WO2014017944A1 - Способ холодной деформации непрерывной металлической полосы - Google Patents
Способ холодной деформации непрерывной металлической полосы Download PDFInfo
- Publication number
- WO2014017944A1 WO2014017944A1 PCT/RU2012/000615 RU2012000615W WO2014017944A1 WO 2014017944 A1 WO2014017944 A1 WO 2014017944A1 RU 2012000615 W RU2012000615 W RU 2012000615W WO 2014017944 A1 WO2014017944 A1 WO 2014017944A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- strip
- bending
- deformation
- group
- bending device
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with rolling
Definitions
- the invention relates to the processing of metals without removing chips, in particular, to the production of a metal strip by cold deformation.
- a known method of cold deformation of a continuous metal strip in the manufacture of welded pipes comprising pulling the strip with a pulling device between three non-driven rollers of the bending device, in which the middle roller has a diameter less than the diameter of the extreme rollers and together with the strip covering it at an angle of more than 180 °, is pressed by the tension of the strip to the extreme the rollers with a gap between them more than two strip thicknesses (a. with. the USSR J 1500405, op. 08.15.1989 g).
- the disadvantage of this method is the lack of regulation of the magnitude of the deformation of the strip.
- a known method of cold deformation of a continuous metal strip in the manufacture of welded pipes including pulling it with rear and front tension created respectively by tension and pulling devices, between three non-driven rollers of the bending device, in which the middle roller having a diameter smaller than the diameter of the extreme rollers is covered by a strip of the angle is more than 180 ° and is pressed together with it by pulling the strip to the extreme rollers with a gap between them more than two strip thicknesses, and adjusting the amount of deformation TVOC change its tension without exceeding front tension level, which corresponds to a pulling stress in pulling the strip of 0.85 yield strength of its metal (Russian patent N2 2412016 on the invention, op 20.02 201 1 year..) - prototype.
- the prototype provides the ability to control the magnitude of the deformation of the strip, but its disadvantage is the small value of the deformation of the strip and the increased specific energy consumption per unit of its deformation. Disclosure of invention
- the task of the invention is to increase the magnitude of the deformation of the strip and reduce the specific energy consumption per unit of its deformation.
- the method of cold deformation of a continuous metal strip includes stretching it with rear and front tension between three non-driven rollers of each of the bending devices, in which the middle roller having a diameter smaller than the diameter of the extreme rollers is covered by a strip at an angle of more than 180 ° and is pressed together with it by the tension of the strip to the extreme rollers with a gap between them of more than two strip thicknesses, and the regulation of the deformation of the strip by changing its tension without exceeding I forward tension level corresponding to a pulling stress in the stretch strip of 0.85 yield strength of its metal.
- the strip is subsequently pulled through a group of bending devices consisting of at least two bending devices, and through each of the individual bending devices, through at least one separate bending device.
- the strip is pulled with its rear and front tensions in each bending device of the group and in each individual bending device.
- the pulling is carried out using a tension device installed in front of the input side of the first group bending device along the process, auxiliary pulling devices, the first of which is installed behind the output side of the last bending device of the group, and each of the others behind the output side of each individual bending device, except the last , and a pulling device installed behind the output side of the last separate bending device.
- the deformation of the strip is regulated in the group of bending devices and in each individual bending device in the ranges, the upper boundary of which does not exceed the maximum allowable, respectively, for a group of bending devices and for each individual bending device, the coefficient of stretching of the strip.
- the deformation in them is controlled by changing the relations, respectively, the speed of the strip exit from the last bending device of the group to the speed of its entry into the first bending device of the group and the speed of the strip from each individual bending device to the speed of its entry into this bending device.
- the magnitude of the deformation of the strip increases several times, and the specific energy consumption per unit of deformation of the strip decreases several times. Moreover, the more, to the optimum limit, the number of bending devices in a group and the greater the number of individual bending devices, the greater the deformation of the strip and the greater the decrease in specific energy consumption per unit of its deformation.
- the number of bending devices in the group is selected based on minimizing the total costs.
- the decrease in the specific energy consumption per unit of deformation of the strip increases with the increase in the number of bending devices in the group, because with a constant value of the front tension, the total deformation of the strip in this group of devices increases.
