Energy Absorbing Box Welding Fixture

Abstract

This application discloses a welding fixture for energy-absorbing boxes, belonging to the field of anti-collision beam manufacturing. It includes a frame with a left-side workstation assembly and a right-side workstation assembly arranged on opposite sides. The structures of the left-side and right-side workstation assemblies are symmetrical. The left-side workstation assembly includes a first clamping station and a second clamping station located on different sides of the frame. The first clamping station is equipped with a first plate fixing seat for clamping a first mounting plate and a side plate fixing seat for clamping the energy-absorbing box, with the first plate fixing seat and the side plate fixing seat facing each other. The second clamping station is equipped with a first plate fixing seat for clamping semi-finished parts and a second plate fixing seat for clamping a second mounting plate. This application achieves high-efficiency and stable welding quality through symmetrical workstation assemblies and relatively independent clamping stations.

Description

Technical Field

[0001] This application relates to the field of crash beam manufacturing, and in particular to an energy-absorbing box welding fixture. Background Technology

[0002] With the rapid development of the automotive industry, vehicle safety performance has received increasing attention. The front and rear bumper beams, as important safety components, play a crucial role in collisions. Among them, the energy-absorbing box, a vital component of the bumper beam, has its performance directly affected by the welding quality between it and the mounting plate.

[0003] In traditional energy-absorbing box welding processes, manual operation with fixtures for positioning is typically used. However, manual positioning has many problems, such as the inability to guarantee the accuracy of the welded product, and the potential for misalignment between the energy-absorbing box and the mounting plate due to the lack of clamping devices during welding, which affects the welding quality and may even prevent the welded component from properly collapsing and absorbing energy upon impact, thus reducing vehicle safety.

[0004] To address the aforementioned issues, some energy-absorbing box welding fixtures have emerged in the prior art. For example, Chinese patent application "A Welding Fixture for an Energy-Absorbing Box" (application number: CN201720981274.2) discloses a fixture comprising two parallel floating plates, a front base plate, and a rear base plate. Two parallel guide posts are provided between the front and rear base plates, perpendicular to the front base plate. The floating plates are fitted onto the two guide posts and can move back and forth along them. A first clamping mechanism is provided on the floating plates, a second clamping mechanism is provided on the front base plate, and a first cylinder connected to the first clamping mechanism is provided on the rear base plate. The first cylinder can drive the floating plates to slide forward, bringing the first clamping mechanism closer to the second clamping mechanism.

[0005] However, with the development of the automotive industry, energy-absorbing boxes, as automotive components, are also constantly being updated and iterated. The original energy-absorbing box welding fixtures cannot fully match the new energy-absorbing box structures. Therefore, new improvements have been made to the structure of the energy-absorbing box welding fixtures to meet the high requirements of the automotive manufacturing industry for the welding quality of energy-absorbing boxes and improve the safety performance of automobiles. Utility Model Content

[0006] The technical problem to be solved by this application is to provide an energy-absorbing box welding fixture, which achieves high-efficiency and stable welding quality through symmetrical workstation components and relatively independent clamping workstations.

[0007] The technical solution adopted in this application is: an energy-absorbing box welding fixture, including a frame, on which a left station component and a right station component are arranged on the left and right sides respectively. The structure of the left station component and the structure of the right station component are symmetrical. The left station component includes a first clamping station and a second clamping station, which are located on different sides of the frame. The first clamping station is provided with a first plate fixing seat for clamping the first mounting plate and a side plate fixing seat for clamping the energy-absorbing box, with the first plate fixing seat and the side plate fixing seat being arranged opposite to each other; the second clamping station is provided with a first plate fixing seat for clamping the semi-finished part and a second plate fixing seat for clamping the second mounting plate.

[0008] Compared with existing technologies, the advantages of this application are as follows: First, the first clamping station has a first plate fixing seat and a side plate fixing seat, and the second clamping station has a first plate fixing seat and a second plate fixing seat. These fixing seats can stably clamp the energy-absorbing box and the mounting plate. Compared with traditional manual clamping positioning, the fixing seats can provide more precise positioning. Because the positions of the fixing seats are pre-designed, the relative positions of the energy-absorbing box and the mounting plate during the welding process can be ensured to be accurate, thereby improving the welding precision.

