A production process of nailing welding for automobile parts

Abstract

The invention relates to a production process for implanting nail welding of automobile parts, belonging to the technical field of implanting nail welding of automobile parts. The implanting nail is installed in a sleeve, and then the sheet metal to be welded is covered so that the implanting nail contacts the sheet metal, and the two are welded together by high-temperature melting. The implanting nail welding and spot welding are done in a pair of clamps, and the spot welding and implanting nail welding can be completed in one process, thereby reducing the complexity of the process. Then the entire area to be welded of the sheet metal to be welded is divided into N first welding areas in the direction from one end to the other end, and the N first welding areas are sequentially numbered as 1, 2, 3...N, and then the N first welding areas are divided into N / 2 second welding areas in pairs, so that the distance between the two first welding areas in each group of second welding areas is the same. After the welding is completed, the entire part formed by the implanting nail and the sheet metal to be welded is ejected by a lifting mechanism, thereby reducing the deformation of the parts.

Description

Technical Field

[0001] The invention belongs to the technical field of nail implantation welding of automobile parts, and in particular relates to a production process of nail implantation welding of automobile parts. Background Art

[0002] Pinning welding is a special welding method, which is to plant prefabricated nail-shaped weldments (pinning nails) on the workpiece, and then weld the pins and the workpiece together to achieve connection. In the production process of automotive parts, pinning welding is mainly used to achieve a firm connection between body parts, such as the connection between the roof and the body, the connection between the door and the body, etc. In the process of pinning welding production process of automotive parts, the sleeve is usually fixed on the fixture first, and then the pin is installed into the movable sleeve, and then the sheet metal to be welded is covered, so that the pin is in contact with the plate, and the two are welded together by high-temperature melting.

[0003] However, there are some problems in the production process of nail implant welding of automobile parts: after the welding of automobile parts by nail implant welding is completed, the nail is still in the sleeve and needs to be removed. However, due to the high heat generated during the nail implant welding process, the material of the sleeve itself may be greatly thermally affected. The thermal expansion may make the bond between the nail and the sleeve tighter or generate more friction, making it more difficult to disassemble, and ultimately causing the automobile parts to be easily deformed during disassembly. In this regard, a production process of nail implant welding of automobile parts is proposed. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a production process for pinning welding of automobile parts, which solves the problem that the heat generated during the pinning welding process in the prior art is relatively large, which may cause a large thermal impact on the material of the sleeve itself, and the thermal expansion may make the connection between the pin and the sleeve tighter or generate more friction, making it more difficult to disassemble, and ultimately causing the automobile parts to be easily deformed during disassembly.

[0005] The purpose of the present invention can be achieved by the following technical solution: A production process for implanting and welding automotive parts, comprising the following steps:

[0006] S1: When welding, first install the pin into the sleeve, then cover the sheet metal to be welded, and use the pressure of the welding gun to drive the sleeve to move upward against the flange edge of the pin, so that the pin contacts the sheet metal, and the two are welded together by high temperature melting;

[0007] S2: Divide the entire area to be welded of the sheet metal to be welded into N first welding areas in a direction from one end to the other end, and label the N first welding areas as 1, 2, 3, ... N in sequence, and then divide the N first welding areas into groups of two each into N / 2 second welding areas, so that the distance between two first welding areas in each group of second welding areas is the same;

[0008] S3: welding the two first welding areas in each group of second welding areas respectively, starting from the central area of ​​the two first welding areas and gradually expanding outwards to ensure uniform heat distribution, giving the same cooling time to each group of second welding areas, and then welding the next part;

[0009] S4: After welding is completed, the entire part formed by the implant pin and the sheet metal part to be welded is ejected through the lifting mechanism designed on the sleeve to prevent deformation of the parts.

[0010] As a further solution of the present invention, in S1, the nailing welding and the spot welding are performed in a pair of fixtures, so that the spot welding and the nailing welding can be completed in one process.

