Universal tool for selective wave soldering

Abstract

A universal tool for selective wave soldering comprises a bottom plate and a back plate installed at the bottom of the bottom plate, open holes matched with a circuit board are formed in the bottom plate and the back plate, a frame is installed at the top of the bottom plate, at least two sliding rails are installed on the frame at the open holes in a sliding mode, and each sliding rail comprises a sliding rail support. Track supporting edges matched with a circuit board are arranged on the two sides of the sliding rail support respectively, lower clamping blocks are installed at the two ends of the sliding rail support respectively, upper clamping blocks are connected to the lower clamping blocks through clamping screws, and clamping gaps matched with a frame are reserved between the upper clamping blocks and the lower clamping blocks. An adjusting stop block matched with the circuit board is further mounted on the slide rail bracket in a sliding manner; a sliding plate support is slidably mounted on the back plate at the opening, and a plurality of supporting blocks matched with the circuit board are slidably mounted on the sliding plate support. The method is good in universality, is especially suitable for some bare boards and circuit boards which are difficult to select and weld, facilitates the reduction of the board passing difficulty, and improves the welding quality.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic product soldering, in particular to a universal fixture for selective wave soldering. Background Art

[0002] Selective Wave Soldering, also known as selective soldering, is an advanced soldering technology widely used in the manufacturing process of electronic products, especially for complex and delicate electronic assemblies. However, for production enterprises with small batches of multiple product varieties, the traditional selective wave soldering fixtures have certain limitations. Since the soldering requirements of each product are different, more types and quantities of fixtures are needed to meet the production requirements, which not only increases the production preparation time and cost, but also reduces the production flexibility. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a universal fixture for selective wave soldering with good versatility, which is particularly suitable for some bare boards and circuit boards that are difficult to select for soldering, helps to reduce the difficulty of passing the board, and improves the soldering quality, aiming at the deficiencies of the prior art.

[0004] The technical problem to be solved by the utility model is realized through the following technical solutions. The utility model is a universal fixture for selective wave soldering, including a bottom plate and a back plate installed at the bottom of the bottom plate. Openings for cooperating with the circuit board are provided on both the bottom plate and the back plate. A frame is installed on the top of the bottom plate. At least two sliding tracks are slidably installed on the frame at the openings. Each sliding track includes a slide rail bracket. Track support edges for cooperating with the circuit board are provided on both sides of the slide rail bracket. Lower clamping blocks are installed at both ends of the slide rail bracket. An upper clamping block is connected to the lower clamping block through a clamping screw. A clamping gap for cooperating with the frame is left between the upper clamping block and the lower clamping block. An adjusting block for cooperating with the circuit board is also slidably installed on the slide rail bracket. An adjusting screw is screwed on the adjusting block;

[0005] A slide plate bracket is slidably installed on the back plate at the openings. A number of support blocks for cooperating with the circuit board are slidably installed on the slide plate bracket. Fixing screws are screwed on the support blocks. A chute for cooperating with the slide plate bracket is provided on the back plate. Locking screws are screwed at both ends of the slide plate bracket.

[0006] The technical problem to be solved by the utility model can also be further realized through the following technical solutions. For the above-mentioned universal fixture for selective wave soldering, lower balls are also installed on the lower clamping blocks, and lower rolling grooves for cooperating with the lower balls are provided on the frame.

[0007] The technical problem to be solved by the present utility model can also be further achieved through the following technical solutions. For the above-mentioned general tooling for selective wave soldering, upper ball bearings are also installed at the top ends of the sliding brackets, and upper rolling grooves are provided on the back plate for mating with the upper ball bearings.

[0008] The technical problem to be solved by the present utility model can also be further achieved through the following technical solutions. For the above-mentioned general tooling for selective wave soldering, 3 - 8 support blocks are provided on each skate bracket.

[0009] The technical problem to be solved by the present utility model can also be further achieved through the following technical solutions. For the above-mentioned general tooling for selective wave soldering, the bottom plate is made of synthetic stone material by double - side milling through machining. Steps are milled on the front and back sides and the outer bottom surface of the side of the bottom plate as track surfaces, and steps are milled on the inner side of the bottom plate as the support part for the circuit board, and the two steps are coplanar.

[0010] The technical problem to be solved by the present utility model can also be further achieved through the following technical solutions. For the above-mentioned general tooling for selective wave soldering, the frame is composed of 4 prism - shaped plates and is fixed to the bottom plate by bolts.

[0011] The technical problem to be solved by the present utility model can also be further achieved through the following technical solutions. For the above-mentioned general tooling for selective wave soldering, the frame is composed of 4 aluminum alloy plates. The interior of the frame is hollowed out for weight reduction, and length scales are provided on the left and right side plates of the frame.