[0009] Secondly, the left and right workstation components are symmetrical, and the energy-absorbing box is divided into left and right parts, which can be welded simultaneously in this application. The first and second clamping stations are located on different sides of the frame. This layout allows the welding of the left and right parts to be performed simultaneously, and each workstation component operates independently. During the welding process, the operations of the first and second clamping stations do not interfere with each other, reducing positional deviations caused by mutual influence and further ensuring welding accuracy. This application can weld the left and right parts simultaneously. This greatly improves welding efficiency, completing twice the workload in the same amount of time compared to the traditional single-part welding method.

[0010] Finally, the clamping action of the fixing seat effectively prevents the energy-absorbing box and mounting plate from shifting position during welding due to external forces (such as welding thermal stress). The fixing seat in this technical solution can continuously and stably clamp the workpiece, ensuring the stability of the workpiece position during welding, thereby improving the stability of welding quality.

[0011] In some embodiments of this application, the two sides of the frame are connected to a rotary drive device via a rotating shaft or turntable. The rotary drive device drives the frame to rotate, and the welding equipment is located on one side of the frame.

[0012] This application considers reasonable layout and avoids mutual interference by placing the first and second clamping stations on different sides of the frame. Therefore, the frame is designed to be connected to a rotary drive device, which drives the clamping station on the side of the frame that is not rotating to face the welding equipment, facilitating welding. The welding equipment is fixed to one side of the frame, and the welding station is switched by flipping the frame, avoiding additional space occupation and making the layout of the entire welding fixture more compact, suitable for use in limited production spaces.

[0013] In some embodiments of this application, the two first clamping stations on the frame are located in the middle of the frame, and the two second clamping stations on the frame are located on both sides of the frame; or the two second clamping stations on the frame are located in the middle of the frame, and the two first clamping stations on the frame are located on both sides of the frame.

[0014] This layout makes efficient use of the rack space, allowing each workstation to perform efficient welding operations within a limited space, thus avoiding wasted space.

[0015] In some embodiments of this application, the first clamping station is provided with a vertical first stroke guide post and a first power cylinder. A first movable plate connected to the first power cylinder is installed on the first stroke guide post. A first plate fixing seat is installed on the first movable plate. The side plate fixing seat is fixedly installed on the frame. When the first power cylinder is working, it pushes the first movable plate to move along the first stroke guide post closer to or away from the side plate fixing seat.

[0016] The first power cylinder precisely controls the movement of the first moving plate via a stroke guide post, ensuring that the first plate fixing seat can accurately approach or move away from the side plate fixing seat, thereby achieving precise welding position control and improving welding accuracy. The design of the stroke guide post makes the movement of the moving plate smoother, avoiding welding position deviations caused by unstable movement and improving the stability of the welding operation.

[0017] In some embodiments of this application, the side plate fixing seat includes a left clamping assembly and a right clamping assembly. The left side plate of the energy-absorbing box is inserted into the left clamping assembly and clamped by the left clamping assembly, and the right side plate of the energy-absorbing box is inserted into the right clamping block assembly and clamped by the right clamping assembly.

[0018] The left and right clamping components respectively secure the left and right side plates of the energy-absorbing box, providing a stable clamping force to ensure that the energy-absorbing box does not shift during welding, thus improving welding quality. The design of the left and right clamping components can be adjusted according to the specific dimensions of the energy-absorbing box to accommodate different models, improving the versatility and flexibility of the fixture.

[0019] In some embodiments of this application, the side plate fixing seat includes a clamping cylinder, the output shaft of the clamping cylinder is connected to a trapezoidal guide block, and the two sides of the trapezoidal guide block are respectively in contact with the left clamping component and the right clamping component. When the clamping cylinder works, it drives the trapezoidal guide block to move, and the movement of the trapezoidal guide block causes the left clamping component and the right clamping component to move closer to or further away from each other.

[0020] The clamping cylinder, via a trapezoidal guide block, rapidly moves the left and right clamping components closer or further apart, enabling quick clamping and release of the energy-absorbing box and improving welding efficiency. The trapezoidal guide block design ensures that the left and right clamping components apply clamping force evenly during movement, preventing deformation of the energy-absorbing box or welding quality issues caused by uneven clamping force.

