固定挤压垫修形方法优化  

Modify method optimization of fixed dummy block

作　　者：段丽华[1,2] 苏振华[1,2] 邱立朋[1,2] 胡阳虎[1,2] 郭晓锋[1,2] 张立波[1,2] 马海宽[1,2] 张一凡 

机构地区：[1]中国重型机械研究院股份公司,陕西西安710032 [2]金属挤压与锻造装备技术国家重点实验室,陕西西安710032 [3]中国三安建设有限公司,陕西西安710043

出　　处：《重型机械》2014年第5期60-63,共4页Heavy Machinery

基　　金：国家重大科技专项(04专项)(2009ZX04005-0312011ZX04016-081);陕西省重点科技创新团队项目(2013KCT-10)

摘　　要：针对某铝挤压机在挤压过程中出现的铝倒流现象,分析了该挤压机固定垫的受力情况。由于挤压垫达不到预期涨开量,使挤压筒和挤压垫之间产生了间隙,是引起铝倒流的主要原因。采用有限元法模拟挤压垫的工况,再应用位移协调公式计算组合挤压筒的内壁涨开量,对比计算结果并优化相关参数,提高固定挤压垫的设计精度。实践证明,优化后的固定挤压垫使用效果良好。It occurs in the extrusion process that aluminum reverse flow, when an aluminum extrusion machine is working. This paper analyzes the force of the extrusion press fixed dummy block. The main reason about aluminum reverse flow is that opening size of fixed dummy block is fail to meet the expected requirements, which lead to have a gap between extrusion cylinder and dummy block. Working condition of dummy block is simulated by finite element method, opening size of combined extrusion cylinder internal diameter is calculated by using displacement coordination formula. It improves accuracy of designing fixed dummy block, through comparing calculation results and optimizing relevant parameters. Practice proves that optimized block works well.

关 键 词：固定挤压垫 涨量 修形方法 位移协调公式 

分 类 号：TH39[机械工程—机械制造及自动化]