[0011] As a further solution of the present invention, the sheet metal parts to be welded in S1 are clamped and fixed by a clamp, the clamp is provided with a fixing block, and the sleeve is installed on the fixing block of the clamp.

[0012] As a further solution of the present invention, a clearance fit is adopted between the sleeve and the fixing block of the clamp, and the sleeve falls back by its own weight when welding is completed.

[0013] As a further solution of the present invention, after the implanting nails are installed into the sleeve in S1, the large plane of the sheet metal to be welded is selected as the working plane, and the remaining parts with inclined angles are provided with cylinders, and the jacking mechanism is driven by the cylinders to separate the sleeve from the implanting nails.

[0014] As a further solution of the present invention, when welding two first welding areas in each group of second welding areas in S3, the distance between the welding gun and the area to be welded is always the same.

[0015] As a further solution of the present invention, the lifting mechanism includes a rotating part connected to the cylinder, a spring part and a lifting part for driving the sleeve to disengage from the implant nail, the clamp is arranged on the support frame, the lifting part slides through the support frame, the spring part is sleeved on the lifting part between the lifting part and the support frame, the rotating part is provided with a plurality of protrusions, the lifting part is provided with grooves matching with the plurality of protrusions, the cylinder drives the rotating part to rotate, the rotating part drives the protrusion to disengage from or limit the groove, the spring part cooperates with the protrusion and the groove, so that the lifting part vibrates to lift the implant nail.

[0016] As a further solution of the present invention, the plurality of protrusions of the lifting portion are hemispherical protrusions, and the grooves matching with the plurality of protrusions are hemispherical grooves.

[0017] As a further solution of the present invention, the hemispherical protrusions and hemispherical grooves are both distributed in an annular shape.

[0018] As a further solution of the present invention, the radius of the hemispherical groove and the hemispherical protrusion is greater than or equal to the length of the implant nail.

[0019] The beneficial effects of the present invention are:

[0020] The pin is placed into a sleeve and then covered with a sheet metal to be welded. The sleeve is driven by the pressure of the welding gun to move upward against the flange of the pin, so that the pin contacts the plate, and the two are welded together by high-temperature melting. The pin welding and spot welding are done in a pair of fixtures. Spot welding and pin welding can be completed in one process, thereby reducing the complexity of the process. Then, the entire welding area of ​​the sheet metal to be welded is divided into N first welding areas from one end to the other end, and the N first welding areas are numbered 1, 2, 3...N in sequence. Then, the N first welding areas are divided into N / 2 second welding areas in pairs, so that each group of first welding areas has N / 2 second welding areas. The distances between the two first welding areas in the second welding area are the same, and the two first welding areas in each group of the second welding areas are welded separately, starting from the central area of ​​the two first welding areas and gradually expanding outward to ensure uniform heat distribution. After welding is completed, the entire part formed by the implant nail and the sheet metal to be welded is ejected through the jacking mechanism, thereby reducing the deformation of the parts. Not only does it reduce the large amount of heat generated during the implant nail welding process that causes a greater thermal impact on the material of the sleeve itself, but it also cooperates with the jacking mechanism used to prevent the deformation of the parts to eject the entire part formed by the implant nail and the sheet metal to be welded, thereby reducing the deformation of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the common spot welding process;

[0023] Figure 2 It is a schematic diagram of nailing welding and spot welding in one process of the present invention;

[0024] Figure 3 It is a schematic diagram of the overall placement of the sheet metal parts of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the lifting mechanism of the present invention;

[0026] Figure 5It is a top view of the rotating part of the present invention.

