Narrow-gap welding gun

Abstract

The utility model relates to a narrow-gap welding gun, and belongs to the technical field of welding. According to the technical scheme, a rotating block (205) is installed on a welding gun body (220), and a water cooling channel is formed in the rotating block and connected with a water cooling cable connector (218) and a first water cooling connector (219); a gear III (204) is mounted at the lower end of the rotating block; a welding gun rod (201) is mounted in the center of the rotating block, and an offset contact tube (211) is arranged at the lower end of the welding gun rod; an adjusting block (217) is installed on the side face of the welding gun body (220), an adjusting rod (209) is installed on the adjusting block, a connecting plate (208) is installed at the lower end of the adjusting rod, and a secondary protective gas hood (206) is installed on the connecting plate. The device has the advantages that the narrow-gap welding gun can conduct swing welding and can adapt to large-groove welding with the size range changing, the secondary protection gas hood can move up and down, the secondary protection effect is improved, and the device is particularly suitable for welding under the site construction condition and is good in welding quality.

Description

Technical Field

[0001] The utility model relates to a narrow gap welding gun, belonging to the technical field of welding. Background Art

[0002] Narrow gap welding is mainly used for welding thick-walled structures. A small-angle groove or no groove is opened at the welding position. This not only reduces the consumption of welding materials, but also greatly improves the welding efficiency. At the same time, narrow gap welding has low heat input, a narrow heat-affected zone, small welding deformation, and excellent welding joint performance. For example, Chinese patent CN202011546863.0 (a narrow gap welding method using a rotating electrode composite rotating arc) and so on. However, if the size and weight of the component are very heavy, the assembly accuracy is poor, and the groove variation range is large, the narrow gap welding gun of the existing technology has a small movement range and cannot be welded with a large groove with a large size range. In addition, the secondary protective gas hood of the narrow gap welding gun of the existing technology cannot move up and down, and the secondary protection effect is not ideal. Utility Model Content

[0003] The utility model aims to provide a narrow gap welding gun, which can be used for swing welding and can adapt to large groove welding with varying size ranges. The secondary protective gas hood can move up and down to improve the secondary protection effect and solve the above-mentioned technical problems existing in the prior art.

[0004] The technical solution of the utility model is:

[0005] A narrow gap welding gun comprises a welding gun rod, gear three, a rotating block, a secondary protective gas hood, a connecting plate, an adjustment rod, an offset conductive nozzle, an adjustment block, a water-cooled cable connector, a water-cooled connector one and a welding gun body, wherein the rotating block is installed on the welding gun body, a water-cooled channel is provided in the rotating block, and the channels are respectively connected to the water-cooled cable connector and the water-cooled connector one; gear three is installed at the lower end of the rotating block; the welding gun rod is installed at the center of the rotating block, and an offset conductive nozzle is provided at the lower end of the welding gun rod; an adjustment block is installed on the side of the welding gun body, an adjustment rod is installed on the adjustment block, a connecting plate is installed at the lower end of the adjustment rod, and a secondary protective gas hood is installed on the connecting plate; the adjustment block adjusts the adjustment rod to move up and down, thereby driving the secondary protective gas hood to move up and down.

[0006] The secondary protective gas hood is provided with a second water cooling pipe and a secondary protective gas joint.

[0007] The welding gun body is equipped with a motor 4, and a gear 2 is installed at the lower end of the motor 4; the gear 2 is meshed with the gear 3, and driven by the motor 4, the welding gun rod is driven to perform reciprocating or continuous rotational motion.

[0008] A water cooling pipe is provided on both sides of the welding gun rod, the lower ends of the two water cooling pipes are connected, the upper ends of the two water cooling pipes are connected to water cooling joints, and the water cooling pipe passes cooling water to cool the welding gun rod; a primary protective air pipe is provided on both sides of the two water cooling pipes, and a primary protective air nozzle is installed at the lower end of the primary protective air pipe.

[0009] The biasing contact tip is well known and used in the art.