[0021] In some embodiments of this application, the first plate fixing seat includes a first mounting seat that matches the first mounting plate and at least two rotary clamping cylinders. The two rotary clamping cylinders are located at two corners of the first mounting seat. The output shaft of the rotary clamping cylinder is connected to a pressure rod. The operation of the rotary clamping cylinder drives the pressure rod to press the first mounting plate onto the first mounting seat.

[0022] The rotary clamping cylinder firmly presses the first mounting plate onto the first mounting base via a pressure rod, ensuring the mounting plate does not loosen during welding and improving welding quality. The rotary clamping cylinder can be adjusted according to the shape and size of the mounting plate to adapt to different shapes, improving the versatility and flexibility of the fixture. At the first clamping station, the left and right side plates are welded to form an energy-absorbing box, and the first mounting plate is welded to the left and right side plates to form a semi-finished part.

[0023] In some embodiments of this application, the second clamping station is provided with a vertical second stroke guide post and a second power cylinder. A second movable plate connected to the second power cylinder is installed on the second stroke guide post. A first plate fixing seat is installed on the second movable plate. The second plate fixing seat is fixedly installed on the frame. When the second power cylinder is working, it pushes the second movable plate to move along the second stroke guide post closer to or away from the second plate fixing seat.

[0024] The second power cylinder precisely controls the movement of the second moving plate via the second stroke guide post, ensuring that the first plate fixing seat can accurately approach or move away from the second plate fixing seat, achieving precise welding position control and improving welding accuracy. The design of the second stroke guide post makes the movement of the moving plate more stable, avoiding welding position deviations caused by unstable movement and improving the stability of the welding operation.

[0025] In some embodiments of this application, the first plate fixing seat located on the second movable plate has the same structure as the first plate fixing seat located on the first movable plate. That is, the semi-finished part is also fixed by pressing the first mounting plate.

[0026] In some embodiments of this application, the second plate fixing seat includes a second mounting seat that matches the second mounting plate and at least two rotary clamping cylinders. The two rotary clamping cylinders are located at two corners of the second mounting seat. The output shaft of the rotary clamping cylinder is connected to a pressure rod. When the rotary clamping cylinder works, it drives the pressure rod to press the second mounting plate onto the second mounting seat.

[0027] The rotary clamping cylinder firmly presses the second mounting plate onto the second plate mounting base via a pressure rod, ensuring that the mounting plate will not loosen during welding and improving welding quality. The rotary clamping cylinder can be adjusted according to the shape and size of the mounting plate to adapt to different shapes of mounting plates, improving the versatility and flexibility of the fixture. At the second clamping station, the semi-finished part is welded to the second mounting plate to obtain the desired finished part.

[0028] The entire welding process is quite complex and difficult to achieve on a single welding fixture. Therefore, the entire welding process is divided into two steps and achieved through two sets of clamping stations.

[0029] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0030] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0031] Figure 1 This is a schematic diagram of the structure of this application. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this application. Figure 2 ; Figure 3 This is a side view of this application; Figure 4 for Figure 3 Sectional view of section AA; Figure 5 for Figure 3 A sectional view of the second clamping station in section BB.

[0032] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Frame; 2. Left workstation assembly; 3. Right workstation assembly; 4. First clamping station; 5. Second clamping station; 6. First plate fixing seat; 7. Side plate fixing seat; 8. Second plate fixing seat; 10. First stroke guide post; 11. First power cylinder; 12. First moving plate; 13. Left clamping assembly; 14. Right clamping assembly; 15. Clamping cylinder; 16. Trapezoidal guide block; 17. Rotary clamping cylinder; 18. Pressure rod; 19. Second stroke guide post; 20. Second power cylinder; 21. Second moving plate. Detailed Implementation

[0033] The present application will now be described in detail with reference to the accompanying drawings.

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] Energy-absorbing box welding fixture, as in Example 1 Figure 1 , Figure 2 As shown: A frame 1 is included, on which a left-side workstation assembly 2 and a right-side workstation assembly 3 are arranged, one on the left and one on the right. The structures of the left-side workstation assembly 2 and the right-side workstation assembly 3 are symmetrical. The left-side workstation assembly 2 includes a first clamping station 4 and a second clamping station 5, located on different sides of the frame 1. The energy-absorbing box is divided into left and right parts, which can be welded simultaneously in this application. The first clamping station 4 and the second clamping station 5 are located on different sides of the frame 1. This layout allows the welding of the left and right parts to be performed simultaneously, and each workstation assembly operates independently. During the welding process, the operations of the first clamping station 4 and the second clamping station 5 do not interfere with each other, reducing positional deviations caused by mutual influence and further ensuring welding accuracy. This application can weld the left and right parts simultaneously. This greatly improves welding efficiency, completing twice the workload in the same amount of time compared to the traditional single-part welding method.

