共查询到20条相似文献，搜索用时 390 毫秒
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通过预拉伸模拟出阀门用镀锡板冲压后板面黑线缺陷,结合扫描电镜以及能谱分析、三维轮廓仪详细分析了黑线产生原因,结果表明:(1)冲压前镀锡板的表面状态对冲压后表面有着直接影响,冲压后板面轧制纹路会放大,粗大突出的纹路会造成宏观上视觉黑线。(2)黑线缺陷处为板面高点,根据复印关系,板面高点对应轧辊低点,轧辊表面质量直接影响镀锡板板面形貌。(3)通过优化轧辊表面来提升板面形貌,从而解决冲压黑线问题。 相似文献
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目前,板料冲压成形仿真技术已能对板料在复杂成形过程中可能出现的起皱、破裂现象及成形后的回弹情况进行仿真,成为解决复杂板料成形模具设计及成形工艺问题的利器．本文介绍了板料冲压成形仿真技术的研究及应用情况． 相似文献
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文章阐述实施基于工作过程的“冲压模具设计与制造”课程教学有效地解决了原有课程体系中理论教学与实训操作、企业生产实际相互脱节的问题,充分调动学生学习的主动性和积极性,激发学生的学习兴趣和创作热情。 相似文献
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介绍了覆盖件冲压成形仿真理论以及冲压工艺,对冲压仿真流程进行了阐述。采用CAE技术ETA\Dynaform对某汽车盒形件进行模拟仿真,分析仿真结果,对其中的影响因素压边力和拉延筋进行了改进和确定。通过使用仿真方法,对板料的冲压成形及时进行观察和了解,针对成形后可能出现的缺陷问题,提出解决方案。在模具结构设计阶段改进局部结构,缩短了模具设计开发周期,提高板料利用率,为汽车覆盖件冲压成形提供技术支撑。 相似文献
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《赤峰学院学报(自然科学版)》2017,(15)
冲压模具的寿命长短可以根据其在失效前制造的零件数量来评价,制约冲压模具服役时间的因素有很多,在实际生产中,几种因素共同作用,决定了冲压模具的使用寿命.对于不同的影响因素需要了解其具体的影响方式才能够找到合理的解决方法来提高产品质量延长模具寿命,本文从设计过程制,造过程以及模具的使用过程三个方面列举了影响冲压模具寿命的几种主要因素以及可以延长模具寿命的一些途径. 相似文献
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For the designing of cutting-dies is a complex and experience-based process, it is poorly supported by conventional 3D CAD software. Thus, the majority of design activities, including the (re)modeling of those cutting die-components that are directly responsible for performing shaping operations on a sheet-metal stamping part, traditionally still need to be carried-out repetitively, separately, and manually by the designer. To eliminate some of these drawbacks and upgrade the capabilities of conventional 3D CAD software, this paper proposes a new methodology for the development of a parametric system capable of automatically performing a (re)modeling process of compound washer dies’ cutting-components. The presented methodology integrates CATIA V5 built-in modules, including Part Design, Assembly Design and Knowledge Advisor, publication mechanism, and compound cutting die-design knowledge. The system developed by this methodology represents an ‘intelligent’ assembly template composed of two modules GAJA1 and GAJA2, respectively. GAJA1 is responsible for the direct input of the die-design problem regarding the shape, dimensions and material of the stamping part, its extraction in the form of geometric features, and the transferring of relevant design parameters and features to the module GAJA2. GAJA2 interprets the current values for the input parameters and automatically performs the modeling process of cutting die-components, using die-design knowledge and the company’s internal design and manufacturing standards. Experimental results show that this system significantly shortens the modeling-time for cutting the die-components, improves the modeling-quality, and enables the training of inexperienced designers. 相似文献
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冲压模具设计是一门集实践性、应用性为一体的专业课程,目前国内大多高校仍然采取较为传统的教学模式:CAD机械制图教学、冲压模具设计理论教学、冲压模具实践教学阶段,这种流程式教学大大降低了学生进行学习工作的积极性.而CAD机械制图与冲压模具设计的云端服务教学,通过将项目案例引入理论与实践操作教学中,不仅满足了学生的求知欲与好奇心,更能达到培养出满足相关企业岗位需求的人才,运用可自动生成图纸的PressCAD软件可以提升学生设计效率,让学生的创作灵感更好的体现出来. 相似文献
