Stability recognition for high-speed milling of TC4 thin-walled parts with curved surface
Stability recognition for high-speed milling of TC4 thin-walled parts with curved surface
复制标题
TC4薄壁曲面零件高速铣削稳定性识别
DOI：
10.1007/s00170-016-9905-5
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发表时间：
2017
影响因子：
3.4
通讯作者：
Si Li-kun
中科院分区：
文献类型：
--
作者：
Ma Jian-wei;Liu Zhen;Jia Zhen-yuan;Song De-ning;Gao Yuan-yuan;Si Li-kun
TC4曲面薄壁零件在工业应用中得到广泛应用，表面质量是保证功能性能的基本要求。由于薄壁零件的刚性较低，因此经常遇到切削振动问题，导致表面质量较差。同时，工件的刚度随着切削过程不断变化，对薄壁零件比较敏感，引起更为复杂的切削振动。随着具有铣削力小优点的高速铣削的广泛使用，薄壁零件由于高频激励，切削振动变得更加严重。为了避免TC4薄壁曲面零件高速铣削时出现严重的切削振动，提高加工质量，需要确定直接影响切削振动的合适切削参数。以TC4圆弧薄壁零件高速侧面铣削为例，计算出考虑薄壁零件刚度变化的稳定域。同时，根据考虑工件刚度随加工过程变化而建立的稳定域，得到极限稳定轴向切削深度。结果表明，极限稳定轴向切削深度为9.69 mm，当选择略小于极限值的轴向切削深度时，可以同时保证稳定的切削过程和高效加工。本研究提出了一种识别曲面薄壁零件高速铣削稳定轴向切削深度范围的有效方法。此外，它还为优质、高效的加工过程提供了指导。
TC4 thin-walled parts with curved surface are widely used in industrial applications, and the surface quality is a basic requirement to ensure the functional performance. Because of the low rigidity of thin-walled parts, the cutting vibration problem is commonly encountered which results in a bad surface quality. Meanwhile, the rigidity of the workpiece is continuously changing along with the cutting process which is sensitive to the thin-walled parts and induces a more complex cutting vibration. With the extensive usage of high-speed milling which has the advantage of small milling force, the cutting vibration becomes more severe due to the high frequency excitation for the thin-walled parts. To avoid the serious cutting vibration as well as improve the machining quality for high-speed milling of TC4 thin-walled parts with curved surface, the appropriate cutting parameters which influence cutting vibration directly are needed to be determined. Taking high-speed flank milling of TC4 arc-shaped thin-walled parts as an example, the stable domain is worked out on considering the rigidity variation of thin-walled parts. Meanwhile, the limit stable axial cutting depth is obtained based on the stability domain which is established by considering the rigidity variation of workpiece along with the machining process. The results show that the limit stable axial cutting depth is 9.69 mm, and the stable cutting process as well as the high-efficiency machining can be guaranteed simultaneously when selecting the axial cutting depth that is slightly smaller than the limit value. This research puts forward an effective approach for recognizing the stable axial cutting depth range for high-speed milling of thin-walled parts with curved surface. In addition, it provides guidance for superior-quality and high-efficiency machining process.