Metal pipe plasma welding device

Abstract

The present invention discloses a metal tube plasma welding device, comprising a workbench, a fixture assembly, a frame, at least one guide assembly and a welding assembly, wherein the fixture assembly is connected to the workbench and is used to clamp the cross-arranged metal tubes to be welded; the frame is connected to the workbench; the guide assembly comprises a guide member and a guide member, the guide member is connected to the frame and forms a first slideway symmetrical up and down, the first slideway is L-shaped or elliptical arc-shaped, the connecting part of the upper and lower parts of the first slideway is smoothly transitioned, and the guide member is slidably arranged on the first slideway; the welding assembly comprises a plasma welding gun and a first driving member, the plasma welding gun is connected to the guide member, the first driving member is connected to the frame and the plasma welding gun, and is used to drive the plasma welding gun to slide along the guide of the first slideway. The metal tube plasma welding device can realize the welding of the inclined surface of the metal tube and the peripheral wall.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipe plasma welding, and in particular to a metal pipe plasma welding device. Background Art

[0002] Chairs with metal frames are usually assembled by welding metal tubes. Currently, the metal tubes are usually cut into the required size first, and then bent according to the curvature required by the chair. The welder welds the cut and bent metal tubes according to the shape in the drawing, which requires high welding technology. After welding, spraying, sand blasting, sand washing, spraying and high-temperature baking are carried out.

[0003] When cutting a metal pipe, the end of the cut metal pipe is generally a plane, and the plane is perpendicular to the axis of the metal pipe. When welding, the plane of the metal pipe is welded to the peripheral wall of other metal pipes to achieve welding between different metal pipes.

[0004] The contact between the plane and the surrounding wall is line contact. After the plane and the surrounding wall are welded, the weld is a straight line with a short length. The weld between the plane and the surrounding wall needs to be filled manually to enhance the connection strength between the metal pipes. It is now found that the end face of the metal pipe is cut into a bevel and the edge of the bevel of the metal pipe is welded to the surrounding wall of the metal pipe. The weld after welding is arc-shaped, and the connection strength is much higher than the previous connection strength between the plane and the surrounding wall. There is no need to weld and fill the gap between the plane and the surrounding wall. However, due to the arc-shaped weld, manual welding is difficult. When using automated equipment for welding, it is necessary to purchase a high-precision multi-axis robot to achieve automated welding. Summary of the invention

[0005] In view of this, it is necessary to provide a metal pipe plasma welding device to solve the technical problem in the prior art that an expensive multi-axis welding robot needs to be purchased to achieve welding of the inclined surface of the metal pipe with the peripheral wall of the metal pipe.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention provides a metal pipe plasma welding device, comprising:

[0007] Workbench;

[0008] A clamp assembly connected to the workbench and used for clamping the cross-arranged metal pipes to be welded;

[0009] A frame connected to the workbench;

[0010] At least one guide assembly, the guide assembly comprising a guide member and a guide member, the guide member is connected to the frame and forms a first slideway symmetrical in upper and lower directions, the first slideway is L-shaped or elliptical, the connection between the upper and lower parts of the first slideway is smoothly transitioned, and the guide member is slidably disposed on the first slideway; and

[0011] The welding assembly comprises a plasma welding gun and a first driving member, wherein the plasma welding gun is connected to the guide member, and the first driving member is connected to the frame and the plasma welding gun and is used to drive the plasma welding gun to slide along the guide of the first slideway.

[0012] In one embodiment, the guide member is further provided with a second slide, the second slide is symmetrical with the first slide, and both ends of the second slide are connected with both ends of the first slide, the second slide is combined with the first slide to form a diamond-shaped or elliptical third slide, and the guide member is slidably arranged on the third slide.

[0013] In one embodiment, the guide assembly also includes a limit member, which includes at least two first limit portions, and the two first limit portions are spaced apart at the upper and lower sides of the first slide, and can slide in or out of the first slide along the axial direction of the guide member to limit the guide member from sliding along the first slide.

[0014] In one embodiment, when the first limiting portion extends into the first slide channel and the guide member slides to the top and bottom of the third slide channel, the guide member abuts against the first limiting portion on one side of the first slide channel to limit the guide member from sliding along the first slide channel.

[0015] In one embodiment, the limiting member further includes at least two second limiting portions, which are spaced apart at the upper and lower sides of the second slideway and can slide into or out of the second slideway along the axial direction of the guide member to limit the guide member from sliding along the second slideway.

