Modeling and Application of Process Damping in Milling of Thin-Walled Workpiece Made of Titanium Alloy
Modeling and Application of Process Damping in Milling of Thin-Walled Workpiece Made of Titanium Alloy
复制标题
钛合金薄壁工件铣削过程阻尼建模及应用
DOI：
10.1155/2015/431476
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发表时间：
2015-01-01
影响因子：
1.6
通讯作者：
Chi, ShengWei
中科院分区：
文献类型：
--
作者：
Li, Xin;Zhao, Wei;Chi, ShengWei
研究了过程阻尼在钛合金薄壁工件铣削加工中的建模及其应用。航空工业中常用的钛合金是一种典型的难加工材料。钛合金在切削加工过程中经常出现颤振现象，导致钛合金表面质量差，刀具损坏。因此，颤振是制约钛合金制造质量和效率的一个重要因素，特别是对于结构刚度差的薄壁钛合金工件。加工阻尼是由加工表面与侧面之间的干涉引起的，这在难加工材料的颤振分析中很重要，但通常被忽略。提出了考虑工艺阻尼的钛合金薄壁工件铣削非线性动力学模型，并在此基础上设计了抑制颤振的减振间隙角。实验和计算结果表明，所提出的颤振稳定性分析方法是合理的，所设计的减振间隙角能够有效地抑制颤振，提高加工质量。
The modeling as well as application of process damping in milling of thin-walled workpiece made of titanium alloy is investigated. Titanium alloy used commonly in aviation industry is one typical difficult-to-machine material. Chatter usually occurs in cutting of titanium alloy, which results in poor surface quality and damaged tool. Thus, chatter is one important restriction for the quality and efficiency of titanium alloy manufacture, especially for the thin-walled workpiece made of titanium alloy due to poor structural stiffness. Process damping results from interference between flank face and machined surface, which is critical but usually ignored in chatter analysis for difficult-to-machine material. The paper presents one nonlinear dynamic model considering process damping for milling of thin-walled workpiece made of titanium alloy and designs antivibration clearance angle to suppress chatter based on the model. The experimental and computational results indicate that the presented methods for chatter stability analysis are reasonable, and the antivibration clearance angle designed is effective in suppressing chatter and improving machining quality.