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首页> 外文期刊>Journal of Manufacturing Processes >Comparison of cryogenic cooling strategy effects on machinability of milling nickel-based alloy
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Comparison of cryogenic cooling strategy effects on machinability of milling nickel-based alloy

机译：低温冷却策略对铣削镍基合金可加工性的影响

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摘要

Liquid nitrogen (LN2) cooling can play a green manufacturing role for nickel-based alloy materials, and it is credible for industrial applications and being popularized. A predict model of LN2 consumption was established considering cooling effect. Meanwhile, a series of processing tests were executed including in flood, LN2 external spray and LN2 inner injection cooling strategies. The different cooling effects on the machining accuracy, required LN2 flow and tool wear were investigated for 3 cooling strategies in detail. The results show that the cutting temperature is more than 400 degrees C for flood cooling, but it is less than 0 degrees C for LN2 ones at high speed. Moreover, the inner injection strategy can economize more LN2 consumption compared with external spay one. When the cutting zone is required lower cooling temperature, LN2 consumption of inner injection is less half than that of external one. Besides, the tool durability and workpiece processing performances of LN2 cooling are all increased than flood one. In contrast to flood cooling, the tool life based on LN2 cooling can be improved about 1 time. In addition, compared with LN2 external spray, the inner injection cooling has more than 5 min extension at high speed as well as 10 min at low speed. Furthermore, LN2 inner injection has also a weaker impact on the alloy microhardness and cutting force. Therefore, the study can confirm that LN2 inner injection cooling strategy is advantageous compared with external spray for LN2 cooling application.
机译：液氮（LN2）冷却可以为镍基合金材料发挥绿色制造作用，可靠的工业应用并受到普及。考虑冷却效应建立了LN2消耗的预测模型。同时，执行了一系列处理测试，包括洪水，LN2外部喷雾和LN2内注射冷却策略。对加工精度的不同冷却效应，需要详细研究了3种冷却策略。结果表明，用于洪水冷却的切削温度超过400℃，但在高速时，LN2较小的距离小于0摄氏度。此外，与外部喷涂相比，内部注射策略可以节省更多LN2消耗。当需要切割区较低冷却温度时，内部注入的LN2消耗量小于外部的一半。此外，LN2冷却的刀具耐用性和工件处理性能比洪水更大。与洪水冷却相比，基于LN2冷却的工具寿命可以提高约1次。此外，与LN2外部喷雾相比，内注射冷却在高速和10分钟内具有大于5分钟的延伸，低速10分钟。此外，LN2内注射也对合金微硬度和切割力产生较弱。因此，该研究可以确认与LN2冷却施加的外部喷雾相比，LN2内注射冷却策略是有利的。

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