Device for welding metal parts

Abstract

The invention discloses a device for metal parts welding processing, which relates to the technical field of metal welding, comprising a welding frame, a clamping device and a supporting device, wherein an annular rack is rotatably mounted on the inner wall of the welding frame, a welding gun is fixedly mounted on the inner wall of the annular rack, and a placing frame is fixedly mounted on the surface of the welding frame, wherein the clamping device comprises a placing rod, a placing plate, a rotating rod, a limiting plate, a limiting rod and a rubber block, the limiting plate cannot rotate so that the limiting plate squeezes the rubber block, and the rubber block can only slowly deform due to the action of the non-Newtonian fluid inside itself, and the slow deformation of the rubber block causes the placing plate to slowly reset, a placing hole is opened on the surface of the placing frame, the placing rod is fixedly mounted on the inner wall of the placing hole, and an adjustable or multifunctional clamp is used to fix the workpiece, which can adapt to workpieces of different lengths and improve the applicability of the production line.

Description

Technical Field

[0001] The invention relates to the technical field of metal welding, in particular to a device used for welding processing of metal parts. Background Art

[0002] The device used for welding metal parts usually consists of clamping devices, welding tools, safety devices and auxiliary devices.

[0003] The patent with patent announcement number CN213438104U relates to a welding device for process pipelines, including a workbench and a top plate, a rectangular groove is opened on the rear side of the upper surface of the workbench, a telescopic motor is provided at the middle position at the bottom of the rectangular groove, a lower clamping plate is provided on the upper surface of the workbench, a connecting plate is provided on the upper surface of the lower clamping plate, an upper clamping plate is connected to the upper surface of the connecting plate, and the connecting plate is connected to the lower clamping plate through a spring, and a storage box is provided inside the workbench. Compared with the prior art, this design adds a telescopic motor, an upper clamping plate, a lower clamping plate and a storage box. This design adjusts the height of the welding head through the telescopic motor, quickly clamps the pipeline through the upper clamping plate and the lower clamping plate, and the welding tools are stored in the storage box to avoid loss. This patent facilitates quick fixing of the pipeline, can adjust the height of the welding head, and is convenient for storing welding tools.

[0004] In the above patent, the pipe is quickly clamped by the upper clamp and the lower clamp, and the welding tools are stored in a storage box to avoid loss, so as to facilitate the quick fixation of the pipe, adjust the height of the welding head, and facilitate the storage of welding tools. However, it is difficult to accurately fix columnar workpieces of different lengths. Columnar workpieces of different lengths may be uneven or swing when clamped, resulting in an unstable welding position, thereby affecting the alignment and accuracy of the welding points during the welding process, resulting in a decrease in welding quality. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a device for welding metal parts, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for welding metal parts, comprising a welding frame, a clamping device and a supporting device, wherein an annular rack is rotatably installed on the inner wall of the welding frame, a welding gun is fixedly installed on the inner wall of the annular rack, and a placement frame is fixedly installed on the surface of the welding frame, wherein the clamping device comprises a placement rod, a placement plate, a rotating rod, a limit plate, a limiting rod and a rubber block, the limit plate cannot rotate so that the limit plate squeezes the rubber block, the rubber block can only slowly deform due to the non-Newtonian fluid inside itself, the rubber block slowly deforms so that the placement plate slowly resets, a placement hole is opened on the surface of the placement frame, the placement rod is fixedly installed on the inner wall of the placement hole, the placement plate is slidably installed on the surface of the placement rod, a protective hole is opened at the bottom of the inner wall of the placement frame, the rotating rod is rotatably installed on the inner wall of the protective hole, the limit plate is fixedly installed on the surface of the rotating rod, the limiting rod is fixedly installed on the inner wall of the protective hole, and the rubber block is fixedly installed on the bottom of the placement plate.

[0007] According to the above technical solution, a clockwork spring is arranged between the rotating rod and the protective hole, a No. 1 spring is arranged between the placing rod and the placing plate, the limit plate is in contact with the limiting rod, and a non-Newtonian fluid is arranged inside the rubber block. The non-Newtonian fluid will solidify instantly when it is squeezed rapidly, resulting in that the non-Newtonian fluid can only be pushed slowly to make it flow.

