A workpiece auxiliary paint spraying jig and a paint coating processing technology of a workpiece

Abstract

This application relates to an auxiliary painting fixture for workpieces, comprising an auxiliary fixture including a processing table, a support frame, a module, and a lifting mechanism. The support frame is disposed on the processing table, and the module is disposed on the support frame. The lifting mechanism includes a first cylinder, a lifting block, and a push rod. The first cylinder is disposed on the support frame, the lifting block is disposed on the piston rod of the first cylinder, and the push rod is disposed on the lifting block. The module has a first through hole for the push rod to slide. This application has the effect of improving efficiency.

Description

Technical Field

[0001] This application relates to the technical field of workpiece painting, and in particular to a workpiece auxiliary painting fixture and a workpiece coating process. Background Technology

[0002] For some precision workpieces, in order to reduce the impact on conductivity, only the outer wall of the workpiece is sprayed with protective paint, and the inner wall of the workpiece is not covered with protective paint.

[0003] Existing technology, reference Figure 1 A painting device for a workpiece includes a processing table 11, a support frame 12 fixedly connected to the processing table 11, and a module 13 matching the workpiece fixedly connected to the support frame 12; a robotic arm is also provided on the processing table 11, and a spray gun is provided on the robotic arm. The workpiece is placed tightly against the module 13, and then the spray gun on the robotic arm sprays paint onto the outer wall of the workpiece.

[0004] After the coating is completed, in order to reduce damage to the coated workpiece, the operator needs to use less force to pick up the workpiece, otherwise the protective paint on the workpiece will be damaged. However, because the workpiece is attached to the module, it takes a lot of time for the operator to pick up the workpiece with less force, resulting in low efficiency. Summary of the Invention

[0005] To improve efficiency, this application provides a workpiece auxiliary painting fixture and a workpiece coating process.

[0006] Firstly, this application provides a workpiece auxiliary painting fixture, which adopts the following technical solution:

[0007] A workpiece auxiliary painting fixture includes an auxiliary fixture, which includes a processing table, a support frame, a module, and a lifting mechanism. The support frame is disposed on the processing table, and the module is disposed on the support frame. The lifting mechanism includes a first cylinder, a lifting block, and a push rod. The first cylinder is disposed on the support frame, the lifting block is disposed on the piston rod of the first cylinder, and the push rod is disposed on the lifting block. The module has a first through hole for the push rod to slide.

[0008] By adopting the above technical solution, the workpiece to be painted is placed on the module and pressed tightly against the module, and then painted. After the painting is completed, the first cylinder is activated. The piston rod of the first cylinder drives the lifting block to move, and the lifting block drives the push rod to move. The push rod will push the workpiece pressed against the module to move, so that the workpiece is no longer pressed tightly against the module, making it easier for the operator to pick it up, thereby saving time and improving efficiency.

[0009] Optionally, the support frame includes a base plate, a top plate, and a support column. The support column connects the base plate and the top plate. The base plate is mounted on the processing table. The first cylinder is mounted on the base plate. The lifting block is located between the base plate and the top plate. A second through hole for the top rod to slide is provided on the top plate. The module is provided with a connecting mechanism that connects to the top plate. The connecting mechanism includes a connecting column and a first connecting bolt. The connecting column is mounted on the top plate. A connecting groove for engaging with the connecting column is provided on the module. The first connecting bolt passes through the top plate and is threadedly connected to the module.

[0010] By adopting the above technical solution, a suitable module is selected according to the size and shape of the workpieces to be mass-produced. Then, the connecting column on the top plate is engaged with the connecting groove on the module. Next, the first connecting bolt passes through the top plate and is threadedly connected to the module, so that the module can be installed on the top plate, i.e., on the support frame.

