Spot welding clamp tool for rear door C column outer plate and guide rail

Abstract

The utility model belongs to the field of clamps, and provides a spot welding clamp tool for a rear door C-column outer plate and a guide rail, which comprises a tool plate, a plurality of supporting pieces, a clamping groove formed in the guide rail, and a clamping groove formed in the guide rail and used for extending into the clamping groove to limit the guide rail in a horizontal posture; the positioning piece and the adjusting piece are arranged on the tool plate, and a magnetic attraction block located at one end of the guide rail is installed on the positioning piece. Compared with the prior art, the device has the advantages that the magnetic attraction block is matched with the adjustable abutting block to ensure that the guide rail is kept at the correct horizontal position and does not deviate in the whole welding process, meanwhile, the profiling block arranged in a height difference mode is matched with the positioned guide rail to achieve the stable supporting effect on an outer plate, and the welding quality is improved. And finally, under the positioning and pressing action of the positioning pin and the pressing mechanism, it is ensured that the outer plate and the guide rail are located at the needed welding positions, the manual adjustment time is shortened, the production efficiency is improved, and meanwhile it is ensured that the quality after welding can meet the assembling precision requirement of subsequent products.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of fixture, concretely relates to a spot welding fixture fro rear door C column outer plate and guide rail. BACKGROUND

[0002] In the modern automobile manufacturing process, the safety and stability of the body structure is a crucial design consideration, especially when the vehicle is in collision, the strength of the body structure is directly related to the safety of the passengers, and the outer plate and the guide rail between the rear door C column as an important part of connecting the body side and the rear wall, the accurate welding is particularly key to ensure the safety and integrity of the entire body structure.

[0003] The traditional manual welding or semi-automatic welding method has the following disadvantages:

[0004] 1. Low position accuracy: lack of effective fixing device, leading to deviation between the outer plate and the guide rail during welding, thereby affecting the assembly accuracy of the final product.

[0005] 2. Low production efficiency: more manual intervention is required (manual adjustment is required), which not only increases labor cost, but also limits the speed of the production line. INVENTION CONTENTS

[0006] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a spot welding fixture for the outer plate and the guide rail of the rear door C column, which can ensure the correct relative position of the outer plate and the guide rail during welding, improve the welding accuracy and efficiency, and reduce the rate of defective products.

[0007] The utility model solves the technical problems by adopting the technical scheme of providing a spot welding fixture for the outer plate and the guide rail of the rear door C column, comprising: a fixture plate, configured with a plurality of supporting pieces, a clamping groove is formed in the guide rail, the supporting pieces are used to extend into the clamping groove to limit the guide rail in a horizontal posture;

[0008] A positioning piece and an adjusting piece are arranged on the fixture plate, a magnetic block is arranged on the positioning piece and located at one end of the guide rail; a pressing block is movably arranged on the adjusting piece, the pressing block is movably abutted to the end of the guide rail away from the magnetic block, so as to push the guide rail to be movably abutted to the magnetic block along the horizontal direction relative to the supporting piece;

[0009] The profiled block and the positioning pin arranged with height difference are arranged on the fixture plate and located at one side of the adjusting piece, the outer plate is arranged in a stepped manner, the profiled block can be supported on the bottom wall of the outer plate step together with the guide rail when the positioning pin is movably penetrated through the outer plate;

[0010] A pressing mechanism is arranged on the jig plate, and is used to press the outer wall at the stepped portion of the outer plate and abut against the side wall of the outer plate to limit displacement of the outer plate relative to the guide rail.

[0011] In the above-described spot welding jig tool for the rear door C-pillar outer plate and guide rail, the adjusting member further comprises:

[0012] A fixed support is arranged on the jig plate, and the profiling block is mounted on the fixed support;

[0013] An installation block is connected to one end of the fixed support, and an installation slot is formed in the other end, and the abutting block is movably clamped in the installation slot;

[0014] An elastic member is movably sleeved on the abutting block, and one end of the elastic member abuts against the side wall of the installation block, and the other end abuts against the extension block.

