A welding aid and method of use

Abstract

The present application relates to a kind of welding auxiliary device and using method, welding auxiliary device includes two welding pads, also include first support and second support, the first support is installed on second support by lifting structure, two the welding pad is installed on first support, the first support is configured to the structure that two the welding pad is relatively adjusted relative spacing on horizontal plane, when welding, the bottom of second support is positioned with welding reference surface contact and makes two the welding pad clamping in the two ends of welding base material joint.The present application is convenient according to welding base material and is fixed and adjusted, is favorable to promote welding quality and welding efficiency, reduce production cost.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of welding, in particular to a welding auxiliary device and a using method thereof. BACKGROUND

[0002] In the welding manufacturing of a vehicle body, there are a large number of joints with two ends suspended and no support to be welded, which have different lengths and sizes. The characteristics of such joints are short welds, two ends in a suspended state, and various combinations of plate thicknesses of two base materials. When welding such joints, welding defects such as welding collapse, incomplete fusion, and welding bumps are prone to occur. In addition, under special requirements, the end of the weld is generally welded with a head seal.

[0003] The currently used methods are as follows: the first method is to repair the welding defects at both ends of the weld after the formal weld is welded, and to weld the head seal after the defects are cleaned. This method has the problems of increased welding difficulty, increased probability of welding defects, reduced production efficiency due to excessive time consumption for defect repair, and increased production cost. The second method is to place welding pads for auxiliary welding at both ends of the joint weld for welding. This method has the problem of inconvenient operation, and the welding pads need to be fixed with clamping tools. In addition, it is difficult to adjust the gap between the welding pads and the base material. The size of the welding pads needs to meet certain requirements, and when the working surface does not meet the use requirements, the welding pads need to be completely scrapped, which increases the production cost and also has the problem of low production efficiency. SUMMARY

[0004] The technical problem solved by the present application is to provide a welding auxiliary device that is convenient to fix and adjust according to the welding base material, is conducive to improving the welding quality and welding efficiency, and reduces the production cost, and to provide a using method of the welding auxiliary device.

[0005] To solve the above technical problems, the basic concept of the first technical solution of the present application is as follows:

[0006] A welding auxiliary device includes two welding pads, a first support, and a second support. The first support is installed on the second support through a lifting structure. The two welding pads are installed on the first support. The first support is configured to adjust the relative distance between the two welding pads in the horizontal plane. During welding, the second support is in contact with the welding reference surface and the two welding pads are clamped on both ends of the welding base material joint.

[0007] Further, the cross section of the first support is in the shape of a "J" or C, which forms a space for accommodating the welding base material. During welding, the first support is connected above the welding base material.

[0008] Further, the first support comprises a fixed support and a movable support, the movable support is connected with the fixed support through a horizontal moving mechanism, one of the welding pads is fixed on the fixed support and the other is fixed on the movable support, the distance between the two welding pads is adjusted by adjusting the relative installation position between the fixed support and the movable support.

[0009] Further, the horizontal moving mechanism comprises a first long circular hole and a first fastener, which are arranged correspondingly on the fixed support and the movable support and extend along the moving direction, the first fastener is fixed through the first long circular hole.

[0010] Further, the fixed support and the movable support each comprise a connecting part and an extending part, the cross section of the connecting part is Z-shaped or C-shaped, the extending part is formed by the horizontal plane of the bottom of the connecting part extending outward, the welding pad is fixed on the extending part, the connecting parts of the fixed support and the movable support are connected through the horizontal moving mechanism and form a space for accommodating the welding base material after being connected.

[0011] Further, the welding pad is flush with the inner side surface of the fixed support and the movable support in the vertical direction after being installed.

[0012] Further, the first support has a baffle protruding upward at one end, the second support has at least a vertical surface perpendicular to the surface of the welding base material, the baffle is tightly attached to the vertical surface of the second support and is lifted and lowered through a lifting structure.

