共查询到19条相似文献,搜索用时 62 毫秒
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采用锥面磨削法刃磨钻削刀具的后刀面,可显著提高刀具的使用寿命,有利于保证工件加工精度和提高工件表面质量。利用数控加工设备进行锥面磨削或者进行锥面磨削设备的研制中,关键是数学模型(后刀面方程)的建立;据此编制和计算机床坐标值的程序、对刀具刃磨机床进行研制。针对锥面磨削方法中钻削刀具后刀面方程的建立和有关参量的计算作深入的研究。并以该后刀面方程完成刀具刃磨机床的初期开发研制。 相似文献
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针对TC4钛合金钻孔加工过程中的钻削轴向力和扭矩进行了试验研究,通过多次试验进行数据评估和统计学分析,得出加工过程中钻削力和扭矩数据及其不同条件下的变化规律.分析了钻头直径、主轴转速和进给速度对钻削力的影响规律,然后运用SPSS多元线性回归分析得出钻削力数学模型,并对其准确性和可靠性进行了评价.本研究结果对TC4钛合金及其他均质金属材料钻孔加工的钻削力分析具有较高的参考价值. 相似文献
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钻削力模型的建立及仿真 总被引:1,自引:0,他引:1
在研究直线刃标准麻花钻的基础上,建立了有关切削几何参数的数学模型。并对标准麻花钻的几何参数进行了定量的分析。由于钻削过程的复杂性,采用了数学分析和经验值相结合的方法来研究钻削过程机理,建立了动态钻削力和扭矩模型,实现了对动态钻削力和扭矩的仿真。 相似文献
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本文分析了特深小孔及其钻削特点,对研制特深小孔钻床和钻头提出了一系列技术要求,并介绍了使用时的钻削参数,同时指出了钻削加工中应注意的几个技术问题。 相似文献
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采用不同刃口处理形式的硬质合金钻头对40Cr材料进行单因素钻削对比试验,研究了钻削速度及进给量对切削力的影响。结果表明:对于无涂层钻头,随着进给量提高,抛光钻头的切削力要小于未抛光钻头;对于涂层钻头,随着进给量提高,抛光钻头的切削力要大于未抛光钻头。随着切削速度的增加,无涂层钻头的钻削力先增大后减小;涂层钻头的钻削力则一直增大。 相似文献
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XU Linlin WANG Chengyong JIANG Min HE Huiyu SONG Yuexian CHEN Hanyuan SHEN Jingnan ZHANG Jiayong 《机械工程学报(英文版)》2014,(6):1240-1248
Many researches on drilling force and temperature have been done with the aim to reduce the labour intensiveness of surgery, avoid unnecessary damage and improve drilling quality. However, there has not been a systematic study of mid- and high-speed drilling under dry and physiological conditions(injection of saline). Furthermore, there is no consensus on optimal drilling parameters. To study these parameters under dry and physiological drilling conditions, pig humerus bones are drilled with medical twist drills operated using a wide range of drilling speeds and feed rates. Drilling force and temperature are measured using a YDZ-II01W dynamometer and a NEC TVS-500EX thermal infrared imager, respectively, to evaluate internal bone damage. To evaluate drilling quality, bone debris and hole morphology are observed by SEM(scanning electron microscopy). Changes in drilling force and temperature give similar results during drilling such that the value of each parameter peaks just before the drill penetrates through the osteon of the compact bone into the trabeculae of the spongy bone. Drilling temperatures under physiological conditions are much lower than those observed under dry conditions, while a larger drilling force occurs under physiological conditions than dry conditions. Drilling speed and feed rate have a significant influence on drilling force, temperature, bone debris and hole morphology. The investigation of the effect of drilling force and temperature on internal bone damage reveals that a drilling speed of 4500 r/min and a feed rate of 50 mm/min are recommended for bone drilling under physiological conditions. Drilling quality peaks under these optimal parameter conditions. This paper proposes the optimal drilling parameters under mid- and high-speed surgical drilling, considering internal bone damage and drilling quality, which can be looked as a reference for surgeons performing orthopedic operations. 相似文献
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