A projection welding machine for welding a shock absorber

Abstract

The application discloses a projection welding machine for shock absorber welding, and particularly relates to the technical field of shock absorber welding, which comprises a device main body, telescopic assemblies and supporting assemblies are respectively arranged on the upper and lower sides of the device main body, an upper electrode column is arranged at the bottom of the telescopic assembly, a lower electrode column is arranged at the middle of the supporting assembly, a working platform is arranged on the supporting platform, a movable plate is slidably connected to the working platform, a clamping mechanism is arranged on one side of the movable plate, a clamping mechanism is arranged on the other side of the movable plate, two supporting wheels are rotatably connected to the movable plate and located between the clamping mechanism and the clamping mechanism, a driving part is arranged on the device main body and electrically connected to the internal control system, and is used for driving the movable plate to move and the clamping mechanism and the clamping mechanism to operate. The application can adapt to shock absorbers with different pipe diameters, continuously complete multi-welding point welding, improve welding efficiency and automation level, and avoid repeated positioning errors.

Description

Technical Field

[0001] This invention relates to the field of shock absorber welding technology, and more specifically, to a projection welding machine for shock absorber welding. Background Technology

[0002] As a key component of the automotive suspension system, the manufacturing quality of shock absorbers directly affects the vehicle's driving safety, comfort, and handling stability. During the production of shock absorbers, the welding process is one of the core aspects determining their structural strength and service life. In particular, the projection welding connections between components such as the shock absorber's oil reservoir, connecting sleeve, and bracket and the main body place high demands on the precision of the welding position, the stability of the electrode pressure, and the welding efficiency.

[0003] Currently, most traditional shock absorber projection welding equipment uses a fixed electrode structure and manual clamping method. Operators must first place the shock absorber workpiece to be welded on the welding station, fix it using manual or semi-automatic clamps, and then use a cylinder to drive the upper electrode downwards to complete one projection weld. After one weld point is completed, the operator must manually release the clamps, remove the shock absorber, readjust its position, and re-clamp it before proceeding to the next weld point.

[0004] Because shock absorbers typically require multiple weld points distributed circumferentially, the auxiliary time for this "one-time clamping, one-time welding, repeated disassembly" operation mode is far greater than the actual welding time, severely restricting the production cycle of mass production. For highly automated production lines, this process with frequent manual intervention becomes a bottleneck for the entire production line's efficiency. Moreover, each time the workpiece is re-clamped, the axial position and circumferential angle of the workpiece rely on the operator's feel and experience for positioning. The positional accuracy between different weld points fluctuates greatly, easily leading to insufficient connection strength or excessive welding deformation of the shock absorber due to welding position deviations, thus affecting the product qualification rate.

[0005] To address these issues, the present invention proposes a projection welding machine for welding shock absorbers. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a projection welding machine for welding shock absorbers, which can stably clamp and flexibly adjust the shock absorbers, thereby improving welding quality and efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a projection welding machine for shock absorber welding, comprising a main body of the equipment, and further comprising: The upper connecting part includes a telescopic component disposed on the upper side of the main body of the device, and the bottom of the telescopic component is provided with an upper electrode post for applying downward pressure to the shock absorber; The lower connection part includes a support assembly disposed on the lower side of the equipment body. The support assembly has a lower electrode post in the middle. The lower electrode post can contact the bottom of the shock absorber to support the shock absorber and provide a lower electrode path for welding current. The fixing part includes a working platform movably disposed above the support assembly. A movable plate is slidably connected to the working platform. One side of the movable plate is provided with a snap-fit ​​mechanism for snapping with the connecting sleeve on the shock absorber and driving the shock absorber to rotate. The other side of the movable plate is provided with a clamping mechanism for fixing the end of the shock absorber away from the connecting sleeve. Two support wheels symmetrically distributed front and rear are rotatably connected to the movable plate for supporting the shock absorber upward. The two support wheels are located between the snap-fit ​​mechanism and the clamping mechanism. The drive unit is electrically connected to the control system within the main body of the device and is used to drive the horizontal movement of the movable plate and the operation of the locking mechanism and the clamping mechanism.

