An auxiliary press fixture, press system, and press method

Abstract

The application relates to an auxiliary pressing clamp, a pressing system and a pressing method, which comprise a pressing column, the pressing column comprising a pressing section and a guide section arranged at the pressing section, the outer diameter of the pressing section being larger than that of the guide section, one side of the pressing section close to the guide section being provided with a pressing surface used for being attached to the top surface of a pressing ring, and the outer side wall of the guide section being 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. By extending the guide section 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 of the pressing column sliding relative to the pressing ring in the pressing process is effectively reduced, the fixing of the relative position between the pressing ring and the pressing column can also reduce the possibility of the damage of the soft circuit board, and the technical problem that if the position of a pressing head is offset in the horizontal direction during pressing in the prior art, the product may be unqualified is solved.

Description

Technical Field

[0001] This application relates to the field of multi-part sensor assembly, specifically to an auxiliary pressing fixture, pressing system, and pressing method. Background Technology

[0002] In the production of automotive pressure and temperature sensors, pressure rings need to be press-fitted to secure the circuit board, ensuring the consistency of the entire product and guaranteeing its proper use in vehicle manufacturing. Currently, the most common method is manual material handling followed by press-fitting.

[0003] In related technologies, the operator inserts the pressure ring through the flexible circuit board and places it within a steel housing. The assembly of the pressure ring and steel housing is then positioned in the press's positioning fixture. The press descends and contacts the pressure head, which presses the pressure ring into place, thus securing the circuit board. However, during the pressing process, because the outer diameter of the pressure head is smaller than the inner diameter of the steel housing, the pressure head's position may shift horizontally within the steel housing. This shift could damage the flexible circuit board or cause the pressure head to press the pressure ring too deeply in some areas and too shallowly in others, resulting in defective products. Summary of the Invention

[0004] This application provides an auxiliary pressing fixture, pressing system, and pressing method, which can solve the technical problems in the related art where if the position of the pressing head is offset horizontally during pressing, it may damage the flexible circuit board, or the pressing head may press the pressure ring too deeply in some positions and too shallowly in others, resulting in product defects.

[0005] In a first aspect, embodiments of this application provide an auxiliary pressing fixture, comprising: a pressing column, the pressing column including a pressing section and a guide section disposed on the pressing section, the outer diameter of the pressing section being larger than the outer diameter of the guide section, and the pressing section having a pressing surface on the side near the guide section, the pressing surface being used to fit against the top surface of a pressing ring, and the outer side wall of the guide section being used to fit against the inner side wall of the pressing ring; the pressing section having a circuit board receiving cavity, the circuit board receiving cavity penetrating the guide section along the axis of the pressing section.

[0006] In conjunction with the first aspect, in one embodiment, the guide segment includes: a first arc-shaped segment fixed to the pressing segment; and a second arc-shaped segment also fixed to the pressing segment, wherein the first arc-shaped segment and the second arc-shaped segment are symmetrically arranged along the axis of the pressing segment.

[0007] In conjunction with the first aspect, in one embodiment, the first arc segment and the second arc segment are arranged radially at intervals along the pressing column, and the gap between the first arc segment and the second arc segment forms a circuit board guide groove, the circuit board guide groove being in communication with the circuit board receiving cavity.

[0008] In conjunction with the first aspect, in one embodiment, the inner contour shape of the circuit board receiving cavity is the same as the inner contour shape of the circuit board guide groove.

[0009] In conjunction with the first aspect, in one embodiment, the pressing section includes a support section and a receiving section connected to the support section, the receiving section forming the circuit board receiving cavity and the receiving section connecting to the guide section, the pressing surface being disposed on the side of the receiving section near the guide section; the pressing surface extending radially along the pressing section and the pressing surface being perpendicular to the outer side wall of the guide section.

[0010] In conjunction with the first aspect, in one embodiment, the support section is provided with a circuit board limiting part on the side near the receiving section.

[0011] Secondly, embodiments of this application provide a pressing system, which includes the aforementioned auxiliary pressing fixture, and the pressing system further includes a press.

[0012] Thirdly, this application provides a pressing method using the aforementioned auxiliary pressing fixture. The pressing method includes the following steps: inserting a flexible circuit board into the circuit board receiving cavity of the pressing post, and inserting a 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 side wall of the guide section is in contact with the inner side wall of the pressing ring; pressing down the pressing section so that the pressing section drives the guide section to drive the pressing ring to press into the steel housing.

[0013] In conjunction with the third aspect, in one embodiment, the length of the guide segment along the axial direction of the pressing column is less than the length of the pressure ring along the axial direction of the pressing column.

