A welding device for metal parts

Abstract

The present invention relates to the technical field of welding equipment, and specifically to a welding equipment for metal parts, comprising: a machine table, a U-shaped plate, a metal pipe fitting, a fixing mechanism for fixing the metal pipe fitting before welding, and a welding mechanism for welding the metal pipe fitting after fixing; the fixing mechanism comprises: a clamping assembly for clamping and fixing the metal pipe fitting, a docking assembly for docking the metal pipe fitting after clamping, and a rotating assembly for driving the metal pipe fitting for rotational welding after docking. In the present invention, through the setting of the fixing mechanism, the purpose of clamping and fixing the outer side and the inner wall of the metal pipe fitting at the same time is achieved, the stability of the clamping is improved, the fixing effect is improved, and the two metal pipe fittings are realized to rotate synchronously during the welding process, so as to prevent the phenomenon that the quality of the weld is affected by the asynchronous rotation of the two metal pipe fittings, thereby improving the welding quality of the metal pipe fittings.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to welding equipment for metal parts. Background Art

[0002] Laser welding uses high-energy laser pulses to locally heat a small area of ​​the material. The energy of the laser radiation diffuses into the interior of the material through heat conduction, melting the material to form a specific molten pool. It is a new type of welding method that can achieve spot welding, butt welding, lap welding, sealing welding, etc. It has a high aspect ratio, a small weld width, a small heat-affected zone, small deformation, fast welding speed, smooth and beautiful welds, no post-welding treatment or only simple treatment, high weld quality, no pores, can be precisely controlled, small focus spot, high positioning accuracy, and easy automation.

[0003] A Chinese patent with application number CN202311459240.3 discloses a pipe laser welding machine, comprising: a machine body, a work surface is provided on the surface of the machine body; a laser welding mechanism, the laser welding mechanism is arranged on the work surface, and the laser welding mechanism includes a laser welding head that can be raised and lowered; and also includes: a pipe clamping mechanism, the pipe clamping mechanism is arranged on the machine body, and the pipe clamping mechanism includes two pipe clamping members symmetrically arranged on both sides of the laser welding head; wherein the two pipe clamping members can be synchronously rotated through a synchronous driving member to drive the two sections of the pipe to rotate simultaneously. Compared with the prior art, the present invention can prevent the phenomenon that the weld quality is affected by the asynchronous rotation of the two sections of the pipe, thereby improving the welding quality of the pipe.

[0004] However, this patent only clamps and fixes the outer wall of the pipe, but fails to clamp and fix the inner wall of the pipe. When the pipe is rotated and welded, it is easy to cause poor stability of the pipe, affecting the welding quality of the pipe.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0006] The object of the present invention is to provide a welding device for metal parts which can effectively solve the above-mentioned technical problems.

[0007] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0008] A welding device for metal parts, comprising: a machine platform, a U-shaped plate, a metal pipe, a fixing mechanism for fixing the metal pipe before welding, and a welding mechanism for welding the metal pipe after fixing;

[0009] The fixing mechanism comprises: a clamping assembly for clamping and fixing the metal pipe fitting, a docking assembly for docking the metal pipe fitting after clamping, and a rotating assembly for driving the metal pipe fitting for rotational welding after docking;

[0010] The clamping assembly includes: an installation box symmetrically arranged on the top of the machine, an outer clamping plate for clamping and fixing the outer side of the metal pipe, an inner clamping plate for clamping and fixing the inner wall of the metal pipe, and a driving unit for driving the outer clamping plate and the inner clamping plate to move;

[0011] The docking assembly includes: a linkage plate movably mounted in the inner cavity of the U-shaped plate, a power source for driving the linkage plate to move up and down, a limiting member for limiting the linkage plate during movement, a mounting plate for mounting the clamping assembly, a movable bar hingedly mounted between the bottom of the linkage plate and the side wall of the mounting plate, and a guide unit for guiding the mounting plate;

[0012] The rotating assembly includes: a rotating rod rotatably installed on the side wall of the mounting plate, a power source for driving the rotating rod to rotate, a sleeve mounted on the outer edge of the rotating rod, a transmission gear fixedly mounted on the outer edges of the rotating rod and the sleeve respectively, a linkage gear ring fixedly mounted on the outer edge of the mounting box and meshing with the transmission gear, a slide groove provided on the inner wall of the sleeve, and a slide bar fixedly mounted on the outer edge of the rotating rod and sliding in the inner cavity of the slide groove.

[0013] Furthermore, the driving unit includes: a driving gear rotatably installed on the inner wall of the installation box, a power source for driving the driving gear to rotate, a rotating shaft rotatably installed on the inner wall of the installation box, a driven gear and a connecting gear fixedly sleeved on the outer edge of the rotating shaft, a connecting rack meshing with the connecting gear, a connecting rod fixedly installed on the side wall of the connecting rack, and a limit rod for limiting and guiding the connecting rod during movement.

