids interference with other surrounding components.

[0039] It is worth noting that if the value of S is too small, the contact area between the pressing part 1 and the pole post structure 200 will be too small, and stress concentration may easily occur when the pressing part 1 presses the pole post structure 200, causing damage to the pole post structure 200. If the value of S is too large, the pressing part 1 will occupy too much space, which may easily cause interference with the angled part 2 and the flattening part 3.

[0040] Optionally, S can take any value from 80, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200 or a value between any two values.

[0041] In one embodiment, such as Figure 12 and Figure 16 As shown, the distance between the outer periphery of the pressing part 1 and the inner periphery of the bendable part 2 or the flattening part 3 is c, where c is in mm, and satisfies 0.1≤c≤1.0. This setting avoids contact and friction between the bendable part 2 and the flattening part 3 and the pressing part 1 during use, while ensuring the contact area between the pressing part 1 and the pole post structure 200.

[0042] It is worth noting that if the value of c is too small, the distance between the pressing part 1 and the bendable part 2, or between the pressing part 1 and the flattening part 3, will be too close. During use, the bendable part 2 and the flattening part 3 will easily come into contact with the pressing part 1, causing friction and affecting the stability of the folding structure during the folding process. If the value of c is too large, the pressing part 1 may become too small, resulting in a small contact area between the pressing part 1 and the pole post structure 200. When the pressing part 1 presses the pole post structure 200, stress concentration may easily occur, causing pressure damage to the pole post structure 200.

[0043] Optionally, c can take any value from 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, or a value between any two values.

[0044] In one embodiment, such as Figure 2 , Figure 4 and Figure 7 As shown, on a projection plane perpendicular to the axial direction, the orthographic projections of the outer periphery of the pressing part 1, the inner periphery of the beveling part 2, and the inner periphery of the flattening part 3 are all unicircles. That is, the flanging fixture of this embodiment is applied to a racetrack-shaped pole post.

[0045] It should be noted that in related technologies, the pole post is usually cylindrical, therefore a flange structure with a circular orthographic projection on a projection plane perpendicular to the axial direction is required to press and fix the pole post. When pressing and riveting the flange structure in related technologies, a roller press is typically used to roll the flange structure one or more times circumferentially to achieve the folding setting of the flange structure. However, in this embodiment, for the monolithic flange structure 120 of the racetrack-shaped pole post, the flange structure 120 has not only a circular arc edge but also a straight edge, making it impossible to simultaneously roll the circular arc edge and the straight edge using a roller press. This results in the cover plate assembly being inconvenient to assemble, affecting assembly efficiency. Therefore, in this embodiment, the part of the flange structure 120 that is higher than the insulating member 220 is first tilted and then pressed to achieve the folding of the flange structure 120 to achieve the riveting and fixing of the pole post structure 200. It can also perform folding processing on the entire circumference of the flange structure 120 at the same time, improve processing efficiency and riveting consistency, and not only ensure the assembly efficiency of the cover plate assembly, but also ensure the assembly quality.

[0046] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A flange-flanging fixture, characterized in that, include: Pressing part (1); The bend (2) is detachably sleeved on the outer periphery of the pressing part (1). The inner periphery of the bend (2) has a first bend (21). The first bend (21) is disposed near the first end (22) of the bend (2) along the axial direction, and the first bend (21) is disposed away from the pressing part (1) in the direction that gradually approaches the first end (22) along the axial direction. The flattening part (3) is detachably sleeved on the outer periphery of the pressing part (1), and the first end face of the flattening part (3) along the axial direction has a planar structure (31). The flange tooling has a slanting condition in which the slanting part (2) is movably disposed along the axial direction on the outer periphery of the pressing part (1), and a flattening condition in which the flattening part (3) is movably disposed along the axial direction on the outer periphery of the pressing part (1).

2. The flanging fixture according to claim 1, characterized in that, The angle between the first inclined plane (21) and the axis is α, where α is in degrees and satisfies 15≤α≤60.

3. The flanging fixture according to claim 1, characterized in that, Along the axial direction, the height of the first inclined plane (21) is h, where h is in mm, and satisfies 0.5≤h≤2.

0.

4. The flanging fixture according to claim 1, characterized in that, The outer peripheral surface of the bend (2) has a second bend (23), which is located near the first end (22) and gradually approaches the pressing part (1) in the direction that gradually approaches the first end (22) along the axial direction.

5. The flanging fixture according to claim 4, characterized in that, The beveled section (2) forms a connecting plane (24) at the first end (22), and the connecting plane (24) connects the first bevel (21) and the second bevel (23).

6. The flanging fixture according to claim 1, characterized in that, The wall thickness of the beveled part (2) is d, and the unit of d is mm, which satisfies 0.8≤d≤5.

7. The flanging fixture according to claim 1, characterized in that, The width of the planar structure (31) is w, and the unit of w is mm, which satisfies 0.5≤w≤2.

5.

8. The flanging fixture according to claim 1, characterized in that, The flattening part (3) has a groove (32) at one end with the first end face. The groove (32) is located on the side of the first end face near the pressing part (1), and the bottom wall of the groove (32) forms the planar structure (31).

9. The flanging fixture according to claim 8, characterized in that, The flattened portion (3) forms a protrusion (38) around the groove portion (32). The side of the protrusion (38) facing the groove portion (32) forms a groove sidewall (34). The protrusion (38) forms a protruding end face (33) on the first end face. The planar structure (31) and the groove sidewall (34) are connected by a first rounded corner structure (35). The groove sidewall (34) and the protruding end face (33) are connected by a second rounded corner structure (36).

10. The flanging fixture according to claim 1, characterized in that, The outer peripheral surface of the flattening part (3) has a third inclined surface (37), which is connected to the first end face. In the direction that gradually approaches the first end face along the axial direction, the third inclined surface (37) is gradually approached by the pressing part (1).

11. The flanging fixture according to claim 1, characterized in that, The wall thickness of the flattened part (3) is b, where b is in mm, and satisfies 0.8≤b≤5.

12. The flanging fixture according to claim 1, characterized in that, The normal projection area of the pressing part (1) in the projection plane perpendicular to the axial direction is S, and the unit of S is mm 2 , and 80≤S≤1200 is satisfied.

13. The flanging fixture according to claim 1, characterized in that, The distance between the outer periphery of the pressing part (1) and the inner periphery of the slanting part (2) or the inner periphery of the flattening part (3) is c, where c is in mm, and satisfies 0.1≤c≤1.

0.

14. The flanging fixture according to claim 1, characterized in that, On a projection plane perpendicular to the axial direction, the orthographic projections of the outer periphery of the pressing part (1), the inner periphery of the slanting part (2), and the inner periphery of the flattening part (3) are all unicircles.

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