Clamping device for circuit board welding

Abstract

The invention belongs to the technical field of circuit board welding, and particularly relates to a clamping device for circuit board welding, which comprises a clamping rod and a first connecting plate, the clamping rod is composed of a reinforcing rib, a triangular connecting frame, a second connecting bolt, a clamping piece cushion, a connecting beam and a limiting block, the triangular connecting frame is located at the front end of the clamping rod, and the second connecting bolt is located at the front end of the clamping piece cushion; and the reinforcing rib is fixed on the triangular connecting frame. According to the invention, the clamping piece cushions made of a high-temperature-resistant silica gel material (the thickness is 2-5mm, and the surface is provided with anti-slip lines) are arranged at the parts, for clamping the circuit board, of the inner sides of the clamping rods, so that the problems that the clamping part of a traditional device is not provided with a flexible contact part, hard metal is easy to scratch a circuit or a bonding pad on the surface layer of the circuit board, and the circuit board is easy to slip during clamping are solved; the effects of protecting the surface of the circuit board from being damaged, adapting to the welding high-temperature environment and enhancing the clamping friction force are achieved.

Description

Technical Field

[0001] This invention relates to the field of circuit board soldering technology, specifically to a clamping device for circuit board soldering. Background Technology

[0002] In the circuit board manufacturing industry chain, the soldering process is the core step in achieving circuit conductivity and component fixation. Clamping devices, as the "positioning carrier" in the soldering process, directly affect soldering accuracy, production efficiency, and product qualification rate. Currently, while the clamping devices used in circuit board soldering production can meet basic clamping needs, with the iteration of circuit board technology and the upgrading of production processes, traditional clamping devices are gradually becoming unable to adapt to the high-precision and high-stability soldering requirements, becoming one of the key bottlenecks restricting the improvement of circuit board manufacturing quality. From a technological development perspective, modern circuit boards are characterized by being "thin, small, and dense": the number of layers in multilayer circuit boards has increased from the traditional 4-8 layers to 16-32 layers, and the spacing between lines has been reduced to less than 0.1mm; flexible circuit boards, due to their bendability and lightweight advantages, are widely used in wearable devices, foldable screen phones, and other products. However, their soft and easily deformable nature places higher demands on the flexible contact and precise positioning of clamping devices. Traditional clamping devices mostly adopt standardized designs, with relatively simple material selection and structural layouts. They cannot adapt to circuit boards of different thicknesses and sizes, nor can they meet the clamping requirements of special materials such as flexible circuit boards. This leads to problems such as inconvenient operation and time-consuming adjustments during the soldering process, affecting production efficiency.

[0003] Traditional circuit board soldering clamping devices have significant design flaws in their clamping structure: First, the clamping area lacks flexible contact components adapted to the circuit board material, often using hard metal to directly contact the circuit board surface. During soldering, the concentrated clamping force can easily scratch the surface circuitry or pads of the circuit board. Second, there is no precise limiting structure; the circuit board position is maintained solely by clamping force. During soldering, the circuit board can easily slide along the clamping direction, causing the soldering point to shift. Third, the front-end connection structure is not strong enough. After long-term use, it is prone to deformation due to vibration or external impact during soldering operations, affecting clamping stability. At the same time, the rear-end connection component lacks a convenient adjustment structure, making it difficult to quickly adjust the clamping spacing according to the circuit board size, resulting in poor adaptability. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a clamping device for circuit board soldering to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a clamping device for circuit board soldering, comprising a clamping rod and a first connecting plate. The clamping rod consists of a reinforcing rib, a triangular connecting frame, a second connecting bolt, a clamping pad, a connecting beam, and a limiting block. The triangular connecting frame is located at the front end of the clamping rod, and the reinforcing rib is fixed on the triangular connecting frame. The clamping pad is provided on the inner side of the clamping rod where the circuit board is clamped. A protruding limiting block is provided on one side of the clamping pad. A connecting beam is provided at the rear end of the clamping rod, and the second connecting bolt is provided in the middle of the connecting beam. The clamping pad is made of high-temperature resistant silicone material with a thickness of 2-5mm and has anti-slip texture on its surface.

[0006] As a preferred embodiment of the present invention, a locking device is provided at the rear end of the clamping rod, and a second connecting plate is provided on the outer surface of the locking device; the second connecting plate is made of aluminum alloy, the surface is anodized, and the thickness is 3-6mm.

