Extrusion of Hollow Cylindrical Products Using Stepped Punch

The general theory of the technological parameters calculation for basic methods of extrusion by a stepped punch is developed, which allows determining with the sufficient precision all the source data, required for the strength calculation of the stamping tools, for the selection of a number and types of the stamping transitions and equipment as well. The accuracy of the calculation formulae is confirmed by comparison of calculation results with various experimental data.