[0013] Further, the lifting structure comprises a second long circular hole and a second fastener, which are arranged correspondingly on the baffle and the second support and extend along the moving direction, the second fastener is fixed through the second long circular hole.

[0014] Further, the bottom of the vertical surface of the second support horizontally extends to one side or both sides to form a positioning surface, the positioning surface is attached to the welding reference surface during welding to realize vertical positioning.

[0015] The basic concept of the second technical solution adopted by the present application is:

[0016] A method for using the welding auxiliary device as described above, comprising:

[0017] Step 1, fixing the required welding pads on the first support;

[0018] Step 2, placing the first support and the second support on the welding base material, and adjusting the distance between the two welding pads according to the size of the welding base material, so that the two welding pads are clamped at both ends of the welding base material joint and are attached to the end surface of the welding base material joint;

[0019] Step 3, adjust the relative height position of the first support and the second support, so that the bottom of the second support is in contact with the surface of the welding base material to realize vertical positioning, and the distance between the upper surface of the welding pad and the welding reference surface is the set vertical distance;

[0020] Step 4, place the welding gun at the welding base material joint, and complete the joint welding according to the set welding track.

[0021] In summary, the welding auxiliary device and the use method provided by the present application have the following advantages compared with the prior art:

[0022] (1) The present application can flexibly adjust the up-down and left-right spacing size of the welding pad according to the different state requirements of the welding joint, and the gap between the welding pad and the welding base material can be adjusted at will according to requirements, so that the welding pad is always in the best state to meet the welding requirements, which meets the welding requirements, solves the welding quality problem existing at both ends of the fillet weld of the welding joint in the welding manufacturing process of the railway car body, is beneficial to improving the welding quality, and at the same time saves the repeated operation time, and greatly improves the welding efficiency.

[0023] (2) The present application can save the cost of welding quality problem repair and consumable use.

[0024] (3) The present application can replace the welding pad material according to different welding materials, such as replacing carbon steel, stainless steel, copper, ceramic and other different materials, so that the welding pad can be replaced at any time after being worn out, and the disassembly and assembly are very convenient, and other main body structures can be used for a long time, and the device has strong universality.

[0025] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the schematic embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the accompanying drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0027] In the drawings:

[0028] Figure 1 is a structural diagram of the auxiliary device of the present application Figure 1 ;

[0029] Figure 2 is an exploded view of the auxiliary device of the present application;

[0030] Figure 3 is a schematic diagram of the lap joint welding path of the present application;

[0031] Figure 4 Figure is a schematic diagram of the T-shaped joint installation of the present application.

[0032] Figure: welding base material 1, weld 2, welding pad 3, first mounting hole 31;

[0033] First support 4, fixed support 41, connecting part 411, extension part 412, movable support 42, connecting part 421, extension part 422, second mounting hole 43, baffle 44;

[0034] Second support 5, vertical surface 51, positioning surface 52;

[0035] Lifting structure 6, second long circular hole 61, second stud 62, second butterfly nut 63;

[0036] Horizontal movement mechanism 7, first long circular hole 71, first stud 72, first butterfly nut 73;

[0037] Horizontal guide structure 8, guide long circular hole 81, guide stud 82;

[0038] Lifting guide structure 9, guide long circular hole 91, guide stud 92;

[0039] Welding gun 10.

[0040] It should be noted that the drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0042] In the description of the present application, it should be noted that the terms “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Example 1:

[0045] like Figures 1 to 4 As shown, this embodiment provides a welding auxiliary device, mainly used for welding the weld 2 at the joint of two welding base materials 1. For example... Figure 3 The image shows the weld seam of a lap joint, as shown. Figure 4 The image shows a T-shaped joint weld, which can also be used for L-shaped joint welds.

[0046] The welding auxiliary device includes two welding pads 3. The welding pads 3 are located at both ends of the welding joint of the base material 1 during welding. When the two welding pads 3 are welded to the beginning and end of the welding joint, the welding gap requirements must be met in both the horizontal and vertical directions, so that the welding pads 3 are always in the welding auxiliary state that meets the requirements.

