Liquid cooling straight square pipeline laser spot welding device and method thereof

Abstract

The invention discloses a liquid cooling straight square pipeline laser spot welding device and method, and belongs to the technical field of welding. The liquid cooling straight square pipeline laser spot welding device comprises a machine table, a first horizontal linear module, a floating supporting module, a material moving alignment mechanism, a connector pre-connecting assembly and a welding mechanism; fixing tables are symmetrically and fixedly installed on the machine table, and fixing frames are distributed on the upper side of the machine table. The first horizontal linear module is fixedly installed on the machine table, and a first carrying table is fixedly installed at the moving end of the first horizontal linear module. Two groups of floating support modules for supporting and preliminarily positioning a square tube are mounted on the carrying table I; a material moving alignment mechanism is mounted on the fixing frame; a welding mechanism is mounted on the fixed table; the joint pre-connecting assembly is connected with the joint; the material moving alignment mechanism comprises a third horizontal linear module, a vertical air cylinder linear module, a material taking assembly, a first welding positioning assembly and a second welding positioning assembly. In this way, on the premise that the welding precision of the two sets is guaranteed, the overall welding efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a liquid cooling straight square pipeline laser spot welding device. BACKGROUND

[0002] To ensure structural rigidity and heat exchange efficiency, the cross section of the liquid cooling pipeline is often square; the liquid cooling pipeline includes a main rod pipeline and a branch pipeline, which are connected by a joint; when producing, a plurality of joints need to be welded on the square pipeline; and in the welding process, the cooperation gap between the joint and the square pipeline needs to be fixed before brazing, and the conventional way is to fix it by manual laser spot welding.

[0003] For example, Chinese patent CN119457526B discloses a square tube laser welding tool and laser welding equipment for assisting compression, which is used for supporting and positioning the welding member; during welding, the synchronous driving mechanism works, and under the cooperative action of the first and second compression wheels, the square tube can move stably along the welding route, thereby cooperating with the welding equipment to realize welding.

[0004] However, manual laser spot welding fixation is easy to cause one side gap of the joint to be large and the other side gap to be small, which affects the mechanical properties of the joint after forming, and the side with large gap is easy to cause gas leakage due to incomplete filling of the solder; and the existing automatic spot welding device and process method is difficult to ensure the accuracy of the joint and the square tube butt joint under the premise of ensuring efficiency.

[0005] Therefore, the present application designs a liquid cooling straight square pipeline laser spot welding device and method to solve the above problems. SUMMARY

[0006] In view of the above shortcomings of the prior art, the present application provides a liquid cooling straight square pipeline laser spot welding device.

[0007] To achieve the above purpose, the present application realizes the following technical scheme:

[0008] A liquid cooling straight square pipeline laser spot welding device, comprising a machine table, a horizontal linear module one, a floating support module, a material moving and positioning mechanism, a joint pre-connection assembly and a welding mechanism;

[0009] The machine table is symmetrically fixedly installed with a fixed table, and the upper side of the machine table is distributed with a fixed frame; the horizontal linear module one is fixedly installed on the machine table, and the moving end of the horizontal linear module one is fixedly installed with a stage one; the stage one is installed with two groups of floating support modules for supporting and preliminarily positioning the square tube;

[0010] The fixed frame is installed with a material moving and positioning mechanism; the fixed table is installed with a welding mechanism; the joint pre-connection assembly is connected with the joint;

[0011] The material moving and aligning mechanism comprises a horizontal linear module three, a vertical cylinder linear module, a material taking assembly, a welding positioning assembly one and a welding positioning assembly two, the horizontal linear module three is fixedly installed on the fixed frame, and a moving frame one is fixedly installed at the moving end of the horizontal linear module three; two groups of vertical cylinder linear modules are fixedly installed on the moving frame one; the material taking assembly is installed at the moving end of the vertical cylinder linear module; the welding positioning assembly one for positioning the pipe to be welded is installed on one group of the material taking assembly, and the welding positioning assembly two for positioning the pipe with the welded joint is installed on the other group of the material taking assembly.

[0012] Furthermore, the floating support module comprises a support box and a floating positioning module, the support box is fixedly installed on the stage one, and a plurality of floating positioning modules are installed in the support box.

[0013] Furthermore, the welding mechanism comprises a welding assembly one and a welding assembly two, the welding assembly one is installed on one side of the fixed table, and the welding assembly two is installed on the other side of the fixed table.

