US3824830A - Two-high rolling stand - Google Patents

Two-high rolling stand Download PDF

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Publication number
US3824830A
US3824830A US00307353A US30735372A US3824830A US 3824830 A US3824830 A US 3824830A US 00307353 A US00307353 A US 00307353A US 30735372 A US30735372 A US 30735372A US 3824830 A US3824830 A US 3824830A
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US
United States
Prior art keywords
rolls
stock
pressure
surface portions
transmitting
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
US00307353A
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English (en)
Inventor
T Bennet
K Nordstroem
K Polhaell
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.)
Morgardshammar AB
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Morgardshammar AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Morgardshammar AB filed Critical Morgardshammar AB
Application granted granted Critical
Publication of US3824830A publication Critical patent/US3824830A/en
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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
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/10—Driving arrangements for rolls which have only a low-power drive; Driving arrangements for rolls which receive power from the shaft of another roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • 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

Definitions

  • a rolling stand for hot or cold rolling of bar steel or wire rod stock comprises first and second rolls which define a nip therebetween.
  • the first and second rolls have surface portions which engage the stock and reduce its cross section as the stock advances therebetransmitting surface portions of the rolls so that the second roll is driven from the first roll by the drive transmitting surface portions.
  • the present invention relates to a rolling stand, and particularly a rolling stand for hot or coldrollingof bar steel or wire rod stock.
  • rolling stands forhot or cold rolling of bar steel or'wire rod stock comprises a pair of rolls which have surface portions which engage the stock to reduce the cross section of the stock as the stock advances therebetween. As thestock advances between the rolls, the stock tends to cause the rolls to spread or separate.
  • Such conventional rolling stands have provision for'applying a force to the rolls to prevent such rolls from separating and to effect the desired stock cross section reduction.
  • the present invention is directed to-a rolling stand and method of rolling in which separate drives, as noted above, are eliminated. This, of course, reduces the investment cost with respect to the'construction of the stand and also minimizes space requirements.
  • the present invention specifically provides a rolling stand having a pair of'stock-shaping rolls where only one of the rolls of the rolling stand'is driven by an input drive, the other roll being driven through torquetransmitting drive surfaces of the rolls. More specifically, each of the rolls has a drive-transmitting surface which is engageable with a drive-transmitting surface on the other roll. While one of the rolls is driven, the other roll is driven from or due to the engagement of the drive-transmittingsurfaces.
  • a drivetransmitting relationship is established betweeen the surface portions of the rolls by a suitable means which urges the rolls together with a force in excess of the force necessary to effect the rolling of the stock, and sufficiently in excess to provide the drive.
  • This means which applies the force to the drive-transmitting surfaces of the rolls is such that the force may be removed when rolling is not being effected so as to relieve the pressure forces on the surfaces of the rolls, thereby pro-' DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic front view of a rolling stand embodying the present invention
  • FIG. 2 is a sectional view taken approximately along the line II--II in FIG. '1;
  • FIG. 3 shows an enlarged view of an improved groove shape which may be applied to the present invention.
  • the present invention provides an improved and unique roll stand.
  • the present invention is applicable to avariety of roll stand constructions,
  • the roll stand A is a two-high roll stand andv comprisestwo pairsof rollerbearing housings l.
  • the roll stand also includes a pair of rolls 2 and 3.
  • the rolls 2, 3 have shaft portions which project stock 7, which is advanced between the rolls, is shaped as it moves through the 'nip.
  • the rolls have surface portions 2a and 3a which define a groove through which the stock moves.
  • The'roll 3 is positively driven by a suitable external drive which is generally designated by the reference numeral 8.
  • the drive 8 may be of any suitable form, such as either gearing or an independent motor, and the reference numeral 8 represents the drive shaft for driving the roll 3. It should be apparent from the drawings that there, is no external drive, 'such as an independent motor or gearing, for driving the roll 2.
  • the roll 2 is driven from the roll 3 due to frictional engagement between drivetransmitting surface portions on the rolls 2, 3.
  • the roll 2 is driven due to the'fact that the surface portions 6 thereof are in a drivetransmitting relationship with corresponding surface portions'6 on the r0113.
  • the surface portions 6, when stock is being rolled, are in a sufficient pressure relationship to effect the transmission of torque therebetween so that the roll 22 is positively driven at the surface speed of the roll 3 through those surface portions.
  • Suitable means is provided in the rolling stand A for effecting the drive-transmitting relationship between the surface portions 6 of the rolls. That means, as disclosed in FIG. 2, is designated B.
  • the means B for establishing the drive-transmitting pressure relationship specifically includes a pair of screw rods 4 which extend slidably through passageways in the roller bearing housings 1.
  • the lower roller bearing housing 1, as illustrated in FIG. 3, has recesses 10 therein for receiving the head end of the rods 4.
  • the upper roller bearing housing 1 has chamber portions therein through which the rods 4 extend and which chamber portions are divided into two chambers by piston members 5.
  • the two chambers are designated 11 and 12 in FIG. 2.
  • the chambers 11 and 12 are suitably connected to a hydraulic system for receiving hydraulic fluid from that system. It should be apparent that, when there is an equal fluid pressure in the chambers 11 and 12, the only force applied between the rolls 2 and 3 is that due to the weight of the roll 2 and the bearing. If a higher pressure is applied in the chamber portion 11 than in chamber 12, there is an upward force acting on the upper roller bearing housing 1, tending to cause the roller bearing housing 1 to raise. This, of course, causes a reduction in the force applied through the surface portions 6 of the rolls 2 and 3; In fact, the pressure in chamber 11 can be relatively high enough so as to eliminate all forces applied between the rolls 2, 3 and, specifically, between the surface portions 6 thereof. Moreover, when the roll stand is not in operation, the rolls can be moved completely apart'to provide-a gap between the surface por'tions 6.