[0027] Description of main component symbols:

[0028] In the figure: 1. upper electrode; 2. lower electrode; 3. sleeve; 4. sheet metal; 5. implant nail; 6. spring pin; 7. fixing block; 8. support frame; 9. upper plate; 10. lower plate; 11. fixture; 12. cylinder; 13. rotating part; 14. spring part; 15. lifting part; 16. protrusion; 17. groove. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0030] See also Figure 1-5 This embodiment provides a production process for stud welding of automotive parts, comprising the following steps:

[0031] S1: When welding, first install the pin 5 into the sleeve 3, then cover the sheet metal 4 to be welded, and drive the sleeve 3 to move upward against the flange edge of the pin 5 through the pressure of the welding gun, so that the pin 5 contacts the plate, and the two are welded together by high-temperature melting; when welding parts with higher strength requirements such as automobile seat frames, automobile bumpers and front-end modules, automobile interior parts (such as door interior panels, instrument panels), automobile body structure reinforcement ribs and brackets, both pin welding and spot welding are needed, and the current existing technology of pin welding and spot welding is carried out in two processes, such as Figure 1 In addition, the nail implanting welding is single-sided arc welding, and the spot welding is double-sided conductive welding. The spot welding gun is used to weld the nail implanting 5. The length of the nail implanting 5 used is 20mm, plus the thickness required by the mechanism, which means that the discharge distance of the welding gun should be around 30mm. After multiple rounds of physical verification, the power supply is normal, the current intensity is not significantly weakened, the size of the molten core is qualified, and the conditions for welding the nail implanting 5 are met. Therefore, the nail implanting welding and spot welding are done in a pair of fixtures 11, and spot welding and nail implanting welding can be completed in one process, thereby reducing the complexity of the process, such as Figure 2 As shown;

[0032] S2: Divide the entire area to be welded of the sheet metal part 4 to be welded into N first welding areas in the direction from one end to the other end, and mark the N first welding areas as 1, 2, 3...N in sequence, and then divide the N first welding areas into groups of two into N / 2 second welding areas, so that the distance between the two first welding areas in each group of second welding areas is the same. If N is an odd number here, divide the entire area to be welded into N first welding areas from left to right or from right to left, remove the first welding area in the middle, and then divide the N first welding areas into groups of two into N / 2 second welding areas. If N is an even number, the N first welding areas can be directly divided into groups of two into N / 2 second welding areas. In addition, the width of each first welding area needs to be designed according to the width of each welding of the welding gun used for welding, to ensure that there is no overlap of the previous and next welding areas in each welding area;

[0033] S3: Weld the two first welding areas in each group of second welding areas separately, start welding from the center area of ​​the two first welding areas, and gradually expand outward to ensure uniform heat distribution. Since the length of cooling time will affect the hardness and toughness of the weld, the same cooling time is given to each group of second welding areas before welding the next part. In addition, since the heat generated during the nail implanting welding process is relatively large, and the welded parts are automobile parts, different automobile parts may be made of different materials, such as ordinary steel, high-strength steel, aluminum alloy, etc., and the welding parameters and processes required for these materials during welding are not completely the same, so when using nail implanting welding, in order to minimize the deformation of automobile parts, the two first welding areas in each group of second welding areas are welded separately, starting welding from the center area of ​​the two first welding areas, and gradually expanding outward to ensure uniform heat distribution; in addition, in order to further ensure uniform welding and uniform heating, when welding the two first welding areas in each group of second welding areas, the distance between the welding gun and the area to be welded is always the same;

[0034] S4: After welding is completed, the entire part formed by the implant nail 5 and the sheet metal part 4 to be welded is ejected through the jacking mechanism designed on the sleeve 3 to prevent deformation of the parts, and the entire part formed by the implant nail 5 and the sheet metal part 4 to be welded is separated from the sleeve 3 through the jacking mechanism, thereby reducing deformation of the parts.

