Wear mechanism model for grinding of PcBN cutting inserts
Wear mechanism model for grinding of PcBN cutting inserts
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DOI：
10.1016/j.jmatprotec.2019.116474
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发表时间：
2020-03-01
影响因子：
6.3
通讯作者：
Mueller-Cramm, D.
中科院分区：
文献类型：
--
作者：
Denkena, B.;Grove, T.;Mueller-Cramm, D.
立方晶体氮化硼（cBN）是一种高耐磨切削材料，用于黑色金属材料和高温合金的车削和铣削。由于其高硬度，这种切削材料只能用金刚石磨具进行机械加工。由于材料的高硬度和高温硬度，磨削工具磨损高。通过调整工艺变量进给速度、切削速度和振动，可以显著降低刀具磨损。基本的主要机制和派生的工艺参数进行了说明。接触长度特定的等效切屑厚度显着决定磨损机制。此外，晶粒接合的运动学数量受振荡频率的影响。对PcBN的加工提出了建议。
Cubic crystalline boron nitride (cBN) is a highly wear resistant cutting material used for turning and milling of ferrous materials and superalloys. Due to its high hardness, this cutting material can only be mechanically finished with diamond grinding tools. The grinding tool wear is high as a consequence of the high hardness and high temperature hardness of the material. By adjusting the process variables feed rate, cutting speed and oscillation, it is possible to significantly reduce tool wear. The underlying principal mechanisms and derived process parameters are described. The contact length-specific equivalent chip thickness significantly determines the wear mechanism. Further, the kinematic number of grain engagements is influenced by the oscillation frequency. Recommendations for processing of PcBN are deduced.