[0008] Furthermore, the telescopic assembly includes a fixed cylinder and a telescopic rod, with the bottom of the telescopic rod fixed to the upper electrode post. The top of the fixed cylinder is provided with a first cylinder, the output end of which is fixed to the top of the telescopic rod. The first cylinder is an adjustable stroke cylinder used to drive the telescopic rod to slide up and down inside the fixed cylinder.

[0009] Furthermore, the support assembly includes two guide rails symmetrically distributed on the lower side of the device body, a base vertically slidably connected between the two guide rails, a support platform at the upper end of the base, the bottom of the lower electrode post being fixed to the support platform, and the support platform being able to drive the lower electrode post to move up and down.

[0010] Furthermore, the support platform is provided with two symmetrically distributed sleeves, each sleeve having a guide rod vertically slidably connected inside. The tops of both guide rods are fixed to the working platform, and each guide rod is fitted with a first elastic element located between the working platform and the sleeve. The first elastic element always has the tendency to drive the support platform to move upward. Each guide rod has a baffle at its bottom to prevent the guide rod from separating from the corresponding sleeve.

[0011] Furthermore, a lead screw is rotatably connected to the bottom of the base, and the bottom of the lead screw is threaded into the main body of the equipment to adjust the height of the lower electrode post.

[0012] Furthermore, the locking mechanism includes a vertical plate fixed perpendicularly to the movable plate, a sleeve is slidably connected to the vertical plate, a frustum is rotatably connected to one end of the sleeve near the support wheel, a locking block is slidably connected to the bottom of the frustum in its radial direction, the bottom of the locking block can cooperate with the connecting sleeve on the shock absorber, and a fixing bolt is provided on the sleeve, the fixing bolt can contact the end face of the vertical plate, thereby limiting the position of the sleeve.

[0013] Furthermore, the bottom of the frustum is provided with a sliding groove distributed radially thereon, the locking block is slidably connected to the sliding groove, and a second elastic element is provided in the sliding groove between its bottom and the locking block, the elastic element always having the tendency to drive the locking block to move toward the center of the frustum.

[0014] Furthermore, the clamping mechanism includes a mounting base fixed to the movable plate. The top of the mounting base is rotatably connected to two first rollers symmetrically distributed front and back. The axes of the first rollers coincide with those of the corresponding support rollers, which, together with the support rollers, provide upward support for the shock absorber. The mounting base is hinged to two clamping rods symmetrically distributed front and back. Each clamping rod has a second roller rotatably connected to its free end. The clamping rods are L-shaped to prevent collision with the shock absorber during swinging. A lifting platform is vertically slidably connected to the bottom of the mounting base. Two connecting rods symmetrically distributed front and back are hinged to the lifting platform. The free end of each connecting rod is hinged to the middle of the corresponding clamping rod. When the lifting platform moves up and down, the connecting rods drive the two clamping rods to swing up and down simultaneously.

[0015] Furthermore, the mounting base is provided with a vertical screw and a cylindrical rod. One side of the lifting platform is vertically slidably connected to the cylindrical rod to increase the stability of the lifting platform when it moves up and down. The other side is threadedly engaged with the screw, and the screw drives the lifting platform to move up and down when it rotates.

[0016] Furthermore, the drive unit includes a second cylinder, a first motor, and a second motor, all of which are electrically connected to and controlled by the control system within the main body of the equipment. The second cylinder is horizontally mounted on the working platform, and its output end is fixed to the movable plate. The first motor is mounted inside the housing, and its output end is fixed to the frustum. The second motor is mounted on the mounting base, and its output end is fixed to the screw.

