Metal member press working method and die for press working

摘要

The invention provides a stamping processing method for metal members and a mold for the stamping processing, which is applicable to the stamping processing of metal members which are difficult to be processed, such as titanium members or magnesium alloy members. The mold for the stamping processing comprises a fine concavo-convex part formed as at least part of a member in contact with metal members and equipped with fine irregularities and a fluororesin film. The maximum surface roughness of the fine concavo-convex part is within the range of 3 mum - 25 mum. The fluororesin film is formed on the fine concavo-convex part in a way that only part of the plurality of top parts of the fine concavo-convex part are exposed. The fluororesin film is adhered to the surface of the fine concavo-convex part.