共查询到20条相似文献,搜索用时 62 毫秒
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介绍了汽车覆盖件拉伸模的设计要点及主要的调试经验,并对汽车覆盖件在拉伸过程中容易出现的起皱和开裂现象进行了分析,从工艺分析、模具结构设计及调试等几个方面详细说明了拉伸模设计及调试的重要性。 相似文献
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冲压成形技术在冲压技术中是一门关键的技术.从产品设计、模具设计到模具开发制造完毕,最后在拉伸模调试时(产品成形过程).出现的拉伸件质量是多种多样的。通过对汽车覆盖件在拉延过程中的起皱和开裂现象进行分析,从产品、冲压工艺、拉伸模结构设计、冲压材料、模具调整技术及冲压条件等几个方面较详细地说明解决零件拉延起皱、开裂的方法和控制措施。 相似文献
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对汽车覆盖件在拉伸过程中的起皱和开裂现象进行了分析,并从工艺、设计、调试等方面较详细地说明了解决制件拉伸起皱、开裂的方法和控制措施. 相似文献
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在汽车研发过程中,为验证零件设计的制造可行性,装配焊接工艺的合理性,需进行样车试制,以提前发现问题,并在设计阶段将问题解决.软模开发能在短时间内,开发出成本低的零件,工艺及模具结构简单.但在模具调试时,容易出现开裂、起皱、甚至叠料缺陷.以某汽车轮罩为例,将CAE模拟分析技术引入软模开发中,缩短了调试时间,降低了修模成本,满足了软模开发的需要. 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