[0036] The first clamping station 4 is equipped with a first plate fixing seat 6 for clamping the first mounting plate and a side plate fixing seat 7 for clamping the energy-absorbing box, with the first plate fixing seat 6 and the side plate fixing seat 7 arranged opposite to each other. The second clamping station 5 is equipped with a first plate fixing seat 6 for clamping the semi-finished part and a second plate fixing seat 8 for clamping the second mounting plate. These fixing seats can stably clamp the semi-finished part and the mounting plate. Compared with traditional manual clamp positioning, the fixing seats can provide more precise positioning. Because the position of the fixing seats is pre-designed, it can ensure the accurate relative position of the semi-finished part and the mounting plate during the welding process, thereby improving the welding accuracy.

[0037] The clamping action of the fixing seat effectively prevents the energy-absorbing box and mounting plate from shifting position during welding due to external forces (such as welding thermal stress). The fixing seat in this technical solution can continuously and stably clamp the workpiece, ensuring the stability of the workpiece position during welding, thereby improving the stability of welding quality.

[0038] Implement column two, such as Figures 1 to 5 As shown, the two sides of the frame 1 are connected to a rotary drive device via a rotating shaft or turntable. The rotary drive device drives the frame 1 to rotate, with the welding equipment located on one side of the frame 1. This application considers reasonable arrangement and avoids mutual interference by placing the first clamping station 4 and the second clamping station 5 on different sides of the frame 1. Therefore, the frame 1 is designed to be connected to the rotary drive device, causing the clamping station on the side of the frame 1 that is not rotating to face the welding equipment, facilitating welding. The welding equipment is fixed to one side of the frame 1, and the welding station is switched by rotating the frame 1, avoiding additional space occupation and making the layout of the entire welding fixture more compact, suitable for use in limited production spaces.

[0039] The two first clamping stations 4 on the frame 1 are located in the middle of the frame 1, and the two second clamping stations 5 on the frame 1 are located on both sides of the frame 1; or the two second clamping stations 5 on the frame 1 are located in the middle of the frame 1, and the two first clamping stations 4 on the frame 1 are located on both sides of the frame 1. This layout makes reasonable use of the space of the frame 1, and each station can perform efficient welding operations within a limited space, avoiding space waste.

[0040] The first clamping station 4 is equipped with a vertical first stroke guide post 10 and a first power cylinder 11. A first moving plate 12 connected to the first power cylinder 11 is mounted on the first stroke guide post 10. A first plate fixing seat 6 is mounted on the first moving plate 12. The side plate fixing seat 7 is fixedly mounted on the frame 1. When the first power cylinder 11 operates, it pushes the first moving plate 12 to move along the first stroke guide post 10, approaching or moving away from the side plate fixing seat 7. The first power cylinder 11 precisely controls the movement of the first moving plate 12 through the stroke guide post, ensuring that the first plate fixing seat 6 can accurately approach or move away from the side plate fixing seat 7, thereby achieving precise welding position control and improving welding accuracy. The design of the stroke guide post makes the movement of the moving plate more stable, avoiding welding position deviations caused by unstable movement and improving the stability of the welding operation.

[0041] The side plate fixing seat 7 includes a left clamping assembly 13 and a right clamping assembly 14. The left side plate of the energy-absorbing box is inserted into and clamped by the left clamping assembly 13, and the right side plate of the energy-absorbing box is inserted into and clamped by the right clamping assembly 14. The left and right clamping assemblies 14 clamp the left and right side plates of the energy-absorbing box respectively, providing a stable clamping force to ensure that the energy-absorbing box does not shift during welding, thus improving welding quality. The design of the left and right clamping assemblies 14 can be adjusted according to the specific size of the energy-absorbing box to adapt to different models of energy-absorbing boxes, improving the versatility and flexibility of the fixture.

