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刘亚东 《中国铸造装备与技术》1994,(5)
液压件铸造生产的技术进步直接影响着行业的发展。据1992年的不完全统计,我国有液压件铸件生产厂点52家,但普遍存在着管理与工艺装备水平落后、铸件质量差、生产效率低和技术力量薄弱等问题。据市场预测,到1995年我国液压件行业需铸件61810t,对行业内铸造厂点的技术改造已势在必行。 相似文献
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《稀有金属材料与工程》1999,16(6):41
真空压铸(Vacuum-DieCasting,VDC)是一项可供钛铸件生产厂选用、能提高铸件质量、降低成本的技术.由于钛铸件在航空工业中的应用持续增长,各生产厂家都在致力于寻求能降低生产成本以取代高成本社部件的生产方法,尤其是当今世界经济竞争激烈的情况下更是如此.因此,成本较低、机械性能与锻件相似的钛铸件,不仅可以取代现有的钛部件,还可以取代其它材料的部件.VDC技术即是为生产高质量、低成本钛铸件开发的。其铸件典型的应用包括飞机机体(如舱壁、刹车装置、齿轮、铰链等)以及其它航空航天和工业用零部件。压铸技术用于生产… 相似文献
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DZ029转向器支架铸造工艺改进 总被引:1,自引:1,他引:0
陕西金鼎铸造有限公司是陕重汽的专业铸件生产厂,为了改善铸件外观质量和提高生产效率,公司在2010年年初新建成了静压造型线.在静压造型线建成的背景下,我们对一批批量性的铸件进行了工艺改进,依靠静压线的特点,实现了造型工艺的优化,最终节约了成本,大幅度提高了生产效率. 相似文献
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发展高强度铸铁 促进铸件商品化 总被引:1,自引:0,他引:1
我国是铸件生产大国,年产1000多万吨,已跃居世界第二位,生产厂(点)有2万多个,对于一般中低档次的铸件生产蕴藏着巨大的发展潜力。但是,目前一般中低档次铸件的生产供大于求,市场竞争日益激烈,令许多本来就不景气的铸造企业更是举步维艰。对中国铸造业的去向和发展前景 相似文献
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新型型砂储运斗艾永泰,宋爱兰(第一拖拉机工程机械公司)第一拖拉机工程机械公司通用铸造厂是以单件小批量生产为主的铸件生产厂,因为产品多种多样,铸件牌号复杂,所以型(芯)砂的种类也较多。同时由于铸件形状和大小差异较大,批量又小,因此难于采用机械化造型,只... 相似文献
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介绍发动机缸体、缸盖铸件生产的总体工艺路线.目前大多数汽车发动机铸件生产企业都采用冲天炉-电炉双联熔炼,为防止铁液晶核减少、过冷度增加、白口化倾向较大,应控制电炉熔炼温度,避免长时间过热和保温;为确保铸件尺寸精度,铸型宜采用高密度造型,也可以采用呋喃树脂砂型或PEP-SET树脂砂型.根据国内目前情况,建议主体砂芯采用冷芯工艺,而水套等部位的砂芯采用覆膜砂工艺更为稳妥可靠. 相似文献
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通过对中小铸造企业设备维修历史和现状的分析,结合日本同类企业设备维修市场化和专业化的成功经验,阐述了中小铸造企业应更新观念,适时寻求设备维修的市场化和专业化的道路。同时期待尽早催生针对这一需求的专业维修公司,满足中小铸造企业设备维修之需。 相似文献
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对当前我国铸造企业技术改造中存在的问题进行了分析,指出铸造企业进行技术改造的目的可以归纳为提高能力、提高劳动生产率、提高产品质量、降低排放改善环境、降低能耗和达到可持续性生产,认为铸造企业进行技术改造的要点是:产品的市场调研、项目的可行性研究、稳妥的资金保障和严格的施工管理。 相似文献
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Kanetake NAKATANI 《中国铸造》2008,5(3):205-208
An introduction is given in detail about the current situation of Japanese foundry industry in 2006 from aspects such as the delivery structure of castings, scale and numbers of foundries, current profit of foundry industry as well as the background of lower profitability, etc. The development trend of Japanese foundry industry was also predicted, such as the transition of foundries from family business to modern company business, the improvement of rejection ratio and yield, application of IT to production and management, human resources and the challenge for zero emission and so on. 相似文献
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D. E. Groteke 《International Journal of Cast Metals Research》2013,26(6):341-354
The results of a study to identify the range of commercial gating systems used in American aluminium foundries are reported. Fifteen foundries using green sand moulding methods participated in the study by producing moulds of test castings using their “normal” shop gating systems. The foundries were asked to rig a common test pattern for a target volume of 1,500 pieces per month, produced to a “commercial” quality standard, and with an absence of visible porosity on machined surfaces. Information was also requested on essential melt and moulding media conditions, as well as a selling price for the castings.The evaluations included gating ratio and yield measurements, radiographic evaluations of subsurface quality, machining of cope and drag surfaces to reveal gating induced trapped air and dross, pressure testing of two drilled bosses, and a final liquid penetrant examination of the machined surfaces.Those features in the individual systems that appeared to produce the best results are summarised, as well as some undesirable practices that might have a negative influence upon casting quality. 相似文献
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铸造生产如何适应汽车工业的发展 总被引:1,自引:0,他引:1
通过对汽车工业与铸造产业关联度的剖析,指出对汽车铸造产品的主要要求是安全可靠性、节能、低成本和舒适性。说明铸造行业必须从质量管理、人才培养、新技术发展和应用等方面与汽车工业相适应,指出了汽车铸造业的发展方向是专业集群化批量流水线生产、铸件深加工等。 相似文献
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我国铸造工业之现状与展望 总被引:4,自引:2,他引:2
叙述了我国铸造工业历年来各地铸件的产量情况、各类机械产品消耗铸件的数量和进出口概况及对它们的评论等;然后介绍了铸造厂点的数量和地理分布;对铸造业内的品质、优惠政策,铸造装备和环境保护进行了讨论。并着重展望了我国铸造工业不久的将来,在产量、生产组织、生产工艺、领导素质等方面的发展。 相似文献
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The high efficiency mechanized foundry technology of castings produced by using water-cooled copper alloy permanent mold has been systematically studied. Through the researching a Cu-Cr-Mg alloy with high conductivity and good combined mechanical properties used for making permanent mold was developed, and the basic design principles of the water-cooled permanent mold along with the control-range of relevant foundry processing parameters were also established.A cast production line equipped with water-cooled copper alloy mold was designed and fabricated for production of ductile iron automobile gear castings. This production line can consistently make automobile gear castings in QT500-15 and QT600-5 (Chinese Standard) grades of ductile iron with up to 95 % casting success rate. 相似文献
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Linghua CAI 《中国铸造》2005,2(1)
1. General introduction
Zhejiang province is one of the most developed regions in Chinese foundry industry. There are more than 4 000 foundries there. Among them there are over 20 foundries whose annual output of castings exceeds ten thousand tons, and most of them are medium- or small-sized foundries.The annual output of castings in the entire province exceeds 1 850 000 tons, and more than100 000 tons are exported. There are approx.100 000 practitioners in the Province. 相似文献