Metal piece welding device for bank table and chair production

Abstract

The invention relates to the technical field of metal welding, and discloses a metal part welding device for bank table and chair production, which comprises a bottom plate and further comprises a fixing plate arranged on the outer wall of a supporting mechanism; the driving mechanism provides basic supporting force; the outer wall of the welding mechanism is fixedly connected to the outer wall of the driving mechanism; a large support is fixedly connected to the outer wall of the bottom plate, a fixing cylinder is fixedly connected to the outer wall of the large support, a backrest metal piece is connected to the outer wall of the fixing cylinder in an attached mode, the two metal pieces are preliminarily welded, meanwhile, certain supporting force is formed, and at the moment, the rotating force drives a welding gun to conduct rotary welding with the transverse rod metal piece as the center. The connecting position of the first gear and the backrest metal piece is welded in an all-around mode, and the problems that after the metal piece is fixed through traditional spot welding, due to the fact that the upper portion and the lower portion are shielded, a traditional metal welding device cannot weld the workpiece in an all-around mode, welding is not stable, and insufficient welding is likely to happen or the welding face cannot reach the needed strength are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal welding, and particularly relates to a metal part welding device for the production of bank desks and chairs. Background Art

[0002] With the acceleration of the urbanization process, people's living standards have been greatly improved. To meet people's living needs, various processing and manufacturing industries have started to develop rapidly. Among them, desks and chairs are essential items in people's daily lives and are needed in both residential and office places such as banks and medical institutions. Desks and chairs are often composed of metal parts welded together.

[0003] When welding the backrests of desks and chairs, a metal part welding device is often used. However, due to the metal parts blocking both above and below the chair backrest, it is difficult for the metal welding device to perform all-round welding on the workpiece, resulting in unstable welding, prone to false welding or the welding surface not reaching the required strength, and the operation is cumbersome, with poor positioning accuracy, and the welding quality cannot be guaranteed. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a metal part welding device for the production of bank desks and chairs, including a bottom plate, and further including: A support mechanism, with a fixing plate provided on the outer wall of the support mechanism; A driving mechanism, which provides a basic supporting force; A welding mechanism, the outer wall of which is fixedly connected to the outer wall of the driving mechanism; A large bracket is fixedly connected to the outer wall of the bottom plate, a fixed cylinder is fixedly connected to the outer wall of the large bracket, and a backrest metal part is fitted and connected to the outer wall of the fixed cylinder.

[0005] Preferably, the support mechanism includes: A bottom plate assembly, which is fixedly connected to the outer wall of the support mechanism; A motion assembly, which is fixedly connected to the outer wall of the bottom plate assembly.

[0006] Preferably, the driving mechanism includes: A connection assembly, which is fixedly connected to the outer wall of the motion assembly; A rotation assembly, which is fixedly connected to the outer wall of the connection assembly.

[0007] Preferably, the welding mechanism includes: A shaking assembly, which is rotatably connected to the outer wall of the rotation assembly; A fixing assembly, which is rotatably connected to the outer wall of the rotation assembly.

[0008] Preferably, the bottom plate assembly includes a bracket fixedly connected to the outer wall of the bottom plate, and a support plate is fixedly connected to the outer wall of the bottom plate.

[0009] Preferably, the moving component includes an electric telescopic rod fixedly connected to the outer wall of the support plate, and a crossbar metal piece is fitted and connected to the outer wall of the backrest metal piece.

