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Gas electric vertical-position welding tray-free arc welding method for vertical-seam welding

A gas-electric vertical welding and gas-electric vertical technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of molten metal leakage, inconsistent weld quality, poor appearance and other problems, and achieve the improvement of construction progress, The effect of saving manpower and improving work efficiency

Inactive Publication Date: 2006-10-25
中国石化集团第二建设有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to use the electrode arc welding welding backing at the starting point in the existing gas-electric vertical welding welding method as the welding arc starting point, which is easy to cause the molten metal to leak here, and the backing and arc starting point It needs to be cleared up, together with the welding blind zone of gas-electric vertical welding, the problem of inconsistent weld quality and poor appearance is caused by the use of electrode arc welding repair welding together. Invented a welding seam that can be welded and formed at one time, without manual repair welding and high welding quality. Gas-electric vertical welding without backing arc welding method for vertical seam welding with perfect quality and appearance

Method used

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  • Gas electric vertical-position welding tray-free arc welding method for vertical-seam welding
  • Gas electric vertical-position welding tray-free arc welding method for vertical-seam welding
  • Gas electric vertical-position welding tray-free arc welding method for vertical-seam welding

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Embodiment 1

[0031] Such as figure 2 shown.

[0032] A gas-electric vertical welding without backing arc-starting welding method for vertical seam welding, which is formed by one-time welding with a gas-electric vertical welding machine. It mainly includes three processes: arc starting, normal welding, and cleaning. The welding machine is automatic, and the specific welding method is as follows:

[0033] Step 1, weld an arc starting plate 6 with the same groove size as the vertical welding groove at the lower part of the vertical seam arc starting point without a circular seam;

[0034] Step 2, install the liner copper pad and the sliding water-cooled copper backing plate of the gas-electric vertical welding at the arc start of the vertical seam 1 to be welded;

[0035] The third step is to control the welding specification so that it transitions from the small specification to the normal specification one by one, and adopts interrupted arc welding within the scope of the small specific...

Embodiment 2

[0039] Such as image 3 shown.

[0040] A gas-electric vertical welding without backing arc-starting welding method for vertical seam welding, which is formed by one-time welding with a gas-electric vertical welding machine. It mainly includes three processes: arc starting, normal welding, and cleaning. The welding machine is automatic, and the specific welding method is as follows:

[0041] Step 1, on the circular seam 7 (formed by the vertical seam steel plate to be welded and the lower steel plate 9) at the junction with the arc starting point of the vertical seam 1, the circular seam groove of the part blocked by the water-cooled block is welded with an electrode arc welding It is full to obtain a process weld 6 with a welding length of 5-10 mm, and the weld is polished smooth;

[0042] Step 2, install the liner copper pad and the sliding water-cooled copper backing plate of the gas-electric vertical welding at the arc start of the vertical seam to be welded;

[0043] T...

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Abstract

The present invention relates to an electrogas welding arc-starting welding method having no need of supporting bottom for welding vertical sea. Said method can weld the vertical seam by means of one-step welding operation and can obtain good appearance of weld, and has no need of artificially repairing welding. It is characterized by that it utilizes run-on tab or circumferential seam as supporting bottom of starting arc, and can control welding specification when the arc is started so as to attain the goal of raising welding quality.

Description

technical field [0001] The invention relates to a welding method, in particular to a butt welding method for standing seams of medium-thick plates such as ship shell plates, storage tanks, metallurgical blast furnaces, large-diameter pipelines and pressure vessels, specifically a standing seam Welding gas-electric vertical welding without backing arc welding method. Background technique [0002] Gas-electric vertical welding is a metal gas shielded arc welding method developed from common gas metal shielded welding and electroslag welding. It uses a water-cooled slider similar to that used in electroslag welding (the rear backing copper backing plate and the sliding copper backing plate) to block the molten metal and force it to form, so as to achieve welding in the vertical position (that is, the standing seam). It is usually used for the welding of vertical position butt welds (hereinafter referred to as standing seams) of thicker low carbon steel and medium carbon steel,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/06B23K9/02
Inventor 冷辉
Owner 中国石化集团第二建设有限公司
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