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

[0015] The beneficial effects of the technical solutions provided in this application include:

[0016] By extending the guide section into the inner ring of the pressure ring, the pressing surface is made to fit against the top surface of the pressure ring, and the outer side wall of the guide section is made to fit against the inner side wall of the pressure ring. This effectively reduces the possibility of the pressing post sliding relative to the pressure ring during the pressing process. Furthermore, the flexible circuit board can be inserted into the circuit board receiving cavity before pressing. The fixed relative position between the pressure ring and the pressing post can also reduce the possibility of damage to the flexible circuit board. This solves the technical problem in related technologies where the position of the pressing head may shift in the horizontal direction during pressing, which may lead to product defects. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the auxiliary pressing fixture provided in the embodiments of this application;

[0019] Figure 2 A cross-sectional view of the compression column provided in an embodiment of this application;

[0020] Figure 3 A bottom view of the compression column provided in the embodiments of this application;

[0021] Figure 4 This is a three-dimensional structural diagram of a flexible circuit board mounted on a steel housing.

[0022] In the picture:

[0023] 1. Pressing section; 11. Pressing surface; 12. Circuit board receiving cavity; 13. Support section; 14. Receiving section;

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

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

[0026] 4. Flexible circuit board. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0028] This application provides an auxiliary pressing fixture that solves the technical problems in related technologies where, during pressing, a horizontal offset of the pressing head may damage the flexible circuit board, or the pressing head may press the pressure ring too deeply in some positions and too shallowly in others, leading to product defects.

[0029] See Figure 1 The diagram illustrates an auxiliary pressing fixture provided in this application embodiment. It may include a pressing column, comprising a pressing section 1 and a guide section 2 disposed on the pressing section 1. The outer diameter of the pressing section 1 is larger than the outer diameter of the guide section 2. The pressing section 1 has a pressing surface 11 on the side near the guide section 2, the pressing surface 11 being used to adhere to the top surface of the pressing ring, and the outer side wall of the guide section 2 being used to adhere to the inner side wall of the pressing ring. The pressing section 1 has a circuit board accommodating cavity 12, which extends 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. The circuit board accommodating cavity 12 may be opened after the pressing column and guide section 2 are formed. Specifically, a step may be milled at one end of the pressing column, the step size corresponding to the inner diameter of the required pressing ring. It should be understood that the diameter of the pressing section 1 should be set slightly smaller than the inner diameter of the steel housing 3 so that the pressing section 1 can extend into the steel housing 3.

[0030] In this embodiment, by extending the guide section 2 into the inner ring of the pressure ring, the pressing surface 11 is attached to the top surface of the pressure ring, and the outer wall of the guide section 2 is attached to the inner wall of the pressure ring. The attachment of the outer wall of the guide section 2 to the inner wall of the pressure ring provides a certain guiding effect for the pressing process, effectively reducing 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 the pressing plane. When the press drives the pressing column to press down, if the relative position of the pressing column and the steel shell 3 in the horizontal direction does not shift, the pressing column can also move along the pressing surface. The axial movement of the pressing column ensures consistent pressing depth of the pressing ring at all positions. Furthermore, the flexible circuit board 4 can extend into the circuit board receiving cavity 12 before pressing down. The fixed relative position between the pressing ring and the pressing column reduces the possibility of the pressing column moving horizontally and damaging the flexible circuit board 4. During pressing, a portion of the pressing surface 11 can also cooperate with the limiting ring fixed to the inner wall of the steel housing 3 to limit the pressing depth of the pressing column. This solves the technical problem in related technologies where product defects may occur if the position of the pressing head shifts during pressing.

