A high-precision sheet metal part welding processing device

Abstract

The application relates to the technical field of metal welding equipment, in particular to a high-precision sheet metal part welding machining device, which comprises a welding table and a control end, the control end is arranged on the welding table, the top of the welding table is symmetrically provided with a driving assembly, an anti-reverse resetting assembly and a clamping assembly, the driving assembly comprises a moving seat, the moving seat is arranged on the top of the welding table, the two sides of the moving seat are symmetrically rotationally connected with rotating discs, and the top of the moving seat is symmetrically provided with bearing discs; the two sides of the clamping structure have independent feeding capacity through the sliding compensation characteristics of the limiting driving rods inside the bearing discs, the rotating discs and the ratchet wheels; for sheet metal parts with height differences, inclined surfaces and special-shaped curved surfaces, one side can be preferentially attached, the other side can be continuously compensated and fed, the special-shaped clamping block group inside the rotating block can be adaptively attached to the workpiece contour, the problem that traditional clamps cannot adapt to special-shaped sheet metal clamping is solved, and the workpiece is prevented from being offset or rigidly extruded and deformed.

Description

Technical Field

[0001] This invention relates to the field of metal welding equipment, and more specifically to a high-precision sheet metal parts welding processing device. Background Technology

[0002] After sheet metal parts are processed and formed, they need to be assembled by welding. During the welding process, the stability of the workpiece's positioning and clamping directly determines the flatness, alignment accuracy, and forming quality of the sheet metal weld. Therefore, workpiece clamping and positioning fixtures are a core component of sheet metal welding equipment. Currently, conventional sheet metal welding clamping devices have relatively simple structures, mostly adopting fixed rigid clamping structures, which can only clamp and position standard sheet metal workpieces with high flatness, uniform thickness, and regular shape.

[0003] In actual production, some sheet metal parts have irregular structures such as surface height differences, slopes, and irregular curved surfaces. Traditional rigid fixtures have a fixed clamping stroke on both sides, which cannot adaptively adjust the contact position according to the workpiece surface contour, easily leading to situations such as one-sided loose clamping or one-sided overpressure. Loose clamping can cause the workpiece to shift due to welding thermal stress and equipment vibration during welding, resulting in weld misalignment and reduced welding accuracy; overpressure can easily squeeze the sheet metal surface, causing indentations and micro-deformation, affecting the appearance and dimensional accuracy of the workpiece.

[0004] Meanwhile, most existing welding clamping equipment lacks a stable mechanical self-locking structure, relying on manual tightening of bolts or electric tightening to maintain the clamping state. This makes them prone to loosening and slippage during prolonged welding operations, resulting in poor positioning stability. While clamps with electric locking mechanisms offer some locking capability, they depend on the coordination of electrical control components and sensors. In welding workshops with high dust levels, frequent vibrations, and high temperatures, electrical structures are prone to failure, leading to high maintenance costs and limited equipment operational stability.

[0005] Therefore, there is a need to provide a high-precision sheet metal parts welding processing device to solve the above problems. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a high-precision sheet metal parts welding processing device.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-precision sheet metal parts welding processing device, comprising a welding table and a control terminal, wherein the control terminal is disposed on the welding table, and a drive assembly, an anti-reverse reset assembly and a clamping assembly are symmetrically disposed on the top of the welding table; The drive assembly includes a movable base, which is disposed on the top of the welding table. Rotary disks are symmetrically rotatably connected to both sides of the movable base, and bearing disks are symmetrically mounted on the top of the movable base. Limit drive rods are slidably connected inside the two bearing disks. The anti-reverse reset assembly includes a positioning frame, which is fixedly connected to the top of the inner cavity of the movable seat. A ratchet disk is rotatably connected to the end of the positioning frame away from the movable seat, and a coil spring is sleeved on the outer side of the ratchet disk.

[0008] Preferably, the limiting drive rod is slidably connected inside the rotating disk.

[0009] Preferably, the drive assembly includes a threaded drive rod assembly, which is fixedly connected to the outer wall of the limit drive rod.

[0010] Preferably, one end of the coil spring is fixedly connected to the ratchet disk, and the other end of the coil spring is fixedly connected to the positioning frame.

[0011] Preferably, the anti-reverse reset assembly includes a limiting tooth, which is rotatably connected to the top of the positioning frame and abuts against the ratchet disc. First reset springs are symmetrically arranged on both sides of the limiting tooth, one end of each of the two first reset springs is fixedly connected to the limiting tooth, and the other end of each of the two first reset springs is fixedly connected to the positioning frame.

