Study on the characteristics of pressure variation in ASJ system
Abrasive water jet (AWJ) technology have been widely used for machining, while most commercial applications are based on the injection abrasive water jet (injection AWJ) technology. Compared with injection AWJ, abrasive suspension jet (ASJ) has higher energy efficiency. Under the same system pressure, the material removal rate by ASJ is up to five times higher than that by injection AWJ. This paper studied the pressure variation characteristics of ASJ machining system. Two models were built to describe the boosting and decompression processes of ASJ system. The decompression time of ASJ system can be predicted with the model of decompression process. The model of boosting process can be used to predict the target maximum pressure and the time consumption of boosting process, which are two important factors that have significant effects on the machining efficiency. The boosting process of the ASJ system is very important for machining. The influence of the compressibility of water and the friction resistance of the hydraulic system on the pressure variation characteristics of ASJ system during the machining process was also discussed.