A superplastic forming device and process for a metal bipolar plate of a proton exchange membrane fuel cell

Abstract

The invention relates to a bipolar plate forming technology, in particular to super-plastic forming device and process of a metal bipolar plate for a proton exchange membrane fuel cell. The device comprises a pressure plate, guide sleeves, springs, guide posts, a pressing rod, an environmental box, an upper template, a lower template, a base, a connection plate, a blank pressing plate, a metal plate and a support rod. The process implemented by the device comprises the following steps: (1) opening the environmental box; (2) fixing a metal sheet of a processed part on the lower template; (3) closing the environmental box, determining the super-plastic forming temperature according to a processed plate and inputting the super-plastic forming temperature into a control system; (4) setting the stroke and the movement rate of the upper template according to the super-plastic strain rate and flow channel shape of the processed plate; (5) starting a circuit system and the environmental box, starting a pressure forming machine to move downwards, and finishing stamping; (6) starting the upper template of a press to reversely return back to the initial position; and (7) opening the environmental box, and cooing and taking out a formed part. According to the super-plastic forming device and process, the material is effectively prevented from rebounding, and the forming accuracy and the dimensional accuracy are ensured.

Description

1. Technical field [0001] The invention relates to the technical field of forming bipolar plates for proton exchange membrane fuel cells, in particular to a superplastic forming device and process for metal bipolar plates of proton exchange membrane fuel cells. 2. Background technology [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy. It has the advantages of high energy conversion efficiency and low environmental pollution. It has become an alternative to existing fossil fuel power generation equipment and fossil fuel power equipment. best choice. Proton Exchange Membrane Fuel Cell (PEMFC), which uses hydrogen as raw material, has the characteristics of cleanliness, high efficiency and regeneration, and is considered to be the preferred power generation technology in the 21st century. All have broad application prospects. [0003] As one of the key components of PEMFC, the bipolar pl...

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Problems solved by technology

On May 16, 2007, the State Intellectual Property Office of China published the publication number CN1964114A, titled "Manufacturing Method for Metal Bipolar Plates of Proton Exchange Membrane Fuel Cells Based on Roll Forming"; The shape of the flow channel of the bipolar plate, but the forming process is more complicated

The State Intellectual Property Office of China published the publication number CN103920988A on July 16, 2014, titled "A Method and Device for Laser Shocking Half-Mold Forming of Metal Flow Field Plates for Micro Fuel Cells"; the invention proposes a method for stamping half-molds by laser Forming, this method has high processing costs and is mostly suitable for micro fuel cells

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