[0015] In the above-described spot welding jig tool for the rear door C-pillar outer plate and guide rail, the supporting member comprises:

[0016] A base is arranged on the jig plate;

[0017] A supporting block and a limiting block are both mounted on the base, an end of the supporting block is formed with a guide portion, the guide portion is used to extend into the clamping slot, and the limiting block and the guide portion jointly form an anti-disengagement cavity, and one side wall of the guide rail is movably clamped in the anti-disengagement cavity.

[0018] In the above-described spot welding jig tool for the rear door C-pillar outer plate and guide rail, a locking hole is formed in the bottom wall of the installation slot, a waist-shaped hole is formed in the abutting block, a locking member is movably arranged in the waist-shaped hole, and the locking member is used to be connected in the locking hole to limit displacement of the abutting block.

[0019] In the above-described spot welding jig tool for the rear door C-pillar outer plate and guide rail, the positioning member further comprises:

[0020] An installation bracket is arranged on the jig plate;

[0021] An installation plate is connected to one end of the installation bracket, and the other end is used to mount the magnetic block;

[0022] A positioning baffle is arranged on the side of the installation bracket away from the installation plate, an end of the positioning baffle is formed with an L-shaped reference block, and an end of the outer plate is movably abutted against the L-shaped reference block.

[0023] In the point welding clamp tool for the rear door C column outer plate and guide rail, adjusting shims are assembled between the mounting frames and the mounting plates or the positioning baffle plates.

[0024] In the point welding clamp tool for the rear door C column outer plate and guide rail, guide blocks are obliquely arranged on the tool plates, guide sleeves are mounted in the guide blocks, and positioning pins are connected to the driving ends of the driving members, so that the positioning pins are driven to be movably inserted into the guide sleeves and pass through the through holes in the side walls of the outer plates.

[0025] In the point welding clamp tool for the rear door C column outer plate and guide rail, the pressing mechanism comprises:

[0026] A support frame is arranged on the tool plate.

[0027] A pressing cylinder is mounted on the support frame in the horizontal direction, an installation base plate is connected to the output end of the pressing cylinder, one end of a pressing block is connected to the side wall of the installation base plate, and the other end of the pressing block is used to movably press the outer wall at the step of the outer plate.

[0028] In the point welding clamp tool for the rear door C column outer plate and guide rail, the pressing mechanism further comprises first and second outer abutting columns arranged in a height difference, the first and second outer abutting columns are arranged on the installation base plate, first and second inner abutting columns are mounted on the fixed support, the first inner abutting column is in the same straight line as the first outer abutting column and abuts against the inner and outer walls at the bottom end of the outer plate, and the second inner abutting column is in the same straight line as the second outer abutting column and abuts against the inner and outer walls at the top end of the outer plate.

[0029] Compared with the prior art, the point welding clamp tool for the rear door C column outer plate and guide rail has the following beneficial effects:

[0030] (1) The point welding clamp tool for the rear door C column outer plate and guide rail can ensure that the guide rail maintains a correct horizontal position during the whole welding process and does not deviate, can use the profiled blocks arranged in a height difference to stably support the outer plate in cooperation with the positioned guide rail, can ensure that the outer plate and the guide rail are in the required welding position under the positioning and pressing of the positioning pins and the pressing mechanism, has a simple overall structure, reduces the time for manual adjustment, improves the production efficiency, and ensures that the quality after welding can meet the assembly precision requirements of subsequent products.

[0031] (2) The guide part on the support block can support the guide rail and guide the guide rail to be closely attached to the magnetic block in the horizontal direction, and the abutting of the guide rail to the magnetic block in cooperation with the abutting of the anti-disengagement cavity and the limiting block can ensure the stability of the guide rail during the welding process.