[0017] The technical effects and advantages of this invention are as follows: 1. This invention uses a clamping mechanism in conjunction with a fixing part to hold the shock absorber. In the clamping mechanism, the truncated cone and the clamping block work together with a first motor to drive the workpiece to rotate around its axis; the second cylinder in the driving part pushes the movable plate to move laterally, achieving fine-tuning of the axial direction. After welding, there is no need to remove the fixing; the workpiece can be rotated or moved to the next welding point, continuously completing multi-welding point welding. The entire process maintains clamping, eliminating repeated disassembly and assembly, reducing auxiliary time, and is suitable for batch production of multiple welding points, improving welding efficiency and automation, and avoiding repetitive positioning errors.

[0018] 2. This invention features a lead screw that allows independent adjustment of the lower electrode post height. Combined with the stroke adjustment of the first cylinder, it adapts to shock absorbers with different welding heights without requiring tooling changes. The clamping mechanism housing can be finely adjusted and locked along the vertical plate. With the floating support of the guide rod and the first elastic element, it accommodates shock absorbers of different pipe diameters. The clamping mechanism drives the lifting platform and connecting rod to open and close the clamping rod via a screw, flexibly adjusting the clamping range. One set of equipment is compatible with multiple specifications, reducing investment and changeover time.

[0019] 3. In this invention, a guide rod and a first elastic element are provided between the working platform and the support platform to form a floating support, buffering the impact of the upper electrode pressing down, preventing workpiece crushing or splashing, stabilizing electrode pressure, and improving weld quality. The support wheel, first and second rollers constitute a rolling clamping system, which can not only fix shock absorbers of different pipe diameters, but also allow the workpiece to rotate smoothly, avoiding scratches and indentations. The axes of the support wheel and the first roller coincide, resulting in uniform force distribution, preventing bending deformation, and ensuring positional accuracy and dimensional stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention after the shock absorber is fixed.

[0022] Figure 3 This is a front view sectional diagram of the overall structure of the present invention.

[0023] Figure 4 This is a left-side view of the overall structure of the present invention.

[0024] Figure 5 This is a left-side sectional view of the overall structure of the present invention.

[0025] Figure 6 This is a left-side schematic diagram of the clamping mechanism in this invention.

[0026] Figure 7 This is a left-side sectional view of the clamping mechanism in this invention.

[0027] Figure 8 This is an exploded view of the components in the clamping mechanism of the present invention.

[0028] Figure 9 This is a schematic diagram of the snap-fit ​​mechanism in this invention.

[0029] Figure 10 This is a front sectional view of the snap-fit ​​mechanism in this invention.

[0030] Figure 11 This is an exploded view of the components in the snap-fit ​​mechanism of the present invention.

[0031] Figure 12 This is a left-side sectional view of the snap-fit ​​mechanism in this invention.

[0032] The attached figures are labeled as follows: 1. Equipment body; 2. Upper connecting part; 201. Telescopic assembly; 2011. Fixed cylinder; 2012. Telescopic rod; 2013. First cylinder; 202. Upper electrode column; 3. Lower connecting part; 301. Support assembly; 3011. Guide rail; 3012. Base; 3013. Support platform; 302. Lower electrode column; 4. Fixing part; 401. Working platform; 402. Movable plate; 403. Snap-fit ​​mechanism; 4031. Vertical plate; 4032. Housing; 4033. Frustum; 4034. Snap-fit 4035, Fixing bolt; 404, Clamping mechanism; 4041, Mounting base; 4042, First roller; 4043, Clamping rod; 4044, Second roller; 4045, Lifting platform; 4046, Connecting rod; 405, Support wheel; 5, Drive unit; 501, Second cylinder; 502, First motor; 503, Second motor; 6, Sleeve; 7, Guide rod; 8, First elastic element; 9, Baffle; 10, Slide groove; 11, Second elastic element; 12, Screw; 13, Cylindrical rod; 14, Lead screw. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figures 1 to 12 As shown, this embodiment provides a projection welding machine for shock absorber welding, including a main body 1. The main body 1 is provided with an upper connecting part 2, a lower connecting part 3, a fixing part 4 and a driving part 5. A control system is installed inside the main body 1, and the driving part 5 is electrically connected to the control system to perform corresponding actions.

