Negative-pressure adsorption welding device and negative-pressure adsorption welding method

Abstract

The invention discloses a negative-pressure adsorption welding device which comprises a negative-pressure producing assembly and negative-pressure adsorption plate assemblies; the negative-pressure adsorption plate assemblies comprise a bottom negative-pressure adsorption plate assembly and a top negative-pressure adsorption plate assembly; negative-pressure adsorption chambers are formed between the negative-pressure plate assemblies and the adsorption plate assemblies; the negative-pressure production assembly communicates with the negative-pressure adsorption chambers for extracting air in the negative-pressure adsorption chambers to form vacuum negative pressure; a plurality of negative-pressure adsorption holes are formed in the adsorption plate assemblies for fixing to-be-welded parts onto the adsorption plate assemblies in a negative-pressure adsorption manner to carry out welding operation when vacuum negative pressure is formed in the negative-pressure adsorption chambers. The invention further discloses a negative-pressure adsorption welding method. The negative-pressure adsorption welding device is reasonable in design, is convenient and quick to operate, is small in welding deformation and is capable of reducing working cost and improving working efficiency.

Description

Technical field [0001] The invention mainly relates to the field of metal welding, in particular to a negative pressure adsorption welding device for rail transit equipment and a negative pressure adsorption welding method. Background technique [0002] In the metal welding work of the prior art, the object to be welded will generate large thermal stress and large welding deformation during welding. The deformation of the weldment refers to the local heating and cooling of the weldment during the welding process. Thermal strain is generated near the filler metal and the base metal. This thermal strain will produce shrinkage stress when the weld bead is cooled, which will cause the weldment to bend, twist or twist, which is called deformation. Especially when the object to be welded involves stainless steel material or when the object to be welded is relatively thin, the welding deformation is more serious, making the size of the welded product not meet the requirements of the dra...

AI Technical Summary

Problems solved by technology

If it takes a long time, its low efficiency will inevitably form a production bottleneck

[0009] (6) When the object to be welded has a certain structure, if the object to be welded is an electrical cabinet used in rail transit equipment (such as high-speed rail, subway, etc.), the welding flatness of the electrical cabinet cabinet is required to be high, but the cabinet space is very large. Small, which makes the post-adjustment using other methods such as the existing flame adjustment, there will be great operational limitations, making the adjustment effect poor, the adjustment efficiency low, and the quality difficult to control

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