[0012] The technical problem to be solved by the present utility model can also be further achieved through the following technical solutions. For the above-mentioned general tooling for selective wave soldering, the back plate is composed of 4 aluminum alloy plates.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The width of the general tooling of the present utility model can be adjusted, with strong versatility, facilitating compatibility with circuit boards of different width dimensions, and saving a large number of special toolings.

[0015] 2. The general tooling of the present utility model has bottom support, which can reduce the deformation of the circuit board during the welding process, avoid height compensation for each point during selective soldering programming, and the tin - penetration consistency of the solder joints is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a top - view structural diagram of the present utility model;

[0018] Figure 3 It is a right side view of a structure of the present utility model;

[0019] Figure 4 It is a front view of a structure of the present utility model. Specific embodiments

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0021] Refer to Figures 1-4 , a general tooling for selective wave soldering, including a bottom plate 1 and a back plate 2 installed at the bottom of the bottom plate 1. Openings for cooperating with the circuit board are provided on both the bottom plate 1 and the back plate 2. A frame 3 is installed on the top of the bottom plate 1. Specifically:

[0022] Bottom plate 1: It is made of composite stone material through a precision machining double-sided milling process. This material not only has excellent wear resistance, heat resistance and chemical stability, but also ensures the high precision and stability of the tooling under long-term use. Steps are milled on the front and back sides and the bottom surface of the outer side of the bottom plate 1. These steps serve as track surfaces, providing a reference for the installation of the sliding track and reducing the friction during sliding at the same time. Steps are also milled on the inner side of the bottom plate 1 as the direct supporting part of the circuit board, ensuring the smoothness and accurate positioning of the circuit board during the welding process. The co-planar design of the two steps further improves the overall flatness and precision of the tooling;

[0023] Back plate 2: It is composed of four aluminum alloy plates spliced together. The selection of aluminum alloy material not only ensures the strength and rigidity of the back plate 2, but also realizes the lightweight design. The back plate 2 not only provides a stable support foundation for the entire tooling, but also cooperates with the slide plate bracket 12 through the chute 13 provided thereon to realize the support and adjustment of the back of the circuit board. The excellent thermal conductivity of the aluminum alloy material also helps to quickly dissipate the heat generated during the welding process, protecting the circuit board and the tooling itself from thermal damage;

[0024] Frame 3: It is composed of four aluminum alloy plates spliced together. The internal part adopts a hollow design to reduce the overall weight while maintaining sufficient strength and stiffness. Length scales 17 are provided on the left and right side plates of the frame 3, facilitating users to quickly and accurately adjust the positions of the sliding track and the support block 15, improving the flexibility and adaptability of the tooling. The frame 3 is firmly fixed on the bottom plate 1 through bolts, ensuring the stability and reliability of the entire tooling structure;

[0025] At least two sliding tracks are slidably mounted on the frame 3 at the opening. Each sliding track includes a slide rail bracket 5. On both sides of the slide rail bracket 5, there are provided track support edges 6 for cooperating with the circuit board. At both ends of the slide rail bracket 5, lower clamping blocks 7 are installed. An upper clamping block 8 is connected to the lower clamping block 7 by a clamping screw 9. A clamping gap for cooperating with the frame 3 is left between the upper clamping block 8 and the lower clamping block 7. An adjusting stop block 10 for cooperating with the circuit board is also slidably mounted on the slide rail bracket 5. An adjusting screw 11 is screwed on the adjusting stop block 10; The lower clamping block 7 and the upper clamping block 8 are connected by a clamping screw 9 to form a clamping gap for fixing the slide rail bracket 5 to the frame 3 to provide a stable foundation. The track support edges 6 are closely fitted with the circuit board to prevent the circuit board from shifting during the welding process. The adjusting stop block 10 can slide on the slide rail bracket 5 and its position can be adjusted by the adjusting screw 11 to adapt to circuit boards of different sizes and shapes. This design enables the tooling to flexibly meet the diverse circuit board welding requirements;

[0026] Preferably, a lower ball 18 is also installed on the lower clamping block 7, and a lower rolling groove for cooperating with the lower ball 18 is provided on the frame 3. This design reduces the frictional resistance during the movement of the sliding track, improving the smoothness and accuracy of the sliding.