[0010] Preferably, the connecting component includes a housing fixedly connected to the end of the electric telescopic rod away from the support plate. A gear is rotatably connected to the inner wall of the housing, and a servo motor is fixedly connected to the inner wall of the housing. The outer wall of the servo motor is fixedly connected to the outer wall of the gear. A first gear is rotatably connected to the inner wall of the housing, and the outer wall of the first gear is meshed with the outer wall of the gear. Before use, connect the power supply to make the machine in a normal working state. Push the backrest metal piece into the fixed cylinder so that the metal block at the backrest installation position of the backrest metal piece is inserted into the reserved card slot of the bracket, so that the backrest metal piece is relatively fixed on the equipment. The crossbar metal piece can be placed by combining with other machines or manually. When the equipment is started, the driving mechanism will drive the connecting component to move forward, thereby pushing the crossbar metal piece to the welding position. The servo motor drives the gear to apply rotational power to the first gear, so that the first gear drives the rotating cylinder to rotate. At this time, the welding torches fixed at the upper and lower ends of the welding mechanism will spot-weld the connection between the crossbar metal piece and the backrest metal piece, so that the two metal pieces are preliminarily welded and form a certain supporting force. At this time, the rotating force drives the welding torch to rotate and weld around the crossbar metal piece, so that the connection between the first gear and the backrest metal piece is welded in all directions, avoiding the problem that after the traditional spot welding fixes the metal piece, due to the upper and lower obstructions, the traditional metal welding device cannot weld the workpiece in all directions, resulting in unstable welding, easy occurrence of virtual welding or the welding surface not reaching the required strength.

[0011] Preferably, the rotating component includes a rotating cylinder fixedly connected to the inner wall of the first gear. A groove is provided on the inner wall of the rotating cylinder. A moving plate is rotatably connected to the inner wall of the rotating cylinder, and the outer wall of the moving plate is meshed with the groove. A limiting plate is fixedly connected to the top of the moving plate. Using the characteristics of the above-mentioned rotating force, when the rotating force drives the welding mechanism to rotate, there are convex points of different sizes on the shielding plate fixing the welding torch, and the largest convex point is at the rear end of the welding torch. When the rotating cylinder rotates and the welding torch welds the backrest metal piece, the convex points will move upward under the drive of the spring because there is no shielding of the backrest metal piece at the top, causing the welding range of the welding torch to shift, increasing the welding area on the side of the backrest metal piece and the crossbar metal piece. When the convex points of different sizes come into contact with the outer surface of the backrest metal piece subsequently, the spring will contract or release, causing the welding torch to present an up-and-down shaking welding form when welding the outer walls of the backrest metal piece and the crossbar metal piece. Because the outer surface of the crossbar metal piece and the backrest metal piece has a larger welding area than the included angle surface of the crossbar metal piece and the backrest metal piece, the characteristics of the above convex points make the welding area wider when welding the crossbar metal piece and the backrest metal piece, avoiding virtual welding or insecure welding on the outer surface during welding.

[0012] Preferably, the shaking component includes a plurality of springs fixedly connected to the upper and lower ends of the rotating cylinder. One end of the spring away from the outer shell is fixedly connected with a shielding plate. A plurality of bumps are fixedly connected to the outer wall of the shielding plate. A welding torch is connected through the inner wall of the shielding plate. By using the characteristics of the bumps, when rotating, bumps of different sizes cooperate with the springs to make the welding torch perform up and down welding. The bumps arranged at the rear end of the welding torch will, when rotating and welding, hold against the outer wall of the backrest metal part, causing the relative position of the shielding plate to drop. When the welding torch shakes up and down under the drive of multiple bumps, it can avoid hitting the bodies of the backrest metal part and the crossbar metal part, and avoid the situation that when the welding torch hits the metal part, excessive heat is generated at the welding position of the metal part, resulting in partial melting and loss of the metal part, or thermal damage to the welding torch.