[0011] Optionally, the lifting block includes a first connecting block, a second connecting block, and a second connecting bolt. The first connecting block abuts against the second connecting block, and the second connecting bolt passes through the first connecting block and is threadedly connected to the second connecting block. The first connecting block is located between the second connecting block and the base plate. The first connecting block has a third through hole for the first cylinder piston rod to pass through. The second connecting block has a fourth through hole and a third connecting bolt is provided on the second connecting block. The third connecting bolt passes through the fourth through hole and is threadedly connected to the first cylinder piston rod located in the third through hole. A stabilizing groove is provided at one end of the second connecting block near the first connecting block. A fifth through hole communicating with the stabilizing groove is provided on the second connecting block. A stabilizing block is engaged in the stabilizing groove, and one end of the top rod passes through the fifth through hole and is connected to the stabilizing block.

[0012] By adopting the above technical solution, the first cylinder is started, and the piston rod of the first cylinder drives the first connecting block and the second connecting block to move. The first connecting block and the second connecting block drive the stabilizing block to move, and the push rod on the stabilizing block will move. Moreover, when the push rod needs to be replaced after a long period of use, first rotate the second connecting bolt to separate the first connecting block and the second connecting block, then take the stabilizing block out of the stabilizing groove, and then separate the push rod from the first connecting block and the second connecting block for replacement.

[0013] Optionally, the cross-section of the second through hole is larger than the cross-section of the top rod. A cleaning mechanism is provided on the top plate. The cleaning mechanism includes two cleaning blocks and a fourth connecting bolt. The fourth connecting bolt passes through the cleaning blocks and is threadedly connected to the top plate. The ends of the two cleaning blocks away from the top plate abut against the side wall of the top rod.

[0014] By adopting the above technical solution, the cross-section of the second through hole is larger than that of the push rod, which facilitates the installation of the push rod; when the push rod moves, the two cleaning blocks will clean the impurities on the push rod, such as the protective paint sprayed on the push rod, reducing the phenomenon of protective paint on the push rod being stuck in the second through hole.

[0015] Optionally, the machining table is provided with an installation guide mechanism, which includes a moving block, a second cylinder, a third cylinder, a support block, a tray, a clamping adjustment block, a first adjustment component, and a second adjustment component. The second cylinder is mounted on the machining table, and the moving block is mounted on the piston rod of the second cylinder. The third cylinder is mounted on the moving block, and the support block is mounted on the piston rod of the third cylinder. The support block has a sixth through hole. The tray is mounted on the support block via the first adjustment component, and the tray can cover the sixth through hole. There are two clamping adjustment blocks, and the second adjustment component is mounted on the support block. Both clamping adjustment blocks are connected to the second adjustment component.

[0016] By adopting the above technical solution, the workpiece is placed on the pallet, and then the second adjustment component is activated. The second adjustment component drives two clamping adjustment blocks to move in opposite directions. The two clamping adjustment blocks adjust the position of the module on the workpiece on the pallet, and the two clamping adjustment blocks clamp the workpiece. Then, the first adjustment component drives the pallet to move so that the pallet no longer covers the sixth through hole and no longer abuts the workpiece. Then, the second cylinder is activated. The piston rod of the second cylinder drives the moving block to move, and the third cylinder on the moving block drives the support block to move, so that the workpiece clamped by the two clamping adjustment blocks can be aligned with the module. Then, the first adjustment component is activated. The three-cylinder system works by using the piston rod of the third cylinder to move the support block closer to the machining table, placing the workpiece held by the two clamping adjustment blocks onto the module. Then, the third cylinder is activated, moving the support block away from the machining table. Next, the first adjustment component is adjusted so that the pallet covers the sixth through hole again. Then, the third cylinder is activated again, moving the support block closer to the machining table, allowing the pallet to press down on the workpiece mounted on the module. Therefore, the installation guide mechanism not only places the workpiece on the module faster, saving installation time and improving efficiency, but also ensures the workpiece fits better against the module.

[0017] Optionally, the processing table is provided with an active rotation mechanism, which includes a rotating shaft, a rotating block, and a drive assembly. The rotating shaft is rotatably connected to the processing table, the rotating block is disposed on the rotating shaft, and the support frame is disposed on the rotating block. The drive assembly is disposed on the processing table and connected to the rotating shaft.

