干式高速正交车削钛合金的磨损演化与切屑形貌

M. Benghersallah, L. Boulanouar, G. List, G. Sutter
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摘要

本文是ti - 6al - 4v钛合金干式高速车削的实验研究。本研究的目的是了解在高切削速度下,刀片表面如何发生磨损,以及如何演变切削力和切屑形成。在圆柱形钛合金零件上,用硬质合金刀具H13A进行正交车削试验,切削速度分别为600、800、1000和1200米/分钟。利用三维显微扫描技术对磨损刀片进行了研究,发现弹坑是瞬间形成的,并且有切屑附着。焊屑导致碳化物颗粒脱落。在这些实验中,使用光学显微镜系统地研究了在每种切削条件下的切屑形状。收集制作的薄片并进行抛光,测量厚度t2max和t2min。对导言部分描述的各段之间的距离ch、倾角、剪切角、倾角进行了区分。在采集的切屑上实际测量的是剪切角,而剪切角无法测量。角h表示初始剪切,类似于描述原始剪切带中连续切屑形成的角h。切削力在取下刀具前增大并趋于稳定。芯片可以达到很高的温度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dry High Speed Orthogonal Turning of Titanium Alloy Wear Evolution and Chip Morphology
The present work is an experimental study on the dry high-speed turning of Ti-6Al-4 V titanium alloy. The objective of this study is to see for high cutting speeds, how wear occurs on the face of insert and how to evolve cutting forces and chip formation. Cutting speeds tested is 600, 800, 1000 and 1200 m/min in orthogonal turning with a carbide insert tool H13A uncoated and coated TiN on a cylindrical titanium alloy part. Investigation on the wear inserts with 3D microscope scanning revered the crater formation is instantaneous and a chip adhesion. Welded chip causes detachment of carbide particles. In these experiments the chip shape was systematically investigated at each cutting conditions using optical microscopy. The chips produced were collected and polished to measure the thicknesses t2max and t2min. The distance between each segments dch and ɸseg inclination angle as described in the introduction part, the shear angle ɸ and the inclination angle of a segment ɸseg are differentiated. ɸseg angle is actually measured on the collected chips while the shear angle ɸ cannot be. The angle ɸ represents the initial shear similar to the one that describes the formation of a continuous chip in the primary shear zone. Cutting forces increase and stabilize before removing the tool. The chip reaches a very high temperature.
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