[0012] Preferably, the anti-reverse reset assembly includes a distance extending block, which is fixedly connected to the limiting tooth. A limiting groove is formed on the top of the movable seat, and a limiting slide rod is slidably connected inside the limiting groove. A second reset spring is sleeved on the outside of the limiting slide rod. One end of the second reset spring is fixedly connected to the limiting slide rod, and the other end of the second reset spring away from the limiting slide rod is fixedly connected to the movable seat.

[0013] Preferably, the limiting slide bar is positioned above the distance-extending block, and the distance-extending block is positioned on the movement path of the limiting slide bar.

[0014] Preferably, the limiting drive rod is slidably connected inside the ratchet disc.

[0015] Preferably, the clamping assembly includes a helical gear assembly, which is slidably connected inside the movable seat and meshes with a threaded drive rod assembly.

[0016] Preferably, the clamping assembly includes a group of irregularly shaped clamping blocks, which is fixedly connected to the bottom of the helical toothed rod group. An anti-slip plate is provided below the irregularly shaped clamping block group, and the anti-slip plate is located at the bottom of the movable seat.

[0017] The high-precision sheet metal parts welding processing device provided by this invention has the following advantages compared with the prior art: By utilizing the sliding compensation characteristics of the limit drive rod within the bearing disc, rotating disc, and ratchet disc, the clamping structures on both sides possess independent feeding capabilities. For sheet metal parts with height differences, inclined surfaces, or irregular curved surfaces, it can achieve priority fitting on one side while continuous feeding on the other side. In conjunction with the adaptive fitting of the rotating blocks inside the irregular clamping block group to the workpiece contour, it solves the problem that traditional fixtures cannot adapt to the clamping of irregular sheet metal parts, avoids workpiece misclamping or rigid extrusion deformation, and improves the welding adaptation range and positioning fitting accuracy of irregular sheet metal workpieces.

[0018] By using the unidirectional contact between the limiting teeth and the ratchet disc, and with the energy storage of the coil spring to maintain the locked state, the reverse rotation of the limiting drive rod can be effectively limited. This can counteract the springback stress of the sheet metal workpiece and the equipment vibration and thermal deformation stress during the welding process, continuously maintain a stable clamping preload, prevent the clamping structure from loosening or slipping, ensure stable positioning throughout the welding process, reduce quality defects such as weld misalignment and poor forming, and improve the accuracy of sheet metal welding and the yield of finished products.

[0019] Pressing the limit slide bar releases the ratchet lock, and the spring-loaded spring automatically lifts and resets the clamping structure, allowing for quick workpiece unloading. Compared to the traditional method of manually loosening and unlocking the locking structure one by one, this simplifies the clamping and unlocking process, shortens workpiece changeover and loading / unloading time, and improves the efficiency of continuous sheet metal welding operations.

[0020] The device employs a mechanically integrated structure, eliminating reliance on sensors. It boasts high structural integration, low failure rate, and excellent vibration and high-temperature resistance, making it suitable for the harsh working conditions of welding workshops characterized by dust, high temperatures, and continuous vibration. Maintenance is simple, and operating costs are lower. Furthermore, the equipment can clamp and position sheet metal workpieces of various specifications and irregular shapes, demonstrating strong versatility and meeting the high-precision welding production needs of diverse sheet metal parts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the overall positional relationship of the device in this invention; Figure 2 This is a schematic diagram showing the positional relationship between the movable seat, the rotating disk, and the limiting slide rod in this invention; Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram showing the positional relationship between the rotating disk, the limiting drive rod, and the threaded drive rod assembly in this invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point B in the middle; Figure 6 This is a schematic diagram showing the positional relationship between the ratchet disc, coil spring, and limiting teeth in this invention; Figure 7For the present invention Figure 6 Enlarged view of the structure at point C; Figure 8 This is a schematic diagram showing the positional relationship between the limiting drive rod and the threaded drive rod assembly in this invention; Figure 9 This is a schematic diagram showing the positional relationship between the movable seat, the helical toothed rod assembly, and the irregularly shaped clamping block assembly in this invention; Figure 10 This is a schematic diagram showing the positional relationship between the helical toothed rod assembly and the irregular clamping block assembly in this invention.

