摘要
在挤压过程中,固定挤压垫承受长时间高温、高压和摩擦作用,工作条件复杂。针对55MN铝挤压机固定挤压垫,利用有限元软件MSC.Marc建立三维有限元分析模型,将垫体、外套与紧固垫设置为可变形接触体,同时考虑温度影响,应用直接耦合法进行热-结构分析,确定了随工作载荷逐级增加,外套工作面节点径向胀量呈递增趋势,且存在快增、缓增和稳增3个不同速率区间,为固定挤压垫进一步优化设计提供了依据。
The fixed dummy block bears high temperature,high pressure,and friction under complex working condition.The three dimensional finite element analysis model of fixed dummy block of 55 MN aluminum extrusion press was established using finite element software MSC.Marc,which includes pad block,outer jacket,and fastening pad block as deformation contact body,and considering temperature effect,the thermal-structure analysis was carried out using direct coupling method.It indicates that working surface node radial expansion of the outer jacket is gradually incremental with successive working load,and has three different increase intervals of rapid,slow and steady rate.These conclusions provide a reference for optimal design of fixed dummy block.
出处
《锻压技术》
CAS
CSCD
北大核心
2011年第5期170-172,共3页
Forging & Stamping Technology
关键词
挤压机
固定挤压垫
胀量
热-结构分析
extrusion press
fixed dummy block
expansion
thermal-structure analysis
