摘要
奥氏体不锈钢涂料支架结构复杂,铸件壁厚较厚,铸造表面精度要求高,精密铸造工艺性差。为此采取了一些措施:增加工艺筋,减少变形趋势;采用冷蜡芯的制蜡工艺,减少了射蜡量和射蜡时间,解决了蜡模表面流纹、凹陷、变形等问题;模具采用了曲面复合分型、斜面复合分型和多个活块的三开模技术方案解决了起模问题;模具结构采用双导轨和加长定位销套复合定位方式从而提高模具的定位精度和模具使用寿命。铸件使用特殊综合检验技术进行综合的尺寸公差、形位公差、加工量的检验,保证了铸件的质量要求。
The structure ofaustenitic stainless steel coating bracket is complex, the wall is thick, with relatively high surface precision, precision casting processing property is poor. Some measures were adopted. By increasing the process ribs, the deformation trend of wax piece have been reduced. The injection quantity and injection time is reduced; the problem of wax surface rhyolite, depression, and deformation is solved by using cold wax core. By using of the curved surface and inclined composite typing~ and multiple loose pieces three-section mould technology, the pattern drawing problem has been solved. The die structure was designed with double guide rail and a lengthened locating pin sleeve composite position to improve the positioning accuracy and the service life of the die. The casting quality requirements have been are guaranteed by the use of special comprehensive inspection technology to testing size, form and position tolerances, machining quantity.
出处
《铸造》
CAS
CSCD
北大核心
2013年第10期964-968,共5页
Foundry
关键词
精密铸造
模具结构设计
冷蜡芯
precision casting
structure design of die
cold wax core
