Device and method for manufacturing welded shaped steel

A welded shaped steel manufacturing device for weld-connecting a butt portion of a web member having an end butting perpendicularly against a flange member and thereafter correcting in shape the flange member subjected to thermal deformation caused by heat input during welding, the device comprising:

• a corrective device including
• flange-member correcting rollers arranged for respective ends of the flange member, each configured to press each end on a web-member side of the flange member so as to correct the thermal deformation over a range of the flange member from each end thereof to the butt portion thereof against the web member,
• flange-member correcting roller positioning machines capable of adjusting positions of the respective flange-member correcting rollers in a direction from a weld-connected portion toward an end of the flange member weld-connected to the web member, along a surface of the flange member between the weld-connected portion and the end,
• and
• web-member supporting rollers configured to support a web surface of the web member, wherein
• the flange-member correcting rollers arranged for the respective ends of the flange member apply independent pressures to the respective ends so as to correct the thermal deformation, and wherein
• each of the flange-member correcting rollers has a conical surface, whose rotational axis is along a direction perpendicular to the surface of the flange member before being subjected to thermal deformation, to press each end of the flange member.