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AssigneeSiemens Vai Metals Technologies GmbH
InventorsDominique Polatidis, Yves Leclercq
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The invention concerns a method and a device for controlling the overlapping of levelling rollers in a planishing machine comprising two levelling trains each bearing a series of rollers (4, 4′) with parallel axes. The invention is 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 (3, 3′) regulating the roller overlap to maintain the value of the thus determined torque at the reference value (Refc). The inventive device (103) for regulating the roller overlap for implementing the method is characterized in that it comprises a circuit (105) for regulating the speed of the rollers and a circuit (104) for regulating the overlap acting on the position of the rollers.
1-15. (canceled)
Method to level a flat product in strip or sheet form in a levelling machine of the type comprising a fixed support stand, two sets of levelling equipment with levelling parallel rolls respectively positioned above and below said strip or sheet, devices for adjusting the intermesh of the rolls, motorization means for the levelling rolls, means for at least global measurement of torques transmitted to the levelling rolls by the motorization means, a theoretical model or pre-adjustment device giving at least one velocity reference value for the motorization means of the levelling rolls and for the electric torque value required for plastic deformation of the product, said method comprising the steps of measuring at least the global value of the torques transmitted to the levelling rolls and determining the actual value of the torques used for plastic deformation of the product, comprising the determined actual value with the torque reference value given by the pre-adjustment model, and exerting action 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.
An adjustment device to adjust an intermesh of rolls in a machine to level flat products in strip or sheet form, said machine comprising a fixed support stand, two sets of levelling equipment with parallel levelling rolls, respectively positioned above and below the strip, 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, a theoretical model or pre-adjustment device giving at least one reference velocity value for the motorization means of the levelling rolls and for the value of the electric torque required for plastic deformation of the product, said adjustment device comprising means for determining the actual value of the torques used for plastic deformation of the products, a roll velocity adjustment circuit allowing servo-control by the reference velocity value given by the model, and a roll intermesh adjustment circuit acting on a position of the rolls by adjusting a difference between the reference torque required for plastic deformation of the product given by the model and measurement taken on the rolls.
Dependencies are inferred from the claim text.