Self-adaptive positioning and riveting tool for lightweight stamping part based on power battery pack

Abstract

The invention relates to the technical field of stamping part riveting, in particular to a self-adaptive positioning riveting tool based on a light-weight stamping part of a power battery pack, which comprises a riveting table and a mechanical arm mounted on the riveting table, a mounting frame is mounted on the mechanical arm, and a grabbing mechanism for self-adaptive profiling fitting of the stamping part is arranged on the mounting frame. The grabbing mechanism comprises a base fixedly connected to the mounting frame, and a plurality of movable pipes are arranged at the bottom of the base. A multi-point profiling structure is formed according to the surface form of a stamping part, self-adaptive adsorption grabbing is achieved, the grabbing stability is guaranteed while the defects of traditional rigid grabbing are overcome, and the riveting efficiency is improved. And meanwhile, a distributed supporting network can be constructed on the surface of the stamping part to balance local stress, so that the overall deformation resistance of the stamping part is further stabilized during riveting, and the riveting quality is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of stamping part riveting, and particularly relates to a self-adaptive positioning riveting tool for a light-weight stamping part of a power battery pack. BACKGROUND

[0002] The light-weight stamping part of a power battery pack is a precise metal component formed by stamping process with light-weight material as a base material, is widely applied to key positions such as a battery pack shell, a frame, a supporting structure and a protection assembly, and has a core value of minimizing the overall weight of the battery pack while realizing the dual balance of assembly precision and production efficiency on the basis of meeting structural strength and protection performance.

[0003] Traditional light-weight stamping part riveting tools generally adopt two-side or multi-side clamping to realize side clamping and fixing, so as to realize accurate positioning and riveting, but when the stamping part has irregular surface features, the following problems exist. Small-area virtual clamping leads to insufficient positioning stability, cannot guarantee the position precision in the riveting process, or over-pressing clamping causes plastic deformation of the thin-walled part, directly affects the performance of the part, although the problem can be solved by using a profiled clamping block, the profiled clamping block is used separately for the part, cannot realize the generalization of different stamping parts, and further causes the inconvenience in use.

[0004] In view of the above technical defects, the present application provides a solution, that is, a self-adaptive profiled structure is formed around the riveting point according to the surface morphology of the stamping part, the positioning and fixing effect is improved, the problems of virtual clamping and over-pressing of traditional clamping are solved, a distributed support network is constructed by means of adsorption and grabbing to balance the local stress, the overall anti-deformation capability of the stamping part is effectively strengthened, the riveting quality is simultaneously improved from the aspects of positioning stability and structure protection, and the generalization demand and the precise assembly requirement are considered. SUMMARY

[0005] The application aims to provide a self-adaptive positioning riveting tool for a light-weight stamping part of a power battery pack to solve the above technical defects.

[0006] The application can be realized by the following technical scheme: a self-adaptive positioning riveting tool for a light-weight stamping part of a power battery pack, comprising a riveting table and a mechanical arm installed on the riveting table, a mounting rack is installed on the mechanical arm, a grabbing mechanism that is self-adaptive to the profiled stamping part is arranged on the mounting rack, and a riveting mechanism for self-feeding of a rivet is arranged, the grabbing mechanism comprises a seat body fixedly connected to the mounting rack, a plurality of movable pipes are arranged at the bottom of the seat body, a suction pipe with a sealed end at the top is movably installed in the movable pipe, and a suction disc is connected to the bottom of the suction pipe.

[0007] Preferably, the inside of the seat body is provided with a cavity, and a mounting cavity below the cavity is provided with a piston cavity communicated with the cavity.

[0008] Preferably, the inside of the mounting cavity is slidably connected with a locking plate, and the locking plate is provided with a through slot for the corresponding movable tube to pass through, and an antiskid pad is mounted on the inner wall of one side of the through slot, and the locking plate is fixedly connected with a piston plate in sealing sliding connection with the piston cavity.

[0009] Preferably, the movable tube is rotatably connected with a sealing sleeve in sealing sliding connection with the movable tube, and the sealing sleeve is dampedly rotatable with the movable tube, the inner wall of the sealing sleeve is provided with a gas groove penetrating through the top of the sealing sleeve, and the movable tube is provided with a notch matched with the gas groove.

[0010] Preferably, the top of the sealing sleeve is fixedly connected with a second spring between the cavity, and guide pins are symmetrically fixedly connected on the outer walls of the two sides of the sealing sleeve, and the inner wall of the movable tube is provided with an inclined slot in sliding connection with the guide pins.

