2012年 第7卷 第3期
《机械工程前沿（英文）》 >> 2012年 第7卷 第3期 doi: 10.1007/s11465-012-0303-x
Research on the dynamic mechanical characteristics and turning tool life under the conditions of excessively heavy-duty turning
The Key Laboratory of Advanced Manufacturing Technology & Cutting Tools, Harbin University of Science and Technology, Harbin 150080, China
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摘要
The dynamic mechanical characteristics of excessively heavy-duty cutting were analyzed based on the cutting experiments with 2.25Cr-1Mo-0.25V steel used in hydrogenated cylindrical shells. By investigating the influence of dynamic mechanical characteristics on the tools’ failure in limited heavy-duty cutting processes, the model of dynamic shearing force in the cutting area was established. However, the experimental results showed that the dynamic shear flow stress in the cutting area greatly influenced the tools’ fatigue. The heavy-duty cutting tool was damaged in the form of a shearing fracture. Through a comprehensive analysis of the theory, the critical condition of the tools’ fracture under extreme loading was established.
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