Study on the characteristics of the materials and manufacturing quality to shrapnel-type couplings properties

Abstract

With the development and application for the ultra-precision machinery industries and smart machinery have become prosperous. The precision transmission sub-system is an important part of the precision machinery equipment and smart machinery industries. Then shrapnel-type coupling is an important part of the precision transmission system. In the shrapnel-type couplings with high precision, high reliability, and high efficiency. The design of shrapnel-type couplings needs to correct and improved in the manufacturing with very high-precision inspection equipment, and expert measurement technology. The high quality of shrapnel-type couplings, materials and manufacturing qualities are the main factor for high precision, high reliability, and high efficiency. This paper will be a depth study of the body materials and manufacturing qualities of shrapnel-type couplings. The inner hole contact surfaces of the shrapnel-type couplings to connect between each other connecter tested the properties of the coupling via toque-torque angle testing equipment with changing the shrapnel-type couplings body materials and manufacturing different roughness of inner hole. The key characteristics that affect the torsional rigidity and failure torque of the coupling grasped are found out using the self-developed toque-twist angle testing machine. The body of the shrapnel-type couplings made with 7075 aluminium alloy and 6061 aluminium alloy. Through experiments, we can understand the influence of different materials bodies on the torsional rigidity and failure moment of the shrapnel-type couplings. From experimental results, that 7075 aluminium alloy is better than 6061 aluminium alloy of torsional rigidity or failure moment. As the inner hole surface roughness of the shrapnel-type couplings smaller has a higher failure torque of coupling.