PLATE THICKNESS DETECTION, PLATE THICKNESS DIFFERENCE DETECTION AND BENDING MACHINE FOR PLATE-SHAPED MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a detecting method of plate thickness and a detecting method of plate thickness difference precisely detecting the plate thickness of a plate-shaped work/without errors in line, and to provide a bending machine for a plate-shaped work.;SOLUTION: The bending machine for a plate-shaped work equipped with a punch P and a die D is provided with a measuring device 67 for detecting a gap between the lower face of a measurement position of a plate-shaped work W mounted on the die D and the upper face of the die D, a position detection device which detects a relative approaching position of the punch P to the die D, a contact detection means which detects a contact of the tip of the punch P with the upper face of the plate-shaped work W, and an arithmetic means which calculates the plate thickness of the plate-shaped work W on the basis of the detected value of the position detection device given when the contact detection device detects the contact, and the measuring device 67.;COPYRIGHT: (C)2001,JPO