[0014] Furthermore, a limit opening is provided on the side wall of the installation box, the outer edge of the connecting rod passes through the inner cavity of the limit opening, the limit rod is installed on the side wall of the connecting rod, and both ends of the limit rod are fixedly installed on the inner wall of the limit opening.

[0015] Furthermore, the limiting member includes: a limiting groove provided on the side wall of the U-shaped plate, and a limiting bar fixedly mounted on the side wall of the linkage plate and sliding in the inner cavity of the limiting groove.

[0016] Furthermore, the guide unit includes: a movable seat symmetrically arranged in the inner cavity of the machine, a guide rod for limiting and guiding the movable seat during movement, and a reset spring for driving the movable seat to reset.

[0017] Furthermore, the welding mechanism includes: a laser welding head for welding the metal pipe, a cooling component for cooling the welded portion of the metal pipe after welding, and a maintenance component for maintaining the welded portion of the metal pipe after cooling.

[0018] Furthermore, the cooling assembly includes: a nozzle for spraying air to the welding point of the metal pipe, an air pump for conveying high-pressure gas to the nozzle, and a telescopic tube connecting the air pump and the nozzle.

[0019] Furthermore, the maintenance component includes: a liquid storage tank for storing maintenance liquid, an adsorption smear body for applying maintenance liquid to the welding part of the metal pipe, a second telescopic tube installed on the side wall of the liquid storage tank, a connecting tube fixedly installed at the bottom end of the second telescopic tube, a control unit for controlling the opening and closing of the inner cavity of the connecting tube, and a dispersion plate for dispersing the maintenance liquid and evenly spraying it on the surface of the adsorption smear body.

[0020] Furthermore, the control unit includes: a fixing bar fixedly installed on the inner wall of the connecting tube, a movable rod installed through the side wall of the fixing bar, a sealing block fixedly installed at one end of the movable rod, a movable block fixedly installed at the other end of the movable rod, and a linkage spring fixedly installed between the sealing block and the fixing bar.

[0021] Furthermore, the dispersion plate is fixedly mounted on the inner wall of the connecting pipe, and a plurality of through holes are opened on the side wall of the dispersion plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention discloses a welding device for metal parts, which achieves the purpose of clamping and fixing the outer side and inner wall of a metal pipe at the same time by setting a fixing mechanism, thereby improving the stability of clamping and the fixing effect, and realizing synchronous rotation of two metal pipes during welding, thereby preventing the phenomenon that the weld quality is affected by the asynchronous rotation of the two metal pipes, and improving the welding quality of the metal pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0025] Figure 1 It is a three-dimensional schematic diagram of a welding device for metal parts of the present invention;

[0026] Figure 2 It is a three-dimensional schematic diagram of another angle of a metal parts welding device of the present invention;

[0027] Figure 3A schematic cross-sectional view of a component platform of a metal parts welding device of the present invention;

[0028] Figure 4 A schematic cross-sectional view of a component linkage plate of a metal parts welding device of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of a rotating assembly of a metal parts welding device of the present invention;

[0030] Figure 6 It is a three-dimensional schematic diagram of a component installation box of a metal parts welding device of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of a clamping assembly of a metal parts welding device of the present invention;

[0032] Figure 8 It is a three-dimensional schematic diagram of a driving gear component of a metal parts welding device of the present invention;

[0033] Fig. 9 A welding device for metal parts of the present invention Figure 8 Enlarged view of point A in the middle;

[0034] Fig.10 A schematic cross-sectional view of a component connecting pipe of a welding device for metal parts of the present invention;

[0035] Fig.11 A welding device for metal parts of the present invention Fig.10 Enlarged view of point B in the middle;

[0036] Fig.12 The present invention is a schematic cross-sectional view of a component sleeve of a welding device for metal parts.

[0037] In the figure:

[0038] 1. Machine;

[0039] 2. U-shaped plate;

[0040] 3. Fixing mechanism; 31. Clamping assembly; 311. Outer clamping plate; 312. Inner clamping plate; 313. Driving unit; 3131. Power source 1; 3132. Driving gear; 3133. Driven gear; 3134. Rotating shaft; 3135. Linking gear; 3136. Linking rack; 3137. Connecting rod; 3138. Limiting rod; 3139. Installation box; 32. Docking assembly; 321. Power source two; 322, linkage plate; 323, limiter; 324, movable bar; 325, mounting plate; 326, guide unit; 3261, movable seat; 3262, guide rod; 3263, return spring; 3231, limiter; 33, rotating assembly; 331, power source three; 332, rotating rod; 333, sleeve; 334, slide bar; 335, transmission gear; 336, linkage gear ring;

