Auxiliary pressing clamp, pressing system and pressing method

Abstract

The invention relates to an auxiliary pressing clamp, a pressing system and a pressing method.The auxiliary pressing clamp comprises a pressing column, the pressing column comprises a pressing section and a guiding section arranged on the pressing section, the outer diameter of the pressing section is larger than that of the guiding section, a pressing face is arranged on the side, close to the guiding section, of the pressing section, and the pressing face is used for being attached to the top face of a pressing ring; the outer side wall of the guide section is used for being attached to the inner side wall of the pressing ring. The pressing section is provided with a circuit board containing cavity, and the circuit board containing cavity penetrates through the guide section along the axis of the pressing section. The guide section extends into the inner ring of the pressing ring, the pressing surface is attached to the top surface of the pressing ring, and the outer side wall of the guide section is attached to the inner side wall of the pressing ring, so that the possibility that the pressing column slides relative to the pressing ring in the downward pressing process is effectively reduced, and the possibility that the flexible circuit board is damaged can be reduced by fixing the relative positions of the pressing ring and the pressing column; the technical problem that in the prior art, if the position of the pressing head deviates in the horizontal direction during pressing, products are likely to be unqualified is solved.

Description

Technical Field

[0001] The present application relates to the field of multi-part assembly of sensors, and in particular to an auxiliary pressing fixture, a pressing system and a pressing method. Background Art

[0002] In the production of automotive pressure and temperature sensor products, it is necessary to press the pressure ring to fix the circuit board to ensure the consistency of the entire product and ensure the normal use of the product in the production of the whole vehicle. At present, the common method of riveting is to manually pick up and discharge materials and press press.

[0003] In the related art, after the operator passes the pressure ring through the soft circuit board and places it in the steel shell, the operator places the combination of the pressure ring and the steel shell in the positioning fixture of the press. After the press is pressed down, it touches the pressure head, and the pressure ring is pressed into place by the pressure head to fix the circuit board. However, during the process of the pressure head pressing down, since the outer diameter of the pressure head is smaller than the inner diameter of the steel shell, the position of the pressure head may be offset in the horizontal direction inside the steel shell. If the position is offset, the soft circuit board may be damaged, and the pressure head may also press the pressure ring deeper in some positions and shallower in some positions, resulting in unqualified products. Summary of the invention

[0004] The present application provides an auxiliary pressing fixture, a pressing system and a pressing method, which can solve the technical problem in the related technology that if the position of the pressing head is offset in the horizontal direction during pressing, the flexible circuit board may be damaged, and the pressing head may press the pressing ring deeper in some positions and shallower in some positions, resulting in unqualified products.

[0005] In the first aspect, an embodiment of the present application provides an auxiliary pressing fixture, which includes: a pressing column, the pressing column including a pressing section and a guide section arranged on the pressing section, the outer diameter of the pressing section is larger than the outer diameter of the guide section, and a pressing surface is provided on the side of the pressing section close to the guide section, the pressing surface is used to fit the top surface of the pressing ring, and the outer side wall of the guide section is used to fit the inner side wall of the pressing ring; the pressing section has a circuit board accommodating cavity, and the circuit board accommodating cavity passes through the guide section along the axis of the pressing section.

[0006] In combination with the first aspect, in one embodiment, the guide section includes: a first arc section, the first arc section is fixed to the pressing section; a second arc section, the second arc section is also fixed to the pressing section, and the first arc section and the second arc section are symmetrically arranged along the axis of the pressing section.

[0007] In combination with the first aspect, in one embodiment, the first arc segment and the second arc segment are arranged at intervals along the radial direction of the pressing column, and the gap between the first arc segment and the second arc segment forms a circuit board guide groove, and the circuit board guide groove is connected to the circuit board accommodating cavity.

[0008] In combination with the first aspect, in one implementation, the inner contour shape of the circuit board accommodating cavity is the same as the inner contour shape of the circuit board guiding groove.

