Welding fixture

Abstract

The utility model relates to the technical field of welding, and provides a welding fixture, which is used for clamping a welding gun body and comprises a connecting block and a clamping block. The first end of the fine adjustment sliding block is in sliding connection with the connecting block; the first fixing assembly is used for fixing the relative positions of the fine adjustment sliding block and the connecting block; the first end of the connecting arm is rotationally connected with the second end of the fine adjustment sliding block; the second fixing assembly is used for fixing the relative positions of the connecting arm and the fine adjustment sliding block; the clamping wrist is rotationally connected with the second end of the connecting arm, and the clamping wrist has a clamping state for clamping the welding gun body and a non-clamping state for allowing the welding gun body to be disassembled and assembled; and the third fixing assembly is used for fixing the relative positions of the clamping wrist and the fine adjustment sliding block. According to the welding fixture provided by the utility model, the angle of the welding gun body can be conveniently adjusted, and the arcing height of the welding gun body can be conveniently and finely adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a welding fixture. Background Art

[0002] Tungsten inert gas welding (TIG welding) is a welding method that uses high melting point tungsten metal as electrode and inert gas as shielding gas. This method has the characteristics of stable arc, excellent welding quality and beautiful weld formation, and is widely used in key welds for base welding or high-quality welding.

[0003] In order to meet welding needs, the number of welding gun bodies will be selected according to actual conditions. Single-gun welding and double-gun welding are currently more common welding techniques.

[0004] In order to realize automatic welding, a welding fixture is usually required to clamp the welding gun body. However, the welding fixture in the related art is cumbersome or impossible to adjust the angle between the welding gun body and the workpiece to be welded, and to fine-tune the arc starting height between the tungsten electrode of the welding gun body and the workpiece to be welded. Utility Model Content

[0005] The utility model aims to provide a welding fixture to solve the problem that the welding fixture in the prior art cannot conveniently adjust the angle between the welding gun body and the workpiece to be welded and cannot conveniently fine-tune the arc starting height between the tungsten electrode of the welding gun body and the workpiece to be welded.

[0006] In order to achieve the above-mentioned purpose, according to the first aspect of the utility model, a welding clamp is provided for clamping a welding gun body, and the welding clamp comprises: a connecting block; a fine-tuning slider, a first end of the fine-tuning slider is slidably connected to the connecting block; a first fixing assembly, the first fixing assembly is connected to the connecting block and the fine-tuning slider, and is used to fix the relative position of the fine-tuning slider and the connecting block; a connecting arm, a first end of the connecting arm is rotatably connected to the second end of the fine-tuning slider; a second fixing assembly, the second fixing assembly is connected to the connecting arm and the fine-tuning slider, and is used to fix the relative position of the connecting arm and the fine-tuning slider; a clamping wrist, the clamping wrist is rotatably connected to the second end of the connecting arm, and the clamping wrist has a clamping state for clamping the welding gun body and a non-clamping state for allowing the welding gun body to be disassembled and assembled; a third fixing assembly, the third fixing assembly is connected to the clamping wrist and the fine-tuning slider, and is used to fix the relative position of the clamping wrist and the fine-tuning slider.

[0007] Furthermore, the welding fixture is a double-gun TIG welding fixture; two fine-tuning sliders are symmetrically arranged on the connecting block; two groups of first fixing components are respectively used to fix the relative positions of the two fine-tuning sliders and the connecting block; the two connecting arms are respectively connected to the two fine-tuning sliders in a one-to-one correspondence; the two groups of second fixing components are respectively used to fix the relative positions between the two connecting arms and the two fine-tuning sliders; the two clamping arms are respectively connected to the two connecting arms in a one-to-one correspondence; the two clamping arms are respectively used to clamp the two welding gun bodies; the two groups of third fixing components are respectively used to fix the relative positions between the two clamping arms and the two connecting arms.

[0008] Furthermore, by adjusting the relative position between the connecting arm and the fine-tuning slider, or by adjusting the relative position between the clamping wrist and the connecting arm, the angle between the two welding gun bodies or the distance between the two tungsten electrodes of the two welding gun bodies can be adjusted; by adjusting the relative position between the fine-tuning slider and the connecting block, the arc starting height between the tungsten electrodes of the two welding gun bodies and the workpiece to be welded can be fine-tuned.

[0009] Furthermore, each clamping arm can rotate 360° relative to its corresponding connecting arm; the second ends of the two connecting arms have a first extreme position closest to each other and a second extreme position farthest from each other; the second ends of the two connecting arms can swing between their first extreme position and second extreme position respectively, and the swingable angle of the second ends of the two connecting arms is greater than 0° and less than 90°; the adjustable range of the angle between the two welding gun bodies is 30° to 120°; the adjustable range of the distance between the two tungsten poles of the two welding gun bodies is 0.1mm to 50mm.

[0010] Furthermore, the connecting block has a slide groove with an opening at the lower end surface, and the upper end surface of the connecting block is provided with a clearance hole connected to the slide groove; the first end of the fine-tuning slider has a sliding portion, and the sliding portion is slidably connected to the slide groove; the top of the sliding portion has a first threaded hole; the first fixing assembly includes a first fixing piece, the first fixing piece includes a connected screw and a head, the screw is threadedly connected to the first threaded hole after passing through the clearance hole, and the lower surface of the head is in contact with the upper surface of the connecting block; the side wall of the connecting block has a second threaded hole connected to the slide groove; the first fixing assembly also includes a second fixing piece, and the second fixing piece has an external thread structure adapted to the second threaded hole; when the second fixing piece is in a loosened state, the relative position of the fine-tuning slider and the connecting block can be adjusted by rotating the first fixing piece; when the second fixing piece is threadedly connected to the second threaded hole and is in a locking state abutting against the sliding portion, the sliding portion abuts against the inner wall of the slide groove, and the relative positions of the fine-tuning slider and the connecting block are fixed.