[0007] As a preferred embodiment of the present invention, a drive shaft is provided at the center of the locking device, a driven shaft is connected to one side of the drive shaft, and a locking shaft is provided above the driven shaft; the drive shaft and the driven shaft are connected by gear meshing, and the transmission ratio is 1:1.5.

[0008] As a preferred technical solution of the present invention, the first connecting plate is divided into upper and lower groups, which are connected to the nut by the first connecting bolt; the first connecting bolt is made of high-strength alloy steel, the surface is nickel-plated for rust prevention, and the nut has anti-slip texture on the inside.

[0009] As a preferred embodiment of the present invention, the limiting blocks are symmetrically distributed rubber protrusions with a height of 1-3mm and a spacing of 5-10mm between adjacent limiting blocks, which are adapted to the positioning holes on the edge of the circuit board.

[0010] As a preferred embodiment of the present invention, the locking device is a knob-type structure, the knob surface is provided with anti-slip grooves, the rotation angle range is 0-180°, and it is marked with scale markings, with a minimum adjustment accuracy of 5°.

[0011] As a preferred embodiment of the present invention, the triangular connecting frame is an isosceles triangle structure with a side length ratio of 3:3:2, and the reinforcing ribs are symmetrically distributed along the centerline of the triangular connecting frame, with a quantity of 2-4 ribs.

[0012] As a preferred embodiment of the present invention, the clamping rod is made of stainless steel, has a rectangular cross-section, a length × width of 10mm × 5mm, an overall length of 150-200mm, and can rotate 0-90° around the connecting beam.

[0013] As a preferred embodiment of the present invention, the number of the first connecting bolts is 4, which are arranged in a rectangular shape, the center distance between adjacent bolts is 30-50mm, and a spring washer is provided between the nut and the first connecting plate.

[0014] As a preferred technical solution of the present invention, the connecting locking shaft is a telescopic structure with a telescopic range of 0-20mm, and the end is provided with a spherical chuck, which cooperates with the positioning hole on the driven shaft (5) to achieve locking.

[0015] Compared with the prior art, the present invention provides a clamping device for circuit board soldering, which has the following advantages: This invention solves the problems of traditional devices lacking flexible contact parts, easy scratching of the circuit board surface or pads by hard metal, and easy slippage during clamping by setting a high-temperature resistant silicone pad (2-5mm thick, with anti-slip texture on the surface) on the part of the clamping rod that holds the circuit board. It achieves the effects of protecting the circuit board surface from damage, adapting to the high-temperature soldering environment, and enhancing clamping friction. Furthermore, by setting a raised limiting block on one side of the clamping pad, it solves the problems of traditional devices lacking precise limiting structures and easy slippage of the circuit board during soldering, leading to soldering point displacement. The limiting block and the positioning hole on the edge of the circuit board are matched to form a mechanical limit, which ensures the accuracy of the welding point. By setting a triangular connecting frame structure at the front end of the clamping rod and fixing reinforcing ribs on the triangular connecting frame, and setting a second connecting bolt in the middle of the connecting beam at the rear end of the clamping rod, the problems of insufficient strength of the front end connection structure, easy deformation after long-term use, lack of convenient adjustment structure at the rear end, and poor adaptability of traditional devices are solved. This achieves the effect of improving the deformation resistance of the front end connection structure, ensuring clamping stability, and allowing the clamping distance of the clamping rod to be quickly adjusted according to the size of the circuit board, thus enhancing the adaptability of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the structure of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4 This is a left view of the structure of the present invention.

