EP2580005A2 - High-speed wire rod rolling apparatus and method - Google Patents
High-speed wire rod rolling apparatus and methodInfo
- Publication number
- EP2580005A2 EP2580005A2 EP11738042.8A EP11738042A EP2580005A2 EP 2580005 A2 EP2580005 A2 EP 2580005A2 EP 11738042 A EP11738042 A EP 11738042A EP 2580005 A2 EP2580005 A2 EP 2580005A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- round
- oval
- stands
- unit
- 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
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/24—Roll wear
-
- 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
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
-
- 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
- B21B35/04—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills each stand having its own motor or motors
Definitions
- the present invention relates to a wire rod hot rolling apparatus and method thereof, and in particular is applied to the so-called fast rolling blocks or finish blocks or Wire-Rod-Blocks, arranged downstream of the rolling mill.
- Wire rod rolling plants comprising a wire rod block which traditionally consists of a sequence of 8-10 rolling stands with pairs of overhangingly mounted rings having rotation axes mutually and alternatively offset by 90° along the pass- line.
- the rolling stands are mechanically restrained to one another by one or more motion transmission shafts which, by means of bevel gear speed shifts, are controlled by a single motor or by several motors connected to one another along a mechanical axis. They are normally synchronous, water- cooled motors, with powers in excess from 2500 kW to over 6000 kW.
- the rolling sequence used in the blocks is of the oval-round type, in which the odd rolling stands (i.e. those in position 1 , 3, 5 etc.) reduce the wire rod from round to oval shape, while the even rolling stands (i.e. those in position 2, 4, 6 etc.) reduce the wire rod from oval to round shape.
- the wire rod blocks generally consist of a 10-step oval-round sequence, i.e. 5 oval and 5 round in total.
- one or two round-round calibrating rolling stands may be added downstream of the main sequence.
- the system of speed shift having defined shift ratios, requires that for each change of final diameter of the wire rod corresponding changes must be made to the inlet sections and the calibration process sections of the rings of all the rolling stands of the block, i.e. all the rolling rings must be replaced.
- Document EP0875302A2 describes a finish block for wire rod rolling mill having rolling stands with all mutually independent motors which are selected and controlled separately by means of a common process control system. Furthermore, a separate control device of the motors may be arranged upstream of each drive unit.
- the rolling stands have pairs of rollers or rolling rings arranged in series and provided with screw-down mechanisms and mill guides.
- the solution suggested in this document implies an extreme complication to the electric part of the plant, given the significant number of motors needed. For example, 10 motors and 10 drives respectively are needed in a 10-step wire rod block. Furthermore, the excessive fractioning of the motors leads to dimensioning the total installed power considerably in excess.
- Another object of the present invention is to control with extreme accuracy the rolling draw between the rolling stands so as to considerably improve end product tolerances.
- Another object of the present invention is to make a rolling apparatus which allows to obtain a high productivity also for small sections of 5,5-6,5/7 mm of diameter or equivalent at a rolling speed equal to 120 - 150 m/sec and more.
- a further object of the invention is to provide a wire rod rolling method by means of the use of the aforesaid apparatus.
- the present invention intends to reach the objects indicated above by making a wire rod rolling apparatus, defining a rolling direction, comprising two or more rolling units, arranged in sequence in the rolling direction, each rolling unit comprising two or more rolling stands and at least one first and one second motor for actuating the two or more rolling stands, each of said rolling stands having a pair of rolling rings with respective either oval or round section gauge, the rolling stands being arranged along the rolling direction so as to alternatively have in succession a rolling stand with oval section gauge followed by a rolling stand with a round section gauge, characterized in that in at least one of said rolling units the respective first motor actuates the rolling stands with oval section gauge and the respective second motor actuates the rolling stands with round section gauge in a manner independent from the first motor.
- the object of the invention is thus reached by an arrangement of the rolling stands, in at least one of the rolling units of the apparatus, having separate pass- line drives, i.e. the drive of the oval gauge section rolling stands is separate from that of the round gauge section rolling stands, for each rolling unit which constitutes the wire rod rolling apparatus.
- the drive of the oval gauge section rolling stands is separate from that of the round gauge section rolling stands, for each rolling unit which constitutes the wire rod rolling apparatus.
- the invention applies to various arrangements of the rolling units, which by way of non-limiting example, may have a 4+4+2 or 4+4+3 type layout or even a 6+4 or 6+5 type layout.
- the apparatus of the invention also allows to vary the global reduction degree of the wire rod in the finish block in a simple, effective manner by means of the simultaneous free selection of the diameter of the rolling rings in the various rolling stands.