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刘良瑞 《黄冈职业技术学院学报》2008,10(3):12-14
在冲模设计中,压力中心常采用解析法或作图法求解,较复杂、易出错。采用三维CAD软件确定冲模压力中心的方法,分别用AutoCAD、Pro/E、UG软件求解其模具压力中心的步骤,快速、准确,值得推广使用。 相似文献
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F. P. E. DUNNE 《European Journal of Engineering Education》1993,18(3):269-276
An approach is presented, based on the use of commercial CAD/CAM software, for demonstrating the interdependent and integrated nature of the marketing, design and manufacture functions. A ‘T’-root turbine blade is considered from design through to manufacture using CAD/CAM software, and this approach enables varied and multidisciplinary aspects to be considered which reinforce other course material such as three-dimensional visualization, industrial design, net shape processing, and mechanics of materials. The approach is project-based and student-centred requiring active learning, and is intended to encourage student interest and enthusiasm in manufacturing technology. 相似文献
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在冲压过程中，机械运动贯穿始终．各种冲压工艺的实现都有其基本运动机理，这种成形运动是与模具密切相关的，各种模具的结构设计和力学设计最终都是为了满足其能够实现特定运动的要求．设计的模具能否严格完成实现冲压工艺所需的运动，直接影响到冲压件的品质，所以在模具设计中应对机械运动进行控制．同时为了达到产品形状尺寸的要求，不能拘泥或局限于各种工艺基本运动模式中，而应不断发展和创新，在模具设计中灵活运用机械运动． 相似文献
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赵印岐 《廊坊师范学院学报(自然科学版)》2012,12(2):44-45
随着机械制造业的稳步发展以及CAD技术的迅速进步,CAD在机械设计中应用逐渐成为一大关注焦点。文中介绍了CAD系统工作流程以及在机械设计中的应用,总结了CAD在机械设计中的优势及不足,并对CAD技术未来的发展进行了展望。 相似文献
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In product concept design, not only designers with professional CAD skills, but also final customers take part in the design and evaluation of product shape styling. Because customers usually lack surface modelling background and are not familiar with concrete operations of commercial CAD systems, it is difficult for them to express their change intentions of product shape through professional CAD tools if they are not satisfied with the current shape design. This paper puts forward a method for creating, dragging and manipulating constraint and load represented in form of icon entity in interactive sculpting of product shape in virtual environment. The method supports customers manipulation of sculpting constraints or loads on sculpting shapes in virtual reality interaction to control the deformation of product shape. Constraints management based on icon entity is similar to spline lofting operation that is familiar to engineers, so users do not need to know surface details or have any professional knowledge of surface modelling, by only using their physical and engineering experience, they can manipulate the sculpting of product shape intuitively. 相似文献
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何军 《十堰职业技术学院学报》2014,(4):103-106
本文从冲压模具的受力特点分析出发,说明了模具在冲压过程中所产生的磨损、崩刃、塑性变形、开裂、附着等失效特点,总结了在模具设计、模具制造、冲压生产过程中影响模具寿命的因素,提出如何采用经济的工艺手段,节约冲压成本的方法。 相似文献
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采用UGNX7．0软件的CAD功能对烟草移栽机链箱进行实体三维建模设计,通过UGNX7．0提供的机械制图功能,自动生成二维工程图,并转换为通用AutoCAD格式,运用AutoCAD软件进行标注并生成标准CAD图纸,按图纸要求进行加工制造,在制造的过程中采用UGNX7．0提供的CAM功能进行加工仿真,生成数控代码,最终完成整个设计及制造过程,为类似产品的设计及制造提供借鉴． 相似文献
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文章对U形车身碰撞盒进行了结构分析,按照结构特点对该零件进行了几何建模和有限元建模,从而进行了冲压成形数值模拟分析。 相似文献