FIELD: technological processes.
SUBSTANCE: when forming, the sheet preform is placed in a conical matrix and sequential local pressing is performed with a punch while simultaneously moving the blank or punch relative to each other with a predetermined pitch. In this case, there is a partial overlap of each previous spot of application of the punch over the surface of the workpiece, the value of which is not less than half its diameter. The radius of the spherical working surface of the punch is preliminarily determined taking into account the shell radius, the thickness of the billet sheet material and its mark using the calculated finite-element mathematical model based on the ANSYS system.
EFFECT: quality of the resulting spherical surface of the shells is improved by eliminating the springing of the material.
6 dwg
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