[0011] Furthermore, the second end of the fine-tuning slider has a first circular mounting hole, and the first end of the connecting arm has a second circular mounting hole; the second fixing assembly includes a first bolt and a first nut, and the first bolt is threadedly connected to the first nut after passing through the first mounting hole and the second mounting hole in sequence; the second end of the fine-tuning slider also has a third mounting hole in the shape of an arc, and the first end of the connecting arm also has a fourth circular mounting hole located below the second mounting hole; the second fixing assembly also includes a second bolt and a second nut, and the second bolt is threadedly connected to the second nut after passing through the third mounting hole and the fourth mounting hole; when the first bolt and the first nut are in a loosened state and the second bolt and the second nut are in a loosened state, the connecting arm can rotate relative to the fine-tuning slider with the axis of the second mounting hole as the center, and the second bolt can slide in the slideway formed by the third mounting hole as the connecting arm rotates; when the first bolt and the first nut are in a locked state and the second bolt and the second nut are in a locked state, friction is generated between the connecting arm and the fine-tuning slider, and the relative position between the connecting arm and the fine-tuning slider is fixed.

[0012] Furthermore, the first end of the fine-tuning slider includes a sliding portion arranged in a rectangular parallelepiped, and the second end of the fine-tuning slider includes a connecting portion arranged in a fan shape.

[0013] Furthermore, the second end of the connecting arm has a rotating hole, and the side of the connecting arm is provided with a plurality of third threaded holes connected to the rotating hole; the clamping arm includes a rotating shaft, and the rotating shaft is rotatably arranged in the rotating hole; the third fixing assembly includes a plurality of third fixing parts corresponding to the plurality of third threaded holes one by one, and each third fixing part has an external thread structure adapted to each third threaded hole; when each third fixing part is in a loosened state, the relative position of the clamping arm and the connecting arm can be adjusted by rotating the rotating shaft; when each third fixing part is threadedly connected to each third threaded hole one by one and is in a locked state abutting against the rotating shaft, the relative position of the clamping arm and the connecting arm is fixed.

[0014] Furthermore, the clamping arm includes an annular wall, a third bolt and a third nut, the annular wall forms an accommodating space for accommodating the welding gun body, the front end of the annular wall has a notch, the two sides of the notch have two extended ends, the centers of the two extended ends each have a through hole, the third bolt passes through the two through holes and is threadedly connected with the third nut; when the third bolt and the third nut are in a loosened state, the clamping arm is in a non-clamping state, and the welding gun body can be placed in or taken out of the accommodating space; when the third bolt and the third nut are in a locked state, the clamping arm is in a clamping state, and the annular wall undergoes elastic deformation to clamp the welding gun body.

[0015] Furthermore, the welding fixture also includes a flange, a fourth bolt and a fourth nut, the flange has a first connecting hole, the connecting block is provided with a second connecting hole, the fourth bolt passes through the first connecting hole and the second connecting hole and is threadedly connected to the fourth nut to fix the flange to the connecting block; the flange also has a third connecting hole for connecting to a robot arm to realize automated welding.

[0016] When using the welding fixture provided in the present application, the welding gun body is clamped by using the clamping wrist, and the relative position between the clamping wrist and the connecting arm can be adjusted by rotating the clamping wrist, and the relative position between the connecting arm and the fine-tuning slider can be adjusted by rotating the connecting arm, so that the angle between the welding gun body and the workpiece to be welded can be conveniently adjusted; the relative position between the fine-tuning slider and the connecting block can be adjusted by sliding the fine-tuning slider, so that the arc starting height between the welding gun body and the workpiece to be welded can be conveniently adjusted; after adjusting the welding gun body to the desired state, the relative position of the fine-tuning slider and the connecting block is fixed by the first fixing component, the relative position of the connecting arm and the fine-tuning slider is fixed by the second fixing component, and the relative position of the clamping wrist and the fine-tuning slider is fixed by the third fixing component.

[0017] The welding fixture provided by the utility model can conveniently adjust the angle between the welding gun body and the workpiece to be welded, and can conveniently fine-tune the arc starting height between the tungsten electrode of the welding gun body and the workpiece to be welded.

[0018] The double-gun TIG welding fixture provided by the utility model can simulate the clamping effect of the arm on the welding gun body during manual welding through the rotation of two connecting arms; each welding gun body has an independent connecting arm, and each connecting arm can independently adjust the welding gun body with a high degree of freedom. The advantage of this clamping method is that when adjusting, it is only necessary to adjust the welding gun body to the desired position and tighten the corresponding fixing component to complete the clamping operation of the welding gun body; secondly, the utility model can adjust the position of the welding gun body by rotating the connecting arm, and can achieve stepless adjustment of the position parameters of the welding gun body. In addition, the utility model also has a fine-tuning function, which can fine-tune the arc starting height of the welding gun body to avoid the problem of different arc lengths of the two guns due to inaccurate height adjustment of the welding gun body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1A schematic diagram of the three-dimensional structure of a double-gun TIG welding fixture at one angle is shown in an optional embodiment of the utility model;

[0021] Figure 2 Shows Figure 1 A schematic diagram of the three-dimensional structure of the double-gun TIG welding fixture from another angle;

[0022] Figure 3 Shows Figure 1 A cross-sectional view of a partial structure of a double-gun TIG welding fixture;

[0023] Figure 4 Shows Figure 1 A schematic diagram of the structure of the double-gun TIG welding fixture when the angle between the two welding gun bodies is the smallest;

[0024] Figure 5 Shows Figure 1 A schematic diagram of the structure of the double-gun TIG welding fixture when the angle between the two welding gun bodies is the largest;

[0025] Description of Figure Numbers:

