Patent ID: 6505535
Filing Date: 2003-01-14
Classification: B21D,Y10T

Abstract:
A method for manufacturing a plurality of press-formed objects having different sized holes, said method comprising:feeding a sheet of material along a path through a press in a first direction, said press forming a plurality of first holes in said sheet; feeding said sheet of material through said press in a second direction, said second direction being along said path but opposite in direction to said first direction, said press forming a plurality of second holes in said sheet, said second holes being at different locations from said first holes; said first holes are formed at a first acute angle with respect to a plane normal to a horizontal plane of said sheet, said second holes are formed at a second acute angle with respect to a plane normal to a horizontal plane of said sheet and, cutting said sheet to form said plurality of press formed objects, wherein feeding said sheet of material through said press in said first direction is accomplished using a first feeder and feeding said sheet of material through said press in said second direction is accomplished using a second feeder, and wherein during feeding, said press, said first feeder and said second feeder are fixed relative to a floor on which they are situated, and wherein said press comprises a support table unit which supports a first die set said support table unit made up of a rotatable table mechanism for rotating the die set in a horizontal plane parallel to said sheet of material and an angle table mechanism for moving said die unit about a vertical axis perpendicular to said sheet of material; said method further comprising rotating said die set about said vertical axis after feeding said sheet in said first direction and before feeding said sheet in said second direction.