Processing Mechanism Ball Milling Tool Steel And Wear Failure Research

In recent years, high-speed milling of mold manufacturing technology research has been widely used in mold shaping automotive and aerospace machining and other parts of. Among the many and complex cavity mold free surface contour milling parts, high material removal rate, forming a multi-degree of freedom as the milling feed characteristics of high-speed milling cutter ball more and more obvious advantages. But with the ball in the high-speed milling cutter process affect poor working conditions, high hardness, high strength steel in the mold milling process, will produce a large milling force and milling heat, so that the cutter wear and fatigue failure will increase, shortening the life of the ball-cutter, reducing the quality of ball milling cutter, affecting surface quality and precision die steel work piece.Aiming Ball milling cutter mold steel processing speed of wear failure situation, in order to enhance and improve Ball Milling die steel processing quality as the goal. On the basis of ball-cutter "S" shaped curve model and milling blade angle change before and after the impact of Ball Milling performance for the analysis of ball speed ball milling tool steel cutter chip formation mechanism model analysis done; The results show that the shape of Ball Milling cutter blade helix angle associated with a reasonable set of tools spiral helix angle can be increased to improve before the actual milling cutter angle, impact resistance and reduced milling chip deformation.For more in-depth analysis of ball-cutter high speed steel milling process mold milling force and milling the chip temperature changes caused by shear slip deformation, it was established a two-dimensional Cartesian infinitesimal Milling simulation models and three-dimensional simulation of high-speed ball milling model, from the perspective of microscopic observation and analysis of transient state during the milling force and milling heat generation change in chip formation; analysis showed that from the ball-cutter knife to smooth milling, forming the chip will go through three stages, from hard Collision exposure to tear the plastic deformation under the effect of thermal softening, and chip rake face and "S" shaped spiral curl face squeezed climb tearing chip process.By combining high-speed milling cutter ball mold steel single factor experiment and change with minimal force in order to optimize the milling orthogonal experiment, analyze the process parameters(milling speed, feed rate, axial depth of cut) on the milling force, milling heat, Chip Shape and affect the relationship between cutter wear, and the optimum milling parameters optimization ball milling speed ball milling SKD61 mold steel; and comparative study of the impact of the application of the coating technology of Ball End Milling performance observed ball milling process the whole form gradually wear, summed up the general principles to enhance the high-speed milling cutter ball mold steel quality.