US2523553A - Adjusting device for rolling mills - Google Patents

Adjusting device for rolling mills Download PDF

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Publication number
US2523553A
US2523553A US689361A US68936146A US2523553A US 2523553 A US2523553 A US 2523553A US 689361 A US689361 A US 689361A US 68936146 A US68936146 A US 68936146A US 2523553 A US2523553 A US 2523553A
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US
United States
Prior art keywords
pressure
jack
mains
adjusting
adjusting device
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
Application number
US689361A
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English (en)
Inventor
Blain Paul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ACIERIES ET FORGES DE FIRMINY SA
Acieries Et Forges Firminy
Original Assignee
Acieries Et Forges Firminy
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21B37/64—Mill spring or roll spring compensation systems, e.g. control of prestressed mill stands

Definitions

  • My invention is concerned with a method of controlling the pressure acting upon the rolls of a rolling mill for the purpose of performing a given duty. for instance providing for uniformity in the thickness of the rolled material.
  • This result is obtained primarily by means comprising a source or pressure fluid and a hydraulic squeezer-controlling relay so associated with the supply and the discharge that practically it cannot be cut oil simultaneously from both.
  • the pressure within the squeezing jacks oi the rolling mill is at all times either increasing or decreasing and each of these phases in the operation oi the mill is quite briei' since it is almost immediately brought to an end by the very excess in the pressure change occurring in the desired direction, which excess initiates a change in the opposite direction.
  • the squeezing jack is connected alternatingly and /1 Claim. (Ci. 80-58? at very small time intervals with the supply and the discharge.
  • Figure 2 is a diagram showing the application of the method to the determinao o i w oi the rolling pre.
  • his. 3 shows the whole arrangement incorporating this improved distributor.
  • Fig. 1 showing a conventional hydraulic irelay
  • II is the body of the relay and t the piston.
  • the body of the relay contains three pipe channels, one pipe t connected to the adlusting lack, one pipe t connected to the water mains, and finally a thin one 5 connected to the discharge.
  • the adjusting jack In line with the relative position of the piston and the body oi the relay, the adjusting jack is placed incommunication with the high-pressure water mains or with the discharge, the pipe leading to the jack being theoretically closed when the piston is in the position shown in Fig. i.
  • the piston In fact, outside the periods of sharp change of load of the mill during which the adjusting Jack is put in open connection with the highpressure mains or with the exhaust, the piston only changes its position imperceptibly from the position shown by the figure; the pressure in the Jack that is enforced by the working conditions of the mill is regulated by the relay in the following way: a slight escape exists between the space i in connection with the high-pressure mains and the space 8 connected to the Jack; in the same way a slight escape exists between the space it and the space 8 connected to the exhaust.
  • the means for feeding the jacks that is the object of my invention, consists in placing the jack, alternatively and at very short intervals, in communication with the high-pressure mains and with the exhaust.
  • These alternatives of feeding and discharge cause slight fluctuations of pressure in the Jacks, that, provided they are sumciently slight which is so if the frequency of the feed and discharge intervals is large enough, cannot prove a hindranc to the rolling, with the mean pressure standing at a figure that depends only on the relative importance of the intervals of feed and discharge, it the pressure of the mains remains steady.
  • Fig. 2 illustrates, as an example with no binding limits, 9, way of applying this method for regulating the pressure of the rolling. It designates the body of the distributor in which a piston II is adapted to move.
  • the body of the distributor contains thre tubular channels of which one i2 connected to the adjusting jack, another it connected to the high-pressure mains and finally a third marked HI that is connected to the exhaust.
  • the piston takes up two end positions in the distributor body, that shown in accuse illustrated. the jack communicates with the highpressure mains. In the other position, the jack connects with the exhaust.
  • the piston when working, the piston goes without stop from one of the positions to the other in step with the impulses that are given by the electromagnet,- the coil of which is closed or opened by a contact placed tor instance on a contrivance for measuring the thick'- ness of the band, and this contact closes the circuit oi the electromagnet when the thickness goes beyond the set value and opens the circuit in the opposite case.
  • the adjusting jack is fed directly with high-pressure liquid by the distributor. It is possible, still keeping within the sphere of my invention, to act on the adjusting jack with the help 01' a hydraulic multiplicator, while the distributor in this case supplies liquid at medium pressure to the big cylinder of'the multiplicator, with the jack connected to the small cylinder.
  • Fig. 3 illustrates what is the arrangement in this case 01' the control members of the adjusting mechanism.
  • 20 designates a roll stand furnished with hydraulic adjusting jacks 2
  • the piston oi the distributor is actuated by the electromagnet 25 in antagonism with the spring 20, and the contact that closes or opens the circuit of the electromagnet is controlled by a contrivance for measuring thicknesses 21.
  • a control system for maintaining the thickness 01' the rolled material substantially uniform comprising a source of pressure fluid, hydraulic means tor. tightening the rolls, a control valve comprising a casing having spaced ports connected respectively to the source of pressure fluid, the roll tightening means and an exhaust, a valve member freely reciprocable in said casing between a position in which the roll tightening means is connected with the source of pressure fluid and a position in which the roll tightening means is connected with the exhaust, an electromagnet for holding the valve member in one of said positions when energized, means responsive to the thickness 01 the rolled material for energizing said electromagnet upon predetermined variation 01 thickness or the rolled material, and spring means for moving said valve member to the other of said positions when the electromagnet is deenergized and for holding it at said other position until the electromagnet is reenergized.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Control Of Metal Rolling (AREA)
US689361A 1946-01-29 1946-08-09 Adjusting device for rolling mills Expired - Lifetime US2523553A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR852388X 1946-01-29

