| 正交切削淬硬45钢绝热剪切临界条件实验研究 |
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| 引用本文： | 李国和,王敏杰,段春争.正交切削淬硬45钢绝热剪切临界条件实验研究[J].大连理工大学学报,2011,51(4):518-524. |
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| 作者姓名： | 李国和 王敏杰 段春争 |
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| 作者单位： | 1. 大连理工大学精密与特种加工教育部重点实验室,辽宁大连116024 天津职业技术师范大学天津市高速切削与精密加工重点实验室,天津300222
2. 大连理工大学精密与特种加工教育部重点实验室,辽宁大连,116024 |
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| 基金项目： | 国家自然科学基金资助项目(50775018) |
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| 摘 要： | 进行了3种硬度淬硬45钢的正交切削实验,通过金相观测研究了切削条件对第一变形区绝热剪切的影响,得到了淬硬45钢在正交切削过程中的绝热剪切临界切削条件,并分析了平均切削力和切屑变形.结果表明：淬硬45钢的绝热剪切临界切削速度随着切削厚度的减小或刀具前角的增大而增大.材料硬度越高,临界切削速度越小.在绝热剪切发生时,平均切削力不发生突变.在绝热剪切发生之前,带状切屑的变形系数随着切削速度的增大而减小,并逐渐趋近于1.
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| 关 键 词： | 正交切削 绝热剪切 临界条件 平均切削力 变形系数 |
Experimental study of adiabatic shear critical conditions in orthogonal cutting of hardened 45 steel |
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| LI Guohe,WANG Minjie,DUAN Chunzheng.Experimental study of adiabatic shear critical conditions in orthogonal cutting of hardened 45 steel[J].Journal of Dalian University of Technology,2011,51(4):518-524. |
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| Authors: | LI Guohe WANG Minjie DUAN Chunzheng |
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| Institution: | LI Guo-he1,2,WANG Min-jie1,DUAN Chun-zheng1(1.Key Laboratory for Precision & Non-traditional Machining of Ministry of Education,Dalian University of Technology,Dalian 116024,China,2.Tianjin Key Laboratory of High Speed Cutting & Precision Machining,Tianjin University of Technology and Education,Tianjin 300222,China) |
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| Abstract: | The orthogonal cutting experiments of three kinds of hardness hardened 45 steel are performed.The influences of cutting conditions on adiabatic shear in the first deformation zone are studied through metallurgical observation,and the adiabatic shear critical cutting conditions in orthogonal cutting process of hardened 45 steel are obtained.The change of average cutting force and the chip deformation are also analyzed.Results show that the adiabatic shear critical cutting speed increases with the decrease of... |
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| Keywords: | orthogonal cutting adiabatic shear critical condition average cutting force deformation coefficient |
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