Welding fixture for production of combined lamp module circuit board

Abstract

The invention relates to a welding fixture for combined lamp module circuit board production, which comprises a workbench, a rotating cavity is formed in the workbench, an overturning assembly is arranged on the workbench, the overturning assembly comprises a rotating shaft rotationally connected in the rotating cavity, two fixing frames are fixedly arranged on the rotating shaft, and the two fixing frames are oppositely arranged on the two sides of the rotating cavity; the fixing frame is provided with a fixing assembly used for fixing the circuit board, and the workbench is provided with an overturning motor driving the rotating shaft to rotate. The circuit board welding device has the effect of improving the circuit board welding efficiency.

Description

Technical Field

[0001] This application relates to the field of circuit board welding technology, and in particular to a welding fixture for the production of circuit boards for combined lamp modules. Background Technology

[0002] Combination lamp modules are widely used in many industries such as lighting and electronic display. The circuit board is a key component that controls the operation mode of the combination lamp module. During the production of the circuit board, it is necessary to connect the main control board with the light-emitting unit board, driver board and other circuit boards with different functions through pins so that current and signals can be transmitted between the boards to realize the overall function of the module. In order to ensure the stability of the circuit board during soldering, it is necessary to fix the circuit board with a soldering fixture.

[0003] In the prior art, circuit board soldering is usually carried out by workers at a separate workstation in the production workshop. After one side of the circuit board is soldered, the worker takes the circuit board out of the fixture, flips it over, puts it back into the fixture and fixes it, and finally solders the other side of the circuit board.

[0004] However, the frequent removal and fixing of circuit boards by workers at the workstation consumes a lot of time, resulting in low circuit board soldering efficiency and a significant deficiency. Summary of the Invention

[0005] To improve the welding efficiency of circuit boards, this application provides a welding fixture for the production of combined lamp module circuit boards.

[0006] The welding fixture for manufacturing combined lamp module circuit boards provided in this application adopts the following technical solution: A welding fixture for producing a combined lamp module circuit board includes a worktable with a rotating cavity. A flipping assembly is provided on the worktable. The flipping assembly includes a rotating shaft rotatably connected to the rotating cavity. Two fixing frames are fixedly mounted on the rotating shaft and are arranged opposite to each other on both sides of the rotating cavity. Fixing components for fixing the circuit board are provided on the fixing frames. A flipping motor for driving the rotating shaft to rotate is provided on the worktable.

[0007] By adopting the above technical solution, before welding, two circuit boards are fixed in a fixed frame by a fixing component. Then, the two circuit boards are welded manually or by a welding arm. After welding on one side, the flipping motor is started to drive the rotating shaft to rotate. The rotation of the rotating shaft causes the two fixed frames to rotate around the rotating shaft. The position of the two fixed frames in the rotating cavity changes, and the side of the circuit board to be welded flips upward. Finally, the circuit board is welded again. The setting of the flipping component realizes the automatic flipping of the circuit board after welding on one side, eliminating the need for workers to manually remove the flipped circuit board and re-fix it, which greatly reduces the manual operation time. At the same time, the workbench adopts a dual-station design to realize the synchronous welding of two circuit boards, which significantly improves the welding efficiency of the combined lamp module circuit board.

[0008] Optionally, the fixing component includes studs rotatably connected to opposite sides of the fixing frame, a fixing plate threaded onto the studs, guide grooves that slide with the fixing plates on opposite inner sidewalls of the fixing frame, and the fixing plates abutting against the surface of the circuit board.

[0009] By adopting the above technical solution, after the circuit board is placed inside the fixed frame, the worker rotates the stud. Under the guidance and limitation of the guide groove, the stud rotates and drives the fixed plate to move downward along the guide groove. When the fixed plate presses the circuit board against the surface of the fixed frame, the fixing assembly of the circuit board is completed. This setting realizes the fixing of circuit boards of different thicknesses and effectively reduces the displacement or shaking of the circuit board during the welding process, ensuring the accuracy of the welding position.

