METHOD OF MAKING SHELLS OF SHEET BLANKS Russian patent published in 1995 - IPC

FIELD: plastic metal working. SUBSTANCE: method of making shells of the sheet blanks made of the materials with the superplastic modification with the use of a frame made of the material with the nonsuperplastic modification includes their connection with each other and the molding by the pressure of the working environment created in the reservoir between the sheet blanks. The frame is installed between the sheet blanks. It is recommended that the frame should be preliminarily given the configuration of the corresponding part of the finished product. It is advisable to connect up the system of feeding the working environment to the frame. The frame can be made of the material nonsuperplastic at the temperature of molding the sheet blanks. EFFECT: reduced labour intensity of the article production at the expense of excluding operations concerning its separation from the frame, simpler design of the used equipment at the expense of removing the necessity of the blank fixation in the stamping fitting out, enhanced quality of the article production at the expense of creating favorable conditions for the transformation of the welded flange into the lateral surface of the article. 2 cl, 2 dwg