[0013] Preferably, the fixing component includes a fixing frame fixedly connected to the outer wall of the moving plate. A plurality of first springs are fixedly connected to the inner wall of the fixing frame. One end of the plurality of first springs away from the fixing frame is fixedly connected with a pressing plate. Before working, the electric telescopic rod will drive the driving mechanism to move forward and backward. Most of the circular components on the driving mechanism are in a notched state, such as gear one. When gear one rotates driven by a gear, there is a notch. When gear 213 rotates to drive gear one 214 to rotate, when gear 213 rotates to the notch reserved by gear one 214, a tooth of gear 213 meshes with gear one 214 to provide a rotational force. When the crossbar metal part 124 blocks the middle position of the driving mechanism 2, the fixing component 32 will fix it. The pressing plate will fix the crossbar metal part therein. When welding, spot welding is first performed on the crossbar metal part to provide a support point. When the rotating cylinder rotates, due to the effect of spot welding, the crossbar metal part has a support point. At this time, due to the setting of the fixing component, the moving plate will be fixed centered on the crossbar metal part and will not move. When the rotating cylinder rotates, the groove provided on the moving plate and the rotating cylinder are in meshing rotational connection, ensuring that the components of the fixing component will not rotate, avoiding the fixing component from rotating and driving the crossbar metal part to rotate, which affects the welding effect. At the same time, when welding is completed, a reset rotation will be performed to avoid entanglement of the pipeline connected to the welding torch. When welding is completed, under the drive of the electric telescopic rod, the welding mechanism will move backward to facilitate the removal of the metal part completed by the welding torch and the placement of the metal part to be welded subsequently. When moving backward, the completed metal part will cause the pressing plate to move backward and compress the first spring to contract, facilitating the removal of the crossbar metal part and avoiding difficult clamping and removal.

[0014] The present invention has the following beneficial effects: (1) The present invention aims to solve the problem that traditional welding cannot weld in all directions. Gear 1 drives the rotating cylinder to rotate. At this time, the welding guns fixed at the upper and lower ends of the welding mechanism will spot weld the connection between the crossbar metal part and the backrest metal part, so that the two metal parts are initially welded and a certain supporting force is formed at the same time. At this time, the rotating force drives the welding gun to rotate and weld with the crossbar metal part as the center, so that the connection between gear 1 and the backrest metal part is welded in all directions, avoiding the problem that after the traditional spot welding fixes the metal parts, the traditional metal welding device cannot weld the workpiece in all directions due to the obstruction on the upper and lower sides, resulting in unstable welding, easy to cause false welding or the welding surface does not reach the required strength.

[0015] (2) The present invention utilizes the characteristics of the above-mentioned rotational force. When the rotational force drives the welding mechanism to rotate, protrusions of different sizes are set on the shielding plate of the fixed welding gun, and the largest protrusion is at the rear end of the welding gun. When the rotating cylinder rotates, the protrusions will move upward under the drive of the spring when the welding gun welds the backrest metal part because the top is no longer blocked by the backrest metal part, causing the welding range of the welding gun to shift, thereby increasing the welding area of ​​the backrest metal part and the side of the crossbar metal part. When the subsequent protrusions of different sizes contact the outer surface of the backrest metal part, the spring will be contracted or released, causing the welding gun to present an up and down shaking welding form when welding the outer wall of the backrest metal part and the crossbar metal part. Because the outer surface of the crossbar metal part and the backrest metal part is larger than the welding area of ​​the angle surface between the crossbar metal part and the backrest metal part, the characteristics of the above-mentioned protrusions make the welding area wider when welding the crossbar metal part and the backrest metal part, thereby avoiding the occurrence of cold welding or loose welding on the outer surface during welding.

[0016] (3) The present invention utilizes the characteristics of the protrusions. When rotating, the protrusions of different sizes cooperate with the spring to enable the welding gun to weld up and down. The protrusions set at the rear end of the welding gun will support the outer wall of the backrest metal part when rotating welding, and the relative position of the baffle plate will drop. This prevents the welding gun from shaking up and down due to the drive of multiple protrusions during welding, and collides with the body of the backrest metal part and the crossbar metal part. It also prevents the welding gun from colliding with the metal part, resulting in excessive heat at the welding position of the metal part, causing partial melting and loss of the metal part, or thermal damage to the welding gun.

