Control circuit for a multi-blow forming process

Details Control circuit for a multi-blow forming process Control circuit for a multi-blow forming process

1983-02-22

1985-11-19

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

340680, 7386253, G08B 2100

Patent

active

045545340

ABSTRACT:
A load sensor generates a signal representing the amount of force applied to a workpiece during each blow of a multi-blow forming process. In a two blow process, a first amplifier is connected to the load sensor for amplifying the load sensor signals representing both blows in the forming process. A first gain control circuit is connected to the first amplifier for adjusting the amount of amplification to a first predetermined level. A logic control circuit is connected to the first amplifier for generating a first enabling signal during the first blow in the forming process and a second enabling signal during the second blow in the forming process. A second amplifier is connected to the first amplifier for amplifying the load sensor signals representing only the first blows in the forming process. A second gain control circuit is connected to the second amplifier for adjusting the amount of amplification to a second predetermined level. Circuits responsive to the signals generated by the first and second amplifiers and to the first and second enable signals are provided to measure the forces applied to the workpiece during each blow of the forming process.

REFERENCES:
patent: 3541445 (1970-11-01), Taylor et al.
patent: 3826902 (1974-07-01), Claxton et al.
patent: 3827253 (1974-08-01), Mori
patent: 3872386 (1975-03-01), Luhowy
patent: 4023044 (1977-05-01), Miller et al.
patent: 4078233 (1978-03-01), Frye
patent: 4109213 (1978-08-01), Holley et al.
patent: 4274282 (1981-06-01), Budraitis et al.
patent: 4461182 (1984-07-01), Jones, Jr. et al.

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