[0022] Reference numerals: 11. Welding table; 12. Control terminal; The drive assembly includes: 21. a movable base; 22. a rotating disk; 23. a bearing disk; 24. a limit drive rod; and 25. a threaded drive rod assembly. The anti-reverse reset assembly includes: 31, positioning frame; 32, ratchet disc; 33, coil spring; 34, limiting tooth; 35, first reset spring; 36, distance extending block; 37, limiting slide groove; 38, limiting slide rod; 39, second reset spring; The clamping assembly includes: 41, helical toothed bar assembly; 42, irregularly shaped clamping block assembly; 43, anti-slip plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the invention and are not intended to limit the invention.

[0024] In the description of this invention, the terms “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0026] Implementation, for example Figure 1 As shown, a high-precision sheet metal parts welding processing device provided by an embodiment of the present invention includes a welding table 11 and a control terminal 12. The control terminal 12 is disposed on the welding table 11, and a drive assembly, an anti-reverse reset assembly, and a clamping assembly are symmetrically disposed on the top of the welding table 11.

[0027] like Figure 2 , Figure 3 , Figure 8As shown, the drive assembly includes a movable base 21, a rotating disk 22, a bearing disk 23, a limiting drive rod 24, and a threaded drive rod assembly 25. The movable base 21 is located on the top of the welding table 11. The rotating disk 22 is symmetrically rotatably connected to both sides of the movable base 21. The bearing disks 23 are symmetrically mounted on the top of the movable base 21. The limiting drive rod 24 is slidably connected to the interior of both bearing disks 23. The limiting drive rod 24 is also slidably connected to the interior of the rotating disk 22. The threaded drive rod assembly 25 is fixedly connected to the outer wall of the limiting drive rod 24.

[0028] It should be noted that the movable seat 21 is electrically connected to the control terminal 12. The relative distance between the two movable seats 21 can be adjusted through the control terminal 12 to adapt to the positioning requirements of sheet metal workpieces of different widths. This is existing technology and will not be elaborated on here.

[0029] When the threaded drive rod assembly 25 meshes with the helical gear assembly 41, and the helical gear assembly 41 on one side stops moving downward due to the workpiece limit, the continuously rotating limit drive rod 24 can synchronously slide along the bearing disk 23, the rotating disk 22 and the ratchet disk 32 to achieve adaptive compensation of the transmission position, avoid the mechanism from jamming, and ensure that the clamping structure on the other side can be independently and continuously fed to achieve adaptive fitting and clamping of irregular sheet metal.

[0030] like Figures 4 to 7 As shown, the anti-reverse reset assembly includes a positioning frame 31, a ratchet disc 32, a coil spring 33, a limiting tooth 34, a first reset spring 35, a distance-extending block 36, a limiting slide groove 37, a limiting slide rod 38, and a second reset spring 39. The positioning frame 31 is fixedly connected to the top of the inner cavity of the movable seat 21. The ratchet disc 32 is rotatably connected to one end of the positioning frame 31 away from the movable seat 21. A coil spring 33 is sleeved on the outer side of the ratchet disc 32. One end of the coil spring 33 is fixedly connected to the ratchet disc 32, and the other end is fixedly connected to the positioning frame 31. A limiting drive rod 24 is slidably connected inside the ratchet disc 32.

[0031] A limiting tooth 34 is rotatably connected to the top of the positioning frame 31, and abuts against the ratchet disc 32. First return springs 35 are symmetrically arranged on both sides of the limiting tooth 34. One end of each of the two first return springs 35 is fixedly connected to the limiting tooth 34, and the other end is fixedly connected to the positioning frame 31. A distance-extending block 36 is fixedly connected to the limiting tooth 34. A limiting groove 37 is formed on the top of the moving seat 21. A limiting rod 38 is slidably connected inside the limiting groove 37. A second return spring 39 is sleeved on the outside of the limiting rod 38. One end of the second return spring 39 is fixedly connected to the limiting rod 38, and the end of the second return spring 39 away from the limiting rod 38 is fixedly connected to the moving seat 21. The limiting rod 38 is positioned above the distance-extending block 36, and the distance-extending block 36 is positioned along the movement path of the limiting rod 38.

[0032] It should be noted that during clamping operations, the unidirectional contact between the limiting tooth 34 and the ratchet disc 32 achieves anti-reverse locking, counteracting workpiece springback and welding vibration, and maintaining clamping stability. When unlocking, the limiting slide bar 38 presses down to abut against the distance-extending block 36, mechanically moving the limiting tooth 34 to disengage from the ratchet disc 32. After unlocking, the mechanism automatically returns to its original position by relying on the elastic reset of the coil spring 33. The entire process is purely mechanical, requiring no electrical control or induction, and is suitable for the high-temperature and high-vibration conditions in welding workshops.

