FPC and OSA welding jig

Abstract

This invention discloses an FPC and OSA welding fixture, comprising: a base with a receiving cavity; a positioning member adapted to the receiving cavity and positioned within it, the positioning member having a first end for placing a first workpiece and a second end for positioning a second workpiece; and a pressure cap disposed on the base, one end of which is rotatably connected to the base, the pressure cap having a first clearance hole for exposing the welding portion of the workpiece, and the pressure cap being able to flip to press and fix the first workpiece. By using the pressure cap and positioning member, the FPC is adaptively leveled, ensuring its flatness and precise alignment with the OSA device, improving welding performance, preventing incomplete or broken welds, enhancing clamping consistency and production efficiency, and meeting the requirements of high-precision automated mass production.

Description

Technical Field

[0001] This invention belongs to the field of precision electronic welding tooling technology, specifically relating to an FPC and OSA welding fixture. Background Technology

[0002] In the production of products such as optical communication modules, it is necessary to solder an integrated PCBA substrate with a pre-fabricated FPC to an OSA workpiece. During soldering, the FPC is prone to warping and deformation, making it difficult to accurately align the solder holes on the FPC with the solder positions on the OSA product, thus affecting the accuracy of the soldering position.

[0003] Traditional welding fixtures are difficult to simultaneously limit and align the integrated FPC substrate and OSA devices on the PCBA, and lack local flattening and fixing methods for the FPC. During the welding process, the FPC is prone to warping and deformation, resulting in inaccurate welding positions, which makes it difficult to meet the clamping requirements of high-precision automated welding. Summary of the Invention

[0004] The purpose of this invention is to provide an FPC and OSA welding fixture to solve the problems of existing fixtures being unable to achieve synchronous and accurate alignment of the integrated FPC substrate on the PCBA and OSA devices, lacking FPC local flattening function, resulting in FPC warping and deformation during welding, and inaccurate welding position.

[0005] This invention is achieved using the following technical solution:

[0006] This invention provides an FPC and OSA welding fixture, comprising: a base having a receiving cavity; a positioning member adapted to the receiving cavity and positioned within the receiving cavity, the positioning member having a first end for placing a first workpiece and a second end for positioning a positioning structure for fixing a second workpiece; and a pressure cap disposed on the base, one end of the pressure cap being rotatably connected to the base, the pressure cap having a first clearance hole for exposing the welding portion of the workpiece, and the pressure cap being able to flip to press and fix the first workpiece.

[0007] In one possible implementation, the FPC and OSA welding fixture may further include a cover plate fixed to the bottom of the pressure cap, the cover plate having a second clearance hole, the first clearance hole completely covering the second clearance hole.

[0008] In one possible implementation, the base may also be provided with a pin, and one end of the cover is provided with a pin hole, through which a pin passes and through the pin to hinge the cover to the base.

[0009] In one possible implementation, the bottom of the positioning member may have at least two hollowed-out cylindrical holes, and springs are filled in the cylindrical holes.

[0010] In one possible implementation, the upper end face of the positioning member may also be provided with a clearance groove, which is used to avoid electronic components on the first workpiece.

[0011] In one possible implementation, the first workpiece can be a prefabricated FPC integrated PCBA substrate; the second workpiece can be an OSA workpiece.

[0012] As an optional implementation, the FPC and OSA welding fixture may further include a moving platform, with the base fixed on the moving platform, and the moving platform controlled by the welding machine to move the base.

[0013] In one possible implementation, the bottom of the receiving cavity may be provided with a recessed hole corresponding to the position and size of the cylindrical hole.

[0014] In one possible implementation, the base may be provided with multiple workstations, and each workstation may be provided with a set of positioning components and pressure caps.

[0015] In one possible implementation, the spring can be configured to deform under compression to provide an elastic preload, allowing the positioning element to adapt to a second workpiece of different heights.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] By incorporating a pressure cap and positioning components, the FPC is adaptively leveled, ensuring its flatness and precise alignment with the OSA device. This improves welding performance, eliminates cold solder joints and breaks, enhances clamping consistency and production efficiency, and meets the demands of high-precision automated mass production. Furthermore, the cover plate features a second clearance hole, exposing only the welding area to insulate the non-welding areas of the FPC from heat, preventing welding sputtering from burning the FPC and oxidation of the OSP plating. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the FPC and OSA welding fixture of the present invention;

[0019] Figure 2 This is a partial structural diagram of the FPC and OSA welding fixture of the present invention. Figure 1 ;

[0020] Figure 3 This is a partial structural diagram of the FPC and OSA welding fixture of the present invention. Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the base structure of the present invention;

[0022] Figure 5 This is an exploded view of the FPC and OSA welding fixture of the present invention;

[0023] Figure 6 and Figure 7 This is a schematic diagram of the positioning component of the present invention.