[0026] 1. welding gun body; 10. connecting block; 11. slide groove; 12. clearance hole; 13. second threaded hole; 20. fine-tuning slider; 21. sliding part; 211. first threaded hole; 22. connecting part; 221. first mounting hole; 222. third mounting hole; 30. first fixing assembly; 31. first fixing piece; 311. screw rod; 312. head; 32. second fixing piece; 40. connecting arm; 41. third threaded hole; 50. second fixing assembly; 51. first bolt; 52. first nut; 53. second bolt; 54. second nut; 60. clamping wrist; 61. rotating shaft; 62. annular wall; 621. notch; 622. extension end; 623. through hole; 63. third bolt; 64. third nut; 70. third fixing assembly; 71. third fixing piece; 80. flange; 81. third connecting hole; 90. fourth bolt; 100. fourth nut. DETAILED DESCRIPTION

[0027] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. If not specifically stated, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0028] Combination Figures 1 to 5As shown, the embodiment of the utility model provides a welding fixture for clamping a welding gun body 1, the welding fixture includes a connecting block 10, a fine-tuning slider 20, a first fixing component 30, a connecting arm 40, a second fixing component 50, a clamping wrist 60 and a third fixing component 70, the first end of the fine-tuning slider 20 is slidably connected to the connecting block 10; the first fixing component 30 is connected to the connecting block 10 and the fine-tuning slider 20, and is used to fix the relative position of the fine-tuning slider 20 and the connecting block 10; the first end of the connecting arm 40 is connected to the The second end of the fine-tuning slider 20 is rotatably connected; the second fixing assembly 50 is connected to the connecting arm 40 and the fine-tuning slider 20, and is used to fix the relative positions of the connecting arm 40 and the fine-tuning slider 20; the clamping arm 60 is rotatably connected to the second end of the connecting arm 40, and the clamping arm 60 has a clamping state for clamping the welding gun body 1 and a non-clamping state for allowing the welding gun body 1 to be disassembled and assembled; the third fixing assembly 70 is connected to the clamping arm 60 and the fine-tuning slider 20, and is used to fix the relative positions of the clamping arm 60 and the fine-tuning slider 20.

[0029] When using the welding fixture provided in the present application, the welding gun body 1 is clamped by using the clamping arm 60, and the relative position between the clamping arm 60 and the connecting arm 40 can be adjusted by rotating the clamping arm 60, and the relative position between the connecting arm 40 and the fine-tuning slider 20 can be adjusted by rotating the connecting arm 40, so that the angle between the welding gun body 1 and the workpiece to be welded can be conveniently adjusted; the relative position between the fine-tuning slider 20 and the connecting block 10 can be adjusted by sliding the fine-tuning slider 20, so that the arc starting height between the welding gun body 1 and the workpiece to be welded can be conveniently adjusted; after adjusting the desired state of the welding gun body 1, the relative position of the fine-tuning slider 20 and the connecting block 10 is fixed by the first fixing component 30, the relative position of the connecting arm 40 and the fine-tuning slider 20 is fixed by the second fixing component 50, and the relative position of the clamping arm 60 and the fine-tuning slider 20 is fixed by the third fixing component 70.

[0030] The welding fixture provided by the utility model can conveniently adjust the angle between the welding gun body 1 and the workpiece to be welded, and can conveniently fine-tune the arc starting height between the tungsten electrode of the welding gun body 1 and the workpiece to be welded.

[0031] Optionally, a fine-tuning slider 20, a group of first fixing components 30, a connecting arm 40, a group of second fixing components 50, a clamping arm 60 and a group of third fixing components 70 together form a clamping part, and the number of clamping parts can be increased according to actual use needs.

[0032] exist Figures 1 to 5 In an optional embodiment, the number of the clamping parts is 2; in an optional embodiment not shown in the present application, the number of the clamping parts is 1 or greater than or equal to 3.

[0033] At present, TIG high-efficiency welding is mainly based on increasing welding current or improving arc thermal efficiency, which inevitably brings problems such as welding gun heating, tungsten electrode burning, arc instability, etc. In order to reduce the problem of excessive current and welding gun overheating in single-gun TIG welding, double-gun TIG welding is often used in production.

[0034] The double-gun TIG welding fixture in the related art has the problem that the angle adjustment of the welding gun body 1 is cumbersome and the arc starting height of the welding gun body 1 cannot be achieved. For example, patent CN108971714A provides a double TIG high-speed welding process welding gun clamping device, which clamps the welding gun body through a clamping plate and a clamping plate buckle plate. When adjusting the relative position and posture of the welding gun body, it is necessary to replace the welding gun jacket, and when adjusting, it is also necessary to replace the ceramic nozzle jacket that matches the production for auxiliary clamping. Therefore, the device is cumbersome to operate when adjusting the relative position of the double welding gun body. In addition, according to embodiments 1 and 2 in patent CN108971714A, it can be known that the device needs to process the required ceramic nozzle jacket separately according to different welding gun position parameters. According to the actual situation analysis, in actual application, only specific welding gun nozzle jackets can be processed for specific welding gun position parameters, and it is impossible to achieve stepless adjustment of welding gun position parameters without replacing the welding gun nozzle jacket.

[0035] In order to solve the technical problems existing in the double-gun TIG welding fixture in the related technology, such as Figures 1 to 5 As shown, the utility model provides a double-gun TIG welding fixture, wherein two fine-tuning sliders 20 are symmetrically arranged on a connecting block 10; two groups of first fixing assemblies 30 are respectively used to fix the relative positions of the two fine-tuning sliders 20 and the connecting block 10; two connecting arms 40 are respectively connected to the two fine-tuning sliders 20 in a one-to-one correspondence; two groups of second fixing assemblies 50 are respectively used to fix the relative positions between the two connecting arms 40 and the two fine-tuning sliders 20; two clamping arms 60 are respectively connected to the two connecting arms 40 in a one-to-one correspondence; the two clamping arms 60 are respectively used to clamp two welding gun bodies 1; and two groups of third fixing assemblies 70 are respectively used to fix the relative positions between the two clamping arms 60 and the two connecting arms 40.

