AN APPARATUS AND METHOD OF ESTIMATING WELDING QUALITY BY DETECTING WIDTH OF THE HEAT EFFECTIVE REGION IN A FLASH BUTT WELDING DEVICE

摘要

Flash butt welded quality judging device, and the welding quality determination method of a welding machine according to the invention to calculate the flexural strength of the welding portion on the basis of the relationship between the calculated heat affected zone width of the flash butt welded coil and the heat affected zone of the width and the bending strength . If the calculated flexural strength is compared with the bending strength of the set size is determined to be good welding quality is greater than the set value and smaller it is determined that the poor weld quality.