共查询到19条相似文献,搜索用时 62 毫秒
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粉末冶金模凸、凹模尺寸设计新方法陕西金山电气总厂工模具公司(721301)杨宏亮粉末冶金模具和冲我模、注射模相比较有很大的不同。粉末冶金模具的凸模、凹模及其它成形件在压制的过程中要受到很大的压力和摩擦力。为了获得符合要求的产品,除了模具的尺寸有要求外... 相似文献
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成形空心球模具凹模尺寸的确定河北晨光机械厂(河北保定07110)谷永章1引言随着人民生活水平的不断提高,空心球制件在工艺品、家俱等生活用品的装饰上应用越来越广泛。用机械加工方法不仅质量不易保证,且材料消耗多、加工费用高。而采用冲压加工空心球体形零件是... 相似文献
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首先简要介绍了基于Web定制的智能模架CAD系统,然后分析了该系统中常见的尺寸标注类型,对不同类型的尺寸标注提出了相应的标注方案,并给出了常见问题的解决办法,最后介绍了系统中尺寸标注的效果。 相似文献
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<正> 1 毛坯计算 翻孔成形的毛坯计算,一般按面积不变原理或简单弯曲的近似方法计算。采用小凹模圆角对零件一次性翻孔时,这些方法误差 相似文献
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分析了气膜片零件胀形质量差的原因,对原模具结构进行了改进,解决了原模具成形后贴模不理想、型面不准确的问题,提高了零件质量。 相似文献
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介绍了1副内腔直角、外形锥状、腔底有凸台并冲孔的板料成形拉深复合模的结构和工作过程。模具采用正装式复合模,板料在压紧状态下成形,冲制的零件精度较高,产品质量稳定。简述了模具设计要点。模具经生产检验,使用效果良好。 相似文献
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详细分析了某汽车外板拉延件的成形工艺,利用Dynaform分析软件对拉延件的成形过程进行数值模拟,获得了坯料流入量分布、拉延结果、板料厚度变化及FLD图等模拟结果.通过对模拟的结果分析,提出了减少成形缺陷的措施.根据分析结果进行拉延模具设计,确定了拉延模具结构及压力中心,设计了上模、压边圈及下模,详细阐述了其工作原理,并进行了实际冲压试验.结果显示,借助数值模拟技术实现了拉延模的结构优化、提高了模具设计效率与可靠性,并最终通过实际实验调试获得满足质量要求的汽车外板零件. 相似文献
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冲压模具标准件二维和三维参数化图库的开发思路 总被引:1,自引:3,他引:1
以AutoCAD2004作为开发平台、并以Access为后台数据库管理系统,论述了使用AutoCAD的二次开发工具VBA开发冲压模具标准件的参数化二维和三维图形库的思路,并以一典型实例说明了它的关键技术。本文还介绍了三维模架和三维冲压模具典型结构的装配方法,并对三维模具典型结构动画演示技术进行了探讨。 相似文献
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Jan W. Pilarczyk Henryk Dyja Bogdan Golis Elzbieta Tabuda 《Metals and Materials International》1998,4(4):727-731
In the work the effect of application of roller dies in process of drawing of high carbon steel wires for their structure,
texture, residual stresses, surface roughness and mechanical properties has been investigated. Among structural features alignment
of cementite lamellae to the wire axis by means of SEM and Pericolor 1500 has been quantitatively determined. Degree of cementite
lamellae fracture in colonies parallel to wire axis has been estimated by Langford method. Obtained results were compared
with those structural features for conventionally and hydrodynamically drawn wires. It has been found that degree of alignment
of cementite lamellae in wires drawn in roller dies was smaller than in wires drawn conventionally and hydrodynamically but
in the case of fracture degree the opposite result was noticed. Residual stresses were determined by electrochemical reversal
pickling in water solution of sulphuric acid. A significant drop of longitudinal residual stresses in surface layer of wires
drawn in roller die has been observed as compared to those stresses for conventionally and hydrodynamically drawn wires. Surface
roughness of wires was measured with FORM TALYSURF profilographometer. It has been proved thad roller die drawing has formed
very smooth surface with much smaller longitudinal and circumferential roghness parameters that for surface of wires drawn
conventionally and hydrodynamically. In the work the tensile, yield and fatigue strength of tested wires were determined.
It has been concluded that roller die drawing has many advantages as compared to conventional process and should be implemented
in wire industry for larger scale. 相似文献