共查询到18条相似文献,搜索用时 171 毫秒
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采用网格应变分析技术,研究不同材料性能下轿车行李箱盖内板冲压成形过程中应变分布,指出了变形过程中可能存在的危险区域,以及这些区域内材料的变形方式;对比了两种不同材料性能下的成形结果,分析了材料性能对该零件成形的影响;给出了模具调整建议. 相似文献
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C柱内板是轿车中重要的结构件,冲压变形复杂。首先,对C柱内板零件进行冲压成形分析,确定其成形方案和成形毛坯。在三维计算模型基础上,采用Autoform软件对零件的成形进行数值模拟,得出零件的成形极限图。根据数值模拟结果,分析零件整体成形性能、材料变薄率,预测C柱内板成形过程中的起皱、拉裂等冲压缺陷,结果表明,零件整体成形到位,材料局部位置变薄超过20%,有拉裂危险。其次,基于UG和CAD软件设计了成形模具的上模、压边圈和下模。最后,通过生产实践压制出合格的C柱内板零件,验证了冲压分析的合理性和模具设计的正确性。 相似文献
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汽车发动机罩内板冲压成形分析 总被引:1,自引:0,他引:1
采用网格应变分析技术,研究了发动机罩内板零件冲压加工的应变分布.分析了零件高应变区域材料的变形方式、冲压件壁厚减薄状况,指出了变形的危险区域,分析了材料性能参数对零件成形的影响.给出了现场冲压生产模具调整的建议. 相似文献
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I. S. Song D. J. Yoo J. W. Yoon D. Y. Yang H. Huh J. H. Lee 《Journal of Materials Engineering and Performance》1995,4(5):593-598
The forming of automobile sheet metal parts in a draw die consists of clamping a blank by binders to form a binder wrap and
drawing the blank into the final part. This paper proposes a numerical method to calculate the binder wrap. A blank is composed
of two regions: the contact region with the die face and the noncontact region of the die cavity. In this study, surface boundary
condition is suggested for calculating the configuration of the binder wrap. Surface boundary condition means that the three-dimensional
geometric data of the die face are used as the base for the displacement boundary condition of the finite-element analysis.
To verify the validity of the proposed method, the binder wraps of complicated automobile parts, including a front fender
and a trunk lid, are analyzed. 相似文献
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Z. Buchar 《Journal of Materials Processing Technology》1996,60(1-4):205-208
Production problems of the autobody door inner panel in the press shop is investigated with aid of the circle grid analysis. The aim is to reduce the scrap rate. The strain distribution and the strain history in the severe deformed area is determined. Strains are compared with the limit strains in the form of the forming limit diagrams. Two forming limit diagrams (FLDs) are determined for two sheet metal blank orientations to the rolling direction =90° and =0°, respectively. Mathematical statistics is used for evaluating of experimental data. Statistically significant difference between forming limit curves is appreciated and the formability stock in the range of various strain states through FLD is determined. Also strain history in the investigated area of the stamped part is determined. 相似文献
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智能与控制在塑性加工制备与成形中的应用 总被引:2,自引:0,他引:2
对材料制备与塑性加工方面的智能控制特点进行了介绍与分析。首先对钢铁、铜及铜合金管材连铸连轧过程控制加工特点进行了阐述 ,其次介绍了镁合金的“轧制 等通道角挤压 拉制”连续加工制备技术和镁合金薄板半固态双辊铸轧工艺。对于薄板增量加工成形技术 ,介绍了飞机整体壁板增量压弯技术、薄板单点无模增量成形技术和多点无模增量成形技术。讨论了薄板可动凹模液压成形技术、异型截面管件液压成形技术和细长杆件空间弯扭成形技术原理。最后对于微小件加工技术进行了简要介绍 相似文献
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