The clinching process is a method of joining sheet metal by localised coldforming of the materials. Coated and painted sheet metals can also be joined together without altering the surface finish. offers 112 metal clinching tool products. About 16% of these are punching machines, 13% are other metal & metallurgy machinery, and 8% are other hand tools. A wide variety of metal clinching tool options are available to you, such as free samples. There are 112 metal clinching tool suppliers, mainly located in Asia.