[0016] In one embodiment, when the second limiting portion extends into the second slideway and the guide member slides to the top and the bottom of the third slideway, the guide member abuts against the second limiting portion on one side facing the second slideway.

[0017] In one embodiment, the limiting member further includes a second driving member, which is connected to the guide member and is connected to each of the first limiting portions in the limiting member, and is used to drive each of the first limiting portions to slide into or out of the first slideway.

[0018] In one embodiment, the limiting member further includes a third driving member, which is connected to the guide member and is connected to each of the second limiting portions in the limiting member, and is used to drive each of the second limiting portions to slide into or out of the second slideway.

[0019] In one embodiment, the guide member is formed with a plurality of the first slides and a plurality of the second slides, the second slides are arranged one-to-one with the first slides, the plurality of first slides are combined with the plurality of second slides to form a plurality of third slides, the plurality of third slides are concentrically arranged, and the sizes decrease successively in the direction approaching the center; the number of the guide members is multiple, the plurality of guide members correspond one-to-one with the third slides, and can extend into and slide out of the corresponding third slides to drive the plasma welding gun to form welds of different sizes.

[0020] In one embodiment, there are multiple guide assemblies, and the plasma welding gun is connected to multiple guide components.

[0021] Compared with the prior art, the beneficial effects of the present invention include: when welding, the metal pipe to be welded is fixed to the workbench by a clamp assembly, so that the inclined surface of the metal pipe fits the peripheral wall of other metal pipes, and then the first driving member is started, the first driving member drives the plasma welding gun to slide, and the plasma welding gun slides along the guide of the first slide through the guide member, so that the plasma welding gun slides in an L shape or an elliptical arc, and the edge of the inclined surface and the peripheral wall are welded. The weld formed by welding is arranged along the edge of the inclined surface and is consistent with the sliding trajectory of the plasma welding gun, thereby realizing the welding of the inclined surface of the metal pipe and the peripheral wall.

[0022] In the present application, compared with the existing high-precision multi-axis welding robots, it is only necessary to add guide members, guide members and a first driving member to the conventional welding device. The manufacturing and procurement costs of these components are much lower than those of the multi-axis welding robots. Moreover, during welding, it is necessary to program the multi-axis welding robot to reduce the difficulty of use. Compared with manual welding, the size of the welds formed by the welding device of the present application is consistent, which reduces the influence of human factors on the welding quality and reduces the technical difficulty of welding.

[0023] Secondly, a plasma welding gun is used for welding. In the prior art, arc welding or argon arc welding is generally used for welding metal pipes. Arc welding or argon arc welding generally requires the welding gun to directly contact the weld position, but the weld between the inclined surface and the surrounding wall is a three-dimensional arc structure, and it is difficult to ensure that the welding gun moves along the three-dimensional arc weld. In the present application, plasma welding technology is adopted by a plasma welding gun. The plasma welding gun sprays a plasma arc for welding. The plasma welding gun does not need to directly contact the metal pipe, and the change of the distance between the plasma welding gun and the metal pipe is not very sensitive to the welding quality; moreover, plasma welding can achieve high-speed welding and improve production efficiency, and is particularly suitable for mass production of metal chairs. The plasma welding method is more controllable. By accurately controlling the plasma current and gas flow, the welding parameters can be controlled to suit the welding of metal pipes of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a metal pipe plasma welding device according to an embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a metal pipe plasma welding device according to an embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a metal pipe plasma welding device according to an embodiment of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a metal pipe plasma welding device according to an embodiment of the present invention;

[0028] Figure 5 yes Figure 4 A local enlarged schematic diagram of the middle A;

[0029] Figure 6 It is a structural schematic diagram of a guide assembly in a metal tube plasma welding device according to an embodiment of the present invention;

[0030] Figure 7 It is a schematic structural diagram of a metal tube plasma welding device according to an embodiment of the present invention, in which a guide component is hidden behind a cover plate;

[0031] Figure 8 It is a structural schematic diagram of one side of a guide member, a guiding member and a limiting member in a metal tube plasma welding device according to an embodiment of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of one side of a guide member, a guiding member and a limiting member in a metal tube plasma welding device according to an embodiment of the present invention;

[0033] Fig.10It is a structural schematic diagram of the other side of the guide member, the guiding member and the limiting member in the metal tube plasma welding device according to one embodiment of the present invention.

