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Single-sided welding copper liner device with water cooling and back protection and corresponding welding method

A technology of back protection and copper lining, applied in welding equipment, auxiliary devices, welding accessories, etc., can solve the problems of easy inclusion and short life, and achieve the effect of low processing cost, light weight and compact structure

Active Publication Date: 2019-06-11
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the disadvantages of the existing copper pads that only have the function of forced forming, easy inclusion, short life, etc., and provide a single-sided copper pad device with water cooling and back protection and a corresponding welding method

Method used

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  • Single-sided welding copper liner device with water cooling and back protection and corresponding welding method
  • Single-sided welding copper liner device with water cooling and back protection and corresponding welding method
  • Single-sided welding copper liner device with water cooling and back protection and corresponding welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Copper pad forming groove width selection D 1 =5mm, depth H=0.5mm, cooling water hole radius R 1 =6mm, air hole radius R 2 =4mm, cooling water flow V 1 =3-5L / min, protective gas flow V 2 =2.5L / min, ventilate the copper liner forming groove for 1-2min before welding.

[0030] The properties of the welded joints obtained in Comparative Examples 1-2 and Example 1 are shown in Table 2.

[0031] Table 2 comparative example and embodiment welded joint performance parameter table

[0032]

Weld Deformation Angle

Back weld color

tensile strength

Comparative example 1

About 1.66°

silver white

About 227.7MPa

Comparative example 2

About 1.09°

silver gray

About 238.3MPa

Example 1

About 1.06°

silver white

About 239.9MPa

[0033] It can be seen from Table 2 that passing cooling water inside the gasket can effectively reduce the deformation angle of the weld, and passing shielding gas under the uppe...

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Abstract

The invention belongs to the technical field of welding, and particularly relates to a single-sided welding copper liner device with water cooling and back protection and a corresponding welding method. By circulating cooling water and shielding gas inside a copper liner, the good welding forming effect of workpieces to be welded is ensured, many beneficial effects of reducing welding deformation,prolonging the service life of the liner, preventing oxidation inclusion on the back of a weld seam, refining weld seam grains, improving the tensile strength of the weld seam and the like are realized, and the single-sided welding copper liner device is suitable for various electric-arc welding methods.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a single-side copper welding pad device with water cooling and back protection and a corresponding welding method. Background technique [0002] Limited by factors such as welding structure and welding position, only one-side welding and double-side forming technology can be used for some welds. Relevant data and practices show that single-sided welding and double-sided forming technology can increase production efficiency by about three times, save 10% of materials and 50% of electric energy. Commonly used welding pads can be divided into ceramic pads and copper pads according to different materials. Although ceramic pads are the most widely used, they can only be used once, resulting in high production costs; currently used copper pads have no flux layer, the back weld is not protected when processing aluminum alloy weldments, and it is easy to cause inclusions. ...

Claims

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Application Information

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IPC IPC(8): B23K37/00B23K9/32
Inventor 汪选国黄帅帅张华韩少云
Owner WUHAN UNIV OF TECH
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