[0041] 4. Welding mechanism; 41. Laser welding head; 42. Cooling assembly; 421. Air pump; 422. Telescopic tube 1; 423. Injection head; 43. Maintenance assembly; 431. Liquid storage tank; 432. Telescopic tube 2; 433. Connecting pipe; 434. Adsorption smear body; 435. Control unit; 436. Dispersing plate; 4351. Sealing block; 4352. Linking spring; 4353. Movable rod; 4354. Movable block;

[0042] 5. Metal pipe fittings. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0044] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0045] like Figures 1 to 12 As shown, a welding device for metal parts of the present invention comprises: a machine table 1, a U-shaped plate 2, the U-shaped plate 2 is fixedly mounted on the top of the machine table 1, a metal pipe 5, a fixing mechanism 3 for fixing the metal pipe 5 before welding, and a welding mechanism 4 for welding the metal pipe 5 after fixing;

[0046] The fixing mechanism 3 includes: a clamping assembly 31 for clamping and fixing the metal pipe 5, a docking assembly 32 for docking the metal pipe 5 after clamping, and a rotating assembly 33 for driving the metal pipe 5 to rotate and weld after docking;

[0047] Two clamping assemblies 31 are symmetrically arranged and located on the top of the machine 1. When the metal pipe 5 is welded, the two metal pipes 5 are first clamped and fixed by the two clamping assemblies 31 respectively, and then the two clamping assemblies 31 are driven to approach each other by the docking assembly 32, thereby driving the two metal pipes 5 to approach each other, so that the two ends of the metal pipes 5 to be welded abut against each other. After abutment, the rotating assembly 33 is started to synchronously drive the two metal pipes 5 to rotate, so that the welding points of the two metal pipes 5 can be welded.

[0048] The clamping assembly 31 includes: an installation box 3139 symmetrically arranged on the top of the machine 1, an outer clamping plate 311 for clamping and fixing the outer side of the metal pipe 5, an inner clamping plate 312 for clamping and fixing the inner wall of the metal pipe 5, and a driving unit 313 for moving the outer clamping plate 311 and the inner clamping plate 312; when clamping and fixing the metal pipe 5, first place the metal pipe 5, that is, one end of the metal pipe 5 is abutted against the side wall of the installation box 3139, and the outer clamping plate 311 is located on the outer side of the metal pipe 5, and the inner clamping plate 312 is located in the inner cavity of the metal pipe 5; when the metal pipe 5 is clamped and fixed, the metal pipe 5 is first placed, that is, one end of the metal pipe 5 is abutted against the side wall of the installation box 3139, and the outer clamping plate 311 is located on the outer side of the metal pipe 5, and the inner clamping plate 312 is located in the inner cavity of the metal pipe 5; After the metal pipe 5 is placed, by starting the driving unit 313, the outer clamping plate 311 and the inner clamping plate 312 can be synchronously driven to move, so that the outer clamping plate 311 and the inner clamping plate 312 are close to each other, so that the outer side and the inner wall of the metal pipe 5 can be clamped and fixed at the same time, thereby making the clamping stability of the metal pipe 5 high, solving the problem that in the prior art, only the outer wall of the metal pipe 5 is clamped and fixed, and the inner wall of the metal pipe 5 cannot be clamped and fixed, which easily leads to poor stability of the metal pipe 5 during the rotation welding process, affecting the welding quality of the metal pipe 5.

[0049] It should be added here that multiple groups of outer clamping plates 311 and inner clamping plates 312 are provided, so as to achieve the purpose of clamping and fixing the outer side and inner wall of the metal pipe 5 at the same time. On the one hand, the metal pipe 5 can be clamped and fixed from different directions, thereby improving the clamping stability and the fixing effect; on the other hand, the clamping area of ​​the metal pipe 5 is increased, thereby further improving the clamping stability and the fixing effect.

[0050] The driving unit 313 includes: a driving gear 3132 rotatably mounted on the inner wall of the installation box 3139, a power source 3131 driving the driving gear 3132 to rotate, the power source 3131 fixedly mounted on the inner wall of the installation box 3139, a rotating shaft 3134 rotatably mounted on the inner wall of the installation box 3139, a driven gear 3133 and a linkage gear 3135 fixedly sleeved on the outer edge of the rotating shaft 3134, the driven gear 3133 and the driving gear 3132 are mutually meshed, a linkage rack 3136 mutually meshed with the linkage gear 3135, a connecting rod 3137 fixedly mounted on the side wall of the linkage rack 3136, and a limiting rod 3138 for limiting and guiding the connecting rod 3137 during movement. A limiting opening is provided on the side wall of the installation box 3139, the outer edge of the connecting rod 3137 passes through the inner cavity of the limiting opening, the limiting rod 3138 passes through and is installed on the side wall of the connecting rod 3137, and both ends of the limiting rod 3138 are fixedly installed on the inner wall of the limiting opening. When the connecting rod 3137 moves, the connecting rod 3137 can be initially limited by the setting of the limiting opening, so that the connecting rod 3137 maintains movement in a straight line direction. The connecting rod 3137 can be further limited by the setting of the limiting rod 3138, thereby avoiding the displacement of the connecting rod 3137 when moving in the inner cavity of the limiting opening, and avoiding the separation of the connecting rod 3137 from the limiting opening, thereby ensuring the stability of the connecting rod 3137 during movement.