[0011] Preferably, the top of the seat body is fixedly provided with an air cylinder communicated with the cavity, the inside of the air cylinder is sealingly slidably connected with a piston block, and the mounting frame is provided with an electric push rod driving the piston block to slide.

[0012] Preferably, the middle of the seat body is provided with a riveting hole, the top of the riveting hole is provided with a guide pin sleeve, the bottom of the guide pin sleeve is fixedly connected with a plurality of elastic sheets abutting against the inner wall of the riveting hole, and the elastic sheets are in L-shaped structure.

[0013] Preferably, the riveting mechanism comprises a hydraulic cylinder fixedly installed on the mounting frame, the piston rod end of the hydraulic cylinder is provided with a riveting rod through a connecting plate, and the mounting frame is slidably connected with a nail feeding rail for feeding the rivets.

[0014] Preferably, the top of the nail feeding rail is fixedly connected with a linkage frame, the linkage frame is provided with a Z-shaped groove, the connecting plate is fixedly connected with a guide rod in sliding connection with the Z-shaped groove, the top of the seat body is fixedly connected with a limiting plate in sliding connection with the rail groove of the nail feeding rail, and the top of the nail feeding rail is provided with a nail feeding pipe on one side.

[0015] The beneficial effects of the present application are as follows: (1) This invention uses multiple adsorption tubes and corresponding movable tubes to autonomously construct a multi-point conformal structure that combines passive conformal and active fitting according to the shape of each area on the surface of the lightweight internal support stamping part. This enables adaptive adsorption and gripping of the surface around different rivet points, avoiding the problem of small-area false clamping or overpressure deformation caused by irregular surface in traditional rigid gripping. During the adsorption process, the locking plate can move synchronously to lock the displacement of the movable tube after conformal adsorption, which helps to stabilize the position after gripping. It can also provide multi-point equal force support around different rivet points, construct a distributed support network, achieve adaptive balance of local stress, avoid the problem of uneven stress distribution and deformation caused by concentrated force on the rivet points during the riveting process, and help improve the riveting quality. (2) During the descent of the rivet rod of the present invention, the feed rail moves in conjunction with the limiting plate, and moves within the feed rail to realize the automatic feeding of rivets into the rivet hole. Then, multiple L-shaped elastic plates are used to realize the self-centering of the rivets, thereby achieving precise riveting. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the installation of multiple active tubes of the present invention; Figure 3 This is a cross-sectional schematic diagram of the gripping mechanism of the present invention; Figure 4 This is a schematic diagram of the riveting mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the base of the present invention; Figure 6 This is a schematic diagram of the locking plate of the present invention; Figure 7 This is a schematic diagram of the cooperation between the nail feeding rail and the nail guide sleeve of the present invention; Figure 8 This is a schematic diagram showing the combination of the active tube and the adsorption tube of the present invention; Figure 9 This is a schematic diagram of the structure of the active tube of the present invention; Figure 10 This is a schematic diagram of the sealing sleeve of the present invention; Figure 11 This is a schematic diagram of the fit between the sealing sleeve and the adsorption tube of the present invention.

