Method for levelling a flat product in strip or sheet form in a levelling machine with intermeshed rolls and levelling installation therefore
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21D-001/02
B21D-001/06
B21B-037/00
출원번호
US-0094185
(2006-11-15)
등록번호
US-8127580
(2012-03-06)
우선권정보
FR-05 11930 (2005-11-22)
국제출원번호
PCT/FR2006/002525
(2006-11-15)
§371/§102 date
20081007
(20081007)
국제공개번호
WO2007/060310
(2007-05-31)
발명자
/ 주소
Polatidis, Dominique
Leclercq, Yves
출원인 / 주소
Siemens VAI Metals Technologies SAS
대리인 / 주소
Greenberg, Laurence A.
인용정보
피인용 횟수 :
1인용 특허 :
8
초록▼
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
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.
대표청구항▼
1. 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 ad
1. 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, andacting 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. 2. The method for levelling a flat product in strip or sheet form in a levelling machine according to claim 1, further comprising determining the real value of the torques used for plastic deformation of the product by correcting a measurement with acceleration and deceleration torque values used during speed changes of the levelling machine. 3. The method for levelling a flat product in strip or sheet form according to claim 1, further comprising providing the levelling machine with several parts whose rolls are motorized independently in groups, each group corresponding to one of the parts of the levelling machine, each part comprising separate means for roll intermesh, a pre-adjustment device giving at least one reference velocity value for the motors of the levelling rolls and for the value of the electric value required for plastic deformation of the product in each part of the machine, measuring, in each part, at least the global value of the torques transmitted to the corresponding group of levelling rolls and determining the real value of the torques used for plastic deformation of the product in each of the parts, comparing the determined value with the reference torque value given by the pre-adjustment model for the same part of the machine, and exerting action on adjusting devices to adjust the intermesh of the levelling rolls of said part in order to maintain the torque value thus determined used for plastic deformation of the product equal to the reference value given by the model. 4. The method for levelling a flat product in strip or sheet form in a levelling machine according to claim 3, further comprising determining the real value of the torques used for plastic deformation of the product in each part of the machine by correcting the measurement with the acceleration and deceleration torque values used during speed changes of the levelling machine. 5. The method for levelling a flat product in strip or sheet form in a levelling machine according to claim 3, further comprising making by measurement or calculation a determination of a tension induced in the product by the different parts of the machine having independent motorization, and for each part inferring the real value of the torques used for plastic deformation of the product thereupon by correcting the measurement with the torque values required for tension equilibrium within the product in zones located between each part of the levelling machine. 6. The method for levelling a flat product in strip or sheet form according to claim 1, further comprising providing the levelling machine with two parts, an entry part and an exit part respectively, whose rolls are motorized independently in two groups, each said group corresponding to one of the parts of the levelling machine, the intermesh of the entry rolls being controlled by entry clamping means of the machine and respectively the intermesh of the exit rolls being more particularly controlled by exit clamping means of the machine, a pre-adjustment device giving at least one reference velocity value for the motors of the levelling rolls and for the value of the electric torque required for plastic deformation of the product in each part of the machine, measuring on the entry rolls and exit rolls respectively at least the global value of the transmitted torques, and determining the real value of the torques used for plastic deformation of the product at the entry and exit respectively, comparing the determined value with the reference torque value given by the pre-adjustment model for the machine entry and exit respectively, and exerting action on the members adjusting the intermesh of the entry levelling rolls, and the members for the exit 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. The method for levelling a flat product in strip or sheet form in a levelling machine according to claim 6, further comprising determining the real value of the torques used for plastic deformation of the product at the machine entry and exit respectively, by correcting the measurement with the acceleration and deceleration torque values used during speed changes of the levelling machine. 8. The method for levelling a flat product in strip or sheet form in a levelling machine according to claim 6, further comprising determining by measurement or calculation a value of a tension induced in the product in a zone located between the entry rolls and exit rolls, and calculating from this value for the entry and for the exit the real value of the torques used for plastic deformation of the product, by correcting the measurement with the torques values needed for tension equilibrium within the product in said zone located between the entry rolls and the exit rolls. 9. The method for levelling a flat product in strip or sheet form according to claim 1, further comprising providing the levelling machine with rolls which are all motorized individually and independently and comprising separate intermesh means for each roll, a pre-adjustment device giving at least one reference velocity value for the motors of the levelling rolls and for the value of the electric torque required for plastic deformation of the product, measuring the value of the torque transmitted to each levelling roll and making a determination of the real value of the torques used for plastic deformation of the product, comprising the determined value with the reference torque value given by the pre-adjustment model for the same roll, and exerting action on the intermesh adjustment members of said levelling roll to maintain the determined value of the torque used for plastic deformation of the product equal to the reference value given by the model. 10. The method for levelling a flat product in strip or sheet form in a levelling machine according to claim 9, further comprising determining the real value of the torques used for plastic deformation of the product by correcting the measurement with the acceleration and deceleration torque value used during speed changes of the levelling machine. 11. The method for levelling a flat product in strip or sheet form in a levelling machine according to claim 9, further comprising making a determination of the tension induced in the product between each roll by measurement or by calculation, and for each roll determining the real value of the torque used for plastic deformation of the product by correcting the measurement with the torque values needed to equalize tension differences in the product upstream and downstream of each roll. 12. 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, anda 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. 13. The adjustment device for adjusting the intermesh of the rolls in a machine for leveling flat products according to claim 12, which further comprises several parts whose rolls are motorized independently in groups, each group corresponding to one of the parts of the levelling machine, each part comprising separate roll intermesh means, said adjustment device comprising a roll velocity adjustment circuit allowing servo-control by the reference velocity given by the model, and a roll intermesh adjustment circuit for each part acting separately on the position of the rolls of each part. 14. The adjustment device for adjusting the intermesh of the rolls in a machine for leveling flat products according to claim 12, wherein the rolls are all motorized independently, each roll comprising separate intermesh means, a roll velocity adjustment circuit allowing its servo-control by the reference velocity given by the model, and a separate intermesh adjustment circuit for each of the rolls acting separately on the position of said rolls. 15. The adjustment device for adjusting the intermesh of the rolls in a machine for leveling products according to claim 12, wherein said adjustment device is a proportional, integral and differential (PID) amplifier and comprises inputs for acceleration signals of the machine and for differences in tension induced in the product between upstream and downstream zones of each roll.
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이 특허에 인용된 특허 (8)
Bode Thorsten,DEX ; Bernhardt Jurgen,DEX, Control method, especially for load balancing of a plurality of electromotor drives.
Thompson Noel E. (Mangerton AUX) Johns Richard Martin (Balgownie AUX) Rozmus Gregory (Figtree AUX) Voss George F. (Bar Beach AUX) Edwards William J. (Carey Bay AUX) Thomas Peter J. (Adamstown AUX), Hot leveller automation system.
Farnik,Andrzej, Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same.
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