[0051] When the metal pipe 5 is placed, the driving gear 3132 can be driven to rotate by starting the power source 1 3131, and the driving gear 3132 drives the plurality of driven gears 3133 to rotate, and the driven gear 3133 drives the rotating shaft 3134 to rotate, and the rotating shaft 3134 drives the interlocking gear 3135 to rotate, and the interlocking gear 3135 drives the interlocking rack 3136 meshing with it to move, and the interlocking rack 3136 drives the connecting rod 3137 to move, and the outer clamping plate 311 and the outer clamping plate 311 are driven by the connecting rod 3137. The inner clamping plates 312 are close to each other, and the outer clamping plates 311 and the inner clamping plates 312 are close to each other, so that the outer side and the inner wall of the metal pipe 5 can be clamped and fixed at the same time, thereby making the clamping stability of the metal pipe 5 high, solving the problem that in the prior art, only the outer wall of the metal pipe 5 is clamped and fixed, but the inner wall of the metal pipe 5 cannot be clamped and fixed, which easily leads to poor stability of the metal pipe 5 during the rotation welding process, affecting the welding quality of the metal pipe 5.

[0052] In addition, the outer clamping plate 311 and the inner clamping plate 312 are both arranged in an arc shape, so that the outer clamping plate 311 and the inner clamping plate 312 can better fit with the outer side and the inner wall of the metal pipe 5, thereby ensuring the firmness of the clamping.

[0053] When the welding of the metal pipe 5 is completed, the power source 1 3131 is started to drive the driving gear 3132 to rotate in the opposite direction, the driving gear 3132 drives the multiple driven gears 3133 to rotate in the opposite direction, the driven gear 3133 drives the rotating shaft 3134 to rotate in the opposite direction, the rotating shaft 3134 drives the interlocking gear 3135 to rotate in the opposite direction, the interlocking gear 3135 drives the interlocking rack 3136 meshing therewith to move in the opposite direction, the interlocking rack 3136 drives the connecting rod 3137 to move in the opposite direction, and the outer clamping plate 311 and the inner clamping plate 312 are driven to move away from each other through the connecting rod 3137. By moving the outer clamping plate 311 and the inner clamping plate 312 away from each other, the clamping and fixing of the metal pipe 5 can be released, and the metal pipe 5 welded into one body can be easily removed.

[0054] It should be added here that the power source 3131 is preferably: a motor.

[0055] The docking assembly 32 includes: a linkage plate 322 movably mounted in the inner cavity of the U-shaped plate 2, a power source 321 for driving the linkage plate 322 to move up and down, the power source 321 is fixedly mounted on the side wall of the U-shaped plate 2, and a limiting member 323 is used to limit the linkage plate 322 during movement. The limiting member 323 includes: a limiting groove provided on the side wall of the U-shaped plate 2, a limiting strip 3231 fixedly mounted on the side wall of the linkage plate 322 and sliding in the inner cavity of the limiting groove. When the linkage plate 322 moves, the limiting strip 3231 can be driven to slide in the inner cavity of the limiting groove, thereby limiting the linkage plate 322. The plate 322 serves as a limit, avoiding the displacement of the linkage plate 322 when it moves, ensuring the stability of the up and down movement of the linkage plate 322, the mounting plate 325 for mounting the clamping assembly 31, a rectangular opening is provided on the top of the machine 1, and the outer edges of the two mounting plates 325 pass through the adjacent rectangular opening cavities. Through the setting of the two rectangular openings, the mounting plate 325 can be limited, the movable bar 324 is hingedly installed between the bottom of the linkage plate 322 and the side wall of the mounting plate 325, and the guide unit 326 guides the mounting plate 325.

[0056] When the metal pipe 5 is fixed, the connecting plate 322 can be driven to move downward by starting the power source 2 321, and the connecting plate 322 can drive the movable bar 324 to move downward. The two mounting plates 325 can be driven to approach each other through the movable bar 324, and the clamping assemblies 31 can be driven to approach each other through the mounting plate 325, thereby driving the two metal pipes 5 to approach each other, so that the ends of the two metal pipes 5 to be welded are abutted against each other, thereby completing the docking of the two metal pipes 5 and preparing for subsequent welding.