[0017] Legend: 1. Riveting table; 11. Robotic arm; 12. Mounting frame; 2, seat body; 21, movable pipe; 22, adsorption pipe; 23, cavity; 24, mounting cavity; 25, piston cavity; 26, first spring; 27, locking plate; 28, piston plate; 29, sealing sleeve; 210, air groove; 211, notch; 212, second spring; 213, guide pin; 214, inclined slot; 215, air cylinder; 216, piston block; 217, electric push rod; 3, guide pin sleeve; 31, elastic sheet; 4, hydraulic cylinder; 41, connecting plate; 42, riveting rod; 43, nail feeding rail; 44, linkage frame; 45, Z-shaped groove; 46, guide rod; 47, limiting plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Embodiment one: please refer to Figure 1 With Figure 8 As shown in the figure, for the traditional clamping riveting, it is impossible to avoid the problem of virtual clamping and overpressure at the same time, and the general processing of different stamping parts, which can be solved by the following scheme; The power battery pack lightweight stamping part self-adaptive positioning riveting tool in the embodiment includes a riveting table 1 for placing the lightweight shell stamping part, and a mechanical arm 11 installed on the riveting table 1, the mechanical arm 11 is installed with a mounting bracket 12, and the mounting bracket 12 is provided with a grabbing mechanism for self-adaptive profiling of the stamping part, and a rivet feeding mechanism for rivet feeding, and the mechanical arm 11 is used to realize the multi-degree-of-freedom movement of the mounting bracket 12, realizing the grabbing, conveying and positioning installation of the lightweight inner support stamping part; The grabbing mechanism includes a seat body 2 fixedly connected to the mounting bracket 12, and the bottom of the seat body 2 is provided with a plurality of movable pipes 21, and the inside of the movable pipe 21 is movably installed with an adsorption pipe 22 with a sealed end at the top. Through the setting of multiple adsorption pipes 22 and corresponding movable pipes 21, a multi-point profiling structure combining passive conforming and active fitting can be autonomously constructed according to the shape of each region of the lightweight inner support stamping part, to realize the adaptive adsorption grabbing of the surface around different riveting points, and avoid the problem of small area virtual clamping or overpressure deformation caused by irregular surface in traditional rigid grabbing. The bottom of the adsorption pipe 22 is connected with a suction cup for realizing the sealing between the adsorption pipe 22 and the lightweight inner support stamping part.

[0020] The seat body 2 is internally provided with a cavity 23, and an installation cavity 24 located below the cavity 23, one side of the installation cavity 24 is provided with a piston cavity 25 communicated with the cavity 23, the movable tube 21 is slidably connected with the seat body 2, by extracting the air in the cavity 23, the gas in the adsorption tube 22 in the movable tube 21 is synchronously extracted, and the synchronous adsorption and fixing treatment of each contact point of the lightweight inner support stamping part is realized; And the adsorption force is equal, so as to build a distributed support network to balance the local stress, effectively strengthen the overall anti-deformation ability of the stamping part, and simultaneously improve the riveting quality from the aspects of positioning stability and structure protection, so as to meet the generalization demand and precise assembly requirement, and the top of the movable tube 21 is fixedly connected with the cavity 23, and the first spring 26 is arranged for independent movement of the movable tube 21, so that the end of the adsorption tube 22 can have a distance difference between each other, and the multi-point profiling adsorption and fixing effect is realized.

[0021] The installation cavity 24 is slidably connected with a locking plate 27, the locking plate 27 is provided with a through slot for the corresponding movable tube 21 to penetrate, and a non-slip pad is mounted on one side of the inner wall of the through slot for increasing the contact friction between the locking plate 27 and the movable tube 21, and the locking plate 27 is fixedly connected with a piston plate 28 in sealing and sliding connection with the piston cavity 25; When the gas in the cavity 23 is extracted, the lightweight inner support stamping part is negatively adsorbed and gripped by the adsorption tube 22, and the gas in the piston cavity 25 is synchronously extracted in combination with the communication between the cavity 23 and the piston cavity 25, so as to drive the piston plate 28 to move the locking plate 27, so that the non-slip pad on the inner wall of the through slot abuts against the outer wall of the corresponding movable tube 21 to move and lock the movable tube 21, and the stability of the gripped part is assisted, and then the lightweight inner support stamping part is positioned and installed on the lightweight shell stamping part by the mechanical arm 11.

[0022] The top of the seat body 2 is fixedly provided with a gas cylinder 215 communicated with the cavity 23, the gas cylinder 215 is internally in sealing and sliding connection with a piston block 216, and the mounting frame 12 is provided with an electric push rod 217 for driving the piston block 216 to slide, the electric push rod 217 drives the piston block 216 to move upward, so as to extract the gas in the cavity 23 into the gas cylinder 215, and realize the negative pressure adsorption and gripping and the position locking of the movable tube 21.

[0023] The middle of the seat body 2 is provided with a riveting hole, the mechanical arm 11 drives the seat body 2 to move above the lightweight inner support stamping part through the mounting frame 12, and the riveting point of the lightweight inner support stamping part is coaxial with the center of the riveting hole, then the seat body 2 is pushed to move vertically downward, so as to support the surrounding of different riveting points with equal force, build a distributed support network, and further realize the self-adaptive balance of the internal stress of the stamping part around different riveting points; The top of the riveting hole is provided with a guide sleeve 3, and the bottom of the guide sleeve 3 is fixedly connected with a plurality of elastic sheets 31 abutting against the inner wall of the riveting hole. The elastic sheet 31 has an L-shaped structure. The rivet is moved out of the feeding rail 43, falls into the riveting hole through the guide sleeve 3, and is assisted and centered by the plurality of elastic sheets 31, so as to realize precise riveting. Then, the rivet is pushed downward by the riveting rod 42, the elastic sheet 31 is deformed and separated, and the rivet is used to rivet the light-weighted inner support stamping part and the light-weighted shell stamping part.

