Welding device for sheet metal materials

Abstract

The invention relates to the technical field of sheet metal welding, in particular to a sheet metal material welding device which comprises a working table, a welding machine used for welding is arranged on the working table, two limiting assemblies which are symmetrically arranged in the inclined direction are arranged on one side of the welding machine, and locking assemblies are arranged on the limiting assemblies. An alignment device is arranged at the side end of each locking assembly, a matching assembly is arranged on each alignment device, and each alignment device comprises an alignment assembly and a synchronization assembly. Through work of the limiting assembly and the alignment device, the welding face of the sheet metal part can be automatically polished, meanwhile, the welding position is cleaned after welding is completed, and the welding efficiency and convenience are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal welding, in particular to a welding device for sheet metal materials. Background Art

[0002] Sheet metal is a comprehensive cold processing technology for thin metal plates, including shearing, punching / cutting / combining, folding, welding, riveting, splicing, forming, etc.

[0003] In the prior art, when welding two sheet metal parts, it is usually necessary to manually grind the welding surfaces of the two sheet metal parts to avoid gaps when they are connected. The work steps are cumbersome and the welding efficiency is low. At the same time, when the two sheet metal parts are aligned and the welding is completed, a slight bulge often appears on the outer sides of the two sheet metal parts that are connected. Other equipment is required to align the surfaces for processing to ensure the welding quality, which is not convenient enough. Therefore, there is a need for a device that can automatically grind the welding surfaces of the sheet metal parts and clean the welding points after welding is completed to avoid low welding efficiency and lack of convenience. Summary of the Invention

[0004] The object of the present invention is to provide a welding device for sheet metal materials to solve the problems raised in the above-mentioned background technology. To achieve the above-mentioned object, the present invention provides the following technical solution: a welding device for sheet metal materials, comprising a work table, a welding machine for welding being provided on the work table, two obliquely symmetrically arranged limiting assemblies being provided on one side of the welding machine, a locking assembly being provided on the limiting assemblies, a positioning device being provided on the side end of each of the locking assemblies, a mating assembly being provided on the positioning device, the positioning device comprising an alignment assembly and a synchronization assembly, the alignment assembly being provided on one side of the locking assembly, and the synchronization assembly being provided on the side end of the alignment assembly.

[0005] Preferably, the limit assembly includes a guide frame, the bottom of the guide frame is connected to the top of the work table, and the side end of the guide frame is slidingly matched with a first limit frame and a second limit frame, the bottom of the first limit frame and the second limit frame are both slidingly matched with the top of the work table, and the second limit frame is provided with a first spring telescopic rod at the center of one side close to the first limit frame, the telescopic end of the first spring telescopic rod is connected to the side end of the first limit frame, and movable telescopic rods are symmetrically arranged horizontally on both sides of the first spring telescopic rod, and the telescopic end of the movable telescopic rod is slidably arranged in the sliding groove of the first limit frame.

[0006] Preferably, spring blocks are symmetrically provided on the telescopic end of the movable telescopic rod, and the spring blocks are clamped in the openings on the inner wall of the sliding groove. A plurality of teeth are evenly provided on the side of the second limit frame away from the guide frame.

[0007] Preferably, the locking assembly includes a trigger column, which is arranged on a side of the second limit frame away from the teeth, and the end of the trigger column is located in a guide groove on the guide frame. A splint is provided on the side of the guide frame away from the second limit frame, and both ends of the splint are movably connected to the side end of the guide frame through a second spring telescopic rod. The side of the splint close to the guide groove is provided with an arc-shaped piece that cooperates with the trigger column, and the other side of the splint is provided with a bayonet, and the side end of the first limit frame is provided with a telescopic card rod, which is located in the guide groove and slidably cooperates with it, and the end of the telescopic card rod can be clamped into the bayonet.

[0008] Preferably, the alignment assembly includes a fan-shaped part, which is rotatably set on the work table, and the arcuate surface of the fan-shaped part is set toward the arcuate part. An arcuate slide rail is provided on the arcuate surface of the fan-shaped part, and an arcuate toothed rod is slidably provided on the arcuate slide rail. The toothed end of the arcuate toothed rod can engage with a plurality of teeth. A hinged rod is hinged in the middle of the fan-shaped part, and the other end of the hinged rod is hinged to the end of a rotating crank. The other end of the rotating crank is rotatably set on the work table through a rotating shaft, and the bottom of the rotating shaft is connected to the output end of the drive motor.