[0057] It is to be added that when the second power source 321 drives the linkage plate 322 to move downward, the linkage plate 322 will exert a downward thrust on the movable bar 324, and the thrust will be transmitted along the movable bar 324; since the movable bar 324 is rigid, it can effectively transmit the thrust to the mounting plate 325; the hinge connection feature allows the movable bar 324 to drive the two mounting plates 325 closer to each other while receiving the thrust, rather than simply rotating around the hinge point, thereby achieving the docking of the two metal pipes 5;

[0058] The second power source 321 is preferably: a cylinder.

[0059] The guide unit 326 includes: a movable seat 3261 symmetrically arranged in the inner cavity of the machine table 1, a guide rod 3262 for limiting and guiding the movable seat 3261 during movement, both ends of the guide rod 3262 are respectively fixedly mounted on the inner wall of the machine table 1, and a return spring 3263 for driving the movable seat 3261 to return, one end of the return spring 3263 is fixedly mounted on the inner wall of the machine table 1, and the other end is fixedly mounted on the side wall of the movable seat 3261;

[0060] When the mounting plates 325 are close to each other, the adjacent movable seats 3261 can be driven to be close to each other. By setting the guide rod 3262, the movable seats 3261 can be made to move linearly along the axial direction of the guide rod 3262, thereby avoiding the displacement of the movable seats 3261 during the movement process, and improving the stability of the movable seats 3261 during the movement process;

[0061] When the two movable seats 3261 are close to each other, the adjacent reset springs 3263 can be stretched. When the welding of the metal pipe 5 is completed and the metal pipe 5 is released, the power source 2 321 is started to drive the linkage plate 322 to move upward, thereby driving the two mounting plates 325 away from each other. The two mounting plates 325 drive the adjacent movable seats 3261 away from each other. At this time, the elastic force of the reset springs 3263 can assist the movable seats 3261 to reset, so as to prepare for subsequent use.

[0062] The rotating assembly 33 includes: a rotating rod 332 rotatably mounted on the side wall of the mounting plate 325, a power source 331 for driving the rotating rod 332 to rotate, a sleeve 333 sleeved on the outer edge of the rotating rod 332, the end of the sleeve 333 away from the power source 331 being rotatably mounted on the side wall of the adjacent mounting plate 325, a transmission gear 335 fixedly mounted on the outer edges of the rotating rod 332 and the sleeve 333 respectively, a linkage gear ring 336 fixedly mounted on the outer edge of the mounting box 3139 and meshing with the transmission gear 335, a slide groove opened on the inner wall of the sleeve 333, and a slide bar 334 fixedly mounted on the outer edge of the rotating rod 332 and sliding in the inner cavity of the slide groove.

[0063] When the metal pipe 5 is welded, the power source 331 is started to drive the rotating rod 332 to rotate, the rotating rod 332 drives the sliding bar 334 to rotate, and the sliding bar 334 drives the sleeve 333 to rotate. Through the synchronous rotation of the rotating rod 332 and the sleeve 333, the adjacent transmission gears 335 can be synchronously driven to rotate, and the two transmission gears 335 can synchronously drive the adjacent interlocking gear rings 336 to rotate, and the two interlocking gear rings 336 can drive the adjacent installation boxes 3139 to rotate, so that the two metal pipes 5 can be driven to rotate synchronously, thereby realizing the synchronous rotation of the two metal pipes 5 during the welding process, preventing the weld quality from being affected by the asynchronous rotation of the two metal pipes 5, and improving the welding quality of the metal pipe 5.

[0064] In the present application, by setting up the fixing mechanism 3, the purpose of clamping and fixing the outer side and the inner wall of the metal pipe 5 at the same time is achieved, the stability of the clamping is improved, the fixing effect is improved, and the two metal pipes 5 are rotated synchronously during the welding process, thereby preventing the weld quality from being affected by the asynchronous rotation of the two metal pipes 5, and improving the welding quality of the metal pipe 5.

[0065] The welding mechanism 4 includes: a laser welding head 41 for welding the metal pipe 5, the laser welding head 41 is fixedly installed at the bottom of the linkage plate 322, a cooling component 42 for cooling the welding part of the metal pipe 5 after welding, and a maintenance component 43 for maintaining the welding part of the metal pipe 5 after cooling; the cooling component 42 includes: an injection head 423 for injecting air to the welding part of the metal pipe 5, the injection head 423 is plugged and installed on the side wall of the linkage plate 322, an air pump 421 for conveying high-pressure gas to the injection head 423, and the air pump 421 is fixedly installed on the top of the U-shaped plate 2, and a telescopic tube 422 connects the air pump 421 and the injection head 423.

