US3566638A - Screwdown system for a rolling mill - Google Patents
Screwdown system for a rolling mill Download PDFInfo
- Publication number
- US3566638A US3566638A US732999A US3566638DA US3566638A US 3566638 A US3566638 A US 3566638A US 732999 A US732999 A US 732999A US 3566638D A US3566638D A US 3566638DA US 3566638 A US3566638 A US 3566638A
- Authority
- US
- United States
- Prior art keywords
- pressure
- control
- mill
- signal
- roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
- B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
Definitions
- a hydraulic screwdown system for a rolling mill having its piston position to effect mill adjustment in accordance with a control signal.
- a displacement transducer is utilized to generate the control signal and in another of the embodiments, at pressure transducer is utilized in generating control signals.
- This invention is directed to a new multi-purpose fastresponding hydraulic screwdown system particularly suitable for use on conventional rolling mills and, in particular, those using automatic gage control or predetermined percentage reduction control.
- This invention provides a screwdown system which incorporates one or two independently movable hydraulic servo valve-controlled double-acting hydraulic cylinders.
- a hydraulic power unit is provided to supply the one or two servo valves.
- suitable controlling means are provided which employ stepping motors which are responsive to digital (pulse) signals provided by an automatic gage or manual control system.
- this invention is usable in conjunction with control systems for rolling mills disclosed in U.S. Pats. 3,054,311 issued Sept. 18, 1962 and 3,121,354 issued Feb. 18, 1964.
- the screwdown system as disclosed herein when provided with controlling means as in the aforementioned patents, may be operated in various modes of operation, namely position control, load control, pressure control or elongation control.
- This invention provides advantages over the prior art in that, by the use of separate double-acting hydraulic cylinders, rapid, accurate and predictable mill adjustments are achieved on either the independent cylinder or in tandem without the requirement of additional complex mechanical equipment, such as a tie-in clutch.
- pressure on the rolls of the mill may be either coordinated or adjusted rapidly in accordance with changing load conditions.
- Another object of this invention is to provide a new and improved mill control system which utilizes double acting hydraulic cylinders and a stepping motor responsive to digital (pulse) signals.
- a further object of this invention is to provide a new and improved screwdown system which permits the use of a displacement sensor in its linear range of operation.
- each of these cylinders includes a piston 13, to which are coupled upper and lower rods 14 and 15, respectively.
- the rods 15 bear upon the chocks 10 so as to press against the roll and move it in one direction to apply pressure against the material passing between roll 11 and another roll (not shown).
- the system disclosed herein is operable in either a pressure or position mode of operation.
- displacement transducers 17 are provided, such as sold by Collins or Sanborn Div. of Hewlitt Packard Company.
- the transducers 17 provide an output signal depending on the position of a central core 18 with respect to an outer transformer coil shown at 19.
- the core 18 is supported from the top of rod 14, such that it will move either upwardly or downwardly, depending on the position of the chock 10.
- means must be provided for moving the outer portion 19 with respect to the core 18 in accordance with a control signal.
- a stepping motor 20 which is responsive to signals provided from a stepping motor power and logic control block shown at 21.
- the block 21 is responsive to an automatic gage control system block 22 (such as disclosed in the aforementioned U.S. patents).
- an automatic gage control system block 22 such as disclosed in the aforementioned U.S. patents.
- a block 23 for controlling the motor power logic.
- the motor power logic converts (in a well known manner) the digital signals provided by the automatic gage control to digital pulses which will step the motor 20 to control the position of the coil 19, It should be understood that the stepping motor may be mechanically operated by replacing the block 21 with a pulse source which provides a single pulse each time a pushbutton is depressed.
- the signal from the coil 19 is then applied to an electronic amplifier 27 which controls an electronic servo valve 28.
- the valve 28 controls the flow of hydraulic fluid from a supply, the inlet pipes being shown at 29, through a magnetically controlled valve 30.
- the bottom position of valve 30 is used for position control, whereas the top portion of the valve 30 is used for pressure control.
- electrical switches shown at 31 and 32 are placed in the open position and an electrical switch 33 is placed in the closed position.
- the switch 33 is opened and the switches 31 and 32 are closed.
- a pressure transducer 34 is provided, positioned in the topmost portion in hydraulic cylinder 12.
- the transducer 34 provides a signal which indicates the pressure within that portion of the hydraulic cylinder and indicates the amount of pressure being applied to the piston through the rod 15 and, therefore, directly proportional to mill operating force.
- Command signals are provided by means of a pressure reference potentiometer, generally shown at 35, which is controlled through the shaft 36 of the stepper motor 20. In this manner, signals are provided through switches 31 and 32 and are combined (added) in the electronic amplifier 27.
- the valve 30 Under pressure control, as previously noted, the valve 30 is in position such that the pressure to the top portion of the cylinder 12 is controlled through the electronic servo valve 28, whereas fluid from a constant pressure supply 38 is provided to the bottom of the cylinder 12. In the pressure mode of operation, supply pressure is applied which is of a magnitude required to lift the roll when fluid under minimum pressure is applied to the top of the cylinder.