- Fig. 1 shows a kinematic diagram of the rolling apparatus of the invention
- Fig. 2 shows a kinematic diagram of a first variant of the apparatus of the invention
- Fig. 3 shows a kinematic diagram of a second variant of the apparatus of the invention
- Fig. 4 shows a kinematic diagram of a third variant of the apparatus of the invention
- Fig. 5 shows a kinematic diagram of a fourth variant of the apparatus of the invention
- Fig. 6 shows a technological diagram of the rolling apparatus of the invention.
- the same reference numbers are used to indicate the same components of the apparatus in the various figures.
- Figure 1 shows a kinematic diagram of the wire rod rolling apparatus 1 according to the invention, hereinafter also defined as finish block or conventionally called wire rod block.
- the first unit 10 considered in the rolling direction carries out the first four rolling steps, with a rolling sequence in which the gauge section is oval-round- oval-round.
- the terms "round or oval” means gauge with round or oval section.
- the second unit 20 carries out four rolling steps with an oval-round-oval-round rolling sequence.
- One motor is provided for actuating the two round steps, arranged in even positions, and one motor, independent from the first, is provided to actuate the two oval steps which occupy the odd positions.
- the third unit 30, also called finishing/calibrating unit carries out at least two rolling steps with an oval-round rolling sequence. Two mutually independent motors respectively actuate each step of this unit.
- the motors are air-cooled for the sake of constructive simplicity.
- medium voltage MV motors may be used.
- Low voltage LV motors may also be used because they guarantee higher reliability due to the absence of brushes.
- the rolling process which is carried out by means of this first embodiment of the invention follows the following steps.
- the product being rolled which defines the pass-line A and has a rolling advancement sense indicated by the arrow of line A, is passed in the first rolling unit 10, which comprises four rolling stands 71 , 72, 73, 74, the rolling rings of which have respective oval S1 , round S2, oval S3, round S4 calibration in succession (conventionally indicated with the sequence of letters O- R-O-R).
- This unit 10 is controlled by two motors of power equal to 1500 kW.
- One motor 1 1 actuates the oval section odd rolling stands 71 and 73 and the other motor 12 actuates the round section even rolling stands 72 and 74.
- the product being rolled crosses in succession the second rolling unit 20, which comprises four rolling stands 75, 76, 77, 78, the rolling rings of which have oval S5, round S6, oval S7, round S8 (O-R-O-R) calibration in succession.
- This unit 20 is controlled by two motors of power equal to 1500 kW.
- One motor 21 actuates both oval section odd rolling stands 75 and 77 and the other motor 22 actuates both round section odd rolling stands 76 and 78.
- the product being rolled crosses subsequently the third rolling unit 30 which comprises two rolling stands 79, 80, the rolling rings of which have respective oval S9 and round S10 (O-R) calibration in succession.
- This unit 30 is controlled by two motors of power equal to 1300 kW.
- One motor 31 actuates the oval section odd rolling stand 79 and the other motor 32 actuates the round section even rolling stand 80.
- the finishing/calibrating unit 30' provides a further round rolling step 81 provided with its own motor 33 independent from motors 31 , 32.
- the three rolling steps are thus arranged in oval-round-round (O-R-R) sequence.
- the last round rolling step 81 carries out a low section reduction for the purpose of the limiting the ovalization of the product at the outlet of the finishing/calibrating unit 30' allowing to obtain an "improved rod" with narrow tolerance.
- the rolling centre distance of the last two rolling stands 80 and 81 is as small as possible to limit the rotation of the wire rod in the passage from the second to the third rolling stand, guaranteeing that the action of the last rolling stand 81 actually eliminates the residual ovalization of the rolled product, squeezing the wire rod according to the longer axis of the section, result which is instead not guaranteed with greater centre distances.
- the last rolling step of the product is carried out in a rolling stand chosen from the three units 10, 20, 30 or 30' according to the final section of the rolled product (the diameter of which varies from 5.5 to 20 mm).
- a rolling stand chosen from the three units 10, 20, 30 or 30' according to the final section of the rolled product (the diameter of which varies from 5.5 to 20 mm).
- the last rolling step is carried out in the rolling stand 80 with round gauge in the third unit 30.
- the first two rolling stands 75, 76 of the second unit 20 are bypassed upstream.
- the last rolling step is carried out on the round gauge of the rolling stand 78 of the second unit 20.
- the first two rolling stands 75, 76 of the second unit 20 are bypassed upstream.
- the last rolling step is carried out on the first round gauge of the rolling stand 76 of the second unit 20 and the last rolling stand 74 of the first unit 10 and the first rolling stand 75 of the second unit 20 are bypassed upstream.
- the last rolling step is carried on the second rolling stand 74 with round gauge of the first unit 10.
