Papers by Author: Wei Hua Wu

Abstract: Based on milling experiment to explore the transformation and stress condition in the process of cutting of the thin-wall part made by aviation aluminum alloy, and then get data from the milling experiment through altering the axial cutting depth Ap=1 mm (a=1 mm), cutting radius Ae, spindle speed n and feed per tooth for milling force fz. Considering the milling force coefficient affected by each milling parameters, the orthogonal experiment of four factors and four levels are designed, and the milling coefficient is solved by MATLAB. The results indicates that the axial cutting depth Ap=1 mm (a=1 mm), the cutting force Fx increases with increasing in feedrate per tooth fz (c). the feedrate per tooth fz=0.03 mm (c=0.03 mm), the cutting force Fx increases with increasing in the axial cutting depth Ap. The discipline that the milling coefficient has an influence on milling force is obtained from the research which can provide the reference on the purpose of optimizing milling coefficient.

Abstract: In order to articulate the modal change in the whole processing blades, take the finite element method to establish the simulation model of blades and blank remains, and then get the results of blade model with material removal. According to the blades processed vibration characteristics, to perform an experiment on the six different removal blades. The results show that material removal has a great effect on the modal frequency in the processing of blades, which is increasing constantly. The first-order frequency and the second-order frequency in material removal that are about 12 mm and 7 mm don’t reach a maximum and then show a decreasing trend until the completion of processing. Effectiveness of experimental results is verified since simulation results are well consistent with experimental results, which offers a reference for choosing the parameters of blades process and studying three-dimensional vibration mechanism.

Abstract: Aiming at the issues of cumbersome modeling process and complicated programs, the hydraulic system simulation software automation studio is introduced, which is based on system schematic diagram. Taking the hydraulic system of deep hole drilling machine for example, by using automation studio, the motor’s input pressure and flow are simulated and studied, and this system is debugged on bosch rexroth experiment table, the parameter test results are basically the same with their simulation results. This simulation method can accurately simulate the system’s working state, simplify the process of modeling and parameter adjustment, and provide a good way for hydraulic system design and dynamic characteristic study.