Mitsubishi Heavy Industries Limited

Primetals Technologies Japan, Ltd.

Satoru Zenitani

Yukio Manabe

Yoshinori Hiromoto

Yasuyuki Kobayashi

Shuho Tsubota

Yasuyuki Fujiya

Yujiro Watanabe

Kazuhiko Kamo

Mitsuru Onose

Shinichi Kaga

Takehiko Saito

Yasutsugu Yoshimura

Noriaki Tominaga

Naoki Yamasaki

Hirokazu Kadowaki

Naoki Suda

Hirotoshi Tagata

Yasutaka Banno

Ikuo Wakamoto

A weldment manufacturing method includes drilling that forms a hole on a workpiece, feeding a filler material to the hole and putting the filler material on a bottom of the hole, and melting the filler material by emitting a laser beam to the hole while scanning with the laser beam, so as to fill the hole with the melted filler material. By repeating the feeding and the melting, a weld repairing portion filling the hole is formed.

Weldment manufacturing method, weldment manufacturing system, and weldment

A pair of upper and lower pressure rollersis disposed so that their axesare tilted in a horizontal plane in respective directions opposite to each other with respect to a straight line perpendicular to a welding line of a joint portion J. The pressure rollersare positively driven by corresponding electric motorsto thereby roll the joint portion. Thus, steps defined at the joint portion can be smoothed and a step gradient can be reduced to ensure a high degree of joint strength. Thus, it is possible to prevent a step portion from being interfolded into the base material of the meal plates

Metal plate joining method and apparatus

A clad welding method, which can prevent the occurrence of incomplete fusion, and can cover the surface of a base material over a wide range with a weld metal, while suppressing the dilution of the weld metal, by use of a relatively simple technique, is provided. For this purpose, a welding heat input is increased at a location where one end () of a preceding weld bead () and the other end () of a succeeding weld bead () overlap, as compared with a welding heat input at a location where the preceding weld bead () and the succeeding weld bead () do not overlap, to produce a deep penetration portion () involving locally deep penetration ().

Clad welding method

Method of welding in the horizontal position and welding apparatus

The object of this invention is to prevent a defect which occurs in overhead or vertical welding when gravity causes molten metal to drip downward so that the top of the gap has an undercut and the bead has a bulge along the weld line (i.e., a convex bead is created). During overhead or vertical welding, a unidirectional current is made to flow in the molten pool in the direction of the weld line. When the aforesaid current flows in conjunction with a magnetic field, a Lorentz force is exerted in the molten pool in an upward direction towards the upper top side of the groove. This prevents the molten metal from dripping downward and improves the shape of the bead.

Welding method in the overhead and vertical positions

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Hiroshima, Japan

Satoru Zenitani