Is the crane telescopic arm welded by channel steel or by square tube?
Steel welding steel mostly used as a beam or a column, the steel plate is relatively thick, and the channel has been forming calculation immunity anti disturbance capability is greatly improved, two only in the center position of weld line position, the formation of the moment theory on the bending of the analysis should be small and therefore, whether it is welding crack or welding deformation can better handle. In no case have to supply square, to be.
Check the size and straightness of the whole workpiece and make the necessary correction according to the inspection (slightly larger factories have correction equipment).
Such as the formation of the square tube is welded with working under the state of stress, should do NDT inspection, such as ultrasonic or X optical inspection can weld the assessment standard (within the weld porosity, slag, cracks and other defects of the quantity, size etc.) according to routine;
1, weld appearance inspection: acceptance criteria recommended by conventional, such as the surface should be flat and uniform, to strengthen the high requirements, welding rod in accordance with design requirements, without biting edges and other defects;