[0047] The main function of welding pad 3 is to support the molten weld metal under the action of the electric arc during welding, preventing it from collapsing and flowing freely, and to form a weld of a certain shape after cooling. The material of the welding pad can be stainless steel, copper, ceramic, etc., depending on the welding requirements.

[0048] When welding the two welding pads 3 to the starting and ending ends of the welding joint, a gap-free fit is required in the horizontal direction, and the gap in the vertical direction meets the welding standard requirements. This vertical gap can be 0, that is, the upper surface of the welding pad 3 is flush with the upper surface of the welding base material 1 at the joint, or the vertical gap is greater than 0, that is, the upper surface of the welding pad 3 is lower than the upper surface of the welding base material 1 at the joint. The value of the vertical gap depends on the welding requirements of the welding base material 1.

[0049] In the embodiment, the welding auxiliary device comprises a first support 4 and a second support 5, the first support 4 is installed on the second support 5 through a lifting structure 6, two welding pads 3 are installed on the first support 4, the first support 4 is configured to adjust the relative spacing of the two welding pads 3 in the horizontal plane, the bottom of the second support 5 is in contact with the welding reference surface to realize the positioning in the vertical direction during welding, that is, to realize the adjustment of the vertical gap between the upper surface of the welding pad 3 and the upper surface of the joint of the welding base material 1, the spacing between the two welding pads 3 is adjusted, so that the two welding pads 3 are clamped at both ends of the joint of the welding base material 1, and the different welding gap requirements are met. The welding reference surface can be the upper surface of the welding base material 1, such as the lap joint shown in Figure 3 and the T-shaped joint shown in Figure 4 For the L-shaped joint, the welding reference surface is the welding table surface for placing the welding base material.

[0050] As shown in Figure 1 and Figure 2 In the embodiment, the cross section of the first support 4 is preferably "J" shaped, and has a space for accommodating the welding base material, and the first support 4 is crossed above the welding base material 1 during welding. This structure facilitates the cooperation of the welding auxiliary device as a whole with the welding base material 1, and facilitates the disassembly and assembly of the device.

[0051] In the embodiment, the first support 4 comprises a fixed support 41 and a movable support 42, the movable support 42 is connected with the fixed support 41 through a horizontal moving mechanism 7, one welding pad 3 is fixed on the fixed support 41 and the movable support 42 respectively, the fixed support 41 is connected with the second support 5 through the lifting structure 6, and the movable support 42 can also be connected with the second support 5 through the lifting structure 6. In this structure, the spacing between the two welding pads 3 can be adjusted by adjusting the relative installation position of the fixed support 41 and the movable support 42 in the horizontal direction, so as to meet the length requirement of the welding seam, which is inconvenient to adjust, simple and convenient, easy to control the adjustment accuracy, and conducive to improving the welding quality and welding efficiency.

[0052] In the embodiment, the fixed support 41 comprises a connecting portion 411 and a protruding portion 412, the movable support 42 also comprises a connecting portion 421 and a protruding portion 422, the cross sections of the connecting portion 411 and the connecting portion 421 are both Z-shaped, the protruding portion 412 is formed by outwardly protruding from the horizontal surface at the bottom of the connecting portion 411 (that is, protruding in the axial direction perpendicular to the horizontal moving direction), the protruding portion 422 is formed by outwardly protruding from the horizontal surface at the bottom of the connecting portion 421, the protruding portion 412 and the protruding portion 422 are flat plate structures, and one welding pad 3 is fixedly installed on the protruding portion 412 and the protruding portion 422 respectively. The welding pad 3 is preferably fixedly installed on the protruding portion 412 and the protruding portion 422 through a countersunk screw, so as to facilitate the replacement of different welding pads 3 according to different welding requirements.

