共查询到19条相似文献,搜索用时 265 毫秒
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激光选区粉末烧结快速成形技术在精密铸造中的应用 总被引:1,自引:0,他引:1
快速成形技术是将三维CAD模型快速直接转化为实物的新技术.本文介绍了激光选区粉末烧结快速成形技术和精密铸造相结合,快速制作铸件的过程和工艺.探讨了制造精密铸造用蜡模的工艺路线和应用实例.与传统方法相比,具有速度快、精度高、价格便宜等优点. 相似文献
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快速成型技术及其在铸造中的应用(续完)--金属零件无模具快速铸造 总被引:1,自引:0,他引:1
快速成型工艺结合精密铸造技术是快速制造金属零件的主要途径。本文介绍了以选择性激光烧结(SLS)快速原型制造和真空压差铸造为基础的金属零件快速制造技术;着重描述了由SLS塑料原型快速制取陶瓷型壳并在真空压差浇注成形的工艺方法,得到了较高的零件精度和很好的零件性能;解决了新产品开发中金属零件快速制造的关键问题,同时也为快速成形技术在铸造中的应用开辟了一个新领域。 相似文献
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介绍快速成形技术和铸造技术相结合的快速铸造技术.利用快速成形技术直接或间接制造铸造用消失模、消失模凹模、铸造模样、模板、铸型、型芯或型壳等,结合传统铸造工艺,快捷地制造金属零件.将快速成形原理引进到铸造造型工艺中,在型砂或陶瓷粉末上喷射粘接剂和催化剂,固化后即得一定厚度的铸型,形成快速铸型制造工艺,在铸型的内表面涂敷或浸渍涂料即可用于浇注金属件.快速铸造技术能提高生产效率,适合各种复杂零件的单件小批量生产,具有广阔的应用前景. 相似文献
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基于三通管的快速模具制造及在铸造中的应用 总被引:1,自引:1,他引:0
以三通管为例,具体讲述了快速模具制造及铸造的整个工艺过程.试制结果表明,快速模具制造和铸造技术的结合,使产品具有制造周期缩短、制造成本降低、铸件质量好等优点,体现了快速模具制造的优势,也为快速模具制造技术在铸造技术中的应用开辟了新的途径. 相似文献
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快速成型技术主要基于离散-堆积成形原理,是一种先进的制造方法和制造手段。快速成型技术与传统的铸造相结合,不仅可以提升铸造产品的质量,而且可以制造更多的更复杂的铸件,还能够节约成本提高效率。通过对快速成型技术及方法的介绍,进一步阐述了基于快速成型方法的石膏型精密铸造工艺、基于覆膜砂激光快速成型方法的铸造工艺、基于快速成型方法的冷冻铸造工艺等。 相似文献
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微脉冲MIG焊技术在修复工模具中的应用 总被引:3,自引:1,他引:3
微脉冲MIG焊技术采用断续的微脉冲电弧的能量,将可熔性电极材料熔融,连续不断地堆焊到工件表面,形成堆焊修补层,这种技术适用于修补成型模具,热锻压模具及各种塑料模具的铸造缺陷,磨损,小面积局部剥落,损伤,划沟等。 相似文献
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ZL201曲面薄壁件挤压铸造工艺及模具设计 总被引:1,自引:1,他引:1
根据厂家提出的要求、结合帽盖零件产品结构特点和加工难度,确定了用ZL201合金挤压铸造成形工艺制坯,替代LY12合金棒料生产曲面薄壁帽盖零件,设计并制造了两套帽盖零件毛坯挤压铸造模具.两套模具的区别主要在凹模部分,其中一套属于间接加压,凹模带有溢料槽,另一套属于直接加压,凹模为组合式. 相似文献
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The role and impact of 3D printing technologies in casting 总被引:1,自引:0,他引:1
3D printing is such a magical technology that it extends into almost every sector relating to manufacturing, not to mention casting production. In this paper, the past, present and future of 3D printing in the foundry sector are profoundly reviewed. 3D printing has the potential to supplement or partially replace the casting method. Today, some castings can be directly printed by metal powders, for example, titanium alloys, nickel alloys and steel parts. Meanwhile, 3D printing has found an unique position in other casting aspects as well, such as printing the wax pattern, ceramic shell, sand core, sand mould, etc. Most importantly, 3D printing is not just a manufacturing method, it will also revolutionize the design of products, assemblies and parts, such as castings,patterns, cores, moulds and shells in casting production. The solid structure of castings and moulds will be redesigned in future into truss or spatially open and skeleton structures. This kind of revolution is just sprouting, but it will bring unimaginable impact on manufacturing including casting production. Nobody doubts the potential of 3D printing technologies in manufacturing, but they do have limitations and drawbacks. 相似文献
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对等离子弧喷涂法快速制模技术进行了基础实验研究。介绍了等离子弧喷涂法快速制模的工艺过程,分析了影响等离子弧喷涂成形的主要因素,试验研究了等离子弧喷涂层的结构和质量,井将该技术用于模具的快速制造。 相似文献
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The application of additive manufacturing technology is one of the main approaches to achieving the rapid casting. Additive manufacturing technology can directly prepare casting molds (cores) with no need of patterns, and quickly cast complex castings. The combination of additive manufacturing and traditional casting technology can break the constraint of traditional casting technology, improve casting flexibility, and ameliorate the working environment. Besides, additive manufacturing promotes the realization of "free casting", greatly simplifying the processing procedures and shortening the manufacturing cycle. This paper summarizes the basic principle of additive manufacturing technology and its development situation domestically and overseas, mainly focusing on the development status of several main additive manufacturing technologies applicable to the foundry field, including three-dimensional printing, selective laser sintering, stereolithography, layered extrusion forming, etc. Finally, the future development trend of additive manufacturing technology in the foundry field is prospected. 相似文献