Study on turning force of γ-TiAl alloy
Study on turning force of γ-TiAl alloy
复制标题
γ-TiAl合金车削力研究
DOI：
10.1007/s00170-019-04356-z
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发表时间：
2019-12-01
影响因子：
3.4
通讯作者：
Wang, Zhenhua
中科院分区：
文献类型：
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作者：
Cheng, Yu;Yuan, Qin;Wang, Zhenhua
γ-TiAl合金是一种具有广阔应用前景的先进材料，但其加工是众所周知的工程难题。本文通过多次车削实验，得出了硬质合金刀具切削参数的最佳范围。事实上，刀具磨损对切削力的影响很大。后刀面磨损宽度、切削速度、切削深度和进给量这四种主要影响对车削力的影响已经进行了仔细讨论。同时建立了γ-TiAl合金的车削力模型。该模型研究了前刀面的切削力和后刀面的磨损作用力。通过拟合大量的实验结果确定了几个关键系数。后来检查了准确性。实验结果表明，刀具寿命普遍较短，刀具磨损严重。在切削速度为50 m/min时，进给量不超过0.1 mm、切削深度不超过0.3 mm时，刀具寿命相对较长，表面质量相对较好。在此范围内，切削力与切削深度和进给速度近似呈线性关系。另外，切削力会随着后刀面磨损宽度的增加而显着增加。事实证明，该模型具有较高的精度，能够较好地反映切削力的变化。
gamma-TiAl alloy is an advanced material with a vast prospect of applications, but its processing is a well-known engineering problem. In this article, the optimum range of cutting parameters of cemented carbide tool has been obtained by several turning experiments. In fact, tool wear has a great effect on cutting force. These four major effects, flank wear width, cutting speed, cutting depth, and feed rate on turning force, have been carefully discussed. Meanwhile, the turning force model of gamma-TiAl alloy has been established. This model studied both the cutting force on rake face and the wear effect force on flank face. Several key coefficients have been determined by fitting the extensive experimental results. Later, the accuracy has been examined. The experimental results show tool life is short and tool wear is intense in general. At the cutting speed of 50 m/min, when feed rate does not exceed 0.1 mm and cutting depth does not exceed 0.3 mm, tool life is relatively longer and surface quality is relatively better. Within this range, the cutting force is approximately linear with respect to the cutting depth and the feed rate. In addition, the cutting force will increase significantly with the increase of the flank wear width. It turns out the model has a higher accuracy and it can appropriately reflect the change of cutting force.