Patent ID: 7249478
Filing Date: 2007-07-31
Classification: B21D,Y10S

Abstract:
1. A work characteristic detector that detects a plate thickness of a work, comprising: a probe configured to move vertically and to bend the work in cooperation with a die; a sensor plate configured to move vertically relative to the probe and biased downward to be protruded downward by a predetermined length from a lower end of the probe; a position detector that detects a difference in relative vertical positions between the probe and the sensor plate, and a plate thickness calculator that calculates the plate thickness of the work based on reference position information obtained by the position detector when a tip of the probe and a tip of the sensor plate are used to measure a known reference plate thickness and measuring position information obtained by the position detector when the tip of the probe and the tip of the sensor plate are used to measure the plate thickness of the work.