- the wire rod rolling apparatus comprises ten rolling stands, i.e. the same total number of rolling stands as the main variant described above, but the rolling chambers are incorporated in two rolling units 1 10, 120 (6+4 configuration).
- the first rolling unit groups the first six rolling stands 171 , 172, 173, 174, 175, 176, arranged in such a sequence that the respective gauges are in succession oval S1 , round S2, oval S3, round S4, oval S5 and round S6 in the rolling direction.
- two mutually independent motors 1 1 1 , 1 12 are provided for actuating the six first rolling stands.
- One motor actuates the three oval section gauge rolling stands 171 , 173, 175 and the second motor independently actuates the three round section gauge rolling stands 172, 174, 176.
- the second rolling unit groups the four subsequent rolling stands 177, 178, 179, 180 arranged in such a sequence that the respective gauges are in succession oval S7, round S8, oval S9, round S10 in direction of the rolling sense, and two mutually independent second motors 121 , 122 are provided for actuating these four rolling stands 177, 178, 179, 180.
- this variant of the apparatus of the invention may be integrated with a further round section gauge rolling stand 181 , as shown in figure 4, which is incorporated in the second rolling unit 120', which thus consists of five rolling stands (6+5 configuration).
- the last rolling stand 181 is actuated by a third motor 123 independent from the two motors 121 , 122.
- the rolling centre distance of the last two rolling stands 180 and 181 is as small as possible to limit the wire rod rotation.
- a further variant of the apparatus 1 of the invention is shown in figure 5.
- This variant is shown in a particular application of the 4+4+2 rolling stand configuration, but it is understood that it is equally applicable also to the other rolling stand configurations described above.
- the first rolling unit 10 comprises a kinematic connection mechanism 1 15, e.g. of the mechanical toothed wheel type, which can connect the transmission device of the motor 1 1 to the motion transmission device of the motor 12.
- a kinematic connection mechanism 1 e.g. of the mechanical toothed wheel type
- a kinematic connection mechanism 1 16, equal to the previous one 1 15, may be arranged between the motion transmissions of the two motors 21 and 22 of the second rolling unit 20 to carry out the same functions described for the first unit 10.
- the rolling unit can work with motors at independent rpm, with the kinematic connections 1 15 and 16 disengaged, or with the motors mechanically connected and fixed speed ratios between rolling units.
- the rolling product coming from the rolling train arranged upstream moves along the pass-line A and passes firstly in a prebox 2 for controlling the inlet temperature in the finishing apparatus; subsequently an equalizing duct 3 is provided.
- the rolling product has a temperature of approximately 900° ⁇ and moves at a speed equal to 16% of the maximum outlet speed.
- the rolling product passes through a water box 4 for a further thermal treatment and is passed through the second rolling unit 20, in which it enters at a temperature of approximately 900°C and a maximum speed equal to 42% of the maximum outlet speed.
- the product is passed in a water box 9 for a further check of the winding temperature which takes the temperature to a value from approximately 850°C to approximately 950°C, before the turns fall onto the mat.
- the water cooling elements (the so-called water boxes), arranged between the rolling units, allow to advantageously obtain a better temperature control of the rolled product at inlet and at outlet of each units at high rolling speed.
- the rolled product is stiffer and thus better withstands peak loads generated by the frictions that the rolled product develops at high speeds: in this manner safe introductions of the rolled product between the various operative units is guaranteed even at very high rolling speeds (up to 120, 130, 140 or 150 m/sec).
- the rolled product vibrates less during the transit towards the wrapping or laying head and also inside the water boxes, with less risk of catching.