[0032] (3) The two groups of outer and inner abutting columns arranged linearly and having height difference cooperate with each other, can realize all-directional clamping and fixing of the outer plate by cooperating with the pressing block, and can effectively avoid damage to the quality of the outer plate or even the phenomenon of scrapping caused by stress concentration during pressing and fixing. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a perspective view of the present application;

[0034] Figure 2 is a schematic view of the mounting structure of the supporting member, the positioning member and the adjusting member on the tooling plate;

[0035] Figure 3 is an exploded view between the mounting block and the abutting block;

[0036] Figure 4 is a schematic view of the mounting structure of the profiling block, the positioning pin and the pressing mechanism on the tooling plate.

[0037] In the figure, 10 is an outer plate; 11 is a guide rail; 110 is a clamping groove;

[0038] 2 is a tooling plate; 20 is a guide block; 200 is a guide sleeve; 21 is a driving member;

[0039] 3 is a supporting member; 30 is a base; 31 is a supporting block; 310 is a guide part; 32 is a limiting block; 330 is an anti-dropping cavity;

[0040] 4 is a positioning member; 40 is a magnetic attraction block; 41 is a mounting frame; 42 is a mounting plate; 43 is a positioning baffle; 430 is an L-shaped reference block; 440 is an adjusting gasket;

[0041] 5 is an adjusting member; 50 is an abutting block; 500 is an extension block; 501 is a waist-shaped hole; 502 is a locking member; 51 is a fixed support; 510 is a first inner abutting column; 511 is a second inner abutting column; 52 is a mounting block; 520 is a mounting groove; 521 is a locking hole; 53 is an elastic member;

[0042] 6 is a profiling block;

[0043] 7 is a positioning pin;

[0044] 8 is a pressing mechanism; 80 is a supporting frame; 81 is a pressing cylinder; 810 is a mounting base plate; 82 is a pressing block; 83 is a first outer abutting column; 84 is a second outer abutting column. DETAILED DESCRIPTION

[0045] The following is a specific embodiment of the present application and further describes the technical solution of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0046] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.

[0047] As Figures 1 to 4 shown, the utility model relates to a spot welding fixture for rear door C column outer plate 10 and guide rail 11, include: tooling plate 2, be equipped with a plurality of support 3, form the clamping groove 110 in guide rail 11, support 3 for extending into the clamping groove 110, with guide rail 11 is limited in horizontal posture, positioning piece 4 and adjusting part 5 are set up on tooling plate 2, positioning piece 4 is installed with the magnetic attraction piece 40 in one end of guide rail 11, adjusting part 5 is movably provided with the abutting block 50, the abutting block 50 movably abuts on the end of guide rail 11 away from the magnetic attraction piece 40, to push guide rail 11 relative support 3 along the horizontal direction and be closely attached to the magnetic attraction piece 40, the profiling block 6 and the positioning pin 7 of height difference setting are set up on tooling plate 2 and are located at the side of adjusting part 5, and the outer plate 10 is arranged in a stepped manner, the profiling block 6 can be supported on the bottom wall of the outer plate 10 at the step with guide rail 11 when the positioning pin 7 is movably penetrated through the outer plate 10, the pressing mechanism 8 is set up on tooling plate 2, and the pressing mechanism 8 is used for movably pressing the outer wall at the step of the outer plate 10 and abutting against the side wall of the outer plate 10 to limit the displacement of the outer plate 10 relative to the guide rail 11.

