Method of controlling the length of corrugated fins

Details Method of controlling the length of corrugated fins Method of controlling the length of corrugated fins

1991-12-06

1993-05-04

Crane, Daniel C.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72185, B21D 1304

Patent

active

052070832

ABSTRACT:
A center machine for producing corrugated fins for heat exchangers has servomotor driven pullout rolls for stretching a compressed corrugated strip to desired fin density and normally driven in phase with corrugation forming rolls. A cutoff knife severs parts from the strip and a sensor measures the length of each part. A control determines part length error, calculates servomotor speed adjustment needed to nearly correct the error and causes such a speed adjustment for a short period to alter the phase of the pullout rolls relative to the forming rolls.

REFERENCES:
patent: 4507948 (1985-04-01), Wallis
patent: 4685318 (1987-08-01), Ueda et al.
patent: 4838065 (1989-06-01), Wallis
patent: 4953378 (1990-09-01), Wallis
patent: 5007270 (1991-04-01), Wallis

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