[0010] Optionally, the worktable is provided with circular guide frames on both sides opposite to the rotating cavity. The straight line where the centers of the two guide frames are located coincides with the axis of the rotating shaft. Each guide frame is provided with a transition groove. Guide wheels are provided on both sides opposite to the fixed frame. The guide wheels are rolled in the transition groove.

[0011] By adopting the above technical solution, when the fixed frame is flipped, the guide wheels on both sides of the fixed frame roll along the transition groove, thereby providing guidance and stable support for the rotation of the fixed frame, reducing the possibility of shaking during the rotation of the fixed frame, thereby reducing the damage to the soldered components on the circuit board or the misalignment of the parts to be soldered due to unstable rotation, and further ensuring the accuracy of the soldering position.

[0012] Optionally, the fixed frame has a positioning groove at the end away from the rotating shaft, and the inner sidewall of the rotating cavity has a receiving groove corresponding to the positioning groove. A positioning block is slidably connected inside the receiving groove. A magnetic strip is provided at the end of the positioning block facing the rotating shaft. An electromagnetic block for attracting the magnetic strip is provided on the inner sidewall of the positioning groove. A return spring is provided inside the receiving groove. The return spring pulls the positioning block to be embedded inside the receiving groove. When the positioning block is inserted into the positioning groove, the fixed frame is in a horizontal state.

[0013] By adopting the above technical solution, when the flipping assembly is running, the electromagnetic block is energized. When the fixed frame rotates to the horizontal welding station, the positioning groove and the receiving groove are aligned. The electromagnetic block automatically attracts the magnetic strip, causing the positioning block to insert into the positioning groove, thereby locking the horizontal position of the fixed frame and further reducing the welding deviation of the circuit board caused by the shaking of the fixed frame during the welding process. After the single-sided welding is completed, the electromagnetic block is de-energized, and the reset spring resets and pulls the positioning block back into the receiving groove, so that the positioning block does not obstruct the flipping movement of the fixed frame, realizing the rapid switching of the welding station. The setting of the positioning block locks the horizontal position of the two fixed frames, ensuring that each fixed frame is in a horizontal position during welding.

[0014] Optionally, the inner sidewall of the rotating cavity is provided with a movable groove corresponding to each of the two fixed frames. A receiving plate is slidably connected in the movable groove. A placement groove is provided on the receiving plate. A support assembly is provided in the placement groove. The support assembly includes a support airbag disposed in the placement groove. A support plate is slidably connected to the support airbag in the placement groove. A driving assembly and an inflation assembly are provided in the movable groove. When the driving assembly drives the support plate to move below the fixed frame, the inflation assembly drives the support airbag to inflate. The surface of the support plate abuts against the surface of the circuit board to be soldered.

[0015] By adopting the above technical solution, after the fixed frame is locked by the positioning block, the driving component drives the receiving plate to move toward the rotating cavity. The movement of the receiving plate causes the support component to move below the fixed frame. The inflation component causes the support airbag to inflate and expand. The support airbag pushes the support plate to slide upward and tightly abut against the back of the circuit board. This can effectively disperse local stress during the welding process and prevent the suspended circuit board from breaking or deforming due to external force, making the welding process more stable.

[0016] Optionally, the workbench is provided with a drive slot communicating with the moving slot. The drive assembly includes a drive shaft rotatably connected inside the drive slot. Multiple gears are coaxially sleeved on the drive shaft. The end face of the receiving plate near the drive shaft is provided with a rack plate corresponding to each of the multiple gears. The rack plate meshes with the corresponding gear. The workbench is provided with a drive motor that drives the drive shaft to rotate.

[0017] By adopting the above technical solution, when support is required, the drive motor starts to drive the two drive shafts to rotate in the forward direction. The drive shafts drive multiple gears to rotate in the forward direction synchronously. At this time, the gears drive the meshing rack plate to move towards the direction of the rotating cavity, and the rack plate drives the support plate to move to the bottom of the circuit board. When it is necessary to flip, the drive motor drives the drive shaft to rotate in the opposite direction, and the gear drives the rack plate to move the support plate into the moving slot.