[0008] According to the above technical solution, the supporting device includes a supporting plate, an adjusting rod, a U-shaped block, a protective rod and a limiting groove. The U-shaped block and the protective rod move up and down to drive the supporting plate to move and contact the bottom of the columnar workpiece. The supporting plate moves and contacts the columnar workpiece to support the bottom of the columnar workpiece. The supporting plate is placed inside the placement frame, the adjusting rod is slidably installed on the bottom of the supporting plate, the U-shaped block is fixedly installed on the surface of the adjusting rod, the protective rod is fixedly installed on the top of the adjusting rod, and a limiting groove is provided on the surface of the placement frame.

[0009] According to the above technical solution, a No. 2 spring is arranged between the support plate and the adjusting rod, the U-shaped block contacts the limiting groove, and the protection rod contacts the placement rack, and the No. 2 spring can drive the adjusting rod to reset.

[0010] According to the above technical scheme, it also includes a detection device and a deceleration device, the detection device includes an airbag, a detection frame, a button, a detection tube, a slide plate and a hollow plate, the slide plate is pressurized by the gas entering the detection tube and moves in a direction close to the welding frame, the movement of the slide plate drives the hollow plate to move, the movement of the hollow plate disengages from the limit of the groove and releases the limit on the button, the airbag is fixedly mounted on the top of the support plate, the detection frame is fixedly mounted on the surface of the welding frame, the button is fixedly mounted on the bottom of the inner wall of the detection frame, the detection tube is fixedly mounted on the surface of the detection frame, the slide plate is slidably mounted on the inner wall of the detection tube, the hollow plate is fixedly mounted on the surface of the slide plate, the button surface is provided with a groove, and the airbag is connected to the inside of the detection tube through a hose.

[0011] According to the above technical solution, the hollow plate is in contact with the groove, a No. 3 spring is provided between the detection tube and the slide plate, the button is electrically connected to the welding gun, and the slide plate can be driven to reset by the No. 3 spring.

[0012] According to the above technical scheme, the deceleration device includes an installation frame, a control rod, an extrusion rod, a deceleration frame, a deceleration plate, a deceleration rod, a fixed rod and a sealing plate. The gas inside the deceleration frame can only flow slowly through the sealing hole, so that the deceleration plate can only move slowly, the deceleration plate can only move slowly, so that the deceleration rod moves slowly, and the deceleration rod moves slowly so that the extrusion rod and the control rod can only rotate slowly. The installation frame is fixedly installed on the surface of the welding frame, the control rod rotates and passes through the surface of the installation frame, a gear is fixedly installed on the surface of the control rod, the extrusion rod is fixedly installed on the surface of the control rod, the deceleration frame is fixedly installed on the surface of the welding frame, the deceleration plate is slidably installed on the inner wall of the deceleration frame, the deceleration rod is fixedly installed on the top of the deceleration plate, the fixed rod is fixedly passed through the surface of the deceleration plate, the sealing plate is slidably installed on the surface of the fixed rod, the deceleration plate surface is provided with a deceleration hole, the sealing plate surface is provided with a sealing hole, and the control rod surface is fixedly installed with a handle.

[0013] According to the above technical solution, a No. 4 spring is arranged between the deceleration frame and the deceleration plate, a No. 5 spring is arranged between the fixing rod and the sealing plate, the gear is meshed with the annular rack, and the deceleration plate can be driven to reset through the No. 4 spring.

[0014] The present invention provides a device for welding metal parts, which has the following beneficial effects:

[0015] (1) The device for metal parts welding processing clamps and fixes two cylindrical workpieces of different lengths by moving the two placement plates toward each other under the elastic force of a No. 1 spring after the two placement plates are loosened. The workpieces are fixed with an adjustable or multifunctional clamp, which can adapt to workpieces of different lengths and improve the applicability of the production line. At the same time, the rubber block can only be deformed slowly due to the non-Newtonian fluid inside it. The slow deformation of the rubber block allows the placement plate to be slowly reset. The slow reset can reduce accidental injuries caused by sudden movement or falling of the workpiece due to the sudden release of the clamping force, thereby giving the operator more time to safely remove the workpiece and reduce the risk of accidents.

[0016] (2) The device for metal parts welding processing releases the limit on the adjustment rod by manually pulling the protection rod in the direction close to the annular rack. The anti-mis-touch device can effectively reduce the risk of accidental injury caused by misoperation and prevent the adjustment rod from being touched by mistake, which causes the support plate to move and lose support for the bottom of the columnar workpiece. At the same time, the U-shaped block and the protection rod move up and down to drive the support plate to move and contact the bottom of the columnar workpiece. The support plate moves and contacts the columnar workpiece to support the bottom of the columnar workpiece. By supporting the bottom of the columnar workpiece, it can ensure that the workpiece maintains a stable position during the welding process, avoiding poor welding quality or uneven welds due to shaking or movement of the workpiece.

