微织构铣刀的制备及铣削性能

Preparation and milling performanceof micro textured surface milling cutter

为探究表面微织构的置入对铣刀切削性能的影响,实验研究微织构硬质合金刀具铣削特性,通过数学建模及仿真模拟设计微织构铣刀的织构形式和加工区域,在前刀面加工出不同微坑直径的表面微织构,研究三种微织构铣刀的应力分布及其强度,在铣削参数不变的条件下进行钛合金铣削实验,分析微坑织构对铣削力、表面粗糙度的影响,获得其减磨机理。结果表明,微坑织构的置入可以减小铣削力,实验条件下微坑直径为50μm时铣削力最小,且随微坑直径的增加铣削力也随之增加。采用微坑织构刀具加工的钛合金试件表面质量比无织构刀具的也有所提高,合适参数的微织构刀具可有效提高其铣削性能。

This paper aims to explore the influence of the surface microtexture placement on the tool milling performance by experimenting and studying the milling characteristics behind the micro-textured carbide tool. The study consists of designing the texture form and processing area of the micro textured milling cutter through mathematical modeling and simulation;analyzing stress distribution and strength of three kinds of micro milling cutter;Maching the surface microtexture placement with different diameter of micro pit on the rack face;performing the titanium alloy milling experiments with the unchangedmilling parameters to study the effect of micropit texture on milling force and surface roughness, and analyzing the antiwear mechanism comprehensively.The results show that the milling force can be reduced by using micropit milling cutter;and in the test, the milling force minimum appears with the micropit diameter by 50 μm, and the milling force increases with the increase of the micropit diameter. The surface quality of titanium alloy specimen processed by micropit milling tool is also improved compared with that plain cutter, and the microtexture tool with suitable parameters can effectively improve its milling performance.