[0024] The riveting mechanism comprises a hydraulic cylinder 4 fixedly installed on the mounting frame 12. The end of the piston rod of the hydraulic cylinder 4 is provided with a riveting rod 42 through a connecting plate 41. The mounting frame 12 is slidably connected with a feeding rail 43 for feeding the rivet.

[0025] The top of the feeding rail 43 is fixedly connected with a linkage frame 44, and the linkage frame 44 is provided with a Z-shaped groove 45. The connecting plate 41 is fixedly connected with a guide rod 46 slidably connected with the Z-shaped groove 45. The top of the seat body 2 is fixedly connected with a limiting plate 47 slidably connected with the rail groove of the feeding rail 43. During the process that the hydraulic cylinder 4 pushes the riveting rod 42 downward, the guide rod 46 on the connecting plate 41 slides in the Z-shaped groove 45, so as to make the linkage frame 44 carry the feeding rail 43 to move horizontally away from the riveting rod 42. During the movement of the feeding rail 43, the rivet is limited by the limiting plate 47 inside the feeding rail 43, so as to limit the rivet from moving along. When one end of the feeding rail 43 moves away from above the guide sleeve 3, one rivet inside the feeding rail 43 moves out of the feeding rail 43, falls into the riveting hole through the guide sleeve 3, and the top of the feeding rail 43 is provided with a feeding pipe. The riveting rod 42 is lifted and reset. The feeding rail 43 is moved to above the guide sleeve 3 again by the guide rod 46 and the Z-shaped groove 45, and the rivet inside the feeding rail 43 is synchronously driven. Then, the feeding pipe is used to supplement the rivet missing in the feeding rail 43.

[0026] Embodiment two: please refer to Figures 8-11 As shown in the figure, for the problem that part of the adsorption tube cannot contact the stamping part, so that adsorption grabbing cannot be performed, and small-size stamping parts cannot be used, the following scheme can be used to solve the problem. The adsorption tube 22 in the embodiment is rotatably connected with a sealing sleeve 29 in sealing and sliding connection with the movable tube 21. The annular outer wall of the sealing sleeve 29 is provided with a sealing ring close to the two side end faces. The seat body 2 is provided with a sealing ring in sliding connection with the movable tube 21. The sealing sleeve 29 and the adsorption tube 22 are in damping rotation. The inner wall of the sealing sleeve 29 is provided with a gas groove 210 penetrating the top thereof. The adsorption tube 22 is provided with a slot 211 matched with the gas groove 210. The outer wall of the adsorption tube 22 is provided with a sealing gasket outside the periphery of the slot 211. By relative rotation between the sealing sleeve 29 and the adsorption pipe 22, the air groove 210 on the inner wall of the sealing sleeve 29 is communicated with the slot 211 on the adsorption pipe 22, and then the adsorption pipe 22 is communicated with the movable pipe 21 and the cavity 23 through the slot 211 and the air groove 210, so that the corresponding adsorption area can be controlled, thereby realizing the grabbing of the small-size stamped part.

[0027] The second spring 212 is fixedly connected between the top of the sealing sleeve 29 and the cavity 23, and the guide pin 213 is symmetrically fixedly connected on the outer wall of the sealing sleeve 29. The seat body 2 is lowered, the suction disc on the adsorption pipe 22 is in contact with the lightweight inner support stamped part, the adsorption pipe 22 carrying the sealing sleeve 29 is relatively raised in the movable pipe 21 and compresses the second spring 212, the adsorption pipe 22 is in contact with the lightweight inner support stamped part to limit the rotation of the adsorption pipe 22, and the guide pin 213 is guided by the inclined groove 214 to make the sealing sleeve 29 deflect synchronously, so that the air groove 210 on the inner wall of the sealing sleeve 29 is automatically communicated with the slot 211 on the adsorption pipe 22. In combination with the limitation of the guide pin 213 by the inclined groove 214, the movable pipe 21 is pushed to compress the first spring 26, so that the bottoms of the plurality of adsorption pipes 22 form a multi-point profiling structure matched with the surface of the lightweight inner support stamped part, and the cross-section of the movable pipe 21 is in a shape other than a complete circle, so as to avoid the rotation of the movable pipe 21.