[0036] In this way, the angles between the two welding gun bodies 1 and the workpieces to be welded can be adjusted according to actual needs, or the arc starting heights between the two welding gun bodies 1 and the workpieces to be welded can be fine-tuned.

[0037] Optionally, by adjusting the relative position between the connecting arm 40 and the fine-tuning slider 20, or by adjusting the relative position between the clamping wrist 60 and the connecting arm 40, the angle between the two welding gun bodies 1 or the distance between the two tungsten electrodes of the two welding gun bodies 1 can be adjusted. In this way, the double-gun TIG welding fixture provided by the present application can not only adjust the angles between the two welding gun bodies 1 and the workpieces to be welded, but also adjust the angle between the two welding gun bodies 1, and can also adjust the distance between the two tungsten electrodes of the two welding gun bodies 1, and has a wider range of applications.

[0038] Optionally, the arc starting height between the tungsten electrodes of the two welding gun bodies 1 and the workpiece to be welded can be fine-tuned by adjusting the relative position between the fine-tuning slider 20 and the connecting block 10. In this way, the problem of different arc lengths of the two guns due to inaccurate height adjustment of the two welding gun bodies 1 can be avoided.

[0039] The utility model adopts a self-designed double-arm variable angle clamping method. When using the double-gun TIG welding fixture provided by the utility model, the clamping effect of the arm on the welding gun body 1 during manual welding can be simulated by rotating the two connecting arms 40; each welding gun body 1 has an independent connecting arm 40, and each connecting arm 40 can independently adjust the welding gun body 1 with a high degree of freedom. The advantage of this clamping method is that when adjusting, it is only necessary to adjust the welding gun body 1 to the desired position and tighten the corresponding fixing assembly to complete the clamping operation of the welding gun body 1; secondly, the utility model can adjust the position of the welding gun by rotating the connecting arm 40, and can achieve stepless adjustment of the position parameters of the welding gun body 1. In addition, the utility model also has a fine-tuning function, which can fine-tune the arc starting heights of the two welding gun bodies 1 respectively, avoiding the problem of different arc lengths of the two guns due to inaccurate height adjustment of the two welding gun bodies 1.

[0040] Optionally, each clamping arm 60 can rotate 360° relative to the corresponding connecting arm 40. In this way, the clamping arm 60 can drive the welding gun body 1 to rotate infinitely to any desired angle.

[0041] Optionally, the second ends of the two connecting arms 40 have a first limit position closest to each other and a second limit position farthest from each other; the second ends of the two connecting arms 40 can swing between their first limit position and the second limit position, respectively, and the swingable angle of the second ends of the two connecting arms 40 is greater than 0° and less than 90°. Considering the adjustable range of the angle between the two welding gun bodies 1 during double-gun welding, and considering the angle between the two welding gun bodies 1 and the workpiece to be welded during double-gun welding, the swing angle range of the two connecting arms 40 is set within the above numerical range.

[0042] Optionally, the adjustable range of the angle between the two welding gun bodies 1 is 30° to 120°. Limiting the adjustable range of the angle between the two welding gun bodies 1 within the above numerical range can avoid mutual interference between the two welding gun bodies 1 and can also meet the current adjustment requirements of the angle between the two welding gun bodies 1 during double-gun TIG welding.

[0043] Optionally, the adjustable range of the distance between the two tungsten electrodes of the two welding gun bodies 1 is 0.1 mm to 50 mm. When the adjustable range of the distance between the two tungsten electrodes of the two welding gun bodies 1 is limited to the above numerical range, mutual interference between the two welding gun bodies 1 can be avoided, and the adjustment requirements of the angle between the two welding gun bodies 1 during the current double-gun TIG welding can also be met.

[0044] Alternatively, if Figure 3 As shown, the connection block 10 has a slide groove 11 with an opening at the lower end surface, and a clearance hole 12 connected to the slide groove 11 is provided on the upper end surface of the connection block 10; the first end of the fine-tuning slider 20 has a sliding portion 21, and the sliding portion 21 is slidably connected to the slide groove 11; the top of the sliding portion 21 has a first threaded hole 211; the first fixing component 30 includes a first fixing member 31, and the first fixing member 31 includes a connected screw 311 and a head 312, and the screw 311 passes through the clearance hole 12 and is threadedly connected to the first threaded hole 211, and the lower surface of the head 312 is in contact with the upper surface of the connection block 10. In this way, the first fixing member 31 can be used to fix the relative position between the fine-tuning slider 20 and the connection block 10 in the vertical direction. When it is necessary to fine-tune the arc starting height, it is only necessary to rotate the first fixing member 31, and the adjustment is convenient and efficient.

[0045] Optionally, the first fixing member 31 is a bolt or a screw, and the specific specifications can be rotated according to actual needs.

[0046] Optionally, the pitch of the screw rod 311 may be selected according to the fine-tuning accuracy.

[0047] Alternatively, if Figure 3 As shown, the side wall of the connecting block 10 has a second threaded hole 13 connected to the slide groove 11; the first fixing assembly 30 also includes a second fixing member 32, and the second fixing member 32 has an external thread structure adapted to the second threaded hole 13; when the second fixing member 32 is in a loose state, the relative position of the fine-tuning slider 20 and the connecting block 10 can be adjusted by rotating the first fixing member 31; when the second fixing member 32 is threadedly connected to the second threaded hole 13 and is in a locked state abutting against the sliding part 21, the sliding part 21 abuts against the inner wall of the slide groove 11, and the relative position of the fine-tuning slider 20 and the connecting block 10 is fixed. In this way,

[0048] Optionally, the number of the second fixing members 32 can be selected according to actual needs.