[0035] The upper connecting part 2 is used to apply electrode pressure to the welding area of ​​the shock absorber from above. It includes a telescopic assembly 201 mounted on the upper side of the equipment body 1, with an upper electrode post 202 fixed to the bottom of the telescopic assembly 201. In this embodiment, the telescopic assembly 201 includes a fixed cylinder 2011 and a telescopic rod 2012. The fixed cylinder 2011 is vertically mounted on a slide block on the upper part of the equipment body 1. The telescopic rod 2012 slides in conjunction with the fixed cylinder 2011, with its lower end extending out of the fixed cylinder 2011 and fixedly connected to the upper electrode post 202. A first cylinder 2013 is mounted on the top of the fixed cylinder 2011. The piston rod of the first cylinder 2013 is connected to the telescopic rod 2012. The first cylinder 2013 drives the telescopic rod 2012 to slide up and down within the fixed cylinder 2011, thereby causing the upper electrode post 202 to perform downward and upward movements.

[0036] Specifically, the first cylinder 2013 is an adjustable stroke cylinder, used to change the vertical movement of the upper electrode post 202, thereby adapting to different models of shock absorbers. It should be noted that the adjustable stroke cylinder is existing technology, and its specific structure will not be described in detail here.

[0037] The lower connecting part 3 is used to support the shock absorber and provide a lower electrode path for the welding current. It includes a support assembly 301 disposed on the lower side of the equipment body 1. A lower electrode post 302 is provided in the middle of the support assembly 301, and the upper end of the lower electrode post 302 can contact the bottom of the shock absorber. The support assembly 301 specifically includes two guide rails 3011 symmetrically distributed on the lower side of the equipment body 1 and extending in a vertical direction. A base 3012 is slidably connected between the two guide rails 3011. A support platform 3013 is fixed to the upper end of the base 3012, and the bottom of the lower electrode post 302 is fixed to the support platform 3013.

[0038] Specifically, a lead screw 14 is rotatably connected to the bottom of the base 3012. The bottom of the lead screw 14 is threaded with the main body 1 of the equipment. The base 3012 is driven to slide vertically along the guide rail 3011 by rotating the lead screw 14. The initial height of the support platform 3013 and the lower electrode column 302 can be adjusted as a whole to adapt to the welding requirements of different types of shock absorbers.

[0039] The fixing part 4 is used for horizontal support and axial and circumferential positioning of the shock absorber. It includes a working platform 401 movably mounted above the support assembly 301. Specifically, two symmetrically distributed sleeves 6 are fixed on the support platform 3013. Each sleeve 6 has a guide rod 7 vertically slidably connected inside. The tops of the two guide rods 7 are fixed to the working platform 401. Each guide rod 7 is fitted with a first elastic element 8, which is a cylindrical helical spring and has the tendency to drive the working platform 401 to move upward. Its upper and lower ends abut against the lower end face of the working platform 401 and the upper end face of the sleeve 6, respectively. A baffle 9 is also provided at the bottom of the guide rod 7 to prevent the guide rod 7 from coming off upward. Through this structure, the working platform 401 can float up and down relative to the support platform 3013 within a certain range, forming elastic support.

[0040] A movable plate 402 is laterally slidably connected to the upper end of the working platform 401. The front and rear ends of the movable plate 402 are U-shaped, allowing it to be engaged with the edge of the working platform 401. A locking mechanism 403 is provided on one side of the movable plate 402 for engaging with the connecting sleeve at one end of the shock absorber and driving the shock absorber to rotate. A clamping mechanism 404 is provided on the other side of the movable plate 402 for fixing the end of the shock absorber away from the connecting sleeve. Two symmetrically distributed support wheels 405 are rotatably connected to the upper surface of the movable plate 402, located between the locking mechanism 403 and the clamping mechanism 404. The axes of the support wheels 405 are in the left-right direction to support the shock absorber cylinder and allow it to rotate.