[0018] By adopting the above technical solution, when the workpiece is placed on the module, the drive component is activated. The drive component drives the rotating shaft to rotate, and the rotating block on the rotating shaft drives the support frame to rotate. The module located on the support frame will then drive the workpiece to rotate, so that the workpiece can be painted.

[0019] Optionally, the module is provided with a negative pressure adsorption component, which includes a negative pressure pump, a connecting pipe, and a suction pipe. The negative pressure pump is disposed on the processing table, the suction pipe is disposed on the module, and the connecting pipe connects the negative pressure pump and the suction pipe.

[0020] By adopting the above technical solution, when the workpiece is placed on the module, the negative pressure pump is started. The negative pressure pump will extract the gas between the module and the workpiece through the connecting pipe and the air extraction pipe, so that the gas is better connected to the module. The set negative pressure adsorption component can make the workpiece fit the module better, which can reduce the phenomenon of paint being sprayed on the inner wall of the workpiece.

[0021] Firstly, this application provides a painting process for a workpiece, which adopts the following technical solution:

[0022] A coating process for a workpiece includes the following steps: S1: first, place the workpiece on an auxiliary fixture and spray paint it; S2: transfer the painted workpiece to an oven for drying; S3: cool the dried workpiece; S4: trim the cooled workpiece to form the final product.

[0023] By adopting the above technical solution, placing the workpiece in the auxiliary fixture makes it easier to pick up the painted workpiece; then the painted workpiece is transferred to the drying oven for drying; next, the dried workpiece is cooled; finally, the cooled workpiece is trimmed to form the final product; therefore, the processing technology can save time and improve efficiency.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The lifting mechanism can prevent the workpiece from sticking to the workpiece after painting, making it easier for operators to pick up, thereby saving time and improving efficiency;

[0026] 2. The installation guide mechanism not only allows the workpiece to be placed on the module faster, saving installation time and improving efficiency, but also enables the workpiece to fit better against the module. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a painting device for workpieces in the prior art;

[0028] Figure 2 This is a schematic diagram of the workpiece auxiliary painting fixture in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the active rotation mechanism in the embodiments of this application;

[0030] Figure 4 This is a schematic diagram of the lifting block in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the structure for installing the guide mechanism in an embodiment of this application.

[0032] Reference numerals: 1. Auxiliary jig; 11. Processing table; 12. Support frame; 121. Base plate; 122. Top plate; 123. Support column; 13. Module; 2. Lifting mechanism; 21. First cylinder; 22. Lifting block; 221. First connecting block; 222. Second connecting block; 223. Second connecting bolt; 23. Top rod; 24. Third connecting bolt; 25. Stabilizing block; 3. Connecting mechanism; 31. Connecting column; 32. First connecting bolt; 4. Cleaning mechanism; 41. Cleaning block; 42. Fourth connecting bolt; 5. Installation guide 51. Guiding mechanism; 52. Moving block; 53. Second cylinder; 54. Third cylinder; 55. Support block; 56. Pallet; 57. Clamping adjustment block; 58. First adjustment component; 59. First motor; 50. Adjustment shaft; 51. Second adjustment component; 52. Bidirectional screw; 53. Second motor; 6. Active rotation mechanism; 61. Rotating shaft; 62. Rotating block; 63. Drive component; 64. First gear; 65. Second gear; 66. Third motor; 7. Negative pressure adsorption component; 71. Connecting pipe; 72. Suction pipe. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 2-5 This application will be described in further detail.

[0034] This application discloses an auxiliary painting fixture for workpieces.

[0035] refer to Figure 2 A workpiece auxiliary painting fixture includes an auxiliary fixture 1, which includes a processing table 11, an active rotation mechanism 6 on the processing table 11, a support frame 12 on the active rotation mechanism 6, a module 13 on the support frame 12, and a lifting mechanism 2 on the support frame 12.

