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US 6,720,517 B2Granted
Resistance welding head and resistance welding apparatus and method using the head
AssigneeSumitomo Wiring Systems, Ltd.
InventorsShigeru Kato, Tatsuya Hattori
Life of this patent
Estimating the term…
Abstract
A resistance welding head carries out resistance welding while clamping spots are being welded by a pair of electrodes. The head is floated in a direction Y perpendicular to a direction X of juxtaposing the spots being welded. The pair of electrodes clamp the spots being welded while centering by acting a reaction force exerted when the electrodes clamp the spots to the resistance welding head. Then, resistance welding starts.
Claims20
A resistance welding head comprising:
- a pair of holding units including a pair of electrodes, said holding units being movable relative to each other in a joining direction between a welding position in which said electrodes clamp together and a releasing position in which said electrodes are spaced from each other;
- a floating guide that supports said pair of holding units for floating movement toward and away from one another in said joining direction between said welding position and said releasing position;
- and
- a driving mechanism that drives said pair of holding units in said joining direction between said welding position and said releasing position, wherein said driving mechanism is provided on a first holding unit of said pair of said holding units and is configured to drive a second holding unit of said pair of holding units.
1 more element
A method of welding using a resistance welding head, said method comprising:
- providing a pair of holding units including a pair of electrodes, said holding units being movable relative to each other in a joining direction between a welding position in which said electrodes clamp together and a releasing position in which said electrodes are spaced from each other;
- providing a floating guide that supports said pair of holding units for floating movement toward and away from one another in said joining direction between said welding position and said releasing position;
- providing a driving mechanism that drives said pair of holding units in said joining direction between said welding position and said releasing position, wherein said driving mechanism is provided on a first holding unit of said pair of said holding units and is configured to drive a second holding unit of said pair of holding units;
- and
- driving said pair of holding units in said joining direction between said welding position and said releasing position while floatably guiding said pair of holding units.
2 more elements
Dependencies are inferred from the claim text.