[0031] In some optional embodiments, the guide segment 2 may include: a first arc-shaped segment 21, fixed to the pressing segment 1; and a second arc-shaped segment 22, also fixed to the pressing segment 1, wherein the first arc-shaped segment 21 and the second arc-shaped segment 22 are symmetrically arranged along the axis of the pressing segment 1. The first arc-shaped segment 21 and the second arc-shaped segment 22 can together form a complete ring, and the ring may have a certain thickness along the radial direction of the pressing column to enhance the strength of the guide segment 2. During the pressing process, this enhanced structure can better resist external pressure and internal stress, ensuring smooth pressing and improving the structural stability after pressing. The outer diameter of the ring is smaller than the outer diameter of the pressing segment 1, allowing the flexible circuit board 4 to pass through the ring into the circuit board receiving cavity 12. Optionally, there may also be a certain gap between the first arc-shaped segment 21 and the second arc-shaped segment 22. In this embodiment, both the first arc segment 21 and the second arc segment 22 can be formed by milling the pressing column, which simplifies the production process and improves the precision 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 Figure 3As shown, in some optional embodiments, the first arc segment 21 and the second arc segment 22 are arranged radially at 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, which is connected to the circuit board receiving cavity 12. In this embodiment, since the first arc segment 21 and the second arc segment 22 are symmetrically arranged along the axial direction of the pressing segment 1, the circuit board guide groove 23 formed by the first arc segment 21 and the second arc segment 22 passes through the diameter of the pressing segment 1 at least partially. 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 receiving cavity 12 from the circuit board guide groove 23, the possibility of the side of the circular plate folding 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 insertion process smoother. In this embodiment, the circuit board guide groove 23 communicates with the circuit board receiving cavity 12, providing a clear guiding path for the flexible circuit board 4. When the flexible circuit board 4 extends into the circuit board receiving cavity 12 from the circuit board guide groove 23, the contour of the circuit board guide groove 23 serves as a guide, helping the flexible circuit board to accurately and quickly position itself at the predetermined location. Furthermore, the symmetrical arrangement of the first arc-shaped segment 21 and the second arc-shaped segment 22 along the axial direction of the pressing segment 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 conductivity reliability of the circuit but also extends the service life of the equipment.

[0033] Preferably, the inner contour shape of the circuit board receiving cavity 12 is the same as the inner contour shape of the circuit board guide groove 23. That is, during the process of the flexible circuit board 4 extending from the circuit board guide groove 23 into the circuit board receiving cavity 12, both sides of the flexible circuit board 4 can directly extend into the circuit board guide groove 23 without folding and finally enter the circuit board receiving 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 Figure 2As shown, in some optional embodiments, the pressing section 1 includes a support section 13 and a receiving section 14 connected to the support section 13. The receiving section 14 forms the circuit board receiving cavity 12 and is connected to the guide section 2. The pressing surface 11 is located on the side of the receiving section 14 near the guide section 2. The pressing surface 11 extends radially along the pressing section 1 and is perpendicular to the outer wall of the guide section 2. The support section 13 can have strong supporting force. The support section 13 is located on the side of the receiving section 14 away from the guide section 2, so that it can directly contact the pressing column when the press drives it to move. In this embodiment, the reason for the strong supporting performance of the support section 13 may be that the support section 13 is set as a solid structure to improve the supporting stability. By setting 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. Furthermore, the stable support performance can further reduce the displacement or shaking of the pressing column during movement, thereby improving the accuracy and consistency of pressing.

[0035] Preferably, the support segment 13 has a circuit board limiting part on the side near the receiving segment 14. By setting the circuit board limiting part, the flexible circuit board 4 can be prevented from passing through the support segment 13 away from the receiving segment 14, thereby preventing damage to the flexible circuit board 4. In this embodiment, the support segment 13 can be directly set as a solid structure, and the circuit board limiting part can be regarded as a solid plate. In some other embodiments, the support segment 13 can also have a through hole with a small diameter along its axis, which can prevent the flexible circuit board 4 from passing through.

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

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

[0038] This application also provides a pressing method using the aforementioned auxiliary pressing fixture. The pressing method may include the following steps:

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

[0040] S2: Press down the pressing section 1, causing the pressing section 1 to drive the guide section 2 to press the pressure ring into the steel housing 3. After confirming that the assembly is placed in the designated position, press the press start button, and the press head will press down to press the pressure ring into place, thereby fixing the flexible circuit board 4.

[0041] It should be understood that before performing step S1, the flexible circuit board 4 can be placed inside the steel housing 3, and then the pressure ring can also be placed inside the steel housing 3; see [link to relevant documentation]. Figure 4 As shown, the inner wall of the steel shell 3 may be provided with a ring of protrusions, all of which protrude towards the axis of the steel shell 3 to form a convex ring 31. The pressure ring can be placed with this convex ring 31 as a reference. The convex ring 31 provides a clear placement reference for the pressure ring, allowing it to be accurately and stably placed inside the steel shell 3, avoiding poor pressing due to positional misalignment. After the pressure ring is fully pressed into the steel shell 3 under the action of the press and pressing column, the top surface of the pressure ring should be at the same level as the top surface of the convex ring 31. Preferably, the pressure ring may include a guide section and a mating section connected to the guide section. The outer diameter of the guide section is smaller than the outer diameter of the mating section. The guide section is located on the side of the mating section near the inner bottom surface of the steel shell 3. The combined design of the guide section and the mating section avoids excessive compression and scratching of the inner wall of the steel shell 3 during the pressing process, protecting the integrity of the steel shell 3. By incorporating a guide section, the pressure ring can extend partially into the inner wall of the convex ring 31 even when it is first placed inside the steel housing 3 and has not yet been pressed by the pressing column, enhancing the stability of the pressure ring at that position. Furthermore, during the subsequent pressing process, the guide section can guide the pressure ring to gradually move downwards along the inner wall of the convex ring 31 until it is fully pressed into the steel housing 3, thus ensuring the accuracy and consistency of the pressing process. It also provides a certain guiding function for subsequent pressing processes.

