Research on the Extraction of Controlling factors in the Resistance Spot Welding Using Pressure Change due to Nugget formation.

在电阻点焊过程中，直接提取控制因素，建立良好的质量和稳定的熔核进行了研究。高压产生和它的冶金效果，即溶质元素的大偏析直接法显示。利用这种压力变化通过电极，研制了一台微机控制的带反馈系统的电阻点焊机，并进行了实验研究，通过对铝、铁、黄铜、不锈钢等金属板试件的实验研究表明，监测和反馈给计算机的控制因素不仅是压力变化，而且还有微膨胀，而且需要对微膨胀进行精确的测量和控制。

During resistance spot welding, direct extraction of Controlling factors for the establishment of good quality and stable nuggets was examined.High pressure generation and its metallurgical effect that was a great segregation of solute elements were shown by direct method.Using this pressure change through electrodes, a computer controlled resistance spot welding machine with feed back system was developed for this research.Experimental results obtained by the thin plate metal specimen (AI, Fe, Brass, Sus) indicated that the Controlling factors for monitoring and feeding back to computer were not only a pressure change but also a micro dilation.Furthermore, it will be necessary to measure and to control this micro dilatation precisely.