English

应用科学学报 ›› 1998, Vol. 16 ›› Issue (1): 121-126.

• 论文 • 上一篇    

轴对称挤压过程中速度和温度关系的计算

黄翔, 廖文和, 周儒荣   

  1. 南京航空航天大学
  • 收稿日期:1996-10-17 修回日期:1997-01-19 出版日期:1998-03-31 发布日期:1998-03-31
  • 作者简介:黄翔:博士后,南京航空航天大学机电工程学院,南京 210016

Calculation of the Speed -Temperature Relationship in Axisymmetric Extrusion Process

HUANG XIANG, LIAO WENHE, ZHOU RURONG   

  1. Department of Mechanical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
  • Received:1996-10-17 Revised:1997-01-19 Online:1998-03-31 Published:1998-03-31

PDF

60

被引次数

2

摘要： 建立了轴对称挤压过程热平衡的有限差分模型,在该模型中采用了动可容球形速度场,综合考虑了塑性变形、摩擦、热传导以及材料流动等引起的挤压温升.利用该模型分析了等速挤压的温度变化、模拟等温挤压和等温挤压的速度、温度的变化关系.其结果与实验数据相符,可用于热挤压工艺参数的优化设计.

关键词: 挤压, 温度, 速度, 有限差分法

Abstract: A finite difference model of heat balance in axisymmetric extrusion process is constructed. In this model, a kinematically admissible velocity field is adapted and a rise in temperature is calculated by considering the heat generation due to deformation and friction, heat transfer and material flow, etc. Using this model, not only the rise in temperature during constant speed -extrusion process is calculated, but also the profile of ram speed temperature for simulant constant exit temperature extrusion and constant temperature extrusion under a specified exit temperature is calculated. The results are well in agreement with those of the experiments. The model can be used to optimize process parameters of hot extrusion.

Key words: extrusion, velocity, temperature, finite difference method