STAMPED BLANK MOULDING METHOD AND APPARATUS Russian patent published in 1995 - IPC

FIELD: production of pieces, made from stamped blanks. SUBSTANCE: initially flange of blank is placed between deforming punch and deforming die. Peripheral part of flange is pressed along its limited width and central part of blank flange is clamped. Then, using definite contour, central part of blank flange is moulded by placing of blank flange middle fibre in specific position in respect to neutral fibre of punch-die joint till appearance at least in limited zone of blank flange of controlled inner tension. Then on free part of blank flange they exercise longitudinal bending, controlled and oriented by relocation of blank flange Peripheral part, preserving constant thickness and diameter of blank flange, with simultaneous turning of Peripheral part of blank flange to make bent edge. In process of longitudinal bending of blank flange free part deformation of the free part is oriented. Apparatus has deforming punch and die and also upper and lower pressing tools. Apparatus has joints of radial and vertical motion of pressing tools, that have wedges with several wedge surfaces and sliders with wedge areas. Upper and lower pressing tools have wedge surfaces. Apparatus has mean to control longitudinal bending and blank flange peripheral part along side walls of punch or die. Apparatus also has deformed V-shaped plate, that influences on the peripheral part of blank. The plate rests at punch-die joint and pressing tool. The plate is provided with means of its relocation and clamping in process of moulding. EFFECT: method and apparatus are used in production of pieces, made from stamped blanks.