US 8,127,580 B2Granted

Method for levelling a flat product in strip or sheet form in a levelling machine with intermeshed rolls and levelling installation therefore

AssigneeSiemens Vai Metals Technologies GmbH

InventorsDominique Polatidis, Yves Leclercq

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Abstract

A method and a device is provided for controlling the overlapping of leveling rollers in a planishing machine comprising two leveling trains each bearing a series of rollers with parallel axes. The method and device are particularly applicable to sheets and strip products of great thickness and high hardness requiring little roller overlap. The method is characterized in that it consists in measuring at least the overall value of the torques transmitted to the planishing rollers by the motors, in determining the actual value of the torques used for planishing the product, in comparing the determined value with the reference value of the torque provided by the presetting model and in acting on the members regulating the roller overlap to maintain the value of the thus determined torque at the reference value.

Claims15

Dependent claims

A method for levelling a flat product in strip or sheet form in a levelling machine, the method comprising the following steps:

providing a fixed support stand,
providing two levelling trains with parallel rollers respectively positioned above and below said strip or sheet,
providing devices for adjusting an intermesh of the rolls,
providing motorization means for transmitting torques to the levelling rolls,
providing means for at least global measurement of the torques transmitted to the levelling rolls by the motorization means,
providing a pre-adjustment device giving at least one velocity reference value for the motorization means of the levelling rolls and for an electric torque value required for plastic deformation of the product,
measuring at least the global value of the torques transmitted to the levelling rolls,
determining a real value of the torques used for plastic deformation of the product,
comparing the determined real value with the torque reference value given by the pre-adjustment model, and
acting on the adjusting devices to adjust the intermesh of the levelling rolls to maintain the determined torque value used for plastic deformation of the product equal to the reference value given by the model.

7 more elements

In a machine for leveling flat products in strip or sheet form including a fixed support stand, two leveling trains with parallel rollers, devices for adjusting roll intermesh, motorization means for the levelling rolls, means for at least global measurement of torques transmitted to the levelling rolls by the motorization means, and a pre-adjustment device giving at least one reference velocity value for the motorization means of the levelling rolls and for a value of an electric torque required for plastic deformation of the product,

an adjustment device for adjusting an intermesh of the rolls in the machine, the adjustment device comprising:
means for determining a real value of the torques used for plastic deformation of the products,
a roll velocity adjustment circuit connected to the pre-adjustment device and allowing a servo-control by the reference velocity value given by the model, and
a roll intermesh adjustment circuit connected to the roll velocity adjustment circuit and acting on a position of the rolls by adjusting a difference between a reference torque required for plastic deformation of the product given by the model and a measurement taken on the rolls.

1 more element

Dependencies are inferred from the claim text.