[0017] (4) When the crossbar metal part is blocked at the middle position of the driving mechanism, the fixing component will fix it, and the pressing plate will fix the crossbar metal part therein. When welding, the crossbar metal part is first spot-welded to provide a support point. When the rotating cylinder rotates, due to the effect of spot welding, the crossbar metal part has a support point. At this time, due to the setting of the fixing component, the moving plate will be fixed centered on the crossbar metal part and will not move. When the rotating cylinder rotates, the moving plate and the groove provided on the rotating cylinder are in meshing rotational connection, keeping the components of the fixing component from rotating, avoiding rotation after the fixing component, and thus driving the crossbar metal part to rotate, which affects the welding effect. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 Schematic cross-sectional view of the overall structure of the present invention; Figure 2 Schematic diagram of the overall structure of the present invention; Figure 3 Schematic diagram of the driving mechanism part of the present invention; Figure 4 Schematic cross-sectional view of the overall structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic view of A in the present invention; Figure 6 Schematic diagram of the metal part of the present invention; Figure 7 Schematic diagram of the bracket structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged schematic view of B in the present invention; Figure 9 For the present invention Figure 7 Enlarged schematic view of C in the present invention; Figure 10 Schematic diagram of the gear structure of the present invention.

[0020] In the drawings, the list of components represented by each reference numeral is as follows: In the figure: 1. Support mechanism; 11. Bottom plate assembly; 12. Movement assembly; 111. Bottom plate; 112. Bracket; 113. Large bracket; 114. Support plate; 121. Fixed cylinder; 122. Electric telescopic rod; 123. Backrest metal part; 124. Crossbar metal part; 2. Driving mechanism; 21. Connection assembly; 22. Rotating assembly; 211. Housing; 212. Servo motor; 213. Gear; 214. Gear 1; 221. Rotating cylinder; 222. Moving plate; 223. Limiting plate; 224. Groove; 3. Welding mechanism; 31. Shaking assembly; 32. Fixing assembly; 311. Spring; 312. Shielding plate; 313. Welding torch; 314. Convex point; 322. Fixed frame; 323. Spring 1; 324. Extrusion plate. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Example 1, please refer to Figure 1 - Figure 5 , the present invention is a metal part welding device for bank desks and chairs production, including a bottom plate 111, and further including: Support mechanism 1, with a fixing plate arranged on the outer wall of the support mechanism 1; Driving mechanism 2, which provides basic supporting force; Welding mechanism 3, the outer wall of the welding mechanism 3 is fixedly connected to the outer wall of the driving mechanism 2; The outer wall of the bottom plate 111 is fixedly connected with a large bracket 113, the outer wall of the large bracket 113 is fixedly connected with a fixed cylinder 121, and the outer wall of the fixed cylinder 121 is in fitting connection with a backrest metal part 123.

[0023] The support mechanism 1 includes: Bottom plate assembly 11, the bottom plate assembly 11 is fixedly connected to the outer wall of the support mechanism 1; Movement assembly 12, the movement assembly 12 is fixedly connected to the outer wall of the bottom plate assembly 11.

[0024] The driving mechanism 2 includes: Connection assembly 21, the connection assembly 21 is fixedly connected to the outer wall of the movement assembly 12; Rotating assembly 22, the rotating assembly 22 is fixedly connected to the outer wall of the connection assembly 21.

[0025] The welding mechanism 3 includes: The shaking component 31 is rotatably connected to the outer wall of the rotating component 22; The fixing component 32 is rotatably connected to the outer wall of the rotating component 22.

[0026] The bottom plate component 11 includes a bracket 112 fixedly connected to the outer wall of the bottom plate 111, and a support plate 114 is fixedly connected to the outer wall of the bottom plate 111.

[0027] The motion component 12 includes an electric telescopic rod 122 fixedly connected to the outer wall of the support plate 114, and a crossbar metal part 124 is attached to the outer wall of the backrest metal part 123.