[0066] When the linkage plate 322 moves downward, the laser welding head 41 and the air jet head 423 are driven to move downward. As the linkage plate 322 moves downward, the welding ends of the two metal pipes 5 can be brought close to each other. When the welding ends of the two metal pipes 5 abut against each other, the laser welding head 41 and the air jet head 423 move to the optimal height from the welding point of the metal pipes 5. At this time, the laser welding head 41 and the rotating component 33 are started synchronously. Through the rotating component 33, the two metal pipes 5 can be driven to rotate synchronously, thereby achieving comprehensive welding of the welding ends of the two metal pipes 5 and improving the welding efficiency.

[0067] When the welded part of the welding end of the metal pipe 5 rotates to the bottom of the nozzle 423, the air pump 421 is started. The air pump 421 can deliver high-pressure gas to the nozzle 423. The high-pressure gas is sprayed on the welding part of the metal pipe 5 through the nozzle 423, so that the weld of the metal pipe 5 after welding can be cooled by blowing. By air cooling the weld, on the one hand, the temperature of the welding area can be reduced, the accumulation of thermal stress can be reduced, thereby reducing the risk of welding deformation, improving welding quality and welding efficiency, and compared with water cooling, the cooling is more uniform, avoiding the problem of cracks or deformation in the weld caused by too fast cooling speed; on the other hand, the debris and oxides remaining in the welding process can be removed, providing a clean and smooth metal surface for the application of the curing liquid, ensuring that the curing liquid can directly act on the clean metal surface to achieve the best protection effect.

[0068] The maintenance component 43 includes: a liquid storage tank 431 for storing the curing liquid, the liquid storage tank 431 is fixedly installed on the top of the U-shaped plate 2, the air pump 421 and the side wall of the liquid storage tank 431 are connected to an air supply pipe, and one end of the air supply pipe is plugged into the side wall of the liquid storage tank 431 near the top of the liquid storage tank 431 and is higher than the liquid level inside the liquid storage tank 431, so as to prevent the curing liquid from entering the inner cavity of the air supply pipe and applying the curing liquid to the welding part of the metal pipe 5. The adsorption smearing body 434 includes: a cylinder, a sponge layer fixedly sleeved on the outer edge of the cylinder, and a sponge layer plugged into the liquid storage tank 431. The telescopic tube 2 432 on the side wall of the box 431, the connecting tube 433 fixedly installed at the bottom end of the telescopic tube 2 432, the adsorption smearing body 434 rotatably installed in the inner cavity of the connecting tube 433, and close to the bottom end of the connecting tube 433, the connecting tube 433 is plugged and installed on the side wall of the linkage plate 322, the control unit 435 for controlling the opening and closing of the inner cavity of the connecting tube 433, and the dispersion plate 436 for dispersing the curing liquid and spraying it evenly on the surface of the adsorption smearing body 434, the dispersion plate 436 is fixedly installed on the inner wall of the connecting tube 433, and a plurality of through holes are opened on the side wall of the dispersion plate 436;

[0069] When the linkage plate 322 moves downward, the connection tube 433 is also driven to move downward, and the adsorption smear body 434 is driven to move downward through the connection tube 433, so as to weld the adsorption smear body 434 with the surface of the metal pipe 5.

[0070] When the air pump 421 is started, high-pressure gas can enter the inner cavity of the liquid storage tank 431 through the air delivery pipe, so that the pressure in the inner cavity of the liquid storage tank 431 gradually increases. When the pressure in the inner cavity of the liquid storage tank 431 reaches a certain value, the curing liquid in the inner cavity of the liquid storage tank 431 is squeezed into the second telescopic tube 432, and enters the inner cavity of the connecting tube 433 through the second telescopic tube 432. Then, the curing liquid impacts the control unit 435, so that the control unit 435 opens. The curing liquid is sprayed onto the dispersion plate 436 in the inner cavity of the connecting tube 433 through the control unit 435. Since a plurality of through holes are opened on the side wall of the dispersion plate 436, the curing liquid is dispersed and evenly sprayed on the surface of the adsorption coating body 434.

[0071] Since the adsorption smear body 434 is rollingly connected to the surface of the metal pipe 5, when the metal pipe 5 rotates, the adsorption smear body 434 is driven to rotate, so that the curing liquid is evenly applied to the weld of the cooled metal pipe 5. The curing liquid can form a dense protective film on the surface of the weld, which effectively prevents the metal from contacting with moisture and oxygen in the external environment, improves the welding quality, thereby reducing the possibility of metal rusting due to oxidation, and can maintain the gloss and integrity of the weld for a long time, thereby extending the service life of the metal structure.

