| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for feeding a welding bolt when the welding bolt having a screw part below a head part of the welding bolt of the dimension shorter than the diameter of the head part, the so-called short underhead bolt is automatically fed to the welding position of a resistance spot welding machine from a parts feeder by air blowing. SOLUTION: A jaw of a feed unit is advanced/retracted, a short welding bolt held in a parts containing part of the jaw is fed to a panel work positioned by inserting a guide pin of a lower electrode, and the welding bolt is joined by being held between an upper electrode and the lower electrode. In that case, the welding bolt fed at the retracted position of the jaw through a feed pipe from a parts feeder is posture-changed to the normal direction immediately above the retracted jaw, and the welding bolt in the normal posture is pushed out into the parts containing part of the jaw. The welding bolt which is moved by advancing the jaw is fed on the same axis as the guide pin, the guide pin is elevated from the lower electrode to face the guide pin to the welding bolt, and the welding bolt is pushed into a welding positioning hole in the panel work by the pressurizing motion of the upper electrode from a part immediately above the jaw. COPYRIGHT: (C)2005,JPO&NCIPI
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