[0041] The snap-fit ​​mechanism 403 includes a vertical plate 4031 fixed perpendicularly to the movable plate 402. A housing 4032 is slidably connected to the vertical plate 4031. The housing 4032 can slide slightly up and down along the vertical plate 4031 to accommodate shock absorbers of different diameters. A fixing bolt 4035 is provided on the housing 4032, which can contact the end face of the vertical plate 4031, thereby restricting the position of the housing 4032. A frustum 4033 is rotatably connected to one end of the housing 4032 near the support wheel 405 via a bearing. The axis of the frustum 4033 is horizontally oriented, and the side of the frustum 4033 is tapered, allowing it to be inserted into the end of shock absorbers of different pipe diameters. A locking block 4034 is slidably connected to the bottom of the frustum 4033 along its radial direction. A radially extending groove 10 is formed at the bottom of the frustum 4033. The locking block 4034 is fitted into the groove 10. A second elastic element 11, a compression spring, is provided between the bottom of the groove 10 and the locking block 4034. The second elastic element 11 always has a tendency to drive the locking block 4034 towards the center of the frustum 4033. The lower end of the locking block 4034 can extend into a groove on the shock absorber connecting sleeve to form a locking engagement.

[0042] When a snap-fit ​​is required, the end of the shock absorber with the connecting sleeve is fitted onto the side of the frustum 4033, so that the axis of the frustum 4033 coincides with the axis of the shock absorber. The locking block 4034 is pressed into the mating structure of the connecting sleeve under the action of the second elastic element 11. Then, the fixing bolt 4035 is rotated so that the fixing bolt 4035 fits against the end face of the vertical plate 4031, thereby fixing the housing 4032 and the frustum 4033 in the current position. When the frustum 4033 rotates, the shock absorber can be rotated as a whole through the locking block 4034.

[0043] The clamping mechanism 404 includes a mounting base 4041 fixed on a movable plate 402. Two first rollers 4042, symmetrically distributed front to back, are rotatably connected to the top of the mounting base 4041. The axes of the first rollers 4042 coincide with those of the corresponding support rollers 405, forming a bottom rolling support for the shock absorber. Two clamping rods 4043, symmetrically distributed front to back, are also hinged to the mounting base 4041. The clamping rods 4043 are L-shaped to prevent collision with the shock absorber during swinging. The lower ends of the two clamping rods 4043 are hinged to both sides of the mounting base 4041, and the upper ends are free ends, each rotatably connected to a second roller 4044. A lifting platform 4045 is vertically slidably connected to the bottom of the mounting base 4041. Two connecting rods 4046, symmetrically distributed front to back, are hinged to the lifting platform 4045. The free end of each connecting rod 4046 is hinged to the middle of the corresponding clamping rod 4043. The mounting base 4041 is provided with a vertically arranged screw 12 and a cylindrical rod 13. One side of the lifting platform 4045 is provided with a sliding hole and is vertically slidably connected to the cylindrical rod 13, and the other side is provided with a threaded hole and is threadedly engaged with the screw 12.

[0044] When the screw 12 rotates, it drives the lifting platform 4045 to move up and down, and then drives the two clamping rods 4043 to close or open via the connecting rod 4046. When the clamping rods 4043 close, the second roller 4044 can press the end of the shock absorber from above, and together with the first roller 4042 and the support wheel 405, they form a rolling clamping of the shock absorber, which can prevent radial movement without hindering the shock absorber from rotating around its own axis.

[0045] The drive unit 5 is used to realize the lateral movement of the movable plate 402, the rotation drive of the clamping mechanism 403, and the clamping drive of the clamping mechanism 404. It includes a second cylinder 501, a first motor 502, and a second motor 503. The second cylinder 501 is horizontally fixed on the working platform 401, and the end of its piston rod is fixedly connected to the movable plate 402. By extending and retracting the second cylinder 501, the movable plate 402 and the entire set of clamps on it can be pushed to move laterally, thereby adjusting the axial position of the shock absorber. The first motor 502 is fixedly installed in the housing 4032, and its output shaft is coaxially fixed with the frustum 4033. It is used to drive the frustum 4033 and the clamping block 4034 to rotate, thereby driving the shock absorber to rotate. The second motor 503 is fixedly installed on the mounting base 4041, and its output shaft is coaxially fixed with the screw 12. It is used to drive the screw 12 to rotate, thereby controlling the clamping or releasing action of the clamping mechanism 404.