[0018] Optionally, the inner sidewalls of the moving groove are provided with guide grooves, and the receiving plate is provided with guide blocks on both sides of the opposite side that slide with the guide grooves. The inflation assembly includes an air supply bag disposed in the guide groove. Each air supply bag is connected to an air storage bladder through an air pipe. An expansion cavity for the air storage bladder to expand is provided on the worktable. The two air storage bladders are connected to the support air bladder through air pipes. Both the air storage bladder and the support air bladder are made of elastic material.

[0019] By adopting the above technical solution, during the process of the drive component driving the support plate to move towards the inside of the rotating cavity, the support plate drives the guide block to continuously squeeze the air supply bag. The gas in the air supply bag is transmitted to the air storage bag along the air pipe. The air storage bag continuously expands in the expansion chamber. When the support plate drives the support air bag to move out of the moving groove, the squeezing of the support air bag by the inner side wall of the moving groove disappears. The gas in the air storage bag flows to the inside of the support air bag along the air pipe. The support air bag inflates and pushes the support plate against the back of the circuit board, thus forming a stable circuit board. When the drive assembly moves the support plate into the moving slot, the bottom surface of the fixed frame squeezes the support airbag, and the gas in the support airbag flows into the storage airbag. As the guide slot gradually moves away from the air supply bag, the gas in the storage airbag flows back into the air supply bag. In this way, the support plate is supported by mechanical compression and gas transmission, without the need for an additional power source, effectively reducing energy consumption.

[0020] Optionally, the support airbag is made of a high-temperature resistant elastic material.

[0021] By adopting the above technical solution, the support airbag is made of high temperature resistant elastic material, which can effectively resist the influence of heat sources such as high temperature of soldering iron and molten solder during the welding process, avoid the aging, deformation or failure of airbag material due to high temperature, and ensure that the support airbag always maintains stable elastic support performance during long-term continuous welding operations.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. In this embodiment of the application, by setting a flipping component and a fixing component, the flipping component enables the automatic flipping of the circuit board after welding one side, eliminating the need for workers to manually remove the flipped side and re-fix the circuit board, which greatly reduces manual operation time. At the same time, the workbench adopts a dual-station design to realize the synchronous welding of two circuit boards, which significantly improves the welding efficiency of the combined lamp module circuit board. 2. In this embodiment of the application, by setting a positioning block, when the flipping component is running, the electromagnetic block is energized. When the fixed frame rotates to the horizontal welding position, the positioning groove and the receiving groove are aligned. The electromagnetic block automatically attracts the magnetic strip, causing the positioning block to insert into the positioning groove, thereby locking the horizontal position of the fixed frame and further reducing the deviation of the circuit board welding caused by the shaking of the fixed frame during the welding process. 3. In this embodiment of the application, by setting an inflation component and a support component, after the fixed frame is locked by the positioning block, the drive component drives the receiving plate to move toward the rotating cavity. The movement of the receiving plate causes the support component to move below the fixed frame. The inflation component causes the support airbag to inflate and expand. The support airbag pushes the support plate to slide upward and tightly abut against the back of the circuit board. This can effectively disperse local stress during the welding process and prevent the suspended circuit board from breaking or deforming due to external force, making the welding process more stable. Attached Figure Description

[0023] Figure 1 This is a structural diagram of this application.

[0024] Figure 2 This is a schematic diagram of the structure of the fixed component in the embodiments of this application.

[0025] Figure 3 This is a cross-sectional view of the workbench in an embodiment of this application.

[0026] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0027] Figure 5 This is a schematic diagram of the structure of the support component in the embodiments of this application.