[0036] refer to Figure 2 and Figure 3The active rotation mechanism 6 includes a rotating shaft 61 rotatably connected to the processing table 11, and a rotating block 62 fixedly connected to the rotating shaft 61. A drive assembly 63 is provided on the processing table 11, and the drive assembly 63 includes a third motor 633 fixedly connected to the processing table 11. A first gear 631 is keyed to the output shaft of the third motor 633; ​​a second gear 632 that meshes with the first gear 631 is keyed to the rotating shaft 61.

[0037] When the third motor 633 is started, the output shaft of the third motor 633 drives the first gear 631 to rotate, the first gear 631 drives the second gear 632 to rotate, the second gear 632 drives the rotating shaft 61 to rotate, and the rotating shaft 61 drives the rotating block 62 to rotate.

[0038] refer to Figure 2 and Figure 3 The support frame 12 includes a base plate 121 bolted to the rotating block 62. Four support columns 123 are bolted to the base plate 121. A top plate 122 is provided at the end of the support column 123 away from the base plate 121, and all four support columns 123 are bolted to the top plate 122.

[0039] The top plate 122 is provided with a connection mechanism 3 that is connected to the module 13. The connection mechanism 3 includes a connection post 31 that is fixedly connected to the top plate 122. The module 13 is provided with a connection groove that engages with the connection post 31. The top plate 122 is provided with a first connection bolt 32 that passes through the top plate 122 and is threadedly connected to the module 13.

[0040] refer to Figure 3 and Figure 4 The module 13 has a first through hole and the top plate 122 has a second through hole; the lifting mechanism 2 includes a first cylinder 21, the cylinder body of the first cylinder 21 is bolted to the bottom plate 121, and a lifting block 22 is connected to the piston rod of the first cylinder 21.

[0041] The lifting block 22 includes a first connecting block 221, on which a third through hole is provided for placing the piston rod of the first cylinder 21; a second connecting block 222 is provided at the end of the first connecting block 221 away from the base plate 121, and a second connecting bolt 223 is provided on the first connecting block 221, which passes through the first connecting block 221 and is threadedly connected to the second connecting block 222; both the first connecting block 221 and the second connecting block 222 are located between the base plate 121 and the top plate 122. A fourth through hole is provided on the second connecting block 222, and a third connecting bolt 24 is provided on the second connecting block 222, which passes through the fourth through hole and is threadedly connected to the piston rod of the first cylinder 21 located in the third through hole.

[0042] The second connecting block 222 has a fifth through hole. The end of the second connecting block 222 near the first connecting block 221 has a stabilizing groove. A stabilizing block 25 is engaged in the stabilizing groove. One end of the stabilizing block 25 abuts against the first connecting block 221. A push rod 23 is integrally provided on the end of the stabilizing block 25 away from the first connecting block 221. The end of the push rod 23 away from the stabilizing block 25 passes through the fifth through hole, the second through hole, and the first through hole in sequence. The cross-section of the second through hole is larger than the cross-section of the push rod 23.

[0043] When the first cylinder 21 is started, the piston rod of the first cylinder 21 drives the first connecting block 221 and the second connecting block 222 to move. The first connecting block 221 and the second connecting block 222 will then drive the stabilizing block 25 to move. The stabilizing block 25 will then drive the push rod 23 to move. The end of the push rod 23 that is away from the stabilizing block 25 will then extend out from the first through hole.

[0044] refer to Figure 3 and Figure 4 A cleaning mechanism 4 is provided on the side of the top plate 122 near the bottom plate 121. The cleaning mechanism 4 includes two cleaning blocks 41. Each cleaning block 41 is provided with a fourth connecting bolt 42 that passes through the cleaning block 41 and is threadedly connected to the top plate 122. When the two cleaning blocks 41 are connected to the top plate 122, the ends of the two cleaning blocks 41 away from the top plate 122 abut against the side wall of the top rod 23, and the two cleaning blocks 41 abut against each other to form a block in the shape of an inverted frustum.

[0045] When the push rod 23 moves, the two cleaning blocks 41 will scrape off the impurities on the side wall of the push rod 23.