[0042] The side plate fixing seat 7 includes a clamping cylinder 15. The output shaft of the clamping cylinder 15 is connected to a trapezoidal guide block 16. The two sides of the trapezoidal guide block 16 are respectively in contact with the left clamping assembly 13 and the right clamping assembly 14. When the clamping cylinder 15 operates, it drives the trapezoidal guide block 16 to move. The movement of the trapezoidal guide block 16 causes the left clamping assembly 13 and the right clamping assembly 14 to move closer or further apart. The clamping cylinder 15 quickly drives the left and right clamping assemblies 14 to move closer or further apart through the trapezoidal guide block 16, realizing the rapid clamping and release of the energy-absorbing box and improving the efficiency of the welding operation. The design of the trapezoidal guide block 16 ensures that the left and right clamping assemblies 14 apply clamping force evenly during movement, avoiding deformation of the energy-absorbing box or welding quality problems caused by uneven clamping force.

[0043] The first plate fixing seat 6 includes a first mounting seat that matches the first mounting plate and at least two rotary clamping cylinders 17. The two rotary clamping cylinders 17 are located at two corners of the first mounting seat. The output shaft of the rotary clamping cylinder 17 is connected to a pressure rod 18. The operation of the rotary clamping cylinder 17 drives the pressure rod 18 to press the first mounting plate onto the first mounting seat. The rotary clamping cylinder 17 firmly presses the first mounting plate onto the first mounting seat through the pressure rod 18, ensuring that the mounting plate will not loosen during the welding process and improving the welding quality. The rotary clamping cylinder 17 can be adjusted according to the shape and size of the mounting plate to adapt to mounting plates of different shapes, improving the versatility and flexibility of the fixture. At the first clamping station 4, the left side plate and the right side plate are welded to form an energy-absorbing box, and the first mounting plate is welded to the left side plate and the right side plate to form a semi-finished part.

[0044] The second clamping station 5 is equipped with a vertical second stroke guide post 19 and a second power cylinder 20. A second moving plate 21 connected to the second power cylinder is mounted on the second stroke guide post 19. A first plate fixing seat 6 is mounted on the second moving plate 21, and the second plate fixing seat 6 is fixedly mounted on the frame 1. When the second power cylinder 20 operates, it pushes the second moving plate 21 along the second stroke guide post 19 to move closer to or away from the second plate fixing seat 8. The second power cylinder 20 precisely controls the movement of the second moving plate 21 through the second stroke guide post 19, ensuring that the first plate fixing seat 6 can accurately move closer to or away from the second plate fixing seat 8, achieving precise welding position control and improving welding accuracy. The design of the second stroke guide post 19 makes the movement of the moving plate more stable, avoiding welding position deviations caused by unstable movement and improving the stability of the welding operation.

[0045] The first plate fixing seat 6 located on the second movable plate 21 has the same structure as the first plate fixing seat 6 located on the first movable plate 12. That is, the semi-finished parts are also fixed by pressing the first mounting plate.

[0046] The second plate fixing seat 8 includes a second mounting seat that matches the second mounting plate and at least two rotary clamping cylinders 17. The two rotary clamping cylinders 17 are located at two corners of the second mounting seat. The output shaft of the rotary clamping cylinder 17 is connected to a pressure rod 18. When the rotary clamping cylinder 17 operates, it drives the pressure rod 18 to press the second mounting plate firmly onto the second mounting seat. The rotary clamping cylinder 17, through the pressure rod 18, firmly presses the second mounting plate onto the second mounting seat, ensuring that the mounting plate will not loosen during welding and improving welding quality. The rotary clamping cylinder 17 can be adjusted according to the shape and size of the mounting plate to adapt to mounting plates of different shapes, improving the versatility and flexibility of the fixture. At the second clamping station 5, the semi-finished part is welded to the second mounting plate to obtain the desired finished part.

[0047] The entire welding process is quite complex and difficult to achieve on a single welding fixture. Therefore, the entire welding process is divided into two steps and achieved through two sets of clamping stations.

[0048] The rest of the contents of Example 2 are the same as those of Example 1.

