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楔横轧是一种生产轴类零件的新工艺、新技术。它是现代化轧钢技术的新发展,即高效率的轧制技术代替锻造、铸造和切削的方法,生产某些批量大的轴类零件,实现冶金产品的深度加工。淮阴特种轧钢厂H1000楔横轧车间项目,经冶金部科技司批准,由北京科技大学和淮阴冶金公司合作,于1986年5月开始研制,1988年6月建成完工,经一年多的研制与试生产,已生产出各种轴类另件毛坯五万件,1990年4月14日通过冶金和机电工业部的部级鉴定,初步建成华东地区楔横轧轴类专业工厂。 相似文献
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楔横轧是本世纪六十年代发展起来的,适应机械加工中少切、无切削要求的一种新型轴类(毛坯)轧制新工艺。淮阴市冶金工业公司根据市场对经济断面钢材的需求,从当地实际情况出发,与北京钢铁学院合作,兴建楔横轧生产流水线精密轧制轴类毛坯。拟将为地方冶金企业挖掘自身潜力、进行产品延伸探索出一条新路。本文就楔横轧技术作一简单介绍。 1.“楔横轧制”简介 1.1.楔横轧原理:楔横轧也称楔形模横轧。它是在2~3个互相平行布置的轧辊 相似文献
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介绍了轴类零件轧制技术的工作原理和主要特点,简述了国内外轴类零件轧制技术发展情况。北京科技大学在山东省推广20余条零件轧制技术生产线,主要有楔横轧凸轮轴和空心零件、斜轧内燃机的摇臂等。 相似文献
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本文针对楔横轧工艺生产的20CrMnTiH钢细长多阶梯锥形轴零件尾部中心疏松、孔洞缺陷进行了分析,结果表明,成分设计、楔横轧工艺参数以及原料的中心疏松三种因素的耦合作用是造成该工件尾部中心缺陷的原因。在确保原料的冶炼轧制全过程产品质量控制的基础上,采用了优化的产品成分设计及楔横轧复合轧制工艺,取得良好的效果。 相似文献
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机械结构轻量化的主要途径是在结构上采用空心轴.近年来, 采用楔横轧带芯棒轧制空心轴类件的工艺得到了较广泛的关注.厚壁空心轴类件在楔横轧轧制过程中易发生“失圆”现象.本文通过热压缩实验研究了25CrMo4合金钢在楔横轧变形条件下热变形行为, 获得其真应力-应变曲线.在此基础上, 基于Deform-3D有限元软件, 建立25CrMo4厚壁空心轴楔横轧有限元仿真模型, 分析厚壁空心轴楔横轧成形机理, 研究得出断面收缩率、成形角、展宽角对轧件不圆度的影响规律: 断面收缩率增大, 不圆度减小; 成形角增大不圆度减小, 轧制温度越高减小趋势越明显; 展宽角增大不圆度增大, 提高轧制温度抑制增大趋势.选取部分工艺参数进行楔横轧验证实验, 对比了有限元仿真结果和实验结果, 表明有限元仿真模型预测精度较高. 相似文献
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<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic 相似文献
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正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform. 相似文献
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正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness. 相似文献
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正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully. 相似文献