[0017] In the diagram: 1. Clamping pad; 2. Limiting block; 3. Drive shaft; 4. Connecting beam; 5. Driven shaft; 6. Nut; 7. First connecting bolt; 8. First connecting plate; 9. Connecting locking shaft; 10. Second connecting plate; 11. Locking device; 12. Second connecting bolt; 13. Triangular connecting frame; 14. Reinforcing rib; 15. Clamping rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0019] Please see Figure 1-4 The present invention provides the following technical solution: a clamping device for circuit board soldering, comprising a clamping rod 15 and a first connecting plate 8. The clamping rod 15 is composed of a reinforcing rib 14, a triangular connecting frame 13, a second connecting bolt 12, a clamping pad 1, a connecting beam 4, and a limiting block 2. The triangular connecting frame 13 is located at the front end of the clamping rod 15, and the reinforcing rib 14 is fixed on the triangular connecting frame 13. A clamping pad 1 is provided on the inner side of the clamping rod 15 where the circuit board is clamped. A protruding limiting block 2 is provided on one side of the clamping pad 1. A connecting beam 4 is provided at the rear end of the clamping rod 15, and a second connecting bolt 12 is provided in the middle of the connecting beam 4. The clamping pad 1 is made of high-temperature resistant silicone material with a thickness of 2-5mm and has anti-slip texture on the surface.

[0020] Specifically, a locking device 11 is provided at the rear end of the clamping rod 15, and a second connecting plate 10 is provided on the outer surface of the locking device 11; the second connecting plate 10 is made of aluminum alloy, the surface is anodized, and the thickness is 3-6mm.

[0021] Specifically, a drive shaft 3 is provided at the center of the locking device 11, a driven shaft 5 is connected to one side of the drive shaft 3, and a locking shaft 9 is provided above the driven shaft 5; the drive shaft 3 and the driven shaft 5 are connected by gear meshing, and the transmission ratio is 1:1.5.

[0022] Specifically, the first connecting plate 8 is divided into upper and lower groups, which are connected to the nut 6 by the first connecting bolt 7; the first connecting bolt 7 is made of high-strength alloy steel with nickel plating for rust prevention, and the nut 6 has anti-slip texture on the inside.

[0023] Specifically, the limiting block 2 is a symmetrically distributed rubber protrusion with a height of 1-3mm, and the spacing between adjacent limiting blocks 2 is 5-10mm, which is compatible with the positioning holes on the edge of the circuit board.

[0024] Specifically, the locking device 11 is a knob-type structure with anti-slip grooves on the surface. The rotation angle range is 0-180° and it has scale markings with a minimum adjustment accuracy of 5°.

[0025] Specifically, the triangular connecting frame 13 is an isosceles triangle structure with a side length ratio of 3:3:2. The reinforcing ribs 14 are symmetrically distributed along the centerline of the triangular connecting frame 13, with a quantity of 2-4 ribs.

[0026] Specifically, the clamping rod 15 is made of stainless steel, with a rectangular cross-section measuring 10mm x 5mm and an overall length of 150-200mm. It can rotate 0-90° around the connecting beam 4.

[0027] Specifically, there are four first connecting bolts 7 arranged in a rectangular shape, with a center-to-center distance of 30-50mm between adjacent bolts, and a spring washer is provided between the nut 6 and the first connecting plate 8.

[0028] Specifically, the connecting locking shaft 9 is a telescopic structure with a telescopic range of 0-20mm, and its end is equipped with a ball-shaped locking head that cooperates with the positioning hole on the driven shaft 5 to achieve locking.

[0029] In this embodiment, the circuit board welding clamping device of the present invention is mainly composed of 15 core components. Each component can be divided into four major modules according to its function: clamping module, limiting module, connecting module, and locking module. Each module works together to achieve stable clamping, precise limiting, and convenient adjustment of the circuit board. The clamping module, as the core execution part of the device, includes a clamping rod 15, a clamping pad 1, a triangular connecting frame 13, and a reinforcing rib 14. The clamping rod 15 is the main carrier of the clamping action. The clamping pad 1 directly contacts the circuit board to achieve flexible clamping. The triangular connecting frame 13 and the reinforcing rib 14 work together to improve the strength and stability of the front clamping structure. The limiting module only has a limiting block 2, which is used to cooperate with the positioning hole of the circuit board to achieve precise limiting. The connecting module includes a connecting beam 4, a first connecting plate 8, a first connecting bolt 7, a nut 6, a second connecting bolt 12, and a second connecting plate 10, which are responsible for the connection between the components and the fixation of the device to the external welding platform. The locking module includes a locking device 11, a drive shaft 3, a driven shaft 5, and a connecting locking shaft 9, which are used to adjust and lock the clamping distance to ensure clamping stability. From the assembly perspective, the front end of the clamping rod 15 is fixed to the triangular connecting frame 13 by welding, and the two sides of the triangular connecting frame 13 are fixed to the reinforcing ribs 14 by spot welding; the inner side of the clamping rod 15 is attached to the clamping pad 1 with high temperature resistant double-sided adhesive (temperature resistant up to 200℃), and one side of the clamping pad 1 is formed into a limiting block 2 by molding process; the rear section of the clamping rod 15 is connected to the connecting beam 4 by bolts, and the middle of the connecting beam 4 is provided with a threaded hole, which is connected to the second connecting bolt 12 by thread; the rear end of the clamping rod 15 is welded to the outer shell of the locking device 11, and the inside of the locking device 11 is equipped with the drive shaft 3 through the bearing, the gear of the drive shaft 3 meshes with the gear of the driven shaft 5, and the top of the driven shaft 5 is provided with a positioning hole, which cooperates with the ball joint of the connecting locking shaft 9; the upper and lower sets of the first connecting plate 8 are connected by the first connecting bolt 7, one end of the first connecting bolt 7 is threaded to the nut 6, one side of the first connecting plate 8 is welded to the second connecting plate 10, and the second connecting plate 10 is connected to the external welding platform by bolts.