[0009] Preferably, the synchronization component includes a synchronization gear rotatably arranged on the work table, the tooth groove end of the synchronization gear can mesh with the tooth groove end of the arc-shaped tooth groove rod, the synchronization gear is located on one side of the guide frame, and a rotating disk concentrically arranged therewith is provided below the synchronization gear and is located below the work table, a vertically arranged pull rod is provided at the bottom of the rotating disk, and a connecting rod is provided on one side of the rotating disk, the end of the connecting rod is rotatably connected to the bottom of the work table, a linkage groove is provided on the connecting rod, the pull rod is embedded in the linkage groove and slidably cooperates with it, a mating groove is provided at the side end of the linkage groove and is located on the connecting rod, a mating rod is slidably fitted in the mating groove, the top of the mating rod is connected to the bottom of the mating frame, and the mating frame slidably cooperates with the work table.

[0010] Preferably, the mating assembly includes a mating connecting rod, which is located above the work table and the end of the mating connecting rod is connected to the top of the mating frame. The other end of the mating connecting rod is connected to the top of the grinding frame through a vertically arranged third spring telescopic rod. The grinding frame is slidably matched with the work table. An L-shaped wedge rod is provided at one end of the grinding frame away from the mating connecting rod, and both sides of the grinding frame are movably connected with symmetrically arranged arc-shaped grinding parts through damping springs.

[0011] Preferably, the side end of the work table is provided with a conflicting wedge frame that can cooperate with the L-shaped wedge rod. When the L-shaped wedge rod conflicts with the conflicting wedge frame, the grinding frame can be moved upward under the action of the third spring telescopic rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, when the device is used, the worker places the sheet metal parts to be processed on the side ends of a limiting component respectively, and then controls the alignment component to work, thereby driving the two limiting components to drive the two sheet metal parts to align with each other until they are in contact and fit together. During the alignment process, the contact surfaces of the two sheet metal parts are polished by the provided synchronization component, thereby avoiding the occurrence of gaps during docking, simplifying the work steps and improving welding efficiency. At the same time, after alignment, the position of the sheet metal parts is limited. At the same time, the vertical surfaces of the two sheet metal parts are polished, and the parts are moved to the top of the sheet metal parts and pressed against the workpiece to maintain stability during welding. Then welding is carried out, and after welding is completed, the limiting component is separated from the end away from the sheet metal part, and the synchronization component is driven to reset. During the reset process, the outside of the top welding area of ​​the sheet metal part is cleaned until the separation of the locking component is reset, and the other part of the locking component is unlocked to complete the reset, and the workpiece is unlocked, thereby avoiding the occurrence of slight bulges on the outer sides of the two sheet metal parts, thereby ensuring welding quality and improving convenience during use.

[0013] In the present invention, through the coordinated use of components such as the limit assembly and the alignment device, the mating surfaces of the two sheet metal parts can be driven to approach each other until they are aligned. During the alignment process, the mating surfaces of the sheet metal parts are polished by the synchronization assembly, thereby avoiding the occurrence of gaps during docking, simplifying the work steps and improving welding efficiency.

