等效电阻模糊熵双丝PMIG焊稳定性评价方法

发布时间：2018-03-07 11:18

本文选题：铝合金　切入点：双丝焊　出处：《焊接学报》2017年09期 　论文类型：期刊论文

【摘要】：文中将基于模糊隶属度函数的模糊熵应用于铝合金双丝PMIG(pulse metal inert gas,PMIG)焊接过程稳定性和质量的评价,提出焊接电弧等效电阻模糊熵的概念.模糊熵具有对数据长度和相似容限r值的依赖性小、相对一致性好、抗噪性强等特点,适用于存在强干扰的焊接过程参数分析.采用相同的电流电压参数改变其它条件对3A21铝合金进行了一系列双丝PMIG焊接试验研究,并计算其等效电阻模糊熵值.结果表明,焊接过程越不稳定等效电阻的模糊熵值越大,且对稳定性的区分度较大,为铝合金双丝PMIG焊接过程稳定性和质量评价提供了新的方法.
[Abstract]:In this paper, fuzzy entropy based on fuzzy membership function is applied to evaluate the stability and quality of aluminum alloy double-wire PMIG(pulse metal inert gas mix welding process. The concept of equivalent resistance fuzzy entropy of welding arc is put forward. The fuzzy entropy has the characteristics of little dependence on data length and similar tolerance r value, good relative consistency, strong noise resistance, etc. It is suitable for the analysis of welding process parameters with strong interference. A series of double-wire PMIG welding experiments were carried out on 3A21 aluminum alloy by changing other conditions with the same current and voltage parameters, and its equivalent resistance fuzzy entropy value was calculated. The results show that, The fuzzy entropy value of the unstable equivalent resistance in the welding process is larger, and the stability is more distinguished, which provides a new method for evaluating the stability and quality of aluminum alloy double-wire PMIG welding process.
【作者单位】：南京理工大学材料科学与工程学院;
【基金】：国防科工局技术基础科研项目(JSCG2017606B005)
【分类号】：TG457.14

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