[0009] In combination with the first aspect, in one embodiment, the pressing section includes a supporting section and a receiving section connected to the supporting section, the receiving section encloses the circuit board receiving cavity, and the receiving section is connected to the guide section, and the pressing surface is arranged on a side of the receiving section close to the guide section; the pressing surface extends radially along the pressing section, and the pressing surface and the outer side wall of the guide section are perpendicular to each other.

[0010] In combination with the first aspect, in one implementation, a circuit board limiting portion is provided on a side of the supporting section close to the accommodating section.

[0011] In a second aspect, an embodiment of the present application provides a pressing system, which includes the above-mentioned auxiliary pressing fixture, and the pressing system also includes a press.

[0012] On the third aspect, an embodiment of the present application provides a pressing method, which adopts the above-mentioned auxiliary pressing fixture, and the pressing method includes the following steps: inserting the soft circuit board into the circuit board accommodating cavity of the pressing column, and passing the guide section into the pressing ring so that the pressing surface is in contact with the top surface of the pressing ring, and the outer wall of the guide section is in contact with the inner wall of the pressing ring; pressing the pressing section downward so that the pressing section drives the guide section to drive the pressing ring into the steel shell.

[0013] In combination with the third aspect, in one embodiment, the length of the guide section along the axial direction of the press-fit column is smaller than the length of the press ring along the axial direction of the press-fit column.

[0014] In combination with the third aspect, in one implementation, the outer diameter of the guide section is smaller than the inner diameter of the pressing ring, and the outer diameter of the pressing section is larger than the outer diameter of the pressing ring.

[0015] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0016] By extending the guide section into the inner ring of the pressing ring, the pressing surface is fitted to the top surface of the pressing ring, and the outer wall of the guide section is fitted to the inner wall of the pressing ring, which effectively reduces the possibility of the pressing column sliding relative to the pressing ring during the pressing process. The flexible circuit board can be extended into the circuit board accommodating cavity before pressing down. The fixation of the relative position between the pressing ring and the pressing column can also reduce the possibility of damage to the flexible circuit board, which solves the technical problem in the related art that if the position of the pressure head is offset in the horizontal direction during pressing, the product may be unqualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the auxiliary pressing fixture provided in an embodiment of the present application;

[0019] Figure 2 A cross-sectional view of a press-fit column provided in an embodiment of the present application;

[0020] Figure 3 A bottom-up structural schematic diagram of a press-fit column provided in an embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the flexible circuit board installed in the steel shell.

[0022] In the figure:

[0023] 1. Pressing section; 11. Pressing surface; 12. Circuit board accommodating cavity; 13. Supporting section; 14. Accommodating section;

[0024] 2. Guide section; 21. First arc section; 22. Second arc section; 23. Circuit board guide groove;

[0025] 3. Steel shell; 31. Convex ring;

[0026] 4. Flexible circuit board. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] The embodiment of the present application provides an auxiliary pressing fixture, which can solve the technical problem in the related art that if the position of the pressing head is offset in the horizontal direction during pressing, the flexible circuit board may be damaged, and the pressing head may press the pressing ring deeper in some positions and shallower in some positions, resulting in unqualified products.

[0029] See also Figure 1 As shown, an auxiliary pressing fixture provided by an embodiment of the present application may include: a pressing column, the pressing column includes a pressing section 1 and a guide section 2 provided on the pressing section 1, the outer diameter of the pressing section 1 is larger than the outer diameter of the guide section 2, and the pressing section 1 is provided with a pressing surface 11 on the side close to the guide section 2, the pressing surface 11 is used to fit the top surface of the pressing ring, and the outer side wall of the guide section 2 is used to fit the inner side wall of the pressing ring; the pressing section 1 has a circuit board accommodating cavity 12, and the circuit board accommodating cavity 12 passes through the guide section 2 along the axis of the pressing section 1. The pressing column and the guide section 2 may be integrally formed, and the circuit board accommodating cavity 12 may be opened after the pressing column and the guide section 2 are formed. The specific opening method may be to mill a step at one end of the pressing column, and the size of the step corresponds to the inner diameter of the pressing ring to be used. It should be understood that the diameter of the pressing section 1 should be set to be slightly smaller than the inner diameter of the steel shell 3, so that the pressing section 1 can extend into the steel shell 3.