[0014] Furthermore, the floating positioning module comprises a guide rod one, a spring, a limiting block and a positioning block, the guide rod one is limitingly and slidably connected with the support box, the inner end of the guide rod one is fixedly installed with the positioning block, and the other end of the guide rod one is fixedly installed with the limiting block; the guide rod one is externally sleeved with the spring, one end of the spring is fixedly connected with the support box, and the other end of the spring is fixedly connected with the limiting block.

[0015] Furthermore, the material taking assembly comprises a mounting carrier plate, a mounting clamping plate, a moving assembly and a moving clamping plate, the mounting carrier plate is fixedly installed at the moving end of the vertical cylinder linear module, and the mounting clamping plates are fixedly installed on the mounting carrier plate at equal intervals; the moving assembly is installed on the mounting carrier plate, and the moving clamping plates are installed at equal intervals on the moving end of the moving assembly; the moving clamping plate and the mounting clamping plate cooperate to position and clamp the joint pre-connection assembly.

[0016] Furthermore, the moving assembly comprises a moving cylinder, a guide rod two and a moving carrier plate, the moving cylinder is fixedly installed on the mounting carrier plate, the moving carrier plate is fixedly installed at the moving end of the moving cylinder, the guide rods two are fixedly installed on both sides of the moving carrier plate in a symmetrical mode, and the guide rods two are limitingly and slidably connected with the mounting carrier plate; the moving clamping plate is fixedly installed on the moving carrier plate.

[0017] Further, the welding positioning assembly one comprises vertical positioning inserting rods, mounting rods, pneumatic inner supporting clamps and arc-shaped plates, two vertical positioning inserting rods are fixedly installed on one side of the mounting carrier plate; two mounting rods are fixedly installed on one side of the mounting carrier plate, the pneumatic inner supporting clamps are fixedly installed on the mounting rods, the output ends of the pneumatic inner supporting clamps are located on the lower side of the mounting rods, a plurality of arc-shaped plates are fixedly installed on the output ends of the pneumatic inner supporting clamps; the outer arc radius of the arc-shaped plate is same as the radius of the welding hole; the arc-shaped plate is located between adjacent movable carrier plates.

[0018] Further, the welding positioning assembly two comprises pneumatic clamps and conformal clamps, the pneumatic clamps are fixedly installed on the mounting carrier plate, two conformal clamps for clamping and positioning the joint pre-connection assembly are fixedly installed on the output ends of the pneumatic clamps.

[0019] Further, the joint pre-connection assembly comprises connecting rods, butt clamping blocks, threaded joints and positioning plates, the butt clamping blocks are fixedly installed on one end of the connecting rods, the positioning plates are fixedly installed on the other end of the connecting rods, the positioning plates are fixedly connected with the threaded joints, and the threaded joints are threadedly connected with the joints.

[0020] In order to better achieve the purpose of the present application, the present application also provides a square pipe joint welding method, comprising the following steps:

[0021] Step one: the joint pre-connection assembly is connected with the joint, so that a plurality of joint pre-connection assemblies are uniformly distributed at equal intervals on both sides of the taking assembly;

[0022] Step two: the square tube is placed into the supporting box and is preliminarily positioned by the floating positioning module; the vertical pneumatic cylinder linear module and the horizontal linear module take one side of the joint pre-connection assembly and drive the joint pre-connection assembly and the joint to move to the upper side of the square tube; the welding positioning assembly one is used for positioning the square tube in cooperation with the welding hole;

[0023] Step three: the welding assembly one and the welding assembly two respectively start to move from both ends of the square tube, so that the joint and the square tube are connected together; at the same time, the other side of the taking assembly takes another group of joint pre-connection assemblies and joints;

[0024] Step four: after welding, the horizontal linear module three drives the two groups of vertical pneumatic cylinder linear modules to move horizontally through the moving frame one, so that the other side of the taking assembly moves to the upper side of the supporting box; the welding positioning assembly two is used for positioning the square tube in cooperation with the joint pre-connection assembly on the joint welded on the square tube;

[0025] Step five: the welding assembly one and the welding assembly two respectively start to move from both ends of the square tube, and the welding assembly one spot welds on one side of the joint and the square tube.

