Papers by Author: Jian Xin Su

Abstract: Machining parameters optimization in face-milling the hypoid gear was often needed in order to obtain lowest cost or highest productivity. In this study, the optimum value of machining parameters including feed rate, rotation speed are obtained using improved harmony search algorithm(IHSA), to yield minimum total time while considering constrains such as allowable cutting speed, tool life and machine tool capabilities. Results indicate that the IHSA converged to optimum solution with similar accuracy in comparison with the genetic algorithm (GA).

Abstract: A software system for CNC dressing involute grinding wheel was developed. When the ordinary grinding wheel was used in gear form grinding, the key was to handle the on-line dressing of involute wheel. Based on involute generation principle, an algorithm by taking straight line to approach involute with equal error was mainly studied. The NC program for dressing involute wheel was prepared by using VC++6.0 as programming tool, and wheel dressing experiment was completed. Experimental result shows that the proposed algorithm is valid，and the developed program is feasible with friendly interface. The success of this software system lays the foundation for further developing CNC gear form grinding system.

Abstract: Applying reverse engineering technology to the design of engine port, the reconstruction technology on the free-form surfaces of the engine port were investigated deeply. The data on the 3D surfaces of the engine port sample were collected by means of laser scanner, and the scattered data points were processed in regularization. Triangulation processing of surface data cloud was carried out based on surface grid method. According to the free-form surface technology and curve fitting algorithm used at present, the methods used to reconstruct the port surface were proposed. Taking CATIA software as developing platform, the free-form surfaces of the engine port were reconstructed.

Abstract: Gear form grinding is an efficient finish machining method for the gears with hard face. There are many factors which have an influence on tooth error in grinding process. In addition to the form error of form grinding wheel, the radial feed depth of grinding wheel has large impact on the tooth error. Based on the principle of gear form grinding, the influence of wheel feed depth on tooth error is analyzed theoretically. The magnitude of error is also analyzed quantitatively according to the simulation result obtained by means of tooth error analysis module, which is developed based on VC + +6.0 software analysis. The research result has a certain reference value for preparing CNC form grinding process and setting machine tool properly.

Abstract: Based on grinding force formation theory and the surface grinding force formula, the formula of gear form grinding force is obtained by integrating the grinding force in unit width along the involute direction. Simulation analysis and inspection result show that the mathematical model of gear form grinding force is validated. This research is helpful for selecting the technological parameters rationaly in gear form grinding, controlling the wheel dressing and ensuring gear grinding quality.

Abstract: Aiming at the dressing of involute grinding wheel, the mathematical model of involute interpolation is established. Taking the normal tolerance δ as accuracy index, the dense degree of interpolation points can be changed constantly with the change of developable angle increment △θ so that the numbers of interpolation points can meet the requirements not only for interpolating accuracy, but for interpolating efficiency. The wheel dressing software developed by using VC++ as programming tool can be applied for dressing the involute grinding wheel which can be used to grind involute gears with different teeth and modules. The results of simulation experiment verify the feasibility and correctness of the software.