[0046] refer to Figure 2 and Figure 5 The processing table 11 is provided with an installation guide mechanism 5. The installation guide mechanism 5 includes a second cylinder 52 connected to the processing table 11. A moving block 51 is connected to the piston rod of the second cylinder 52. A third cylinder 53 is connected to the moving block 51. A support block 54 is connected to the piston rod of the third cylinder 53. A sixth through hole is provided on the support block 54.

[0047] The support block 54 is provided with a first adjustment component 57. The first adjustment component 57 includes a first motor 531 fixedly connected to the support block 54. An adjustment shaft 572 is connected to the output shaft of the first motor 531. A support plate 55 is fixedly connected to the adjustment shaft 572. The support plate 55 can cover the sixth through hole.

[0048] The support block 54 has a sliding groove, and clamping adjustment blocks 56 are slidably connected to both ends of the sliding groove; the support block 54 is provided with a second adjustment component 58, which includes a bidirectional screw 581 rotatably connected in the sliding groove. The bidirectional screw 581 passes through two clamping adjustment blocks 56, and the two clamping adjustment blocks 56 are threadedly connected to both ends of the bidirectional screw 581 respectively; a second motor 582 is fixedly connected to the support block 54, and the output shaft of the second motor 582 is connected to one end of the bidirectional screw 581.

[0049] Module 13 or the workpiece is placed on the pallet 55. Then, the second motor 582 is started. The output shaft of the second motor 582 drives the bidirectional screw 581 to rotate. The bidirectional screw 581 drives the two clamping adjustment blocks 56 to move in opposite directions. The two clamping adjustment blocks 56 adjust the position of module 13 on the workpiece on the pallet 55 and clamp module 13 or the workpiece. Next, the first motor 531 is started. The output shaft of the first motor 531 drives the adjusting shaft 572 to rotate. The adjusting shaft 572 drives the pallet 55 to move so that the pallet 55 no longer covers the sixth through hole and no longer abuts against module 13 or the workpiece. Then, the second cylinder 52 is started. The piston rod of the second cylinder 52 drives the moving block 51 to move. The third cylinder 53 on the moving block 51 drives the support block 54 to move. The module 13 or workpiece held by the two clamping adjustment blocks 56 is aligned with the top plate 122. Then, the third cylinder 53 is activated, and the piston rod of the third cylinder 53 drives the support block 54 to move towards the machining table 11, so that the module 13 held by the two clamping adjustment blocks 56 is placed on the top plate 122, and the workpiece held by the two clamping adjustment blocks 56 is placed on the module 13. Then, the third cylinder 53 is activated, so that the support block 54 moves away from the machining table 11. Then, the first motor 531 is activated, so that the pallet 55 covers the sixth through hole again. Then, the third cylinder 53 is activated again, so that the support block 54 moves towards the machining table 11, so that the pallet 55 can press down on the module 13 mounted on the top plate 122, or press down on the workpiece mounted on the module 13.

[0050] refer to Figure 2 and Figure 3 The module 13 is equipped with a negative pressure adsorption component 7, which includes an air extraction pipe 72 connected to the module 13 and a connecting pipe 71 connected to the air extraction pipe 72; the processing table 11 is equipped with a negative pressure pump, and the end of the connecting pipe 71 away from the air extraction pipe 72 is connected to the negative pressure pump.

[0051] When the workpiece is placed on module 13, the negative pressure pump is started. The negative pressure pump will extract the gas between module 13 and the workpiece through connecting pipe 71 and suction pipe 72, so that the gas is better connected to module 13.

[0052] The implementation principle of the workpiece auxiliary painting fixture in this application embodiment is as follows: First, the end of the push rod 23 away from the stabilizing block 25 passes through the stabilizing groove and the fifth through hole on the second connecting block 222 in sequence, so that the stabilizing block 25 is engaged in the stabilizing groove of the second connecting block 222; then, the first connecting block 221 abuts against the second connecting block 222 and the stabilizing block 25 located in the stabilizing groove; then, the second connecting bolt 223 passes through the first connecting block 221 and is threadedly connected to the second connecting block 222.

