Papers by Author: Shi Chun Yang

Abstract: As a kind of precise surface finishing technology, magnetic abrasive finishing has wide application, low cost, high efficiency, good effects, and other advantages. Magnetic induction intensity is one main parameter affecting finishing effect and efficiency of magnetic abrasive finishing. Saturation magnetic induction intensity for different magnetic abrasives is defined through test device designed by ourselves. Affecting rules of saturation magnetic induction intensity is discussed by experiments, which provide basis for parameters selection and practical application of magnetic abrasive finishing.

Abstract: For the precise hole surface, the burr severely affects products’ performance. Considering the specific conditions of the precise hole surface finishing, a new method of two-phase compulsive circulation flows finishing is brought up. On the basic premise of defining k-ε model, numerical simulation of finishing project is done and its feasibility is defined. Experimental equipment is designed, especially, component of circulation flows formation is analyzed in detail, which provide experimental basis for process parameters and thorough research.

Abstract: A new finishing technology of the swirling airflow compounded with magnetic-field is advanced. Magnetic field simulation and flow field simulation are done through ANSYS and computational fluid dynamics (CFD) software. Unthreaded hole is experimented on the basis of simulation. Research indicates that the swirling airflow compounded with magnetic-field finishing is feasible and adding magnetic field may avoid the ununiformity of the swirling airflow finishing as well as increase finishing effect. It provides credible theoretic basis for technology improvement.

Abstract: For precise hole surfaces, the burr severely affects products’ performance and service life. Considering specific conditions of hole surface finishing, a new method of gas-particle two-phase swirling flows finishing is brought up. By experimental analysis, finishing effect and axial uniformity are defined, which provides credible basis for thorough research, equipment design and industrial application.

Abstract: At present, crankshafts are finished mostly by abrasive cloth and manual steel brush, which is not ideal on finishing quality, efficiency, cost and cleanness degree. So a new process, horizontal spindle barrel finishing, is developed. Based on its finishing mechanism, factors and effect affecting finishing uniformity are analyzed by theory and experiment, finishing effect is defined, which provides basis for parameters selection of crankshafts barrel finishing.

Abstract: As a kind of precise surface finishing technology, magnetic abrasive finishing has wide application, low cost, high efficiency, good effects, and other advantages. Finishing clearance is one main parameter affecting finishing effect and efficiency of magnetic abrasive finishing. Affecting rules of finishing clearance and filling volume are discussed by experiments, which provide basis for parameters selection and practical application of magnetic abrasive finishing.

Abstract: The small hole EDM is one main method of micro holes machining and applied very widely. But it’s machining efficiency is low and machining stability is bad, which is more obvious because of chip-ejection difficulty when the ratio of length to diameter is rather large. Secondary discharge caused by chip-ejection difficulty not only makes the material removal rate reduce, but also causes geometric tolerance and affects product performance. Based on dispersion mechanism study of the water dispersant, the influence of the water dispersant is analyzed to chip-ejection, material removal rate and machining quality of the high-speed small-hole EDM. By contrasting the machining effect on using tap water with disperser dielectric liquid during electric spark small hole machining, adding the certain proportion disperser in water-based dielectric liquid may increase the material removal rate, decrease the tool wear rate, improve the effective impulse numbers, obviously reduce the second discharge number, and the taper of tool electrode and hole becomes small, so the hole machining quality enhances.

Abstract: For the precise hole surface, the burr severely affects products’ performance. Considering the specific conditions of the precise hole surface finishing, a new method of gas-particle two-phase swirling flows finishing is brought up. By theoretic analysis, equipment parameters, nozzle angle, nozzle diameter, nozzle quantity, nozzle displacement, etc., affect finishing quality and efficiency. Numerical simulation of equipment parameters is done through CFD software (Fluent, Gambit), which provides credible basis for thorough research and equipment design.

Abstract: At present, crankshafts are finished mostly by abrasive cloth and manual steel brush, which is not ideal on finishing quality, efficiency, cost and cleanness degree. So a new process, horizontal spindle barrel finishing, is developed. By theoretic research and simulation, main factors for finishing effect and uniformity are analyzed. The research indicates that this process is very effective for crankshafts, and has also positive influence on efficiency and auto product line.

Abstract: A new swirling airflow finishing process is put forward mainly for hole surface. Flows field analysis is done through computational fluid dynamics (CFD) software. Abrasive velocity along axis length according to nozzle elevation and abrasive diameter are shown. Unthreaded hole is experimented on the basis of simulation. Experiment results are consistent with simulation research and it provides credible theoretic basis for process improvement. The successful application of this technology may meet deburring and finishing of complicated parts as crossed holes, stepped holes and winding pipe as well as unthreaded holes.