[0026] Compared with the prior art, the present application has the beneficial effects that: by arranging two groups of vertical air cylinder linear modules and material taking assemblies, the present application realizes the welding of the pipes and the joints alternately, and when the first group of welding is performed, the welding positioning assembly one and the welding hole which has not been welded are used for positioning, and when the second group of welding is performed, the welding positioning assembly two and the joint pre-connection assembly on the joint which has been welded are used for positioning, so as to ensure the welding accuracy of the two groups of welding and the overall welding efficiency; the welding assembly one and the welding assembly two move from the two ends of the pipe respectively, the welding assembly one spot-welds at one side of the joint and the pipe, and the welding assembly two spot-welds at the other side of the joint and the pipe, so that the joint and the pipe are connected together, and the preliminary welding and fixation of the joint and the pipe are realized; in this process, the welding assembly one and the welding assembly two move towards each other, for example, when the welding assembly one and the welding assembly two move to the two sides of the same joint, the welding assembly one performs welding first, and then the welding assembly two performs welding, so as to ensure the welding efficiency, avoid welding the same joint at the same time, and avoid the influence of the welding assembly one and the welding assembly two on each other. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] Figure 1 is a perspective view of a liquid cooling straight type square pipe laser spot welding device of the present application Figure 1 ;

[0029] Figure 2 is a front view of a liquid cooling straight type square pipe laser spot welding device of the present application

[0030] Figure 3 is a right view of a liquid cooling straight type square pipe laser spot welding device of the present application

[0031] Figure 4 is a schematic view of a square pipe and its connecting structure

[0032] Figure 5 is a perspective view of a liquid cooling straight type square pipe laser spot welding device of the present application Figure 2 ;

[0033] Figure 6 is an enlarged view of A in FIG. 7 Figure 5

[0034] Figure 7 is a schematic view of a moving clamp plate and its connecting structure​

[0035] Figure 8 For Figure 7 enlarged view at B;

[0036] Figure 9 For Figure 7 enlarged view at C.

[0037] The reference signs in the figures respectively represent:

[0038] 1, machine table; 11, fixed frame; 12, fixed table; 2, horizontal linear module one; 21, loading table one; 3, floating support module; 31, support box; 32, floating positioning module; 321, guide rod one; 322, spring; 323, limit block; 324, positioning block; 4, material moving and aligning mechanism; 41, horizontal linear module three; 411, moving frame one; 42, vertical pneumatic cylinder linear module; 43, material taking assembly; 431, mounting plate; 432, mounting clamping plate; 433, moving pneumatic cylinder; 434, guide rod two; 435, moving plate; 436, moving clamping plate; 44, welding positioning assembly one; 441, vertical positioning inserting rod; 442, mounting rod; 443, pneumatic inner supporting clamping jaw; 444, arc plate; 45, welding positioning assembly two; 451, pneumatic clamping jaw; 452, conformable clamping plate; 5, joint pre-connection assembly; 51, connecting rod; 52, butt joint clamping block; 53, threaded joint; 54, positioning plate; 6, welding mechanism; 61, welding assembly one; 611, horizontal linear module two; 612, moving frame two; 613, laser spot welding machine; 62, welding assembly two; 7, joint; 8, square tube; 81, welding hole. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings of the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0040] In the following description, “left”, “right”, “front”, “back”, “up”, and “down” are oriented in the perspective of the front view.

[0041] Embodiment one: in some embodiments, referring to the accompanying drawings of the specification Figures 1-4 A liquid-cooled straight square tube laser spot welding device, comprising a machine table 1, a horizontal linear module one 2, a floating support module 3, a material moving and aligning mechanism 4, a joint pre-connection assembly 5, and a welding mechanism 6.

[0042] The machine table 1 is symmetrically fixedly installed with a fixed table 12, and the upper side of the machine table 1 is distributed with a fixed frame 11; a horizontal linear module one 2 is fixedly installed on the machine table 1, and a moving end of the horizontal linear module one 2 is fixedly installed with a carrier one 21; the carrier one 21 is installed with two groups of floating support modules 3 for supporting and preliminarily positioning the opposite pipes 8;

[0043] The fixed frame 11 is installed with a material moving and aligning mechanism 4; the fixed table 12 is installed with a welding mechanism 6; the joint pre-connection assembly 5 is connected with the joint 7;

[0044] As shown in the figure, Figure 2 The material moving and aligning mechanism 4 includes a horizontal linear module three 41, a vertical pneumatic cylinder linear module 42, a material taking assembly 43, a welding positioning assembly one 44 and a welding positioning assembly two 45, the fixed frame 11 is fixedly installed with the horizontal linear module three 41, and a moving end of the horizontal linear module three 41 is fixedly installed with a moving frame one 411; the moving frame one 411 is fixedly installed with two groups of vertical pneumatic cylinder linear modules 42; a moving end of the vertical pneumatic cylinder linear module 42 is installed with the material taking assembly 43; one group of the material taking assemblies 43 is installed with the welding positioning assembly one 44 for positioning the opposite pipe 8 matched with the welding hole 81, and the other group of the material taking assemblies 43 is installed with the welding positioning assembly two 45 for positioning the opposite pipe 8 matched with the welded joint 7.