[0053] The connecting portion 411 of the fixed support 41 and the connecting portion 421 of the movable support 42 are connected by the horizontal moving mechanism 7, and a space (not shown in the figure) for accommodating the welding base material 1 is formed after the connection, which facilitates the first support 4 to cross over the welding base material 1. This structure facilitates the adjustment of the relative installation positions of the fixed support 41 and the movable support 42, and further facilitates the adjustment of the spacing between the two welding pads 3 according to the joint length of the welding base material 1, meets the welding requirements, and facilitates the replacement of different welding pads 3 according to different welding requirements.

[0054] In the embodiment, the horizontal moving mechanism 7 includes a first long circular hole 71 and a first fastener corresponding arranged on the fixed support 41 or the movable support 42 along the moving direction, wherein, as shown in the figure, the first long circular hole 71 is arranged on the connecting portion 421 of the movable support 42 along the moving direction, and the first fastener is a first stud 72 arranged on the connecting portion 411 of the fixed support 41, and the first stud 72 is fixedly connected by a first wing nut 73 through the first long circular hole 71. Figure 2

[0055] In order to further ensure that the relative moving track of the fixed support 41 and the movable support 42 is a straight line, a horizontal guide structure 8 is further correspondingly arranged on the fixed support 41 and the movable support 42. In order to simplify the structure, in the embodiment, the horizontal guide structure 8 includes two guide long circular holes 81 arranged on the connecting portion 421 of the movable support 42 along the moving direction, the two guide long circular holes 81 are arranged on both sides of the first long circular hole 71 and are parallel to the first long circular hole 71, and two guide studs 82 are arranged on the connecting portion 411 of the fixed support 41, the two guide studs 82 are arranged on both sides of the first stud 72, the two guide studs 82 are correspondingly inserted into the two guide long circular holes 81, and when the fixed support 41 and the movable support 42 move relative to each other, the two guide studs 82 move along the guide long circular holes 81, thereby ensuring that the moving track of the movable support 42 relative to the fixed support 41 is a straight line, playing a guiding role and not being inclined, and ensuring that the center axes of the two welding pads 3 coincide and are symmetrically arranged at both ends of the welding joint.

[0056] Further preferably, the welding pads 3 are at least vertically flush with the inner side surfaces of the protruding portions 412 of the fixed support 41 and the protruding portions 422 of the movable support 42 after installation, that is, simultaneously fit on both side surfaces at the joint of the welding base material 1, which meets the requirement that the two welding pads 3 are gaplessly matched in the horizontal direction when welding the starting end and the ending end of the weld.

[0057] ​In the embodiment, the welding pad 3 is preferably a rectangular flat plate structure, the length of the welding pad 3 can be smaller than the length of the extension part 412 and the extension part 422, and the width of the welding pad 3 is the same as the width of the extension part 412 and the extension part 422.

[0058] As shown in Figure 2 , one first mounting hole 31 is arranged on each of the two welding pads 3, one second mounting hole 43 is arranged on each of the extension part 412 and the extension part 422, and the first mounting hole 31 and the corresponding second mounting hole 43 are fixedly connected by a countersunk screw. Of course, a plurality of second mounting holes 43 can also be arranged on the extension part 412 and the extension part 422 in the axial direction, so that the fixed position of the welding pad 3 relative to the extension part 412 and the extension part 422 can be changed accordingly according to the size of the welding base material 1.

[0059] As shown in Figure 1 and Figure 2 , in the embodiment, it is preferred that the first support 4 has a baffle 44 protruding upward at one end, and it is further preferred that the baffle 44 is arranged on the fixed support 41 and is integrally bent with the fixed support 41, and the second support 5 has at least a vertical surface 51 perpendicular to the surface of the welding base material 1, and the baffle 44 is tightly attached to the vertical surface 51 of the second support 5 and is moved up and down through the lifting structure 6. By adjusting the relative height position of the first support 4 and the second support 5, not only the vertical positioning between the device and the welding base material 1 can be realized, but also the relative installation height of the welding pad 3 relative to the welding base material 1 can be accurately adjusted, so as to change the size between the welding pad 3 and the joint of the welding base material 1, and meet different gap requirements.

