The Study Of The Cutting Theory And Structure Optimization Of The Bicylinder Cutting-off Insert

Mental cutting production is normally finished by means of tooling. The tools play a vital role in metal cutting process. In order to improve the production efficiency, we should give more consideration to the tools. The cut-off tools are mainly used in cutting off, grooving, undercutting etc. Metal cutting is a complex deformation process. Common cutting-off tools can cause serious chatter during cutting, which even cause breakdown. Free cutting facilitates chip removal, this help to cut smoothly.In this paper, the principal of the bi-cylinder cutting-off tools is studied. Through experimental analysis of the bi-cylinder cutting-off tools, come up with a structural improvement about a new cutting-off tool that based on the bi-cylinder cutting-off.The new cutting-off tool can be disigned whose rake and flank face are made up of three equal-diameter cylinders, which gives stable three-point supporting for the rake face and flank of the tools. The three equal-diameter cylinders run through one another, this results the cutting edge by the spatial curves not in the same plane. Chips are removed smoothly along the rake face, which makes the free cutting possible. Thanks to be convex in the middle and concave in both sides, the rake face can cause chips shrinkage in radial direction, reducing blockage. The crack automatically appears in the two sides of the chip, this make it is for the chip to break.Taking the tool's life as the design objective, through optimization of the tool's geometric parameters and orthogonal experiment, the optimized solutions can be acquired by analyzing the experimental results based on range analysis method. The new style cut-off tools can realize the smooth cutting, make its life become longer and improve the cutting efficiency.