Experimental Study on Instantaneous Temperature Measurement of AISI 304 Stainless Steel in High-speed Milling of Hole
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摘要: 为揭示立铣刀磨损、破损机理,本文采用课题组自主研发的嵌入式刀柄系统,对难加工金属AISI 304不锈钢进行了不同冷却方式、铣刀转速和铣刀直径等变切削参数的测温实验研究,结果表明:主轴转速10 000 r/min时,由干式切削变为湿式切削最高切削温度可下降246℃;在相同刀孔比(1:1.5)干式铣削时,Ø12 mm铣刀比Ø20 mm铣刀测温点最高温度高500℃;湿式切削加工质量较高,圆柱度均小于0.02 mm,尤其是在深孔铣削加工时,内冷铣削优势更趋明显,为高速内冷铣削方式的推广应用提供参考。
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关键词:
- 温度测量 /
- AISI 304不锈钢 /
- 高速铣削 /
Abstract: In order to reveal the wear mechanism and breakage mechanism of the end milling cutter, a self-developed embedded temperature monitoring tool holder is adopted. The temperature measurement experiments of the difficult to machine AISI 304 stainless steel with different cooling methods, cutting speeds and cutter diameters were carried out. The results show that the maximum temperature decreases 246℃, from dry milling to cool milling at 10 000 r/min. At the same milling cutter and borehole ratio (1:1.5) and 6 000 r/min, the maximum temperature is higher 500℃ with Ø12 mm milling cutter than that with Ø20 mm milling cutter. The advantages of the cool milling include the higher quality of the machined borehole surface and the cylindricity is less than 0.02 mm. The advantage of internal cool milling is more obvious in deep-hole milling. The results provide a reference for promoting and applying the high speed internal cooling method.-
Key words:
- temperature measurement /
- AISI 304 stainless steel /
- high-speed milling /
- experiments
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表 1 AISI 304不锈钢化学成分
% 化学成分 Cu Si Fe V S Cr Ni 含量 0.86 0.74 70.18 0.18 1.67 18.53 7.85 表 2 实验方案
实验序号 刀径/mm 主轴转速/(r·min-1) 冷却方式 孔径/mm 每齿进给量/(mm·z-1) 每转下刀/mm 1 20 6 000 干铣 30 0.06 0.2 2 20 10 000 干铣 30 0.06 0.2 3 20 14 000 干铣 30 0.06 0.2 4 20 6 000 外冷 30 0.06 0.2 5 20 10 000 外冷 30 0.06 0.2 6 20 14 000 外冷 30 0.06 0.2 7 12 6 000 外冷 18 0.02 0.2 8 12 10 000 外冷 18 0.02 0.2 9 12 14 000 外冷 18 0.02 0.2 10 12 6 000 干铣 18 0.06 0.2 11 12 6 000 干铣 18 0.02 0.2 12 12 10 000 干铣 18 0.02 0.2 13 12 14 000 干铣 18 0.02 0.2 -
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