[0060] In the embodiment, it is further preferred that the lifting structure 6 includes a second long circular hole 61 extending in the moving direction and a second fastener arranged correspondingly on the baffle 44 or the vertical surface 51 of the second support 5. Figure 2 As shown in , the second long circular hole 61 extending in the moving direction is arranged on the vertical surface 51 of the second support 5, and the second fastener is arranged on the baffle 44 of the fixed support 41, and the second fastener is preferably a second stud 62, and the second stud 62 passes through the second long circular hole 61 and is fixedly connected by a second wing nut 63.

[0061] In order to further ensure that the relative movement trajectory of the fixed support 41 and the second support 5 is a straight line, a lifting guide structure 9 is also correspondingly arranged on the vertical surface 51 of the fixed support 41 and the second support 5. In order to simplify the structure, preferably in the embodiment, the lifting guide structure 9 includes two guide long round holes 91 arranged on the vertical surface 51 of the second support 5 and extending in the movement direction, the two guide long round holes 91 are arranged on both sides of the second long round hole 61 and are parallel to the second long round hole 61, two guide studs 92 are arranged on the baffle 44 of the fixed support 41, the two guide studs 92 are arranged on both sides of the second stud 62, the two guide studs 92 are correspondingly inserted into the two guide second long round holes 61, and when the fixed support 41 and the second support 5 move relative to each other, the two guide studs 92 move along the guide second long round holes 61, thereby ensuring that the trajectory of the movement of the second support 5 relative to the fixed support 41 is a straight line, and playing a guiding role and not being inclined.

[0062] It is further preferred in the embodiment that the vertical surface 51 of the second support 5 is a flat plate structure, and a positioning surface 52 horizontally extends to one side or both sides of the bottom of the vertical surface 51, as shown in the drawings. Figure 3 As shown in the drawings, the positioning surface 52 horizontally extends to one side of the bottom of the vertical surface 51, and the second support 5 as a whole has an L-shaped structure, and the positioning surface 52 is vertically positioned by being attached to the upper surface of the welding base material 1 during welding.

[0063] In the embodiment, the positioning surface 52 extends towards the first support 4, and after installation, the positioning surface 52 is arranged in the space formed by the two connecting portions 411 and 421 of the first support 4. The lower surface of the positioning surface 52 is higher than or flush with the upper surfaces of the extending portions 412 and 422.

[0064] The device can flexibly adjust the spacing size of the welding pad 3 in the vertical and horizontal directions according to different state requirements of the welding joint, so that the gap between the welding pad 3 and the welding base material 1 can be randomly adjusted according to requirements, so that the welding pad 3 can always be in the best state to meet the welding requirements, meet the welding requirements, solve the welding quality problem commonly existing at both ends of the fillet weld of the welding joint in the welding manufacturing process of the railway car body, and is beneficial to improving the welding quality, while saving the repeated operation time and greatly improving the welding efficiency.

[0065] The device can greatly improve the welding quality and save the cost of repairing the welding quality problem and using consumables.

[0066] The device can replace the welding pad material according to different welding materials, and the welding pad 3 can be replaced at any time after being worn out, and the device is very convenient to disassemble and assemble, and other main body structures can be used for a long time, and the device has strong universality.

[0067] Example 2:

[0068] Unlike Embodiment 1, in this embodiment, the first support 4 has a C-shaped cross-section, with the first support 4 opening downwards in a C-shape. Both connecting portions 411 and 42 have C-shaped cross-sections, and both openings towards the central welding base material 1. Extending portions 412 and 422 extend outwards from the horizontal surfaces at the bottom of connecting portions 411 and 421, respectively. The direction of the extending portions relative to the connecting portions is the same as in Embodiment 1. A welding pad 3 is fixedly installed on each of the two extending portions.