[0017] (3) The device for metal parts welding processing moves the slide plate toward the welding frame under the pressure of the gas entering the detection tube. The movement of the slide plate drives the hollow plate to move. The movement of the hollow plate disengages from the limit of the groove to release the limit on the button, ensuring that the bottom of the workpiece is fully supported before starting the welding gun. This can reduce deformation or damage caused by the workpiece losing stable support, protect the workpiece and welding equipment, and improve the safety of the welding process.

[0018] (4) In the device for metal parts welding, the gas inside the deceleration frame can only flow slowly through the sealing hole, so that the extrusion rod and the control rod can only rotate slowly. Controlling the moving speed of the welding gun can ensure that the welding material is fully melted and fused. Moving the welding gun too fast may cause uneven welding and welding defects. These problems can be avoided by controlling the moving speed. At the same time, when the deceleration plate is reset under the elastic force of the No. 4 spring, the gas inside the deceleration frame can flow quickly through the deceleration hole, so that the deceleration plate can be quickly reset. The rapid reset can make the deceleration device quickly return to its original position after completing a deceleration operation, ready for the next deceleration operation, thereby ensuring the efficiency of deceleration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2It is a schematic diagram of the position structure of the welding frame and the annular rack of the present invention;

[0021] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement of part A;

[0022] Figure 4 For the present invention Figure 2 A schematic diagram of the structure of part B in the middle is enlarged;

[0023] Figure 5 It is a schematic diagram of the position structure of the placement rack and the placement rod of the present invention;

[0024] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of the structure of part C in the middle;

[0025] Figure 7 This is a schematic diagram of the position structure of the slide plate and the hollow plate of the present invention;

[0026] Figure 8 It is a schematic diagram of the position structure of the fixing rod and the sealing plate of the present invention.

[0027] In the figure: 1. welding frame; 2. annular rack; 3. welding gun; 4. placing frame; 5. placing rod; 6. placing plate; 7. rotating rod; 8. limiting plate; 9. limiting rod; 10. rubber block; 111. supporting plate; 112. adjusting rod; 113. U-shaped block; 114. protecting rod; 115. limiting groove; 121. airbag; 122. detection frame; 123. button; 124. detection tube; 125. slide plate; 126. hollow plate; 131. mounting frame; 132. control rod; 133. squeezing rod; 134. deceleration frame; 135. deceleration plate; 136. deceleration rod; 137. fixing rod; 138. sealing plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-5An embodiment of the present invention is: a device for welding metal parts, comprising a welding frame 1, a clamping device and a supporting device, wherein an annular rack 2 is rotatably mounted on the inner wall of the welding frame 1, a welding gun 3 is fixedly mounted on the inner wall of the annular rack 2, a placing frame 4 is fixedly mounted on the surface of the welding frame 1, wherein the clamping device comprises a placing rod 5, a placing plate 6, a rotating rod 7, a limiting plate 8, a limiting rod 9 and a rubber block 10, a placing hole is opened on the surface of the placing frame 4, the placing rod 5 is fixedly mounted on the inner wall of the placing hole, the placing plate 6 is slidably mounted on the surface of the placing rod 5, a protective hole is opened at the bottom of the inner wall of the placing frame 4, the rotating rod 7 is rotatably mounted on the inner wall of the protective hole, the limiting plate 8 is fixedly mounted on the surface of the rotating rod 7, the limiting rod 9 is fixedly mounted on the inner wall of the protective hole, and the rubber block 10 is fixedly mounted on the bottom of the placing plate 6. Using an adjustable or multifunctional clamp to fix the workpiece can adapt to workpieces of different lengths, thereby improving the applicability of the production line.

[0030] A clockwork spring is arranged between the rotating rod 7 and the protective hole, a No. 1 spring is arranged between the placing rod 5 and the placing plate 6, the limit plate 8 is in contact with the limiting rod 9, and a non-Newtonian fluid is arranged inside the rubber block 10. The non-Newtonian fluid will solidify instantly when it is squeezed quickly, resulting in the non-Newtonian fluid being able to flow only by slowly pushing it. Slow resetting can reduce accidental injuries caused by sudden movement or falling of the workpiece due to sudden release of the clamping force, thereby reducing the risk of accidents.

