共查询到19条相似文献,搜索用时 125 毫秒
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为了提高加工精度,对小直径立铣刀的应力场进行了有限元分析。通过铣削力试验,对不同切削参数下立铣刀的铣削力进行动态采集,利用UG建模模块进行立铣刀实体建模,根据铣削力试验结果给出边界条件,在立铣刀有限元模型上加载载荷,利用UG有限元分析模块获得了立铣刀切削过程中切入、切出的瞬时应力场云图,显示了切削中立铣刀应力场的变化规律。 相似文献
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在航空发动机叶轮加工过程中,径向铣削力带来的切削振动对加工质量有较大的影响。为了降低切削振动,基于某叶轮的实际加工工况,利用有限元仿真和MATLAB软件计算进行了铣削力建模和分析,以减小切削振动幅值、降低铣刀弯曲变形程度为优化条件进行了铣刀结构的优化设计。 相似文献
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研究球头立铣刀几何参数优化问题。由于球头立铣刀的几何角度对其切削性能有着重要的影响,因此选择合适的几何参数十分重要。为改善铣刀优化设计提出了以前角、螺旋角和一次后角为试验因素的多元非线性铣削力预报模型的建模方法。通过有限元仿真分析,获得了正交试验数据样本,利用回归技术对其进行分析,确定了铣削力预报模型,采用遗传算法对铣刀几何角度进行优化,通过MATLAB软件仿真最终得到了铣削力最小时的最优几何参数值。结果表明:所选几何参数与铣削力确实有非线性回归关系,且优化后的几何参数组合所对应的铣削力比正交组合试验方案所得铣削力最少降低了2.02%,铣削温度最多降低了83℃。 相似文献
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《机械工程与自动化》2016,(5)
应用Pro/E软件对可转位立铣刀进行了三维建模,并将三维模型导入ANSYS有限元软件中对可转位立铣刀在高速旋转情况下进行应力场分析,得到可转位立铣刀各部件在不同转速下的最大等效应力及其变化趋势;指出了可转位立铣刀在高速切削时的薄弱环节,为高速铣削刀具主轴转速的选择提供了依据。 相似文献
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用改进后的铣削力测量装置进行了不同槽型的铣刀片铣削力试验。基于铣削试验结果,通过机床坐标系与刀体坐标系统的转换,确立了铣刀片应力场有限元分析的载荷边晃条件。利用ANSYS软件,进行了自主研发的三维槽型铣刀片和平刀面铣刀片的应力场有限元分析。有限元分析及试验结果均表明,三维槽型铣刀片的应力场及抗破损能力均好于平前刀面铣刀片。 相似文献
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通过Solidworks建立了立铣刀三维模型,采用ABAQUS有限元分析软件对立铣刀加工铝合金2A12的铣削过程进行仿真,分析不同铣削参数下的仿真结果,得出高速钢立铣刀各铣削分力随铣削深度、每转进给量和铣刀转速的变化趋势,并进行铣削试验。经过对比仿真结果,与实验结果较为吻合。进行正交仿真,基于铣削力经验模型,用matlab拟合出高速钢立铣刀铣削铝合金2A12的铣削力经验公式,为铣削参数的优化和刀具磨损研究提供理论依据。 相似文献
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通过分析影响盘形可转位大模数齿轮铣刀切削力的几个因素,确定每齿进给量变化是影响切削力的主要因素。以此为基础,介绍了齿轮铣刀的强度有限元分析的方法。利用有限元方法分析齿轮铣刀的刀体强度,验证了铣刀的设计安全性,为铣刀的优化设计提供了参考。 相似文献
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Zhenjing DUAN Changhe LI Yanbin ZHANG Min YANG Teng GAO Xin LIU Runze LI Zafar SAID Sujan DEBNATH Shubham SHARMA 《Frontiers of Mechanical Engineering》2023,18(1):4
Aerospace aluminum alloy is the most used structural material for rockets, aircraft, spacecraft, and space stations. The deterioration of surface integrity of dry machining and the insufficient heat transfer capacity of minimal quantity lubrication have become the bottleneck of lubrication and heat dissipation of aerospace aluminum alloy. However, the excellent thermal conductivity and tribological properties of nanofluids are expected to fill this gap. The traditional milling force models are mainly based on empirical models and finite element simulations, which are insufficient to guide industrial manufacturing. In this study, the milling force of the integral end milling cutter is deduced by force analysis of the milling cutter element and numerical simulation. The instantaneous milling force model of the integral end milling cutter is established under the condition of dry and nanofluid minimal quantity lubrication (NMQL) based on the dual mechanism of the shear effect on the rake face of the milling cutter and the plow cutting effect on the flank surface. A single factor experiment is designed to introduce NMQL and the milling feed factor into the instantaneous milling force coefficient. The average absolute errors in the prediction of milling forces for the NMQL are 13.3%, 2.3%, and 7.6% in the x-, y-, and z-direction, respectively. Compared with the milling forces obtained by dry milling, those by NMQL decrease by 21.4%, 17.7%, and 18.5% in the x-, y-, and z-direction, respectively. 相似文献
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Anhai Li Jun Zhao Zhiqiang Pei Ningbo Zhu 《The International Journal of Advanced Manufacturing Technology》2014,71(9-12):1889-1900
Designing a high-performance solid carbide end mill is difficult due to the complex relationship between end mill geometry and numerous or conflicting design goals. Earlier approaches of computer-aided solid end mill design are limited to only a few design aspects. This article presents a three-dimensional finite element method of milling process for solid carbide end mill design and optimization. The software was secondarily developed based on UG platform, integrating the parametric design with the development of the two-dimension drawing of solid carbide end mill. The three-dimension finite element simulation for milling Ti-6Al-4V alloy was performed and the geometrical parameters were optimized based on the objective of low cutting force and cutting temperature. As a result, a simulation-based design and optimization of geometrical parameters of tool structure and cutting edge is possible. The optimized results, for the geometrical parameters of tool structure and cutting edge when milling titanium alloy using a 20-mm diameter solid carbide end mill, is a 12-mm diameter of inner circle, four flutes, a 45 ° helix angle, and a 9 ° rake angle of the side cutting edge. 相似文献