METHOD AND MACHINE FOR MANUFACTURE OF PARTS FROM METAL SHEET Russian patent published in 1999 - IPC

FIELD: plastic working of metals, in particular, manufacture of plated components of different sizes and shape from flat metal sheet. SUBSTANCE: method involves feeding metal sheet through press for performing at least two metal working operations: first cutting operation involves separating components from metal sheet, second cutting operation involves removing wastes of first operation; moving metal sheet by feeding unit along predetermined coordinate path whose horizontal axis coincides with direction of advancement of sheet through press; successively working sheet by portions positioned in direction of feeding sheet between front, rear and side edges and imaginary line extending in parallel with side edge and feeding direction. When one portion of sheet is completely worked, sheet is forced in the direction perpendicular to feeding direction so as to provide coincidence between subsequent portion of sheet and press. Components are produced by working succession of adjoining portions of sheet, which are formed as parallelograms having length at least equal to 30 mm. Upon completion of first operation, peripheral unworked waste portion is left, which is separated during the second angular cutting operation. Metal sheet and cutting tool are moved by means of programmed control device. EFFECT: increased efficiency, reduced production cost and wider operational capabilities. 7 cl, 5 dwg, 2 ex