Papers by Author: Chao Yu

Abstract: This paper took a titanium alloy thin-wall splined tube as the object of research, and mainly analyzed the influences of cutting force to machining deformation of part in turning process. The paper first introduced the structure composition and characteristic of splined tube, then established the mathematical model of cutting force in turning process according to the orthogonal experiment method and the multiple regression algorithm, and finally the influences of cutting force to machining deformation of splined tube was carried on the simulation analysis with the aid of the finite element analysis software under the different cutting conditions. The conclusions of research in this paper will have important practical significance to reduce the machining deformation of thin-wall part and optimize the cutting parameters of difficult-to-machine material.

Abstract: This paper took the grinding force in the heavy load honing as the object to research, it mainly analyzed the influence of the grinding force to the material removal rate. First the mathematical model of grinding force was established from starting with the honing pressure. Then the mathematical model of material removal rate was established according to the relationship between material removal volume and honing pressure. Finally the influence of the honing pressure to the material removal rate was analyzed with the aid of software. The results of this paper have important theoretical significance to optimize the processing technology of heavy load honing and further enhance the machining precision and the honing efficiency.

Abstract: The temperature of thermohydrogen treatment for the testing workpieces respectively was 650°C,750°C,850°C. By turning testing workpieces of different hydrogen content Ti6Al4V alloy, measuring cutting force and surface roughness as well as observing chip morphology, the effect of themohydrogen treatment temperature on machinability of Ti6Al4V alloy has been studied. Results of this experiment indicate that machinability of Ti6Al4V alloy improves with increasing the temperature of thermohydrogen treatment at the range of experimental temperature.

Abstract: This paper takes a kind of 3-UPS Parallel Machine Tool (PMT) as the objective of research. First, the kinematic analysis is carried out to the machine and the kinematics equation is obtained. Then, the mathematical model on tool posture error of this machine is established in considering the joint gap based on the kinematics equation. According to the mathematical model expression, the posture error of tool tip point can be calculated when the specific values to the length error of the driving rod and the position error of the joint point are known. The establishment of error model has important theoretical significance to the design as well as the error analysis and compensation of this Parallel Machine Tool.