[0034] Description of reference numerals:

[0035] Workbench 1;

[0036] Clamp assembly 2;

[0037] Transverse clamping member 21;

[0038] Transverse guide rail 211;

[0039] Transverse support 212;

[0040] Longitudinal clamping member 22;

[0041] Longitudinal guide rail 221;

[0042] Longitudinal bracket 222;

[0043] Pipe clamp 23

[0044] Clamping block 231;

[0045] Slider 232;

[0046] Locking bolt 233;

[0047] Rack 3;

[0048] Boot component 4;

[0049] Guide member 41;

[0050] First slideway 41a1;

[0051] Second slideway 41a2;

[0052] The third slide 41a;

[0053] A guide 42;

[0054] Guide column 421;

[0055] A clamping post 422;

[0056] A second spring 423;

[0057] Limiting member 43;

[0058] A first limiting portion 431;

[0059] A second limiting portion 432;

[0060] A second driving member 433;

[0061] A third driving member 434;

[0062] Connector 44;

[0063] Connecting seat 441;

[0064] Deck 442;

[0065] Card hole 442a;

[0066] A first spring 443;

[0067] Welding assembly 5;

[0068] Plasma welding gun 51;

[0069] A first driving member 52;

[0070] Linear guide 53;

[0071] Linear slider 54;

[0072] Linear drive member 55;

[0073] Connecting column 56;

[0074] Sleeve 57;

[0075] Metal tube 6. DETAILED DESCRIPTION

[0076] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0077] like Figures 1 to 10 As shown, the present invention provides a metal pipe plasma welding device, including a workbench 1, a clamp assembly 2, a frame 3, at least one guide assembly 4, and a welding assembly 5, wherein the clamp assembly 2 is connected to the workbench 1 and is used to clamp the cross-arranged metal pipes 6 to be welded; the frame 3 is connected to the workbench 1; the guide assembly 4 includes a guide member 41 and a guide member 42, the guide member 41 is connected to the frame 3, and forms a first slide 41a1 that is symmetrical up and down, the first slide 41a1 is L-shaped or elliptical arc-shaped, the connecting part of the upper and lower parts of the first slide 41a1 is smoothly transitioned, and the guide member 42 is slidably arranged on the first slide 41a1; the welding assembly 5 includes a plasma welding gun 51 and a first driving member 52, the plasma welding gun 51 is connected to the guide member 41, the first driving member 52 is connected to the frame 3 and the plasma welding gun 51, and is used to drive the plasma welding gun 51 to slide along the guide of the first slide 41a1.

[0078] When welding, the metal tube 6 to be welded is fixed to the workbench 1 through the clamp assembly 2, so that the inclined surface of the metal tube 6 fits the surrounding wall of other metal tubes 6, and then the first driving member 52 is started. The first driving member 52 drives the plasma welding gun 51 to slide, and the plasma welding gun 51 slides along the guide of the first slide 41a1 through the guide member 42, so that the plasma welding gun 51 slides in an L shape or an elliptical arc, and the edge of the inclined surface is welded to the surrounding wall. The weld formed by welding is arranged along the edge of the inclined surface and is consistent with the sliding trajectory of the plasma welding gun 51, thereby realizing the welding of the inclined surface of the metal tube 6 and the surrounding wall.

[0079] In the present application, compared with the existing high-precision multi-axis welding robot, it is only necessary to add a guide member 41, a guide member 42 and a first drive member 52 to the conventional welding device. The manufacturing and procurement costs of these components are much lower than those of the multi-axis welding robot. Moreover, during welding, it is necessary to program the multi-axis welding robot to reduce the difficulty of use. Compared with manual welding, the size of the weld formed by the welding device of the present application is consistent, which reduces the influence of human factors on the welding quality and reduces the technical difficulty of welding.

[0080] Secondly, a plasma welding gun 51 is used for welding. In the prior art, the metal tube 6 is generally welded by arc welding or argon arc welding. Arc welding or argon arc welding generally requires the welding gun to directly contact the weld position, but the weld between the inclined surface and the surrounding wall is a three-dimensional arc structure, and it is difficult to ensure that the welding gun moves along the three-dimensional arc weld. In the present application, plasma welding technology is adopted by a plasma welding gun 51. The plasma welding gun 51 sprays a plasma arc for welding. The plasma welding gun 51 does not need to directly contact the metal tube 6. The change in the distance between the plasma welding gun 51 and the metal tube 6 is not very sensitive to the welding quality. Moreover, plasma welding can achieve high-speed welding and improve production efficiency. It is particularly suitable for mass production of metal chairs. The plasma welding method is more controllable. By accurately controlling the plasma current and gas flow, the welding parameters can be controlled to suit the welding of metal tubes 6 of different thicknesses.