[0048] The present scheme is mainly to realize the welding positioning between the rear door C column outer plate 10 and the guide rail 11, specifically, Figures 1 to 4As shown, for the placement of the guide rail 11, the embodiment inserts the support piece 3 into the clamping groove 110 inside the guide rail 11, ensuring that the guide rail 11 is stably limited in a horizontal posture, which provides a stable foundation for subsequent accurate positioning and welding. As the magnetic suction block 40 on the positioning piece 4 adsorbs one end of the guide rail 11, a fixed reference point is provided. At this time, the abutting block 50 can push the other end of the guide rail 11, so that the guide rail 11 can move in the horizontal direction until it completely fits the magnetic suction block 40. The position of the guide rail 11 can be fine-tuned by the abutting block 50 to ensure that it is accurately positioned at the position to be welded. After the above operation steps are completed, the outer plate 10 can be positioned and installed. Specifically, during the placement of the outer plate 10, the positioning pin 7 penetrates the outer plate 10 to ensure that it can be limited in the specified position. At the same time, the profiling block 6 can be supported on the bottom wall of the outer plate 10 step according to the stepped shape of the outer plate 10 when the positioning pin 7 penetrates the outer plate 10, which ensures that the outer plate 10 can be accurately connected with the guide rail 11 even if there is a height difference. Finally, as the pressing mechanism 8 tightly abuts and presses against the outer wall of the outer plate 10, it further prevents the outer plate 10 from moving relative to the guide rail 11, greatly ensuring that the welding precision of the two meets the user's usage requirements. After the positioning of both parts is completed, the spot welding machine (not shown in the figure) above the tool plate 2 can start the spot welding work to firmly connect the outer plate 10 and the guide rail 11 together. As can be seen, the positioning and installation of the guide rail 11 provides accurate position guidance for the subsequent positioning and installation of the outer plate 10, ensuring that the relative position between the two is more accurate, thereby improving the welding quality and reliability. Not only that, but the gauge tooling also reduces manual intervention, speeds up production rhythm, reduces labor costs, and at the same time ensures the consistency of each batch of products, effectively avoids the number of defective products caused by position deviation, and improves material utilization.

[0049] The adjusting piece 5 further comprises: a fixed support 51 arranged on the tool plate 2, and the profiling block 6 is installed on the fixed support 51; an installation block 52 connected at one end to the fixed support 51 and having an installation groove 520 opened at the other end, and the abutting block 50 is movably clamped in the installation groove 520; and an elastic piece 53, wherein an extension block 500 is formed on the end of the abutting block 50 in the vertical direction, the elastic piece 53 is movably sleeved on the abutting block 50, and one end of the elastic piece 53 abuts against the side wall of the installation block 52 and the other end abuts against the extension block 500.

[0050] As Figures 1 to 3As shown, when the support 3 is inserted into the clamping groove 110 of the guide rail 11, the guide rail 11 at this time is in a horizontal posture, when the abutting block 50 contacts the guide rail 11, it will automatically adapt to the length of the guide rail 11 under the action of the elastic member 53, and push the guide rail 11 to the side of the magnetic block 40 through slight pressure, to ensure that the guide rail 11 is tightly attached to the magnetic block 40. Therefore, the design of the elastic member 53 can allow the abutting block 50 to flexibly adjust the pressure as needed to adapt to guide rails 11 of different sizes and shapes for positioning and installation, avoiding excessive stress on the guide rail 11, while ensuring sufficient clamping force. During adjustment, the abutting block 50 can always move back and forth along the side opening direction of the mounting groove 520, thereby guiding and limiting the abutting block 50 when adjusting. It should be noted that the elastic member 53 in the embodiment can be replaced by other elastic devices such as compression springs and return springs.

[0051] The bottom wall of the mounting groove 520 is provided with a locking hole 521, and the abutting block 50 is formed with a waist-shaped hole 501, and a locking member 502 is movably arranged in the waist-shaped hole 501, and the locking member 502 is connected in the locking hole 521 to limit displacement of the abutting block 50.

[0052] As shown in Figure 3 As shown, when the abutting block 50 reaches the ideal clamping position (i.e. the abutting block 50 abuts the guide rail 11 against the magnetic block 40), the operator can push the locking member 502 from the waist-shaped hole 501 into the locking hole 521 in the bottom wall of the mounting groove 520. The design of the locking member 502 allows it to move within a certain range in the waist-shaped hole 501, so that the locking member 502 and the locking hole 521 ensure that the abutting block 50 does not displace after reaching the ideal position under the cooperation of the locking effect, thereby greatly improving the precision and stability of welding.