[0046] The working process of this invention is as follows: First, according to the specifications of the shock absorber to be welded, the first cylinder 2013 and the lead screw 14 are adjusted to adjust the movement range of the upper electrode post 202 and the height of the lower electrode post 302, so that the distance between them is adapted to the requirements of the welding part of the shock absorber. The shock absorber is placed on the support wheel 405 and the first roller 4042, with one end with the connecting sleeve facing the snap-fit ​​mechanism 403 and the other end facing the clamping mechanism 404. The shock absorber is manually moved so that the frustum 4033 is aligned and abuts against its end, and the snap-fit ​​block 4034 snaps into the mating groove of the connecting sleeve. Next, the second motor 503 drives the screw 12 to rotate, the lifting platform 4045 rises and drives the two clamping rods 4043 to close through the connecting rod 4046, and the second roller 4044 presses down on the end of the shock absorber to reliably clamp the shock absorber. At this time, the shock absorber is supported by the first roller 4042, the support wheel 405 and the second roller 4044.

[0047] Before welding, the worker first clamps the workpiece to be welded onto the bottom of the upper electrode post 202. This clamping structure is existing technology and its specific structure will not be described in detail here. The first motor 502 drives the frustum 4033 to rotate, rotating the shock absorber to the required circumferential welding position. The second cylinder 501 pushes the movable plate 402 to move laterally, fine-tuning the axial position of the welding part so that the area to be welded is precisely aligned with the upper and lower electrodes. Subsequently, the control system controls the first cylinder 2013 to drive the telescopic rod 2012 to move downward, pressing the upper electrode post 202 against the projection weld point on the upper end of the shock absorber, while the lower electrode post 302 supports the shock absorber from the bottom, and the projection weld is completed by energizing. During the welding process, the floating support provided by the working platform 401 and the elastic element can adapt to the pressure stroke, ensuring stable electrode pressure and avoiding rigid impact.

[0048] After one projection weld is completed, there is no need to remove the shock absorber from its fixing position. The control system drives the shock absorber to move and rotate via the drive unit 5, moving the next weld point of the shock absorber directly below the upper electrode post 202, and then performing the second projection weld. Multiple projection welds can be performed consecutively, without disassembling and re-fixing the shock absorber after each weld, until all weld points are completed. After welding is finished, each mechanism is reset sequentially, and the finished product can be removed.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A projection welding machine for welding shock absorbers, comprising a main body (1), characterized in that, Also includes: The upper connecting part (2) includes a telescopic component (201) disposed on the upper side of the main body (1), and the bottom of the telescopic component (201) is provided with an upper electrode post (202) for applying downward pressure to the shock absorber; The lower connecting part (3) includes a support assembly (301) disposed on the lower side of the main body (1), and the support assembly (301) is provided with a lower electrode post (302) in the middle, and the lower electrode post (302) can contact the bottom of the shock absorber; The fixing part (4) includes a working platform (401) movably disposed above the support assembly (301). A movable plate (402) is slidably connected to the working platform (401). A snap-fit ​​mechanism (403) is provided on one side of the movable plate (402) for snapping with the connecting sleeve on the shock absorber and driving the shock absorber to rotate. A clamping mechanism (404) is provided on the other side of the movable plate (402) for fixing the end of the shock absorber away from the connecting sleeve. Two support wheels (405) symmetrically distributed front and rear are rotatably connected to the movable plate (402). The two support wheels (405) are located between the snap-fit ​​mechanism (403) and the clamping mechanism (404). The drive unit (5) is electrically connected to the control system in the main body (1) of the device and is used to drive the horizontal movement of the movable plate (402) and the operation of the snap-fit ​​mechanism (403) and the clamping mechanism (404).