[0081] The first driving member 52 may be a cylinder, a hydraulic cylinder, an electric push rod, etc.

[0082] Among them, the gas supply and cooling structure matched with the plasma welding gun 51 is an existing technology, and will not be elaborated in detail in the specification and drawings of this application.

[0083] When the two inclined surfaces of the metal tube 6 are welded with the other two metal tubes 6, the two inclined surfaces of the metal tube 6 are symmetrically distributed, and the single first slide 41a1 enables the plasma welding gun 51 to move only along the inclined surface edge set in one direction, and it is impossible to weld the two ends of the metal tube 6 by one welding device. Figure 8 and Fig. 9In one embodiment, the guide member 41 is further provided with a second slide 41a2, the second slide 41a2 is symmetrical with the first slide 41a1, and both ends of the second slide 41a2 are connected with both ends of the first slide 41a1, the second slide 41a2 and the first slide 41a1 are combined to form a diamond or elliptical third slide 41a, and the guide member 42 is slidably arranged on the third slide 41a.

[0084] Through the above arrangement, when the guide member 41 slides along the first slide 41a1 and along the second slide 41a2, the motion trajectory formed is symmetrical, and the two symmetrical inclined surfaces at both ends of the metal tube 6 can be welded. Through simple adjustment, one welding device can weld multiple parts of the metal tube 6.

[0085] The first slide 41a1 and the second slide 41a2 may be slide rails arranged on the guide member 41 , or may be slide grooves opened on the guide member 41 . Specifically, the first slide 41a1 and the second slide 41a2 may be slide grooves opened on the guide member 41 .

[0086] It should be understood that the clamp assembly 2 can be an existing pipe clamping mechanism, specifically, Figure 3 As shown, in one embodiment, the clamp assembly 2 includes two transverse clamping members 21, a longitudinal clamping member 22 and three pipe clamping members 23, the two transverse clamping members 21 are arranged at intervals, the transverse clamping member 21 includes a transverse guide rail 211 and a transverse bracket 212, the transverse bracket 212 is vertically arranged and slidably connected to the transverse guide rail 211, the longitudinal clamping member 22 is arranged between the two transverse clamping members 21, the longitudinal clamping member 22 includes a longitudinal guide rail 221 and a longitudinal bracket 222, the longitudinal guide rail 221 is arranged between the two transverse guide rails 211, and is perpendicular to the transverse guide rail 211, and the longitudinal guide rail 221 slides The longitudinal guide rail 221 is connected, two of the three pipe clamps 23 are respectively arranged on the two transverse brackets 212, and the other is arranged on the longitudinal bracket 222. The pipe clamp 23 includes a clamping block 231, a sliding block 232 and a locking bolt 233. The clamping block 231 is connected to the corresponding bracket. A V-shaped groove is provided on the side of the clamping block 231 away from the bracket. The V-shaped groove of the clamping block 231 located on the transverse guide rail 211 is perpendicular to the setting direction of the V-shaped groove of the clamping block 231 located on the longitudinal bracket 222. The sliding block 232 is slidably connected to the clamping block 231, and the locking bolt 233 is threadedly connected to the sliding block 232.

[0087] When it is necessary to fix the metal pipes 6 to be welded which are perpendicular to each other, the metal pipes 6 are respectively set in the V-grooves of the three clamping blocks 231, and the metal pipes 6 are fixed by the locking bolts 233, and the metal pipes 6 to be welded are made to abut against each other, thereby achieving the fixation of the metal pipes 6 to be welded. By sliding the longitudinal bracket 222 and the longitudinal guide rail 221, the size of the metal pipe 6 to be welded can be adjusted.

[0088] The positions of the transverse bracket 212 and the longitudinal bracket 222 after sliding on the guide rail can be fixed, and the fixing method can be a limiting bolt or other limiting methods.

[0089] Since the guide member 42 can slide along the first slideway 41a1 as well as the second slideway 41a2, it is impossible to control the guide member 42 to slide along the first slideway 41a1 and the second slideway 41a2 as required. Figures 8 to 10 As shown, in one embodiment, the guide assembly 4 also includes a limit member 43, the limit member 43 includes at least two first limit portions 431, the two first limit portions 431 are spaced apart at the upper and lower sides of the first slide 41a1, and can slide in or out of the first slide 41a1 along the axial direction of the guide member 41 to limit the guide member 42 from sliding along the first slide 41a1.