[0028] The connection component 21 includes a housing 211 fixedly connected to one end of the electric telescopic rod 122 away from the support plate 114. A gear 213 is rotatably connected to the inner wall of the housing 211. A servo motor 212 is fixedly connected to the inner wall of the housing 211. The outer wall of the servo motor 212 is fixedly connected to the outer wall of the gear 213. A gear 214 is rotatably connected to the inner wall of the housing 211. The outer wall of the gear 214 is meshed with the outer wall of the gear 213. Before use, connect the power supply to make the machine in a normal working state. Push the backrest metal part 123 into the fixed cylinder 121, so that the metal block at the place where the backrest metal part 123 is installed is stuck into the reserved card slot of the bracket 112, so that the backrest metal part 123 is relatively fixed on the device. The crossbar metal part 124 can be placed by combining with other machines or manually. When the device is started, the driving mechanism 2 will drive the connection component 21 to move forward, thereby pushing the crossbar metal part 124 to the welding position. The servo motor 212 drives the gear 213 to apply rotational power to the gear 214, so that the gear 214 drives the rotating cylinder 221 to rotate. At this time, the welding torches 313 fixed at the upper and lower ends of the welding mechanism 3 will spot-weld the connection between the crossbar metal part 124 and the backrest metal part 123, so that the two metal parts are preliminarily welded and form a certain supporting force. At this time, the rotating force drives the welding torch 313 to rotate and weld around the crossbar metal part 124, so that the connection between the gear 214 and the backrest metal part 123 is welded in all directions, avoiding the problem that the traditional metal welding device cannot weld the workpiece in all directions due to the upper and lower shielding after the traditional spot welding fixes the metal parts, resulting in unstable welding, easy occurrence of virtual welding or the welding surface not reaching the required strength.

[0029] Example two, please refer to Figure 5 - Figure 10, the present invention is a metal part welding device for bank desks and chairs. On the basis of Example 1, the rotating assembly 22 includes a rotating cylinder 221 fixedly connected to the inner wall of the first gear 214. A groove 224 is provided on the inner wall of the rotating cylinder 221. A moving plate 222 is rotatably connected to the inner wall of the rotating cylinder 221. The outer wall of the moving plate 222 is meshed with the groove 224. A limiting plate 223 is fixedly connected to the top of the moving plate 222. Utilizing the characteristics of the above-mentioned rotational force, when the rotational force drives the welding mechanism 3 to rotate, there are convex points 314 of different sizes on the shielding plate 312 that fixes the welding torch 313. The largest convex point 314 is at the rear end of the welding torch 313. When the rotating cylinder 221 rotates and the welding torch 313 welds the backrest metal part 123, the convex point 314 will move upward under the drive of the spring 311 because there is no shielding of the backrest metal part 123 at the top, causing the welding range of the welding torch 313 to shift, increasing the welding area between the backrest metal part 123 and the side of the crossbar metal part 124. When the subsequent convex points 314 of different sizes come into contact with the outer surface of the backrest metal part 123, the spring 311 will contract or release, causing the welding torch 313 to present an up-and-down shaking welding form when welding the outer walls of the backrest metal part 123 and the crossbar metal part 124. Because the outer surfaces of the crossbar metal part 124 and the backrest metal part 123 have a larger welding area compared to the included angle surface between the crossbar metal part 124 and the backrest metal part 123, through the characteristics of the above convex points 314, the welding area becomes wider when welding the crossbar metal part 124 and the backrest metal part 123, avoiding the occurrence of virtual welding or insecure welding on the outer surface during welding.