[0010] The beneficial effects of the utility model are: the narrow gap welding gun can be swung for welding, can adapt to the welding of large grooves with varying size ranges, the secondary protective gas hood can move up and down, and the secondary protection effect is improved. The utility model is particularly suitable for welding under on-site construction conditions, and has good welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an axial view of an embodiment of the utility model;

[0012] Figure 2 It is a front view of an embodiment of the utility model;

[0013] Figure 3 It is a side view of an embodiment of the utility model;

[0014] Figure 4 It is a cross-sectional view of an embodiment of the utility model;

[0015] Figure 5 It is a schematic diagram of the use of an embodiment of the utility model;

[0016] In the figure: moving device 1, narrow gap welding gun 2, laser sensor device 3, track 4, welding gun rod 201, motor four 202, gear two 203, gear three 204, rotating block 205, secondary protective gas hood 206, primary protective gas nozzle 207, connecting plate 208, adjusting rod 209, mounting block four 210, offset conductive nozzle 211, water cooling pipe two 212, secondary protective gas connector 213, primary protective gas pipe 214, water cooling connector two 215, water cooling pipe one 216, adjusting block 217, water cooling cable connector 218, water cooling connector one 219, welding gun body 220. DETAILED DESCRIPTION

[0017] The present invention will be further described below through examples in conjunction with the accompanying drawings.

[0018] A narrow gap welding gun, comprising a welding gun rod 201, a gear three 204, a rotating block 205, a secondary protective gas cover 206, a connecting plate 208, an adjusting rod 209, an offset conductive nozzle 211, an adjusting block 217, a water-cooled cable connector 218, a water-cooled connector one 219 and a welding gun body 220, wherein the rotating block 205 is installed on the welding gun body 220, and a water-cooled channel is provided in the rotating block 205, which is respectively connected to the water-cooled cable connector 218 and the water-cooled connector one 219; the rotating block A gear 3 204 is installed at the lower end of 205; a welding gun rod 201 is installed at the center of the rotating block 205, and an offset conductive nozzle 211 is provided at the lower end of the welding gun rod 201; an adjustment block 217 is installed at the side of the welding gun body 220, an adjustment rod 209 is installed on the adjustment block 217, a connecting plate 208 is installed at the lower end of the adjustment rod 209, and a secondary protective gas hood 206 is installed on the connecting plate 208; the adjustment block 217 adjusts the adjustment rod 209 to move up and down, thereby driving the secondary protective gas hood 206 to move up and down.

[0019] The secondary protective gas cover 206 is provided with a second water cooling pipe 212 and a secondary protective gas connector 213 .

[0020] The welding gun body 220 is mounted with a motor 4 202 , and a gear 203 is mounted at the lower end of the motor 4 202 ; the gear 203 is meshed with the gear 3 204 , and driven by the motor 4 202 , the welding gun rod 201 is driven to perform reciprocating or continuous rotational motion.

[0021] Water cooling pipes 216 are respectively arranged on both sides of the welding gun rod 201, the lower ends of the two water cooling pipes 216 are connected, and the upper ends of the two water cooling pipes 216 are respectively connected to water cooling joints 215, and cooling water is passed through the water cooling pipes 216 to cool the welding gun rod 201; primary protective air pipes 214 are respectively arranged on both sides of the two water cooling pipes 216, and a primary protective air nozzle 207 is installed at the lower end of the primary protective air pipe 214.

[0022] In the embodiment, the narrow gap welding gun 2 and the laser sensor device 3 of the utility model are arranged on the moving device 1, the track 4 is installed on the workpiece to be welded along the direction of the weld, and the moving device 1 is installed on the track, driving the narrow gap welding gun 2 and the laser sensor device 3 to move along the direction of the weld; the moving device 1 is provided with a two-dimensional moving mechanism composed of two slides, and the narrow gap welding gun 2 and the laser sensor device 3 are arranged on the two-dimensional moving mechanism, and the two-dimensional moving mechanism drives the narrow gap welding gun 2 and the laser sensor device 3 to move along the left and right directions of the weld and the up and down directions of the weld to realize the swing welding of the welding gun; the welding gun body 220 of the narrow gap welding gun 2 is provided with a welding gun rod 201, and the bottom of the welding gun rod 201 is connected to the biased conductive nozzle 211, and the biased conductive nozzle 211 is driven to reciprocate or continuously rotate by rotating the welding gun rod 201 to realize narrow gap welding; the laser sensor device 3 is used to detect the groove size and the weld position.