[0049] In this application Figures 1 to 5 In an optional embodiment, each fine-tuning slider 20 is correspondingly provided with four second fixing members 32 .

[0050] Optionally, the second fixing member 32 is a bolt or a screw, and the specific specifications can be rotated according to actual needs.

[0051] Alternatively, if Figures 1 to 5 As shown, the second end of the fine-tuning slider 20 has a first circular mounting hole 221, and the first end of the connecting arm 40 has a second circular mounting hole; the second fixing assembly 50 includes a first bolt 51 and a first nut 52, and the first bolt 51 passes through the first mounting hole 221 and the second mounting hole in sequence and is threadedly connected with the first nut 52; the second end of the fine-tuning slider 20 also has a third arc-shaped mounting hole 222, and the first end of the connecting arm 40 also has a fourth circular mounting hole located below the second mounting hole; the second fixing assembly 50 also includes a second bolt 53 and a second nut 54, and the second bolt 53 passes through the third mounting hole 222 and the fourth mounting hole and then the second nut 54 is threadedly connected; when the first bolt 51 and the first nut 52 are in a loosened state, and the second bolt 53 and the second nut 54 are in a loosened state, the connecting arm 40 can rotate relative to the fine-tuning slider 20 with the axis of the second mounting hole as the center, and the second bolt 53 can slide in the slideway formed by the third mounting hole 222 as the connecting arm 40 rotates; when the first bolt 51 and the first nut 52 are in a locked state, and the second bolt 53 and the second nut 54 are in a locked state, friction is generated between the connecting arm 40 and the fine-tuning slider 20, and the relative position between the connecting arm 40 and the fine-tuning slider 20 is fixed. In this way, the relative position between the connecting arm 40 and the fine-tuning slider 20 is adjusted conveniently and quickly, and the connecting arm 40 can drive the clamping wrist 60 and the welding gun body 1 to rotate synchronously to achieve the position adjustment of the welding gun body 1.

[0052] Alternatively, if Figures 1 to 5 As shown, the first end of the fine-tuning slider 20 includes a sliding portion 21 arranged in a rectangular parallelepiped. In this way, the sliding and fixing of the fine-tuning slider 20 are facilitated.

[0053] Alternatively, if Figures 1 to 5 As shown, the second end of the fine-tuning slider 20 includes a connecting portion 22 arranged in a fan shape. In this way, it is convenient to arrange the first circular mounting hole 221 and the third arc-shaped mounting hole 222.

[0054] Alternatively, if Figures 1 to 5As shown, the two connecting parts 22 are in the shape of a right-angled sector, the arc edge of the right-angled sector is located on the outside, the vertex of the right-angled sector is located on the inside, the first right-angled side of the right-angled sector extends in the horizontal direction, the second right-angled side extends in the vertical direction, and the arc edge is located below the first right-angled side. Such a shape setting facilitates the installation of the two fine-tuning sliders 20 on the connecting block 10, avoids the two fine-tuning sliders 20 from interfering with each other, has a simple and reasonable structure, and has a low production cost.

[0055] Alternatively, if Figure 1 and Figure 2 As shown, the second end of the connecting arm 40 has a rotating hole, and the side of the connecting arm 40 is provided with a plurality of third threaded holes 41 connected with the rotating hole; the clamping arm 60 includes a rotating shaft 61, and the rotating shaft 61 is rotatably arranged in the rotating hole; the third fixing assembly 70 includes a plurality of third fixing members 71 corresponding to the plurality of third threaded holes 41, and each third fixing member 71 has an external thread structure adapted to each third threaded hole 41; when each third fixing member 71 is in a loose state, the relative position of the clamping arm 60 and the connecting arm 40 can be adjusted by rotating the rotating shaft 61; when each third fixing member 71 is threadedly connected to each third threaded hole 41 corresponding to each other and is in a locking state abutting against the rotating shaft 61, the relative position of the clamping arm 60 and the connecting arm 40 is fixed. In this way, the relative position between the clamping arm 60 and the connecting arm 40 is adjusted conveniently and quickly, and the clamping arm 60 can drive the welding gun body 1 to rotate synchronously to achieve the position adjustment of the welding gun body 1.

[0056] Alternatively, if Figure 1 and Figure 2 As shown, the clamping arm 60 includes an annular wall 62, a third bolt 63 and a third nut 64. The annular wall 62 forms a receiving space for receiving the welding gun body 1. The front end of the annular wall 62 has a notch 621. Two extension ends 622 are provided on both sides of the notch 621. The centers of the two extension ends 622 each have a through hole 623. The third bolt 63 passes through the two through holes 623 and is threadedly connected with the third nut 64. When the third bolt 63 and the third nut 64 are in a loose state, the clamping arm 60 is in a non-clamping state, and the welding gun body 1 can be placed in the receiving space or taken out of the receiving space. When the third bolt 63 and the third nut 64 are in a locked state, the clamping arm 60 is in a clamping state, and the annular wall 62 undergoes elastic deformation to clamp the welding gun body 1. In this way, the welding gun body 1 can be easily disassembled and assembled, and can be applied to welding gun bodies 1 of different specifications, models and sizes.

[0057] Alternatively, if Figures 1 to 5As shown, the welding fixture also includes a flange 80, a fourth bolt 90 and a fourth nut 100. The flange 80 has a first connection hole, and the connecting block 10 is provided with a second connection hole. The fourth bolt 90 passes through the first connection hole and the second connection hole and is threadedly connected with the fourth nut 100 to fix the flange 80 with the connecting block 10. The flange 80 also has a third connection hole 81 for connecting with a robot arm to achieve automatic welding. In this way, the flange 80 can be connected to the robot arm through the third connection hole 81 and the fastener, and the robot arm is used to drive the welding fixture and the welding gun body 1 to move synchronously to achieve automatic welding.

