Machining method of welding ear plate on barrel of central cylinder of horizontal preheater

Abstract

The invention discloses a machining method of welding an ear plate on a barrel of a central cylinder of a horizontal preheater. The machining method comprises step 1, designing a set of process equipment comprising welding guide brackets, a roller carrier and iron piers; step 2, drawing an assembly line of the ear plate on the barrel of the central cylinder; step 3, drawing a position line of the ear plate on a working platform and placing the ear plate on the central cylinder for spot welding; step 4, installing the welding guide brackets on the central cylinder, hoisting the welding guide brackets and the central cylinder together to the roller carrier, and placing the roller carrier on the iron piers to allow both ends of the central cylinder to be basically coaxial; step 5, placing temporary fixed flat steel on both ends of the ear plate and placing a run on plate and a blowout plate; step 6, symmetrically welding both sides of the ear plate on the central cylinder; step 7, removing the temporary fixed flat steel, the run on plate and the blowout plate, batch grinding welds and burrs; and step 8, hoisting the roller carrier and removing the welding guide brackets after the welds are proved conforming by ultrasonic examination. The horizontally welding method of the invention can substantially improve welding quality and reduce labor intensity of operators.