[0030] The circuit board soldering clamping device of the present invention is mainly composed of 15 core components. Each component can be divided into four major modules according to its function: clamping module, limiting module, connecting module, and locking module. Each module works together to achieve stable clamping, precise limiting, and convenient adjustment of the circuit board. The clamping module, as the core execution part of the device, includes a clamping rod 15, a clamping pad 1, a triangular connecting frame 13, and a reinforcing rib 14. The clamping rod 15 is the main carrier of the clamping action. The clamping pad 1 directly contacts the circuit board to achieve flexible clamping. The triangular connecting frame 13 and the reinforcing rib 14 work together to improve the strength and stability of the front clamping structure. The limiting module only has a limiting block 2, which is used to cooperate with the positioning hole of the circuit board to achieve precise limiting. The connecting module includes a connecting beam 4, a first connecting plate 8, a first connecting bolt 7, a nut 6, a second connecting bolt 12, and a second connecting plate 10, which are responsible for the connection between the components and the fixation of the device to the external welding platform. The locking module includes a locking device 11, a drive shaft 3, a driven shaft 5, and a connecting locking shaft 9, which are used to adjust and lock the clamping distance to ensure clamping stability. From the assembly perspective, the front end of the clamping rod 15 is fixed to the triangular connecting frame 13 by welding, and the two sides of the triangular connecting frame 13 are fixed to the reinforcing ribs 14 by spot welding; the inner side of the clamping rod 15 is attached to the clamping pad 1 with high temperature resistant double-sided adhesive (temperature resistant up to 200℃), and one side of the clamping pad 1 is formed into a limiting block 2 by molding process; the rear section of the clamping rod 15 is connected to the connecting beam 4 by bolts, and the middle of the connecting beam 4 is provided with a threaded hole, which is connected to the second connecting bolt 12 by thread; the rear end of the clamping rod 15 is welded to the outer shell of the locking device 11, and the inside of the locking device 11 is equipped with the drive shaft 3 through the bearing, the gear of the drive shaft 3 meshes with the gear of the driven shaft 5, and the top of the driven shaft 5 is provided with a positioning hole, which cooperates with the ball joint of the connecting locking shaft 9; the upper and lower sets of the first connecting plate 8 are connected by the first connecting bolt 7, one end of the first connecting bolt 7 is threaded to the nut 6, one side of the first connecting plate 8 is welded to the second connecting plate 10, and the second connecting plate 10 is connected to the external welding platform by bolts.

