王 佺, 于培师, 吕锦杰, 赵军华.新型Cr12Mo1V1剪切刀具的破坏分析与结构优化[J].轻工机械,2017,35(4):79-82 |
新型Cr12Mo1V1剪切刀具的破坏分析与结构优化 |
Destroy Analysis and Structural Optimization of Novel Cr12Mo1V1 Shear Cutter |
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DOI:10.3969/j.issn.1005 2895.2017.04.017 |
中文关键词: 金属切削 剪切刀具 三维有限元法 应力场 应力强度因子 |
英文关键词:metal cutting shear cutter three dimensional finite element method stress field stress intensity factor |
基金项目:国家自然科学基金项目(11302067)。 |
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中文摘要: |
针对目前新型Cr12Mo1V1剪切刀具在使用中频繁发生破坏行为,采用三维有限元方法系统研究了该刀具在切割工况下的力学行为。先得到了该刀具的详细应力场,确定其危险部位,并基于经典强度理论对其破坏进行了分析与校核;详细研究了刀具在出现不同几何尺寸的三维角裂纹时,其裂纹前缘应力强度因子的分布结果。基于这些结果对该刀具的几何结构与尺寸进行了优化,降低了应力水平,提高了抗断裂强度。 |
英文摘要: |
A three dimensional finite element method was used to study the mechanical behavior of a new type of cutter Cr12Mo1V1 which is unexpected to destroy in the process of cutting. For the first step, the detailed stress field of the cutter was obtained, the dangerous position was determined, and the failure of the cutter was analyzed and reexamined based on the classical strength theories. In addition, the distribution of the stress intensity factor of corner cracks of different sizes was obtained in detail. Based on these results, the geometries and sizes of the cutter were optimized, which reduced the stress level and improved the fracture strength. |
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