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
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[0028] Example 1
[0029] Copper gasket molding groove width selection D 1 =5mm, depth H=0.5mm, cooling water hole radius R 1 =6mm, vent radius R 2 =4mm, cooling water flow V 1 =3-5L / min, protective gas flow V 2 =2.5L / min, ventilate to the copper pad 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 welding joint performance parameter table
[0032]
[0033] It can be seen from Table 2 that cooling water inside the gasket can effectively reduce the deformation angle of the weld, and the shielding gas under the upper cover plate can effectively prevent oxidation (discoloration) of the back weld. This shows that the device of the present invention and the corresponding welding method are effective in practical applications.
[0034] The metallographic diagrams of the welds of Comparative Example 1 and Example 1 are as follows...
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