[0069] The first bracket 4 provided in this embodiment is the same as that described in Embodiment 1, and it is also straddling the welding material 1. The positioning surface 52 of the second bracket 5 also extends into the space enclosed by the two connecting parts 411 and 421. During welding, the positioning surface 52 abuts against the upper surface of the welding base material 1 to achieve vertical positioning. The adjustment method of the first bracket 4 and the second bracket 5 in this embodiment is the same as that described in Embodiment 1.

[0070] Example 3:

[0071] like Figure 3 As shown, this embodiment provides a method of using the welding auxiliary device as provided in Embodiments 1 and 2, including:

[0072] Step 1: Fix the two required welding pads 3 onto the first bracket 4.

[0073] Specifically, this includes selecting welding pads 3 made of appropriate materials based on the welding requirements of the base material 1.

[0074] The welding pad 3 is fixed to the protrusion 412 of the fixed bracket 41 and the protrusion 422 of the movable bracket 42 by countersunk screws, so that the inner surface of the protrusion 412 and the protrusion 422 is flush with the inner surface of the corresponding welding pad 3 in the vertical direction.

[0075] Step 2: Place the assembled first bracket 4 and second bracket 5 on the welding base material 1, and adjust the distance between the two welding pads 3 according to the size of the welding base material 1 so that the two welding pads 3 are clamped at both ends of the welding base material 4 joint and fit against the end faces of both ends of the welding base material 1 joint.

[0076] Specifically, the first bracket 4 and the second bracket 5, after assembly, are connected across the top of the welding base material 1, with the protrusions 412 and 422 on both sides of the welding base material 1.

[0077] Loosen the first wing nut 73, the movable support 42 relative to the fixed support 41 in the horizontal direction left and right movement, adjust the two welding pads 3 between the spacing, so that the inner side surface of the welding pads 3 with the end face of the welding base material 1 joint two ends of the fit, so that the two welding pads 3 at the arc and the arc at the end of the welding, meet the requirements of the horizontal direction without gap fit when welding.

[0078] Step 3, adjust the relative height position of the first support 4 and the second support 5, so that the bottom of the second support 5 is in contact with the surface of the welding base material 1 to realize vertical positioning, and the distance between the upper surface of the welding pad 3 and the upper surface of the welding base material 1 is the set vertical distance.

[0079] Specifically, loosen the second wing nut 63, so that the first support 4 relative to the second support 5 in the vertical direction up and down movement, adjust the vertical distance between the welding pad 3 and the welding base material 1, in order to meet the welding requirements.

[0080] Step 4, place the welding gun at the joint of the welding base material, and complete the joint welding according to the set welding trajectory.

[0081] Step 4 specifically includes the following steps:

[0082] Step 41, ignite the arc at a first set distance from the start of the weld, the arc point is on the inside of the start of the weld, and control the welding gun to move from the arc point to the start of the weld at a first welding gun angle.

[0083] The first welding gun angle is preferably 95-110°, and the first set distance is preferably 5mm-10mm. After the electric welding is stable, swing the welding gun to the rear side, so that the arc completely melts the end of the welding joint. Under the support of the welding pad, the liquid metal will not collapse and flow downward.

[0084] Step 42, control the welding gun to move from the start of the weld to the end of the weld at a second welding gun angle, and perform normal welding.

[0085] The second welding gun angle is preferably 90°.

[0086] Step 43, control the welding gun to move reversely to the second set distance from the end of the weld at a third welding gun angle, and the arc point is on the inside of the end of the weld.

[0087] Wherein, the second set distance is preferably 5mm-10mm, the third welding gun angle is preferably 95-110°, and the third welding gun angle is the same as the first welding gun angle, or can be different.