[0030] The shaking assembly 31 includes a plurality of springs 311 fixedly connected to the upper and lower ends of the rotating cylinder 221. One end of the spring 311 away from the housing 211 is fixedly connected to a shielding plate 312. A plurality of convex points 314 are fixedly connected to the outer wall of the shielding plate 312. A welding torch 313 is penetratingly connected to the inner wall of the shielding plate 312. Utilizing the characteristics of the convex points 314, when rotating, the convex points 314 of different sizes cooperate with the springs 311 to make the welding torch 313 perform up-and-down welding. The convex point 314 provided at the rear end of the welding torch 313, during rotary welding, when the convex point 314 abuts against the outer wall of the backrest metal part 123, the relative position of the shielding plate 312 drops, avoiding the welding torch 313 colliding with the bodies of the backrest metal part 123 and the crossbar metal part 124 when the welding torch 313 shakes up and down driven by multiple convex points 314, and avoiding excessive heat at the welding position of the metal part when the welding torch 313 collides with the metal part, resulting in partial melting and loss of the metal part, or thermal damage to the welding torch 313.

[0031] The fixing component 32 includes a fixing frame 322 fixedly connected to the outer wall of the moving plate 222. A plurality of first springs 323 are fixedly connected to the inner wall of the fixing frame 322. One end of the plurality of first springs 323 away from the fixing frame 322 is fixedly connected to a pressing plate 324. Before work, the electric telescopic rod 122 will drive the driving mechanism 2 to move forward and backward. Most of the circular components on the driving mechanism 2 are in a notched state. For example, for the first gear 214, when the first gear 214 is driven to rotate by the gear 213, since the first gear 214 has a notch, when the gear 213 rotates to drive the first gear 214 to rotate, when the gear 213 rotates to the notch reserved by the first gear 214, a tooth of the corresponding gear 213 is meshed and connected to the first gear 214 to provide a rotational force. When the crossbar metal part 124 blocks the middle position of the driving mechanism 2, the fixing component 32 will fix it, and the pressing plate 324 will fix the crossbar metal part 124 therein. When welding, the crossbar metal part 124 is first spot-welded to provide a support point. When the rotating cylinder 221 rotates, due to the effect of spot welding, the crossbar metal part 124 has a support point. At this time, due to the setting of the fixing component 32, the moving plate 222 will be fixed centered on the crossbar metal part 124 and will not move. When the rotating cylinder 221 rotates, the moving plate 222 and the groove 224 provided on the rotating cylinder 221 are in meshing rotational connection, keeping the components of the fixing component 32 from rotating, avoiding rotation after the fixing component 32 is fixed, thereby driving the crossbar metal part 124 to rotate and affecting the welding effect. At the same time, when the welding is completed, a reset rotation will be performed to avoid entanglement of the pipeline connected to the welding torch 313. When the welding is completed, under the drive of the electric telescopic rod 122, the welding mechanism 3 will move backward to facilitate taking out the metal part completed by the welding torch 313 and placing the metal part to be welded subsequently. When moving backward, the completed metal part of the welding will cause the pressing plate 324 to move backward, squeezing the first springs 323 to contract, facilitating taking out the crossbar metal part 124 and avoiding difficult clamping and taking out.

[0032] A specific application of this embodiment is as follows: Before use, connect the power supply to make the machine in a normal working state. Push the backrest metal part 123 into the fixed cylinder 121, so that the metal block at the place where the backrest metal part 123 is installed against the backrest is snapped into the reserved card slot of the bracket 112, making the backrest metal part 123 relatively fixed on the device. The crossbar metal part 124 can be placed by combining with other machines or manually. When the device is started, the driving mechanism 2 will drive the connecting component 21 to move forward, thereby pushing the crossbar metal part 124 to the welding position. The servo motor 212 drives the gear 213 to apply rotational power to the first gear 214, so that the first gear 214 drives the rotating cylinder 221 to rotate. At this time, the welding torches 313 fixed at the upper and lower ends of the welding mechanism 3 will spot-weld the connection between the crossbar metal part 124 and the backrest metal part 123, making the two metal parts be preliminarily welded and forming a certain supporting force at the same time. Then the rotating force drives the welding torch 313 to rotate and weld with the crossbar metal part 124 as the center, so that the connection between the first gear 214 and the backrest metal part 123 is welded in all directions, avoiding the problem that the traditional metal welding device cannot weld the workpiece in all directions due to the upper and lower obstructions after the traditional spot welding fixes the metal parts, resulting in unstable welding, easy occurrence of virtual welding or the welding surface not reaching the required strength.