[0035] At present, nailing welding and spot welding are often used in the welding process of automobile parts. Spot welding is a kind of resistance welding. It transmits current to the welding workpiece through two electrodes, so that the contact surface of the workpiece generates resistance heat, thereby locally melting the metal, and forming a weld after cooling, so as to connect two metal parts together. Spot welding is often used for welding thin plate parts in the production process of automobile parts, and nailing welding is a special welding method. It is to plant a prefabricated nail-shaped weldment (nail 5) on the workpiece, and then weld the nail 5 and the workpiece together by welding to achieve connection. In the production process of automobile parts, nailing welding is mainly used to achieve a firm connection of body parts, such as the connection between the roof and the body, the connection between the door and the body, etc. In nailing welding of automobile parts In the process of the nail-planting welding production process, the sleeve 3 is usually first fixed on the clamp 11, and then the nail 5 is installed in the movable sleeve, and then the sheet metal part 4 to be welded is covered so that the nail is in contact with the plate, and the two are welded together by high-temperature melting. However, there are some problems in the process of the nail-planting welding production process of automobile parts. For example, after the automobile parts are welded by nail-planting welding, the nail 5 is still in the sleeve 3, and the nail 5 needs to be taken out. However, due to the high heat generated during the nail-planting welding process, the material of the sleeve 3 itself may be greatly thermally affected, and the thermal expansion may make the combination between the nail 5 and the sleeve 3 tighter or generate more friction, making it more difficult to disassemble, and ultimately causing the automobile parts to be easily deformed during disassembly.

[0036] In order to solve the above problems, in this embodiment, the nail 5 is first installed in the sleeve 3, and then the sheet metal part 4 to be welded is covered, and the sleeve 3 is driven by the pressure of the welding gun to move upward against the flange edge of the nail 5, so that the nail 5 is in contact with the plate, and the two are welded together by high-temperature melting, and the nail welding and spot welding are done in a pair of clamps 11. Spot welding and nail welding can be completed in one process, thereby reducing the complexity of the process, and then the entire welding area of ​​the sheet metal part 4 to be welded is divided into N first welding areas in the direction from one end to the other end, and the N first welding areas are numbered 1, 2, 3...N in sequence, and then the N first welding areas are divided into N / 2 second welding areas in pairs. The connection area is made so that the distance between the two first welding areas in each group of second welding areas is the same, and the two first welding areas in each group of second welding areas are welded respectively, starting from the central area of ​​the two first welding areas, and gradually expanding outward to ensure uniform heat distribution. After the welding is completed, the entire part formed by the implanting nail 5 and the sheet metal part 4 to be welded is ejected through the jacking mechanism, thereby reducing the deformation of the parts. Not only does it reduce the large amount of heat generated during the implanting nail welding process that causes a greater thermal impact on the material of the sleeve 3 itself, but it also cooperates with the jacking mechanism used to prevent the deformation of the parts to eject the entire part formed by the implanting nail 5 and the sheet metal part 4 to be welded, thereby reducing the deformation of the parts.

[0037] In order to enable the sleeve 3 to better support the sheet metal 4 and provide a fulcrum for the nail 5, so as to facilitate the integration of the nail 5 with the automobile parts, in one embodiment, the sheet metal 4 to be welded in S1 is clamped and fixed by a clamp 11, and a fixing block 7 is provided on the clamp 11. The sleeve 3 is installed on the fixing block 7 of the clamp 11. The specific installation positions of the clamp 11, the fixing block 7 and the sleeve 3 can also be adjusted according to the actual installation conditions. Figure 2 As shown, in addition, Figure 1 In the conventional spot welding process, an upper electrode 1, a lower electrode 2, an upper plate 9 and a lower plate 10 are required, the upper plate 9 and the lower plate 10 are bonded together, and the upper electrode 1 and the lower electrode 2 are bonded to the upper plate 9 and the lower plate 10 respectively, so as to perform spot welding. However, the nailing welding of the present application includes spot welding and nailing welding, such as Figure 2 In this embodiment, in addition to the sleeve 3, sheet metal 4, implanting nail 5, and fixing block 7 on the clamp 11 mentioned above, this implanting nail welding also needs to include a spring pin 6, an upper electrode 1, and a lower electrode 2. The upper electrode 1 and the lower electrode 2 are respectively attached to the sheet metal 4 and the bottom of the sleeve 3, and the spring pin 6 is located at the left end of the sleeve 3. When the spring pin 6 contacts the sleeve 3, the movement of the sleeve 3 can be restricted. When the welding is completed, the spring pin 6 is removed, the spring pin 6 is separated from the sleeve 3, and the sleeve 3 is released from the limit.