- a screwdown system for a mill including a roll, means for supporting a roll and means for causing said roll to move to effect mill adjustment
- the improvement comprising a double-acting hydraulic cylinder means having a piston for providing the force to effect mill adjustment, servo valve means responsive to a command signal for controlling the flow of hydraulic fluid to position said cylinder, means providing a rolling pressure reference signal, piston displacement sensing means for providing a signal indicative of piston displacement, and means for combining said reference signal and the displacement signal to derive the command signal.
- said displacement sensing means comprises a movable core positioned within a movable coil, said core and said coil coacting to provide an electrical command signal.
- a control system for a mill including a roll, means for supporting the roll and holddown means for acting on the roll to effect mill adjustment; the improvement comprising a double acting hydraulic cylinder having a piston for providing the holddown force to effect mill adjustment, a hydraulic servo valve responsive to a command signal for controlling the flow of fluid to said cylinder to position said piston, means for sensing the pressure of the fluid in said cylinder and providing a signal responsive thereto, means for providing a rolling pressure reference signal, and means for combining said pressure signal and said reference signal to provide the command signal to said servo valve.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US73299968A | 1968-05-29 | 1968-05-29 | |
US23650172 USRE28248E (en) | 1968-05-29 | 1972-03-20 | Screwdown system for rolling mill |
Publications (1)
Publication Number | Publication Date |
---|---|
US3566638A true US3566638A (en) | 1971-03-02 |
Family
ID=26929839
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US732999A Expired - Lifetime US3566638A (en) | 1968-05-29 | 1968-05-29 | Screwdown system for a rolling mill |
US23650172 Expired USRE28248E (en) | 1968-05-29 | 1972-03-20 | Screwdown system for rolling mill |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US23650172 Expired USRE28248E (en) | 1968-05-29 | 1972-03-20 | Screwdown system for rolling mill |
Country Status (5)
Country | Link |
---|---|
US (2) | US3566638A (de) |
BE (1) | BE733708A (de) |
DE (1) | DE1927331A1 (de) |
FR (1) | FR2009602A1 (de) |
GB (1) | GB1275424A (de) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3693385A (en) * | 1969-09-29 | 1972-09-26 | Ube Industries | Fluid control system for selectively self-adjusting mill reduction force or interworking roll distance |
US3736782A (en) * | 1969-10-22 | 1973-06-05 | Hitachi Ltd | Thrusting devices for rolling mills |
US3824830A (en) * | 1971-11-17 | 1974-07-23 | Morgaardshammar Ab | Two-high rolling stand |
US3936258A (en) * | 1974-01-30 | 1976-02-03 | Intercole Automation, Inc. | Calender |
US3964848A (en) * | 1973-09-15 | 1976-06-22 | Hermann Berstorff Maschinenbau Gmbh | Calendering of synthetic plastics film |
US4006617A (en) * | 1975-11-24 | 1977-02-08 | The Boeing Company | Method and apparatus for roll forming tapered structural members |
FR2324386A1 (fr) * | 1975-09-19 | 1977-04-15 | Intergrated Ind Syst | Appareil de commande de position de cylindres de laminoir |
US4079114A (en) * | 1974-10-31 | 1978-03-14 | Leesona Corporation | Method and apparatus for embossing sheets |
US4283930A (en) * | 1977-12-28 | 1981-08-18 | Aichi Steel Works Limited | Roller-dies-processing method and apparatus |
US4289013A (en) * | 1979-08-29 | 1981-09-15 | Textron, Inc. | Crown control for rolling mill |
US4471639A (en) * | 1982-11-01 | 1984-09-18 | E. W. Bliss Company, Inc. | Roll orientation control system for straightening machines |
US5115653A (en) * | 1988-11-26 | 1992-05-26 | Sms Schloemann-Siemag Aktiengesellschaft | Method of straightening rolled material |
US5575186A (en) * | 1993-10-06 | 1996-11-19 | Peddinghaus Corporation | Machine tool stroke control system |
WO2005049242A1 (de) * | 2003-11-19 | 2005-06-02 | Sms Demag Ag | Anstellzylinder in waltzgerüsten, unter anderem in vertikal-stauchgerüsten |
US20110139913A1 (en) * | 2009-12-11 | 2011-06-16 | Flsmidth A/S | Milling device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1521570A (en) * | 1976-11-24 | 1978-08-16 | Ch Poli I Im Lenin Komsomol | Automatic adjustment of the roll gap in a mill stand |