[0033] Utilizing the characteristics of the above-mentioned rotating force, when the rotating force drives the welding mechanism 3 to rotate, there are convex points 314 of different sizes on the shielding plate 312 that fixes the welding torch 313. The largest convex point 314 is at the rear end of the welding torch 313. When the rotating cylinder 221 rotates and the welding torch 313 welds the backrest metal part 123, the convex point 314 will move upward under the drive of the spring 311 because there is no longer the shielding of the backrest metal part 123 at the top, causing the welding range of the welding torch 313 to shift, increasing the welding area on the side between the backrest metal part 123 and the crossbar metal part 124. When the subsequent convex points 314 of different sizes contact the outer surface of the backrest metal part 123, the spring 311 will contract or release, making the welding torch 313 present an up-and-down shaking welding form when welding the outer walls of the backrest metal part 123 and the crossbar metal part 124. Because the outer surfaces of the crossbar metal part 124 and the backrest metal part 123 have a larger welding area compared to the included angle surface between the crossbar metal part 124 and the backrest metal part 123, through the characteristics of the above convex points 314, the welding area becomes wider when welding the crossbar metal part 124 and the backrest metal part 123, avoiding virtual welding or insecure welding on the outer surface during welding.

[0034] Utilizing the characteristics of the convex points 314, when rotating, the convex points 314 of different sizes cooperate with the spring 311 to make the welding torch 313 perform up-and-down welding. The convex points 314 arranged at the rear end of the welding torch 313, during rotational welding, when the convex points 314 press against the outer wall of the backrest metal part 123, the relative position of the baffle 312 drops. This avoids the welding torch 313 shaking up and down during welding driven by multiple convex points 314 and colliding with the bodies of the backrest metal part 123 and the crossbar metal part 124. It also avoids the situation where when the welding torch 313 collides with the metal part, excessive heat is generated at the welding position of the metal part, causing partial melting and loss of the metal part, or thermal damage to the welding torch 313.

[0035] Before work, the electric telescopic rod 122 will drive the driving mechanism 2 to move forward and backward. Most of the circular components on the driving mechanism 2 are set in a notched state, such as the first gear 214. When the first gear 214 is driven to rotate by the gear 213, there is a notch. When the gear 213 rotates to drive the first gear 214 to rotate, when the gear 213 rotates to the notch reserved by the first gear 214, a tooth of the corresponding gear 213 meshes with the first gear 214 to provide a rotational force. When the crossbar metal part 124 blocks the middle position of the driving mechanism 2, the fixing component 32 will fix it. The pressing plate 324 will fix the crossbar metal part 124 therein. When welding, first perform spot welding on the crossbar metal part 124 to provide a support point. When the rotating cylinder 221 rotates, due to the effect of spot welding, the crossbar metal part 124 has a support point. At this time, due to the setting of the fixing component 32, the moving plate 222 will be fixed centered on the crossbar metal part 124 and will not move. When the rotating cylinder 221 rotates, the moving plate 222 and the groove 224 provided on the rotating cylinder 221 are in a meshing rotational connection, keeping the components of the fixing component 32 from rotating, avoiding rotation after the fixing component 32 is fixed, and thus driving the crossbar metal part 124 to rotate, which affects the welding effect.

[0036] At the same time, when welding is completed, a reset rotation will be performed to avoid entanglement of the pipeline connected to the welding torch 313. When welding is completed, driven by the electric telescopic rod 122, the welding mechanism 3 will move backward to facilitate the removal of the metal part completed by the welding torch 313 and the placement of the metal part to be welded subsequently. When moving backward, the completed metal part will cause the pressing plate 324 to move backward, squeezing the first spring 323 to contract, facilitating the removal of the crossbar metal part 124 and avoiding difficult clamping and removal.