[0038] In addition, after welding, the nail 5 is still located in the sleeve 3. If external force is used to forcibly separate the nail 5 from the sleeve 3, the vibration force may cause deformation of the components. In this regard, in one embodiment, a clearance fit is adopted between the sleeve 3 and the fixing block 7 of the clamp 11. When welding is completed, the sleeve 3 falls back by its own weight. After welding, the clamp 11 is loosened. At this time, the sleeve 3 falls back by its own weight to separate the nail 5 from the sleeve 3, thereby reducing the risk of deformation of components.

[0039] Furthermore, since the target is automobile parts, the shapes of the sheet metal parts 4 of automobile parts are mostly irregular. Therefore, in order to make welding easier, in one embodiment, after the implant nail 5 is installed into the sleeve 3 in S1, the large plane of the sheet metal part 4 to be welded is selected as the working plane, and the remaining parts with inclined angles are provided with cylinders 12, such as Figure 3 As shown, the lifting mechanism is driven by the cylinder 12 to disengage the sleeve 3 from the nail 5. In addition, the clamping of the clamp 11 is also driven by the cylinder 12. The large plane of the sheet metal part 4 is used as the working plane to make welding easier. The remaining parts with inclined angles are provided with the cylinder 12, and the sleeve 3 can be disengaged from the nail 5 by withdrawing the cylinder 12.

[0040] It is worth mentioning that, due to the high heat generated during the nail welding process, the material of the sleeve 3 itself may be greatly thermally affected, which may make the connection between the nail 5 and the sleeve 3 tighter or generate more friction. Under normal circumstances, the nail 5 and the sleeve 3 can be separated by the sleeve 3 falling back by its own weight. However, if the connection between the nail 5 and the sleeve 3 is too tight, the cylinder 12 is used to drive the jacking mechanism to eject the entire part formed by the nail 5 and the sheet metal part 4 to be welded. However, if an ordinary jacking mechanism is used, then during jacking, since the parts have just been welded and the parts themselves are easily deformed, the jacking at this time is more likely to cause deformation of the parts. In order to solve this problem, in one embodiment, the jacking mechanism includes a rotating part 13 connected to the cylinder 12, a spring part 14 and a jacking part 15 for driving the sleeve 3 to separate from the nail 5. Figure 4 As shown, the rotating part 13 is a rotating rod, a gear is sleeved on the rotating rod, a rack for driving the gear to rotate is installed at the end of the cylinder 12, the spring part 14 is a spring, the lifting part 15 is a lifting rod, one end of the lifting rod slides through the bottom of the sliding sleeve, and the lifting rod is located directly below the planting nail 5, the clamp 11 is set on the support frame 8, the lifting part 15 slides through the support frame 8, the spring part 14 is sleeved on the lifting part 15 between the lifting part 15 and the support frame 8, and a plurality of protrusions 16 are provided on the rotating part 13. The lifting part 15 is provided with grooves 17 which cooperate with a plurality of protrusions 16. The cylinder 12 drives the rotating part 13 to rotate, and the rotating part 13 drives the protrusions 16 to disengage or limit the grooves 17. The spring part 14 cooperates with the protrusions 16 and the grooves 17 to make the lifting part 15 tremble and lift the nail 5. When the cylinder 12 moves, it drives the gear to rotate, and the gear drives the rotating rod to rotate. The protrusions 16 on the rotating rod are disengaged from the grooves 17, and the spring is compressed. At this time, the lifting part 15 rises, and then the rotating rod continues to rotate. When the rotating rod is When the projection 16 is stuck in the groove 17, the spring recovers its deformation, and the lifting part 15 descends at this time, so that the lifting part 15 repeatedly lifts the nail 5 back and forth, so that the nail 5 and the sleeve 3 are separated. In addition, when the projection 16 on the rotating rod is stuck in the groove 17, this is the starting state. Since the spring and the projection 16 are repeatedly stuck in the groove 17 and cooperate with each other, a vibration force will be given to the lifting rod, which will cause the lifting rod to tremble and rise, and the lifting rod passes through the position of the support frame 8 and the bottom of the sliding sleeve. The holes on the support frame 8 and the bottom of the sliding sleeve are larger than the diameter of the lifting rod. The lifting rod slides through the holes on the support frame 8 and the bottom of the sliding sleeve. The trembling and rising of the lifting rod can make a swinging force between the nail 5 and the sleeve 3, which makes it easier to separate the nail 5 from the sleeve 3, avoiding the use of direct lifting to forcibly separate the nail 5 from the sleeve 3 and cause deformation of the parts. Therefore, the trembling and rising of the lifting rod here solves the problem that the lifting at this time is more likely to cause deformation of the parts because the parts have just been welded and the parts themselves are easy to deform.

