1. State Key Laboratory of Mechanical Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710054, China;
2. Tianjin Sino–German University of Applied Sciences, Tianjin 300350, China;
3. Numerical Control Application Institute, Kede Numerical Control Co., Ltd., Dalian 116000, China
Abstract：In the processing of aerospace structural parts, in addition to the feed velocity, the feed acceleration and jerk also have an important influence on the processing time. Taking the fnishing process of the S–shaped fllet of the S–shaped test piece as an example, the influence of the feed velocity, acceleration and jerk on the processing time was studied using the Kede GNC61 CNC system. The possible effects of increasing velocity, acceleration and jerk on machine tool errors and S–shaped machining errors are analyzed. The results show that the increase of velocity, acceleration and jerk effectively reduces the processing time of S–shaped fllet. The feed velocity is increased from 1000mm/min to 5000mm/min, the acceleration is increased from 0.1m/s2 to 1.0m/s2, the acceleration establishment time is shortened from 200ms to 20ms, and the processing time of the S–shaped fllet is shortened by 24.20% , 25.38% and 41.84%. The problems caused by increasing speed, acceleration and jerk are increased setpoints bandwidth and increased excitation components. This makes it more diffcult to control the tracking error and trajectory error of the machine tool, and it is easy to excite the vibration of the machine tool mechanical structure.
2022, 