[0058] The quantity and specifications of the screw and bolt assemblies can be selected according to actual needs.

[0059] Optionally, the first fixing member 31 is an M8 screw; the second fixing member 32 is an M6×15 hexagon socket screw; the third fixing member 71 is an M6×10 hexagon socket screw; the first bolt 51 and the first nut 52 are M8×30 ​​hexagon socket bolt and nut assemblies, the second bolt 53 and the second nut 54 are M8×30 ​​hexagon socket bolt and nut assemblies, the third bolt 63 and the third nut 64 are M6×30 hexagon socket bolt and nut assemblies, and the fourth bolt 90 and the fourth nut 100 are M8×40 hexagon socket bolt assemblies.

[0060] The preferred embodiment of the present application provides a double-arm variable-angle dual TIG welding gun clamping device for clamping two welding gun bodies 1 to solve the problems of cumbersome operation of the clamp in the related art when adjusting the relative positions of the dual welding guns, lack of dual-gun clamps, and inability to conduct experimental research.

[0061] like Figures 1 to 5As shown, this embodiment is a double-gun TIG welding fixture, which is used to clamp two welding gun bodies 1, including a connecting block 10, two fine-tuning sliders 20, two connecting arms 40 and two clamping arms 60. The front end of each clamping arm 60 has an annular wall 62 for clamping the welding gun body 1, the front end of the annular wall 62 has a notch 621, the outer side of the notch 621 has an extended end 622, and the center of the extended end 622 has a through hole 623; the through hole 623 cooperates with the bolt to deform the annular wall to clamp the welding gun body 1; the rear end of each clamping arm 60 has a rotating shaft 61, The connecting arm 40 is connected to the connecting arm 40; the lower sides of the two connecting arms 40 have a rotating hole for connecting the clamping arm 60, and the two rotating shafts 61 are respectively placed in the rotating holes on the lower sides of the two connecting arms 40. The side walls of the rotating holes have a third threaded hole 41, and the clamping arm 60 can be fixed by screwing in a screw; the upper side of the connecting arm 40 has two longitudinally arranged through holes, namely the second mounting hole and the fourth mounting hole; the lower end of the fine-tuning slider 20 is fan-shaped, with a through hole and a slideway, namely the first mounting hole and the third mounting hole, for connecting the connecting arm 40; the second mounting hole on the upper side of the connecting arm 40 The first mounting hole at the lower end of the fine-tuning slider 20 is connected by bolts to play a positioning role; the fourth mounting hole on the upper side of the connecting arm 40 is connected to the lower slideway of the fine-tuning slider by bolts. After the bolts are tightened, friction is generated between the connecting arm 40 and the fine-tuning slider 20 to play a tightening role; the upper end of the fine-tuning slider 20 has a slide rod, that is, a sliding part 21, and the bottom of the connecting block 10 has two slide grooves 11 with lower openings. The slide rods of the two fine-tuning sliders 20 are respectively placed in the two slide grooves 11 of the connecting block 10, and the top of the slide rod has a first threaded hole 211. Each slide groove 1 The center of the upper side is provided with a clearance hole 12, through which a screw can be screwed in to fine-tune the fine-tuning slider 20, and the side walls of the slide groove 11 are provided with a second threaded hole 13 for fastening the fine-tuning slider 20; the upper side of the connecting block 10 is provided with a connecting end connected to the flange 80, and the upper end of the connecting block 10 is provided with a first connecting hole for connecting to the flange 80; both sides of the flange 80 are provided with connecting holes, namely, the second connecting hole and the third connecting hole, which are respectively used to connect the connecting block 10 and the robot arm; the flange 80 is a universal flange and can be applied to automatic welding.

[0062] The utility model also includes:

[0063] Various general types of screws and bolts corresponding to the hole positions;

[0064] Specific models and quantities include:

[0065] 3 sets of M8×40 hexagon socket bolts, 4 sets of M8×30 ​​hexagon socket bolts, 2 pieces of M8×30 ​​hexagon socket screws, 8 pieces of M6×15 hexagon socket screws, 2 sets of M6×30 hexagon socket bolts, 2 pieces of M6×10 hexagon socket screws, and 2 pieces of M8 screws.

[0066] The specific implementation of the utility model is:

[0067] When the utility model is in use, the flange 80 is connected to the welding robot arm through the hole position, that is, the third connection hole; the connecting block 10 is fixed to the flange 80 by three sets of M8×40 hexagon socket bolts;

[0068] The two fine-tuning sliders 20 are respectively inserted into the two slide grooves 11 inside the connecting block 10, and are respectively fine-tuned and fixed in the vertical direction by two M8 screws; after fine-tuning to a suitable position, eight M6 screws are screwed into the second threaded holes 13 on the side wall of the connecting block 10 to fix the fine-tuning sliders 20 in the horizontal direction;

[0069] The two connecting arms 40 are respectively fastened to the two fine-tuning slide blocks 20 by two sets of M8×30 ​​bolts;

[0070] The rear rotation shafts 61 of the two clamping arms 60 are inserted into the rotation holes at the lower side of the connecting arm 40, and can be rotated 360° in the holes. When adjusted to a suitable position, two M5×10 screws are respectively screwed into the third threaded holes 41 on the side walls of the rotation holes at the lower side of the connecting arm 40, and the clamping arms 60 are fixed in the rotation holes of the connecting arm 40 by applying pressure to the rear rotation shafts 61 of the clamping arms 60;

[0071] The two welding gun bodies 1 are screwed into the annular wall 62 of the clamping arm 60 from the gun head portion, and the annular wall 62 of the clamping arm 60 is elastically deformed by two sets of M6×30 bolts, thereby connecting the welding gun bodies 1 to the double-gun TIG welding fixture.