[0045] As shown in the figure, Figure 2 The floating support module 3 includes a support box 31 and a floating positioning module 32, the support box 31 is fixedly installed on the carrier one 21, and the support box 31 is installed with multiple groups of floating positioning modules 32.

[0046] As shown in the figure, Figure 3 The welding mechanism 6 includes a welding assembly one 61 and a welding assembly two 62, the welding assembly one 61 is installed on one side of the fixed table 12, and the welding assembly two 62 is installed on the other side of the fixed table 12.

[0047] In this embodiment, when the liquid-cooled straight square pipeline laser spot welding device is normally working, the joint pre-connection assembly 5 is connected with the joint 7, then multiple joint pre-connection assemblies 5 are uniformly moved to the two sides of the material taking assembly 43 through an external feeding structure at equal intervals, the distance between the centers of the joint pre-connection assemblies 5 adjacent on the same side is twice the distance between the centers of the welding holes 81, and the joint pre-connection assemblies 5 on the two sides are staggered distributed;

[0048] The side of the machine table 1 places the square tube 8 into the support box 31, and the square tube 8 is preliminarily positioned by the floating positioning module 32, so that the square tube 8 is basically located in the middle of the support box 31, facilitating subsequent secondary precise positioning; the horizontal linear module one 2 moves the support box 31 and the square tube 8 to the lower side of the moving frame one 411 by the carrier one 21; at this time, the vertical pneumatic cylinder linear module 42 drives the material taking assembly 43 to pick up the joint pre-connection assembly 5 on one side, the material taking assembly 43 positions the joint pre-connection assembly 5, and then positions the joint 7 through the joint pre-connection assembly 5; the vertical pneumatic cylinder linear module 42 vertically moves upwardly the joint pre-connection assembly 5 and the joint 7 through the material taking assembly 43, and then the horizontal linear module three 41 horizontally moves the vertical pneumatic cylinder linear module 42 through the moving frame one 411, so that the material taking assembly 43 picking up the joint pre-connection assembly 5 on one side moves to the upper side of the support box 31; the vertical pneumatic cylinder linear module 42 vertically moves the joint pre-connection assembly 5 and the joint 7 through the material taking assembly 43, so that the joint 7 moves to the upper side of the square tube 8; at this time, the square tube 8 is positioned by the welding positioning assembly one 44 cooperating with the welding hole 81, so that the joint 7 is aligned with the welding hole 81, thereby ensuring the concentricity of the joint 7 and the welding hole 81 during subsequent welding, and avoiding the situation that the gap is large on one side and the gap is small on the other side, resulting in unevenness;

[0049] The welding assembly one 61 and the welding assembly two 62 respectively start to move from both ends of the square tube 8, the welding assembly one 61 spot-welds on one side of the joint 7 and the square tube 8, and the welding assembly two 62 spot-welds on the other side of the joint 7 and the square tube 8, so that the joint 7 and the square tube 8 are connected together, realizing preliminary welding and fixing of the joint 7 and the square tube 8; in this process, the welding assembly one 61 and the welding assembly two 62 move towards each other, for example, the welding assembly one 61 and the welding assembly two 62 move to both sides of the same joint 7, then the welding assembly one 61 is welded first, and then the welding assembly two 62 is welded, thereby ensuring the welding efficiency, and avoiding welding the same joint 7 at the same time, and avoiding the influence of the welding assembly one 61 and the welding assembly two 62 on each other;

[0050] During the welding process, the other material taking assembly 43 picks up another set of joint pre-connection assembly 5 and joint 7, and then the vertical pneumatic cylinder linear module 42 vertically moves the joint pre-connection assembly 5 and the joint 7 through the material taking assembly 43; after welding is completed, the joint 7 and the square tube 8 are loosened by the welding positioning assembly one 44 and the material taking assembly 43, and the material taking assembly 43 and the welding positioning assembly one 44 are reset by the vertical pneumatic cylinder linear module 42; the horizontal linear module three 41 horizontally moves the two sets of vertical pneumatic cylinder linear modules 42 through the moving frame one 411, so that the other material taking assembly 43 moves to the upper side of the support box 31;

