模具技术2016.No.4
文章编号：1001-4934(2016)04-0021-05
复杂涡轮蜗壳零件金属型铸造模具设计
郑浩勇
（中航工业航宇救生装备有限公司，湖北襄阳441002）
21
摘要：涡轮蜗壳铸件结构复杂，零件要求致密，不允许存在内部缺陷。通过对涡轮蜗壳铸件结构、材料和铸造工艺性进行分析，介绍了金属型铸造模的结构设计，采用组合砂芯及金属成型银块设计消除铸件倒扣，简化了模具结构；合理设计浇注系统、冒口位置及排气方式，消除了铸造缺陷的产生。经生产注明，该模具结构合理，生产的铸件完全符合要求，且产品质量高。
关键词：涡轮蜗壳；金属型铸造模；组合砂芯；金属成型银块
中图分类号：TG241
文献标识码：B
Designofmetalcastingmouldforcomplexturbinespiral case
ZHENG Hao-yong
Abstract: The casting of turbine spiral case structure is complex, of which the internal mi-crostructure is dense, and does not allow the existence of casting defects. Based on the anal-ysis of the casting structure, material and casting process, the mould design of metal casting were introduced.The design of combined sand core and mctal forming insert climinated the undercut, and also simplified the mold structure. The reasonable design of gating system, riser structure and gas exhaust dispelled the casting defects. The production practice proved that the structure of the mould is reasonable, and the quality of castings is good, can also fully meet the requirements.
Keywords: turbine spiral case; metal casting die; combined sand core; metal forming insert
孔"]。该零件外形相对规整，但结构相对较复
铸件工艺性分析 1
涡轮蜗壳产品零件如图1所示，三维造型如图2所示，材料为ZL101，收缩率为0.6%左右。该铸造合金结晶温度范围窄，倾向于逐层避固方式，在最后避周部位极易产生集中缩
收稿日期：2016-03-11
作者简介：郑浩勇（1984一），男，工程师。万方数据
杂，批量适中，适合采用金属型铸造成型。铸件均匀壁厚4mm，右端面均勾分布9个凸台、上端及左端内外型面为后续机加面，需考虑加工余量3mm，其壁厚均达到10mm，这3处均为热节，需考虑补缩。