Electric heating – Metal heating – For bonding with pressure
Patent
1997-05-27
1998-09-15
Shaw, Clifford C.
Electric heating
Metal heating
For bonding with pressure
219 8641, 2191171, B23K 1124
Patent
active
058082662
ABSTRACT:
A system and method is disclosed for monitoring and controlling a resistance projection welder for welding a projection weld nut to a workpiece. A displacement sensor measures the displacement of a welding electrode of a weld gun in real time during the welding procedure. A computer is coupled to the displacement sensor and determines whether the projection weld nut is correctly loaded between the workpiece and the welding electrode. The computer instructs a programmable logic controller (PLC) to trigger a weld controller to apply power to the welding electrode if the projection weld nut is correctly loaded onto the workpiece. The computer instructs the PLC to inhibit power if it determines the projection weld nut to be inverted, missing, or misaligned in order to allow for the removal and replacement of the projection weld nut. The computer further instructs the PLC to control and terminate the power to the welding electrode in real time in order to form a projection weld between the projection weld nut and the workpiece that is substantially similar to a predetermined projection weld. The computer processes the displacement data and provides a fault signal when the projection weld is unacceptable. A marker marks the unacceptable workpieces in response to the fault signal.
REFERENCES:
patent: 3433921 (1969-03-01), Peterson
patent: 3435871 (1969-04-01), Johnson
patent: 4020316 (1977-04-01), Schaft et al.
patent: 4028522 (1977-06-01), Chihoski et al.
patent: 4296304 (1981-10-01), Defourny
patent: 4317980 (1982-03-01), Goodrich et al.
patent: 4441006 (1984-04-01), Machida et al.
patent: 4447700 (1984-05-01), Cohen
patent: 4461944 (1984-07-01), Cohen
patent: 4542277 (1985-09-01), Cecil
patent: 4609805 (1986-09-01), Tobita et al.
patent: 4684778 (1987-08-01), Cecil
patent: 4841113 (1989-06-01), Hamada et al.
patent: 4861959 (1989-08-01), Cecil
patent: 4970361 (1990-11-01), Fuse
patent: 4984171 (1991-01-01), Tsujii
patent: 5220145 (1993-06-01), Cecil et al.
patent: 5225647 (1993-07-01), Dufrenne
patent: 5248869 (1993-09-01), Debell et al.
patent: 5258598 (1993-11-01), Alborante
patent: 5288968 (1994-02-01), Cecil
patent: 5360156 (1994-11-01), Ishizaka et al.
patent: 5376766 (1994-12-01), Higgins
patent: 5393950 (1995-02-01), Killian
patent: 5632912 (1997-05-01), Cecil
Report: Controlling Resistance Welds With Deflection Feedback, by David Bacon, dated Sep. 11, 1991, 8 pages.
Copy of SAE International brochure, Analysis and Development . . . dated Feb. 25-Mar. 1, 1991, 20 pages (w/cover included).
SAE brochure, SAE Technical Paper Series, dated Feb. 24-28, 1986, 19 pages (w/cover and copyright included).
Article from "Welding Research Supplement" titled Analysis and Development . . . , by C.L. Tsai et al., dated Dec. 1991, pp. 339-s-351-s.
Article from "Welding Research Supplement" titled Modeling of Resistance . . . by C.L. Tsai et al., dated Feb. 1992, pp. 47-s-54-s.
Article from "Welding Journal" titled Control of Pinch Welding Uses . . . by A.E. Bentley, dated Jun. 1991, pp. 51-63.
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