[0028] Figure 6 This is a cross-sectional view of the support plate in the embodiments of this application. Explanation of reference numerals in the attached drawings: 01, Circuit board; 1, Worktable; 2, Rotating cavity; 3, Tilting assembly; 31, Rotating shaft; 32, Fixing frame; 321, Limiting groove; 322, Guide wheel; 33, Tilting motor; 4, Fixing assembly; 41, Stud; 42, Fixing plate; 5, Guide frame; 51, Transition groove; 6, Positioning groove; 61, Electromagnetic block; 7, Receiving groove; 71, Positioning block; 72, Magnetic strip; 73, Return spring; 8, Moving groove; 81, Guide groove; 9, Receiving plate; 91, Guide block; 92, Placement groove; 10, Drive assembly; 101, Drive shaft; 102, Gear; 103, Rack plate; 104, Drive motor; 11, Support assembly; 111, Support airbag; 112, Support plate; 12, Inflation assembly; 121, Air supply bag; 122, Air storage bag; 13, Expansion chamber. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0030] This application discloses a welding fixture for the production of combined lamp module circuit boards.

[0031] Reference Figure 1 and Figure 2 A welding fixture for producing a combined lamp module circuit board includes a workbench 1, a rotating cavity 2 at the center of the workbench 1, a flipping assembly 3 on the workbench 1, the flipping assembly 3 including a rotating shaft 31 rotatably connected to the center of the rotating cavity 2, two fixing frames 32 fixedly installed on the rotating shaft 31, the two fixing frames 32 being arranged opposite each other on both sides of the rotating cavity 2, each fixing frame 32 being provided with a fixing component 4 for fixing the circuit board 01, a flipping motor 33 installed inside the workbench 1, the output shaft of the flipping motor 33 being coaxially fixedly connected to the rotating shaft 31.

[0032] Reference Figure 2 The fixing component 4 includes studs 41 rotatably connected to opposite sides of the fixing frame 32. Mounting plates are installed on opposite sides of the fixing frame 32. The mounting plates are rotatably sleeved on the outer surface of the studs 41. Each stud 41 is threadedly connected to a fixing plate 42. A limiting groove 321 is provided on the opposite inner sidewall of the fixing frame 32 to slide with the fixing plate 42. Both the limiting groove 321 and the studs 41 are vertically arranged.

[0033] The worker places two circuit boards 01 inside the fixing frame 32, rotates the stud 41, and under the guide and limit of the limiting groove 321, the stud 41 rotates, causing the fixing plate 42 to move downward along the limiting groove 321. When the fixing plate 42 presses the circuit board 01 against the surface of the fixing frame 32, the fixing of the circuit board 01 is completed. Then, the two circuit boards 01 are welded manually or by a mechanical welding arm. After the single-sided welding is completed, the flip motor 33 is started, driving the rotating shaft 31 to rotate. The rotating shaft 31 drives the two fixing frames 32 to rotate around the rotating shaft 31. The position inside the moving cavity 2 changes, and the side of the circuit board 01 to be soldered flips upward. Finally, the unsoldered side of the circuit board 01 is soldered. After the soldering of both sides of the circuit board 01 is completed, the worker removes the soldered circuit board 01 and then places a new circuit board 01. In this way, the circuit board 01 after soldering one side is automatically flipped, without the need for the worker to manually remove, flip and re-fix the circuit board 01, which greatly reduces the manual operation time. At the same time, the workbench 1 adopts a dual-station design to realize the synchronous soldering of two circuit boards 01, which significantly improves the soldering efficiency of the combined lamp module circuit board 01.

[0034] Reference Figure 1 and Figure 2 The workbench 1 is equipped with guide frames 5 on both sides opposite to the rotating cavity 2. The guide frames 5 are circular, and the straight line where the center of the two guide frames 5 is located coincides with the axis of the rotating shaft 31. Each guide frame 5 has a transition groove 51 along the circumference. Each fixed frame 32 has guide wheels 322 installed on both sides opposite to each other. The guide wheels 322 are rolled inside the transition groove 51. When the flipping component 3 drives the fixed frame 32 to flip, the guide wheels 322 roll along the transition groove 51, which reduces the damage to the soldered components on the circuit board 01 or the misalignment of the parts to be soldered due to unstable rotation, and ensures the accuracy of the soldering position.