[0030] The embodiment of the present application extends the guide section 2 into the inner ring of the pressure ring, so that the pressing surface 11 is in contact with the top surface of the pressure ring, and the outer wall of the guide section 2 is in contact with the inner wall of the pressure ring. The outer wall of the guide section 2 is in contact with the inner wall of the pressure ring, which provides a certain guiding effect for the pressing process and effectively reduces the possibility of the pressing column sliding relative to the pressure ring during the pressing process; the end of the pressing section 1 away from the guide section 2 is a pressing plane. When the press drives the pressing column to press down, the pressing column can also move along the pressing surface without shifting the relative position of the pressing column and the steel shell 3 in the horizontal direction. The axial movement of the pressing column makes the pressing depth of the pressing ring at each position consistent; and the flexible circuit board 4 can be extended into the circuit board accommodating cavity 12 before being pressed down. The relative position between the pressing ring and the pressing column is fixed, which reduces the possibility that the pressing column may move in the horizontal direction and damage the flexible circuit board 4. During pressing, a part of the pressing surface 11 can cooperate with the limiting ring fixed on the inner wall of the steel shell 3 to limit the pressing depth of the pressing column, which solves the technical problem in the related technology that if the position of the pressure head is offset during pressing, the product may be unqualified.

[0031] In some optional embodiments, the guide section 2 may include: a first arc section 21, the first arc section 21 is fixed to the pressing section 1; a second arc section 22, the second arc section 22 is also fixed to the pressing section 1, and the first arc section 21 and the second arc section 22 are symmetrically arranged along the axis of the pressing section 1. The first arc section 21 and the second arc section 22 can together form a complete circular ring, and the circular ring can have a certain thickness along the radial direction of the pressing column to enhance the strength of the guide section 2. During the pressing process, this enhanced structure can better resist external pressure and internal stress, ensure the smooth pressing, and improve the structural stability after pressing. The outer diameter of the circular ring is smaller than the outer diameter of the pressing section 1, and the flexible circuit board 4 can pass through the circular ring into the circuit board accommodating cavity 12. Optionally, there can also be a certain gap between the first arc section 21 and the second arc section 22. The first arc segment 21 and the second arc segment 22 in the embodiment of the present application can be formed by milling the pressing column, which simplifies the production process and improves the accuracy and consistency of the product. In some other embodiments, the first arc segment 21 and the second arc segment 22 can also be welded and fixed to one end of the pressing segment 1 after the pressing segment 1 is cast.

[0032] See also Figure 3As shown, in some optional embodiments, the first arc segment 21 and the second arc segment 22 are arranged at radial intervals along the pressing column, and the gap between the first arc segment 21 and the second arc segment 22 forms a circuit board guide groove 23, and the circuit board guide groove 23 is connected to the circuit board accommodating cavity 12. In the embodiment of the present application, since the first arc segment 21 and the second arc segment 22 are symmetrically arranged along the axial direction of the pressing section 1, the circuit board guide groove 23 formed by the first arc segment 21 and the second arc segment 22 at least partially exceeds the diameter of the pressing section 1, and the length of the circuit board guide groove 23 is set to be greater than the inner diameter of the ring formed by the first arc segment 21 and the second arc segment 22, so that the ring formed by the first arc segment 21 and the second arc segment 22 and the circuit board guide groove 23 can cooperate to adapt to the shape of the flexible circuit board 4. The flexible circuit board 4 may include a long extension plate and a circular plate fixed to the long extension plate. When the flexible circuit board 4 extends into the circuit board accommodating cavity 12 from the circuit board guide groove 23, the possibility of folding of the side of the circular plate can be reduced. At this time, the circuit board guide groove 23 provides a smooth transition path for the flexible circuit board, avoiding damage caused by direct bending or twisting, and making the extension process smoother. In the embodiment of the present application, the circuit board guide groove 23 is connected to the circuit board accommodating cavity 12, providing a clear guide path for the flexible circuit board 4. When the flexible circuit board 4 extends from the circuit board guide groove 23 into the circuit board accommodating cavity 12, the contour of the circuit board guide groove 23 serves as a guide to help the flexible circuit board accurately and quickly locate to the predetermined position. Furthermore, the axial symmetrical arrangement of the first arc segment 21 and the second arc segment 22 along the pressing section 1, as well as the reasonable design of the gap between them, enhance the stability and durability of the entire structure. This design not only improves the conduction reliability of the circuit, but also extends the service life of the equipment.