[0033] like Figure 9 and Figure 10 As shown, the clamping assembly includes a helical gear assembly 41, a shaped clamping block assembly 42, and an anti-slip plate 43. The helical gear assembly 41 is slidably connected inside the movable base 21 and meshes with a threaded drive rod assembly 25, the width of which is greater than that of the helical gear assembly 41. The bottom of the helical gear assembly 41 is fixedly connected to the shaped clamping block assembly 42, and several sets of rotating blocks are rotatably connected inside the shaped clamping block assembly 42. This allows for adaptation to the irregular surfaces, slopes, and height differences of the sheet metal parts, preventing workpiece deformation caused by rigid clamping. An anti-slip plate 43 is located below the shaped clamping block assembly 42, at the bottom of the movable base 21.

[0034] The clamping assembly adopts a reverse helical tooth meshing structure. The helical tooth rods 41 on both sides can be independently subjected to force and independently fed. Combined with the axial sliding compensation characteristics of the limit drive rod 24, it can achieve double-sided unequal distance adaptive clamping for sheet metal workpieces with uneven heights and irregular curved surfaces, solving the technical defects of traditional fixtures that can only clamp horizontally on a plane and cannot adapt to irregular sheet metal.

[0035] During operation, the distance between the two moving seats 21 is adjusted via the control terminal 12 to match the width of the sheet metal workpiece, and the workpiece is placed between the anti-slip plate 43 and the irregular clamping block assembly 42. The rotating disk 22 drives the limit drive rod 24 and the threaded drive rod assembly 25 to rotate, engaging the helical gear assembly 41 to move downwards and clamp the workpiece. When one side of the irregular clamping block assembly 42 contacts the workpiece and stops, the limit drive rod 24 slides along the bearing disk 23, rotating disk 22, and ratchet disk 32 for compensation, allowing the helical gear assembly 41 on the other side to continue moving downwards and conforming to the workpiece surface, working in conjunction with the internal rotating block to adaptively match the shape of the irregular workpiece. During clamping, the ratchet disk 32 is locked in one direction by the limiting teeth 34, and the coil spring 33 stores energy to prevent reverse rotation, ensuring the clamping remains secure. After welding is completed, the limit slide rod 38 is pressed down, releasing the ratchet disk 32 from locking, and the coil spring 33 rebounds, causing the entire mechanism to reset quickly, releasing the workpiece clamp.

[0036] Based on the above embodiments, the following is the complete working process and working principle of the above embodiments: Workpiece adaptation and pre-positioning steps Before welding sheet metal parts, the sheet metal parts to be welded are placed stably on the top surface of the anti-slip plate 43, so that the overall clamping area of ​​the sheet metal parts is between the irregular clamping block group 42 and the anti-slip plate 43. The operator adjusts the relative distance between the two moving seats 21 through the control terminal 12 to complete the lateral adaptation adjustment according to the actual width of the sheet metal parts, so that the device can adapt to the clamping requirements of sheet metal workpieces of different widths and specifications, realize the pre-alignment of the workpiece, and provide basic positioning conditions for subsequent precise clamping.

[0037] Synchronous clamping drive steps After adjusting the lateral spacing, manually rotate the rotating disk 22. The rotating disk 22 drives the limit drive rod 24 to rotate synchronously, and the limit drive rod 24 further drives the threaded drive rod assembly 25 fixed on the outer wall to rotate synchronously. The threaded drive rod assembly 25 and the helical gear assembly 41 form a meshing transmission structure. Relying on the rotational driving force of the threaded drive rod assembly 25, the helical gear assemblies 41 on both sides slide vertically downward along the inside of the moving seat 21, so that the irregular clamping block assembly 42 at the bottom of the helical gear assembly 41 moves down synchronously and gradually approaches the upper surface of the sheet metal part, realizing the synchronous feeding and clamping action of the clamping structure on both sides.

[0038] Irregular sheet metal adaptive fitting and clamping steps When the surface of the sheet metal parts to be processed has irregular structures such as height differences, slopes, and irregular curved surfaces, the irregular clamping block group 42 on the higher side will preferentially contact the workpiece surface and stop moving downward due to the workpiece limit. At this time, the rotating disk 22 continues to rotate, and the limit drive rod 24 can adaptively slide and compensate inside the bearing disk 23 and the ratchet disk 32 to ensure that the transmission structure does not jam or lock; the thread drive rod group 25 continues to maintain the meshing transmission state, driving the helical tooth rod group 41 on the other side that is not in contact with the workpiece to continue to move downward for feeding.

