Study on Cutting Force in High Speed Milling of Laser Cladding Ti-6Al-4V
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摘要: 为了研究激光熔覆Ti-6Al-4V这类材料的高速切削加工性能,探明高速铣削切削力的影响机制,采用硬质合金刀具侧铣工艺对激光熔覆和铸造钛合金进行高速铣削的对比实验研究。结果表明,激光熔覆Ti-6Al-4V铣削时出现明显的各向异性,其中沿熔覆轨迹0°方向铣削时切削力最大,90°方向铣削时切削力最小,且各方向铣削力均低于铸造型钛合金。钛合金铣削过程中,当切削速度超过400 m/min时,铣削主切削力呈明显降低趋势。此外,铣削参数每齿进给量和铣削深度是影响切削力变化最显著的因素。Abstract: Laser cladding Ti-6Al-4V has been widely used in aerospace because of its excellent comprehensive properties. In order to study the high-speed cutting performance of laser cladding Ti-6Al-4V and explore the influence mechanism of high-speed milling cutting force, a comparative experimental study onhigh-speed milling of laser cladding and cast Ti-6Al-4V was carried out. The results showed that there was the obvious anisotropy in the milling of laser cladding Ti-6Al-4V, in which the cutting force was the largest in a direction of 0° along the cladding path, and the smallest in a direction of 90° along the cladding path, and the cutting force in all directions was lower than that of cast Ti-6Al-4V. In addition, when the cutting speed was more than 400 m/min, the main cutting force decreased obviously. The feed per tooth and milling depth of milling parameters were the most significant factors affecting the cutting force.
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Key words:
- high speed milling /
- cutting force /
- titanium alloy /
- laser cladding
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表 1 熔覆TC4粉末成分组成
% w(Al) w(V) w(Fe) w(C) w(N) w(H) w(O) w(Ti) 5.5 3.5 0.3 0.1 0.05 0.015 0.2 余量 表 2 铣削实验参数表
类型 实验参数 铣床型号 FANUC-robodrill α-D14MiA立式加工中心 铣削方式 侧铣 加工材料 激光增材TC4 铣刀类型 Walter WMG40硬质合金刀具 铣刀直径 20 mm 刀具刃数 2 刀具参数 前角12°,后角14°,螺旋角35° 冷却方式 50 L/min,乳化液( 5%) 铣削速度v 100,200,400, 600,800 mm/min 每齿进给量fz 0.02,0.04,0.06, 0.08,0.10 mm 切削深度ae 0.4,0.6 ,0.8,1.0,1.2 mm -
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