SHEET WORKING METHOD, SHEET WORKING SYSTEM, AND VARIOUS DEVICES RELATED TO SUCH SYSTEM

摘要

Actual sheet thickness and material constants are measured at the time of punching prior to bending and this measurement information is reflected on bending, whereby efficient accurate bending is effected. Each blank developed on the basis of nominal sheet thickness and nominal material constants of work (W) in the blanking step prior to the bending of the work (W) is punched, and the actual sheet thickness and material constant distribution of the work (W) are calculated on the basis of the ram stroke detected during punching and various data on pressure.