[0090] By setting two first limit parts 431, when the two first limit parts 431 slide and extend into the first slide 41a1, the two first limit parts 431 can block the guide member 42 from sliding in the first slide 41a1, so as to limit the guide member 42 from sliding along the first slide 41a1, so that when the first driving member 52 drives the plasma welding gun 51 to move, the guide member 42 can only drive the plasma welding gun 51 to slide in the second slide 41a2, so that the plasma welding gun 51 forms a weld corresponding to the second slide 41a2 on the metal tube 6.

[0091] Since the first driving member 52 can only drive the plasma welding gun 51 and the guide member 42 to slide relative to the guide member 41, but cannot control the sliding direction of the guide member 42, and cannot control whether the guide member 42 slides into the first slideway 41a1 or the second slideway 41a2, Figures 8 to 10 As shown, in one embodiment, when the first limiting portion 431 extends into the first slide 41a1 and the guide member 42 slides to the top and bottom of the third slide 41a, the guide member 42 abuts against the first limiting portion 431 toward one side of the first slide 41a1 to limit the guide member 42 from sliding along the first slide 41a1.

[0092] When the first limiting portion 431 slides into the first slide 41a1, the guide member 42 in the initial position abuts against the first limiting portion 431 toward one side of the first slide 41a1. At this time, when the first driving member 52 drives the plasma welding gun 51 and the guide member 42 to slide, the guide member 42 is blocked by the first limiting portion 431 and cannot slide in the direction close to the first slide 41a1, thereby limiting the guide member 42 from sliding in the direction of the first slide 41a1, so that the guide member 42 can only slide in the second slide 41a2.

[0093] Since the guide member 42 can slide along the first slideway 41a1 as well as the second slideway 41a2, and the first limit portion 431 can only limit the guide member 42 from sliding in the first slideway 41a1, but cannot limit the guide member 42 from sliding in the second slideway 41a2, Figures 8 to 10 As shown, Figures 8 to 10 As shown, in one embodiment, the limiting member 43 also includes at least two second limiting portions 432, which are spaced apart at the upper and lower sides of the second slide 41a2 and can slide into or out of the second slide 41a2 along the axial direction of the guide member 41 to limit the guide member 42 from sliding along the second slide 41a2.

[0094] By setting two second limiting portions 432, when the two second limiting portions 432 slide and extend into the second slide 41a2, the two second limiting portions 432 can block the guide member 42 from sliding in the second slide 41a2, so as to limit the guide member 42 from sliding along the second slide 41a2, so that when the first driving member 52 drives the plasma welding gun 51 to move, the guide member 42 can only drive the plasma welding gun 51 to slide in the first slide 41a1, so that the plasma welding gun 51 forms a weld corresponding to the first slide 41a1 on the metal tube 6.

[0095] Since the first limiting portion 431 can only limit the guide member 42 from sliding along the first slideway 41a1 and from sliding into the first slideway 41a1, it cannot limit the guide member 42 from sliding into the second slideway 41a2. Figures 8 to 10 As shown, in one embodiment, when the second limiting portion 432 extends into the second slideway 41a2 and the guide member 42 slides to the top and bottom of the third slideway 41a, the guide member 42 abuts against the second limiting portion 432 on one side of the second slideway 41a2.

[0096] When the second limiting portion 432 slides into the second slide 41a2, the guide member 42 in the initial position abuts against the second limiting portion 432 toward one side of the second slide 41a2. At this time, when the first driving member 52 drives the plasma welding gun 51 and the guide member 42 to slide, the guide member 42 is blocked by the second limiting portion 432 and cannot slide in the direction close to the second slide 41a2, thereby limiting the guide member 42 from sliding in the direction of the second slide 41a2, so that the guide member 42 can only slide in the first slide 41a1.

[0097] It should be understood that the first limit portion 431 can be manually controlled to extend into and slide out of the first slideway 41a1, or the first limit portion 431 can be controlled to extend into and slide out of the first slideway 41a1 by a cylinder, a hydraulic cylinder or other equipment. Specifically, Fig.10 As shown, in one embodiment, the limiting member 43 also includes a second driving member 433, which is connected to the guide member 41 and is connected to each first limiting portion 431 in the limiting member 43, for driving each first limiting portion 431 to slide into or out of the first slide 41a1.

[0098] By providing the second driving member 433 , the second driving member 433 can drive the two first limiting portions 431 to slide into the first slideway 41 a 1 at the same time.

[0099] The second driving member 433 may be a cylinder, a hydraulic cylinder, an electric push rod, etc. The fixed end of the second driving member 433 is connected to the guide member 41, and the output end is connected to the plurality of first limiting parts 431 through a bracket.