2. The projection welding machine for shock absorber welding according to claim 1, characterized in that, The telescopic assembly (201) includes a fixed cylinder (2011) and a telescopic rod (2012). The bottom of the telescopic rod (2012) is fixed to the upper electrode post (202). The top of the fixed cylinder (2011) is provided with a first cylinder (2013). The first cylinder (2013) is an adjustable stroke cylinder used to drive the telescopic rod (2012) to slide up and down inside the fixed cylinder (2011).

3. The projection welding machine for shock absorber welding according to claim 1, characterized in that, The support component (301) includes two guide rails (3011) symmetrically distributed on the lower side of the device body (1). A base (3012) is vertically slidably connected between the two guide rails (3011). A support platform (3013) is provided on the upper end of the base (3012). The bottom of the lower electrode post (302) is fixed to the support platform (3013).

4. The projection welding machine for shock absorber welding according to claim 3, characterized in that, The support platform (3013) is provided with two symmetrically distributed sleeves (6), each sleeve (6) is vertically slidably connected with a guide rod (7), the top of the two guide rods (7) is fixed to the working platform (401), each guide rod (7) is fitted with a first elastic element (8) located between the working platform (401) and the sleeve (6), and each guide rod (7) is provided with a baffle (9) at the bottom.

5. The projection welding machine for shock absorber welding according to claim 3, characterized in that, The bottom of the base (3012) is rotatably connected to a lead screw (14), the bottom of which is threaded into the main body of the equipment (1) for adjusting the height of the lower electrode post (302).

6. The projection welding machine for shock absorber welding according to claim 1, characterized in that, The locking mechanism (403) includes a vertical plate (4031) that is vertically fixed to the movable plate (402). A sleeve (4032) is vertically slidably connected to the vertical plate (4031). A frustum (4033) is rotatably connected to one end of the sleeve (4032) near the support wheel (405). A locking block (4034) is slidably connected to the bottom of the frustum (4033) along its radial direction. The bottom of the locking block (4034) can cooperate with the connecting sleeve on the shock absorber. A fixing bolt (4035) is provided on the sleeve (4032). The fixing bolt (4035) can contact the end face of the vertical plate (4031).

7. The projection welding machine for shock absorber welding according to claim 6, characterized in that, The bottom of the truncated cone (4033) is provided with a sliding groove (10) distributed radially thereon. The locking block (4034) is slidably connected to the sliding groove (10). The sliding groove (10) is provided with a second elastic element (11) located between its bottom and the locking block (4034).

8. The projection welding machine for shock absorber welding according to claim 1, characterized in that, The clamping mechanism (404) includes a mounting base (4041) fixed on a movable plate (402). The top of the mounting base (4041) is rotatably connected to two first rollers (4042) symmetrically distributed front and back. The first rollers (4042) coincide with the axis of the support wheel (405) on the corresponding side. The mounting base (4041) is hinged to two clamping rods (4043) symmetrically distributed front and back. The free end of each clamping rod (4043) is rotatably connected to a second roller (4044). The bottom of the mounting base (4041) is vertically slidably connected to a lifting platform (4045). The lifting platform (4045) is hinged to two connecting rods (4046) symmetrically distributed front and back. The free end of each connecting rod (4046) is hinged to the middle of the corresponding clamping rod (4043).

9. The projection welding machine for shock absorber welding according to claim 8, characterized in that, The mounting base (4041) is provided with a vertical screw (12) and a cylindrical rod (13). One side of the lifting platform (4045) is vertically slidably connected to the cylindrical rod (13), and the other side is threadedly engaged with the screw (12).

10. The projection welding machine for shock absorber welding according to claim 1, characterized in that, The drive unit (5) includes a second cylinder (501), a first motor (502) and a second motor (503). The second cylinder (501) is horizontally mounted on the working platform (401) and its output end is fixed to the movable plate (402). The first motor (502) is mounted inside the housing (4032) and its output end is fixed to the frustum (4033). The second motor (503) is mounted on the mounting base (4041) and its output end is fixed to the screw (12).

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