共查询到20条相似文献，搜索用时 109 毫秒
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《锻压技术》2021,46(8):90-96
针对复杂边界特征的钣金件级进冲压成形中经常会出现零件产品内外边界超差的现象,以一副复杂边界车身内板左、右件为研究对象,首先,设计了毛坯的10工位排样图,并以毛坯排样图为基础,逐步建立了制件的单工位全工序有限元模型,对板料的冲压成形性进行了仿真分析,确定了合理的冲压成形工艺参数与方案;其次,采用CAD/CAE技术,设计了毛坯的初次激光料带模型,并通过试模、检测和激光料带再设计对激光料带的目标形状进行逐次寻优。结果显示:经过两次试模后,快速获得了合格的实冲零件产品,表明激光料带试模法能够指导复杂边界车身钣金件级进模冲裁工位的快速设计,从而提高复杂边界钣金件级进模的设计效率。 相似文献
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工步排样是级进模设计的核心,智能化工步排样是冲模设计专家系统的主要研究内容。本文研究并提出了知识驱动的冲压件特征建模的基本思想,分析了智能化工步排样设计基本方法和特点,提出了基于知识的工步排样设计策略。 相似文献
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司马中文 《锻压装备与制造技术》2002,37(5):26-28
针对级进模工序排样的设计原则,利用冲切凹模的干涉关系矩阵和精度关系矩阵建立了排样用的干涉精度关系矩阵。并根据排样时精度关系的不同要求,利用模糊聚类方式进行归类。此排样模型可用于一般级进模的工序排样设计。 相似文献
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介绍了录音推板零件多工位级进模的设计 ,分析了零件的冲压工艺 ,对排样设计方案作了比较与选择 ,确定了条料的送进与导料方式及定距结构形式 ,并对模具的主要部件设计作了详细地说明。 相似文献
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通过对铆接接线脚零件结构特点和成形工艺分析,对该冲件级进模排样的各个方案进行比对、选择和确定.同时介绍了模具主要工作零件及模具的总装结构设计. 相似文献
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Jae C Choi Byung M Kim Hae Y Cho Chul Kim 《International Journal of Machine Tools and Manufacture》1998,38(8):931-963
This paper describes the development of a computer-aided design of blanking and piercing for irregular-shaped sheet metal products and stator and rotor parts. An approach to the compact and practical CAD system is based on the knowledge-based rules. Knowledge for the CAD system is formulated from plasticity theories, experimental results and the empirical knowledge of field experts. The system has been written in AutoLISP on the AutoCAD with a personal computer and is composed of six main modules, which are input and shape treatment, production feasibility check, blank layout, strip layout, die layout, and drawing edit module. Based on knowledge-based rules, the system, STRTDES, is designed by considering several factors, such as complexities of blank geometry and punch profile, availability of press equipment and standard parts, utilization ratio which minimizes the scrap in a single or a pairwise operation, bridge width, grain orientation and design requirements which maximize the strength of the part when subsequent bending is involved. Therefore, this system can carry out a die design for each process which is obtained from the results of an automated blank layout drawing with the best utilization ratio for the irregular shape of the product, which was successful in the production feasibility check module, and those of an automated strip layout drawing. It can then generate part drawings and the assembly drawing of the die set in graphic form. The developed system provides its efficiency and effectiveness for blank layout, strip layout, and die layout of irregular-shaped sheet metal products and stator and rotor parts. 相似文献
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介绍了滚针轴承冲压外圈连续拉伸级进模的设计过程,包含拉伸工艺计算、步距精度和定位方式的确定、凸凹模结构设计以及级进模结构及有关机构的设计,其中拉伸工艺计算用于确定工序排样;步距精度的计算用于确定是否应用导正销;工序排样确定后进而设计凸、凹模结构尺寸;以及设计级进模的其它结构,包括模架、导向装置、卸料装置、弹性元件、导料与托料装置、顶出装置、限位装置、微调装置、安全检测保护装置等;最后确定了级进模的整体结构。 相似文献
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