Predictive models for flank wear on coated inserts
Predictive models for flank wear on coated inserts
复制标题
涂层刀片后刀面磨损的预测模型
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发表时间：
2000
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通讯作者：
P. Kwon
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文献类型：
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作者：
P. Kwon
本文的目的是建立后刀面磨损的预测模型，明确地将切削温度和涂层和工作材料的物理性能。这种模型的发展可以最大限度地减少耗时的加工实验，在预测刀具寿命，建立后刀面磨损模型，可适用于广泛的涂层刀片和工作材料。为了开发这样的模型，进行了一组实验，以了解由于工件材料中的第二相的形态和量对后刀面磨损的影响。对热轧（珠光体）和/或球化条件下的AlSl牌号1018、1045、1065、1070和1095的普通碳钢进行车削。切削试验中使用了TiN、TiCN或Al 2 O3单涂层刀片.在切削过程中，通过使用带有光纤附件的红外高温计测量了前刀面上远程位置处的温度历史。Yen和Wright（1986）利用该温度信息，采用逆估计方案来估计稳态工具-芯片界面温度。然后，使用奥克斯利（1989）提出的方案，将结果用于预测工作工具界面温度。实验结果表明，对于球化钢，单位滑动距离的后刀面磨损（后刀面磨损率）随稀土含量的增加而增加。对于热轧（珠光体）钢，没有确凿的证据表明，相关的侧面磨损率与珠光体含量。然而，对于珠光体钢的磨损率，在一般情况下，被证明是增加与侧面温度，而球化钢的速率降低与侧面温度。这些趋势的原因可以通过珠光体钢和球化钢之间的显微组织差异来解释;因此，Rabonowicz（1967）和Rabinowicz等人（1972）开发的两体和三体磨损的半经验模型可以用于描述后刀面磨损过程。
The purpose of this paper is to develop predictive models for flank wear that explicitly incorporate cutting temperature and the physical properties of coatings and work materials. The development of such models can minimizes time-consuming machining experiments in predicting tool life by establishing flank wear models that can be applied to wide classes of coated inserts and work materials. To develop such models, a set of experiments was performed to understand the effect on flank wear due the morphology and amount of the second phase in work materials. The plain carbon steels of AlSl designation 1018, 1045, 1065, 1070, and 1095 in hot-rolled (pearlitic) and/or spherodized conditions were turned. The inserts with a single coating of TiN, TiCN, or Al 2 O 3 were used in the cutting experiments. The temperature history at a remote location on the rake face was measured during cutting by using an infrared pyrometer with a fiber optic attachment. This temperature information was used to estimate the steady-state tool-chip interface temperatures using the inverse estimation scheme by Yen and Wright (1986). The results were then used to predict the work-tool interface temperature using the scheme suggested by Oxley (1989). The results of this experiment showed that, for the spherodized steels, flank wear per sliding distance (the flank wear rate) increased with the cementite content. For the hot-rolled (pearlitic) steels, no conclusive evidence was found that correlates the flank wear rate with the cementite content. However, for pearlitic steels the wear rates, in general, were shown to increase with the flank temperature while for spherodized steels the rates decrease with the flank temperature. The reason for these trends can be explained by the microstructural difference between pearlitic and spherodized steels; therefore, the semi-empirical models of two-body and three-body wear developed by Rabonowicz (1967) and Rabinowicz et al. (1972) can be applied to describe the flank wear process.