| 引用本文: | 丁日显,郭成,张缓缓,陈维.基于田口方法齿圈压板精冲模具参数优化[J].材料科学与工艺,2013,21(1):92-96.DOI:10.11951/j.issn.1005-0299.20130116. |
| DING Ri-xian,GUO Cheng,ZHANG Huan-huan,CHEN Wei.Optimization of parameters of fine-blanking die based on the Taguchi method[J].Materials Science and Technology,2013,21(1):92-96.DOI:10.11951/j.issn.1005-0299.20130116. |
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| 摘要: |
| 在精密冲裁过程中,精冲模具结构参数和板料的摩擦系数显著影响精冲剪切面质量.采用有限元模拟和田口方法,对齿圈压板精冲模具精冲H62黄铜板料过程中凹模圆角半径、V形齿齿高、V形齿齿边距和板料摩擦系数对剪切面撕裂比的影响进行了研究.结果表明:参数按照减小撕裂比能力由大到小排序依次是凹模圆角半径,V形齿齿高,板料-模具摩擦系数和V形齿齿边距.研究发现: 采用优化参数可显著减小剪切面上撕裂比,撕裂比最大减小24.8%,并可抑制凹模刃口附近微裂纹萌生,使剪切带内裂纹由凸模单向扩展至凹模刃口,避免裂纹的双向扩展-贯通导致较大撕裂比剪切面的出现. |
| 关键词: 精密冲裁 田口方法 有限元模拟 撕裂比 H62黄铜 裂纹扩展 |
| DOI：10.11951/j.issn.1005-0299.20130116 |
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| Optimization of parameters of fine-blanking die based on the Taguchi method |
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DING Ri-xian 1,GUO Cheng 1,ZHANG Huan-huan 1,CHEN Wei2
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(1.School of Mechanical Engineering,Xi′an Jiaotong University,Xi′an 710049,China; ;2.CNGC Northwest Industries Group Co.,LTD,Xi′an 710043,China)
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| Abstract: |
| In fine-blanking process,structural parameters of fine-blanking die and friction coefficient of the sheet significantly influence the edge quality of the fine-blanked part.FEM simulation with Taguchi method was carried out to investigate the influence of the fine-blanking parameters (i.e.,die radius,V indenter height and position,coefficient of friction of the sheet) on the crack ratio of the fine-blanked surface in the process of fine-blanking H62brass plate.The results indicate that the descending order of importance of the parameters is the die radius,the V-ring indenter height,the coefficient of friction and the V-ring indenter position.The maximum reduction of crack ratio was about 24.8% using the fine-blanking die with the optimization parameters,which could suppress the nucleation of micro-crack near the die radius and made the crack propagated from the punch side to the die side.Crack coalescence was avoided in the shearing zone in the punching process because of the reduction of the crack ratio on the fine-blanking surface. |
| Key words: fine-blanking process Taguchi method FEM simulation crack ratio H62brass crack propagation |