[0049] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An energy-absorbing box welding fixture, characterized in that, Includes a frame (1), on which a left station assembly (2) and a right station assembly (3) are arranged on the left and right sides respectively. The structure of the left station assembly (2) is symmetrical to that of the right station assembly (3). The left station assembly (2) includes a first clamping station (4) and a second clamping station (5). The first clamping station (4) and the second clamping station (5) are located on different sides of the frame (1). The first clamping station (4) is provided with a first plate fixing seat (6) for clamping the first mounting plate and a side plate fixing seat (7) for clamping the energy absorption box. The first plate fixing seat (6) and the side plate fixing seat (7) are arranged opposite to each other. The second clamping station (5) is provided with a first plate fixing seat (6) for clamping the semi-finished parts and a second plate fixing seat (8) for clamping the second mounting plate.

2. The energy-absorbing box welding fixture according to claim 1, characterized in that, The two sides of the frame (1) are connected to a rotary drive device via a rotating shaft or turntable. The rotary drive device drives the frame (1) to rotate, and the welding equipment is located on one side of the frame (1).

3. The energy-absorbing box welding fixture according to claim 1, characterized in that, The two first clamping stations (4) on the frame (1) are located in the middle of the frame (1), and the two second clamping stations (5) on the frame (1) are located on both sides of the frame (1); or the two second clamping stations (5) on the frame (1) are located in the middle of the frame (1), and the two first clamping stations (4) on the frame (1) are located on both sides of the frame (1).

4. The energy-absorbing box welding fixture according to claim 1, characterized in that, The first clamping station (4) is provided with a vertical first stroke guide post (10) and a first power cylinder (11). The first stroke guide post (10) is equipped with a first moving plate (12) connected to the first power cylinder (11). The first moving plate (12) is equipped with a first plate fixing seat (6). The side plate fixing seat (7) is fixedly installed on the frame (1). When the first power cylinder (11) works, it pushes the first moving plate (12) to move along the first stroke guide post (10) to approach or move away from the side plate fixing seat (7).

5. The energy-absorbing box welding fixture according to claim 1 or 4, characterized in that, The side plate fixing seat (7) includes a left clamping assembly (13) and a right clamping assembly (14). The left side plate of the energy absorption box is inserted into the left clamping assembly (13) and clamped by the left clamping assembly (13). The right side plate of the energy absorption box is inserted into the right clamping block assembly and clamped by the right clamping assembly (14).

6. The energy-absorbing box welding fixture according to claim 5, characterized in that, The side plate fixing seat (7) includes a clamping cylinder (15). The output shaft of the clamping cylinder (15) is connected to a trapezoidal guide block (16). The two sides of the trapezoidal guide block (16) are respectively in contact with the left clamping component (13) and the right clamping component (14). When the clamping cylinder (15) works, it drives the trapezoidal guide block (16) to move. The movement of the trapezoidal guide block (16) drives the left clamping component (13) and the right clamping component (14) to move closer to or further away from each other.

7. The energy-absorbing box welding fixture according to claim 1 or 4, characterized in that, The first plate fixing seat (6) includes a first mounting seat that matches the first mounting plate and at least two rotary pressing cylinders (17). The two rotary pressing cylinders (17) are located at two corners of the first mounting seat. The output shaft of the rotary pressing cylinder (17) is connected to the pressure rod (18). The rotary pressing cylinder (17) drives the pressure rod (18) to press the first mounting plate onto the first mounting seat.

8. The energy-absorbing box welding fixture according to claim 1, characterized in that, The second clamping station (5) is provided with a vertical second stroke guide post (19) and a second power cylinder (20). The second stroke guide post (19) is equipped with a second moving plate (21) connected to the second power cylinder. The second moving plate (21) is equipped with a first plate body fixing seat (6). The second plate body fixing seat (8) is fixedly installed on the frame (1). When the second power cylinder (20) works, it pushes the second moving plate (21) to move along the second stroke guide post (19) to approach or move away from the second plate body fixing seat (8).

9. The energy-absorbing box welding fixture according to claim 1, characterized in that, The first plate fixing seat (6) located on the second moving plate (21) has the same structure as the first plate fixing seat (6) located on the first moving plate (12).

10. The energy-absorbing box welding fixture according to claim 1, characterized in that, The second plate fixing seat (8) includes a second mounting seat that matches the second mounting plate and at least two rotary clamping cylinders (17). The two rotary clamping cylinders (17) are located at two corners of the second mounting seat. The output shaft of the rotary clamping cylinder (17) is connected to the pressure rod (18). The rotary clamping cylinder (17) drives the pressure rod (18) to press the second mounting plate onto the second mounting seat.

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