[0053] The support 3 comprises: a base 30 arranged on the tool plate 2; a support block 31 and a limiting block 32, both mounted on the base 30, the end of the support block 31 is formed with a guide portion 310, the guide portion 310 is used to extend into the clamping groove 110; the limiting block 32 and the guide portion 310 together form an anti-displacement cavity 330, one side wall of the guide rail 11 can be movably clamped in the anti-displacement cavity 330.

[0054] Further, with reference to Figure 3As shown, during the positioning and installation of the guide rail 11, the guide part 310 first extends into the engagement groove 110 inside the guide rail 11, playing a preliminary limiting and guiding role. The guide part 310 helps the guide rail 11 quickly find the correct insertion path, reducing the time and difficulty required for alignment. As the guide rail 11 is correctly inserted along the guide part 310, one side wall of it will naturally fall into the anti-detachment cavity 330 formed by the support block 31 and the limiting block 32. The anti-detachment cavity 330 effectively restricts the lateral movement of the guide rail 11, so that the guide rail 11 can only move along its length direction and press against the magnetic block 40, preventing it from accidentally sliding out or shifting, and ensuring that the quality of the welded product is not affected.

[0055] The positioning component 4 also includes: a mounting bracket 41, which is disposed on the tooling plate 2; a mounting plate 42, one end of which is connected to the mounting bracket 41 and the other end is used to mount the magnetic block 40; and a positioning baffle 43, which is disposed on the side of the mounting bracket 41 away from the mounting plate 42, with an L-shaped reference block 430 formed at the end of the positioning baffle 43, and the end of the outer plate 10 is movably pressed against the L-shaped reference block 430.

[0056] like Figure 2 As shown, in this embodiment, the mounting plate 42 can be securely installed on the mounting bracket 41 using bolts, screws, or other fastening methods. This provides a stable support platform for the installation of the magnetic block 40, and also allows the sidewall of the mounting plate 42 to provide sufficient restraint on the end of the guide rail 11 during the magnetic block 40's adsorption of the guide rail 11. Similarly, the positioning baffle 43 is mainly for positioning the outer plate 10. When the outer plate 10 (with a stepped structure) is placed in the predetermined position, its end moves against the L-shaped reference block 430. The design of the L-shaped reference block 430 ensures that the outer plate 10 can be aligned in the correct direction, reducing the need for manual adjustment. Therefore, the combined effect of the fixing force provided by the magnetic block 40 and the constraint of the L-shaped reference block 430 ensures the stability of the outer plate 10 and the guide rail 11 throughout the welding process, avoiding positional displacement caused by external vibrations or other factors. It should be noted that the L-shaped reference block 430 in this embodiment can not only limit the end of the outer plate 10, but also use the L-shaped design to avoid positional interference between the extended end of the outer plate 10 and the positioning baffle 43, thereby improving the safety and reliability of the tooling during positioning and installation.

[0057] Preferably, in this embodiment, each mounting bracket 41 is fitted with an adjusting shim 440 between itself and the mounting plate 42 or the positioning baffle 43, such as... Figure 2As shown, when it is necessary to make a fine adjustment to the position of the magnetic block 40 or the L-shaped reference block 430 on the tooling plate 2, this can be achieved by replacing the adjusting shims 440 of different thicknesses. It should be noted that each adjusting shim 440 has a U-shaped groove (not shown in the figure). The replaced adjusting shim 440 can be fixed in the required position by screws, bolts or other fasteners passing through the U-shaped groove, which effectively improves the accuracy and stability of the magnetic block 40 and the L-shaped reference block 430 as positioning and installation references.

[0058] A guide block 20 and a drive component 21 are inclinedly arranged on the tooling plate 2. A guide sleeve 200 is installed inside the guide block 20. A positioning pin 7 is connected to the drive end of the drive component 21 and is used to drive the positioning pin 7 to move and insert the guide sleeve 200 and pass through the through hole on the side wall of the outer plate 10.

