EP0264233A2 - Improvements in rolling mills - Google Patents
Improvements in rolling mills Download PDFInfo
- Publication number
- EP0264233A2 EP0264233A2 EP87308945A EP87308945A EP0264233A2 EP 0264233 A2 EP0264233 A2 EP 0264233A2 EP 87308945 A EP87308945 A EP 87308945A EP 87308945 A EP87308945 A EP 87308945A EP 0264233 A2 EP0264233 A2 EP 0264233A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolls
- workpiece
- pair
- roll
- mill
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
- B21B13/10—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
Definitions
- This invention relates to rolling mills of the type having, in addition to the pair of driven rolls, a second pair of rolls which are normally only rotated by the action of a workpiece moving in the direction of its length between, and in engagement with, these rolls.
- Beam and section mills are mills of this type in that they have a pair of driven horizontal rolls and at least one pair of vertical rolls. The rolls constituting the or each pair of vertical rolls are positioned on opposite sides of the passline between the horizontal rolls and they are freely rotatable about their vertical axes.
- the present invention resides broadly in a rolling mill of the type set forth in which each of the normally non-driven rolls has a separate electric motor means associated with it by which the roll can be rotated so that when the workpiece and the roll come into engagement the engaging surfaces of the roll and workpiece are moving in the same direction.
- the electric motor means to rotate the rolls while the workpiece is passing through the mill between the rolls but simply to adjust the direction of rotation of the rolls and preferably the speed also so that they are substantially matched when the workpiece engages with the rolls.
- a universal rolling mill comprises a pair of horizontal rolls 2, 4 each having roll necks rotatable in bearings in bearing chock assemblies [chocks] 6, 8, respectively.
- the chocks are arranged in a mill housing strucutre 10.
- a pair of vertical rolls 12, 14 are freely rotatable on bearings 16, 18 which surround a pair of stationary shafts 20, 22 mounted in bearing chock assemblies [chocks] 24, 26, respectively.
- the horizontal rolls are driven by electric motors (not shown) by way of drive shafts 28, 30 but the vertical rolls 12, 14 are normally undriven and rely on the movement of the workpiece between the vertical rolls and in engagement therewith to cause the rolls to rotate.
- each of the chocks 24, 26. which are associated with the vertical rolls has electric motor means associated with it.
- each chock has two or more recesses 32, 34, 36 in which are located electric motors of the linear type, indicated by references 38, 40, 42.
- These motors consist of stationary windings which, when energised, interact with the metal of the adjacent roll 12, 14, to cause it to rotate. Motors of this type are available from Linear Motors Limited, Empress Road, Loughborough, England. Excitation of the motors applies a turning force to the rolls sufficient to cause them to rotate or, if they are rotating in the opposite direction, to have a braking and then reversing effect on these rolls.
- a workpiece W is passed between the pairs of rolls causing the vertical rolls to rotate such that the peripheral speed of the vertical rolls matches the linear speed of the workpiece.
- the vertical rolls continue to rotate about their vertical axes.
- the workpiece is halted on a run-out table (not shown) on the opposite side of the mill and the drive to the horizontal rolls is reversed and then the driven rolls of the run-out table are reversed to feed the workpiece back into the mill.
- the linear motors are actuated to impart a turning force on the vertical rolls in a direction opposite to that in which they are rotating.
- the linear motors are controlled so that, when the workpiece reenters the mill, at least the rolls are rotating in the correct direction and preferably the peripheral speed of the vertical rolls is substantially matched to the linear speed of the entering workpiece.
- each vertical roll 12, 14 has three motors 38, 40, 42 associated with it whereas in the Figure 3 arrangement only two motors 38, 42 are employed.
- Each motor is conveniently of the form shown in Figure 4 in which a housing 50 carries the windings on an arcuate stator.
- the stator has terminals 44 in a terminal box 46 and passages 48, 52 enable a cooling fluid to be circulated through the stator housing.
- the pair of vertical rolls may have their longitudinal axes in the same vertical plane which contains the longitudinal axes of the horizontal rolls.
- the mill may have one pair of vertical rolls arranged with their longitudinal axes in a vertical plane parallel with that containing the longitudinal axes of the horizontal rolls.
- two pairs of vertical rolls may be provided and located upstream and downstream respectively of the horizontal rolls.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
- This invention relates to rolling mills of the type having, in addition to the pair of driven rolls, a second pair of rolls which are normally only rotated by the action of a workpiece moving in the direction of its length between, and in engagement with, these rolls. Beam and section mills are mills of this type in that they have a pair of driven horizontal rolls and at least one pair of vertical rolls. The rolls constituting the or each pair of vertical rolls are positioned on opposite sides of the passline between the horizontal rolls and they are freely rotatable about their vertical axes.