[0041] Furthermore, in order to make the lifting part 15 have a better effect when lifting the nail 5 and better make the nail 5 separate from the sleeve 3, in one embodiment, the plurality of protrusions 16 of the lifting part 15 are hemispherical protrusions 16, and the grooves 17 matched with the plurality of protrusions 16 are hemispherical grooves 17. Through the hemispherical protrusions 16 and the hemispherical grooves 17, it can be ensured that each time the lifting part 15 is lifted, the hemispherical protrusions 16 can be well matched with the hemispherical grooves 17 and the friction resistance is small, thereby reducing the interference of the friction resistance. When the protrusion 16 and the hemispherical groove 17 cooperate, the hemispherical protrusion 16 is more likely to detach from the hemispherical groove 17 and get stuck in the hemispherical groove 17. Therefore, the design of the hemispherical protrusion 16 and the hemispherical groove 17 needs to be regular and the hemispherical protrusion 16 can return to the hemispherical groove 17 after moving a small part. Therefore, the hemispherical protrusion 16 and the hemispherical groove 17 are both distributed in an annular shape, and the radius of the hemispherical groove 17 and the hemispherical protrusion 16 is greater than or equal to the length of the implant nail 5. This limitation is to enable the implant nail 5 to be completely pushed out of the sleeve 3 when the lifting part 15 is lifted.

[0042] The working principle and use process of the present invention:

[0043] First, the implanting nail 5 is installed into the sleeve 3, and then the sheet metal 4 to be welded is covered. The sleeve 3 is driven by the pressure of the welding gun to move upward against the flange edge of the implanting nail 5, so that the implanting nail 5 contacts the plate, and the two are welded together by high-temperature melting. The implanting nail welding and spot welding are done in a pair of clamps 11. Spot welding and implanting nail welding can be completed in one process, thereby reducing the complexity of the process. Then, the entire area to be welded of the sheet metal 4 to be welded is divided into N first welding areas from one end to the other end, and the N first welding areas are numbered 1, 2, 3...N in sequence. Then, the N first welding areas are divided into N / 2 second welding areas in pairs, so that the distance between the two first welding areas in each group of second welding areas is the same, and the two first welding areas in each group of second welding areas are welded respectively, and the welding starts from the central area of ​​the two first welding areas and gradually expands outward to ensure uniform heat distribution.