[0051] The vertical air cylinder linear module 42 drives the other side of the material taking assembly 43 and the welding positioning assembly two 45 to vertically move, the joint pre-connection assembly 5 is positioned to the joint 7 through the material taking assembly 43, the joint pre-connection assembly 5 is positioned to the square tube 8 through the welding positioning assembly two 45 cooperating with the joint 7 welded on the square tube 8, so as to guarantee the concentricity between the other group of joints 7 and the welding hole 81; the welding assembly one 61 and the welding assembly two 62 respectively start to move from both ends of the square tube 8, the joint 7 and the square tube 8 are connected together through the welding assembly one 61 spot welding on one side of the joint 7 and the square tube 8, the joint 7 and the square tube 8 are connected together through the welding assembly two 62 spot welding on the other side of the joint 7 and the square tube 8, so as to realize the preliminary welding and fixation of the joint 7 and the square tube 8;

[0052] So as to realize welding of all welding holes 81 and joints 7; through the setting of the two groups of vertical air cylinder linear modules 42 and the material taking assembly 43, the square tube 8 and the joint 7 are alternately welded, when the first group is welded, the welding positioning assembly one 44 and the welding hole 81 which is not welded are positioned, when the second group is welded, the welding positioning assembly two 45 and the joint pre-connection assembly 5 on the joint 7 which has been welded are positioned, so as to guarantee the precision of the two groups of welding and the overall welding efficiency; at the same time, for the square tube 8 with relatively dense welding points, interval welding is carried out, so as to avoid the influence of adjacent welding points when continuously welding the components with close welding points.

[0053] In some embodiments, as a preferred embodiment of the present application, as shown in Figure 6 The floating positioning module 32 includes a guide rod one 321, a spring 322, a limiting block 323 and a positioning block 324, the guide rod one 321 is in limiting sliding connection with the support box 31, the inner end of the guide rod one 321 is fixedly installed with the positioning block 324, the other end of the guide rod one 321 is fixedly installed with the limiting block 323; the guide rod one 321 is externally sleeved with the spring 322, one end of the spring 322 is fixedly connected with the support box 31, the other end of the spring 322 is fixedly connected with the limiting block 323.

[0054] As shown in Figures 7-9 The material taking assembly 43 includes an installation carrier plate 431, an installation clamping plate 432, a moving assembly and a moving clamping plate 436, the installation carrier plate 431 is fixedly installed on the moving end of the vertical air cylinder linear module 42, the installation clamping plate 432 is uniformly fixedly installed on the installation carrier plate 431 at equal intervals; the moving assembly is installed on the installation carrier plate 431, the moving clamping plate 436 is uniformly installed on the moving end of the moving assembly at equal intervals; the moving clamping plate 436 and the installation clamping plate 432 cooperate to position and clamp the joint pre-connection assembly 5;

[0055] The moving assembly comprises a moving cylinder 433, guide rods two 434 and a moving carrier plate 435, the moving cylinder 433 is fixedly installed on the mounting carrier plate 431, the moving end of the moving cylinder 433 is fixedly installed with the moving carrier plate 435, the moving carrier plate 435 is symmetrically fixedly installed with the guide rods two 434 on both sides, and the guide rods two 434 are limitingly and slidably connected with the mounting carrier plate 431; a moving clamp plate 436 is fixedly installed on the moving carrier plate 435;

[0056] The welding positioning assembly one 44 comprises vertical positioning inserting rods 441, mounting rods 442, pneumatic inner supporting clamping jaws 443 and arc-shaped plates 444, two vertical positioning inserting rods 441 are fixedly installed on one side of the mounting carrier plate 431; two mounting rods 442 are fixedly installed on one side of the mounting carrier plate 431, the pneumatic inner supporting clamping jaws 443 are fixedly installed on the mounting rods 442, the output end of the pneumatic inner supporting clamping jaws 443 is located on the lower side of the mounting rods 442, and a plurality of arc-shaped plates 444 are fixedly installed on the output end of the pneumatic inner supporting clamping jaws 443; the outer arc radius of the arc-shaped plate 444 is same as the radius of the welding hole 81; the arc-shaped plate 444 is located between adjacent moving carrier plates 435;

[0057] The welding positioning assembly two 45 comprises pneumatic clamping jaws 451 and conformable clamping plates 452, the pneumatic clamping jaws 451 are fixedly installed on the mounting carrier plate 431, the output end of the pneumatic clamping jaws 451 is fixedly installed with two conformable clamping plates 452 for clamping and positioning the joint pre-connection assembly 5.