[0028] Embodiment three: please refer to Figures 1-11 As shown in the drawings, the application also provides a use method of the power battery pack lightweight stamped part self-adaptive positioning riveting tool, which comprises the following steps: Step one: place the lightweight shell stamped part on the riveting table 1, drive the seat body 2 to move above the lightweight inner support stamped part through the mounting frame 12 of the mechanical arm 11, and make the riveting point of the lightweight inner support stamped part coaxial with the hole center of the riveting hole, then vertically move the seat body 2 downward, so that the bottoms of the plurality of adsorption pipes 22 in the corresponding grabbing area are in contact with the lightweight inner support stamped part. Step two: after the suction disc on the adsorption pipe 22 is in contact with the lightweight inner support stamped part, during the continuous lowering of the seat body 2, the adsorption pipe 22 carrying the sealing sleeve 29 is relatively raised in the movable pipe 21 and compresses the second spring 212, the adsorption pipe 22 is in contact with the lightweight inner support stamped part to limit the rotation of the adsorption pipe 22, the guide pin 213 is guided by the inclined groove 214 to make the sealing sleeve 29 deflect synchronously, so that the air groove 210 on the inner wall of the sealing sleeve 29 is communicated with the slot 211 on the adsorption pipe 22, and then the adsorption pipe 22 is communicated with the movable pipe 21 and the cavity 23 through the slot 211 and the air groove 210. After the rear of the seat body 2 is continuously lowered again, the guide pin 213 is limited by the inclined groove 214, and the movable pipe 21 is further pushed to compress the first spring 26, causing the bottom of the plurality of suction pipes 22 to form a multi-point profiling structure that is adapted to the surface of the lightweight inner support stamping part, and the second spring 212 is compressed again to increase the contact force between the suction cup and the lightweight inner support stamping part. Among them, the suction pipe 22 that does not resist the lightweight inner support stamping part is connected by the damping between the suction pipe 22 and the sealing sleeve 29, and the suction pipe 22 and the sealing sleeve 29 do not rotate relative to each other, and then the part of the suction pipe 22 is not communicated with the cavity 23; Step three: after the completion of the profiling adaptive fitting, the electric push rod 217 drives the piston block 216 to rise, the gas in the cavity 23 is extracted to the inside of the air cylinder 215, and then the lightweight inner support stamping part is negatively adsorbed and grabbed, and the gas in the piston cavity 25 is synchronously extracted through the communication between the cavity 23 and the piston cavity 25, prompting the piston plate 28 to pull the locking plate 27 to move, causing the anti-skid pad on the inner wall of the through groove to resist the corresponding movable pipe 21 outer wall, and the movable pipe 21 is moved and locked. After that, the mechanical arm 11 positions and installs the adsorbed and grabbed lightweight inner support stamping part on the lightweight shell stamping part; Step four: the hydraulic cylinder 4 pushes the riveting rod 42 to move downward, and through the sliding of the guide rod 46 on the connecting plate 41 in the Z-shaped groove 45, the linkage frame 44 carries the nail feeding rail 43 to move away from the riveting rod 42 horizontally, and in the process of moving, the limiting plate 47 inside the nail feeding rail 43 limits the rivet to limit the rivet to follow the movement, so that when one end of the nail feeding rail 43 moves away from the above of the guide sleeve 3, one rivet inside the nail feeding rail 43 moves out and falls into the riveting hole through the guide sleeve 3, and the plurality of elastic sheets 31 in the riveting hole assist the rivet to be centered, and then the riveting rod 42 is pressed into the riveting hole, pushing the rivet downward to cause the elastic sheet 31 to deform and separate, and the rivet is used to rivet the lightweight inner support stamping part and the lightweight shell stamping part; During the riveting process, the plurality of movable pipes 21 are limited, and the suction pipes 22 adsorb and grab the lightweight inner support stamping part everywhere with equal force, so as to avoid the problem that the overall lightweight inner support stamping part is prone to deformation due to concentrated stress at the riveting point. After riveting is completed, the riveting rod 42 rises and resets, the elastic sheet 31 deforms and resets, and with the rising of the riveting rod 42, the guide rod 46 and the Z-shaped groove 45 drive the one end of the nail feeding rail 43 to move to the above of the guide sleeve 3 again, and drive the internal rivet to follow, and the nail feeding pipe is used to supplement the rivet missing in the nail feeding rail 43.

