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| 薄壁水槽充液拉深变形规律研究 |
| Deformation Regularity of Sink Shaped Thin-walled Part in Hydroforming |
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| DOI：10.3969/j.issn.1674-6457.2023.02.023 |
| 中文关键词: 数值模拟 充液拉深 薄壁结构 工艺优化 液压加载路径 |
| 英文关键词: numerical simulation hydroforming drawing thin-walled structure process optimization hydraulic loading route |
| 基金项目:佛山市产学研项目(1920001001369) |
| Author Name | Affiliation | | HONG Yi-hao | School of Material and Energy, Guangdong University of Technology, Guangzhou 510000, China | | MO Bing-jun | School of Material and Energy, Guangdong University of Technology, Guangzhou 510000, China | | WU Fei | School of Material and Energy, Guangdong University of Technology, Guangzhou 510000, China | | CHEN Jia-zhi | Guangdong Yingao Kitchen Utensils Co., Ltd., Guangdong Foshan 528000, China | | LIANG Qing-jun | Guangdong Yingao Kitchen Utensils Co., Ltd., Guangdong Foshan 528000, China |
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| 中文摘要: |
| 目的 解决薄壁水槽盒形件刚性拉深一序底部圆角减薄过大、整体厚度减薄严重以致后续拉深二序、三序成形后产品厚度不合格的问题，同时解决工艺路线的退火问题。方法 利用有限元分析软件Dynaform对薄壁水槽充液拉深一序进行数值模拟分析，研究关键工艺参数对成形结果的影响规律，并得出最优的工艺参数，最后与刚性拉深的模拟结果对比分析，提出充液拉深方法的可行性。结果 根据工艺优化方案，得出最优工艺参数:预胀压力2 MPa，最大液室压力20 MPa;液室压力加载路径:从0 s至0.003 s，液室压力从0 MPa线性增大至2 MPa，并保持2 MPa至0.007 s;随后从0.007 s至0.011 s，液室压力从2 MPa线性增大至20 MPa，之后保持20 MPa直至拉深结束;压边间隙为1.05t。结论 通过充液成形方法，可以有效解决薄壁水槽盒形件拉深一序底部圆角减薄严重的问题，还可以提高成形质量及成形极限，省略中间退火工艺，提高经济效益。 |
| 英文摘要: |
| The work aims to solve the problem that the bottom fillet and the overall thickness of thin-walled sink-shaped box part in the first rigid drawing are too thin, which leads to the unqualified thickness of the products after the subsequent second and third drawing, as well as the annealing problem of the process route. The finite element analysis software Dynaform was used to carry out numerical simulation analysis on the first sequence of hydroforming for the thin-walled sink. The influence law of key process parameters on forming results was studied and the optimal process parameters were obtained. Finally, the feasibility of the hydroforming method is proposed by comparing with the simulation results of rigid drawing. According to the process optimization scheme, the optimal process parameters were obtained as follows:the preswelling pressure was 2 MPa, the maximum liquid chamber pressure was 20 MPa; pressure loading route of liquid chamber:from 0 s to 0.003 s, the liquid chamber pressure linearly increased from 0 MPa to 2 MPa, and kept at 2 MPa until 0.007 s; then from 0.007 s to 0.011 s, the liquid chamber pressure linearly increased from 2 MPa to 20 MPa, and then kept at 20 MPa until the end of drawing; the blank holder gap was 1.05t. Apparently, the serious problem of the bottom fillet thinning in the first drawing process of box parts of the thin-walled sink can be effectively solved by the hydroforming method. In addition, hydroforming can improve the forming quality and forming limit, omit the intermediate annealing process, and improve the economic benefit. |
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