[0072] It is added here that the adsorption smear body 434 includes: a cylinder, and a sponge layer fixedly mounted on the outer edge of the cylinder; the curing liquid can be absorbed by the sponge layer, and the curing liquid can be evenly applied to the welding parts of the metal pipe 5 through the relative rotation of the sponge layer and the metal pipe 5. Compared with directly spraying on the welding parts of the metal pipe 5, the application will be more comprehensive and uniform, and the curing liquid will not splash and cause waste, so that the curing liquid can better contact with the welding parts of the metal pipe 5, thereby better maintaining the welds and improving the welding quality.

[0073] In the actual operation of the present application, the staff starts the rotating assembly 33 and the laser welding head 41 at the same time, and the metal pipe 5 can be welded while rotating. When the welded part of the welding end of the metal pipe 5 rotates to the bottom of the nozzle 423, the staff starts the air pump 421, and the air pump 421 can deliver high-pressure gas to the nozzle 423. The high-pressure gas is sprayed on the welding part of the metal pipe 5 through the nozzle 423, so that the weld of the metal pipe 5 after welding can be cooled by blowing. By cooling the weld with air, the accumulation of thermal stress is reduced, thereby reducing the risk of welding deformation, and the residues and oxides generated during the welding process can be removed, providing a clean and smooth metal surface for the application of the curing liquid, ensuring that the curing liquid can directly act on the clean metal surface to achieve the best protection effect.

[0074] At the same time, high-pressure gas can enter the inner cavity of the liquid storage tank 431 through the gas transmission pipe, so that the pressure in the inner cavity of the liquid storage tank 431 gradually increases. When the pressure in the inner cavity of the liquid storage tank 431 reaches a certain value, the curing liquid in the inner cavity of the liquid storage tank 431 is squeezed into the telescopic tube 432 and enters the inner cavity of the connecting tube 433 through the telescopic tube 432. Then, the curing liquid impacts the control unit 435, so that the control unit 435 opens, and the curing liquid is sprayed onto the dispersion plate 436 in the inner cavity of the connecting tube 433 through the control unit 435. Since a plurality of through holes are opened on the side wall of the dispersion plate 436, , so that the curing liquid is dispersed and evenly sprayed on the surface of the adsorption smear body 434; since the adsorption smear body 434 is rollingly connected to the surface of the metal pipe 5, when the metal pipe 5 rotates, the adsorption smear body 434 is driven to rotate, so that the curing liquid is evenly applied to the weld of the cooled metal pipe 5. The curing liquid can form a dense protective film on the surface of the weld, which effectively prevents the metal from contacting with moisture and oxygen in the external environment, improves the welding quality, thereby reducing the possibility of metal rusting due to oxidation, and can maintain the gloss and integrity of the weld for a long time, thereby extending the service life of the metal structure.

[0075] The control unit 435 includes: a fixing bar fixedly installed on the inner wall of the connecting tube 433, a movable rod 4353 installed through the side wall of the fixing bar, a sealing block 4351 fixedly installed at one end of the movable rod 4353, a movable block 4354 fixedly installed at the other end of the movable rod 4353, and a linkage spring 4352 fixedly installed between the sealing block 4351 and the fixing bar.

[0076] When the control unit 435 is in a closed state, the sealing block 4351 seals the inner cavity of the connecting tube 433, and the curing liquid cannot be transported to the adsorption smear body 434 through the connecting tube 433;

[0077] When the air pump 421 is started, the air pump 421 also delivers high-pressure gas to the liquid storage tank 431, so that the pressure in the liquid storage tank 431 increases, thereby forcing the curing liquid to impact the control unit 435, so that the control unit 435 opens, that is, the curing liquid can drive the sealing block 4351 to move downward, and the sealing block 4351 drives the movable rod 4353 to move downward, and drives the linkage spring 4352 to compress. At this time, the sealing block 4351 does not have a sealing effect on the inner cavity of the connecting tube 433, and the curing liquid can be delivered to the adsorption smear body 434 through the connecting tube 433;

[0078] The movable rod 4353 slides on the side wall of the fixed bar to limit the sealing block 4351 so that the sealing block 4351 keeps moving in a straight line.

[0079] When the air pump 421 stops running, high-pressure gas is no longer delivered to the inner cavity of the liquid storage tank 431, and the pressure in the inner cavity of the liquid storage tank 431 no longer increases. At this time, the maintenance liquid in the inner cavity of the liquid storage tank 431 continues to be squeezed out until the pressure in the inner cavity of the liquid storage tank 431 is insufficient to keep the maintenance liquid in the open state of the control unit 435, and then the control unit 435 is closed. At this time, the maintenance liquid cannot be delivered to the adsorption smear body 434 through the connecting tube 433.

