高速切削Ti6Al4V钛合金时切削温度的试验研究

应用硬质合金刀具对Ti6Al4V钛合金材料进行了高速车削和高速铣削试验,研究分析了干切削、空气射流及氮气射流条件下的切削温度变化情况。研究结果表明,氮气射流及空气射流条件下的切削温度明显低于干切削条件下的切削温度,而氮气射流条件下的钛合金高速切削温度则略低于空气射流条件下的切削温度。

Experimental Study on Cutting Temperature in High Speed Cutting of Ti6Al4V Alloy

High speed cutting experiments were carried out for a widely used titanium alloy Ti6Al4V. Uncoated WC-Co cemented carbide inserts have been applied in the experiments. Within the range of cutting speeds employed (100 m/min～600 m/min), the cutting temperature has been investigated when milling and turning the titanium alloy. Comparisons were also made to study the influence of different cutting media such as air jet, nitrogen gas jet and dry cutting conditions on machining Ti6Al4V alloy. The results show that nitrogen gas jet is more suitable in decreasing the cutting temperature, and in improving the contact conditions at chip-tool interfaces during the high speed milling of Ti-6Al-4V alloy than air jet and dry cutting conditions. Nitrogen gas jet is an excellent cutting medium for green high speed machining of titanium alloy.