[0058] As shown in Figure 4 The joint pre-connection assembly 5 comprises a connecting rod 51, an abutting clamping block 52, a threaded joint 53 and a positioning plate 54, one end of the connecting rod 51 is fixedly installed with the abutting clamping block 52, the other end of the connecting rod 51 is fixedly installed with the positioning plate 54, the positioning plate 54 is fixedly connected with the threaded joint 53, and the threaded joint 53 is threadedly connected with the joint 7;

[0059] As shown in Figure 5 The welding assembly one 61 comprises a horizontal straight line module two 611, a moving frame two 612 and a laser spot welder 613, the horizontal straight line module two 611 is fixedly installed on the fixed table 12, the moving end of the horizontal straight line module two 611 is fixedly installed with the moving frame two 612, and the moving frame two 612 is fixedly installed with the laser spot welder 613;

[0060] In some embodiments, the moving frame two 612 is replaced with a straight line module whose moving direction is perpendicular to the horizontal straight line module two 611;

[0061] The welding assembly two 62 is same in structure as the welding assembly one 61.

[0062] In the embodiment, the square tube 8 is placed into the support box 31, the positioning block 324 is tightly attached to the square tube 8 through the multiple sets of guide rods one 321, springs 322 and limiting blocks 323, the movement range of the guide rods one 321 is limited through the limiting blocks 323, thereby limiting the movement range of the positioning block 324; further, after the square tube 8 is preliminarily positioned, the square tube 8 can move a small amount in each direction in the horizontal plane; the horizontal linear module three 41 drives the moving frame one 411 to move horizontally, the vertical pneumatic cylinder linear module 42 on the moving frame one 411 drives the mounting carrier plate 431 and the mounting clamping plate 432 to move vertically;

[0063] The threaded joint 53 is threadedly connected with the joint 7, the connecting length between the joint 7 and the positioning plate 54 is limited through the positioning plate 54; the mounting clamping plate 432 is aligned with the butt joint clamping block 52, the moving cylinder 433 drives the moving carrier plate 435 to move horizontally under the limiting action of the guide rod two 434, thereby driving the multiple moving clamping plates 436 to move horizontally, the multiple moving clamping plates 436 and the multiple mounting clamping plates 432 are cooperatively clamped to the multiple butt joint clamping blocks 52; after the joint 7 is driven to the upper side of the support box 31 through the butt joint clamping block 52, the connecting rod 51 and the threaded joint 53, the vertical pneumatic cylinder linear module 42 drives the mounting carrier plate 431 to move downward vertically, thereby driving the vertical positioning inserting rod 441, the mounting rod 442, the pneumatic inner supporting clamping jaw 443 and the arc plate 444 to move downward vertically, the vertical positioning inserting rod 441 contacts the inner bottom of the square tube 8 after penetrating through the welding hole 81, the arc plate 444 is inserted into the welding hole 81; then the pneumatic inner supporting clamping jaw 443 drives the arc plate 444 to be opened, the square tube 8 is positioned through the arc plate 444 and the welding hole 81; thereby ensuring that the relative position between the joint 7 and the square tube 8 is in the standard position; the horizontal linear module two 611 drives the moving frame two 612 and the laser spot welding machine 613 to move, the joint 7 and the square tube 8 are spot welded and fixed through the laser spot welding machine 613; in the process, the moving cylinder 433, the guide rod two 434, the moving carrier plate 435 and the moving clamping plate 436 of the other group cooperate with the mounting clamping plate 432 to clamp the other group of butt joint clamping blocks 52;

[0064] After the welding of the joint 7 and the square tube 8 is completed, the arc-shaped plate 444 is reset by the pneumatic inner support clamping jaw 443, the butt clamping block 52 is loosened by the installation clamping plate 432 and the moving clamping plate 436, the vertical positioning inserting rod 441, the installation rod 442, the pneumatic inner support clamping jaw 443 and the arc-shaped plate 444 are vertically moved upward by the vertical cylinder linear module 42, another set of installation clamping plate 432 and moving clamping plate 436 clamp another set of butt clamping block 52 and joint 7, and are moved to the upper side of the support box 31 under the driving of the horizontal linear module three 41 and the vertical cylinder linear module 42; at this time, the vertical cylinder linear module 42 drives the welding positioning assembly two 45 and the conformal clamping plate 452 to vertically move downward; the conformal clamping plate 452 is aligned with the butt clamping block 52 on the joint 7 welded on the square tube 8; the conformal clamping plate 452 is clamped tightly around the butt clamping block 52 by the pneumatic clamping jaw 451, the square tube 8 is positioned by the butt clamping block 52, the connecting rod 51, the threaded joint 53 and the joint 7; then the joint 7 and the square tube 8 are spot-welded by the laser spot welding machine 613.