Publications (1)

Publication Number Publication Date
US2523553A true US2523553A (en) 1950-09-26

Family

ID=9326615

Family Applications (1)

Application Number Title Priority Date Filing Date
US689361A Expired - Lifetime US2523553A (en) 1946-01-29 1946-08-09 Adjusting device for rolling mills

Country Status (5)

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US (1) US2523553A (en))
BE (1) BE470806A (en))
DE (1) DE852388C (en))
FR (1) FR920775A (en))
GB (1) GB629623A (en))

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694322A (en) * 1949-10-20 1954-11-16 Landis Machine Co Threading appliance
US2736217A (en) * 1952-09-16 1956-02-28 Blain
US3075417A (en) * 1958-10-31 1963-01-29 Siderurgie Fse Inst Rech Hydraulic arrangement for adjusting the spacing of the rolls in rolling mills and for compensating mill spring
US3124982A (en) * 1959-11-05 1964-03-17 Rolling mill and control system
US3286495A (en) * 1963-02-11 1966-11-22 Spidem Ste Nle Deformation compensating hydraulic device for rolling mills of the hydraulic mechanical pressure type
US3326028A (en) * 1963-04-01 1967-06-20 Hitachi Ltd Thrusting devices for rolling mills
US3333453A (en) * 1963-05-13 1967-08-01 Cie Des Ateliers Rolling mills having hydraulic pressure control
US3391557A (en) * 1964-11-12 1968-07-09 Fox Ind Inc Gauge control rolling mills and methods of rolling
US3635060A (en) * 1968-09-03 1972-01-18 Mitsubishi Heavy Ind Ltd Thrusting arrangement for a rolling mill

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE942505C (de) * 1948-06-02 1956-05-03 Kapella Ltd Einstellvorrichtung fuer Metallstreifen-Walzwerke, die aus zwei Walzen bestehen
DE966321C (de) * 1951-10-24 1957-07-25 Morgan Construction Co Einrichtung zum Einstellen der Walzen in einem Walzwerk
DE922702C (de) * 1952-06-11 1955-01-24 Huettenwerke Siegerland Ag Vorrichtung zum Regeln des Walzspaltes bei Reversier-Bandwalzwerken
JPS4947083Y1 (en)) * 1969-07-07 1974-12-24

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1969536A (en) * 1932-02-18 1934-08-07 Gen Electric Apparatus for controlling the thickness of strip material
US2040755A (en) * 1934-05-08 1936-05-12 Meyer Eduard Regulating means for rolling mechanisms
US2267380A (en) * 1938-11-16 1941-12-23 Oilgear Co Hold-down system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025562A (en) * 1932-06-24 1935-12-24 Landis Tool Co Control for sheet rolling mills
DE634325C (de) * 1934-01-14 1936-08-24 Reineke Regler Vertriebsgesell Vorrichtung zum selbsttaetigen fortlaufenden Nachstellen der Walzen von Walzwerken
DE631500C (de) * 1934-05-09 1936-06-22 Eduard Meyer Selbsttaetige hydraulische Nachstellvorrichtung fuer Walzwerke
BE469551A (en)) * 1943-03-04

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1969536A (en) * 1932-02-18 1934-08-07 Gen Electric Apparatus for controlling the thickness of strip material
US2040755A (en) * 1934-05-08 1936-05-12 Meyer Eduard Regulating means for rolling mechanisms
US2267380A (en) * 1938-11-16 1941-12-23 Oilgear Co Hold-down system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694322A (en) * 1949-10-20 1954-11-16 Landis Machine Co Threading appliance
US2736217A (en) * 1952-09-16 1956-02-28 Blain
US3075417A (en) * 1958-10-31 1963-01-29 Siderurgie Fse Inst Rech Hydraulic arrangement for adjusting the spacing of the rolls in rolling mills and for compensating mill spring
US3124982A (en) * 1959-11-05 1964-03-17 Rolling mill and control system
US3286495A (en) * 1963-02-11 1966-11-22 Spidem Ste Nle Deformation compensating hydraulic device for rolling mills of the hydraulic mechanical pressure type
US3326028A (en) * 1963-04-01 1967-06-20 Hitachi Ltd Thrusting devices for rolling mills
US3333453A (en) * 1963-05-13 1967-08-01 Cie Des Ateliers Rolling mills having hydraulic pressure control
US3391557A (en) * 1964-11-12 1968-07-09 Fox Ind Inc Gauge control rolling mills and methods of rolling
US3635060A (en) * 1968-09-03 1972-01-18 Mitsubishi Heavy Ind Ltd Thrusting arrangement for a rolling mill

Also Published As

Publication number Publication date
BE470806A (en))
FR920775A (fr) 1947-04-17
DE852388C (de) 1952-10-13
GB629623A (en) 1949-09-23

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