Welding gun and methods conducted using the same
First Claim
1. A welding gun comprising:
- a moving side portion including a moving side welding tip and a driving device for driving said moving side welding tip; and
a fixed side portion including a fixed side welding tip and an arm supporting said fixed side welding tip, wherein a fixed side sensor for detecting at least one of a position of said fixed side welding tip and a pressing force imposed on said fixed side welding tip is provided in said fixed side portion.
1 Assignment
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Accused Products
Abstract
An intelligent welding gun is provided with a fixed side sensor in a fixed side portion. The mechanical impedance of the fixed side portion is kept small, which permits the mechanical impedance to be set in a range where the fixed side sensor can effectively detect at least one of a position of a fixed side welding tip and a pressing force imposed on the fixed side welding tip. The fixed side sensor and a moving side sensor constitute a redundant sensor measurement system. Various kinds of methods conducted using the above welding gun include a method of calibrating a sensor (including calibration of a reference point and a gain), a control method of suppressing a welding expulsion, a re-welding feedback control method, a control method of a welding strength, a control method of reducing a clearance between workpieces, a method of correcting a welding robot track, and a method of managing a positional accuracy change at a welding point.
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Citations
4 Claims
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1. A welding gun comprising:
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a moving side portion including a moving side welding tip and a driving device for driving said moving side welding tip; and
a fixed side portion including a fixed side welding tip and an arm supporting said fixed side welding tip, wherein a fixed side sensor for detecting at least one of a position of said fixed side welding tip and a pressing force imposed on said fixed side welding tip is provided in said fixed side portion. - View Dependent Claims (2, 3, 4)
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Specification