EP1827722A1 - Finishing monoblock with optimised transmission ratio for a billet rolling plant - Google Patents
Finishing monoblock with optimised transmission ratio for a billet rolling plantInfo
- Publication number
- EP1827722A1 EP1827722A1 EP05778464A EP05778464A EP1827722A1 EP 1827722 A1 EP1827722 A1 EP 1827722A1 EP 05778464 A EP05778464 A EP 05778464A EP 05778464 A EP05778464 A EP 05778464A EP 1827722 A1 EP1827722 A1 EP 1827722A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stands
- bevel gear
- ratio
- gear pairs
- monoblock
- 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.)
- Granted
Links
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
- B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
-
- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- 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
- B21B13/005—Cantilevered roll stands
Definitions
- the present invention refers to a finishing monoblock with optimised transmission ratio for a billet rolling plant .
- a billet previously taken to a temperature of over 1000 0 C is operated upon to then subject it to rolling so as to gradually reduce its section to the desired size.
- high mechanical characteristics, elastic limit and deformability in drawing are parameters of particular importance.
- one of the critical sections thus consists of the finishing monoblock that, through a plurality of rolling stands, reduces the size of the billet producing the wire rod to be sent to the calibrator or directly to the laying head.
- the rolling rings or cylinders of the rolling stands are arranged alternately staggered for example by 90 degrees, so as to roll different zones of the billet.
- the total ratio, for a monoblock of ten stands, is valued at about equal to 5.6406254 to be carried out through groups of two stands with five different bevel gear pairs .
- the aforementioned ratio is, on the other hand, about equal to 3.6627 to be carried out through groups of two stands with four different bevel gear pairs.
- small bearings can be used to withstand the high speed but they have the drawback of a short lifetime and therefore require frequent maintenance.
- the variations in transmission ratio carried out through bevel gear pairs as described above also generate the need to have a bevel gear pair with dedicated ratio for each pair of stands with consequent high costs for the spare parts and consequent sizing of other parts of the stands involving both high construction costs and high costs for spares to be kept in stock.
- the general purpose of the present invention is, therefore, that of providing a finishing monoblock with optimised transmission ratio for a billet rolling plant .
- Another purpose of the present invention is that of providing a finishing monoblock with optimised transmission ratio that allows the reduction of the stocks of spare parts to be kept in storage.
- optimised transmission ratio allows the reduction of the stocks of spare parts to be kept in storage.
- Figure 1 is a schematic view of a finishing monoblock with ten stands for billet rolling plants according to the invention
- Figure 2 is a schematic view of a finishing monoblock with eight stands for billet rolling plants according to the invention.
- a monoblock 10 is schematically illustrated in figures 1 and 2 and has ten and eight stands, respectively.
- the rolling monoblock 10 comprises two parallel mechanical transmissions, a first transmission 11 and a second transmission 12, connected through a command reducer 13 in turn connected through gears to a work driving motor.
- the mechanical transmissions are equipped with pairs of conical gears A, B, C, D and with gears 17 that transmit the rotation in cascade to the rolling cylinders 18 of the various stands Gl, G2, ..., Gn of the rolling monoblock 10.
- a monoblock respectively foresees ten rolling stands Gl-GlO (figure 1) or eight rolling stands G1-G8 (figure 2) in succession, commanded alternately through the two transmissions 11 and 12, so that the first transmission 11 commands the odd stands Gl, G3, ..., G9 (or else G7) whereas the second transmission 12 commands the even stands, G2, G4, ..., GlO (or else G8) .
- the transmission according to the invention is made through the combination of a first type A, B of bevel gear pairs with a second type of bevel gear pairs C, D, by inserting a ratio into the cage exploiting the set of four zones 17, with a different ratio from the set of four 19, so that such a ratio is different between the stands and capable of creating a reduction by themselves so as to eliminate a reduction in size of the bevel gear pair to obtain four stands with the same bevel gear pair.
- the total ratio for ten stands in the solution according to the present invention is equal to 5.6907497 from which one takes a ratio given by the sets of four and equal to 1.5454545 so that it remains for the bevel gear pairs to distribute a ratio of just 3.6822498 to be carried out in groups of two only on four groups instead of five as in the stands according to the prior art .
- the differentiation of the set of four provides for a group of two stands, having optimised the intermediate stands with a ratio very close to 1:1 (to be precise 1.244898 and 0.8032786) .
