Analysis of flash butt welding process of bimetal band saw blade

LI Yuanbo; WU Decheng; LIU Guoyue; YUAN Tian; CAO Yang

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Analysis of flash butt welding process of bimetal band saw blade
Vol. 48, Issue 8, Pages: 73-78(2018)
Published：2018
DOI：
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DOI：

LI Yuanbo, WU Decheng, LIU Guoyue, et al. Analysis of flash butt welding process of bimetal band saw blade[J]. Eletric Welding Machine2018, 48(8): 73-78. DOI：

摘要

为了研究双金属带锯条闪光对焊过程

对焊接机构凸轮及移动焊台的运动过程进行分析。针对闪光对焊不同阶段将凸轮划分为不同等分

分析凸轮半径变化带动焊接电极运动的过程。焊接电极运动至顶锻位置时

凸轮位移发生突变获得较大加速度

分析速度变化量以及焊缝形成过程。对焊接时的电参数进行采样

测得焊接电流和电压波形

并分析其变化规律。结合焊接电极运动变化

得出带锯条焊缝烧蚀速度与夹具进给速度的关系:当两者速度相一致时

出现连续闪光现象

获得较好的焊接质量。

Abstract

In order to study the flash butt welding process of the bimetal band saw blade

the movement process of the cam and movable welding platen of the welding mechanism are analyzed. For the different stages of flash butt welding

the cam is divided into different parts

and the change of cam radius driving the movement process of welding electrodes are analyzed. When the welding electrode moves to the upsetting position

the cam displacement mutation obtains the big acceleration

the velocity variable quantity and weld forming process are analyzed. Then

the electrical parameters of welding are sampled

the welding current and voltage waveform are measured

and their change rules are analyzed. Finally

the relationship between the ablation speed of the band saw blade weld and the feed speed of the fixture is obtained combining with the change of the welding electrode movement:When the speeds of these two are consistent

the continuous flash phenomenon appears and the welding quality is better.