[0035] Reference Figure 3 and Figure 4 Each fixed frame 32 has a positioning groove 6 at the end away from the rotating shaft 31. The inner wall of the rotating cavity 2 has a receiving groove 7 corresponding to the positioning groove 6. When the fixed frame 32 is horizontal, the positioning groove 6 and the corresponding receiving groove 7 are directly opposite each other. A positioning block 71 is slidably connected inside the receiving groove 7. A magnetic strip 72 is fixedly connected to the end of the positioning block 71 facing the rotating shaft 31. An electromagnetic block 61 for attracting the magnetic strip 72 is fixedly connected to the inner wall of the positioning groove 6.

[0036] Reference Figure 3 and Figure 4 Multiple return springs 73 are provided in the receiving groove 7. One end of the return spring 73 is fixedly connected to the inner side wall of the receiving groove 7, and the other end is fixedly connected to the positioning block 71. In the natural state, the positioning block 71 is embedded in the receiving groove 7.

[0037] During the operation of the flipping component 3, the electromagnetic block 61 is energized. When the fixed frame 32 rotates to the horizontal welding position, the positioning groove 6 and the receiving groove 7 are aligned. The electromagnetic block 61 overcomes the elastic force of the reset spring 73 to attract the magnetic strip 72, causing the positioning block 71 to insert into the positioning groove 6. With the positioning block 71 and the positioning groove 6 engaged, the fixed frame 32 is locked in a horizontal position, thereby reducing the possibility of reduced welding effect due to the tilt of the fixed frame 32. After single-sided welding is completed, the power supply to the electromagnetic block 61 is turned off, and the reset spring 73 resets and pulls the positioning block 71 back into the receiving groove 7, so that the positioning block 71 does not obstruct the flipping movement of the fixed frame 32, making it easy for the flipping assembly 3 to quickly switch welding stations.

[0038] Reference Figure 3 , Figure 5 and Figure 6 The inner wall of the rotating cavity 2 is provided with a moving groove 8 corresponding to the two fixed frames 32. The moving groove 8 is located below the receiving groove 7. The inner wall opposite to the moving groove 8 is provided with a guide groove 81. The guide groove 81 is parallel to the moving groove 8. Each guide groove 81 is slidably connected to a guide block 91. The two guide blocks 91 are fixedly connected to a support plate slidably connected in the moving groove 8. The worktable 1 is provided with a drive assembly 10 corresponding to the two support plates 9.

[0039] Reference Figure 3 , Figure 5 and Figure 6 The worktable 1 has a drive groove that communicates with the moving groove 8. The drive assembly 10 includes a drive shaft 101 rotatably connected inside the drive groove. Multiple gears 102 are coaxially fixedly connected to the drive shaft 101 along its length. Each receiving plate 9 has a rack plate 103 that corresponds one-to-one with the multiple gears 102 fixedly connected to its end face near the drive shaft 101. The rack plate 103 meshes with the corresponding gear 102. A drive motor 104 is installed on the worktable 1. The output shaft of the drive motor 104 is coaxially fixedly connected to the drive shaft 101.

[0040] Reference Figure 3 , Figure 5 and Figure 6 The receiving plate 9 has a placement groove 92, and a support component 11 is provided inside the placement groove 92. The support component 11 includes a support airbag 111 fixedly connected in the placement groove 92. The support airbag 111 is made of high temperature resistant elastic material. A support plate 112 is installed on the surface of the support airbag 111. The support plate 112 is slidably connected inside the placement groove 92. When the support airbag 111 deflates and contracts, the surface of the support plate 112 is flush with the surface of the supporting plate. The end of the support plate 112 away from the rotation shaft 31 is provided with an inclined surface (not shown in the figure). The fixed frame 32 is provided with a guide inclined surface (not shown in the figure) that slides with the inclined surface.

[0041] Reference Figure 3 , Figure 5 and Figure 6 An inflation assembly 12 is provided on the workbench 1. The inflation assembly 12 includes an air supply bag 121 fixedly connected to the end of the guide groove 81 near the rotating cavity 2. The air supply bag 121 stores gas inside. Each air supply bag 121 is connected to an air storage bladder 122 through an air tube (not shown in the figure). The air storage bladder 122 is made of elastic material. An expansion cavity for the air storage bladder 122 to expand is opened on the workbench 1. Both air storage bladders 122 are connected to a support air bladder 111 through an air tube.

