聚乙烯管道电熔焊接的温度场模型

Modeling of Temperature Field in Electrofusion Joint for Polyethylene Pipes

关键词:  聚乙烯管道  电熔焊接  温度场  有限差分

Key words:  polyethylene pipe  electrofusion joining  temperature field  finite different

摘要:

聚乙烯管道焊接过程中,温度场的分布对焊接的质量有重要影响。本文在分析了聚乙烯管道电熔焊接过程的基础上,提出了焊接过程中热量传输的数学模型,采用完全隐式差分方法对电熔焊接过程中的瞬态温度场进行了数值模拟,并利用热电耦温度自动采集系统对焊接时的温度场变化进行了实时自动检测。通过实际测量值和模型预测值的比较表明,所建立的数学模型是合理的,计算结果与实际测试结果基本吻合,这一模型的提出有助于焊接质量的保证和焊接过程自动化的实现。

Abstract:

The distribution of temperature field has an important influence on the quality of welding of PE pipes.In this paper,the implicit finite different method is used for numerical simulation of transient temperature field in electrofusion joint for HDPE(High Density Polyethylene) pipes on the basis of the analysis on eletrofusion for PE pipes.The temperature distribution in pipes during electrofusion joining process is automatically measured with computer aided measuring system.The results show that the good agreement between the computer model and the measured temperature is obtained.So,the mathematical model founded is helpful to determine correct welding specification and to automate the electrofusion joining process.