| 高速切削过程中绝热剪切临界条件的研究 |
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| 引用本文： | 刘超,艾兴,刘战强,万熠. 高速切削过程中绝热剪切临界条件的研究[J]. 工具技术, 2009, 43(11): 8-10 |
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| 作者姓名： | 刘超 艾兴 刘战强 万熠 |
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| 作者单位： | 山东大学高效洁净机械制造教育部重点实验室;山东大学 |
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| 基金项目： | 国家重点基础研究发展计划(973)资助项目 |
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| 摘 要： | 对高速切削过程中绝热剪切带的特征进行了分析,获得了绝热剪切临界切削条件:绝热剪切发生的临界条件由剪应变、剪应变率和变形温度三者组成。在临界状态下,当变形温度一定时,临界剪应变与临界剪应变率成反比。变形温度越高,绝热剪切所需临界剪应变或临界剪应变率越大。当切削速度提高到一定程度时,锯齿形基体屑片间连续面积随着剪切带开裂而减小,直至完全分裂分离。
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| 关 键 词： | 高速切削 绝热剪切带 临界条件 锯齿形切屑 |
Study on Adiabatic Shearing Critical Condition in High-speed Cutting |
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| Liu Chao,Ai Xing,Liu Zhanqiang,Wan Yi. Study on Adiabatic Shearing Critical Condition in High-speed Cutting[J]. Tool Engineering(The Magazine for Cutting & Measuring Engineering), 2009, 43(11): 8-10 |
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| Authors: | Liu Chao Ai Xing Liu Zhanqiang Wan Yi |
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| Affiliation: | Liu Chao,Ai Xing,Liu Zhanqiang,Wan Yi Doctoral Student,School of Mechanical Engineering,Shandong University,Key Laboratory of High Efficiency and Clean Mechanical Manufacture,Ministry of Education,Jinan 250061,China |
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| Abstract: | The characteristics of adiabatic shearing band in high-speed cutting were analyzed. The critical cutting condition of adiabatic shearing was gained which contains three parts: shear strain, shear strain rate and distortion temperature. Under the critical condition, when distortion temperature was given, critical shear strain was inversely proportional to critical shear strain rate. When distortion temperature getting higher, the critical strain or strain rate must be bigger to take place adiabatic shearing.... |
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| Keywords: | high-speed cutting adiabatic shear band critical condition sawtoothed chip |
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