  • FIG 3 Illustrated in FIG 3 is a specific roll construction capable of use in the roll stand embodying the present in vention.
  • the rolls define a groove 9 which is provided with an extra gap which extends axially outwardly'of the groove 9 in opposite di- 4- rections, that gap being designated 10 in the drawings.
  • the drive-transmitting portions between the rolls are designated8 in FIG. 3.
  • the gap 10 prevents or minimizes the possibility of slag or scales formed by reduction or rolling of the stock in the groove 9 to be urged between the drive-transmitting portions 8.
  • the groove 10 provides an-area that may receive the slag or scales rather than the slag or scales tending to separate the rolls, as would be the case if the slag or scales tended to creep into or between the drivetransmitting surface portions 8.
  • a rolling stand for hot or cold rolling-of bar steel or wire rod stock comprising means for reducing a dimension of the rod stock comprising first and second rolls which define a nip therebetween, said first and second rolls having surface portions which engage the stock and reduce its cross section as the stock advances therebetween, said firstand second rolls having further surface portions which engage each other and which are spaced axially from the stock engaging surface portions, drive means for driving one of said rolls, means for applying a pressure forcebetween said further surface portions for establishing a torque-transmitting relationship between said further surface portions to drivesaid second roll from said first roll due to said torque-transmitting relationship while the rod stock is advanced between the rolls and reduced thereby in dimension, means for controlling the magnitude of said pressure force, said pressure force controlling means reducing the pressure force when there is not stock between the rolls and thereby reducing the possibility of excessive wear or cracking of the rolls.
  • each of said rolls have shaft portions projecting from the opposite ends thereof, roller bearing housings associated with each shaft portion and receiving each of said shaft portions, and said means for establishing a torquetransmitting relationship between said further surface portions comprises means associated with said roller bearing housings for urging said housings together.
  • a rolling stand as defined in claim 2 wherein said means for establishing said torque-transmitting relationship comprises rod means which extends through passages in said roller bearing housings and which is slidably received in said passages, and hydraulic means associated with said rod means, said hydraulic means including first and second chamber portions and an increase in pressure in said first chamber portion relative to the pressure in said second chamber portion effecting movement of said roller bearing housings apart to thereby move said rolls apart and an increase in pressure in said second chamber portion relative to the pressure in said first chamber portion urging said rolls together and increasing the pressure relationship between said torque-transmitting surfaces of the rolls.
  • a rolling stand for hot or cold rolling of bar steel or wire rod stock comprising means for reducing a dimension of the rod stock comprising first and second rolls which define a nip therebetween, said first and second rolls having surface portions which engage the stock and reduce its cross section as the stock advances therebetween, first, drive means drivingly connected with said first roll to effect rotation thereof, and second drive means for driving said second roll, said second drive means solely comprising drive-transmitting surface portions of said first and second rolls which have a drive-transmitting pressure relationship during rolling of the stock, means for establishing said drivetransmitting pressure relationship comprising means for applying a pressure force urging said drivetransmitting surface portions into contact while the rod stock is advanced between the rolls and reduced thereby in dimension, means for controlling the magnitude of said pressure force, said pressure force controlling means reducing the pressure force when there is no stock between the rolls and thereby reducing the possibility of excessive wear and cracking of the rolls.
  • each of said rolls has shaft portions projecting from the opposite ends thereof, roller bearing housings associated with each shaft portion and receiving each of said shaft portions, and said means for establishing a torquetransmitting relationship between said further surface portions comprising means associated with said roller bearing housings for urging said housings together.
  • a rolling stand as defined in claim 6 wherein said means for establishing said torque-transmitting relationship comprises rod means which extends through passages in said roller bearing housings and which is.
  • said hydraulic means including first and second chamber portions, said first chamber portion on an increase in pressure therein relative to the pressure in said second chamber portion effecting movement of said roller bearing housing apart to thereby move said rollers apart and said second chamber portion upon a pressure increase relative to the pressure in said first chamber portion therein urging said rollers together to increase the pressure relationship between said torque-transmitting surfaces of the rollers.
  • a method of rolling bar steel or wire rod stock comprising the steps of providing first and second rolls which define a nip therebetween, advancing stock between surface portions of the rolls to reduce the cross section of the stock, positively driving one of said rolls from an external source, driving the other of said rolls due to surface pressure engagement between said rolls establishing said torque-transmitting pressure relationship between said rolls to drive the second roll from the first roll due only to said torque-transmitting relationship while the rod stock is being advanced through the rolls, and reducing said torque-transmitting pressure when there is no stock between the rolls.
  • a method of rolling as defined in claim 8 further including the step of varying the pressure relationship between the rolls for different rolling operations, and removing the pressure relationship entirely and moving one of said rolls relative to the other of the rolls when the rolling operation is completed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
US00307353A 1971-11-17 1972-11-17 Two-high rolling stand Expired - Lifetime US3824830A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7114690A SE381830B (sv) 1971-11-17 1971-11-17 Sett att forspenna ett duovalspar for varm- eller kallvalsning samt anordning for genomforande av settet