[0065] In some embodiments, as shown in FIG. 3, as a preferred embodiment of the present application, a square tube joint welding method comprises the following steps: Figures 1-9

[0066] Step one: the joint pre-connection assembly 5 is connected with the joint 7, so that a plurality of joint pre-connection assemblies 5 are evenly distributed at equal intervals on both sides of the taking assembly 43;

[0067] Step two: the square tube 8 is placed into the support box 31 and is preliminarily positioned by the floating positioning module 32; the vertical cylinder linear module 42 and the horizontal linear module three 41 pick up the joint pre-connection assembly 5 on one side and drive the joint pre-connection assembly 5 and the joint 7 to move to the upper side of the square tube 8; the square tube 8 is positioned by the welding positioning assembly one 44 cooperating with the welding hole 81;

[0068] Step three: the welding assembly one 61 and the welding assembly two 62 respectively start to move from both ends of the square tube 8, so that the joint 7 and the square tube 8 are connected together; at the same time, the taking assembly 43 on the other side picks up another set of joint pre-connection assembly 5 and joint 7;

[0069] Step four: after the welding is completed, the horizontal linear module three 41 drives the two sets of vertical cylinder linear module 42 to move horizontally by the moving frame one 411, so that the taking assembly 43 on the other side moves to the upper side of the support box 31; the square tube 8 is positioned by the welding positioning assembly two 45 cooperating with the joint pre-connection assembly 5 on the joint 7 welded on the square tube 8;

[0070] Step five: the welding assembly one 61 and the welding assembly two 62 respectively start to move from both ends of the square tube 8, and the joint 7 and the square tube 8 are spot-welded on one side by the welding assembly one 61.

[0071] ​The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid-cooled laser spot welding device for straight square pipes, comprising a machine base (1), a horizontal linear module (2), a floating support module (3), a material transfer and alignment mechanism (4), a joint pre-connection assembly (5), and a welding mechanism (6), characterized in that: The machine tool (1) is symmetrically fixedly installed with fixed platforms (12) and fixed frames (11) are distributed on the upper side of the machine tool (1); the horizontal linear module (2) is fixedly installed on the machine tool (1) and the moving end of the horizontal linear module (2) is fixedly installed with a carrier platform (21); two sets of floating support modules (3) for supporting and initially positioning the square tube (8) are installed on the carrier platform (21). A material transfer and alignment mechanism (4) is installed on the fixed frame (11); a welding mechanism (6) is installed on the fixed table (12); and a joint pre-connection assembly (5) is connected to the joint (7). The material transfer and alignment mechanism (4) includes a horizontal linear module three (41), a vertical cylinder linear module (42), a material picking component (43), a welding positioning component one (44), and a welding positioning component two (45). The horizontal linear module three (41) is fixedly installed on the fixed frame (11), and a moving frame one (411) is fixedly installed on the moving end of the horizontal linear module three (41). Two sets of vertical cylinder linear modules (42) are fixedly installed on the moving frame one (411). The material picking component (43) is installed on the moving end of the vertical cylinder linear module (42). A welding positioning component one (44) is installed on one set of material picking components (43) for positioning the square tube (8) in conjunction with the welding hole (81), and a welding positioning component two (45) is installed on the other set of material picking components (43) for positioning the square tube (8) in conjunction with the welded joint (7).

2. The liquid-cooled straight square tube laser spot welding device according to claim 1, characterized in that, The floating support module (3) includes a support box (31) and a floating positioning module (32). The support box (31) is fixedly installed on the platform (21), and multiple floating positioning modules (32) are installed inside the support box (31).

3. The liquid-cooled straight square tube laser spot welding device according to claim 2, characterized in that, The welding mechanism (6) includes welding component one (61) and welding component two (62). Welding component one (61) is installed on a fixed platform (12) on one side, and welding component two (62) is installed on a fixed platform (12) on the other side.

4. The liquid-cooled straight square pipe laser spot welding device according to claim 3, characterized in that, The floating positioning module (32) includes a guide rod (321), a spring (322), a limiting block (323), and a positioning block (324). The guide rod (321) is slidably connected to the support box (31). The positioning block (324) is fixedly installed on the inner end of the guide rod (321), and the limiting block (323) is fixedly installed on the other end of the guide rod (321). The guide rod (321) is covered with a spring (322). One end of the spring (322) is fixedly connected to the support box (31), and the other end of the spring (322) is fixedly connected to the limiting block (323).

