APPARATUS FOR FORMING PARTS FROM LESS SIZE SHEET BLANKS AFTER PRELIMINARY EXPANSION Russian patent published in 2001 - IPC

FIELD: plastic metal working, namely formation of large-size parts of sheet materials, for example body panels of motor vehicles. SUBSTANCE: punch 1 and die 2 of apparatus are arranged in such a way that their working surfaces are inclined relative to blank 5 and to holder 3,4 on which braking member in the form of rib is shaped. Then holder is moved in opposite direction for expanding blank. At further action upon punch 1 and die 2 with simultaneous mutually opposite efforts, blank is finally deformed along working surfaces of punch and die. Inclination angle of working surfaces of punch and die relative to holder allows to make parts from less size blanks with desired accuracy. EFFECT: simplified design, less cost and enhanced efficiency of apparatus. 3 dwg