- the apparatus of the invention further has the advantages given by the solutions of the prior art with independent motors for each rolling stand, i.e. a ring management flexibility, a free setting of the product draw and a consequent improvement of the tolerances of the wire rod combined with a better possibility of controlling rolling temperatures.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2010A001035A IT1400496B1 (en) | 2010-06-09 | 2010-06-09 | HIGH-SPEED VERGELLA LAMINATION PROCESS AND PROCESS. |
PCT/IB2011/052513 WO2011154914A2 (en) | 2010-06-09 | 2011-06-09 | High-speed wire rod rolling apparatus and method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2580005A2 true EP2580005A2 (en) | 2013-04-17 |
EP2580005B1 EP2580005B1 (en) | 2014-05-14 |
Family
ID=43740343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11738042.8A Active EP2580005B1 (en) | 2010-06-09 | 2011-06-09 | High-speed wire rod rolling apparatus and method |
Country Status (5)
Country | Link |
---|---|
US (1) | US20130086963A1 (en) |
EP (1) | EP2580005B1 (en) |
CN (1) | CN102947017B (en) |
IT (1) | IT1400496B1 (en) |
WO (1) | WO2011154914A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUA20162023A1 (en) * | 2016-03-25 | 2017-09-25 | Giulio Properzi | PROCEDURE FOR TRANSFORMING VERGELLA OF NON-FERROUS METALS AND THEIR ALLOYS IN HIGH-STRETCH WIRE AND IN THE RICOTTO STATE. |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103008357A (en) * | 2012-12-12 | 2013-04-03 | 秦建平 | Continuous rolling equipment for metal rod, pipe and section bar |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1016392A (en) * | 1950-03-27 | 1952-11-10 | Kocks Gmbh Friedrich | Wide Flat Rolling Mill and Tube Rolling Mill |
JP2687488B2 (en) * | 1987-10-30 | 1997-12-08 | 大同特殊鋼株式会社 | Rolling method for sizing mill and round bar |
IT1235119B (en) * | 1989-07-10 | 1992-06-18 | Danieli Off Mecc | LAMINATION CAGE WITH MULTIPLE ROLLER ROLLERS FOR FAST LAMINATION. |
US5595083A (en) * | 1994-08-01 | 1997-01-21 | Morgan Construction Company | Modular rolling mill |
DE19717201A1 (en) * | 1997-04-24 | 1999-01-21 | Schloemann Siemag Ag | Prefabricated block system for wire rod mills |
US7154563B1 (en) * | 1998-04-30 | 2006-12-26 | Stmicroelectronics Asia Pacific Pte Ltd. | Automatic brightness limitation for avoiding video signal clipping |
ITUD20010098A1 (en) * | 2001-05-25 | 2002-11-25 | Sms Demag Aktiengesellshaft | PERFECTED CONTINUOUS CASTING AND HOT ROLLING PLANT FOR THE DIVERSIFIED PARALLEL PRODUCTION OF BARS OR WIRES |
ITMI20041526A1 (en) * | 2004-07-28 | 2004-10-28 | Vai Pomini Srl | "MONOBLOCK FINISHER WITH TRANSMISSION RATIO OPTIMIZED FOR A BILLETS LAMINATION SYSTEM" |
ITMI20041897A1 (en) * | 2004-10-06 | 2005-01-06 | Vai Pomini Srl | "EQUIPMENT AND METHOD FOR THE REDUCTION OF SECTION AND CALIBRATION OF MILL PRODUCTS FOR VERGELLA" |
ITMI20050428A1 (en) * | 2005-03-16 | 2006-09-17 | Vai Pomini Srl | LAMINATION MONOBLOC WITH INTERFRIGERATION |
US7191629B1 (en) * | 2006-04-13 | 2007-03-20 | Morgan Construction Company | Modular rolling mill |
US7523632B2 (en) * | 2007-02-15 | 2009-04-28 | Morgan Construction Company | Modular rolling mill |
CN101259588A (en) * | 2008-04-28 | 2008-09-10 | 洛阳邦强机械有限公司 | Fewer stands longitudinal hot rolling minor diameter thin wall seamless steel tube rolling technique and equipment thereof |
-
2010
- 2010-06-09 IT ITMI2010A001035A patent/IT1400496B1/en active
-
2011
- 2011-06-09 WO PCT/IB2011/052513 patent/WO2011154914A2/en active Application Filing
- 2011-06-09 US US13/702,296 patent/US20130086963A1/en not_active Abandoned
- 2011-06-09 CN CN201180027872.1A patent/CN102947017B/en active Active
- 2011-06-09 EP EP11738042.8A patent/EP2580005B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011154914A2 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUA20162023A1 (en) * | 2016-03-25 | 2017-09-25 | Giulio Properzi | PROCEDURE FOR TRANSFORMING VERGELLA OF NON-FERROUS METALS AND THEIR ALLOYS IN HIGH-STRETCH WIRE AND IN THE RICOTTO STATE. |
WO2017162849A1 (en) * | 2016-03-25 | 2017-09-28 | Giulio Properzi | Method for converting wire rod of nonferrous metals and alloys thereof to wire with high elongation and in the annealed state |
RU2734291C2 (en) * | 2016-03-25 | 2020-10-14 | Джулио ПРОПЕРЦИ | Method of converting rolled wire from non-ferrous metals and their alloys into wire with high elongation and in annealed condition |
Also Published As
Publication number | Publication date |
---|---|
CN102947017B (en) | 2016-01-20 |
WO2011154914A3 (en) | 2012-02-16 |
CN102947017A (en) | 2013-02-27 |
ITMI20101035A1 (en) | 2011-12-10 |
US20130086963A1 (en) | 2013-04-11 |
WO2011154914A2 (en) | 2011-12-15 |
IT1400496B1 (en) | 2013-06-11 |
EP2580005B1 (en) | 2014-05-14 |
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