[0088] When the welding to the joint end point, the arc is directly applied to the end of the welded joint, and then the welding gun angle is adjusted to about 95-110°, the arc is welded in the opposite direction for about 5mm-10mm, and the welding quality of the end of the weld is ensured under the backing of the welding block 3.

[0089] The above description is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and equivalent embodiments with equivalent changes can be obtained. The embodiments in the above examples can be further combined or replaced, but as long as it does not deviate from the technical solution of the present application, any simple modification, equivalent change and modification of the above examples according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A welding aid comprising two welding blocks, characterized in that: It further includes a first bracket and a second bracket. The first bracket is vertically movably mounted on the second bracket through a lifting structure. Two welding pads are mounted on the first bracket. The first bracket is configured with a structure that can relatively adjust the relative distance between the two welding pads on the horizontal plane. During welding, the second bracket contacts and positions with the welding reference surface, and the two welding pads clamp both ends of the welded base material joint. For a lap joint and a T-joint, the welding reference surface is the upper surface of the welded base material. For an L-joint, the welding reference surface is the welding table for placing the welded base material.

2. The welding aid of claim 1, wherein: The cross-section of the first bracket is in a "channel" shape or a C-shaped structure, forming a space for accommodating the welded base material. During welding, the first bracket straddles above the welded base material.

3. The welding aid of claim 2, wherein: The first bracket includes a fixed bracket and a movable bracket. The movable bracket is connected to the fixed bracket through a horizontal movement mechanism. One of the welding pads is fixed on each of the fixed bracket and the movable bracket. The distance between the two welding pads is adjusted by horizontally adjusting the relative mounting position between the movable bracket and the fixed bracket.

4. The welding aid of claim 3, wherein: The horizontal movement mechanism includes a first oblong hole extending along the movement direction and a first fastener correspondingly arranged on the fixed bracket and the movable bracket. The first fastener passes through the first oblong hole to achieve fixed connection.

5. The welding aid of claim 3, wherein: Both the fixed bracket and the movable bracket include a connecting portion and an extending portion. The cross-section of the connecting portion is in a Z shape or a C shape. The extending portion extends outward from the horizontal plane at the bottom of the connecting portion. The welding pad is fixed on the extending portion. The connecting portions of the fixed bracket and the movable bracket are connected through the horizontal movement mechanism and form a space for accommodating the welded base material after connection.

6. The welding aid of claim 3, wherein: After installation, at least the inner surface of the welding pad facing the welded base material is flush with the inner surfaces of the fixed bracket and the movable bracket vertically.

7. The welding aid of any of claims 1-6, wherein: At one end of the first bracket, there is a baffle protruding upward. The second bracket at least has a vertical surface perpendicular to the surface of the welded base material. The baffle closely adheres to the vertical surface of the second bracket and realizes vertical movement through the lifting structure.

8. The welding aid of claim 7, wherein: The lifting structure includes a second oblong hole extending along the movement direction and a second fastener correspondingly arranged on the baffle and the second bracket. The second fastener passes through the second oblong hole to achieve fixed connection.

9. The welding aid of claim 7, wherein: At the bottom of the vertical surface of the second bracket, a positioning surface horizontally extends to one side or both sides. The positioning surface fits with the welding reference surface during welding to achieve vertical positioning.

10. A method of using a welding aid as claimed in any one of claims 1-9, characterized in that It includes: Step 1: Fix the required welding pads on the first bracket. Step 2: Place the first bracket and the second bracket on the welded base material. Adjust the distance between the two welding pads according to the size of the welded base material, so that the two welding pads clamp both ends of the welded base material joint and fit with the end surface of the welded base material joint. Step 3: Adjust the relative height position between the first bracket and the second bracket, so that the bottom of the second bracket contacts the welding reference surface to achieve vertical positioning, and the distance between the upper surface of the welding pad and the upper surface of the welded base material is the set vertical distance. Step 4: Place the welding torch at the welded base material joint and complete the joint welding according to the set welding trajectory.

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