[0031] The supporting device includes a supporting plate 111, an adjusting rod 112, a U-shaped block 113, a protective rod 114 and a limiting groove 115. The supporting plate 111 is placed inside the placement frame 4, the adjusting rod 112 is slidably installed at the bottom of the supporting plate 111, the U-shaped block 113 is fixedly installed on the surface of the adjusting rod 112, the protective rod 114 is fixedly installed on the top of the adjusting rod 112, and a limiting groove 115 is provided on the surface of the placement frame 4. By supporting the bottom of the columnar workpiece, it can ensure that the workpiece maintains a stable position during the welding process, avoiding poor welding quality or uneven welds due to shaking or movement of the workpiece.

[0032] A No. 2 spring is provided between the support plate 111 and the adjusting rod 112, the U-shaped block 113 is in contact with the limiting groove 115, the protection rod 114 is in contact with the placement rack 4, and the No. 2 spring can drive the adjusting rod 112 to reset.

[0033] When this embodiment is working: the two placement plates 6 are manually pushed to move away from each other. After the two placement plates 6 move away from each other, the columnar workpiece to be welded is placed inside the placement rack 4. After the position calibration of the two columnar workpieces is completed, the two placement plates 6 are released. After the two placement plates 6 are released, they move toward each other under the elastic force of the No. 1 spring to clamp and fix the two columnar workpieces of different lengths. After the welding process is completed, when the welded columnar workpiece is taken out, the two placement plates 6 move toward each other and reset under the elastic force of the No. 1 spring. The movement of the placement plates 6 drives the rubber block 10 to move. The rubber block 10 moves and contacts with the limit plate 8. At this time, the limit plate 8 is limited by the limit rod 9 and cannot rotate. The limit plate 8 cannot rotate, so that the limit plate 8 squeezes the rubber block 10. The rubber block 10 can only deform slowly due to the non-Newtonian fluid inside itself. The rubber block 10 slowly deforms, causing the placement plates 6 to slowly reset.

[0034] After the position calibration of the two columnar workpieces is completed, the two placing plates 6 are released. After the two placing plates 6 are released, they move toward each other under the elastic force of spring No. 1 to clamp and fix the two columnar workpieces of different lengths. After the columnar workpieces are fixed, first manually pull the protection rod 114 in the direction close to the annular rack 2 to release the limit on the adjusting rod 112. After the limit of the adjusting rod 112 is released, manually pull the U-shaped block 113 and the protection rod 114 to move out of the limit of the limiting groove 115. After the limit of the U-shaped block 113 is released, manually pull the U-shaped block 113 and the protection rod 114 to move up and down. The up and down movement of the U-shaped block 113 and the protection rod 114 drives the support plate 111 to move and contact with the bottom of the columnar workpiece. The support plate 111 moves to contact with the columnar workpiece to support the bottom of the columnar workpiece.

[0035] See also Figure 1-8 On the basis of the above embodiment, another embodiment of the present invention further includes a detection device and a deceleration device, the detection device includes an airbag 121, a detection frame 122, a button 123, a detection tube 124, a slide plate 125 and a hollow plate 126, the airbag 121 is fixedly mounted on the top of the support plate 111, the detection frame 122 is fixedly mounted on the surface of the welding frame 1, the button 123 is fixedly mounted on the bottom of the inner wall of the detection frame 122, the detection tube 124 is fixedly mounted on the surface of the detection frame 122, the slide plate 125 is slidably mounted on the inner wall of the detection tube 124, the hollow plate 126 is fixedly mounted on the surface of the slide plate 125, a groove is opened on the surface of the button 123, the airbag 121 is connected to the inside of the detection tube 124 through a hose, ensuring that the bottom of the workpiece is fully supported before starting the welding gun 3 can reduce deformation or damage caused by loss of stable support of the workpiece, protect the workpiece and welding equipment, and improve the safety of the welding process.

[0036] The hollow plate 126 is in contact with the groove, a No. 3 spring is provided between the detection tube 124 and the slide plate 125, the button 123 is electrically connected to the welding gun 3, and the slide plate 125 can be driven to reset by the No. 3 spring.