[0014] In the present invention, through the coordinated use of components such as the positioning device and the matching components, when the two sheet metal parts are approaching each other, the vertical surfaces of the two sheet metal parts are polished by the arc-shaped polishing parts until the bottom of the polishing frame abuts against the top of the sheet metal parts, providing a certain fixing effect on the sheet metal parts. After welding is completed, the outside of the welding area on the top of the two sheet metal parts is cleaned. After the cleaning is completed, the workpiece is unlocked, thereby avoiding the occurrence of slight bulges on the outside of the two sheet metal parts that are connected, thereby ensuring the welding quality, improving the convenience during use, facilitating the next welding work, and ensuring continuity in work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the three-dimensional structure of the present invention Figure 1 ; Figure 2 Schematic diagram of the three-dimensional structure of the present invention Figure 2 ; Figure 3 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 1 ; Figure 4 Schematic diagram of the local three-dimensional structure of the limiting component in the present invention Figure 1; Figure 5 A partial cross-sectional view of the position limiting assembly of the present invention; Figure 6 Schematic diagram of the local three-dimensional structure of the limiting component in the present invention Figure 2 ; Figure 7 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 2 ; Figure 8 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 3 ; Figure 9 It is a schematic diagram of a partial three-dimensional structure of the alignment device in the present invention; Figure 10 It is a schematic diagram of the partial explosion three-dimensional structure of the present invention; Figure 11 It is a schematic diagram of the partial three-dimensional structure of the matching components in the present invention.

[0016] In the figure: 1. Work table; 2. Welding machine; 3. Limiting assembly; 31. Guide frame; 32. First limiting frame; 33. Second limiting frame; 34. First spring telescopic rod; 35. Movable telescopic rod; 36. Sliding groove; 37. Spring block; 38. Opening; 39. Tooth; 4. Locking assembly; 41. Trigger column; 42. Guide groove; 43. Clamp; 44. Second spring telescopic rod; 45. Arc member; 46. Bayonet; 47. Telescopic clamping rod; 5. Alignment device; 51. Alignment assembly; 511. Sector member; 512. Arc slide rail ; 513, arc-shaped toothed rod; 514, hinged rod; 515, rotating crank; 516, rotating shaft; 517, driving motor; 52, synchronization component; 521, synchronization gear; 522, rotating disk; 523, pull rod; 524, connecting rod; 525, linkage groove; 526, matching groove; 527, matching rod; 528, matching frame; 6, matching component; 61, matching connecting rod; 62, third spring telescopic rod; 63, grinding frame; 64, L-shaped wedge rod; 65, damping spring; 66, arc-shaped grinding piece; 67, contact wedge frame. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] See also Figures 1 to 11The present invention provides a technical solution: a welding device for sheet metal materials, comprising a work table 1, wherein the work table 1 is provided with a welding machine 2 for welding, one side of the welding machine 2 is provided with two obliquely symmetrical limiting components 3, the limiting component 3 is provided with a locking component 4, and each side end of the locking component 4 is provided with a positioning device 5, the positioning device 5 is provided with a matching component 6, the positioning device 5 includes an alignment component 51 and a synchronization component 52, the alignment component 51 is arranged on one side of the locking component 4, and the synchronization component 52 is arranged at the side end of the alignment component 51.