[0023] In the embodiment, the workpiece to be welded is located at the welding and installation site of the cylinder base in the wind power industry, and its main structure is flat plate butt welding, thickness: 50mm-100mm, length: 2.4-3.6m, and material is Q355B. Due to the heavy size and weight of the component, poor assembly accuracy, and large groove variation range, it cannot be welded using the narrow gap welding device of the existing technology.

[0024] The narrow gap welding gun 2 of the utility model is used to weld the above-mentioned workpiece to be welded. The track 4 is directly installed on the workpiece to be welded along the direction of the weld, and the moving device 1, the narrow gap welding gun 2 and the laser sensor device 3 are installed. The specific welding operation process is as follows: under the drive of the motor 102, the moving device 4 drives the narrow gap welding gun 2 and the laser sensor device 3 to move along the direction of the weld. The laser sensor device 3 is arranged in front of the narrow gap welding gun 2 to detect the size and position deviation of the root of the groove, and the result is fed back to the control system. According to the detection result, the control system controls the motor 3 108 to rotate and drives the slide 2 107 to move along the left and right directions of the weld. On the one hand, the narrow gap welding gun 2 is adjusted to always be at the center position of the weld during the welding process. On the other hand, when the groove is large, the narrow gap welding gun 2 is driven to swing according to the set parameters; at the same time, according to the detection result, the control system drives the motor 4 202 to rotate, drives the welding gun rod 201 and the offset conductive nozzle 211 to reciprocate or continuously rotate according to the set parameters, so as to realize the movement of the arc inside the groove and complete the first layer of narrow gap welding process. Then, according to the single-layer welding thickness, the motor 2 106 is driven to adjust the position of the slide 105, and the narrow gap welding gun 2 is raised to a suitable position. At the same time, in order to ensure a good weld protection effect, the secondary protective gas hood 206 is moved to a suitable position through the adjustment block 217 and the adjustment rod 209, and the above welding process is repeated until the entire welding process is completed.

[0025] The control system in the embodiment is a control system known and used in the art, and a corresponding control program can be compiled as needed to realize the control function. Since the narrow gap welding gun of the utility model can be swung for welding and can be adjusted in multiple directions and angles according to the welding needs on site, it can adapt to the welding of large grooves with varying sizes, and reduce the accuracy requirements for the workpiece assembly.

Claims

1. A narrow gap welding gun, characterized in that: The invention comprises a welding gun rod (201), a gear three (204), a rotating block (205), a secondary protective gas hood (206), a connecting plate (208), an adjusting rod (209), an offset conductive nozzle (211), an adjusting block (217), a water-cooling cable connector (218), a water-cooling connector one (219) and a welding gun body (220), wherein the rotating block (205) is mounted on the welding gun body (220), and a water-cooling channel is arranged in the rotating block (205), which is connected to the water-cooling cable connector (218) and the water-cooling connector one (219) respectively. The rotating block (205) is connected to a water-cooling joint one (219); a gear three (204) is installed at the lower end of the rotating block (205); a welding gun rod (201) is installed at the center of the rotating block (205), and an offset conductive nozzle (211) is provided at the lower end of the welding gun rod (201); an adjustment block (217) is installed on the side of the welding gun body (220), an adjustment rod (209) is installed on the adjustment block (217), a connecting plate (208) is installed at the lower end of the adjusting rod (209), and a secondary protective gas cover (206) is installed on the connecting plate (208).

2. A narrow gap welding gun according to claim 1, characterized in that: The secondary protective gas hood (206) is provided with a second water cooling pipe (212) and a secondary protective gas joint (213).

3. A narrow gap welding gun according to claim 2, characterized in that: Motor 4 (202) is installed on the welding gun body (220), and gear 2 (203) is installed at the lower end of motor 4 (202); gear 2 (203) is meshed with gear 3 (204).

4. A narrow gap welding gun according to claim 3, characterized in that: Water cooling pipes (216) are respectively arranged on both sides of the welding gun rod (201); the lower ends of the two water cooling pipes (216) are connected, and the upper ends of the two water cooling pipes (216) are respectively connected to water cooling joints (215); primary protective air pipes (214) are respectively arranged on both sides of the two water cooling pipes (216); and a primary protective air nozzle (207) is installed at the lower end of the primary protective air pipe (214).

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