Magneto-repulsion punching with dynamic damping

Details Magneto-repulsion punching with dynamic damping Magneto-repulsion punching with dynamic damping

1995-06-07

1998-03-10

Rada, Rinaldi I.

Electricity: measuring and testing

Magnetic

Displacement

32420726, 32420722, 83575, G01B 700

Patent

active

057265682

ABSTRACT:
Dimpling of a workpiece by rebounding of a magnetic repulsion punch mechanism, when operated at high punching rates, is avoided by application of a damping pulse at a point at or subsequent to a mid-point of a return stroke of the punch from the workpiece and preferably within the last 10% of the return stroke. This damping pulse is preferably a fraction of the pulse width and of approximately the same amplitude as a driving pulse applying kinetic energy to the punch for causing punching of the workpiece. At high punching rates the kinetic energy of the return portion of a punching stroke is substantially determined by elastic rebounding of the punch from a guide bushing. The removal of kinetic energy during the return portion of the stroke allows the return of the punch to a position close to a rest position during a very short interval with small overshoot under control of mechanical damping. Since dynamic damping may be substituted for much of the mechanical damping in the punching arrangement, high quality punching may be accomplished at much increased punching rates. A preferred form of monitoring punch position employs RF reflected inductance and may be used to form a time expanded image of punch movement.

REFERENCES:
patent: 2825406 (1958-03-01), Hagopian
patent: 3602806 (1971-08-01), Czekajewski
patent: 3611138 (1971-10-01), Winebrener
patent: 3678847 (1972-07-01), Pear, Jr. et al.
patent: 3695130 (1972-10-01), Fedrigo
patent: 3730039 (1973-05-01), Fedrigo
patent: 3867675 (1975-02-01), Kitz et al.
patent: 4001687 (1977-01-01), Sorkin et al.
patent: 4068189 (1978-01-01), Wilson
patent: 4121155 (1978-10-01), Chamuel
patent: 4333052 (1982-06-01), Schmall
patent: 4333398 (1982-06-01), Carson, Jr. et al.
patent: 4348119 (1982-09-01), Carson, Jr. et al.
patent: 4353656 (1982-10-01), Sohl et al.
patent: 4395665 (1983-07-01), Buchas
patent: 4429342 (1984-01-01), Heider
patent: 4522122 (1985-06-01), Mazumder
patent: 4538930 (1985-09-01), Dunfield
patent: 4543527 (1985-09-01), Schuchmann et al.
patent: 4547087 (1985-10-01), Heider et al.
patent: 4553074 (1985-11-01), Jacquemet
patent: 4569607 (1986-02-01), Takemoto
patent: 4599007 (1986-07-01), Khorsand
patent: 4618822 (1986-10-01), Hansen
patent: 4703644 (1987-11-01), Waldner
patent: 4744684 (1988-05-01), Maekawa
patent: 4821614 (1989-04-01), Fleet et al.
patent: 4850724 (1989-07-01), Fattori
patent: 4857919 (1989-08-01), Braswell
patent: 4862043 (1989-08-01), Zieve
patent: 4871271 (1989-10-01), Watanabe et al.
patent: 4872381 (1989-10-01), Stroms
patent: 4880322 (1989-11-01), Jensen et al.
patent: 4990805 (1991-02-01), Zieve
patent: 5003260 (1991-03-01), Auchterlonie
patent: 5010298 (1991-04-01), Uemura
patent: 5019782 (1991-05-01), Schatter
patent: 5159253 (1992-10-01), Shimizu et al.
patent: 5222012 (1993-06-01), Frankeny et al.
patent: 5291782 (1994-03-01), Taylor
patent: 5404101 (1995-04-01), Logue
patent: 5410233 (1995-04-01), Carbaug, Jr. et al.
patent: 5453871 (1995-09-01), Kolner et al.
patent: 5467082 (1995-11-01), Sanderson
patent: 5479172 (1995-12-01), Smith et al.
"Magneto Repulsion Punch Drive Circuit"; IBM Technical Disclosure Bulletin; vol. 31, No. 7, Dec. 1988; pp. 423-424.
"Flexpunch Machine"; IBM Technical Disclosure Bulletin; vol. 31, No. 9, Feb. 1989; pp. 140-141.
"Punch Design for Magnetic Punch"; IBM Technical Disclosure Bulletin; vol. 32, No. 58, Oct. 1989; pp. 205-206.

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