Wire-added welding method of manual electric arc welding

A technology of manual arc welding and welding method, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of large gap, difficult welding, deformation, high efficiency, etc. The effect of input rate reduction

Inactive Publication Date: 2010-05-12
CHANGCHUN RAILWAY VEHICLE FACILITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a wire-adding welding method of manual arc welding. By adding welding wire during welding, the problems of high efficiency and deformation during repair welding of manual arc welding are solved, and at the same time, the problem of large timing gap between base metal groups and difficulty in welding can be solved. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Repair the surface of the severely corroded battery box of the train: the thickness of the battery box is about 3mm, and the remaining thickness after corrosion is about 2mm.

[0014] Adopt the welding method of the present invention, use dry welding rod, adopt the welding current of 100A to add welding wire, normal arc welding, after about 30 seconds, when the arc is stable, the welding wire is sent into the welding arc, and the feeding angle should be 90° to that of the welding rod. ° or so, the welding wire is not allowed to leave the gas protection area of ​​the electrode during welding, so as not to be oxidized.

[0015] Grind the weld seam after welding. Repair welding is carried out, and the deformation after welding is small.

Embodiment 2

[0017] Welding and repairing the side wall and end wall with severe corrosion and partial perforation of the train:

[0018] Intercept the corroded part, replace it with a new steel plate for research and matching, and then weld it. If the gap in the welding part is too large during the replacement or research and matching, it is difficult to weld with ordinary welding methods. If the welding method of adding wire is used, it will be completely Can be welded to finish.

[0019] Select the welding current according to the diameter of the electrode. For an acid electrode with a diameter of 3.2mm, the selected welding current is 140A; for normal arc welding, after about 30 seconds, when the arc is stable, send the welding wire into the welding arc at an angle of At about 90° to the electrode, the welding wire is not allowed to leave the gas protection area of ​​the electrode during welding, so as not to be oxidized.

[0020] Grind the weld seam after welding.

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Abstract

The invention discloses a wire-added welding method of manual electric arc welding. By a method of adding a welding wire during welding, the problems of large efficiency and deformation during the repair welding of the manual electric arc welding are solved. Meanwhile, the problems of large gaps and difficult welding when mother materials are assembled can also be solved.

Description

Technical field: [0001] The invention discloses a wire-adding welding method for manual arc welding, which repairs the arc welding to restore the service performance of workpieces and prolong the service life of equipment or parts, and belongs to the technical field of welding technology. Background technique: [0002] In the field of arc welding technology, the normal manual arc has the following problems: the efficiency is relatively low, so the welding efficiency is low in the welding repair process, and if the welding amount is large, the welding deformation is relatively large. Especially when the gap between the base metals to be welded is relatively large, the weld seam is difficult to fuse, which seriously affects the welding quality of the workpiece. Invention content: [0003] The invention discloses a wire-adding welding method of manual arc welding. By adding welding wire during welding, the problems of high efficiency and deformation during repair welding of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173
Inventor 吕长山田洋刘俊鹏
Owner CHANGCHUN RAILWAY VEHICLE FACILITIES
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