[0042] After the fixed frame 32 is locked by the positioning block 71, the drive motor 104 starts to drive the two drive shafts 101 to rotate in the forward direction. The drive shafts 101 drive multiple gears 102 to rotate in the forward direction synchronously. At this time, the gears 102 drive the meshing rack plate 103 to move towards the direction of the rotating cavity 2. The support plate drives the guide block 91 to slide along the guide groove 81 towards the air supply bag 121. The guide block 91 continuously squeezes the air supply bag 121. The gas in the air supply bag 121 is transmitted to the air storage bag 122 along the air pipe. Because the support air bag 111 is squeezed by the inner wall of the moving groove 8, gas cannot enter the support air bag 111. The air storage bag 122 continuously expands in the expansion cavity. When the support plate moves the support airbag 111 out of the moving groove 8, the pressure of the inner wall of the moving groove 8 on the support airbag 111 disappears. The gas in the storage airbag 122 flows along the air tube into the support airbag 111. The support airbag 111 inflates and pushes the support plate 112 to slide upward and closely abut against the back of the circuit board 01. This disperses the local stress on the circuit board 01 during the welding process, preventing the suspended part of the circuit board 01 from breaking or deforming due to stress concentration, making the welding process more stable. After welding, the drive motor 104 drives the drive shaft 101 to rotate in the opposite direction. The inclined surface of the support plate 112 gradually approaches the guide slope. Under the guidance of the guide slope, the fixed frame 32 exerts downward pressure on the support plate 112. The gas in the support airbag 111 flows back to the storage airbag 122 along the air pipe. As the support moves, the support plate 112 enters the moving groove 8. The squeezing effect of the guide block 91 on the air supply bag 121 gradually decreases. Under its own elasticity, the air storage bag 122 causes the gas to flow back to the air supply bag 121 along the air pipe. In this way, the support plate 112 is supported by mechanical squeezing and gas transmission without the need for an additional power source, effectively reducing energy consumption.

[0043] The implementation principle of the welding fixture for producing a combined lamp module circuit board in this application embodiment is as follows: A worker places two circuit boards 01 inside the fixed frame 32, rotates the stud 41, and under the guidance and limitation of the guide groove 81, the stud 41 rotates, causing the fixed plate 42 to move downwards along the guide groove 81. When the fixed plate 42 presses the circuit board 01 against the surface of the fixed frame 32, the fixing component 4 of the circuit board 01 is completed. Then, the two circuit boards 01 are welded manually or by a mechanical welding arm. After single-sided welding is completed, the flip motor 33 is started, driving the rotating shaft 31 to rotate. The rotating shaft 31 drives the two fixed frames 32 to rotate around the frame. As shaft 31 rotates, the positions of the two fixed frames 32 within the rotating cavity 2 change, and the side of circuit board 01 to be soldered flips upwards. Finally, the unsoldered side of circuit board 01 is soldered. After both sides of circuit board 01 are soldered, the worker removes the soldered circuit board 01 and places a new circuit board 01. This achieves automatic flipping of circuit board 01 after soldering one side, eliminating the need for workers to manually remove, flip, and re-fix the circuit board 01, significantly reducing manual operation time. At the same time, the workbench 1 adopts a dual-station design, enabling simultaneous soldering of two circuit boards 01, which significantly improves the soldering efficiency of the combined lamp module circuit board 01.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding fixture for producing circuit boards of combined lamp modules, comprising a worktable (1), characterized in that, The workbench (1) has a rotating cavity (2) and a flipping assembly (3). The flipping assembly (3) includes a rotating shaft (31) rotatably connected in the rotating cavity (2). Two fixing frames (32) are fixedly installed on the rotating shaft (31). The two fixing frames (32) are arranged opposite to each other on both sides of the rotating cavity (2). A fixing assembly (4) for fixing the circuit board (01) is installed on the fixing frame (32). A flipping motor (33) for driving the rotating shaft (31) to rotate is installed on the workbench (1).