[0027] A slide plate bracket 12 is slidably mounted on the back plate 2 at the opening. A number of support blocks 15 for cooperating with the circuit board are slidably mounted on the slide plate bracket 12. Fixing screws 16 are screwed on the support blocks 15 respectively. A chute 13 for cooperating with the slide plate bracket 12 is provided on the back plate 2. Locking screws 14 are screwed at both ends of the slide plate bracket 12. The support blocks 15 are slidably mounted in the chute 13 on the back plate 2 and can be adjusted in position as needed to support the back of the circuit board. Locking screws 14 are screwed at both ends of the slide plate bracket 12 to fix the position of the slide plate bracket 12 and prevent it from moving during the welding process; The support blocks 15 are mounted on the slide plate bracket 12 to directly support the back of the circuit board. Fixing screws 16 are screwed on the support blocks 15 to adjust the height and position of the support blocks 15, ensuring that the circuit board remains horizontal and evenly stressed during the welding process. The specific number depends on the size and weight of the circuit board. Preferably, 3 - 8 support blocks 15 can be installed on each slide plate bracket 12. Further preferably, 5 support blocks 15 can be installed on each slide plate bracket 12;

[0028] Preferably, upper balls 19 are also installed at the top of both ends of the sliding bracket, and upper rolling grooves for cooperating with the upper balls 19 are provided on the back plate 2. This design also aims to reduce the frictional resistance and enhance the stability of the sliding bracket.

[0029] The general tooling for selective wave soldering provided by the utility model has good versatility. Through components such as the carefully designed bottom plate 1, back plate 2, frame 3, slide rail bracket 5, skateboard bracket 12, and support block 15, efficient, precise, and flexible support and positioning of the circuit board are achieved, providing a strong guarantee for improving the welding quality of the circuit board.

[0030] The working principle of the utility model is as follows:

[0031] Loosen the clamping screws 9 on the upper clamping blocks 8 at both ends of the slide rail bracket 5. At this time, the width between the slide rail brackets 5 can be adjusted according to the width dimension of the circuit board, and then the clamping screws 9 are tightened. Then, after loosening the adjustment screw 11 on the adjustment slider on the slide rail bracket 5, the adjustment slider can be slid to limit the length direction of the circuit board;

[0032] Then, the skateboard bracket 12 below is adjusted by moving according to the actual situation of the bottom surface of the circuit board, and all the plug-in holes that need to be selectively soldered need to be avoided. The adjustment method is to loosen the locking screws 14 on both sides, then slide to the appropriate position, and then tighten the locking screws 14. There are multiple slidable locking screws 14 on the support rod, and the top of the locking screw 14 is flush with the bottom surface of the circuit board, which plays a role in preventing the circuit board from deforming and can be adjusted according to the fixing screw 16 to better meet the actual use needs.

Claims

1. A universal tool for selective wave soldering, characterized in that: It comprises a bottom plate and a back plate installed at the bottom of the bottom plate, openings matching with the circuit board are arranged on the bottom plate and the back plate, a frame is installed on the top of the bottom plate, at least two sliding rails are slidably installed on the frame at the opening, each sliding rail comprises a slide rail bracket, track support edges matching with the circuit board are arranged on both sides of the slide rail bracket, lower clamping blocks are installed at both ends of the slide rail bracket, upper clamping blocks are connected to the lower clamping blocks by clamping screws, a clamping gap matching with the frame is reserved between the upper clamping blocks and the lower clamping blocks, an adjustment block matching with the circuit board is also slidably installed on the slide rail bracket, and an adjustment screw is screwed on the adjustment block; A skateboard bracket is slidably installed on the back plate at the opening, and a plurality of support blocks cooperating with the circuit board are slidably installed on the skateboard bracket. Fixing screws are screwed on the support blocks, a sliding groove cooperating with the skateboard bracket is arranged on the back plate, and locking screws are screwed on both ends of the skateboard bracket.

2. The universal tooling for selective wave soldering according to claim 1, characterized in that: A lower ball is also installed on the lower clamping block, and a lower rolling groove matched with the lower ball is arranged on the frame.

3. The universal tooling for selective wave soldering according to claim 1, characterized in that: Upper balls are installed on the tops of both ends of the sliding bracket, and upper rolling grooves matching with the upper balls are arranged on the back plate.

4. The universal tooling for selective wave soldering according to claim 1, characterized in that: Each skateboard bracket is provided with 3-8 supporting blocks.

5. The universal tooling for selective wave soldering according to claim 1, characterized in that: The bottom plate is made of synthetic stone material by double-sided milling through machining, and steps are milled on the front and rear sides and the outer bottom surface of the bottom plate as track surfaces, and steps are milled on the inner side of the bottom plate as a support part for the circuit board, and the two steps are coplanar.

6. The universal tooling for selective wave soldering according to claim 1, characterized in that: The frame is formed by splicing four edge plates, and the frame is fixed on the bottom plate by bolts.

7. The universal tooling for selective wave soldering according to claim 6, characterized in that: The frame is composed of 4 aluminum alloy plates, the interior of the frame is hollowed out to reduce weight, and the left and right side plates of the frame are both provided with length scales.

8. The universal tooling for selective wave soldering according to claim 1, characterized in that: The back plate is composed of 4 aluminum alloy plates.

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