[0039] Meanwhile, the multiple rotating blocks inside the irregular clamping block assembly 42 can rotate freely, adaptively deflecting and fitting according to the tilt angle and curved shape of the sheet metal parts, avoiding local indentations and micro-deformation of the sheet metal caused by rigid clamping. Finally, the two irregular clamping block assemblies 42 on both sides fit against the surfaces of the workpiece at different heights, and together with the bottom anti-slip plate 43, form an upper and lower clamping positioning, realizing all-round fitting and clamping of irregularly shaped sheet metal parts with height differences, improving the adaptability of irregularly shaped sheet metal welding clamping.

[0040] The limiting drive rod 24 can slide and compensate within the bearing disk 23, rotating disk 22, and ratchet disk 32, enabling the clamping structures on both sides to have independent feeding capabilities. For sheet metal parts with height differences, inclined surfaces, or irregular curved surfaces, it can achieve priority fitting on one side and continuous feeding on the other side. In conjunction with the internal rotating block of the irregular clamping block group 42, it adaptively fits the workpiece contour, solving the problem that traditional fixtures cannot adapt to the clamping of irregular sheet metal parts, avoiding workpiece misalignment or rigid extrusion deformation, and improving the welding adaptation range and positioning fitting accuracy of irregular sheet metal workpieces.

[0041] Anti-reverse self-locking pressure holding steps During the rotation and clamping process of the limit drive rod 24, the limit drive rod 24 synchronously drives the ratchet disk 32 to rotate, causing the coil spring 33 to continuously coil and store energy. The limit tooth 34, which is rotatably connected to the top of the positioning frame 31, always closely abuts against the tooth surface of the ratchet disk 32 under the elastic pushing action of the first return spring 35, forming a one-way limit structure.

[0042] This structure restricts the ratchet disc 32 and the limit drive rod 24 from rotating in opposite directions, effectively counteracting the springback stress of the sheet metal workpiece and the welding vibration stress, and preventing the helical toothed rod assembly 41 and the irregular clamping block assembly 42 from loosening or slipping. Constant clamping pressure is maintained throughout the entire process by mechanical self-locking, eliminating the need for continuous manual tightening and ensuring that the workpiece positioning remains unchanged throughout the welding process.

[0043] By engaging the limiting tooth 34 with the ratchet disc 32 in a one-way contact, and with the energy stored in the coil spring 33 to maintain the locked state, the reverse rotation of the limiting drive rod 24 can be effectively limited. This can counteract the springback stress of the sheet metal workpiece and the equipment vibration and thermal deformation stress during the welding process, continuously maintain a stable clamping preload, prevent the clamping structure from loosening or slipping, ensure stable positioning throughout the welding process, reduce quality defects such as weld misalignment and poor forming, and improve the accuracy of sheet metal welding and the yield of finished products.

[0044] Mechanical linkage unlocking and reset steps After the sheet metal parts welding process is completed, when it is necessary to release the workpiece clamping state, press down on the limiting slide bar 38 to move the limiting slide bar 38 down along the limiting slide groove 37 and compress the second return spring 39. During the downward movement, the limiting slide bar 38 abuts against the spacer block 36, pushing the spacer block 36 to drive the limiting tooth 34 to rotate away from the ratchet disk 32, so that the limiting tooth 34 disengages from the tooth surface of the ratchet disk 32, releasing the one-way locking constraint of the ratchet disk 32.

[0045] At this point, the coil spring 33, in its energy storage state, elastically extends and resets, driving the ratchet disc 32 to rotate in the opposite direction. The ratchet disc 32 then drives the limit drive rod 24 to rotate synchronously in the opposite direction. The limit drive rod 24, through the threaded drive rod assembly 25, engages with the helical toothed rod assembly 41 to move vertically upward, causing the irregular clamping block assembly 42 to lift synchronously, completely releasing the clamping constraint on the sheet metal parts. After the limit slide bar 38 is released, the second return spring 39 pushes the limit slide bar 38 to reset, and the first return spring 35 drives the limit tooth 34 to re-engage with the ratchet disc 32. The device automatically returns to its self-locking standby state and can directly proceed to the next workpiece clamping operation.