[0031] The working principle and usage process of the present invention: The working process of the circuit board welding clamping device of the present invention is mainly divided into five steps: clamping preparation, spacing adjustment, limit fixing, welding operation, and unlocking and disassembly. Each step works together to achieve precise clamping and stable welding of the circuit board. During the clamping preparation stage, the operator must first check the condition of each component of the device, confirming that the clamping pad 1 is undamaged, the limiting block 2 is not deformed, the gears of the drive shaft 3 and driven shaft 5 mesh smoothly, and the connecting locking shaft 9 extends and retracts normally. Next, the device is fixed to the external welding platform via the first connecting plate 8 and the second connecting plate 10. The lower first connecting plate 8 is connected to the threaded hole of the platform with an M5 bolt with a bolt torque of 15 N·m. The second connecting plate 10 is fixed to the edge of the platform with an M5 bolt, ensuring that the clamping direction of the clamping rod 15 is consistent with the welding operation direction. Finally, the surface of the clamping pad 1 is cleaned by wiping the silicone surface of the clamping pad 1 with a lint-free cloth soaked in 95% alcohol to remove dust or residual welding slag and avoid affecting the clamping friction. During the spacing adjustment stage, the operator, taking the thickness of the circuit board to be welded as 2mm as an example, rotates the knob of the locking device 11. When rotating clockwise, the drive shaft 3 rotates. When the knob rotates 10°, the gear of the drive shaft 3 also rotates 10°. Since the gear meshing transmission ratio between the drive shaft 3 and the driven shaft 5 is 1:1.5, the driven shaft 5 will move outward along the linear guide rail by 0.5mm. When rotating counterclockwise, the driven shaft 5 moves inward. By using the scale markings on the knob surface, the clamping spacing of the clamping rod 15 is adjusted to be slightly greater than the thickness of the circuit board, for example, 2.2mm. Then, the clamping angle of the clamping rod 15 is adjusted. The second connecting bolt 12 is loosened, and the clamping rod 15 is rotated around the connecting beam 4 to the target angle. For vertical welding, it rotates 90°, and for horizontal welding, it remains at 0°. After adjustment, the second connecting bolt 12 is tightened with a bolt torque of 8N·m to fix the angle of the clamping rod 15. During the limiting and fixing stage, place the circuit board to be soldered between the clamping pads 1 of the two sets of clamping rods 15, aligning the edge positioning holes of the circuit board with the limiting block 2 on one side of the clamping pad 1. Gently push the circuit board to allow the limiting block 2 to be embedded in the positioning hole to a depth of 1mm, thus achieving the initial limiting of the circuit board. Then, fine-tune the knob of the locking device 11, rotating it clockwise to reduce the clamping distance of the clamping rods 15 until the clamping pad 1 is in close contact with the surface of the circuit board. This can be judged by feel or by using a pressure sensor to monitor the clamping force. The recommended clamping force is 50-80N to avoid excessive force that could deform the circuit board. Finally, lock the position of the driven shaft 5 by pushing the pull ring of the locking shaft 9, so that the ball-shaped chuck at the end is embedded in the positioning hole of the driven shaft 5. A "click" sound indicates that the locking is complete. At this time, the driven shaft 5 cannot move, and the clamping distance is stable at 2mm. During the welding operation, the operator uses a soldering iron or welding robot to weld the points to be welded. During the welding process, the silicone pad of the clamping pad 1 buffers the clamping force to avoid scratching the circuit. The limiting block 2 limits the sliding of the circuit board, with a positioning deviation of ≤0.03mm. The triangular connecting frame 13 and the reinforcing rib 14 cooperate to ensure that the front end of the clamping rod 15 does not deform. Slight vibrations during welding will not cause the clamping position to shift. If it is necessary to adjust the welding angle, the second connecting bolt 12 can be loosened and the clamping rod 15 can be rotated. For example, when welding the edge points of the circuit board, the clamping rod 15 can be rotated to 45°. After adjustment, the second connecting bolt 12 can be tightened to ensure that the angle of the clamping rod 15 is stable during the welding process. During the unlocking and disassembly phase, after welding is completed, the operator pulls the pull ring of the connecting locking shaft 9 to disengage the ball joint from the positioning hole of the driven shaft 5, thus unlocking the driven shaft 5. Then, the knob of the locking device 11 is rotated counterclockwise to increase the clamping distance of the clamping rod 15 to 2.5mm, so that the circuit board is disengaged from the clamping pad 1 and the limiting block 2. Finally, the circuit board is gently removed, and the quality of the welding points is checked. If there are no abnormalities, one clamping welding operation is completed. If continuous welding is required, the above steps of adjusting the distance to unlocking and disassembly are repeated.

