Research On High-efficiency Processing Method Of Line Contact

Nowadays NC machining of complex surfaces generally adopts point-contact processing to complete.Adopting point-contact processing for complex surfaces generally requires a lot of cl data, this method is inefficient.With the development of finish machining,special machining and the mold’s finishing,it is becoming a researchful hotspot to improve the processing’s efficiency about the surfaces.In order to improve the efficiency of the surface machining,recently both high-speed cutting and line-contact milling have been proposed.High speed cutting is to improve the processing efficiency by increasing the speed of the spindle, and the line contact milling is to improve the processing efficiency by increasing the contact area and the surface of cutting tool. This paper mainly researches the method of high efficiency of line contact machining of curved surface.Starting with improving the ruled surfaces’efficiency, this paper researches on a new method of NC machining.This method increases the contact area of the cutting tools and parts, reduces tool round-trip times and shortens the tool path, thus the processing efficiency is improved. Because the speed of every point in the tool dege is equal, the surface quality of the parts is improved after processing.Starting from the ruled surface’s characteristic equation,we can analysis and deduce the line-contact machining ruled surface’s geometry.Through the analysis of the structure of the existing five axis machine tool,we can design of a high efficient linear contact tool path mechanism.Through the method of computer graphics,we can establish the matrix equation of the tool rotation and movement.Through the tangent method and the Bernstein curve equation,we can establish elliptic cone tool path.Amethod for machining curved surface is proposed based on the tool path-Line contact profile method.We can carry out surface in terpolation according to the curved surface equation.In this way,we can machining elliptic cone efficiently.Finally, carrying out the simulation test by CREO and comparing point-contact processing with line-contact processing.The result shows that line-contact contour surface method can efficiently machining elliptic cone.