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介绍了分形理论,探讨了其在电阻点焊中的应用前景。分形理论包括分形的基本概念、分形理论的发展、3个分形维 数的概念 及计算。分形在点焊中的应用包括电极间接触电阻的确定、熔核形成过程中的相变及搅拌运动、点焊中特征信号的提取。
The fractal theory is introduced and its application prospect in resistance spot welding is discussed. Fractal theory includes the basic concepts of fractal, the development of fractal theory, the concept and calculation of three fractal dimensions. The applications of fractal in spot welding include the determination of the contact resistance between electrodes, the phase transition and stirring movement in the formation of nugget, and the extraction of characteristic signals in spot welding.