Shaping processing method and shaping processing device for metal bipolar plate welding warpage

Abstract

The invention provides a shaping processing method and a shaping processing device for metal bipolar plate welding warpage. The inner stress of a metal bipolar plate shaping welding area is removed byadopting a 'point-to-point' resistor element heating manner, and a protection gas circuit provides a protection gas field, so that the surface quality of a metal bipolar plate during the heat treatment process is ensured. The invention provides the shaping processing method and the shaping processing device for metal bipolar plate welding warpage. The shaping processing method and the shaping processing device for metal bipolar plate welding warpage are suitable for metal bipolar plates used for fuel cells, local and automatic welding warpage shaping processing can be realized on the premiseof unchanging the welding process, and the metal bipolar plate welding warpage of the fuel cells is efficiently processed, so that the demand on high-accuracy preparing the metal bipolar plates of thefuel cells on a large scale can be met.

Description

technical field [0001] The invention relates to the technical field of laser welding and shaping, in particular, a metal bipolar plate welding warping shaping method and shaping processing device, which are particularly suitable for shaping and processing metal bipolar plates of fuel cells. Background technique [0002] It is known that fuel cells generate electrical energy through the electrochemical reaction of hydrogen and oxygen. Since the final product is water, it has become an important part of the current pollution-free and zero-emission new energy. [0003] Among them, due to limitations in volume and mass, the graphite plates commonly used in fuel cells are gradually being replaced by metal bipolar plates for carrying hydrogen, oxygen and cooling liquid. Among them, the metal bipolar plate currently used in the industry generally connects the anode plate and the cathode plate by laser welding to form a structure of “two plates and three fields”. [0004] For the m...

AI Technical Summary

Problems solved by technology

This method needs to clamp the metal bipolar plates before the forming treatment, and the efficiency is low; the overall heating will change the strength of the flow channel structure. During the heat treatment process, the mutually extruded metal bipolar plates are prone to characteristic deformation, making Metal bipolar plates cannot meet the requirements of use

[0008] It can be seen that the above two methods cannot meet the large-scale and high-quality preparation requirements for fuel cell metal bipolar plates in the existing industry.

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