[0046] This device employs a purely mechanical linkage unlocking structure. Pressing the limit slide bar 38 releases the ratchet lock, and the spring 33 elastically resets the clamping structure, allowing for rapid workpiece unloading. Compared to the traditional method of manually loosening and unlocking the locking structure one by one, this simplifies the clamping and unlocking process, shortens workpiece changeover and loading / unloading time, and improves the efficiency of continuous sheet metal welding operations.

[0047] Meanwhile, the entire system adopts a mechanical structure with linkage and coordination, eliminating reliance on sensor components. It features high structural integration, low failure rate, and excellent vibration and high-temperature resistance, making it suitable for the harsh working conditions of welding workshops with dust, high temperatures, and continuous vibration. Maintenance is simple, and operating costs are lower. Furthermore, the equipment can clamp and position sheet metal workpieces of various specifications and irregular shapes, demonstrating strong versatility and meeting the high-precision welding production needs of diverse sheet metal parts.

[0048] While several embodiments and implementations of the present invention have been described for those skilled in the art, these embodiments and implementations are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, and are included within the scope of the invention as described in the claims and its equivalents.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-precision sheet metal parts welding processing device, comprising a welding table (11) and a control terminal (12), wherein the control terminal (12) is disposed on the welding table (11), characterized in that, The top of the welding table (11) is symmetrically provided with a drive assembly, an anti-reverse reset assembly and a clamping assembly; The drive assembly includes a movable seat (21), which is located on the top of the welding table (11). Rotary disks (22) are symmetrically rotatably connected to both sides of the movable seat (21). Bearing disks (23) are symmetrically installed on the top of the movable seat (21). Limiting drive rods (24) are slidably connected inside the two bearing disks (23). The anti-reverse reset assembly includes a positioning frame (31), which is fixedly connected to the top of the inner cavity of the movable seat (21). A ratchet disk (32) is rotatably connected to one end of the positioning frame (31) away from the movable seat (21), and a coil spring (33) is sleeved on the outer side of the ratchet disk (32).

2. The high-precision sheet metal parts welding processing device according to claim 1, characterized in that, The limiting drive rod (24) is slidably connected inside the rotating disk (22).

3. The high-precision sheet metal parts welding processing device according to claim 1, characterized in that, The drive assembly includes a threaded drive rod assembly (25), which is fixedly connected to the outer wall of the limit drive rod (24).

4. The high-precision sheet metal parts welding processing device according to claim 1, characterized in that, One end of the coil spring (33) is fixedly connected to the ratchet disc (32), and the other end of the coil spring (33) is fixedly connected to the positioning frame (31).

5. The high-precision sheet metal parts welding processing device according to claim 1, characterized in that, The anti-reverse reset assembly includes a limiting tooth (34), which is rotatably connected to the top of the positioning frame (31) and abuts against the ratchet disc (32). First reset springs (35) are symmetrically arranged on both sides of the limiting tooth (34). One end of each of the two first reset springs (35) is fixedly connected to the limiting tooth (34), and the other end of each of the two first reset springs (35) is fixedly connected to the positioning frame (31).

6. The high-precision sheet metal parts welding processing device according to claim 5, characterized in that, The anti-reverse reset assembly includes a distance extender block (36), which is fixedly connected to the limiting tooth (34). A limiting groove (37) is provided on the top of the moving seat (21). A limiting rod (38) is slidably connected inside the limiting groove (37). A second reset spring (39) is sleeved on the outside of the limiting rod (38). One end of the second reset spring (39) is fixedly connected to the limiting rod (38), and the other end of the second reset spring (39) away from the limiting rod (38) is fixedly connected to the moving seat (21).

7. The high-precision sheet metal parts welding processing device according to claim 6, characterized in that, The limiting slide bar (38) is positioned above the distance extending block (36), and the distance extending block (36) is positioned on the movement path of the limiting slide bar (38).

8. The high-precision sheet metal parts welding processing device according to claim 1, characterized in that, The limiting drive rod (24) is slidably connected inside the ratchet disk (32).

9. A high-precision sheet metal parts welding processing device according to claim 1, characterized in that, The clamping assembly includes a helical gear assembly (41) which is slidably connected inside the movable seat (21) and engages with a threaded drive rod assembly (25).

10. A high-precision sheet metal parts welding processing device according to claim 9, characterized in that, The clamping assembly includes a shaped clamping block group (42), which is fixedly connected to the bottom of the helical toothed rod group (41). An anti-slip plate (43) is provided below the shaped clamping block group (42), and the anti-slip plate (43) is provided at the bottom of the movable seat (21).

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