[0032] Before installation begins, all components must be inventoried to ensure they are complete and undamaged. The specific component list includes: 15 clamping rods (2 pieces, 180mm length), 1 clamping pad (2 pieces, 100mm length), 13 triangular connecting brackets (2 pieces, 60mm base), 14 reinforcing ribs (6 pieces, 40mm length), 2 limiting blocks (8 pieces, 3mm diameter), 4 connecting beams (2 pieces, 80mm length), 8 first connecting plates (2 sets, 2 pieces each, 120mm length), 7 first connecting bolts (8 pieces, M8×30mm), 6 nuts (8 pieces, M8), 12 second connecting bolts (2 pieces, M8×20mm), 10 second connecting plates (2 pieces, 80mm length), 11 locking devices (2 pieces, 30mm diameter), 3 drive shafts (2 pieces, 20 teeth), and 5 driven shafts (2 pieces). The set includes: 30 teeth for the gear, 9 connecting locking shafts, 2 connecting locking shafts (25mm in length), 8 M8 spring washers, and 2 rolls of 3M9448H high-temperature resistant double-sided adhesive. In the component pre-assembly stage, firstly, assemble the clamping rod 15 and the triangular connecting bracket 13. Align the apex hole of the triangular connecting bracket 13 with the protrusion at the front end of the clamping rod 15, and perform argon arc welding with a welding current of 120A and a welding time of 1 second. The weld must be continuous and free of porosity. After welding, deburring is performed. Then, install the reinforcing rib 14, and connect the 3... Reinforcing ribs 14 are placed symmetrically along the centerline of the triangular connecting frame 13 at 15mm intervals and fixed by resistance spot welding with a welding current of 10kA and a welding time of 0.5s, ensuring that the reinforcing ribs are tightly fitted to the triangular connecting frame 13. Next, clip pad 1 is pasted. Clip pad 1 is cut to a length of 100mm, and the protective film of the high-temperature resistant double-sided adhesive is removed. Clip pad 1 is aligned with the inner side of the clamping rod 15, with the edges flush, and is slowly pasted and pressed for 10s with a pressure of 50N, ensuring no air bubbles. Finally, the internal components of the locking device 11 are assembled. The drive shaft 3 is installed in the housing of the locking device 11 through bearings, and the driven shaft 5 is installed through a linear guide rail. The gear meshing clearance is adjusted to between 0.1-0.15mm. Finally, the connecting locking shaft 9 is installed to ensure smooth extension and retraction. During overall assembly, first connect the clamping rod 15 to the connecting beam 4. Connect the connecting beam 4 to the rear section of the clamping rod 15 using M6 bolts with a bolt torque of 8 N·m, ensuring that the connecting beam 4 is perpendicular to the clamping rod 15. Next, assemble the first connecting plate 8. Connect the upper and lower sets of the first connecting plates 8 to the nuts 6 using the first connecting bolts 7 and nut 6, inserting spring washers with a bolt torque of 25 N·m, ensuring that the two sets of the first connecting plates 8 are parallel with a parallelism error ≤0.1 mm. Then, connect the clamping rod 15 to the first connecting plate 8. The upper set of the first connecting plate 8 is connected to the rear end of the clamping rod 15 via a hinge with a hinge shaft diameter of 6 mm, ensuring that the clamping rod 15 can rotate freely around the hinge. Finally, install the second connecting plate 10 and spot weld it to the housing of the locking device 11 with a weld diameter of 4 mm and a spacing of 20 mm. After welding, check the perpendicularity of the second connecting plate 10 and the locking device 11. The debugging process needs to be carried out in steps. For clamping force debugging, use a digital push-pull force gauge with a range of 0-200N and an accuracy of ±0.1N. Place the probe between the two sets of clamping rods 15, rotate the locking device 11 knob to increase the clamping force, and record the reading. When it reaches 50N, mark the knob position. Continue rotating to 80N and mark another position, ensuring the clamping force can be adjusted smoothly within the range of 50-80N without jamming. For limit accuracy debugging, use a two-dimensional image measuring instrument with an accuracy of ±0.001mm. Place a standard calibration plate with a 0.001mm precision positioning hole on the device, so that the limit block 2 is embedded in the positioning hole. Measure the deviation between the positioning hole of the calibration plate and the device's reference point, adjust the installation position of the second connecting plate 10 to ensure the deviation is ≤0.03mm, and measure again after fixing the second connecting plate 10 to confirm. For angle adjustment and debugging, use a digital angle gauge with an accuracy of ±0.1°. Loosen the second connecting bolt 12 and rotate the clamping rod 15 to 0°, 45°, and 90°. Measure the angle with the welding platform and adjust the connection position between the connecting beam 4 and the clamping rod 15 to ensure the deviation is ≤0.5°. Tighten the second connecting bolt 12 and check again. For locking reliability debugging, adjust the clamping distance to 2mm and lock the connecting locking shaft 9. Use a vibration test bench to perform a vibration test with an amplitude of 0.5mm and a frequency of 100Hz for 1 hour. After the test, use the knob scale to determine whether the driven shaft 5 has deviated. If it has deviated, adjust the diameter of the locking shaft 9 chuck or the depth of the driven shaft 5 positioning hole to ensure that the locking force is ≥10N.

