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本文认为闪光焊的基本特点是闪光过程的不连续性,动板运动必须适应这一不连续性,也就是应与触点的瞬时过程相一致,才能达到闪光稳定,提高加热效率的目的。文章对闪光的不连续性进行了分析,并提出了以触点实际过程为基础的实时调节方案。根据这一方案设计了相应的闭环电液伺服控制系统,这一系统的试验结果表明,闪光过程的稳定性大为提高,实现了动板宏观送进自动适应工件烧化速度的增长,焊机不再需要凸轮等给定送进曲线装置。由于加热效率大幅度提高,闪光比功率比常规送进法降低达十倍,已经用这一方法为工厂成批生产了刀具,使用情况良好。
In this paper, the basic characteristic of flash welding is the discontinuity of the flash process. The moving board motion must adapt to this discontinuity, that is, it should be consistent with the instantaneous process of the contacts to achieve the stable flash and increase the heating efficiency. The paper analyzes the discontinuity of flash and proposes a real-time adjustment scheme based on the actual contact process. The corresponding closed-loop electro-hydraulic servo control system is designed according to the scheme. The experimental results of this system show that the stability of the flash process is greatly improved, and the macro feed of the moving plate is automatically adapted to the increase of the burning rate of the workpiece. Then need to set the cam and other devices into the curve. Due to the dramatic increase in heating efficiency, the flash power has been reduced by a factor of ten over the conventional feed method, which has been used in mass production of the tool for the factory in good condition.