脉冲MIG焊熔滴过渡光谱控制法的研究

在有关电弧光谱信息研究的基础上，提出并成功地实现了脉冲MIG焊熔滴过渡的光谱控制法。它是一种物理状态控制法。试验表明：当峰值电流、基值电流、脉冲频率等焊接参数改变时，本方法均能保 持熔滴过渡为1峰0基的过渡。它具有精确控制熔滴过渡的能力，能更好地得到稳定的焊接过程和焊接质量。它还具 有抗干扰能力强、工艺适应性好、在线调节方便等一系列优点，并可期望用于2峰0基、3峰0基等的控制中，有很大的 发展潜力，为脉冲MIG焊过程和质量的自动控制提供了一个崭新的方法，是电弧光谱信息应用的新的重要发展。 试验还表明，光谱峰后切换法是实现1峰0基的最佳控制策略。论述了该方法的控制系统、原理、控制策略、焊接参数、 试验结果与分析等。

RESEARCH ON THE SPECTRAL CONTROL METHOD OF DROPLET TRANSFER IN PULSED MIG WELDING

On the basis of the study on arc spectral information of droplet transfer in pulsed MIG welding, the spectral control method of droplet transfer in pulsed MIG welding is put forward and realized successfully. Experiments show that droplet transfer keep all to one-peak-zero-base type under controlling by this method as the welding parameter varies, such as peak current, base current and pulse frequency. This method has strong capability to precisely . control droplet transfer and therefore it is very beneficial to making stable welding process and superior welding quality. It has also many other advantages, such as the strong interference-resistance, the wide technology scope and the convenient on-line adjusting property etc. In addition, this method is expected to be used to control droplet transfer of two-peak-zero-base, three-peak-zero-base and so on. Thus, a novel method is found for the automatic control of welding process and welding quality in puled MIG welding Experiments also show that the converting method at the back of the spectrum peak is the optimum control tactics. The control system, principle, control tactics, welding parameters, experimental result and its analysis of this method are discussed