[0033] Preferably, the inner contour shape of the circuit board accommodating cavity 12 is the same as the inner contour shape of the circuit board guide groove 23. That is, when the flexible circuit board 4 extends from the circuit board guide groove 23 into the circuit board accommodating cavity 12, both sides of the circular plate of the flexible circuit board 4 can directly extend into the circuit board guide groove 23 without folding and finally enter the circuit board accommodating cavity 12. This method can protect the flexible circuit board 4 and reduce the possibility of damage to the flexible circuit board 4 due to folding.

[0034] See also Figure 2As shown, in some optional embodiments, the pressing section 1 includes a supporting section 13 and a receiving section 14 connected to the supporting section 13, the receiving section 14 encloses the circuit board receiving cavity 12, and the receiving section 14 is connected to the guide section 2, the pressing surface 11 is arranged on the side of the receiving section 14 close to the guide section 2; the pressing surface 11 extends along the radial direction of the pressing section 1, and the pressing surface 11 and the outer side wall of the guide section 2 are perpendicular to each other, the supporting section 13 can have a strong supporting force, the supporting section 13 is arranged on the side of the receiving section 14 away from the guide section 2, and when the press drives the pressing column to move, it can directly contact the supporting section 13. In the embodiment of the present application, the reason why the supporting performance of the supporting section 13 is strong may be that the supporting section 13 is set as a solid structure to improve the supporting stability. By providing the support section 13, the overall strength of the pressing column can be enhanced, and the solid structure of the support section 13 can more effectively transmit the pressure of the press, making the pressing process more uniform and efficient, and the stable support performance can further reduce the displacement or shaking of the pressing column during movement, thereby improving the accuracy and consistency of the pressing.

[0035] Preferably, a circuit board stopper is provided on the side of the support section 13 close to the accommodation section 14. By providing the circuit board stopper, the flexible circuit board 4 can be prevented from passing out from the side of the support section 13 away from the accommodation section 14, thereby causing damage to the flexible circuit board 4. In the embodiment of the present application, the support section 13 can be directly set as a solid structure, and the circuit board stopper can be regarded as a solid plate at this time. In some other embodiments, the support section 13 can also be provided with a through hole with a smaller diameter along its axis, and the through hole can prevent the flexible circuit board 4 from passing out.

[0036] In some other embodiments, the support section 13 may also be provided with a through hole communicating with the circuit board accommodating cavity 12 , and the through hole and the circuit board accommodating cavity 12 may be formed by one-time processing, thereby simplifying the processing process.

[0037] The present application also provides a pressing system, which may include the auxiliary pressing fixture described above, and the pressing system also includes a press. The pressing system of the present application includes the auxiliary pressing fixture of any of the above embodiments, and its structure and function are the same, which will not be repeated here.