[0053] Then the piston rod of the first cylinder 21 is extended into the third through hole of the first connecting block 221, and then the third connecting bolt 24 is threaded through the fourth through hole and connected to the piston rod of the first cylinder 21 located in the third through hole.

[0054] Then, the base plate 121 is bolted to the rotating block 62, and the cylinder body of the first cylinder 21 is bolted to the base plate 121. The support column 123 is bolted to the base plate 121, and the top plate 122 is bolted to the support column 123, with the push rod 23 passing through the second through hole on the top plate 122. Next, the two cleaning blocks 41 are connected to the top plate 122 with the fourth connecting bolt 42, and the ends of the two cleaning blocks 41 away from the top plate 122 abut against the side wall of the push rod 23.

[0055] Then, module 13 is placed on tray 55, and two clamping adjustment blocks 56 clamp module 13. Next, the position of module 13 is adjusted by the second cylinder 52, so that the connecting post 31 on the top plate 122 is aligned with the connecting groove on module 13, and the push rod 23 is aligned with the first through hole on module 13. Then, module 13 is transferred to the top plate 122 by the third cylinder 53 and the first motor 531. Then, the first connecting bolt 32 passes through the top plate 122 and is threaded to the module 13, so that module 13 can be quickly installed on the top plate 122.

[0056] Next, place the workpiece to be painted on the pallet 55, so that the two clamping adjustment blocks 56 clamp the workpiece. Then, adjust the position of the workpiece by the second cylinder 52 so that the workpiece is aligned with the rotating module 13. Then, transfer the workpiece to the module 13 by the third cylinder 53 and the first motor 531. Then, press the workpiece down with the pallet 55 so that the workpiece is in close contact with the module 13.

[0057] Then start the negative pressure pump to better adhere the workpiece to module 13.

[0058] When the workpiece needs to be painted, the third motor 633 is started, which causes the rotating shaft 61 to drive the rotating block 62 to rotate. The support frame 12 on the rotating block 62 will then rotate, the module 13 will rotate, and the workpiece on the module 13 will rotate, allowing the workpiece to be painted more effectively.

[0059] After the painting is completed, the first cylinder 21 is started. The piston rod of the first cylinder 21 drives the first connecting block 221 and the second connecting block 222 to move. The first connecting block 221 and the second connecting block 222 drive the stabilizing block 25 to move, so that the push rod 23 on the stabilizing block 25 can push the workpiece to move, so that the workpiece is no longer pressed against the module 13.

[0060] This application discloses a coating process for workpieces.

[0061] A coating process for a workpiece includes the following steps:

[0062] S1: First, place the workpiece tightly against the module 13 and spray paint it. After the painting is completed, start the first cylinder 21 so that the workpiece is no longer pressed against the module 13.

[0063] S2: Then transfer the painted workpiece into the drying oven for drying;

[0064] S3: Next, cool the dried workpiece;

[0065] S4: After cooling, the workpiece is trimmed to form the final product.