[0037] The deceleration device includes a mounting frame 131, a control rod 132, an extrusion rod 133, a deceleration frame 134, a deceleration plate 135, a deceleration rod 136, a fixed rod 137 and a sealing plate 138. The mounting frame 131 is fixedly mounted on the surface of the welding frame 1, the control rod 132 rotates and penetrates the surface of the mounting frame 131, a gear is fixedly mounted on the surface of the control rod 132, the extrusion rod 133 is fixedly mounted on the surface of the control rod 132, the deceleration frame 134 is fixedly mounted on the surface of the welding frame 1, the deceleration plate 135 is slidably mounted on the inner wall of the deceleration frame 134, the deceleration rod 136 is fixedly mounted on the top of the deceleration plate 135, the fixed rod 137 is fixedly penetrated on the surface of the deceleration plate 135, the sealing plate 138 is slidably mounted on the surface of the fixed rod 137, a deceleration hole is opened on the surface of the deceleration plate 135, a sealing hole is opened on the surface of the sealing plate 138, and a handle is fixedly mounted on the surface of the control rod 132. Controlling the moving speed of the welding gun 3 can ensure that the welding material is fully melted and fused. Moving the welding gun 3 too fast may cause uneven welding and welding defects. These problems can be avoided by controlling the moving speed.

[0038] A No. 4 spring is arranged between the deceleration frame 134 and the deceleration plate 135, a No. 5 spring is arranged between the fixing rod 137 and the sealing plate 138, the gear is meshed with the annular rack 2, and the deceleration plate 135 can be driven to reset through the No. 4 spring.

[0039] When this embodiment is working: the U-shaped block 113 and the protection rod 114 move up and down, driving the support plate 111 to move; the movement of the support plate 111 drives the airbag 121 to move; the airbag 121 moves and contacts the bottom of the columnar workpiece, and is squeezed and deformed by the columnar workpiece; the deformation of the airbag 121 squeezes the gas inside itself; the gas inside the airbag 121 is squeezed by the airbag 121 and enters the detection cylinder 124 through the hose; the gas entering the detection cylinder 124 squeezes the slide plate 125; the slide plate 125 is pressurized by the gas entering the detection cylinder 124 and moves toward the direction close to the welding frame 1; the movement of the slide plate 125 drives the hollow plate 126 to move; the hollow plate 126 moves out of the limit of the groove to release the limit on the button 123.

[0040] After the hollow plate 126 releases the limit on the button 123, the button is manually pressed to drive the welding gun 3 to operate, and the handle is manually turned to rotate. The rotation of the handle drives the control rod 132 to rotate, and the rotation of the control rod 132 drives the gear to rotate. The rotation of the gear drives the annular rack 2 to rotate, and the rotation of the annular rack 2 drives the welding gun 3 to rotate to weld the two columnar workpieces. At the same time, the rotation of the control rod 132 drives the extrusion rod 133 to rotate, and the extrusion rod 133 rotates to contact the deceleration rod 136 to squeeze the deceleration rod 136 to move downward, and the deceleration rod 136 moves downward to drive the deceleration plate 135 to move downward, and the deceleration plate 135 moves downward to squeeze the gas inside the deceleration frame 134 to generate negative pressure. At the same time, the deceleration plate 135 moves downward to drive the fixing rod 137 and the sealing plate 138 to move downward, and the sealing plate 138 moves downward and is tightly pressed by the negative pressure of the gas inside the deceleration frame 134. The sealing plate 138 fits tightly to the bottom of the deceleration plate 135, so that the gas inside the deceleration frame 134 can only flow slowly through the sealing hole, the gas inside the deceleration frame 134 can only flow slowly through the sealing hole, so that the deceleration plate 135 can only move slowly, the deceleration plate 135 can only move slowly, so that the deceleration rod 136 moves slowly, and the deceleration rod 136 moves slowly so that the extrusion rod 133 and the control rod 132 can only rotate slowly. At the same time, when the deceleration plate 135 is reset under the elastic force of the fourth spring, the sealing plate 138 releases the seal of the deceleration hole under the pressure of the gas inside the deceleration frame 134, and after the seal of the deceleration hole is released, the gas inside the deceleration frame 134 can flow quickly through the deceleration hole, and the gas inside the deceleration frame 134 can flow quickly through the deceleration hole, so that the deceleration plate 135 can be reset quickly.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for welding metal parts, comprising a welding frame (1), characterized in that: It also includes a clamping device, a supporting device, a detection device and a deceleration device; Wherein, an annular rack (2) is rotatably mounted on the inner wall of the welding frame (1), a welding gun (3) is fixedly mounted on the inner wall of the annular rack (2), and a placement frame (4) is fixedly mounted on the surface of the welding frame (1); The clamping device comprises a placement rod (5), a placement plate (6), a rotating rod (7), a limiting plate (8), a limiting rod (9) and a rubber block (10); a placement hole is provided on the surface of the placement frame (4); the placement rod (5) is fixedly mounted on the inner wall of the placement hole; the placement plate (6) is slidably mounted on the surface of the placement rod (5); a protective hole is provided on the bottom of the inner wall of the placement frame (4); the rotating rod (7) is rotatably mounted on the inner wall of the protective hole; the limiting plate (8) is fixedly mounted on the surface of the rotating rod (7); the limiting rod (9) is fixedly mounted on the inner wall of the protective hole; and the rubber block (10) is fixedly mounted on the bottom of the placement plate (6); A spring is arranged between the rotating rod (7) and the protective hole, a No. 1 spring is arranged between the placing rod (5) and the placing plate (6), the limiting plate (8) is in contact with the limiting rod (9), and a non-Newtonian fluid is arranged inside the rubber block (10); The support device comprises a support plate (111), an adjustment rod (112), a U-shaped block (113), a protection rod (114) and a limiting groove (115); the support plate (111) is placed inside the placement rack (4); the adjustment rod (112) is slidably mounted on the bottom of the support plate (111); the U-shaped block (113) is fixedly mounted on the surface of the adjustment rod (112); the protection rod (114) is fixedly mounted on the top of the adjustment rod (112); and the limiting groove (115) is provided on the surface of the placement rack (4); A No. 2 spring is provided between the support plate (111) and the adjustment rod (112), the U-shaped block (113) is in contact with the limiting groove (115), and the protection rod (114) is in contact with the placement rack (4).

