Theoretical and experimental investigation on influence of load control strategy of LY12 duralumin alloy bar fine cropping process

Abstract

In present work, both the theoretical solutions and the corresponding cropping experiments are carried out to investigate the influence of the load control strategy on bar fine cropping process. The working principle of the new proposed cropping method is detailed introduced. Five different types of the loading cycles are designed basing on it. A new proposed load control strategy with a suitable assumed constant stress intensity factor range is obtained theoretically and verified by the corresponding cropping experiments. According to a new proposed cross-section quality evaluation method, the comparative results show that the section quality and the cropping time are greatly influenced by the cropping load. The best quality is obtained by the loading cycle (iii).