[0100] It should be understood that the second limit portion 432 can be manually controlled to extend into and slide out of the second slideway 41a2, or the second limit portion 432 can be controlled to extend into and slide out of the second slideway 41a2 by a cylinder, a hydraulic cylinder or other device. Fig.10 As shown, in one embodiment, the limiting member 43 also includes a third driving member 434, which is connected to the guide member 41 and is connected to each second limiting portion 432 in the limiting member 43, and is used to drive each second limiting portion 432 to slide into or out of the second slide 41a2.

[0101] By providing the third driving member 434 , the third driving member 434 can drive the two second limiting portions 432 to slide into the second slideway 41 a 2 at the same time.

[0102] The third driving member 434 may be a cylinder, a hydraulic cylinder, an electric push rod, etc. The fixed end of the third driving member 434 is connected to the guide member 41, and the output end is connected to the plurality of second limiting parts 432 via a bracket.

[0103] Since the metal tubes 6 have different sizes, when the cross metal tubes 6 of different sizes are welded, the size of the weld formed by the bevel and the peripheral wall will be different. Figures 8 to 10 As shown, in one embodiment, the guide member 41 is formed with a plurality of first slides 41a1 and a plurality of second slides 41a2, the second slides 41a2 are arranged in a one-to-one correspondence with the first slides 41a1, the plurality of first slides 41a1 and the plurality of second slides 41a2 are combined to form a plurality of third slides 41a, the plurality of third slides 41a are concentrically arranged, and the size decreases successively along the direction approaching the center; there are a plurality of guide members 42, the plurality of guide members 42 correspond to the third slides 41a one-to-one, and can extend into and slide out of the corresponding third slides 41a, so as to drive the plasma welding gun 51 to form welds of different sizes.

[0104] When it is necessary to control the plasma welding gun 51 to form a weld corresponding to the metal tube 6, a guide member 42 is set on the corresponding third slide 41a, and then the first driving member 52 is started. The first driving member 52 drives the guide member 42 to slide in the third slide 41a, and the guide member 42 drives the plasma welding gun 51 to slide to form a weld of a size corresponding to the third slide 41a. By setting the guide member 41 on different welds, the plasma welding gun 51 can be guided to form different motion trajectories to form welds of different sizes.

[0105] Each of the third slideways 41 a is provided with two first limiting portions 431 and two second limiting portions 432 .

[0106] It should be understood that the multiple guide members 42 can be connected to the plasma welding gun 51 in a detachable manner. When the plasma welding gun 51 is required to slide along a different third slide 41a, the guide member 42 is inserted into the corresponding third slide 41a, and the guide member 42 is connected to the plasma welding gun 51. When the sliding trajectory of the plasma welding gun 51 is switched, the guide member 42 is removed, and the guide member 42 is set on another third slide 41a, and the guide member 42 after the position is changed can be connected to the third slide 41a, so that in a guide assembly 4, there is only one guide member 42 to guide the sliding of the plasma welding gun 51.

[0107] In order to facilitate the setting of the guide member 42 in the required third slideway 41a and to remove the unnecessary guide member 42 from the other third slideways 41a, for this purpose, as shown in FIG. Figure 6 and Figure 7As shown, in one embodiment, the guide assembly 4 further includes a connecting member 44, the connecting member 44 includes a connecting seat 441, a clamping seat 442 and a first spring 443, the connecting seat 441 is provided with a plurality of fixing holes relative to the plurality of third slideways 41a, the fixing holes are arranged one-to-one correspondingly to each third slideway 41a, the clamping seat 442 is slidably connected to the connecting seat 441, and the sliding direction of the clamping seat 442 is perpendicular to the insertion direction of the guide member 42, the clamping seat 442 is provided with a plurality of clamping holes 442a arranged at intervals, and the first spring 443 connects the connecting seat 441 and the clamping seat 442, and is used to provide elastic force for the clamping seat 442 to return to its original position after sliding;

[0108] The guide member 42 is arranged in a one-to-one correspondence with the fixing hole and the clamping hole 442a. The guide member 42 includes a guide column 421, a clamping column 422 and a second spring 423. The guide column 421 is slidably inserted in the fixing hole and can be slidably inserted in the third slide 41a through the fixing hole. The clamping column 422 is arranged relative to the clamping hole 442a and is perpendicular to the setting direction of the fixing hole. The side of the clamping column 422 facing the clamping seat 442 is an inclined side. When the guide column 421 is pressed, the side of the guide column 421 pushes the clamping seat 442 to move and can be inserted into the clamping hole 442a. The second spring 423 connects the guide column 421 and the connecting seat 441 to provide elastic force for the guide column 421 to separate from the third slide 41a.

