人教版五年级数学上册第七单元数学广角——植树问题《....ppt

人教版五年级数学上册第七单元数学广角——植树问题《..._1508691202学兔兔
铸造 Jun。2015
FOUNDRY
支架类铸件熔模铸造工艺研究
王丽萍,孙长波,高成薇,赵经武z,王永明
(,辽宁沈阳 110043;,辽宁沈阳 110004)
摘要:介绍了支架类铸件熔模铸造的工艺路线及主要工艺方案。通过合理制定铸件的制模、浇注系统组合、制壳、
浇注等工艺方案,解决了铸件在生产过程中出现的疏松、冷隔、变形等铸造缺陷。改进后的工艺不但提升了产品质
量,而且可为同类铸件的熔模铸造工艺提供参考。
关键词:熔模铸造;浇注系统;疏松
中图分类号: 文献标识码:A 文章编号:1001—4977(2015)06—0528—03
InvestmentCasting ProcessforBracket KindsCastings
W ANGLi—ping ,SUN Chang—bo ,GAO Cheng-wei ,ZHAO Jing一、Ⅳu2,WANG Yong—ming
(&Technology Casting Power ShenyangPrecision Co.,Ltd.,Shenyang 10043,Liaoning,China; 1
University,Shenyang 1 1 0004,Liaoning,China) 1 1 University,
Abstract:The process route and scheme ofinvestment casting for bracket castings were
casting defects suchporosity,cold as shut,deformation were solvedby making reasonablecasting molding,
pouting system,shell making,pouting scheme, research resultsnot only can improve the product
quality,but also provide experience for similar investment casting technology. investmentcasting similar experiencefor provide also quality,but
Keywords:investment casting;gating system;porosity
树脂)配制而成,按其熔点不同可分为高温模料、中
1 1 铸件结构特点及技术难点温模料和低温模料三大类。对于薄壁类结构件我们通
支架类铸件是安装在发动机上起支撑作用的复杂常选用松香基的中温模料,典型的成分为:松香50%+
结构件,该类铸件采用ZG0Cr17Ni4cu3Nb合金,采用地蜡2O%+聚苯乙烯30%。该类蜡料性能稳定,流动性
非真空浇注工艺获得金属铸件。铸件整体呈“Z”型结及涂挂性能较好,经试验,压