[0037] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A metal part welding device for bank desks and chairs production, including a bottom plate (111), characterized in that, Further included are: A support mechanism (1), on the outer wall of which a fixing plate is provided; A driving mechanism (2), which provides a basic supporting force; A welding mechanism (3), the outer wall of which is fixedly connected to the outer wall of the driving mechanism (2); On the outer wall of the bottom plate (111), a large bracket (113) is fixedly connected, on the outer wall of the large bracket (113), a fixing cylinder (121) is fixedly connected, and on the outer wall of the fixing cylinder (121), a backrest metal part (123) is fitted and connected.

2. The metal part welding device for bank desks and chairs production according to claim 1, characterized in that: The support mechanism (1) includes: A bottom plate assembly (11), which is fixedly connected to the outer wall of the support mechanism (1); A motion assembly (12), which is fixedly connected to the outer wall of the bottom plate assembly (11).

3. A metal part welding device for bank desks and chairs production according to claim 2, characterized in that: The driving mechanism (2) includes: A connection assembly (21), which is fixedly connected to the outer wall of the motion assembly (12); A rotation assembly (22), which is fixedly connected to the outer wall of the connection assembly (21).

4. A metal part welding device for bank desks and chairs production according to claim 3, characterized in that: The welding mechanism (3) includes: A shaking assembly (31), which is rotatably connected to the outer wall of the rotation assembly (22); A fixing assembly (32), which is rotatably connected to the outer wall of the rotation assembly (22).

5. The metal part welding device for bank desks and chairs production according to claim 4, characterized in that: The bottom plate assembly (11) includes a bracket (112) fixedly connected to the outer wall of the bottom plate (111), and a support plate (114) is fixedly connected to the outer wall of the bottom plate (111).

6. The metal part welding device for bank desks and chairs production according to claim 5, characterized in that: The motion assembly (12) includes an electric telescopic rod (122) fixedly connected to the outer wall of the support plate (114), and a crossbar metal part (124) is fitted and connected to the outer wall of the backrest metal part (123).

7. A metal part welding device for bank desks and chairs production according to claim 6, characterized in that: The connection assembly (21) includes a housing (211) fixedly connected to the end of the electric telescopic rod (122) away from the support plate (114), a gear (213) is rotatably connected to the inner wall of the housing (211), a servo motor (212) is fixedly connected to the inner wall of the housing (211), the outer wall of the servo motor (212) is fixedly connected to the outer wall of the gear (213), a gear one (214) is rotatably connected to the inner wall of the housing (211), and the outer wall of the gear one (214) is meshed and connected to the outer wall of the gear (213).

8. A metal part welding device for bank desks and chairs production according to claim 7, characterized in that: The rotation assembly (22) includes a rotating cylinder (221) fixedly connected to the inner wall of the gear one (214), a groove (224) is provided on the inner wall of the rotating cylinder (221), a moving plate (222) is rotatably connected to the inner wall of the rotating cylinder (221), the outer wall of the moving plate (222) is meshed with the groove (224), and a limiting plate (223) is fixedly connected to the top of the moving plate (222).

9. The metal part welding device for bank desks and chairs production according to claim 8, characterized in that: The shaking component (31) includes a plurality of springs (311) fixedly connected to the upper and lower ends of the rotating cylinder (221). One end of the spring (311) away from the outer shell (211) is fixedly connected with a shielding plate (312). A plurality of bumps (314) are fixedly connected to the outer wall of the shielding plate (312). A welding torch (313) is connected through the inner wall of the shielding plate (312).

10. A metal part welding device for bank desks and chairs production according to claim 9, characterized in that: The fixing component (32) includes a fixing frame (322) fixedly connected to the outer wall of the moving plate (222). A plurality of first springs (323) are fixedly connected to the inner wall of the fixing frame (322). One end of the plurality of first springs (323) away from the fixing frame (322) is fixedly connected with a pressing plate (324).

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