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压铸模型腔表面热应力理论模型
作者:潘成刚   作者单位:武汉科技大学   期刊:
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作者简介

中文摘要

摘要:根据热弹塑性理论,建立了多次连续压铸时压铸模型腔表面的热应力模型。以铜合金压铸为例,分析了铜合金压铸时离H13钢模具型腔表面不同距离点的热应力时间变化曲线。结果表明,离压铸模型腔表面距离越近的点热应力值及波动幅度越大。离铜合金压铸模表面3 mm以内区域以低周热疲劳失效为主,5 mm以外的区域以高周热疲劳失效为主, 3~5 mm区域介于高周热疲劳失效和低周热疲劳失效之间。

关键词: 压铸模;热应力;模型;铜合金

中图分类号 :TG249.2  文献标志码:DOI:10.15980/j.tzzz.2017.12.015

 

发布日期:2017年第37卷第12

英文摘要

Analytical Model of Thermal Stress for Cavity Surface of Die Casting Die

Pan Chenggang1 , Liu Dudu1 , Ma Wenchao2, Chang Qingming1 Wu Qiong3  

(1.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of EducationWuhan University of Science and Technology; 2. Jiangsu World Electromechanical Group Co.Ltd.; 3.The Huaihe River Commission of the Ministry of Water Resources)

Abstract: According to the thermal elasto plastic theory, thermal stress model of cavity surface of die casting die during multiple die casting cycles was established, and the thermal stress to time curves of different depth points from cavity surface were analyzed. The results reveal that the point at the near distance from cavity surface exhibits a large thermal stress and thermal stress fluctuation. The die surface area within 3 mm is controlled mainly by low cycle thermal fatigue failure, while the area outside 5 mm is dominated by high cycle thermal fatigue failure, and the 3~5 mm region is between high cycle thermal fatigue failure and low cycle thermal fatigue failure.

Key Words Die Casting Die, Thermal Stress, Model, Copper Alloy

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