- One of the problems which is prevalent with this type of mill is that of the skidding which takes place between the workpiece and the vertical rolls as the workpiece enters the mill. Due to the inertia of the considerable mass of the vertical rolls, the peripheral speed of these rolls may be quite different from the linear speed of the workpiece when the workpiece engages with these rolls and this causes wear and damage to the roll surfaces and similar wear and damage to the roll bearings. This problem is even greater in the case of a reversing mill where the workpiece enters the mill from one side, passes between the rolls and comes to rest on a run-out table on the opposite side. The gaps between the pairs of rolls are reduced and the workpiece is then reversed back between the pairs of rolls to the first side of the mill. It is found that, as the workpiece leaves the mill, the vertical rolls, being unconnected to any drive means, continue to rotate and, when the workpiece then enters the mill from the other side, the vertical rolls are still rotating but in the "wrong direction" and a very great deal of slip and skidding takes place as the workpiece causes the rolls to be first decelerated to standstill and then accelerated in the opposite direction of rotation to a speed equal to the linear speed of the workpiece.
- The present invention resides broadly in a rolling mill of the type set forth in which each of the normally non-driven rolls has a separate electric motor means associated with it by which the roll can be rotated so that when the workpiece and the roll come into engagement the engaging surfaces of the roll and workpiece are moving in the same direction.
- With such an arrangement it is not the intention for the electric motor means to rotate the rolls while the workpiece is passing through the mill between the rolls but simply to adjust the direction of rotation of the rolls and preferably the speed also so that they are substantially matched when the workpiece engages with the rolls.
- In order that the invention may be more readily understood, it will now be described, by way of example only, with reference to the accompanying drawings, in which:-
- Figure 1 is a view, partly in section, of a universal rolling mill according to the present invention;
- Figure 2 is a section through a vertical roll of the mill and its associated roll chock in accordance with one embodiment of the invention;
- Figure 3 is a section through a vertical roll of the mill and its associated roll chock in accordance with a second embodiment of the invention; and
- Figure 4 is a perspective view of electric motor means shown in Figures 1, 2 and 3.
- Referring to Figure 1, a universal rolling mill comprises a pair of
horizontal rolls mill housing strucutre 10. A pair ofvertical rolls bearings stationary shafts - The horizontal rolls are driven by electric motors (not shown) by way of
drive shafts vertical rolls - In the present invention, however, each of the
chocks more recesses references adjacent roll - During a rolling operation a workpiece W is passed between the pairs of rolls causing the vertical rolls to rotate such that the peripheral speed of the vertical rolls matches the linear speed of the workpiece. As the tail end of the workpiece emerges from the rolls, the vertical rolls continue to rotate about their vertical axes. The workpiece is halted on a run-out table (not shown) on the opposite side of the mill and the drive to the horizontal rolls is reversed and then the driven rolls of the run-out table are reversed to feed the workpiece back into the mill. In order to ensure that minimum slippage occurs between the workpiece and the vertical rolls, the linear motors are actuated to impart a turning force on the vertical rolls in a direction opposite to that in which they are rotating. This has an initial braking effect on the rolls and, having brought the rolls to standstill, causes them to rotate in the opposite direction of rotation corresponding to the direction of travel of the workpiece now re-entering the mill. The linear motors are controlled so that, when the workpiece reenters the mill, at least the rolls are rotating in the correct direction and preferably the peripheral speed of the vertical rolls is substantially matched to the linear speed of the entering workpiece.
- In the arrangement shown in Figure 2, each
vertical roll motors motors housing 50 carries the windings on an arcuate stator. The stator hasterminals 44 in aterminal box 46 andpassages - The pair of vertical rolls may have their longitudinal axes in the same vertical plane which contains the longitudinal axes of the horizontal rolls. Alternatively, the mill may have one pair of vertical rolls arranged with their longitudinal axes in a vertical plane parallel with that containing the longitudinal axes of the horizontal rolls. Furthermore two pairs of vertical rolls may be provided and located upstream and downstream respectively of the horizontal rolls.