[0109] The plasma welding gun 51 is connected to the connection base 441 , and is connected to the guide column 421 via the connection base 441 .

[0110] The clamping seat 442 and the connecting seat 441 can be slidably connected via a sliding groove and a sliding block.

[0111] The first driving member 52 is hinged to the connecting seat 441 , and is connected to the plasma welding gun 51 via the connecting seat 441 .

[0112] When it is necessary to realize that the guide member 42 is slidably inserted into the corresponding third slide 41a, the guide column 421 is pressed, and the guide column 421 is inserted into the corresponding third slide 41a. In the process of pressing the guide column 421, the clamping column 422 is driven to move, and the inclined surface of the clamping column 422 first abuts against the clamping seat 442 and pushes the clamping seat 442 to move. When the side slides over the clamping seat 442, the clamping column 422 abuts against the clamping seat 442 away from the side of the guide column 421 and slides relative to the clamping seat 442 until the clamping column 422 slides to the clamping hole 442a. At this time, the first spring 443 pushes the clamping seat 442 to reset, and makes the clamping hole 442a of the clamping seat 442 sleeved on the clamping seat, limiting the guide column 421 from continuing to move and limiting the guide column 421 from disengaging The third slide 41a; moreover, when the side of the clamping column 422 pushes the clamping seat 442 to move, the clamping hole 442a of the clamping seat 442 is disengaged from the clamping column 422 of other guide members 42. At this time, the second spring 423 in the other guide members 42 pushes the guide column 421 to disengage from the third slide 41a, and drives the clamping column 422 to move in the direction away from the guide member 41. In the process of switching different welding trajectories, it is only necessary to simply press a single guide column 421 in the guide assembly 4; at the same time, the clamping column 422 and the clamping hole 442a are matched with an axial hole, and the setting direction is the radial direction of the guide column 421. When the connecting seat 441 drives the guide column 421 to slide, it will not drive the clamping column 422 to move relative to the clamping hole 442a.

[0113] When a single guide assembly 4 is provided, during the process that the first driving member 52 drives the plasma welding gun 51 and the guide member 42 to slide, the guide member 42 may shake relative to the guide groove, and the stability of the movement is insufficient. Figure 5 and Figure 6 As shown, in one embodiment, the number of the guide assemblies 4 is multiple, and the plasma welding gun 51 is connected to multiple guide members 42 .

[0114] By providing a plurality of guide assemblies 4 and connecting the plasma welding gun 51 to a plurality of guide members 42 , when the first driving member 52 drives the plasma welding gun 51 to move, the plurality of guide members 42 provide guidance for the movement of the plasma welding gun 51 , so that the plasma welding gun 51 can move stably.

[0115] In order to weld the metal pipes 6 in different directions and positions by the plasma welding gun 51, the plasma welding gun 51 can be driven to slide by a linear guide rail 53, a linear motor, etc., specifically, as shown in FIG. Figure 4As shown, in one embodiment, the welding assembly 5 also includes a linear guide rail 53, a linear slider 54 and a linear drive member 55. The linear guide rail 53 is set on the frame 3 along the guide of the transverse guide rail 211, the linear slider 54 is slidably connected to the linear guide rail 53, and the linear drive member 55 connects the linear guide rail 53 and the linear slider 54 to drive the linear slider 54 to slide; the guide member 41 is connected to the linear slider 54, the fixed end of the first drive member 52 is hinged to the linear slider 54, the output end is hinged to the two connecting seats 441, and is connected to the plasma welding gun 51 through the connecting seat 441.

[0116] When it is necessary to weld the metal tubes 6 at different positions, the linear drive member 55 will drive the linear slider 54 to slide, and the linear slider 54 will slide along the linear guide rail 53. The linear slider 54 will drive the connecting seat 441, the guide member 41 and the plasma welding gun 51 to slide, so that the metal tubes 6 at different positions can be welded.

[0117] The linear drive component 55 can be a cylinder, a hydraulic cylinder, an electric push rod, etc. The fixed end of the linear drive component 55 is connected to the linear guide rail 53, and is connected to the frame 3 through the linear guide rail 53, and the output end is connected to the linear slider 54.