[0072] In order to be applied to specific welding experiments, the utility model should be able to fix the welding gun body 1 at any angle, and the specific adjustment method is as follows:

[0073] Loosen the fastening bolts between the fine-tuning slider 20 and the connecting arm 40, and then loosen the fastening screws between the connecting arm 40 and the clamping arm 60. At this time, the angle and spacing between the two welding gun bodies 1 can be adjusted in the vertical plane. After the adjustment is completed, tighten the above-mentioned bolts and screws to fix the welding gun body 1.

[0074] The utility model controls the angle between the two welding gun bodies 1 in a range of 30° to 120°, with a minimum angle of 30°. Figure 4 As shown, the maximum angle is 120°. Figure 5 As shown, the welding gun angle range required for double TIG welding is met.

[0075] In double-gun TIG welding, the arc starting height requirement between the tungsten electrode in the welding gun body 1 and the workpiece to be welded is relatively strict. When the position of the welding gun body 1 is adjusted, there will be a height difference in the vertical direction, which is difficult to control and causes arc starting difficulties. The utility model solves this problem in the following way.

[0076] When there is a height difference, loosen the side wall screws of the connecting block 10. At this time, the two fine-tuning sliders 20 can be fine-tuned in the vertical direction by rotating the upper suspension screws. The fine-tuning function is implemented as follows: Figure 3 As shown, M8 threaded holes are tapped on the top of the two fine-tuning sliders 20, and a clearance hole 12 is opened on the upper wall of the connecting block 10. The suspension screws are screwed into the two fine-tuning sliders 20 from above. When the suspension screws rotate, the two fine-tuning sliders 20 will be fine-tuned in the vertical direction. After the fine-tuning is completed, tighten the screws on the side walls of the fine-tuning sliders 20 to complete the fine-tuning of the welding gun in the vertical direction.

[0077] The beneficial effects of the utility model include at least:

[0078] The utility model adopts a self-designed double-arm variable angle clamping method, which simulates the clamping effect of the arm on the welding gun during manual welding by rotating the double connecting arms. In the utility model, each welding gun has an independent connecting arm, and each connecting arm can independently adjust the welding gun with a high degree of freedom. The advantage of this clamping method is that when adjusting, it is only necessary to adjust the welding gun to the desired position and tighten the corresponding fastening bolt to complete the clamping operation of the welding gun; secondly, the utility model adjusts the position of the welding gun by rotating the connecting arm, which can achieve stepless adjustment of the position parameters of the welding gun. In addition, the utility model also has a fine-tuning function, which can fine-tune the arc starting height of the welding gun to avoid the problem of different arc lengths of the two guns due to inaccurate height adjustment of the welding gun.

[0079] The utility model has a reasonable structural design. The angle of the welding gun is adjusted through the through hole and the fastening bolt, and the position of the welding gun body 1 is fine-tuned through the slide groove and the slide rod, which is conducive to the angle adjustment of the welding gun during double-gun TIG welding and plays a key role in the double-gun TIG welding experiment.

[0080] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

[0081] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present invention should be the common meanings understood by the technicians in the field to which the present invention belongs. In this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Terms such as "connection" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A welding fixture, characterized in that: Used to clamp a welding gun body (1), the welding fixture comprises: Connecting block (10); A fine-tuning slider (20), wherein a first end of the fine-tuning slider (20) is slidably connected to the connecting block (10); a first fixing component (30), the first fixing component (30) being connected to the connecting block (10) and the fine-tuning slider (20) and being used for fixing the relative position of the fine-tuning slider (20) and the connecting block (10); A connecting arm (40), wherein a first end of the connecting arm (40) is rotatably connected to a second end of the fine-tuning slider (20); a second fixing component (50), the second fixing component (50) being connected to the connecting arm (40) and the fine-tuning slider (20) and being used for fixing the relative position of the connecting arm (40) and the fine-tuning slider (20); A clamping arm (60), the clamping arm (60) being rotatably connected to the second end of the connecting arm (40), the clamping arm (60) having a clamping state for clamping the welding gun body (1) and a non-clamping state for allowing the welding gun body (1) to be disassembled; A third fixing component (70) is connected to the clamping arm (60) and the fine-tuning slider (20) and is used to fix the relative position of the clamping arm (60) and the fine-tuning slider (20).

2. The welding fixture according to claim 1, characterized in that: The welding fixture is a double-gun TIG welding fixture; The two fine-tuning sliders (20) are symmetrically arranged on the connecting block (10); the two groups of the first fixing components (30) are respectively used to fix the relative positions of the two fine-tuning sliders (20) and the connecting block (10); The two connecting arms (40) are respectively connected to the two fine-tuning slide blocks (20) in a one-to-one correspondence; the two sets of the second fixing components (50) are respectively used to fix the relative positions between the two connecting arms (40) and the two fine-tuning slide blocks (20); The two clamping arms (60) are respectively connected to the two connecting arms (40) in a one-to-one correspondence; the two clamping arms (60) are respectively used to clamp the two welding gun bodies (1); and the two groups of third fixing assemblies (70) are respectively used to fix the relative positions between the two clamping arms (60) and the two connecting arms (40).

3. The welding fixture according to claim 2, characterized in that: By adjusting the relative position between the connecting arm (40) and the fine-tuning slider (20), or by adjusting the relative position between the clamping arm (60) and the connecting arm (40), the included angle between the two welding gun bodies (1) or the distance between the two tungsten electrodes of the two welding gun bodies (1) can be adjusted; by adjusting the relative position between the fine-tuning slider (20) and the connecting block (10), the arc starting height between the tungsten electrodes of the two welding gun bodies (1) and the workpiece to be welded can be fine-tuned.