[0059] like Figure 4 As shown, after the outer plate 10 is placed in the predetermined position (at this time, the contour block 6 is already supported on the bottom wall of the outer plate 10 at the step), the driving component 21 can drive the positioning pin 7 to move along the path of the guide sleeve 200, so that the positioning pin 7 can smoothly pass through the through hole on the side wall of the outer plate 10. Due to the inclined setting of the guide block 20, the positioning pin 7 can automatically adjust its angle during the insertion process to ensure that it can perfectly pass through the through hole without causing any damage. After the positioning pin 7 is inserted, the clamping mechanism 8 can operate in the predetermined sequence to complete the precise alignment and fixation between the outer plate 10 and the guide rail 11. Therefore, the presence of the positioning pin 7 provides a reliable reference point for subsequent welding operations, ensuring that the relative position between the outer plate 10 and the guide rail 11 remains stable. It should be noted that the driving component 21 in this embodiment can be replaced by other driving devices such as hydraulic drive or cylinder drive.

[0060] The clamping mechanism 8 includes: a support frame 80, which is mounted on the tooling plate 2; a clamping cylinder 81 and a clamping block 82. The clamping cylinder 81 is mounted on the support frame 80 in a horizontal direction. The output end of the clamping cylinder 81 is connected to the mounting base plate 810. One end of the clamping block 82 is connected to the side wall of the mounting base plate 810, and the other end is used to press against the outer wall at the step of the outer plate 10.

[0061] like Figure 4 As shown, after the positioning pin 7 positions the outer plate 10, the output end of the clamping cylinder 81 pushes the mounting base plate 810 forward, causing the clamping block 82 to approach and press against the outer wall of the outer plate 10 at the step in the horizontal direction. The design of the clamping block 82 ensures that the outer plate 10 remains stable throughout the welding process, avoiding positional displacement caused by external vibration or other factors, thereby improving the accuracy of the welding interface and ensuring the consistency and reliability of the welding quality.

[0062] The pressing mechanism 8 further comprises a first outer pressing column 83 and a second outer pressing column 84 arranged with a height difference, both of which are arranged on the mounting base plate 810, and the first inner pressing column 510 and the second inner pressing column 511 are mounted on the fixed support 51, the first inner pressing column 510 is arranged on the same straight line with the first outer pressing column 83 and is pressed against the inner and outer walls at the bottom end of the outer plate 10, and the second inner pressing column 511 is arranged on the same straight line with the second outer pressing column 84 and is pressed against the inner and outer walls at the top end of the outer plate 10.

[0063] Further, as shown in the drawings, Figure 4 In addition to the pressing effect of the pressing block 82 on the outer plate 10, the first outer pressing column 83 and the second outer pressing column 84 arranged with a height difference are distributed on the mounting base plate 810, and under the action of the same mounting base plate 810, the mounting reference of the two outer pressing columns and the pressing block 82 is ensured to be consistent, thereby providing a guarantee for the accuracy of subsequent accurate positioning of the outer plate 10. Through the cooperative action of the first outer / inner pressing column and the second outer / inner pressing column, it is ensured that the clamping force received by the outer plate 10 is consistent, avoiding the phenomenon of deformation or even damage and scrapping of parts caused by excessive local clamping force. Therefore, the design of the structure ensures that the outer plate 10 remains absolutely stationary during the entire welding process, avoids any possible positional deviation, and guarantees the consistency and reliability of the welding quality.

[0064] It should be noted that the description of "first", "second", "one" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or the number of the technical features indicated. Therefore, the features defined as "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited. The terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0066] The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or changes in the specific embodiments described herein can occur to those skilled in the art to which the application pertains without departing from the spirit of the application, and it is understood that such modifications or changes are to be considered as within the scope of the application as defined by the appended claims.