[0038] The embodiment of the present application further provides a lamination method, which uses the above-mentioned auxiliary lamination fixture, and the lamination method may include the following steps:

[0039] S1: Insert the flexible circuit board 4 into the circuit board accommodating cavity 12 of the pressing column, and insert the guide section 2 into the pressing ring so that the pressing surface 11 is in contact with the top surface of the pressing ring, and the outer wall of the guide section 2 is in contact with the inner wall of the pressing ring. The flexible circuit board 4 can be inserted into the circuit board accommodating cavity 12 from the circuit board guide groove 23, and then the pressing surface 11 is aligned with the top surface of the pressing ring, and the outer wall of the guide section 2 is matched with the inner wall to complete the assembly. The pressing column and the steel shell 3, the pressing ring and the flexible circuit board 4 can be preliminarily assembled into a component, and the assembled component is placed in the press positioning fixture.

[0040] S2: Press down the pressing section 1, so that the pressing section 1 drives the guide section 2 to drive the pressing ring into the steel shell 3. After confirming that the assembly is placed in the specified position, press the press start button, the press head presses down, presses the pressing ring into place, and fixes the flexible circuit board 4.

[0041] It should be understood that before performing step S1, the flexible circuit board 4 can also be placed in the steel housing 3, and then the pressure ring is also placed in the steel housing 3; see Figure 4 As shown, the inner wall of the steel shell 3 may be provided with a circle of protrusions, which all protrude toward the axial direction of the steel shell 3 to form a protruding ring 31. The pressure ring can be placed with the protruding ring 31 as a reference. The protruding ring 31 provides a clear placement reference for the pressure ring, so that the pressure ring can be accurately and stably placed in the steel shell 3, avoiding poor pressing due to position offset. After the pressure ring is completely pressed into the steel shell 3 under the action of the press and the pressing column, the top surface of the pressure ring should be at the same level as the top surface of the protruding ring 31. Preferably, the pressure ring may include a guide section and a matching section connected to the guide section, the outer diameter of the guide section is smaller than the outer diameter of the matching section, and the guide section is arranged on the side of the matching section close to the inner bottom surface of the steel shell 3. The combined design of the guide section and the matching section avoids excessive extrusion and scratching of the inner wall of the steel shell 3 by the pressure ring during the pressing process, thereby protecting the integrity of the steel shell 3. By providing the guide section, the pressure ring can be partially extended into the inner wall of the convex ring 31 when it is just placed in the steel shell 3 and has not yet been pressed by the pressing column, thereby enhancing the stability of the pressure ring when placed there; and in the subsequent pressing process, the guide section can guide the pressure ring to gradually move downward along the inner wall of the convex ring 31 until it is completely pressed into the steel shell 3, thereby ensuring the accuracy and consistency of the pressing. It also provides a certain guiding effect for the subsequent pressing process.

[0042] In some optional embodiments, the axial length of the guide section 2 along the pressing column is shorter than the axial length of the pressure ring along the pressing column. When the guide section 2 assists the pressure ring to be pressed into the steel shell 3, a soft circuit board 4 is placed on the inner bottom surface of the steel shell 3. Setting the axial length of the guide column along the pressing column to be shorter than the axial length of the pressure ring along the pressing column can effectively prevent the bottom of the guide column from pressing onto the soft circuit board 4 and damaging the soft circuit board 4 during the pressing process of the press, thereby reducing the risk of damage to the soft circuit board 4 due to improper operation or equipment errors during the pressing process, and improving the safety and reliability of the pressing process. Furthermore, the shorter guide section 2 enables the pressure ring to apply pressure more directly to the inner bottom surface of the steel shell 3, thereby optimizing the pressure distribution and improving the pressing effect.

[0043] In some optional embodiments, the outer diameter of the guide section 2 is smaller than the inner diameter of the pressure ring, and the outer diameter of the pressing section 1 is larger than the outer diameter of the pressure ring. The pressing column as a whole can be a cylinder with a hole in the middle and a step milled out at the lower end, which can be regarded as the guide section 2. The size of the step should correspond to the required pressure ring so that the milled outer wall of the step can be inserted into the inner wall of the pressure ring. The upper end surface of the step (i.e., the pressing surface 11) has a limiting effect. During riveting, the upper end surface of the step acts on the top surface of the pressure ring, which can also be regarded as the step surface of the pressure ring. The pressure ring is pressed downward until the step surface of the pressure ring and the protrusion inside the steel shell 3 are in the same plane. Therefore, the outer diameter of the pressing section 1 should be set to be larger than the outer diameter of the pressure ring, but slightly smaller than the inner diameter of the steel shell 3. Due to the limiting of the upper end surface of the step, the pressure ring will not be pressed too deep or too shallow. Due to the hole in the middle of the pressing column, the flexible circuit board 4 is protected inside the hole and therefore will not be damaged.