5. The liquid-cooled straight square pipe laser spot welding device according to claim 4, characterized in that, The material handling assembly (43) includes a mounting plate (431), a mounting clamp (432), a moving component, and a moving clamp (436). The mounting plate (431) is fixedly installed on the moving end of the vertical cylinder linear module (42). The mounting clamp (432) is evenly fixedly installed on the mounting plate (431) at equal intervals. The moving component is installed on the mounting plate (431). The moving end of the moving component is evenly installed with the moving clamp (436) at equal intervals. The moving clamp (436) and the mounting clamp (432) cooperate to position and clamp the pre-connection assembly (5).

6. The liquid-cooled straight square pipe laser spot welding device according to claim 5, characterized in that, The moving assembly includes a moving cylinder (433), a second guide rod (434), and a moving carrier plate (435). The moving cylinder (433) is fixedly installed on the mounting carrier plate (431). The moving end of the moving cylinder (433) is fixedly installed on the moving carrier plate (435). The second guide rod (434) is symmetrically fixedly installed on both sides of the moving carrier plate (435). The second guide rod (434) is slidably connected to the mounting carrier plate (431). The moving clamp plate (436) is fixedly installed on the moving carrier plate (435).

7. The liquid-cooled straight square pipe laser spot welding device according to claim 6, characterized in that, The welding positioning assembly (44) includes a vertical positioning rod (441), a mounting rod (442), a pneumatic internal support gripper (443), and an arc plate (444). Two vertical positioning rods (441) are fixedly installed on one side of the mounting plate (431). Two mounting rods (442) are fixedly installed on one side of the mounting plate (431). A pneumatic internal support gripper (443) is fixedly installed on the mounting rod (442). The output end of the pneumatic internal support gripper (443) is located below the mounting rod (442). Multiple arc plates (444) are fixedly installed on the output end of the pneumatic internal support gripper (443). The outer arc radius of the arc plate (444) is the same as the radius of the welding hole (81). The arc plate (444) is located between adjacent movable plates (435).

8. The liquid-cooled straight square pipe laser spot welding device according to claim 7, characterized in that, The welding positioning assembly 2 (45) includes a pneumatic gripper (451) and a conformal clamp (452). The pneumatic gripper (451) is fixedly installed on the mounting plate (431). Two conformal clamps (452) for clamping and positioning the joint pre-connection assembly (5) are fixedly installed at the output end of the pneumatic gripper (451).

9. The liquid-cooled straight square pipe laser spot welding device according to claim 8, characterized in that, The pre-connection assembly (5) includes a connecting rod (51), a mating clamping block (52), a threaded connector (53), and a positioning plate (54). The mating clamping block (52) is fixedly installed at one end of the connecting rod (51), and the positioning plate (54) is fixedly installed at the other end of the connecting rod (51). The positioning plate (54) is fixedly connected to the threaded connector (53), and the threaded connector (53) is threadedly connected to the connector (7).

10. A method for welding square pipe joints, utilizing the liquid-cooled straight square pipe laser spot welding device as described in claim 9, characterized in that, Includes the following steps: Step 1: Connect the pre-connection assembly (5) to the connector (7) so that multiple pre-connection assemblies (5) are evenly distributed at equal intervals on both sides of the material taking assembly (43); Step 2: Place the square tube (8) into the support box (31) and perform initial positioning through the floating positioning module (32); after the vertical cylinder linear module (42) and the horizontal linear module three (41) pick up the joint pre-connection component (5) on one side, they drive the joint pre-connection component (5) and the joint (7) to move to the upper side of the square tube (8); and position the square tube (8) by the welding positioning component one (44) in conjunction with the welding hole (81); Step 3: Welding component one (61) and welding component two (62) move from both ends of the square tube (8) to connect the joint (7) and the square tube (8); at the same time, the material picking component (43) on the other side picks up another set of joint pre-connection components (5) and joint (7). Step 4: After welding is completed, the horizontal linear module 3 (41) drives the two sets of vertical cylinder linear modules (42) to move horizontally through the moving frame 1 (411), so that the material picking component (43) on the other side moves to the upper side of the support box (31); the welding positioning component 2 (45) cooperates with the joint pre-connection component (5) on the joint (7) welded on the square tube (8) to position the square tube (8); Step 5: Welding component one (61) and welding component two (62) move from both ends of the square tube (8) respectively, and spot weld on one side of the joint (7) and the square tube (8) through welding component one (61).

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