[0024] In the diagram, 100 is the base; 110 is the receiving cavity; 120 is the pin; 130 is the recess; 200 is the positioning component; 210 is the positioning hole; 220 is the clearance groove; 230 is the cylindrical hole; 300 is the pressure cap; 310 is the first clearance hole; 320 is the pin hole; 400 is the cover plate; 410 is the second clearance hole; 500 is the spring; 600 is the moving platform; 10 is the first workpiece; 11 is the FPC; 12 is the PCBA integrated substrate; 20 is the second workpiece; and 21 is the OSA workpiece. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] Reference Figure 1 This invention provides a welding fixture for FPC and OSA, which may include a base 100, a positioning member 200, and a pressure cap 300. The base 100 has a receiving cavity 110, and the size and shape of the positioning member 200 are adapted to the receiving cavity 110, with the positioning member 200 being positioned and fixed within the receiving cavity 110. A first end of the positioning member 200 is used to place a first workpiece 10, and a second end of the positioning member 200 has a positioning hole 210 for fixing a second workpiece 20. The pressure cap 300 is disposed on the upper surface of the base 100, and one end of the pressure cap 300 is rotatably connected to the base 100. The pressure cap 300 has a first clearance hole 310 for allowing the workpiece to protrude. With this structure, the pressure cap 300 can be flipped and closed to press and fix the first workpiece 10, preventing warping and deformation of the FPC, and ensuring precise alignment of the welding holes on the FPC with the welding positions of the OSA product, thus avoiding inaccurate welding positions.

[0027] Reference Figure 2 and Figure 3In some embodiments, the first workpiece 10 can be a pre-fabricated FPC 11 integrated PCBA substrate 12, and the second workpiece 20 can be an OSA workpiece 21. The FPC is pre-attached and fixed to the PCBA board surface. The FPC is soft and easily deformed by heat. By setting a flip-up pressure cover 300 and fixing a cover plate 400 at the bottom of the pressure cover 300, both the cover plate 400 and the pressure cover 300 are provided with clearance holes to expose the positions to be soldered. The cover plate 400 can press and fix the FPC. On the other hand, a positioning groove or positioning hole 210 is provided on the positioning member 200 to place and limit the OSA product in the positioning hole 210, and then the FPC and OSA are soldered. It should be noted that the purpose of this application in preferably providing both the cover plate 400 and the pressure cap 300 is as follows: In order to ensure the pressing effect, the pressure cap 300 is usually made relatively thick, so the first clearance hole needs to be made larger to facilitate the welding head to enter for welding. The main function of the cover plate 400 is to press and fix the FPC to prevent the FPC from warping and deforming due to heat during the welding process. Therefore, the cover plate 400 can be made relatively thin, and the second clearance hole on the cover plate 400 only needs to expose the part to be welded.

[0028] Reference Figure 4 The base 100 can be a plate-like structure, and the receiving cavity 110 can be set on the upper end surface of the base 100. The shape of the receiving cavity 110 is adapted to the shape of the positioning member 200, so that the positioning member 200 can be stably and securely assembled in the receiving cavity 110, preventing the positioning member 200 from shifting during the welding process. The base 100 is also provided with a pin 120, which is used to cooperate with the pressure cover 300 to realize the rotational connection of the pressure cover 300.

[0029] Reference Figure 5 The welding fixture, when disassembled, can include components such as a base 100, a positioning element 200, a pressure cap 300, a cover plate 400, and a spring 500. The pressure cap 300, base 100, pin, and cover plate 400 can form a flipping and pressing mechanism to press down the FPC. Both the FPC and OSA are placed on the positioning element 200, which has a limiting hole for limiting and fixing the OSA.

[0030] Reference Figure 6 and Figure 7The positioning component 200 may include a positioning hole 210, a clearance groove 220, and a cylindrical hole 230. The first end of the positioning component 200 is used to place the first workpiece 10, and the positioning hole 210 at the second end is used to limit and fix the second workpiece 20. The upper surface of the positioning component 200 is also provided with a clearance groove 220, which is used to avoid electronic components on the first workpiece 10. The bottom of the positioning component 200 is provided with at least two hollowed-out cylindrical holes 230, each containing a spring 500. The spring 500 provides elastic fit, allowing it to adapt to products of different heights, thereby improving product compatibility.