- the total of the ratio with the new proposed solution is 3.682249 from which a ratio given by the sets of four again of 1.5454545 is taken, with it remaining for the bevel gear pairs to distribute just a ratio of 2.965602, to be carried out in groups of two only on three groups instead of four according to the prior art since the differentiation of the sets of four provides for a group of two stands.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
- Metal Rolling (AREA)
- Structure Of Transmissions (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT001526A ITMI20041526A1 (en) | 2004-07-28 | 2004-07-28 | "MONOBLOCK FINISHER WITH TRANSMISSION RATIO OPTIMIZED FOR A BILLETS LAMINATION SYSTEM" |
PCT/EP2005/008194 WO2006010616A1 (en) | 2004-07-28 | 2005-07-27 | Finishing monoblock with optimised transmission ratio for a billet rolling plant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1827722A1 true EP1827722A1 (en) | 2007-09-05 |
EP1827722B1 EP1827722B1 (en) | 2011-06-01 |
Family
ID=35207622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05778464A Not-in-force EP1827722B1 (en) | 2004-07-28 | 2005-07-27 | Finishing monoblock with optimised transmission ratio for a billet rolling plant |
Country Status (9)
Country | Link |
---|---|
US (1) | US20070227220A1 (en) |
EP (1) | EP1827722B1 (en) |
CN (1) | CN1993190B (en) |
AT (1) | ATE511417T1 (en) |
BR (1) | BRPI0513472A (en) |
ES (1) | ES2366282T3 (en) |
IT (1) | ITMI20041526A1 (en) |
RU (1) | RU2374019C2 (en) |
WO (1) | WO2006010616A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009050710B4 (en) | 2009-10-26 | 2016-08-04 | Sms Group Gmbh | Wire rolling stand with single drive |
IT1400496B1 (en) * | 2010-06-09 | 2013-06-11 | Danieli Off Mecc | HIGH-SPEED VERGELLA LAMINATION PROCESS AND PROCESS. |
IT1403827B1 (en) * | 2011-02-07 | 2013-10-31 | Pert S R L Con Unico Socio | MACHINE FOR THE HOT LAMINATION OF VERGELLE AND AFFINI. |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2446905A1 (en) * | 1974-10-01 | 1976-04-08 | Moeller & Neumann Gmbh | WIRE ROLLING MILL IN BLOCK FORM, SOG. WIRE BLOCK |
DE2855983A1 (en) * | 1978-12-23 | 1980-07-10 | Schloemann Siemag Ag | Rolling mill train for mfg. rod or small sections - where one motor uses two longitudinal shafts to drive row of stands via min. number of helical bevel gears |
DE3026129A1 (en) * | 1980-07-10 | 1982-02-04 | Erwin Kampf Gmbh & Co Maschinenfabrik, 5276 Wiehl | METAL TAPE RACKING SYSTEM |
US4411170A (en) * | 1981-04-10 | 1983-10-25 | Mannesmann Aktiengesellschaft | Wire rolling mill in block form, a so-called wire block with at least one driven line shaft |
US5152165A (en) * | 1991-07-11 | 1992-10-06 | Morgan Construction Company | Rolling mill |
US5280714A (en) * | 1992-07-27 | 1994-01-25 | Morgan Construction Company | Finishing block with dual speed sizing capability |
JP3535946B2 (en) * | 1997-01-10 | 2004-06-07 | 株式会社神戸製鋼所 | Strip rolling mill |
US5921152A (en) * | 1998-02-03 | 1999-07-13 | Morgan Construction Company | Optional multi-ratio gear transmission system |
US6053022A (en) * | 1998-09-14 | 2000-04-25 | Morgan Construction Company | Modular rolling mill |
US6546776B2 (en) * | 2001-01-31 | 2003-04-15 | Morgan Construction Company | High speed finishing block |
US7191629B1 (en) * | 2006-04-13 | 2007-03-20 | Morgan Construction Company | Modular rolling mill |
-
2004
- 2004-07-28 IT IT001526A patent/ITMI20041526A1/en unknown
-
2005
- 2005-07-27 CN CN2005800243572A patent/CN1993190B/en not_active Expired - Fee Related
- 2005-07-27 AT AT05778464T patent/ATE511417T1/en active
- 2005-07-27 WO PCT/EP2005/008194 patent/WO2006010616A1/en active Application Filing
- 2005-07-27 EP EP05778464A patent/EP1827722B1/en not_active Not-in-force
- 2005-07-27 RU RU2007101230/02A patent/RU2374019C2/en not_active IP Right Cessation
- 2005-07-27 ES ES05778464T patent/ES2366282T3/en active Active
- 2005-07-27 US US11/630,426 patent/US20070227220A1/en not_active Abandoned
- 2005-07-27 BR BRPI0513472-2A patent/BRPI0513472A/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2006010616A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2006010616A1 (en) | 2006-02-02 |
RU2374019C2 (en) | 2009-11-27 |
US20070227220A1 (en) | 2007-10-04 |
CN1993190A (en) | 2007-07-04 |
ES2366282T3 (en) | 2011-10-18 |
ATE511417T1 (en) | 2011-06-15 |
RU2007101230A (en) | 2008-09-10 |
ITMI20041526A1 (en) | 2004-10-28 |
BRPI0513472A (en) | 2008-05-06 |
CN1993190B (en) | 2010-06-16 |
EP1827722B1 (en) | 2011-06-01 |
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