Research On Milling Tool Wear Model Based On Multi-scale Analysis

With the rapid development of science and technology,the modern manufacturing industry turns into green,efficient,intelligent and flexible manufacturing.As one of the main methods of milling machining,the cutting tool wear materials,bring greater influence on machining accuracy,so the research on the wear mechanism of the cutting tool in the cutting tool wear,and the establishment of the corresponding model is very necessary.In addition to the static strength failure,most of the common characteristics of wear debris formation is the fatigue of the material.Therefore,the fatigue mechanism can be regarded as the basis of various wear research.This paper is based on the mechanism of friction fatigue to derive the wear model of the flank of the milling cutter,to analyze the wear mechanism of the tool,to improve the quality of the workpiece and how to prolong the tool life.The main contents of this paper are as follows:(1)first,at the micro scale,the flank face of mill tool and the workpiece surface contact analysis,according to the mathematical statistics principle,establish the flank and the surface to be machined micro convex body contact model,after processing the corresponding equivalent of surface asperity contact model,construct the dynamic contact model of micro the convex body contact surface are used to derive the contact surface asperities in relative motion under the condition of the contact number.(2)the basic characteristics of theoretical analysis of surface asperity friction fatigue fatigue failure in the friction between the contact surface based on,through the establishment of micro convex body fatigue damage model to calculate the fatigue damage of tool flank surface asperity expression in dynamic contact action,namely the establishment of micro cutting tool surface fatigue wear model.Paired sample design and preparation of YG8 hard alloy material and 6061 Aluminum Alloy materials studied fatigue surface friction,fatigue wear performance analysis on YG8 hard alloy cutter with 6061 Aluminum Alloy and obtain the friction fatigue index tool and workpiece contact surface.(3)on the basis of the above research,the tool surface microcosmic fatigue wear model is calculated,and the macro fatigue wear model is obtained,and the analytical formula of the model is obtained.Milling aluminum alloy test,measured milling cutter wear to verify the correctness of the wear model deduced in this paper and the prediction accuracy.