[0029] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An adaptive positioning riveting fixture for lightweight stamped parts of power battery packs, comprising a riveting table (1) and a robotic arm (11) mounted on the riveting table (1), characterized in that, The robotic arm (11) is equipped with a mounting frame (12), and the mounting frame (12) is provided with a gripping mechanism for adaptive conformal fitting of the stamping parts and a riveting mechanism for self-feeding rivets. The gripping mechanism includes a base (2) fixedly connected to the mounting frame (12). The bottom of the base (2) is provided with several movable tubes (21), and an adsorption tube (22) with a sealed top is movably installed inside the movable tube (21). The bottom of the adsorption tube (22) is connected to a suction cup.

2. The adaptive positioning and riveting fixture for lightweight stamped parts based on power battery packs according to claim 1, characterized in that, The seat (2) has a cavity (23) inside and an installation cavity (24) located below the cavity (23). A piston cavity (25) communicating with the cavity (23) is provided on one side of the installation cavity (24). The movable tube (21) is slidably connected to the seat (2), and a first spring (26) is fixedly connected between the top of the movable tube (21) and the cavity (23).

3. The adaptive positioning and riveting fixture for lightweight stamped parts based on power battery packs according to claim 2, characterized in that, The mounting cavity (24) is slidably connected to a locking plate (27), and the locking plate (27) is provided with a through groove for the corresponding movable tube (21) to pass through. An anti-slip pad is installed on one side of the inner wall of the through groove. A piston plate (28) is fixedly connected to the locking plate (27) and is slidably connected to the piston cavity (25).

4. The adaptive positioning and riveting fixture for lightweight stamped parts based on power battery packs according to claim 2, characterized in that, The adsorption tube (22) is rotatably connected to a sealing sleeve (29) that is slidably connected to the movable tube (21), and the sealing sleeve (29) and the adsorption tube (22) are damped to rotate. The inner wall of the sealing sleeve (29) is provided with an air groove (210) that penetrates its top, and the adsorption tube (22) is provided with a slot (211) that cooperates with the air groove (210).

5. The adaptive positioning and riveting fixture for lightweight stamped parts based on power battery packs according to claim 4, characterized in that, A second spring (212) is fixedly connected between the top of the sealing sleeve (29) and the cavity (23). Guide pins (213) are symmetrically fixed on the outer walls of both sides of the sealing sleeve (29). An oblique groove (214) that slides with the guide pin (213) is opened on the inner wall of the movable tube (21).

6. The adaptive positioning and riveting fixture for lightweight stamped parts based on power battery packs according to claim 2, characterized in that, An air cylinder (215) communicating with the cavity (23) is fixedly installed on one side of the top of the seat (2). A piston block (216) is slidably connected inside the air cylinder (215). An electric push rod (217) for driving the piston block (216) to slide is installed on the mounting bracket (12).

7. The adaptive positioning and riveting fixture for lightweight stamped parts based on power battery packs according to claim 1, characterized in that, The seat (2) has a rivet hole in the middle. A guide pin sleeve (3) is installed on the top of the rivet hole. A plurality of elastic pieces (31) that abut against the inner wall of the rivet hole are fixedly connected to the bottom of the guide pin sleeve (3). The elastic pieces (31) have an L-shaped structure.

8. The adaptive positioning and riveting fixture for lightweight stamped parts based on power battery packs according to claim 1, characterized in that, The riveting mechanism includes a hydraulic cylinder (4) fixedly mounted on a mounting frame (12). The piston rod end of the hydraulic cylinder (4) is fitted with a riveting rod (42) via a connecting plate (41). A rivet feeding rail (43) for feeding rivets is slidably connected to the mounting frame (12).

9. The adaptive positioning and riveting fixture for lightweight stamped parts based on power battery packs according to claim 8, characterized in that, The top of the feeding rail (43) is fixedly connected to a linkage frame (44), and a Z-shaped groove (45) is provided on the linkage frame (44). A guide rod (46) that is slidably connected to the Z-shaped groove (45) is fixedly connected to the connecting plate (41). A limiting plate (47) that is slidably connected to the groove of the feeding rail (43) is fixedly connected to the top of the seat (2). A feeding tube is installed on one side of the top of the feeding rail (43).

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