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A kind of one-time welding method

A welding method and one-time technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as low production efficiency and impact on product welding quality, achieve high welding efficiency, protect physical and mental health, and improve the working environment Effect

Inactive Publication Date: 2016-02-10
陕西国德电气制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such problems are often encountered in the production of low-pressure vessels. A tubular girth weld will have carbon steel / carbon steel joints, carbon steel / austenitic stainless steel joints, austenitic stainless steel / austenitic stainless steel joints at the same time The three types of welded joints of the joints still adopt the welding process of segmental welding in the low-pressure container manufacturing industry. This process has a certain impact on the welding quality of the product, and the production efficiency is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of disposable welding method, comprises the following steps:

[0017] The first step is to butt the two sections of the main cylinder composed of carbon steel and 1Cr18Ni9Ti welding. The wall thickness of the body is greater than 6-10mm, and the diameter of the cylinder is 800-1000mm;

[0018] In the second step, a fully automatic MAG welding machine is used for internal seam welding, the welding wire is DW-309L flux-cored welding wire, and the shielding gas is 100% CO 2 , select the current, voltage, welding thickness and welding speed when the inner seam is bottoming, and the swing amplitude and swing dwell time when the inner seam is covered are determined by combining the selected parameters of current, voltage, welding layer thickness and welding speed. For parameter selection, see Schedule;

[0019] In the third step, the outer seam is cleaned by arc gouging, and then welded by a fully automatic MAG welding machine. The welding wire is DW-309L flux-cored ...

Embodiment 2

[0024] A kind of disposable welding method, comprises the following steps:

[0025] The first step is to butt the two sections of the main cylinder composed of carbon steel and 1Cr18Ni9Ti welding. The wall thickness of the body is greater than 10-16mm, and the diameter of the cylinder is 1000-1400;

[0026] In the second step, a fully automatic MAG welding machine is used for internal seam welding, the welding wire is DW-309L flux-cored welding wire, and the shielding gas is 100% CO 2 , select the current, voltage, welding thickness and welding speed when the inner seam is bottoming, and the swing amplitude and swing dwell time when the inner seam is covered are determined by combining the selected parameters of current, voltage, welding layer thickness and welding speed. For parameter selection, see Schedule;

[0027] In the third step, the outer seam is cleaned by arc gouging, and then welded by a fully automatic MAG welding machine. The welding wire is DW-309L flux-cored ...

Embodiment 3

[0032] A kind of disposable welding method, comprises the following steps:

[0033] The first step is to butt the two sections of the main cylinder composed of carbon steel and 1Cr18Ni9Ti welding. The wall thickness of the body is greater than 16-22mm, and the diameter of the cylinder is more than 1400mm;

[0034] In the second step, a fully automatic MAG welding machine is used for internal seam welding, the welding wire is DW-309L flux-cored welding wire, and the shielding gas is 100% CO 2 , select the current, voltage, welding thickness and welding speed when backing the inner seam, and determine the swing amplitude and swing dwell time when covering the inner seam in combination with the selected parameters of current, voltage, welding layer thickness and welding speed. For parameter selection, see Schedule;

[0035] In the third step, the outer seam is cleaned by arc gouging, and then welded by a fully automatic MAG welding machine. The welding wire is DW-309L flux core...

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Abstract

The invention discloses a one-time welding method. Two main cylinders formed by welding carbon steel and 1Cr18Ni9Ti are abutted with each other to form an inner groove so as to generate carbon steel / carbon steel, carbon steel / 1Cr18Ni9Ti, and 1Cr18Ni9Ti / 1Cr18Ni9Ti welding joints; and an inner seam is welded by a full automatic metal active gas (MAG) welder, and an outer seam is subjected to back gouging by an arc air gouging method and is welded by the full automatic MAG welder. On the premise of ensuring the welding quality of a carbon steel / carbon steel joint type, a carbon steel / austenitic stainless steel joint type and an austenitic stainless steel / austenitic stainless steel joint type, labor intensity is reduced, and production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of low-pressure container welding, in particular to a one-time welding method. Background technique [0002] In recent decades, with the rapid development of China's economy, low-pressure vessels made of different materials have appeared in the design and manufacture of low-pressure vessels, and welding problems between carbon steel and austenitic stainless steel have often been encountered during the manufacturing process. For a long time, most of the welding of carbon steel and austenitic stainless steel in my country's low-pressure container manufacturing industry still adopts traditional manual arc welding. Although this production process can obtain better welding quality, it has high labor intensity and low production efficiency. Relatively low, the most important thing is that manual operation requires relatively high technical level of welders. Such problems are often encountered in the production of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/00
Inventor 许礼仁席侃
Owner 陕西国德电气制造有限公司
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