[0019] In this embodiment, Figures 1 to 9 As shown, the limiting assembly 3 includes a guide frame 31, the bottom of the guide frame 31 is connected to the top of the work table 1, and the side end of the guide frame 31 is slidably matched with a first limiting frame 32 and a second limiting frame 33, the bottoms of the first limiting frame 32 and the second limiting frame 33 are both slidably matched with the top of the work table 1, and the second limiting frame 33 is provided with a first spring telescopic rod 34 at the center of one side near the first limiting frame 32, the telescopic end of the first spring telescopic rod 34 is connected to the side end of the first limiting frame 32, and movable telescopic rods 35 arranged horizontally are symmetrically arranged on both sides of the first spring telescopic rod 34, and the telescopic end of the movable telescopic rod 35 is slidably set in the sliding groove 36 of the first limiting frame 32; The telescopic end of the movable telescopic rod 35 is symmetrically provided with a spring block 37, which is fixed in an opening 38 on the inner wall of the sliding groove 36. The second limit frame 33 is evenly provided with a plurality of teeth 39 on the side away from the guide frame 31. The locking assembly 4 includes a trigger column 41, which is arranged on a side of the second limit frame 33 away from the teeth 39, and the end of the trigger column 41 is located in a guide groove 42 on the guide frame 31. A clamping plate 43 is provided on the side of the guide frame 31 away from the second limit frame 33, and both ends of the clamping plate 43 are movably connected to the side ends of the guide frame 31 through a second spring telescopic rod 44. A curved piece 45 that cooperates with the trigger column 41 is provided on the side of the clamping plate 43 close to the guide groove 42, and a bayonet 46 is provided on the other side of the clamping plate 43. A telescopic clamping rod 47 is provided at the side end of the first limit frame 32, and the telescopic clamping rod 47 is located in the guide groove 42 and slidably cooperates with it, and the end of the telescopic clamping rod 47 can be clamped into the bayonet 46; The alignment assembly 51 includes a fan-shaped member 511, which is rotatably arranged on the work table 1. The arcuate surface of the fan-shaped member 511 is arranged toward the arcuate member 45. An arcuate slide rail 512 is provided on the arcuate slide rail 512. An arcuate toothed rod 513 is slidably provided on the arcuate toothed rod 513. The toothed end of the arcuate toothed rod 513 can engage with a plurality of teeth 39. The middle part of the fan-shaped member 511 is hinged with a hinge rod 514. The other end of the hinge rod 514 is hinged to the end of a rotating crank 515. The other end of the rotating crank 515 is rotatably arranged on the work table 1 via a rotating shaft 516. The bottom of the rotating shaft 516 is connected to the output end of the driving motor 517. The synchronous assembly 52 includes a synchronous gear 521 rotatably arranged on the work table 1, and the tooth groove end of the synchronous gear 521 can mesh with the tooth groove end of the arc-shaped tooth groove rod 513. The synchronous gear 521 is located on one side of the guide frame 31, and a rotating disk 522 is provided below the synchronous gear 521 and is concentrically arranged therewith and is located below the work table 1. The bottom of the rotating disk 522 is provided with a vertically arranged pull rod 523, and one side of the rotating disk 522 is provided with a connecting rod 524, and the end of the connecting rod 524 is rotatably connected to the bottom of the work table 1. The connecting rod 524 is provided with a linkage groove 525, and the pull rod 523 is embedded in the linkage groove 525 and slidably cooperates with it. The side end of the linkage groove 525 is provided with a matching groove 526 and is located on the connecting rod 524. A matching rod 527 is slidably fitted in the matching groove 526, and the top of the matching rod 527 is connected to the bottom of the matching frame 528, and the matching frame 528 slides with the work table 1.

[0020] In this embodiment, Figures 3 to 11 As shown, the mating assembly 6 includes a mating link 61, which is located above the work table 1 and has an end connected to the top of the mating frame 528. The other end of the mating link 61 is connected to the top of a grinding frame 63 via a vertically arranged third spring telescopic rod 62. The grinding frame 63 is slidably engaged with the work table 1. An L-shaped wedge rod 64 is provided at one end of the grinding frame 63 away from the mating link 61. Both sides of the grinding frame 63 are movably connected to symmetrically arranged arc-shaped grinding members 66 via damping springs 65. The side end of the work table 1 is provided with a conflicting wedge frame 67 that can cooperate with the L-shaped wedge rod 64. When the L-shaped wedge rod 64 conflicts with the conflicting wedge frame 67, the grinding frame 63 can be moved upward under the action of the third spring telescopic rod 62.

