Study On Process And Surface Roughness Of Ruled Surface By Wedm

With rapid development of science and technology, it is hard to machine high precision workpieces with complex spatial curved surface in small quantities only by means of cutting for some industries. Machining spatial curved surface by using NC worktable which offers the linkage of rotation, swing and swing on traditional machine tool of wire electro discharge machining(WEDM) is one of effective methods.(1) According to the motion law and machining characteristics of WEDM for ruled surface, a new method is developed by using the five axis machining module of CAM software for solving the problem of the previous manual programming, by which we can identify the complex ruled surface and calculate the tool path in accordance with the machining characteristics, and the subsequent post-processing algorithm is deduced.(2) A polar coordinates processing system is established, the relative speed between wire and workpieces is analyzed under the system. A general mathematical model of this coordinate system is established, the laws of the relative speed with several typical ruled surfaces are deduced through the model.(3) A small numerical Control Turntable is designed according to the requirements of WEDM to meet the needs of industrial production, its mechanical structure and the control part are discussed in detail.(4) The taper and flat cutting experiments are conducted in Wire Electronic Discharge Machining with High Speed(WEDM-HS) to explore the impact of cutting speed on Surface Roughness. The temperature fields of spark discharge are simulated in the situation of strong convective to get the discharge dent general shape. The mathematical model of the surface morphology is set up according to the simulation results.