Analysis and Improvement of Surface Defects in Inner Cavity of High Accuracy Impeller Castings

Ye Zonglin; Zhu Xiaofei; Ye Xiaofeng; Hua Hongyun; Zhang Nianyu; Li Xinglong

doi:10.15980/j.tzzz.2013.03.026

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Analysis and Improvement of Surface Defects in Inner Cavity of High Accuracy Impeller Castings
Vol. 33, Issue 3, Pages: 256-258(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.03.026

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[1]叶宗林,朱晓飞,叶晓峰,华红云,张年玉,李兴龙.精铸离心泵叶轮铸件内腔表面缺陷的分析与改进[J].特种铸造及有色合金,2013,33(03):256-258.

Ye Zonglin, Zhu Xiaofei, Ye Xiaofeng, et al. Analysis and Improvement of Surface Defects in Inner Cavity of High Accuracy Impeller Castings. [J]. Special Casting & Nonferrous Alloys 33(3):256-258(2013)
[1]叶宗林,朱晓飞,叶晓峰,华红云,张年玉,李兴龙.精铸离心泵叶轮铸件内腔表面缺陷的分析与改进[J].特种铸造及有色合金,2013,33(03):256-258. DOI： 10.15980/j.tzzz.2013.03.026.

Ye Zonglin, Zhu Xiaofei, Ye Xiaofeng, et al. Analysis and Improvement of Surface Defects in Inner Cavity of High Accuracy Impeller Castings. [J]. Special Casting & Nonferrous Alloys 33(3):256-258(2013) DOI： 10.15980/j.tzzz.2013.03.026.

摘要

借助内窥镜

可快速地分析高精密叶轮铸件内腔铁豆缺陷的产生原因。通过改进尿素熔化装置

控制尿素液温度

有效地去除了尿素芯浅表面皮下气孔缺陷

改善了高精密叶轮铸件内腔铁豆缺陷。通过更改叶轮模具结构设计

采用断开粘接形式

叶轮内腔叶片采用铝制抽芯做出

可有效改善叶片表面质量

满足客户对叶轮内表面粗糙度的要求。

Abstract

Origination of iron sweat in the inner cavity of high accuracy impeller castings was presented by endoscope.Gas porosity defect in sub-surface of urea core can be eliminated increasingly by the improvement of urea melting unit to control liquid urea temperature

thereby iron sweat in the inner cavity of high accuracy impeller castings is relieved.A modification on structural design for impeller molding with a separate adherence and an aluminum loose piece core for blades in impeller internal cavity can improve significantly surface quality to meet customers’ requirements on surface roughness.