[0021] The use method and advantages of the present invention: A welding device for sheet metal materials, the working process is as follows: like Figures 1 to 11As shown, by controlling the two driving motors 517 to work, the two rotating cranks 515 are driven to rotate, and under the action of the hinge rod 514, the two sector parts 511 are deflected in relative directions, thereby driving the arc-shaped toothed rod 513 to cooperate with the teeth 39, so that the first limit frame 32 and the second limit frame 33 slide along the guide frame 31. At this time, the movable telescopic rod 35 is clamped into the opening 38 of the sliding groove 36 by the spring clamping block 37, so that the butt joint surfaces of the two sheet metal parts are brought closer to each other until they are aligned. In the process of alignment, the butt joint surfaces of the sheet metal parts are polished by the synchronization component 52, so as to avoid the occurrence of gaps during docking, simplifying the working steps and improving the welding efficiency. As the two sheet metal parts approach each other, the arc-shaped toothed rod 513 synchronously drives the synchronous gear 521 meshing with it to rotate, so that the rotating disk 522 rotates synchronously, and the cooperation between the pull rod 523 and the linkage groove 525 enables the connecting rod 524 to swing at the bottom of the work table 1, and then drives the matching frame 528 to move along the direction of the work table 1 under the cooperation of the matching groove 526 and the matching rod 527, thereby driving the matching connecting rod 61 to drive the grinding frame 63 to move along the direction of the work table 1 toward the direction of the wedge frame 67, and in the process of movement, the grinding frame 63 grinds the mating surface of the sheet metal parts. When the two sheet metal parts are docked, the second limit frame 33 can continue to move through the first spring telescopic rod 34. The arc-shaped grinding member 66 is driven by the third spring telescopic rod 62 to grind the vertical surfaces of the two sheet metal parts through the arc-shaped grinding member 66 until the bottom of the grinding frame 63 is in contact with the top of the sheet metal part, providing a certain fixing effect on the sheet metal part. When the sheet metal parts are aligned, the telescopic clamping rod 47 at the side end of the first limiting frame 32 can be embedded in the bayonet 46, ensuring the limitation of the sheet metal part by the first limiting frame 32, thereby ensuring the stability of the welding process. Subsequently, the two sheet metal parts are welded by the welding machine 2, and after the welding is completed, the fan-shaped part 511 is held The arc-shaped toothed rod 513 continues to rotate. At this time, the arc-shaped toothed rod 513 slides along the arc-shaped slide rail 512. When the side end of the arc-shaped slide rail 512 contacts the side end of the arc-shaped toothed rod 513, the synchronous gear 521 is driven to rotate. Through the cooperation of the rotating disk 522 and the pull rod 523, the connecting rod 524 is driven to deflect in the opposite direction to the previous direction, thereby driving the matching connecting rod 61 to drive the grinding frame 63 to move along the top of the sheet metal, thereby cleaning the outside of the welding area at the top of the two sheet metal parts. In this process, the second limit frame 33 is separated from the first limit frame 32 by the first spring telescopic rod 34, and after the movable telescopic rod 35 is stretched to the extreme, the spring block 37 disengages from the hole 38, so that the second limit frame 33 is separated from the first limit frame 32 After the grinding frame 63 is cleaned, the second limit frame 33 drives the trigger column 41 to contact the side end of the arc-shaped member 45, thereby driving the splint 43 along the second spring telescopic rod 44 away from the guide frame 31, thereby driving the bayonet 46 away from the telescopic clamping rod 47. Under the action of the first spring telescopic rod 34, the first limit frame 32 quickly moves along the guide frame 31 toward the direction of the second limit frame 33 away from the sheet metal part, and makes the spring block 37 on the movable telescopic rod 35 be stuck in the opening 38, thereby unlocking the workpiece, thereby avoiding the situation where a slight bulge appears on the outer side of the two sheet metal parts facing each other, thereby ensuring the welding quality, improving the convenience during use, facilitating the next welding work, and ensuring the continuity of work.

[0022] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for sheet metal materials, comprising a work table (1), wherein a welding machine (2) for welding is provided on the work table (1); Its characteristics are: One side of the welding machine (2) is provided with two obliquely symmetrically arranged limiting assemblies (3), the limiting assemblies (3) are provided with locking assemblies (4), and each side end of the locking assemblies (4) is provided with a positioning device (5), and the positioning device (5) is provided with a matching assembly (6), and the positioning device (5) includes an alignment assembly (51) and a synchronization assembly (52), the alignment assembly (51) is arranged on one side of the locking assembly (4), and the synchronization assembly (52) is arranged on the side end of the alignment assembly (51).

2. The sheet metal welding device according to claim 1, characterized in that: The limiting assembly (3) includes a guide frame (31) connected to the top of the work table (1), the side end of the guide frame (31) is slidably matched with a first limiting frame (32) and a second limiting frame (33), the second limiting frame (33) is provided with a first spring telescopic rod (34) at the center of one side close to the first limiting frame (32), the telescopic end of the first spring telescopic rod (34) is connected to the side end of the first limiting frame (32), and movable telescopic rods (35) are symmetrically arranged horizontally on both sides of the first spring telescopic rod (34), and the telescopic end of the movable telescopic rod (35) is slidably arranged in a sliding groove (36) of the first limiting frame (32).

