Abstract: A new research result has been introduced to the Problem on blank scrap upgoing in automation presswork. The restraint principle which relies mainly on increasing the frictional force is put forward. And by direct comparison of the experimental methods, a new inverse conical die and its design gist are recommended in this Paper. The research result has important significance to the development of automation presswork in the 21st century.

Key words: blank scrap upgoing, new inverse conical die, restraint principle