Current-assisted roll bending forming device and method for ultrathin-wall corrugated plate

Abstract

The invention discloses a current-assisted roll bending forming device and method for an ultrathin-wall corrugated plate, and belongs to the field of roll bending forming machining. The current-assisted roll bending forming device is characterized by comprising a power source and a microstructure working roll set. The microstructure working roller set comprises a first roller and a second roller. Corrugated microstructures are arranged on the surfaces of the first roller and the second roller. One end of the power supply is connected with the first roller and the other end is connected with the second roller. Or one end of the power supply is connected with the first roller and the other end is connected with a thin plate. According to the current-assisted roll bending forming device and method for the ultrathin-wall corrugated plate, the plastic forming limit of the ultra-thin plate is improved, forming springback of an ultra-thin-wall microstructure is restrained, the depth-to-width ratio, the size precision and the like of the corrugated microstructures are improved, and the defects that an existing die forming technology is low in efficiency and small in area, and conventional roll bending forming is small in depth-to-width ratio and large in resilience, and secondary shape correction is needed are overcome.

Description

technical field [0001] The present application relates to the field of roll forming processing, and more specifically relates to a current-assisted roll forming device and method for an ultra-thin-walled corrugated plate. Background technique [0002] The honeycomb structure composed of ultra-thin plate corrugated microstructure has a huge surface area, which is an ideal carrier for catalysts and a key device for automobile exhaust treatment. However, the number of fuel vehicles continues to increase. In 2018, the number of cars in China alone reached 240 million, and the consumption of gasoline reached 140 million tons in 2019. Many regions have successively implemented the "National VI" emission standards, reducing harmful gas emissions. However, environmental problems such as atmospheric pollution, smog and the greenhouse effect are still severe, and there is a long way to go to reduce emissions and carbon emissions. Therefore, facing the "National VII" or even higher ex...

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Problems solved by technology

However, in the commonly used roll forming process, the deformation mode of the thin plate is bending and bulging, the roller teeth and the thin plate are mainly in line contact, and the constraints are small, resulting in large bending springback, warpage, etc., and the thin-wall microstructure accuracy is poor. It is difficult to meet the use requirements, and the shape must be corrected by molding, which limits the advantages of thin plate microstructure roll forming. The width ratio is greatly limited; the honeycomb mesh number is high, the microstructure size is less than 1.0mm, and the wall thickness is 30-100μm, which belongs to the category of mesoscopic scale. Fabrication Difficulty of Wall Corrugated Microstructure

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