Title:
WELDING METHOD FOR STEEL FRAMES
Document Type and Number:
Japanese Patent JP3270946
Kind Code:
B2
Abstract:
PURPOSE: To reduce the residual quantity of magnetism on steel frames at the time of electric welding by arranging welding guns at the welding positions, providing ground electrodes freely movably on steel-frame beams and connecting both to a welding power source.
CONSTITUTION: Beam fixing parts 1a are formed on steel-frame pillars 1. The steel-frame beams 2 of wide flange shape steel are fixed by bolts 3 between the beam fixing parts 1a and coupling parts between the steel-frame pillars 1 and the steel-frame beam 2 are welded together. The welding guns 5 are arranged at welding places. Ground side movable electrode parts 6 are arranged freely-movable at the steel-frame beams 2. The welding guns 5 and the ground side movable electrode parts 6 are connected to the DC welding power source of a stud welding machine 7. Consequently, a welding current can be prevented from flowing repeatedly locally by moving the ground side movable electrode parts 6 and changing the positions of the ground electrodes 15 at the time of performing electric welding.
Inventors:
Toshiyuki Ishikawa
Takeshi Takahashi
Yoshiharu Yana
Takeshi Takahashi
Yoshiharu Yana
Application Number:
JP11311793A
Publication Date:
April 02, 2002
Filing Date:
May 14, 1993
Export Citation:
Assignee:
Shimizu Construction Co., Ltd.
International Classes:
B23K9/00; B23K9/08; B23K9/20; B23K9/32; (IPC1-7): B23K9/20; B23K9/00; B23K9/08; B23K9/32
Domestic Patent References:
| JP5208278A | ||||
| JP5139626A | ||||
| JP5717503Y2 | ||||
| JP249644Y2 | ||||
| JP4422826Y1 | ||||
| JP5918815Y2 |
Attorney, Agent or Firm:
Yoshinori Yanagita (8 outside)