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Influence mechanism of machining angles on force induced error and their selection in five axis bullnose end milling 被引量:4
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作者 Zerun ZHU Fangyu PENG +4 位作者 Rong YAN Zepeng LI Jiawei WU Xiaowei TANG Chen CHEN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2020年第12期3447-3459,共13页
In the machining of complicated surfaces,the cutters with large length/diameter ratios are used widely and the deformation of the machining system is one of the principal error sources.During the process planning stag... In the machining of complicated surfaces,the cutters with large length/diameter ratios are used widely and the deformation of the machining system is one of the principal error sources.During the process planning stage,the cutting direction angle,the cutter lead and tilt angles are usually optimized to minimize the force induced error.It may lead to a low machining efficiency for bullnose end mills,as the material removal rates are different largely for different machining angles.In this paper,the influence mechanism of the machining angles on the force induced error is studied based on the models of the instantaneous cutting force when the cutter flute traveling through the cutting contact point and the stiffness of the machining system.In order to evaluate the machining angles,the force induced error/efficiency indicator(FEI)is defined as the division of the force induced error and the equal volume sphere of the removed material.FEI is dimensionless,with the lower FEI,the lower force induced error and the higher machining efficiency.For optimal selection of the machining angles,the critical FEI is calculated with the constraint of force induced error and the desired material removal rate,and the critical FEI separate the set of the machining angles into two subsets.After the feed rate scheduling process,the machining angles in the optimal subset would have higher machining accuracy and efficiency,while the machining angles in the other subset have lower machining accuracy and efficiency.Through the machining experiment of five axis machining and freeform surface machining,the effectiveness and superiority of the proposed FEI method is verified with a bullnose end mill,which can improve the machining efficiency with the constraint of force induced error. 展开更多
关键词 Force induced error five axis machining Machining efficiency Machining angles Milling Optimization
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基于管管相贯的五轴插补算法的研究 被引量:2
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作者 黄丰磊 欧长劲 +2 位作者 丁建波 柯尊高 张忠海 《轻工机械》 CAS 2011年第3期43-47,共5页
针对目前等离子数控切割机进行管管相贯坡口切割过程中,管端相贯数学模型有局限性、插补算法尚不完善等问题,文章通过对各类管管相贯进行分析,提出统一的坡口相贯线数学模型,在该模型的基础上,提出变步长相贯线的五轴插补算法,最后在切... 针对目前等离子数控切割机进行管管相贯坡口切割过程中,管端相贯数学模型有局限性、插补算法尚不完善等问题,文章通过对各类管管相贯进行分析,提出统一的坡口相贯线数学模型,在该模型的基础上,提出变步长相贯线的五轴插补算法,最后在切割运动方案的基础上,完成机床逆解的理论计算。仿真结果显示,该算法在保证切割效率的前提下,实现了加减速控制,保证加工稳定性,提高切割加工精度。 展开更多
关键词 金属加工 相贯线 五轴联动 插补算法 变步长
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五轴联动数控激光加工系统的空间曲线B样条插补算法研究 被引量:7
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作者 陈伟 殷苏民 《机床与液压》 北大核心 2004年第1期53-55,共3页
五轴联动计算机数控激光加工系统是多功能综合性的机电一体化设备 ,可进行平面和三维曲面的切割、焊接等激光加工。传统的CNC系统往往只提供直线和圆弧插补功能 ,不能满足CAD系统的曲线和曲面造型能力对CAM系统的要求。本论文针对复杂... 五轴联动计算机数控激光加工系统是多功能综合性的机电一体化设备 ,可进行平面和三维曲面的切割、焊接等激光加工。传统的CNC系统往往只提供直线和圆弧插补功能 ,不能满足CAD系统的曲线和曲面造型能力对CAM系统的要求。本论文针对复杂轮廓零件数控加工的需要 ,提出了一种新的空间曲线B样条插补五轴联动算法 。 展开更多
关键词 五轴联动 计算机数控 空间曲线 B样条插补
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