[0031] like Figure 4 As shown, the base 100 according to an embodiment of the present invention may be provided with a receiving cavity 110. The receiving cavity 110 may be formed on the upper end surface of the base 100. The size and shape of the receiving cavity 110 may be configured to adapt to the positioning member 200, so that the positioning member 200 can be limited and assembled in the receiving cavity 110. In some embodiments, the receiving cavity 110 may limit the circumferential movement of the positioning member 200, thereby maintaining the stability of the position of the positioning member 200 during the pressing of the cover 300. According to one embodiment, the base 100 may also be provided with a pin 120. The pin 120 may be disposed on the upper end surface of the base 100 for engaging with a pin hole 320 at one end of the cover 300 to realize a rotatable connection between the cover 300 and the base 100.

[0032] like Figure 5 As shown, according to an embodiment of the present invention, the pressure cap 300 can be disposed on the upper end surface of the base 100. One end of the pressure cap 300 can be hinged to the base 100 via a pin and a pin shaft 120, thereby forming a flip-up pressure cap structure. The pressure cap 300 can be provided with a first clearance hole 310, which can be used to expose the position of the workpiece to be welded, so that the welding head can act on the welding area through the first clearance hole 310. In some embodiments, a cover plate 400 can also be fixed to the bottom of the pressure cap 300. The cover plate 400 can be provided with a second clearance hole 410, and the first clearance hole 310 can completely cover the second clearance hole 410, that is, the second clearance hole 410 can be located within the projection range of the first clearance hole 310 in the thickness direction of the pressure cap 300. The pressure cap 300 and the cover plate 400 can press and fix the FPC by pressing, avoiding warping and deformation of the FPC during the welding process, and ensuring that the welding holes on the FPC are precisely aligned with the welding positions of the OSA product, avoiding inaccurate welding positions.

[0033] like Figure 6 and Figure 7As shown, according to an embodiment of the present invention, the first end of the positioning member 200 can be used to place the first workpiece 10, and the second end of the positioning member 200 can be provided with a positioning hole 210, which can be used to limit and fix the second workpiece 20, placing and limiting the OSA product in the positioning hole 210. In some embodiments, the upper end surface of the positioning member 200 can also be provided with a clearance groove 220, which can be used to avoid electronic components on the first workpiece 10, preventing interference to the electronic components during pressing or placement. According to one embodiment, the bottom of the positioning member 200 can be provided with at least two hollowed-out cylindrical holes 230, and springs 500 can be filled in the cylindrical holes 230, which can provide elastic fit for the positioning member 200. Optionally, the bottom of the receiving cavity 110 may be provided with a recess 130 corresponding to the position and size of the cylindrical hole 230. The recess 130 can provide a receiving space for the spring 500 filled in the cylindrical hole 230, so that the positioning member 200 can be displaced along the depth direction of the receiving cavity 110 when it is pressed.

[0034] In some embodiments, the spring 500 can be configured to deform under pressure to provide an elastic preload, enabling the positioning member 200 to adapt to second workpieces 20 of different heights, thereby improving product compatibility. When the pressure cap 300 flips and closes, the spring 500 at the bottom of the positioning member 200 can deform under pressure to provide an elastic preload, achieving flexible clamping and fixing. According to an embodiment of the present invention, the first workpiece 10 can be a prefabricated FPC 11 integrated PCBA substrate 12, and the second workpiece 20 can be an OSA workpiece 21, that is, the welding fixture of the present invention can be applied to the butt welding of prefabricated FPCs and OSA optical devices on a PCBA.

[0035] When using the aforementioned FPC and OSA soldering fixture, the operation can be performed as follows: During operation, the prefabricated FPC integrated PCBA substrate can be placed as the first workpiece on the first end of the positioning component, either manually or automatically. Then, the OSA workpiece is placed as the second workpiece in the positioning hole of the positioning component. The positioning hole limits and fixes the OSA workpiece, thus completing the initial positioning. This process ensures precise alignment between the soldering holes of the FPC and the soldering positions of the OSA product. In some embodiments, the individual wires of the OSA product can be passed through the soldering holes of the FPC to further assist in aligning the soldering holes and soldering positions, preventing inaccurate soldering positions.

