共查询到20条相似文献,搜索用时 265 毫秒
1.
2.
3.
4.
圆管冲孔工艺与模具设计 总被引:1,自引:0,他引:1
通过对圆管冲孔的工艺分析,阐述了圆管冲孔模具设计特点,针对具体零件,设计了1副无凹模对冲模具,降低了生产成本,提高了产品质量和生产效率,为类似管材零件的冲孔加工提供参考。 相似文献
5.
6.
金坤焱 《锻压装备与制造技术》2015,50(3)
本文通过对汽车垫片的工艺分析、模具类型的方案论证以及排样的优化设计,优化了汽车垫片的模具装配图,介绍了凹模加工工艺过程、落料凸模加工工艺过程、冲孔凸模加工工艺过程、冲孔凸模加工工艺过程。希望对相关零件设计起到一定的借鉴和参考价值。 相似文献
7.
通过对精密垫圈冲孔落料工艺的分析,介绍了模具关键零件加工工艺的特点.根据垫圈零件的特点,提出了采用倒装复合模工艺,介绍了模具结构,同时对模具装配的关键过程作了介绍. 相似文献
8.
通过对立柱零件冲孔工艺及特点进行分析,并根据该零件的结构特点,提出了采用凹模冲孔加工。阐述了模具工艺计算、结构特点及工作过程,同时对凸、凹模的设计作了介绍。 相似文献
10.
分析了管子冲孔工艺的各种形式特点及难点.具体介绍了两种不同项出形式的有芯(有凹模)管子冲孔模的模具结构、工作过程及关键零件的设计制造.该模具的成功应用,拓展了有芯管子冲孔的加工工艺范围. 相似文献
11.
Deep hole drilling processes, which differ significantly from conventional drilling processes, are relevant for a lot of different applications where holes with high length-to-diameter-ratios and very good qualities are necessary. This paper gives an overview of different methods, which are established to produce bore holes with demanding aspects related to diameter, length-to-diameter-ratio, bore hole quality, workpiece materials and complex internal contours. Beside the detailed explanation of the deep hole drilling methods and tools also the fundamentals of the deep hole drilling principle are explained and completely new developed figures and tables summarize the state of the art. In addition for the most important areas the latest results of process and tool development are included. 相似文献
12.
任现伟 《中国铸造装备与技术》2020,(1):40-43
砂孔和渣孔是铸造过程中最常见的铸件缺陷类型。尤其是在湿型砂铸铁件生产中最为常见。虽然可以使用能谱分析仪和扫描电子显微镜对砂孔和渣孔加以明确区分,但多数铸造企业并不具备此检测条件,很多砂孔和渣孔凭目测很难得出准确定论。因此,将砂孔和渣孔放在一起进行了深入的研究。 相似文献
13.
14.
16.
17.
介绍了工艺孔在注塑模具中各个零件的应用。通过合理地设计工艺孔,既方便了模具的生产加工以及拆装或调试,提高装配效率,也保证了模具零件的加工精度,提高了模具的质量。 相似文献
18.
Joseph P. Cannon Steven D. Bearden Fauzia M. Khatkhatay Joseph Cook Sandra Zivanovic Selmic Scott A. Gold 《Synthetic Metals》2009,159(17-18):1786-1791
Template wetting nanofabrication was used to create high-aspect-ratio, nanotubular structures from the semiconducting polymer poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene). Carrier transport in these nanostructures was determined to be space-charge-limited and thermally activated, with low-field mobilities shown to up to three be orders of magnitude higher than those typically reported for thin-films of the same material. Ultraviolet–visible spectroscopy showed a 0.3–0.6 eV reduction in the leading-edge absorption energy of polymer nanotubular structures compared to thin-films or solutions. Photovoltaic devices constructed from the nanotubes demonstrated photovoltaic fill factors superior to those measured in similarly constructed thin-film devices. These results are indicative of a confinement-induced ordering present in the nanotubular material. 相似文献
19.
20.
《Synthetic Metals》1996,78(1):79-83
Thin homogeneous films exhibiting effective hole transport with drift mobility values up to 10−4 cm2 V−1 s−1 are formed in the process of vacuum thermal deposition of monomeric diaryldiacetylenes. Basic transport characteristics and their dependence on the electric field, temperature and chemical composition of the monomers are determined. 相似文献