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传统的闪光焊动板控制是以给定速度持续送进为基础的,这种方法不考虑触点的瞬时变化,因而在改进闪光过程和提高加热效率方面有着明显的局限性。本文提出了一种闪光焊动板瞬时控制原理,即按照闪光时触点的产生与烧化过程对动板进行瞬时调节。这种控制方法可以根据要求改变触点的烧化过程,从而降低激发闪光所需的电压,提高闪光加热效率。对动板进行瞬时调节,还可以实现动板宏观速度自适应于工件烧化速度的变化,自动形成具有类似指数函数形式的动板位移曲线。本瞬时控制法在常规通用焊机上的应用试验表明:闪光过程稳定,焊接质量良好,可以降低比功率到十分之一。
Conventional flare pad control is based on continuous feed at a given speed, and does not account for the instantaneous changes in contact, and therefore has significant limitations in improving the flash process and increasing heating efficiency. In this paper, an instantaneous control principle of flash welding plate is proposed, that is, the instantaneous adjustment of the movable plate is carried out according to the generation of the flash and the burning process. This control method can be changed according to the requirements of the contact burning process, thereby reducing the voltage required to stimulate the flash, improve flash heating efficiency. The instantaneous adjustment of the moving plate can also realize the change of the macroscopic speed of the moving plate adaptive to the burning rate of the workpiece and automatically form the moving plate displacement curve with the similar exponential function. The instantaneous control method in the conventional common welder application tests show that: the flash process is stable, the welding quality is good, can reduce the specific power to one-tenth.