[0036] After initial positioning, the pressure cap can be flipped and closed, rotating around its rotatable end connected to the base to the closed position. During the flipping and closing process, a pin guides and limits the pressure cap, ensuring precise downward pressure. Once closed, the pressure cap and the cover plate fixed to its bottom clamp and secure the FPC, preventing warping and ensuring precise alignment between the welding holes on the FPC and the welding positions on the OSA product. Because both the pressure cap and the cover plate have clearance holes, the areas requiring welding can be exposed through the first and second clearance holes, allowing welding equipment to perform welding operations on the exposed areas.

[0037] During the pressing down of the pressure cap, the spring at the bottom of the positioning component can deform under pressure, thereby providing elastic preload and achieving flexible clamping and fixing. According to one embodiment, since the spring is located within a hollow cylindrical hole at the bottom of the positioning component, the positioning component can generate a corresponding displacement when the spring deforms under pressure, thus adapting to OSA products of different heights and improving product compatibility. The concave hole at the bottom of the receiving cavity corresponds in position and size to the cylindrical hole, providing clearance for the spring's deformation.

[0038] After clamping, the entire fixture can be automatically and precisely positioned along with the moving platform 600. The base is fixed on the moving platform 600, which is controlled by the welding machine to move the base, cooperating with the automatic welding equipment to complete the precise alignment and welding of the OSA workpiece and the FPC on the PCBA. (Refer to...) Figures 1 to 3 During the welding process, the pressure cap and cover plate press and fix the FPC, and the cover plate ensures the flatness of the welding area, which can effectively avoid problems such as poor welding, misalignment, and FPC peeling, and is suitable for automated continuous mass production operations.

[0039] In some embodiments, multiple workstations can be set on a base, and each workstation is equipped with a set of components such as a pressure cap, a cover plate, and positioning parts. Since the welding head of the automatic welding equipment is movable, the fixture can sequentially weld products at each workstation by moving along the platform, thereby adapting to the automated welding equipment assembly line operation and improving clamping consistency and production efficiency. (Refer to...) Figures 4 to 7 Those skilled in the art can make adaptive adjustments to the assembly relationship and operation sequence of the above-mentioned components according to the actual welding conditions, as long as the synchronous positioning and alignment of the first workpiece and the clamping and fixing of the FPC can be achieved.

[0040] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A welding fixture for FPC and OSA, characterized in that, include: The base has a receiving cavity; a positioning member is adapted to the receiving cavity and is positioned within the receiving cavity, the first end of the positioning member is used to place a first workpiece, and the second end of the positioning member is provided with a positioning structure for limiting and fixing a second workpiece; and a pressure cover is disposed on the base, and one end of the pressure cover is rotatably connected to the base, the pressure cover is provided with a first clearance hole for exposing the welding part of the workpiece, and the pressure cover can be flipped to press and fix the first workpiece.

2. The FPC and OSA welding fixture according to claim 1, characterized in that, It also includes a cover plate, which is fixed to the bottom of the pressure cap, and the cover plate is provided with a second clearance hole, which completely covers the second clearance hole.

3. The FPC and OSA welding fixture according to claim 1, characterized in that, The base is also provided with a pin, and one end of the cover is provided with a pin hole. A pin passes through the pin hole and the pin to hinge the cover to the base.

4. The FPC and OSA welding fixture according to claim 1, characterized in that, The bottom of the positioning component has at least two hollowed-out cylindrical holes, and springs are filled in the cylindrical holes.

5. The FPC and OSA welding fixture according to claim 1, characterized in that, The upper end face of the positioning component is also provided with a clearance groove, which is used to avoid electronic components on the first workpiece.

6. The FPC and OSA welding fixture according to claim 1, characterized in that, The first workpiece is a prefabricated FPC integrated PCBA substrate; the second workpiece is an OSA workpiece.

7. The FPC and OSA welding fixture according to claim 1, characterized in that, It also includes a mobile platform, on which the base is fixed, and the mobile platform drives the base to move.

8. The FPC and OSA welding fixture according to claim 4, characterized in that, The bottom of the receiving cavity is provided with a recessed hole corresponding to the position and size of the cylindrical hole.

9. The FPC and OSA welding fixture according to claim 1, characterized in that, The base is provided with multiple workstations, and each workstation is provided with a set of positioning components and pressure caps.

10. The FPC and OSA welding fixture according to claim 4, characterized in that, The spring is configured to deform under compression to provide an elastic preload, allowing the positioning element to adapt to second workpieces of different heights.

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