2. The device for metal parts welding according to claim 1, characterized in that: The detection device comprises an airbag (121), a detection frame (122), a button (123), a detection cylinder (124), a slide plate (125) and a hollow plate (126); the airbag (121) is fixedly mounted on the top of a support plate (111); the detection frame (122) is fixedly mounted on the surface of a welding frame (1); the button (123) is fixedly mounted on the bottom of an inner wall of the detection frame (122); the detection cylinder (124) is fixedly mounted on the surface of the detection frame (122); the slide plate (125) is slidably mounted on the inner wall of the detection cylinder (124); the hollow plate (126) is fixedly mounted on the surface of the slide plate (125); a groove is provided on the surface of the button (123); and the airbag (121) is connected to the inside of the detection cylinder (124) via a hose.

3. The device for metal parts welding according to claim 2, characterized in that: The hollow plate (126) is in contact with the groove, a No. 3 spring is provided between the detection cylinder (124) and the slide plate (125), and the button (123) is electrically connected to the welding gun (3).

4. The device for metal parts welding according to claim 3, characterized in that: The deceleration device comprises a mounting frame (131), a control rod (132), an extrusion rod (133), a deceleration frame (134), a deceleration plate (135), a deceleration rod (136), a fixing rod (137) and a sealing plate (138); the mounting frame (131) is fixedly mounted on the surface of the welding frame (1); the control rod (132) rotates and penetrates the surface of the mounting frame (131); a gear is fixedly mounted on the surface of the control rod (132); the extrusion rod (133) is fixedly mounted on the surface of the control rod (132); the deceleration frame (134) is fixedly mounted on the surface of the welding frame (1), the deceleration plate (135) is slidably mounted on the inner wall of the deceleration frame (134), the deceleration rod (136) is fixedly mounted on the top of the deceleration plate (135), the fixed rod (137) is fixedly penetrated through the surface of the deceleration plate (135), the sealing plate (138) is slidably mounted on the surface of the fixed rod (137), a deceleration hole is opened on the surface of the deceleration plate (135), a sealing hole is opened on the surface of the sealing plate (138), and a handle is fixedly mounted on the surface of the control rod (132).

5. The device for metal parts welding according to claim 4, characterized in that: A No. 4 spring is provided between the deceleration frame (134) and the deceleration plate (135), a No. 5 spring is provided between the fixing rod (137) and the sealing plate (138), and the gear is meshed with the annular rack (2).

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