ANALYSIS OF THE INFLUENCE FACTORS FOR ERICHSEN TEST
FU Quan-ke, Xun Jian-min · Physical Testing and Chemical Analysis · 2004
Batches of oil-barrel plates in various thickness are processed by GBS-60 digital automatic cupping machine. The thickness and blankholding force are two major factors which influences the accuracy of cupping value. Tests are proved that the cupping value is increased in accordance with the increase of thickness, while it is decreased with the increase of the blankholding force. The most proper cupping speed should be 10mm/min due to the mechanical influence of testing machine. Meanwhile it is necessary to follow the standard GB/T4165-1984 Cupping Testing Method of Metal strictly and follow the operating rules of GBS -60 digital automatil cupping machine in order to gain the accuracy testing result.