Publications (1)

Publication Number Publication Date
US3824830A true US3824830A (en) 1974-07-23

Family

ID=20299499

Family Applications (1)

Application Number Title Priority Date Filing Date
US00307353A Expired - Lifetime US3824830A (en) 1971-11-17 1972-11-17 Two-high rolling stand

Country Status (13)

Country Link
US (1) US3824830A (sv)
JP (1) JPS4875447A (sv)
CA (1) CA964500A (sv)
DD (1) DD101302A5 (sv)
DE (1) DE2255901A1 (sv)
DK (1) DK136023B (sv)
ES (1) ES408591A1 (sv)
FR (1) FR2160522B1 (sv)
GB (1) GB1411108A (sv)
IT (1) IT971016B (sv)
NO (1) NO137420C (sv)
PL (1) PL89046B1 (sv)
SE (1) SE381830B (sv)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6138886A (en) * 1997-09-19 2000-10-31 Aktiebolaget Skf Device in a wire rolling mill
US6216517B1 (en) * 1997-11-14 2001-04-17 Voest Alpine Industieanlagenbau Gmbh Precision-rolling process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1147713A (en) * 1912-07-24 1915-07-27 Cambria Steel Company Metal-rolling.
DE373441C (de) * 1923-04-12 Anton Schoepf Dipl Ing Schleppwalzwerk
US3124982A (en) * 1959-11-05 1964-03-17 Rolling mill and control system
US3559432A (en) * 1968-05-29 1971-02-02 Textron Inc Roll gap gage control
US3566638A (en) * 1968-05-29 1971-03-02 Textron Inc Screwdown system for a rolling mill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE373441C (de) * 1923-04-12 Anton Schoepf Dipl Ing Schleppwalzwerk
US1147713A (en) * 1912-07-24 1915-07-27 Cambria Steel Company Metal-rolling.
US3124982A (en) * 1959-11-05 1964-03-17 Rolling mill and control system
US3559432A (en) * 1968-05-29 1971-02-02 Textron Inc Roll gap gage control
US3566638A (en) * 1968-05-29 1971-03-02 Textron Inc Screwdown system for a rolling mill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6138886A (en) * 1997-09-19 2000-10-31 Aktiebolaget Skf Device in a wire rolling mill
US6216517B1 (en) * 1997-11-14 2001-04-17 Voest Alpine Industieanlagenbau Gmbh Precision-rolling process

Also Published As

Publication number Publication date
ES408591A1 (es) 1976-03-16
FR2160522B1 (sv) 1976-08-20
DK136023B (da) 1977-08-01
IT971016B (it) 1974-04-30
NO137420C (no) 1978-03-01
CA964500A (en) 1975-03-18
DD101302A5 (sv) 1973-11-05
JPS4875447A (sv) 1973-10-11
NO137420B (no) 1977-11-21
GB1411108A (en) 1975-10-22
PL89046B1 (sv) 1976-10-30
SE381830B (sv) 1975-12-22
DE2255901A1 (de) 1973-05-24
FR2160522A1 (sv) 1973-06-29
DK136023C (sv) 1978-01-02

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