[0066] 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 workpiece auxiliary painting fixture, comprising an auxiliary fixture (1), characterized in that, The auxiliary fixture (1) includes a processing table (11), a support frame (12), a module (13) and a lifting mechanism (2). The support frame (12) is mounted on the processing table (11), and the module (13) is mounted on the support frame (12). The lifting mechanism (2) includes a first cylinder (21), a lifting block (22) and a push rod (23). The first cylinder (21) is mounted on the support frame (12). The lifting block (22) is mounted on the piston rod of the first cylinder (21). The push rod (23) is mounted on the lifting block (22). The module (13) has a first through hole for the push rod (23) to slide. The processing table (11) is provided with an installation guide mechanism (5), which includes a moving block (51), a second cylinder (52), a third cylinder (53), a support block (54), a tray (55), a clamping adjustment block (56), a first adjustment component (57), and a second adjustment component (58). The second cylinder (52) is mounted on the processing table (11), and the moving block (51) is mounted on the piston rod of the second cylinder (52); The third cylinder (53) is mounted on the moving block (51), and the support block (54) is mounted on the piston rod of the third cylinder (53). A sixth through hole is provided on the support block (54). The tray (55) is mounted on the support block (54) via the first adjustment component (57), and the tray (55) can cover the sixth through hole; Two clamping adjustment blocks (56) are provided, and the second adjustment component (58) is provided on the support block (54), and both clamping adjustment blocks (56) are connected to the second adjustment component (58); The support frame (12) includes a base plate (121), a top plate (122) and a support column (123), the support column (123) connecting the base plate (121) and the top plate (122), and the base plate (121) being mounted on the processing table (11); The first cylinder (21) is mounted on the base plate (121), the lifting block (22) is located between the base plate (121) and the top plate (122), and the top plate (122) is provided with a second through hole for the top rod (23) to slide. The module (13) is provided with a connecting mechanism (3) that connects to the top plate (122). The connecting mechanism (3) includes a connecting post (31) and a first connecting bolt (32). The connecting post (31) is provided on the top plate (122), and the module (13) is provided with a connecting groove that engages with the connecting post (31). The first connecting bolt (32) passes through the top plate (122) and is threadedly connected to the module (13). The cross-section of the second through hole is larger than the cross-section of the push rod (23). A cleaning mechanism (4) is provided on the top plate (122). The cleaning mechanism (4) includes two cleaning blocks (41) and a fourth connecting bolt (42). The fourth connecting bolt (42) passes through the cleaning blocks (41) and is threadedly connected to the top plate (122). Both cleaning blocks (41) abut against the side wall of the top rod (23) at the ends away from the top plate (122).

2. The workpiece auxiliary paint spraying jig according to claim 1, wherein The lifting block (22) includes a first connecting block (221), a second connecting block (222), and a second connecting bolt (223). The first connecting block (221) abuts against the second connecting block (222), and the second connecting bolt (223) passes through the first connecting block (221) and is threadedly connected to the second connecting block (222). The first connecting block (221) is located between the second connecting block (222) and the base plate (121). The first connecting block (221) has a third through hole through which the piston rod of the first cylinder (21) passes. The second connecting block (222) has a fourth through hole and a third connecting bolt (24) is provided on the second connecting block (222). The third connecting bolt (24) passes through the fourth through hole and is threadedly connected to the piston rod of the first cylinder (21) located in the third through hole. The second connecting block (222) has a stabilizing groove at one end near the first connecting block (221). The second connecting block (222) has a fifth through hole communicating with the stabilizing groove. A stabilizing block (25) is engaged in the stabilizing groove. One end of the top rod (23) passes through the fifth through hole and is connected to the stabilizing block (25).

3. The workpiece auxiliary painting fixture according to claim 1, characterized in that, The processing table (11) is provided with an active rotation mechanism (6), which includes a rotating shaft (61), a rotating block (62), and a drive assembly (63). The rotating shaft (61) is rotatably connected to the processing table (11), the rotating block (62) is disposed on the rotating shaft (61), and the support frame (12) is disposed on the rotating block (62); The drive assembly (63) is mounted on the processing table (11) and connected to the rotating shaft (61).

4. The workpiece auxiliary painting fixture according to claim 1, characterized in that, The module (13) is provided with a negative pressure adsorption component (7), which includes a negative pressure pump, a connecting pipe (71) and an air extraction pipe (72). The negative pressure pump is provided on the processing table (11), the air extraction pipe (72) is provided on the module (13), and the connecting pipe (71) connects the negative pressure pump and the air extraction pipe (72).

5. A process for overcoating a workpiece, characterized by, Includes the following steps: S1: First, place the workpiece on the auxiliary fixture (1) in claim 1 and then spray paint it; S2: Transfer the painted workpiece into the drying oven for drying; S3: Cool the dried workpiece; S4: Trim the cooled workpiece to form the final product.

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