[0044] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0045] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0046] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An auxiliary pressing fixture, characterized in that: It includes: A pressing column, the pressing column comprising a pressing section (1) and a guide section (2) arranged on the pressing section (1), the outer diameter of the pressing section (1) being larger than the outer diameter of the guide section (2), and a pressing surface (11) is arranged on a side of the pressing section (1) close to the guide section (2), the pressing surface (11) being used to fit against the top surface of a pressing ring, and the outer side wall of the guide section (2) being used to fit against the inner side wall of the pressing ring; The pressing section (1) has a circuit board accommodating cavity (12), and the circuit board accommodating cavity (12) passes through the guide section (2) along the axis of the pressing section (1).

2. The auxiliary pressing fixture according to claim 1, characterized in that: The guide section (2) comprises: A first arc segment (21), wherein the first arc segment (21) is fixed to the pressing segment (1); The second arc segment (22) is also fixed to the pressing segment (1), and the first arc segment (21) and the second arc segment (22) are symmetrically arranged along the axis of the pressing segment (1).

3. The auxiliary pressing fixture according to claim 2, characterized in that: The first arc segment (21) and the second arc segment (22) are arranged at intervals along the radial direction of the pressing column, and the gap between the first arc segment (21) and the second arc segment (22) forms a circuit board guide groove (23), and the circuit board guide groove (23) is connected to the circuit board accommodating cavity (12).

4. The auxiliary pressing fixture according to claim 3, characterized in that: The inner contour shape of the circuit board accommodating cavity (12) is the same as the inner contour shape of the circuit board guiding groove (23).

5. The auxiliary pressing fixture according to claim 1, characterized in that: The pressing section (1) comprises a supporting section (13) and a receiving section (14) connected to the supporting section (13), the receiving section (14) enclosing the circuit board receiving cavity (12), and the receiving section (14) is connected to the guiding section (2), and the pressing surface (11) is arranged on a side of the receiving section (14) close to the guiding section (2); The pressing surface (11) extends along the radial direction of the pressing section (1), and the pressing surface (11) and the outer side wall of the guiding section (2) are perpendicular to each other.

6. The auxiliary pressing fixture according to claim 5, characterized in that: A circuit board limiting portion is provided on one side of the supporting section (13) close to the accommodating section (14).

7. A pressing system, comprising the auxiliary pressing fixture according to any one of claims 1 to 6, characterized in that: The pressing system further comprises a press.

8. A pressing method, using the auxiliary pressing fixture according to any one of claims 1 to 6, characterized in that: The pressing method comprises the following steps: Insert the flexible circuit board (4) into the circuit board accommodating cavity (12) of the pressing column, and insert the guide section (2) into the pressing ring so that the pressing surface (11) is in contact with the top surface of the pressing ring, and the outer side wall of the guide section (2) is in contact with the inner side wall of the pressing ring; The pressing section (1) is pressed downward, so that the pressing section (1) drives the guide section (2) to drive the pressing ring to press into the steel shell (3).

9. The lamination method according to claim 8, characterized in that: The length of the guide section (2) along the axial direction of the press-fit column is smaller than the length of the pressure ring along the axial direction of the press-fit column.

10. The lamination method according to claim 8, characterized in that: The outer diameter of the guide section (2) is smaller than the inner diameter of the pressure ring, and the outer diameter of the pressing section (1) is larger than the outer diameter of the pressure ring.

Images