[0080] As an optional solution of this embodiment, since the operating time of the air pump 421 is certain each time the weld of the metal pipe 5 is cooled, the amount of high-pressure gas delivered to the inner cavity of the liquid storage tank 431 is certain, so that the amount of curing liquid squeezed out of the liquid storage tank 431 each time is certain, thereby achieving quantitative extrusion of the curing liquid, without the need to set up separate equipment to control the extrusion amount of the curing liquid, the structure is simple, and the failure rate is low.

[0081] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0082] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A welding device for metal parts, characterized in that: include: A machine platform, a U-shaped plate, a metal pipe, a fixing mechanism for fixing the metal pipe before welding, and a welding mechanism for welding the metal pipe after fixing; The fixing mechanism comprises: a clamping assembly for clamping and fixing the metal pipe fitting, a docking assembly for docking the metal pipe fitting after clamping, and a rotating assembly for driving the metal pipe fitting for rotational welding after docking; The clamping assembly includes: an installation box symmetrically arranged on the top of the machine, an outer clamping plate for clamping and fixing the outer side of the metal pipe, an inner clamping plate for clamping and fixing the inner wall of the metal pipe, and a driving unit for driving the outer clamping plate and the inner clamping plate to move; The docking assembly includes: a linkage plate movably mounted in the inner cavity of the U-shaped plate, a power source for driving the linkage plate to move up and down, a limiting member for limiting the linkage plate during movement, a mounting plate for mounting the clamping assembly, a movable bar hingedly mounted between the bottom of the linkage plate and the side wall of the mounting plate, and a guide unit for guiding the mounting plate; The rotating assembly includes: a rotating rod rotatably mounted on the side wall of the mounting plate, a power source 3 driving the rotating rod to rotate, a sleeve mounted on the outer edge of the rotating rod, a transmission gear respectively fixedly mounted on the outer edges of the rotating rod and the sleeve, a linkage gear ring fixedly mounted on the outer edge of the mounting box and meshing with the transmission gear, a slide groove provided on the inner wall of the sleeve, and a slide bar fixedly mounted on the outer edge of the rotating rod and sliding in the inner cavity of the slide groove; The driving unit comprises: a driving gear rotatably mounted on the inner wall of the installation box, a power source for driving the driving gear to rotate, a rotating shaft rotatably mounted on the inner wall of the installation box, a driven gear and a linkage gear fixedly sleeved on the outer edge of the rotating shaft, a linkage rack meshing with the linkage gear, a connecting rod fixedly mounted on the side wall of the linkage rack, and a limiting rod for limiting and guiding the connecting rod during movement; The limiting member comprises: a limiting groove provided on the side wall of the U-shaped plate, and a limiting strip fixedly mounted on the side wall of the linkage plate and sliding in the inner cavity of the limiting groove; The guide unit comprises: a movable seat symmetrically arranged in the inner cavity of the machine, a guide rod for limiting and guiding the movable seat during movement, and a reset spring for driving the movable seat to reset; The welding mechanism comprises: a laser welding head for welding the metal pipe, a cooling component for cooling the welded portion of the metal pipe after welding, and a maintenance component for maintaining the welded portion of the metal pipe after cooling; The maintenance component includes: a liquid storage tank for storing the curing liquid, an adsorption smear body for applying the curing liquid to the welding part of the metal pipe fitting, a second telescopic tube plugged and installed on the side wall of the liquid storage tank, a connecting tube fixedly installed at the bottom end of the second telescopic tube, a control unit for controlling the opening and closing of the inner cavity of the connecting tube, and a dispersing plate for dispersing the curing liquid and spraying it evenly on the surface of the adsorption smear body; The control unit includes: a fixing strip fixedly mounted on the inner wall of the connecting tube, a movable rod penetrating the side wall of the fixing strip, a sealing block fixedly mounted on one end of the movable rod, a movable block fixedly mounted on the other end of the movable rod, and a linkage spring fixedly mounted between the sealing block and the fixing strip.

2. A metal parts welding device as claimed in claim 1, characterized in that: A limit opening is provided on the side wall of the installation box, the outer edge of the connecting rod passes through the inner cavity of the limit opening, the limit rod is installed on the side wall of the connecting rod, and both ends of the limit rod are fixedly installed on the inner wall of the limit opening.

3. A metal parts welding device as claimed in claim 1, characterized in that: The cooling assembly includes: an air jet head for jetting air to the welding position of the metal pipe, an air pump for conveying high-pressure gas to the air jet head, and a telescopic pipe connecting the air pump and the air jet head.

4. A metal parts welding device as claimed in claim 1, characterized in that: The dispersion plate is fixedly mounted on the inner wall of the connecting pipe, and a plurality of through holes are opened on the side wall of the dispersion plate.

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