DE3420501A1 (de) * | 1984-06-01 | 1985-12-05 | Mannesmann AG, 4000 Düsseldorf | Walzenanstellanzeige |
US5179851A (en) * | 1990-12-14 | 1993-01-19 | T. Sendzimir, Inc. | Crown adjustment control system for cluster mills |
US20040089045A1 (en) * | 2001-04-20 | 2004-05-13 | Abbey Nelson D. | Compression assembly for forming rolls |
DE10243677A1 (de) * | 2002-09-20 | 2004-04-01 | Sms Demag Ag | Reibungsarmes Biegesystem in einem Mehrwalzen-Walzgerüst |
EP3150292A1 (de) * | 2015-10-02 | 2017-04-05 | Primetals Technologies Austria GmbH | Anstellvorrichtung |
-
1968
- 1968-05-29 US US732999A patent/US3566638A/en not_active Expired - Lifetime
-
1969
- 1969-05-09 GB GB23818/69A patent/GB1275424A/en not_active Expired
- 1969-05-28 BE BE733708D patent/BE733708A/xx unknown
- 1969-05-29 FR FR6917572A patent/FR2009602A1/fr not_active Withdrawn
- 1969-05-29 DE DE19691927331 patent/DE1927331A1/de active Pending
-
1972
- 1972-03-20 US US23650172 patent/USRE28248E/en not_active Expired
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3693385A (en) * | 1969-09-29 | 1972-09-26 | Ube Industries | Fluid control system for selectively self-adjusting mill reduction force or interworking roll distance |
US3736782A (en) * | 1969-10-22 | 1973-06-05 | Hitachi Ltd | Thrusting devices for rolling mills |
US3824830A (en) * | 1971-11-17 | 1974-07-23 | Morgaardshammar Ab | Two-high rolling stand |
US3964848A (en) * | 1973-09-15 | 1976-06-22 | Hermann Berstorff Maschinenbau Gmbh | Calendering of synthetic plastics film |
US3936258A (en) * | 1974-01-30 | 1976-02-03 | Intercole Automation, Inc. | Calender |
US4079114A (en) * | 1974-10-31 | 1978-03-14 | Leesona Corporation | Method and apparatus for embossing sheets |
FR2324386A1 (fr) * | 1975-09-19 | 1977-04-15 | Intergrated Ind Syst | Appareil de commande de position de cylindres de laminoir |
US4006617A (en) * | 1975-11-24 | 1977-02-08 | The Boeing Company | Method and apparatus for roll forming tapered structural members |
US4283930A (en) * | 1977-12-28 | 1981-08-18 | Aichi Steel Works Limited | Roller-dies-processing method and apparatus |
US4289013A (en) * | 1979-08-29 | 1981-09-15 | Textron, Inc. | Crown control for rolling mill |
US4471639A (en) * | 1982-11-01 | 1984-09-18 | E. W. Bliss Company, Inc. | Roll orientation control system for straightening machines |
US5115653A (en) * | 1988-11-26 | 1992-05-26 | Sms Schloemann-Siemag Aktiengesellschaft | Method of straightening rolled material |
US5575186A (en) * | 1993-10-06 | 1996-11-19 | Peddinghaus Corporation | Machine tool stroke control system |
WO2005049242A1 (de) * | 2003-11-19 | 2005-06-02 | Sms Demag Ag | Anstellzylinder in waltzgerüsten, unter anderem in vertikal-stauchgerüsten |
US20070062240A1 (en) * | 2003-11-19 | 2007-03-22 | Sms Demag Ag Eduard-Scholemann-Strasse 4 | Adjusting roll in rolling frames, among others vertical upset forging frames |
US7631531B2 (en) * | 2003-11-19 | 2009-12-15 | Sms Demag Ag | Adjusting roll in rolling frames, among others vertical upset forging frames |
AU2004291240B2 (en) * | 2003-11-19 | 2010-02-18 | Sms Siemag Aktiengesellschaft | Adjusting roll in rolling frames, among others vertical upset forging frames |
KR101121502B1 (ko) * | 2003-11-19 | 2012-03-15 | 에스엠에스 지마크 악티엔게젤샤프트 | 롤 스탠드, 특히 수직 엣저 스탠드에서의 조정 실린더 |
US20110139913A1 (en) * | 2009-12-11 | 2011-06-16 | Flsmidth A/S | Milling device |
US8091817B2 (en) | 2009-12-11 | 2012-01-10 | Flsmidth A/S | Milling device |
Also Published As
Publication number | Publication date |
---|---|
GB1275424A (en) | 1972-05-24 |
DE1927331A1 (de) | 1969-12-04 |
FR2009602A1 (de) | 1970-02-06 |
BE733708A (de) | 1969-11-03 |
USRE28248E (en) | 1974-11-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JL MACHINE ACQUISITION CORP., C/O GOLDMAN FINANCIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JONES & LAMSON MACHINE COMPANY, INC., A DE. CORP.;REEL/FRAME:005031/0442 Effective date: 19880802 |
|
AS | Assignment |
Owner name: JL MACHINE ACQUISITION CORP., C/O GOLDMAN FINANCIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JONES & LAMSON MACHINES COMPANY, INC.,;REEL/FRAME:005080/0699 Effective date: 19880802 |
|
AS | Assignment |
Owner name: JONES & LAMSON WATERBURY FARREL CORP., A CORP. OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JL MACHINE ACQUISITION CORP.;REEL/FRAME:005077/0476 Effective date: 19890509 |