钟斌,王攀,于正洋,等.新型低应力下料工艺实验研究与数值模拟[J].精密成形工程,2022,14(7):58-63.
ZHONG Bin,WANG Pan,YU Zheng-yang,et al.Experimental Research and Numerical Simulation of New Low-stress Cropping Process[J].Journal of Netshape Forming Engineering,2022,14(7):58-63. |
| 新型低应力下料工艺实验研究与数值模拟 |
| Experimental Research and Numerical Simulation of New Low-stress Cropping Process |
| |
| DOI：10.3969/j.issn.1674-6457.2022.07.008 |
| 中文关键词: 低应力下料 数值模拟 缺口 应力集中 |
| 英文关键词: low stress cropping numerical simulation notch stress concentration |
| 基金项目:国家自然科学基金(51705416) |
|
| 摘要点击次数: 1568 |
| 全文下载次数: 889 |
| 中文摘要: |
| 目的 针对金属棒料精密下料过程中坯料断面质量差的问题，提出一种新型低应力下料致裂方法。方法 利用有限元数值模拟构建低应力致裂可控旋弯下料三维有限元模型，模拟下料过程，分析缺口张角参数对下料效率的影响，并根据数值模拟结果进行相应的下料试验。结果 当缺口张角为对称45o时，缺口根部应力集中效应最为显著，坯料断面质量较好，同时下料效率较高。结论 使用新型低应力下料致裂方法能够在提高下料效率的同时保证较好的坯料断面质量，且数值模拟结果与实验结果有较高的一致性。 |
| 英文摘要: |
| The work aims to propose a new low-stress cropping cracking method, so as to solve the problem of poor cross-section quality of blank in precise cropping of metal bars. Finite element numerical simulation was used to build a three-dimensional finite element model of low-stress cracking controllable rotary bending cropping, the cropping process was simulated, the effect of different notch opening angle on cropping efficiency was analyzed and the corresponding cropping test was carried out according to the numerical simulation results. When the notch angle was symmetrically 45o, the stress concentration effect at the root of the notch was the most significant, the cross-section quality of blank was better, and the cropping efficiency was high. The new low-stress cropping cracking method can improve the cropping efficiency and ensure the cross-section quality of blank. The numerical simulation results are in good agreement with the experimental results. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
渝公网安备 50010702501719号