您好,欢迎进入特种铸造及有色合金杂志社的网站

首页  >>  文章索引   >>  压力铸造压力铸造

局部挤压降低压铸发动机支架的气孔缺陷
作者:张志斌   作者单位:浙江工业大学   期刊:特种铸造及有色合金
关键字:   出版单位:特铸杂志社

作者简介

中文摘要

摘要:利用Magma软件对汽车发动机支架高压压铸(HPDC)过程进行数值模拟,验证了支架缺陷类型及位置与实际生产的一致性。分析得出了其气孔缺陷较高的原因是铸件高低分型大、壁厚不均及浇口过早的凝固,导致气体难以排出,且远端无法得到压力的良好作用,故形成气孔缺陷。通过分析气孔形成原因及其位置,设计局部挤压装置,利用局部挤压工艺解决远端承载孔周围存在的气孔缺陷问题。运用射线实时成像技术进行验证,从而建立将局部挤压工艺与高压压铸及CAE相结合的发动机支架铸件生产方式,使发动机支架局部气孔率降低至0.6%,有效提高了产品品质。

关键词:发动机支架;局部挤压;压铸;气孔率;数值模拟。

中图分类号:TG249.2TG146.21    文献标志码  A       DOI:10.15980/j.tzzz.2017.10.013

 

刊期2017年第37卷第10

英文摘要

Elimination of Gas Hole in the Engine Bracket by Local Squeezing Casting

Zhang Zhibin1, Gao Ziwei1,Chai Guozhong1, Pan Xiaoyong2, Fu Chunming2, Bao Yumei1

(1.School of Mechanical Engineering, Zhejiang University of Technology;2. Ningbo Tuopu Group Co., Ltd.)

Abstract:With the help of Magma software, the high pressure die casting process of automobile engine bracket was simulated. The results show that the brackets defects type and location predicted are well agreement with practical ones. The uneven part surface and thickness and gate solidification ahead result in difficulties in exhausting air , together with the poor effect of pressure at the distal end, which are responsible for generation of gas hole. Through analysis of gas hole formation and locationlocal squeezing device was designed to solve gas holes around the distal bearing holeand it was observed by X-ray imaging system. Thus,the efficient engine bracket production mode combining with local squeezing process and high pressure die casting as well as CAE analysis was established, which could reduce gas hole rate in the engine bracket to 0.6%,improving effectively production efficiency.

 

Key Words: Automobile Engine Bracket, Local Squeeze, Die Casting, Porosity, Numerical Simulation

相关文章



设为首页 | 加入收藏 | 访问统计

版权所有:《特种铸造及有色合金》杂志社(武汉) 电话:027-85358206 027-85486024 传真:027-8535812 备案信息:鄂ICP备15003736号 网站建设武汉网户

鄂公网安备 42010302000230号