Patent ID: 6212933
Filing Date: 2001-04-10
Classification: B21D,B23Q

Abstract:
A back gauge device, for use in a processing machine, the processing machine having upper and lower tables, one of said upper and lower tables extending in an X-axis direction, at least one of the upper and lower tables being movable relative to the other of the upper and lower tables, the processing machine configured to process a workpiece using a die attached to one of the upper and lower tables, the back gauge device comprising:a pair of generally ""X""-shaped link mechanisms extending in a Y-Z plane formed by a Y-axis and a Z-axis, the Y-axis being orthogonal to the Z-axis, said Y-Z plane being orthogonal to the X-axis direction, each said link mechanism having a first link and a second link, each said first link and said second link having an upper portion, a central portion, and a lower portion, said first and second links pivotally connected to each other at their respective central portions;a pair of first driving mechanisms, each first driving mechanism of said pair of first driving mechanisms pivotally attached to a respective said link mechanism via said lower portions of said first and second links, each said first driving mechanism configured to move a respective said link mechanism along the Y-axis;a pair of second driving mechanisms, each second driving mechanism of said pair of second driving mechanisms pivotally attached to a respective said link mechanism via said upper portions of said first and second links, each said second driving mechanism configured to move a respective said link mechanism along the Z-axis in a first Z-axis direction by moving said respective upper portions of said first and second links toward each other, and further configured to move said respective said link mechanism along the Z-axis in a second Z-axis direction by moving said respective upper portions of said first and second links away from each other; anda stretch having opposed ends, each of said opposed end connected to a respective said second driving mechanism, said stretch having at least one abutment movable in at least the X-axis direction.