[0044] When welding is completed, the gear is driven to rotate by the movement of the cylinder 12, and the gear drives the rotating rod to rotate. The protrusion 16 on the rotating rod disengages from the groove 17, and the spring is compressed. At this time, the lifting part 15 rises, and then the rotating rod continues to rotate. When the protrusion 16 on the rotating rod is stuck in the groove 17, the spring recovers its deformation, and the lifting part 15 descends, so that the lifting part 15 repeatedly lifts the implant nail 5 back and forth, so that the implant nail 5 is separated from the sleeve 3.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A production process for implanting and welding automotive parts, characterized in that: The following steps are involved: S1: When welding, first install the pin into the sleeve, then cover the sheet metal to be welded, and use the pressure of the welding gun to drive the sleeve to move upward against the flange edge of the pin, so that the pin contacts the sheet metal, and the two are welded together by high temperature melting; S2: Divide the entire area to be welded of the sheet metal to be welded into N first welding areas in a direction from one end to the other end, and label the N first welding areas as 1, 2, 3, ... N in sequence, and then divide the N first welding areas into groups of two each into N / 2 second welding areas, so that the distance between two first welding areas in each group of second welding areas is the same; S3: welding the two first welding areas in each group of second welding areas respectively, starting from the central area of ​​the two first welding areas and gradually expanding outwards to ensure uniform heat distribution, giving the same cooling time to each group of second welding areas, and then welding the next part; S4: After welding is completed, the entire part formed by the implant nail and the sheet metal part to be welded is ejected through the lifting mechanism designed on the sleeve to prevent deformation of the parts; The sheet metal to be welded in S1 is clamped and fixed by a fixture, the fixture is provided with a fixing block, and the sleeve is installed on the fixing block of the fixture; After the implanting nail is installed into the sleeve in S1, the large plane of the sheet metal to be welded is selected as the working plane, and the remaining parts with inclined angles are provided with cylinders, and the jacking mechanism is driven by the cylinders to separate the sleeve from the implanting nail; The lifting mechanism includes a rotating part connected to the cylinder, a spring part and a lifting part for driving the sleeve to disengage from the implant nail, the clamp is arranged on the support frame, the lifting part slides through the support frame, the spring part is sleeved on the lifting part between the lifting part and the support frame, a plurality of protrusions are provided on the rotating part, and a plurality of grooves matching with the plurality of protrusions are provided on the lifting part, the cylinder drives the rotating part to rotate, the rotating part drives the protrusion to disengage from or limit the groove, and the spring part cooperates with the protrusion and the groove to make the lifting part vibrate and lift the implant nail.

2. The process for producing automotive parts by implanting and welding according to claim 1, characterized in that: In the above S1, the nailing welding and the spot welding are performed in a set of fixtures, so that the spot welding and the nailing welding can be completed in one process.

3. The process for producing automotive parts by implanting and welding according to claim 1, characterized in that: The sleeve and the fixing block of the fixture are clearance-matched, and the sleeve falls back by its own weight when welding is completed.

4. The process for producing automotive parts by implanting and welding according to claim 1, characterized in that: After the implanting nail is installed into the sleeve in S1, the large plane of the sheet metal to be welded is selected as the working plane, and the remaining parts with inclined angles are provided with cylinders, and the jacking mechanism is driven by the cylinders to separate the sleeve from the implanting nail.

5. The process for producing automotive parts by implanting and welding according to claim 1, characterized in that: When welding two first welding areas in each group of second welding areas in S3, the distance between the welding gun and the area to be welded is always the same.

6. The process for producing automotive parts by implanting and welding according to claim 1, characterized in that: The plurality of protrusions on the lifting part are hemispherical protrusions, and the grooves matched with the plurality of protrusions are hemispherical grooves.

7. The process for producing automotive parts by implanting and welding according to claim 6, characterized in that: The hemispherical protrusions and hemispherical grooves are both distributed in a ring shape.

8. The process for producing automotive parts by implanting and welding according to claim 6, characterized in that: The radius of the hemispherical groove and the hemispherical protrusion is greater than or equal to the length of the implant nail.

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