Special tool for welding manual argon tungsten-arc welding tube plate

Abstract

A special tool for manual argon tungsten-arc welding of a tube plate is characterized by comprising a positioning rod, a supporting plate and a bearing, the outer diameter of the positioning rod is 1 mm smaller than the inner diameter of a heat exchange tube of the tube plate, and threads are arranged on the periphery of one end of the positioning rod and are in threaded connection with a fixing nut; the supporting plate is of a prototype, the circle center of the supporting plate coincides with the axis of the positioning rod, one face of the supporting plate is welded to the side face of the bearing outer ring, and an arc-shaped positioning block is spot-welded to the position, 30 mm away from the center, of the other face of the supporting plate. After the tool is adopted, the stability of a welder during operation can be improved, the included angle between a welding gun tungsten electrode and a pipe is kept consistent during welding of the welder, and burning loss of a pipe opening cannot be caused; and the welding quality is ensured while the construction efficiency is improved. The tool can isolate the hands of a welder from being in contact with the high-temperature tube plate, prevent the hands of the welder from being scalded, avoid the welding quality problem caused by poor operation of the welder due to high temperature, and also can prolong the construction time and improve the efficiency of the welder.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding tools, and in particular relates to a special tool for manual tungsten inert gas arc welding of tube plates. Background Art

[0002] When manual tungsten inert gas arc welding is used to weld the fillet welds of tubes and plates, the welder needs to support the welding gun with his fingers, which makes it difficult to maintain the stability of the action for a long time. This causes the welding gun to deviate in angle during welding, causing the tungsten electrode to burn to the edge of the tube mouth and the tungsten electrode to extend to the surface of the welding pool, resulting in unqualified weld quality. The welder's physical strength will also decrease during the long welding process, affecting the quality of welding and reducing work efficiency.

[0003] During the welding of the tube sheet corner weld, the welder needs to support the welding gun with his fingers, and the welding gun angle must be rotated according to the arc of the tube weld. During the angle adjustment process, the rotation of the welding gun is very unstable, and the welding position needs to be adjusted multiple times to complete the welding of a pipe mouth. The construction efficiency and quality are unstable. For the welds of special material tube sheets that need to be heated and welded, the temperature of the manual tungsten inert gas arc welder's hand against the tube sheet is very high, and the stability of the welder's hand cannot be guaranteed. There is a risk of burns on the hand, which affects the welding quality and welding efficiency more obviously. Utility Model Content

[0004] The utility model aims to provide a special tool for manual tungsten inert gas arc welding of tube plates, so as to ensure the stability of operation during welding and improve the construction efficiency.

[0005] A special tool for manual tungsten inert gas arc welding of tube sheets, characterized in that it includes a positioning rod, a support plate and a bearing, the outer diameter of the positioning rod is 1 mm less than the inner diameter of the tube sheet heat exchange tube, a thread is arranged on the outer periphery of one end of the positioning rod, and is threadedly connected with a fixing nut; the outer ring of the fixing nut is welded to the inner ring of the bearing, the support plate is a prototype, the center of the circle of the support plate coincides with the axis of the positioning rod, and one side of the support plate is welded to the side of the outer ring of the bearing, and an arc-shaped positioning block is spot welded on the other side of the support plate 30 mm to the right of the center.

[0006] Furthermore, the length of the positioning rod is 10 cm.

[0007] Furthermore, the diameter of the bearing is 50 mm.

[0008] Furthermore, the support plate has a diameter of 100 mm and a thickness of 2 mm.

[0009] Furthermore, the arc-shaped positioning block has a length of 50 mm, a height of 20 mm, and a thickness of 3 mm.

[0010] The beneficial effects of the utility model are as follows: the use of the tool can improve the stability of the welder's operation, ensure that the angle between the tungsten electrode of the welding gun and the pipe is consistent during welding, and will not cause burning of the pipe mouth. Ensure that the distance between the top of the tungsten electrode and the molten pool is basically the same during welding, avoid the tungsten electrode extending into the molten pool to cause tungsten inclusion defects, and improve the quality of the weld. The bearing rotation is used to ensure the stability of the welding gun rotation during welding, so that the welding gun can be rotated from 0 degrees to 180 degrees at one time. The length that previously required two times to weld can now be welded in one time, which improves construction efficiency while also ensuring welding quality. For tube sheet corner welds that need to be heated, this tool can isolate the welder's hands from contact with the high-temperature tube sheet, avoid burns on the welder's hands, avoid welding quality problems caused by poor operation of the welder due to high temperature, and can also increase the welder's construction time and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a side cross-sectional view of a special tool for manual tungsten inert gas arc welding of tube sheets.

[0012] Figure 2 A front view of a special tool for manual tungsten inert gas arc welding of tube sheets.

[0013] Figure 3 The utility model is a schematic diagram of a special tool for manual tungsten inert gas arc welding tube plate welding.

[0014] Among them: 1-tube sheet, 2-positioning rod, 3-support plate, 4-bearing, 5-fixing nut, 6-arc positioning block. DETAILED DESCRIPTION

[0015] Embodiment 1: A special welding tool for manual tungsten inert gas arc welding tube sheet 1, including a positioning rod 2, a support plate 3 and a bearing 4. According to the inner diameter size of the heat exchange tube of the tube sheet 1, the positioning rod 2 is made, and the outer diameter size of the positioning rod 2 is 1mm less than the inner diameter size of the heat exchange tube. The length of the positioning rod 2 is 10cm, and a thread is set on the outer periphery of one end of the positioning rod 2 and is threadedly connected with the fixing nut 5 to play a supporting role in fixing the tool. Select a bearing 4 with a diameter of 50mm, and weld its inner ring to the outer periphery of the fixing nut 5. Process a circular support plate 3 with a diameter of 100mm and a thickness of 2mm, weld and fix the side surface of the outer ring of the bearing 4 and one side of the support plate 3, and align the center of the circle of the support plate 3 with the axis of the positioning rod 2 to avoid eccentricity during rotation. Spot weld an arc-shaped positioning block 6 with a length of 50mm, a height of 20mm, and a thickness of 3mm at a distance of 30mm from the center of the circle on the other side of the support plate 3 to assist the positioning and rotation of the welder's hands.

[0016] After the production is completed, the positioning rod is inserted into the heat exchange tube of the tube sheet 1 and then the welding operation is performed.

Claims

1. A special tool for manual tungsten inert gas arc welding of tube sheets, characterized by: It includes a positioning rod, a support plate and a bearing. The outer diameter of the positioning rod is 1mm less than the inner diameter of the tube sheet heat exchange tube. A thread is set on the outer periphery of one end of the positioning rod and is threadedly connected with a fixing nut. The outer ring of the fixing nut is welded to the inner ring of the bearing. The support plate is a prototype, and its center coincides with the axis of the positioning rod. One side of the support plate is welded to the side of the outer ring of the bearing, and an arc-shaped positioning block is spot-welded on the other side of the support plate 30mm to the right of the center.

2. A manual tungsten inert gas welding tube sheet special tool as claimed in claim 1, characterized in that The length of the positioning rod is 10 cm.

3. A manual tungsten inert gas welding tube sheet special tool as claimed in claim 1, characterized in that The diameter of the bearing is 50 mm.

4. A manual tungsten inert gas welding tube sheet special tool as claimed in claim 1, characterized in that The support plate has a diameter of 100 mm and a thickness of 2 mm.

5. A manual tungsten inert gas welding tube sheet special tool as claimed in claim 1, characterized in that The arc-shaped positioning block has a length of 50 mm, a height of 20 mm and a thickness of 3 mm.

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