Claims (5)
a first pair of rolls (2, 4) for rolling the workpiece said rolls being arranged with their longitudinal axes parallel and rotatably mounted in bearing chock assemblies (6) located in the housing structure;
drive means (28) connected to said first pair of rolls to rotate the rolls so as to roll the workpiece therebetween;
a second pair of rolls (12, 14) for rolling the workpiece therebetween, said rolls being arranged with their longitudinal axes parallel and substantially normal to those of the first pair of rolls; each of the rolls of said second pair being rotatably mounted in a separate bearing chock assembly (24, 26) mounted in the housing structure and characterised in that each of the rolls (12, 14) of the second pair has electric motor means (38, 40, 42) associated with the bearing chock assembly to rotate the roll so that when the roll and the workpiece come into engagement the engaging surfaces of the roll and workpiece are moving in the same direction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB868624843A GB8624843D0 (en) | 1986-10-16 | 1986-10-16 | Rolling mills |
GB8624843 | 1986-10-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0264233A2 true EP0264233A2 (en) | 1988-04-20 |
EP0264233A3 EP0264233A3 (en) | 1988-08-24 |
Family
ID=10605858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87308945A Withdrawn EP0264233A3 (en) | 1986-10-16 | 1987-10-09 | Improvements in rolling mills |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0264233A3 (en) |
JP (1) | JPS63104711A (en) |
AU (1) | AU7979787A (en) |
GB (1) | GB8624843D0 (en) |
ZA (1) | ZA877726B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0348777A2 (en) * | 1988-06-30 | 1990-01-03 | Sms Schloemann-Siemag Aktiengesellschaft | Control of section rolling mill trains |
EP0363294A1 (en) * | 1988-10-03 | 1990-04-11 | Christian Staffelbach | Apparatus for the determination of the characteristics of sets of points belonging to a rigid cylinder in rotation about its axis |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5526783A (en) * | 1992-06-29 | 1996-06-18 | Yamaha Hatsudoki Kabushiki Kaisha | Lubricant control |
JPH0754628A (en) * | 1993-08-09 | 1995-02-28 | Yamaha Motor Co Ltd | Lubriicating device of cylinder fuel injection-type two-cycle engine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2444630A1 (en) * | 1974-09-13 | 1976-04-01 | Inst Tschernoj Metallurg | ROLLING FRAMEWORK |
DE2330334B2 (en) * | 1973-06-11 | 1977-10-27 | Institut Tschernoj Metallurgn, Dnepropetrowsk (Sowjetunion) | DRIVE DEVICE FOR A MILL EQUIPPED WITH AT LEAST TWO ROLLERS PER CALIBER |
-
1986
- 1986-10-16 GB GB868624843A patent/GB8624843D0/en active Pending
-
1987
- 1987-10-09 EP EP87308945A patent/EP0264233A3/en not_active Withdrawn
- 1987-10-14 ZA ZA877726A patent/ZA877726B/en unknown
- 1987-10-15 AU AU79797/87A patent/AU7979787A/en not_active Abandoned
- 1987-10-16 JP JP62259839A patent/JPS63104711A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2330334B2 (en) * | 1973-06-11 | 1977-10-27 | Institut Tschernoj Metallurgn, Dnepropetrowsk (Sowjetunion) | DRIVE DEVICE FOR A MILL EQUIPPED WITH AT LEAST TWO ROLLERS PER CALIBER |
DE2444630A1 (en) * | 1974-09-13 | 1976-04-01 | Inst Tschernoj Metallurg | ROLLING FRAMEWORK |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0348777A2 (en) * | 1988-06-30 | 1990-01-03 | Sms Schloemann-Siemag Aktiengesellschaft | Control of section rolling mill trains |
EP0348777A3 (en) * | 1988-06-30 | 1990-12-27 | Sms Schloemann-Siemag Aktiengesellschaft | Control of section rolling mill trains |
EP0363294A1 (en) * | 1988-10-03 | 1990-04-11 | Christian Staffelbach | Apparatus for the determination of the characteristics of sets of points belonging to a rigid cylinder in rotation about its axis |
Also Published As
Publication number | Publication date |
---|---|
AU7979787A (en) | 1988-04-21 |
JPS63104711A (en) | 1988-05-10 |
ZA877726B (en) | 1988-06-29 |
GB8624843D0 (en) | 1986-11-19 |
EP0264233A3 (en) | 1988-08-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3823593A (en) | Method of rolling metal sheet articles between the driven rolls of the roll mill | |
EP0264233A2 (en) | Improvements in rolling mills | |
JPS59163228A (en) | Device for feeding paper deposit | |
CA2280712A1 (en) | A rolling apparatus and a rolling method | |
US4724698A (en) | Method and apparatus for rolling strip | |
JPH0677771B2 (en) | Side guide device | |
JP3202623B2 (en) | Hot rolling method and equipment | |
SE8303563L (en) | METHOD AND ROLLING METHOD FOR SELECTING METAL BANDS | |
JPS57190703A (en) | Rolling mill | |
JPS6364247B2 (en) | ||
JP3109259B2 (en) | Inlet and outlet side guide device for coarse mill | |
RU2075361C1 (en) | Line for cross cutting of coiled material | |
JPS6313847Y2 (en) | ||
US5911781A (en) | Integral coiler furnace drive motor | |
WO1992002320A1 (en) | Twin roll casting | |
EP0904863A2 (en) | A device in a wire rolling mill | |
ES8406236A1 (en) | Two high hot rolling mill process and narrow strip product. | |
US3908423A (en) | Rod and bar mill | |
JP2507358B2 (en) | Roll bending equipment for rolling mills | |
JPS62101309A (en) | Shifting method for roller | |
JP2706356B2 (en) | Cross roll rolling mill | |
SU1306609A1 (en) | Set of rolls for multihigh working stand | |
US6202464B1 (en) | Universal rolling mill | |
JP2989304B2 (en) | Vertical rolling mill | |
JPS6224802A (en) | Tandem rolling method of h-beam |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE ES FR GB LU |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE ES FR GB LU |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19890522 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: STUBBINS, DEREK Inventor name: HAYNES, RALPH GLADWIN |