Papers by Author: Hong Hong Gao

Abstract: Polylactide(PLA)-based wood plastic composites(WPCs) modified with SBS were manufactured by extrusion blending followed by injection molding. The fracture surfaces created from the impact test were recorded with SEM. Fractal analysis has been used to calculate the fractal dimension of the fracture surfaces with four different techniques. Then, the relationship between the fractal dimension of the fracture surfaces and its impact strength of the PLA-based WPCs was investigated with the linear regression nethod. The results showed that there is a positive correlation between the impact strength and the fractal dimension for each calculation method.

Abstract: A numerical control (NC) reformation scheme is presented to reduce the failure rate and improve the performance and efficiency of the old gear shaving machine. On the basis of study the mechanical structure and shaving methods, the numerical control system 828D and the servo driver S120 developed by Siemens Company are used to replace the old control system. The diagonal shaving method is selected to design shaving program after analysis of the process route. The reformation completed parametric programming, realized numerical control of the shaving machine and improved the reliability and flexibility of the system.