The structure of the elastic blank holding device was improved.

Taking the drawing die for the wheel spoke as an example, a method by adopting the rigid blank_holding ring after refining treatment, and by controlling the clearance between the blank_holding ring and the matrix surface and reducing the curvature radium of the matrix mouth was introduced.

Critical calculation and numerical simulation of rightly using blank holder in sheet metal forming;

The drawing die structure of shirt oil bottom shell is introduced,the surrounding border of shirt oil bottom shell needs to be drawn at concave die and blank holder.

The structure of a drawing die without a blank holder and with a flange is proposed.

In this paper,the effect of the structure of blank-holder on the distribution of blank-holder stress during sheet metal forming has been investigated by numerical simulation and experimental measurement method.

Through a specific example,it not only described laser-hardening technology for solving deep drawing mould blank-holder hamstring problem,but also through the mould material and heat treatment options,laser hardening,changing the traditional manufacturing technology of mould blank-holder were carried out.

Design of multi-position progressive die for circlip for hole;