共查询到18条相似文献,搜索用时 78 毫秒
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基于模具工业的重要性,综述了模具的新加工方法,其中重点介绍了高速铣削加工、电加工、压铸成形工艺及模具的热处理技术;根据模具制造技术的发展趋势,简述了模具工业的计算机辅助设计与制造、逆向工程及快速成形技术;展望了模具制造的大型化、精密化、复杂化及长寿命的发展方向。 相似文献
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通过介绍激光快速成形技术的原理和特点、常用材料及工艺,分析了激光快速成形技术适合模具的小批量或单件生产,且可以解决传统模具制造业中制造周期长、工艺复杂的问题,阐述了激光快速成形技术在模具制造业中的优势。 相似文献
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快速成形技术是20世纪80年代发展起来的一种集计算机辅助设计、精密机械、数控、激光技术和材料科学为一体的全新制造技术.由于其高度柔性和快速性,得到了广泛的研究和应用.以快速成形为技术支撑的快速模具制造作为缩短产品开发时间及模具制作周期的先进制造技术已成为当前的重要研究课题和制造业核心技术之一.本文介绍了立体光刻技术、薄材叠层成形、选区激光粉末烧结、熔融沉积成形等快速成形典型工艺方法,阐述了用快速成形技术直接、间接制造金属模具和非金属模具的原理、工艺和研究现状,并对快速成形技术在模具制造中的应用前景作了展望. 相似文献
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快速模具制造技术的现状及其发展趋势 总被引:32,自引:3,他引:32
快速成形与制造(RP&M)作为诞生仅十余年的先进制造技术,已成功地实现了快速原型制造,目前正向快速模具制造(RT)方向迅速发展。主要介绍了快速制模尤其是快速金属模具制造(RMT)技术的现状和发展趋势,比较和分析了模具快速制造的间接法和直接法的特点和问题,探讨了快速模具制造技术发展面临的关键问题及其应用前景。 相似文献
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从汽车和摩托车工业对铝合金压铸件要求入手,介绍了压铸模具的特点与要求,在此基础上,分别对高速切削加工技术和快速原型制造技术进行了讨论,进而探讨了模具制造中的快速制造技术和RPM技术的应用情况,最后对快速制造技术在压铸模具制造中的应用前景进行了展望. 相似文献
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Sadegh Rahmati Phill Dickens 《International Journal of Machine Tools and Manufacture》2007,47(5):740-747
Increasing competition in global markets is exerting intense pressure on companies to trim their product cycles continuously. As delivery times and costs of tools are on a downward trend, the modern tool manufacturer is under pressure to produce tools quickly, accurately and at a lower cost. Reducing the time to produce prototypes is a key to speed up the development of new products. Rapid tooling (RT) with particular regard to injection mould fabrication using rapid prototyping (RP) technology of Stereolithography (SL) may lead to savings in cost and time. In this paper, SL is used to directly build rapid injection mould tools for short run production. SL tools have been evaluated to analyse the maximum number of successful injections and quality of performance. SL epoxy tools were able to resist the injection pressure and temperature and 500 injections were achieved. The tool failure mechanisms during injection are investigated and tool failure either occurs due to excessive flexural stresses, or because of excessive shear stresses. 相似文献
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P. Dunne S. P. Soe G. Byrne A. Venus A. R. Wheatley 《Journal of Materials Processing Technology》2004,150(3):201-207
Injection moulded components are finding vigorously increasing applications in numerous sectors. The flexibility of the process allows complex components to be manufactured in high volumes in fully automated environments. Associated with such components are equally complex tools whose manufacture is both expensive and time consuming. It is therefore vital that the component design be evaluated thoroughly with regard to both performance and manufacturability before commitment is made to expensive production tooling. The use of a physical prototype often provides the best method of design evaluation. The major routes to prototype manufacture are; material removal, rapid prototyping and rapid tooling. Rapid tooling techniques provide the most representative route, with the ability to produce polymeric prototypes (often in final material) by an injection moulding process.
Research has been undertaken into two rapid tooling processes; enhanced silicone moulding and sand moulding. Both processes involve casting material against a rapid prototype (master pattern) to form a mould which is then used in the manufacture of product prototypes by injection moulding. The focus of this paper is on the demands of these tooling techniques placed on rapid prototypes when used as master patterns. The demands are discussed in terms of surface finish, surface porosity, dimensional accuracy, thermal resistance and thermal expansion. 相似文献
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加速发展我国的快速成形技术 总被引:4,自引:1,他引:4
介绍了第二届北京国际快速成形及制造会议概况,分析了快速成形(RP)技术的发展趋势,指出RP技术研究领域的重大进展及学科发展的主攻方向是:由RP向快速制造(RM)发展,由RP向快速模具(RT)发展,RP技术在生物医学领域的应用。 相似文献
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介绍了模具制造中的一项新技术——快速成型制造的工作原理,并从模型处理和参数设置两方面提出了提高成型精度及成型效率的方法。同时探讨了成型过程中容易出现的问题,并从成型工艺上提出了解决的办法。 相似文献