[0042] In some optional embodiments, the length of the guide segment 2 along the axial direction of the pressing column is less than the length of the pressure ring along the axial direction of the pressing column. When the guide segment 2 assists the pressure ring in pressing into the steel housing 3, a flexible circuit board 4 is placed on the inner bottom surface of the steel housing 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 against the flexible circuit board 4 during the pressing process, thus reducing the risk of damage to the flexible circuit board 4 due to improper operation or equipment error during the pressing process, and improving the safety and reliability of the pressing process. Furthermore, the shorter guide segment 2 allows the pressure ring to apply pressure more directly to the inner bottom surface of the steel housing 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 can be a cylinder with a hole in the middle and a step milled at the lower end. This step can be regarded as the guide section 2. The size of the step should correspond to the pressure ring to be used, so that the outer wall of the milled step can fit into the inner wall of the pressure ring. The upper end face of the step (i.e., the pressing surface 11) also has a limiting function. During riveting, the upper end face 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 down until the step surface of the pressure ring and the protrusion inside the steel shell 3 are on 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 function of the upper end face of the step, the pressure ring will not be pressed in too deeply or too shallowly. Because of the hole in the middle of the pressing column, the flexible circuit board 4 is protected inside the hole and will not be damaged.

[0044] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this 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 used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An assist press fixture, characterized by, It comprises: The pressing column comprises a pressing section (1) and a guide section (2) arranged on the pressing section (1), the outer diameter of the pressing section (1) is larger than that of the guide section (2), and the pressing surface (11) is arranged on the side of the pressing section (1) 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) which penetrates the guide section (2) along the axis of the pressing section (1); The guide section (2) comprises a first arc-shaped section (21) and a second arc-shaped section (22); The first arc-shaped section (21) and the second arc-shaped section (22) are arranged at intervals along the radial direction of the pressing column, and the gap between the first arc-shaped section (21) and the second arc-shaped section (22) forms a circuit board guide groove (23), which communicates with the circuit board accommodating cavity (12); The inner contour shape of the circuit board accommodating cavity (12) is the same as that of the circuit board guide groove (23); The length of the guide section (2) in the axial direction of the pressing column is less than the length of the pressing ring in the axial direction of the pressing column; 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.

2. The aid press fixture according to claim 1, wherein The guide section (2) comprises: The first arc-shaped section (21) is fixed to the pressing section (1); The second arc-shaped section (22) is also fixed to the pressing section (1), and the first arc-shaped section (21) and the second arc-shaped section (22) are symmetrically arranged along the axis of the pressing section (1).

3. The auxiliary pressing clamp according to claim 1, wherein: The pressing section (1) comprises a support section (13) and an accommodating section (14) connected to the support section (13), the accommodating section (14) forms the circuit board accommodating cavity (12), and the accommodating section (14) is connected to the guide section (2), and the pressing surface (11) is arranged on the side of the accommodating section (14) close to the guide section (2).

4. The auxiliary pressing clamp according to claim 3, wherein: The support section (13) is provided with a circuit board limiting part on the side close to the accommodating section (14).

5. A press system comprising the auxiliary press clamp according to any one of claims 1 to 4, characterized in that The pressing system further comprises a pressing machine.

6. A press-bonding method using the auxiliary press jig according to any one of claims 1 to 4, characterized by The pressing method comprises the following steps: Inserting the soft circuit board (4) into the circuit board accommodating cavity (12) of the pressing column, and inserting the guide section (2) into the pressing ring, so that the pressing surface (11) fits the top surface of the pressing ring, and the outer side wall of the guide section (2) fits the inner side wall of the pressing ring; Pressing down the pressing section (1) to drive the pressing section (1) and the guide section (2) to press the pressing ring into the steel shell (3).

7. The pressing method according to claim 6, wherein: The outer diameter of the guide section (2) is smaller than the inner diameter of the pressing ring, and the outer diameter of the pressing section (1) is larger than the outer diameter of the pressing ring.

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