Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element
Patent
1992-12-03
1993-10-26
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
72 20, 72 21, 72165, 72202, B21D 102
Patent
active
052555488
ABSTRACT:
A method of levelling metal plate in a leveller having at least three vertically opposed sets of driven and backed-up upper and lower work rolls mounted in at least three upper roll frames and a lower roll frame, each of the upper roll frames being adjustably movable with respect to the lower roll frame in a vertical direction and tiltable in a direction of a pass line of plate passed through the leveller to vary a gap between the upper and lower work rolls, said method comprising (a) measuring the temperature of the plate prior to its entry into the leveller and the time at which such temperature measurement is made; (b) measuring the actual thickness of the plate and the corresponding roll separating force; (c) inputting into a computer the plate physical data, the roll diameter, rolling speed, and the data of steps (a) and (b), and calculating the variance of such measured plate temperature from the furnace soak temperature and the variance of such actual plate thickness from an expected plate thickness; (d) using the computer, with the aid of the aforesaid data input, to calculate roll gap settings necessary to provide bending of the plate such that, in each work roll set, at least fifty percent of the plate thickness section is stressed to the yield point of the metal; (e) transmitting the calculated roll gap settings to means to vertically and tiltably adjust the upper work roll frames to provide corresponding adjusted work roll gaps, and (f) levelling the plate by passing the plate successively through the adjusted work roll gaps.
REFERENCES:
patent: 2945530 (1960-07-01), Maust
patent: 3927545 (1975-12-01), Morooka
patent: 4633697 (1987-01-01), Blough
patent: 4730472 (1988-03-01), Ellis
Crane Daniel C.
Mesta International
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