Algorithm for the generation of mandrel protection curve and trajectory scheme for spinning machine

Spinning process is an effective and flexible method that has been widely employed to produce metal components having an axisymmetric rotational geometry, such as components for jet engines, turbines, radar reflectors, satellite nose cones, etc. Safe performance of mandrel and staff is critical to spinning process. In this paper, the safety aspects, i.e., temperature, leakage of hydraulic system, material deformation, roller path that related to spinning process operations, were in-depth analyzed. Moreover, a concept of mandrel protection curve was presented to avoid the potential dangers, and the relevance algorithm to generate mandrel protection curve was also developed. Then, based on the generation algorithm of mandrel protection curve, the redundant point problem was analyzed, and a new algorithm for rejecting redundant points was designed to enhance efficiency and safety. Finally, Multi-passes and constant linear velocity were adopted for higher product precision during complex spinning product manufacture. The common open-architecture CNC system and hydraulic servo system were used to realize the algorithm researches. The results show that the researched algorithms are effective to guarantee mandrel and staff’s safety and improve product precision.