3. The sheet metal welding device according to claim 2, characterized in that: A spring block (37) is symmetrically provided on the telescopic end of the movable telescopic rod (35), and the spring block (37) is clamped in an opening (38) on the inner wall of the sliding groove (36). A plurality of teeth (39) are evenly provided on the side of the second limiting frame (33) away from the guide frame (31).

4. The sheet metal welding device according to claim 3, characterized in that: The locking assembly (4) includes a trigger column (41) arranged on a side of the second limiting frame (33) away from the teeth (39), the end of the trigger column (41) is located in a guide groove (42) on the guide frame (31), and a clamping plate (43) is provided on the side of the guide frame (31) away from the second limiting frame (33). Both ends of the clamping plate (43) are movably connected to the side ends of the guide frame (31) through a second spring telescopic rod (44). A side of the clamping plate (43) close to the guide groove (42) is provided with an arc-shaped member (45) that matches the trigger column (41), and a bayonet (46) is provided on the other side of the clamping plate (43). A telescopic clamping rod (47) is provided on the side end of the first limiting frame (32), and the telescopic clamping rod (47) is located in the guide groove (42) and slidably matched therewith, and the end of the telescopic clamping rod (47) can be clamped into the bayonet (46).

5. The sheet metal welding device according to claim 4, characterized in that: The alignment component (51) includes a fan-shaped member (511) rotatably arranged on the work table (1), the arc surface of the fan-shaped member (511) is arranged toward the arc-shaped member (45), the arc surface of the fan-shaped member (511) is provided with an arc-shaped slide rail (512), the arc-shaped toothed rod (513) is slidably provided on the arc-shaped slide rail (512), the toothed end of the arc-shaped toothed rod (513) can be engaged with a plurality of teeth (39), the middle part of the fan-shaped member (511) is hinged with a hinged rod (514), the other end of the hinged rod (514) is hinged to the end of a rotating crank (515), the other end of the rotating crank (515) is rotatably arranged on the work table (1) through a rotating shaft (516), and the bottom of the rotating shaft (516) is connected to the output end of the drive motor (517).

6. The sheet metal welding device according to claim 5, characterized in that: The synchronization assembly (52) includes a synchronization gear (521) rotatably arranged on the work table (1), the tooth groove end of the synchronization gear (521) can mesh with the tooth groove end of the arc-shaped tooth groove rod (513), a rotating disk (522) is provided below the synchronization gear (521) and is concentrically arranged therewith and is located below the work table (1), a vertically arranged pull rod (523) is provided at the bottom of the rotating disk (522), and a connecting rod (524) is provided on one side of the rotating disk (522). The end of the connecting rod (524) is rotatably connected to the bottom of the work table (1), and a linkage groove (525) is provided on the connecting rod (524). The pull rod (523) is embedded in the linkage groove (525) and slidably cooperates with it. The side end of the linkage groove (525) is provided with a matching groove (526) and is located on the connecting rod (524). A matching rod (527) is slidably cooperated in the matching groove (526), ​​and the top of the matching rod (527) is connected to the bottom of the matching frame (528).

7. The sheet metal welding device according to claim 6, characterized in that: The mating assembly (6) includes a mating connecting rod (61), the mating connecting rod (61) is located above the work table (1), and the end of the mating connecting rod (61) is connected to the top of the mating frame (528), the other end of the mating connecting rod (61) is connected to the top of the grinding frame (63) through a vertically arranged third spring telescopic rod (62), the grinding frame (63) and the work table (1) are slidably matched, and an L-shaped wedge rod (64) is provided at one end of the grinding frame (63) away from the mating connecting rod (61), and both sides of the grinding frame (63) are movably connected to symmetrically arranged arc-shaped grinding pieces (66) through damping springs (65).

8. The sheet metal welding device according to claim 7, characterized in that: The side end of the work table (1) is provided with a conflicting wedge frame (67) capable of cooperating with the L-shaped wedge rod (64). When the L-shaped wedge rod (64) conflicts with the conflicting wedge frame (67), the grinding frame (63) can be moved upward under the action of the third spring telescopic rod (62).

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