2. The welding fixture for producing a combined lamp module circuit board according to claim 1, characterized in that, The fixing component (4) includes studs (41) rotatably connected to opposite sides of the fixing frame (32), a fixing plate (42) threadedly connected to the studs (41), a guide groove (81) slidably engaged with the fixing plate (42) on the opposite inner sidewall of the fixing frame (32), and the fixing plate (42) abutting against the surface of the circuit board (01).

3. The welding fixture for producing a combined lamp module circuit board according to claim 1, characterized in that, The workbench (1) is provided with circular guide frames (5) on both sides opposite to the rotating cavity (2). The straight line where the center of the two guide frames (5) is located coincides with the axis of the rotating shaft (31). Each guide frame (5) is provided with a transition groove (51). The fixed frame (32) is provided with guide wheels (322) on both sides opposite to each other. The guide wheels (322) are rolled in the transition groove (51).

4. The welding fixture for producing a combined lamp module circuit board according to claim 1, characterized in that, The fixed frame (32) has a positioning groove (6) at the end away from the rotating shaft (31). The inner wall of the rotating cavity (2) has a receiving groove (7) corresponding to the positioning groove (6). A positioning block (71) is slidably connected inside the receiving groove (7). A magnetic strip (72) is provided at the end of the positioning block (71) facing the rotating shaft (31). An electromagnetic block (61) for attracting the magnetic strip (72) is provided on the inner wall of the positioning groove (6). A return spring (73) is provided inside the receiving groove (7). The return spring (73) pulls the positioning block (71) to be embedded inside the receiving groove (7). When the positioning block (71) is inserted into the positioning groove (6), the fixed frame (32) is in a horizontal state.

5. The welding fixture for producing a combined lamp module circuit board according to claim 1, characterized in that, The inner wall of the rotating cavity (2) is provided with a moving groove (8) corresponding to the two fixed frames (32). A receiving plate (9) is slidably connected in the moving groove (8). A placement groove (92) is provided on the receiving plate (9). A support component (11) is provided in the placement groove (92). The support component (11) includes a support airbag (111) disposed in the placement groove (92). A support plate (112) is slidably connected in the placement groove (92) on the support airbag (111). A driving component (10) and an inflation component (12) are provided in the moving groove (8). When the driving component (10) drives the support plate (112) to move below the fixed frame (32), the inflation component (12) drives the support airbag (111) to inflate. The surface of the support plate (112) abuts against the surface to be soldered on the circuit board (01).

6. A welding fixture for producing a combined lamp module circuit board according to claim 5, characterized in that, The workbench (1) is provided with a drive groove that communicates with the moving groove (8). The drive assembly (10) includes a drive shaft (101) rotatably connected inside the drive groove. Multiple gears (102) are coaxially sleeved on the drive shaft (101). The receiving plate (9) is provided with a rack plate (103) on the end face near the drive shaft (101) that corresponds one-to-one with the multiple gears (102). The rack plate (103) meshes with the corresponding gear (102). The workbench is provided with a drive motor (104) that drives the drive shaft (101) to rotate.

7. A welding fixture for producing a combined lamp module circuit board according to claim 6, characterized in that, The inner sidewalls of the moving groove (8) are provided with guide grooves (81), and the receiving plate (9) is provided with guide blocks (91) on both sides that slide with the guide grooves (81). The inflation assembly (12) includes an air supply bag (121) disposed in the guide groove (81). Each air supply bag (121) is connected to an air storage bag (122) through an air pipe. An expansion cavity for the air storage bag (122) is provided on the workbench (1). The two air storage bags (122) are connected to the support air bag (111) through an air pipe. Both the air storage bag (122) and the support air bag (111) are made of elastic material.

8. A welding fixture for producing a combined lamp module circuit board according to claim 7, characterized in that, The support airbag (111) is made of high-temperature resistant elastic material.

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