共查询到20条相似文献,搜索用时 265 毫秒
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对某车型前门内板落料工艺及模具结构进行分析,得出将原开卷落料生产方式改造为定尺料落料方式,通过增加定位和切边刃口,实现定尺料经两次落料后得到最终坯料。并对模具的自动化生产进行调试匹配,使落料模满足批量生产要求。为了保证落料的尺寸精度,根据落料排样图以1∶1比例制作泡沫板,用于调试阶段与板料进行比对,判断落料状态是否满足后序生产。自动化调试完成后,对3批次量产进行跟踪,以验证落料模的稳定性,并对后序3批次冲压生产进行跟踪,以验证落料后坯料的稳定性。生产结果表明:经定尺料落料的坯料,成形状态稳定,产品质量满足要求;经工艺改造后的落料模,自动化生产状态稳定。此次改造节约了重制落料模的费用,降低了生产成本,也为同行业实施降本生产提供了思路和参考。 相似文献
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介绍了一种汽车车门内板冲压工艺方案,以及上模带双模腔特征、多压料芯结构的轿车车门内板修边整形模的应用,通过对车门内板冲压工艺及模具结构分析,采用拉深后先整形再周圈修边的工艺方案,并结合CAE仿真模拟分析进行产品结构及工艺模面优化,有效解决了成形开裂及起皱问题。在修边整形模中,采用内外双排侧销控制的内压料芯及左/右外压料芯结构,使待整形区域整形时两侧同时压料,整形时发生胀形及加工硬化,在产品形状实现的同时,也可促进产品周圈刚性的提升,减少回弹变形。实际生产证明,该冲压工艺方案有效可行,已实现大批量生产,车门内板单件精度、品质及包边总成效果都较好。 相似文献
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汽车后拖钩支架零件的材料为高强钢板DP600,是汽车轻量化过程中用量较多的一种材料。通过分析其零件特征,制定了连续模落料冲孔折弯成形翻边整形冲孔的冲压工艺。针对其中的连续模落料冲孔工序,设计了复合排样,使其材料利用率达到71.56%;并在连续模具中设计两个工位分别对零件进行冲孔落料;计算冲裁力、设计模具刃口尺寸及模架结构;选择机械压力机STD-300为冲压设备;设计了冲孔落料连续模的卸料装置、浮料装置和支撑结构,以便落料件和废料分别从模具两侧排出。在模具制造中,对主要工作部件采用镶块结构,便于模具的调试。试验结果表明,使用该模具生产的零件尺寸精度符合图纸要求,生产节拍大于30次·min-1。 相似文献
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介绍了一种开卷落料自动线双出料模具结构以及工艺方案,并分析了收集坯料的设计方法和设计思路,可为类似开卷落料模具设计提供参考。该模具结构方案可以提高模具生产效率,提升材料利用率。 相似文献
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A. A. Babakov 《Metal Science and Heat Treatment》1967,9(10):764-770
Conclusions Highly alloyed steels and alloys are produced in conformity with GOST or technical specifications in thick and thin sheets, beams and channels, bars, hot-rolled and cold-rolled pipe, and rod. Castings are produced in the specialized plant of the Ministry of Chemical and Petroleum Machine Building.The technology of welding stainless steels and alloys is given in [15] and [16].TsNIIChERMET. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 43–50, October, 1967. 相似文献
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模具渗硼工艺及其发展应用 总被引:4,自引:0,他引:4
渗硼是提高模具使用寿命的重要途径,是在金属表面形成高硬度的金属硼化层,显著提高其耐磨性,且具有良好的耐热性和耐蚀性。近年来,随着渗硼工艺逐步改进和完善,已发展了复合渗、多元共渗及低温渗硼工艺,取得了良好的经济效果。 相似文献
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《稀有金属材料与工程》2006,23(4):23-26
结合近年来现场试验与施工实践,分析研究了中小型镍材(工业纯镍)设备与管道的特点、性能、焊接缺陷与产生原因,以及防止与消除其缺陷、优化制造施焊质量的工艺措施,并总结了若干条注意事项。 相似文献
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A. Yu. Tsivadze G. V. Ionova V. K. Mikhalko 《Protection of Metals and Physical Chemistry of Surfaces》2010,46(2):149-169
The possibility of using unique properties of lanthanides in the nanotechnology is demonstrated. The origination of linear
and nonlinear optical properties of lanthanide compounds with phthalocyanines, porphyrins, naphthalocyanines, and their analogs
in solutions and condensed state and the prospects of obtaining novel materials on their basis are discussed. Based on the
electronic structure and properties of lanthanides and their compounds, namely, optical and magnetic characteristics, electronic
and ionic conductivity, and fluctuating valence, molecular engines are classified. High-speed storage engines or memory storage
engines; photoconversion molecular engines based on Ln(II) and Ln(III); electrochemical molecular engines involving silicate
and phosphate glasses; molecular engines whose operation is based on insulatorsemiconductor, semiconductor-metal, and metal-superconductor
types of conductivity phase transitions; solid electrolyte molecular engines; and miniaturized molecular engines for medical
analysis are distinguished. It is shown that thermodynamically stable nanoparticles of Ln
x
M
y
composition can be formed by d elements of the second halves of the series, i.e., those arranged after M = Mn, Tc, and Re.
Prospects of using lanthanide superconductors in nanotechnology are considered. 相似文献