Modeling and Influence Factors of Cutting Force in Micro-Milling Inconel718
首发时间:2013-06-03
Abstract:The Micro-milling technology based on Micro-machine is widely used in the precision manufacturing industry and is the most suitable for producing complex and micro 3D geometries and shapes. Nickel-based superalloys Inconel718 can well meet the demand for complex and micro 3D geometries and shapes, and can endure high temperature, high load and corrosive conditions of parts due to its superior properties. However, Inconel718 is a well-known difficult-to-cut material. At present, researches on the Micro-milling of nickel-base superalloys material have never been publicly reported, and the Micro-milling mechanism of this kind of material is not clear, whereas the study on cutting force is of critical significance to reveal machining mechanism. This paper applies ultrafine particle coated cemented carbide tools to conduct micro groove milling orthogonal experiment on typical difficult-to-cut material Inconel718, and studies the influence principle of cutting parameters (which include Extended length of micro-milling cutter, spindle speed, axial depth of cut and feed per tooth) on cutting force; and based on the above, the micro milling force prediction models are built according to experiment results, in addition the significance test and fitting degree test are conducted on the prediction models; The test results show that the three-dimensional cutting forces model can be used to predict and control during micro-milling Nickel-based superalloys Inconel718.
keywords: Micro-milling cutting force model cutting parameters Inconel718
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Inconel718微细铣削力建模及影响因素研究
摘要:基于微小型机床的微细铣削(Micro-milling)技术被广泛应用于超精密加工行业,最适合于加工复杂微小三维形貌特征。镍基高温合金Inconel718由于其特殊属性可以很好的满足目前对具有复杂微小三维形貌特征,能够承受高温、高强度和耐腐蚀环境的零部件的需求,但其属于典型的难加工材料。目前,针对镍基高温合金材料的微铣削研究尚未见公开报道,镍基高温合金微铣削机理尚不明确,而切削力研究对于加工机理的揭示至关重要。本文采用超微粒子超硬合金涂层刀具对典型难加工材料Inconel718进行微细槽铣削正交实验,研究切削参数(包括刀具悬伸量、主轴转速、背吃刀量、每齿进给量)对切削力的影响规律;在此基础上,依据实验结果建立微细铣削力预测模型,并对切削力预测模型进行了显著性检验和拟合度检验。
关键词: 微细铣削 铣削力模型 切削参数 Inconel718
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