Claims

1. A spot welding jig tooling for a rear gate C-pillar outer panel and rail, characterized by, The utility model provides a kind of tooling plate, positioning piece and adjusting piece are arranged on the tooling plate, the positioning piece is mounted on the magnetic block located in one end of the guide rail;Adjusting piece is movably provided with abutting block, the abutting block is movably abutted on the end of the guide rail away from the magnetic block, to push the guide rail relative to the support along the horizontal direction and be closely attached to the magnetic block; The profiled block and the positioning pin arranged with a height difference are arranged on the tooling plate and located on one side of the adjusting piece, the outer plate is arranged in a stepped manner, and the profiled block can be supported on the bottom wall of the outer plate at the step together with the guide rail when the positioning pin is movably penetrated through the outer plate. The pressing mechanism is arranged on the tooling plate, and the pressing mechanism is used to movably press the outer wall at the step of the outer plate and abut against the side wall of the outer plate to limit the displacement of the outer plate relative to the guide rail. The adjusting piece further comprises: The fixed support is arranged on the tooling plate, and the profiled block is mounted on the fixed support; 2. The spot welding jig tooling for rear door C pillar outer panel and rail according to claim 1, wherein, The mounting block is connected at one end to the fixed support and has a mounting slot at the other end, and the abutting block is movably clamped in the mounting slot; The end of the abutting block is formed with an extension block in the vertical direction, the elastic member is movably sleeved on the abutting block, one end of the elastic member is abutted against the side wall of the mounting block, and the other end of the elastic member is abutted against the extension block. The support comprises: The base is arranged on the tooling plate; 3. The spot welding jig tooling for rear door C pillar outer panel and rail according to claim 1, wherein, The support block and the limiting block are both mounted on the base, the end of the support block is formed with a guide portion, the guide portion is used to extend into the clamping slot, and the limiting block and the guide portion jointly form an anti-disengagement cavity, and one side wall of the guide rail can be movably clamped in the anti-disengagement cavity. The bottom wall of the mounting slot is provided with a locking hole, the abutting block is formed with a waist-shaped hole, a locking member is movably arranged in the waist-shaped hole, and the locking member is used to be connected in the locking hole to limit the displacement of the abutting block. The positioning piece further comprises:

4. The spot welding jig tooling for rear door C pillar outer panel and rail according to claim 2, wherein, The mounting bracket is arranged on the tooling plate; 5. The spot welding jig tooling for rear door C pillar outer panel and rail according to claim 1, wherein, The mounting plate is connected at one end to the mounting bracket and is used to mount the magnetic block at the other end; The positioning baffle is arranged on the side of the mounting bracket away from the mounting plate, the end of the positioning baffle is formed with an L-shaped reference block, and the end of the outer plate is movably abutted against the L-shaped reference block. Adjusting spacers are assembled between the mounting bracket and the mounting plate or the positioning baffle. The tooling plate is obliquely provided with a guide block and a driving member, the guide block is mounted with a guide sleeve, and the positioning pin is connected to the driving end of the driving member to drive the positioning pin to movably insert the guide sleeve and penetrate through the through hole in the side wall of the outer plate.

6. The spot welding jig tooling for rear door C pillar outer panel and rail according to claim 5, wherein, The pressing mechanism comprises:

7. The spot welding jig tooling for rear door C pillar outer panel and rail according to claim 1, wherein, The support bracket is arranged on the tooling plate; 8. The spot welding jig tooling for rear door C pillar outer panel and rail according to claim 2, wherein, ​ ​ The compacting mechanism comprises a compacting cylinder and a compacting block, the compacting cylinder is installed on the support frame in horizontal direction, the output end of the compacting cylinder is connected with a mounting base plate, one end of the compacting block is connected with the side wall of the mounting base plate, and the other end is used for compacting the outer wall at the step of the outer plate.

9. The spot welding jig tooling for a rear gate C pillar outer panel and rail according to claim 8, wherein, The compacting mechanism further comprises a first outer abutting column and a second outer abutting column arranged with height difference, the first outer abutting column and the second outer abutting column are arranged on the mounting base plate, the first inner abutting column and the second inner abutting column are installed on the fixed support, the first inner abutting column is in the same straight line with the first outer abutting column and abuts against the inner and outer walls at the bottom end of the outer plate respectively, and the second inner abutting column is in the same straight line with the second outer abutting column and abuts against the inner and outer walls at the top end of the outer plate respectively.

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