[0033] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A clamping device for circuit board soldering, comprising a clamping rod (15) and a first connecting plate (8), characterized in that: The clamping rod (15) is composed of a reinforcing rib (14), a triangular connecting frame (13), a second connecting bolt (12), a clamping pad (1), a connecting beam (4), and a limiting block (2). The triangular connecting frame (13) is located at the front end of the clamping rod (15). The reinforcing rib (14) is fixed on the triangular connecting frame (13). The clamping pad (1) is provided on the inner side of the clamping rod (15) where the circuit board is clamped. The limiting block (2) is provided on one side of the clamping pad (1). The connecting beam (4) is provided at the rear end of the clamping rod (15). The second connecting bolt (12) is provided in the middle of the connecting beam (4). The clamping pad (1) is made of high-temperature resistant silicone material with a thickness of 2-5mm and has anti-slip texture on the surface.

2. The circuit board soldering clamping device according to claim 1, characterized in that: The rear end of the clamping rod (15) is provided with a locking device (11), and the outer surface of the locking device (11) is provided with a second connecting plate (10); the second connecting plate (10) is made of aluminum alloy, the surface is anodized, and the thickness is 3-6mm.

3. The circuit board soldering clamping device according to claim 1, characterized in that: The locking device (11) has a drive shaft (3) at its center, a driven shaft (5) is connected to one side of the drive shaft (3), and a connecting locking shaft (9) is provided above the driven shaft (5); the drive shaft (3) and the driven shaft (5) are connected by gear meshing, and the transmission ratio is 1:1.

5.

4. The circuit board soldering clamping device according to claim 1, characterized in that: The first connecting plate (8) is divided into upper and lower groups, which are connected to the nut (6) by the first connecting bolt (7); the first connecting bolt (7) is made of high-strength alloy steel, and the surface is plated with nickel for rust prevention, and the nut (6) has anti-slip texture on the inside.

5. The circuit board soldering clamping device according to claim 1, characterized in that: The limiting block (2) is a symmetrically distributed rubber protrusion with a height of 1-3mm. The distance between adjacent limiting blocks (2) is 5-10mm, which is compatible with the positioning holes on the edge of the circuit board.

6. The circuit board soldering clamping device according to claim 1, characterized in that: The locking device (11) is a knob-type structure. The knob surface is provided with anti-slip grooves, the rotation angle range is 0-180°, and it is marked with scale. The minimum adjustment accuracy is 5°.

7. The circuit board soldering clamping device according to claim 1, characterized in that: The triangular connecting frame (13) is an isosceles triangle with a side length ratio of 3:3:

2. The reinforcing ribs (14) are symmetrically distributed along the center line of the triangular connecting frame (13), and there are 2-4 ribs.

8. The circuit board soldering clamping device according to claim 1, characterized in that: The clamping rod (15) is made of stainless steel, with a rectangular cross section, a length × width of 10mm × 5mm, and an overall length of 150-200mm. It can rotate 0-90° around the connecting beam (4).

9. A clamping device for circuit board soldering according to claim 1, characterized in that: The number of the first connecting bolts (7) is 4, which are distributed in a rectangular shape. The center distance between adjacent bolts is 30-50mm. A spring washer is provided between the nut (6) and the first connecting plate (8).

10. A clamping device for circuit board soldering according to claim 1, characterized in that: The connecting locking shaft (9) is a telescopic structure with a telescopic range of 0-20mm. It has a ball-shaped locking head at the end, which cooperates with the positioning hole on the driven shaft (5) to achieve locking.

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