Analysis of PCBN tool failure mechanisms in face milling of hardened steel using damage equivalent stress

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• 作者：Xiaobin Cui ; Jingxia Guo ; Jun Zhao&#8230
• 关键词：PCBN tool ; Failure mechanisms ; Face milling ; Hardened steel ; Damage equivalent stress
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：80
• 期：9-12
• 页码：1985-1994
• 全文大小：2,241 KB
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• 作者单位：Xiaobin Cui (1)
  Jingxia Guo (2)
  Jun Zhao (3)
  Yanyan Yan (1)
  
  1. School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, 454003, People鈥檚 Republic of China
  2. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, People鈥檚 Republic of China
  3. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan, 250061, People鈥檚 Republic of China
  
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Production and Logistics
  Mechanical Engineering
  Computer-Aided Engineering and Design
  
• 出版者：Springer London
• ISSN：1433-3015

文摘

An attempt was made in the present study to apply damage mechanics to investigate the polycrystalline cubic boron nitride (PCBN) tool failure mechanisms in face milling of hardened steel. Experimental phenomenon relating to damage accumulation was found by means of analyzing the tool wear evolution and macroscale failure of the cutting tool. Damage equivalent stress was used as an indicator to reveal the tool failure mechanisms under different cutting conditions. Because of the larger value of damage equivalent stress, there was greater likelihood of tool fracture in down milling than that in up milling. Deflection of the shear angle changed the tool stress component and distribution substantially in up milling, leading to the emergence of the peak value of damage equivalent stress in spite of lower values of cutting force and tool temperature. Calculated damage equivalent stress and tool lives obtained in milling tests were compared and analyzed. It was found that damage equivalent stress can be used as an effective tool to analyze the tool failure mechanisms and assess the optimum cutting condition. Keywords PCBN tool Failure mechanisms Face milling Hardened steel Damage equivalent stress