硬质合金刀具铣削Ti6Al4V材料性能研究

Research on Milling Property of Ti6Al4V Material with Carbide Tool

Ti6Al4V材料具有良好的性能,广泛应用于航空、航天、医学等领域。这一材料属于典型难加工金属材料,对刀具的切削性能要求较高。对YG6硬质合金刀具干式铣削Ti6Al4V材料时的刀具磨损形态、切削力、切屑形态进行了研究,结果表明,在其它切削参数相同的条件下,低速切削时刀具磨损主要表现为粘结磨损、磨粒磨损、边界磨损。随着切削速度的加快,刀具磨损加剧,主切削刃出现微崩刃。在较高的切削速度和较大的进给量下,刀具磨损进一步加剧,刀尖处磨损最为严重,前刀面出现剥落现象。在进给量和切削深度保持不变的情况下,切削速度加快,切削力出现减小的趋势。YG6刀具切削Ti6Al4V材料容易形成节状切屑,这会对加工表面质量产生不利影响。

The Ti6Al4V material has good properties and is widely used in aviation, aerospace, medicine and other fields.This material is a typical difficult-to-machine metal material and requires high cutting performance of the tool.The tool wear shape, cutting force, and chip shape during dry milling of the Ti6Al4V material with YG6 carbide tool were studied.The results show that under the same condition of other cutting parameters, tool wear during low-speed cutting is mainly manifested as bond wear, abrasive wear, and boundary wear.As the cutting speed increases, tool wear intensifies, and the main cutting edge has micro chipping.At higher cutting speed and larger feed rate, tool wear is further intensified, with the most severe wear at the tool tip and spalling on the rake face.When the feed rate and cutting depth remain unchanged, the cutting speed increases and the cutting force tends to decrease.When the Ti6Al4V material is cut by YG6 tool, it is easy to form nodular chip, which will adversely affect the quality of the finished surface.