4. The welding fixture according to claim 2, characterized in that: Each clamping arm (60) can rotate 360 ​​degrees relative to the corresponding connecting arm (40); The second ends of the two connecting arms (40) have a first extreme position that is closest to each other and a second extreme position that is farthest from each other; the second ends of the two connecting arms (40) can swing between the first extreme position and the second extreme position respectively, and the swingable angle of the second ends of the two connecting arms (40) is greater than 0° and less than 90°; The adjustable range of the included angle between the two welding gun bodies (1) is 30° to 120°; the adjustable range of the distance between the two tungsten poles of the two welding gun bodies (1) is 0.1 mm to 50 mm.

5. The welding fixture according to claim 1, characterized in that: The connecting block (10) has a slide groove (11) with an opening at the lower end surface, and the upper end surface of the connecting block (10) is provided with a clearance hole (12) connected to the slide groove (11); the first end of the fine-tuning slider (20) has a sliding portion (21), and the sliding portion (21) is slidably connected to the slide groove (11); the top of the sliding portion (21) has a first threaded hole (211); the first fixing component (30) includes a first fixing member (31), and the first fixing member (31) includes a connected screw rod (311) and a head (312), and the screw rod (311) is threadedly connected to the first threaded hole (211) after passing through the clearance hole (12), and the lower surface of the head (312) is in contact with the upper surface of the connecting block (10); The side wall of the connecting block (10) has a second threaded hole (13) connected to the slide groove (11); the first fixing assembly (30) also includes a second fixing member (32), and the second fixing member (32) has an external thread structure adapted to the second threaded hole (13); When the second fixing member (32) is in a loosened state, the relative position of the fine-tuning slider (20) and the connecting block (10) can be adjusted by rotating the first fixing member (31); When the second fixing member (32) is threadedly connected to the second threaded hole (13) and is in a locked state abutting against the sliding portion (21), the sliding portion (21) abuts against the inner wall of the sliding groove (11), and the relative positions of the fine-tuning slider (20) and the connecting block (10) are fixed.

6. The welding fixture according to claim 1, characterized in that: The second end of the fine-tuning slider (20) has a circular first mounting hole (221), and the first end of the connecting arm (40) has a circular second mounting hole; the second fixing assembly (50) comprises a first bolt (51) and a first nut (52), and the first bolt (51) passes through the first mounting hole (221) and the second mounting hole in sequence and is threadedly connected to the first nut (52); The second end of the fine-tuning slider (20) also has a third mounting hole (222) in the shape of an arc, and the first end of the connecting arm (40) also has a fourth mounting hole in the shape of a circle located below the second mounting hole; the second fixing assembly (50) also includes a second bolt (53) and a second nut (54), and the second bolt (53) is threadedly connected to the second nut (54) after passing through the third mounting hole (222) and the fourth mounting hole; When the first bolt (51) and the first nut (52) are in a loosened state, and the second bolt (53) and the second nut (54) are in a loosened state, the connecting arm (40) can rotate relative to the fine-tuning slider (20) around the axis of the second mounting hole, and the second bolt (53) can slide in the slideway formed by the third mounting hole (222) as the connecting arm (40) rotates; When the first bolt (51) and the first nut (52) are in a locked state, and the second bolt (53) and the second nut (54) are in a locked state, friction is generated between the connecting arm (40) and the fine-tuning slider (20), and the relative position between the connecting arm (40) and the fine-tuning slider (20) is fixed.

7. The welding fixture according to any one of claims 1 to 6, characterized in that: The first end of the fine-tuning slider (20) comprises a sliding portion (21) arranged in a rectangular parallelepiped, and the second end of the fine-tuning slider (20) comprises a connecting portion (22) arranged in a fan shape.

8. The welding fixture according to claim 1, characterized in that: The second end of the connecting arm (40) has a rotating hole, and the side surface of the connecting arm (40) is provided with a plurality of third threaded holes (41) connected to the rotating hole; the clamping arm (60) includes a rotating shaft (61), and the rotating shaft (61) is rotatably arranged in the rotating hole; the third fixing assembly (70) includes a plurality of third fixing members (71) corresponding to the plurality of third threaded holes (41) one by one, and each of the third fixing members (71) has an external thread structure adapted to each of the third threaded holes (41); When each of the third fixing members (71) is in a loosened state, the relative position of the clamping arm (60) and the connecting arm (40) can be adjusted by rotating the rotating shaft (61); When each of the third fixing members (71) is threadedly connected to each of the third threaded holes (41) in a one-to-one correspondence and is in a locked state abutting against the rotating shaft (61), the relative positions of the clamping arm (60) and the connecting arm (40) are fixed.

9. The welding fixture according to claim 1, characterized in that: The clamping arm (60) comprises an annular wall (62), a third bolt (63) and a third nut (64); the annular wall (62) forms a receiving space for receiving the welding gun body (1); the front end of the annular wall (62) has a notch (621); two sides of the notch (621) have two extended ends (622); the centers of the two extended ends (622) respectively have a through hole (623); the third bolt (63) passes through the two through holes (623) and is threadedly connected to the third nut (64); When the third bolt (63) and the third nut (64) are in a loosened state, the clamping arm (60) is in the non-clamping state, and the welding gun body (1) can be placed in the accommodating space or taken out of the accommodating space; When the third bolt (63) and the third nut (64) are in a locked state, the clamping arm (60) is in the clamping state, and the annular wall (62) undergoes elastic deformation to clamp the welding gun body (1).

10. The welding fixture according to claim 1, characterized in that: The welding fixture further comprises a flange (80), a fourth bolt (90) and a fourth nut (100), wherein the flange (80) has a first connection hole, the connection block (10) is provided with a second connection hole, and the fourth bolt (90) passes through the first connection hole and the second connection hole and is threadedly connected to the fourth nut (100) to fix the flange (80) to the connection block (10); The flange (80) also has a third connection hole (81) for connecting to a robot arm to achieve automated welding.

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