PURPOSE: To improve mechanical properties with the fined metallic texture of a weld bead and to assure the build-up thickness of the weld bead easily by compressing the fluid weld bead formed successively according to propression of welding with a pressurizing roll thereby smoothing the bead.
CONSTITUTION: A welding rod A and a pressurizing device 1 so as to be located behind the welding rod in the advance direction are first disposed in the welding position. While the rod A is melted by an arc or gas, the rod is moved leftward and the build-up welding of a butt part 3 is executed. The weld bead B formed successively during this time is compressed in the state of the molten bead C prior to solidifying with a pressurizing roll 5 which is operated so as to follow up the rod A. The metallic texture of the compressed bead C is fined in a compression stage and the surface of the bead is formed smooth. The bead is solified by a heat radiating effect. As a result, the metallic texture of the bead B is made fine and uniform, and the mechanical properties thereof are improved. Since the surface of the bead B is smoothed, the thickness of building- up is made constant, and the assurance of the constant thickness is made easy.
ABE NOBUKAZU
TAKAHASHI TAKAO
HASHIMOTO KAZUHIKO
SHINOHARA YASUO