[0118] Since the plasma welding gun 51 needs to slide relative to the guide member 41, the connecting seat 441 needs to move horizontally relative to the guide member 41, and the connecting seat 441 and the guide member 41 are only connected through the guide member 42. This will cause the connecting seat 441 to slide unsteadily when the first driving member 52 drives the connecting seat 441 to move. For this reason, in one of the embodiments, the connecting seat 441 is slidably mounted on the guide member 41.

[0119] In this embodiment, the connecting seat 441 is slidably mounted on the guide member 41, which will not hinder the connecting seat 441 from driving the plasma welding gun 51 to move, and limits the freedom of movement of the connecting seat 44 relative to the guide member 41, so that the connecting seat 44 can move more smoothly relative to the guide member 41.

[0120] like Figure 5 As shown, in one of the embodiments, a connecting column 56 is formed at the bottom of the plasma welding gun 51, and the connecting column 56 is slidably inserted in the connecting seat 441, so that the plasma welding gun 51 can be rotated and lifted relative to the connecting seat 441, and a sleeve 57 is formed between the connecting column 56 and the plasma welding gun 51. The sleeve 57 is connected to the connecting column 56 and is sleeved on the plasma welding gun 51, and can adjust the axial position of the plasma welding gun 51.

[0121] Through the above arrangement, the height setting angle and the axial position of the plasma welding torch 51 can be adjusted.

[0122] The connecting column 56 and the connecting seat 441 can be fixed by means of threads and set screws.

[0123] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A metal tube plasma welding device, characterized in that: include: Workbench; A clamp assembly, connected to the workbench, used for clamping the cross-arranged metal pipes to be welded; A frame connected to the workbench; At least one guide assembly, the guide assembly includes a guide member, a guide member and a limit member, the guide member is connected to the frame and forms a first slideway symmetrical in upper and lower parts, the first slideway is L-shaped or elliptical, and the connecting part of the upper and lower parts of the first slideway is smoothly transitioned; the guide member is also provided with a second slideway, the second slideway is symmetrical with the first slideway, and the two ends of the second slideway are connected with the two ends of the first slideway, the second slideway and the first slideway are combined to form a diamond-shaped or elliptical third slideway, and the guide member is slidably arranged on the third slideway; the limit member includes at least two first limit portions and at least two second limit portions, the two first limit portions are spaced apart at the upper and lower sides of the first slideway, and can slide into or out of the first slideway along the axial direction of the guide member to limit the guide member from sliding along the first slideway; the two second limit portions are spaced apart at the upper and lower sides of the second slideway, and can slide into or out of the second slideway along the axial direction of the guide member to limit the guide member from sliding along the second slideway; and The welding assembly comprises a plasma welding gun and a first driving member, wherein the plasma welding gun is connected to the guide member, and the first driving member is connected to the frame and the plasma welding gun and is used to drive the plasma welding gun to slide along the guide of the first slideway.

2. The metal pipe plasma welding device according to claim 1, characterized in that: When the first limiting portion extends into the first slideway and the guide member slides to the top and the bottom of the third slideway, the guide member abuts against the first limiting portion on one side of the first slideway to limit the guide member from sliding along the first slideway.

3. The metal tube plasma welding device according to claim 1, characterized in that: When the second limiting portion extends into the second slideway and the guide member slides to the top and the bottom of the third slideway, the guide member abuts against the second limiting portion on one side facing the second slideway.

4. The metal pipe plasma welding device according to claim 2, characterized in that: The limiting member further includes a second driving member, which is connected to the guiding member and is connected to each of the first limiting portions in the limiting member, and is used to drive each of the first limiting portions to slide into or out of the first slideway.

5. The metal pipe plasma welding device according to claim 3, characterized in that: The limiting member further includes a third driving member, which is connected to the guiding member and is connected to each of the second limiting portions in the limiting member, and is used to drive each of the second limiting portions to slide into or out of the second slideway.

6. The metal tube plasma welding device according to claim 1, characterized in that: The guide member is formed with a plurality of the first slides and a plurality of the second slides, the second slides are arranged in a one-to-one correspondence with the first slides, the plurality of first slides are combined with the plurality of second slides to form a plurality of third slides, the plurality of third slides are concentrically arranged, and the sizes decrease successively in the direction approaching the center; the number of the guide members is multiple, the plurality of guide members correspond to the third slides in a one-to-one correspondence, and can extend into and slide out of the corresponding third slides to drive the plasma welding gun to form welds of different sizes.

7. The metal pipe plasma welding device according to claim 1, characterized in that: The number of the guide components is multiple, and the plasma welding gun is connected to multiple guide components.

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