WELDING QUALITY EVALUATING METHOD, WELDING METHOD, WELDING QUALITY EVALUATING DEVICE, AND WELDING QUALITY-EVALUATING ELEMENT

摘要

PPROBLEM TO BE SOLVED: To easily and correctly evaluate the welding quality at low cost. PSOLUTION: A welding quality evaluation device 1 includes a welding quality evaluating element g to be installed at a predetermined position on a surface of a member W2 to be welded, a CCD camera K as a detection means for detecting the welding quality evaluating element g, and an evaluation means PC which determines the softening or the melting of the element by recognizing the welding quality evaluating element g detected by the CCD camera K, and evaluates the welding quality based on the result of determination. The welding quality evaluating element g is formed of a low melting point material which is softened or melted at the predetermined temperature lower than the melting point of the members W1, W2 to be welded, and constituted so that its appearance is changed when the temperature reaches the predetermined value. The element is installed on the surface of the member W2 at least one of the position of a part M at which the temperature is raised to the value for changing the appearance when the normal welding is executed and the position at which the temperature is maintained at the value for not changing the appearance. PCOPYRIGHT: (C)2010,JPO&INPIT