- the amount of deformation of the strip in it is significantly lower than in the last bending device of the group, however, it increases the total amount of deformation of the strip in the group of bending devices and therefore reduces the specific energy consumption per unit of its total deformation.
- An additional increase in the number of bending devices in the group (over and above the two devices) will increase the total amount of band deformation in them, which will further reduce the specific energy consumption per unit of its deformation.
- An increase in the number of bending devices in the group reduces the amount of necessary back tension of the strip, which the tension device should provide.
- the strip in individual bending devices Due to the proposed sequential deformation of the strip in individual bending devices, a significant part (about 80%) of its front tension, which remains unused after overcoming the deformation resistance of the strip in each individual bending device, is the main component for another front tension, which pulls the strip from the previous separate bending devices or from a group of bending devices.
- the magnitude of this other front tension is equal to the sum of the indicated component of the front tension and the traction force of the auxiliary pulling device.
- the traction force of the auxiliary pulling device is less, about 4 times, of the specified component of the front tension. That is, the successive deformation of the strip in individual bending devices using auxiliary pulling devices necessary to add forward tension to the required norm will allow for high deformation of the strip in each of these individual bending devices.
- the decrease in the specific energy consumption per unit of its deformation is greater, the greater the number of individual bending devices and the corresponding number of auxiliary pulling devices.
- the maximum permissible coefficient of strip stretching depends mainly on the ratio of the strip thickness to the diameter of the middle roller. The greater the thickness of the strip and the smaller the diameter of the middle roller, the greater the maximum allowable stretch coefficient of the strip.
- the maximum permissible coefficient of strip drawing in the group of bending devices depends on their number in the group. The more, to the optimum limit, their number in the group, the greater the maximum permissible coefficient of strip drawing in the group of bending devices.
- the required number of individual bending devices depends on the required overall coefficient of strip drawing and on the maximum permissible coefficient of strip drawing, both in the group of bending devices and in each of the remaining individual bending devices.
- the drawing shows a diagram of the proposed method for cold deformation of a metal strip using a tensioner, a group of bending devices consisting of two bending devices, three separate bending devices, three auxiliary pulling devices and a pulling device.
- the picture is similar.
- a part of the total traction force is expended, including the traction force of the auxiliary pulling device 3 and the part of the traction force of the auxiliary pulling device 4 and the pulling device 5 not expended on the deformation of the strip 6 in bending devices 10.
- the rest of this total traction force helps the auxiliary pulling device 2 to overcome the deformation resistance of the strip 6 in the group of bending devices 8 and 7 and the resistance of the tensioner 1.
- This remaining part of the total traction force is simultaneously the rear tension of the strip 6 included in the bending device 9.
- the amount of deformation of the strip 6 in the group of bending devices 7 and 8 is regulated by changing the ratio of the speed of its exit from this group provided by the auxiliary pulling device 2 to the speed of its entry into this group of bending devices provided by the tensioning device 1. This change is carried out in the range, the upper limit which does not exceed the maximum permissible coefficient of strip stretching in this group of bending devices. Extremely permissible is such a maximum coefficient of stretching the strip, which ensures the process of its deformation without gusts.
- the magnitude of the deformation of the strip 6 in each individual bending device 9, 10 and 1 1 is regulated by changing the ratio of the speed of its exit from the corresponding bending device to the speed of its entry into this device. Regulation is carried out in the range, the upper limit of which does not exceed its own, for each of these bending devices, the maximum allowable coefficient of strip stretching.
- Band exit speed each bending device 9, 10 and 1 1 is controlled using, respectively, auxiliary pulling devices 3 and 4 and the pulling device 5.
- the speed of entry of the strip into each bending device 9, 10 and 1 1 is controlled using auxiliary pulling devices, respectively, 2, 3 and 4.
- the total value of the deformation of the continuous source strip is controlled so that after deformation to obtain a predetermined thickness regardless of the longitudinal thickness difference of the source strip.
- auxiliary pulling device 2 Using the auxiliary pulling device 2, a constant exit speed of the strip 6 from the group bending device 8 is provided, and with the help of the tensioning device 1, the entry speed of the strip 6 into the bending device 7 of the group is controlled depending on the thickness of the initial strip at the entrance to this bending device. This regulation is carried out so that the thickness of the strip at the outlet of the bending device 8 of the group is constant regardless of the initial longitudinal thickness difference of the strip.
- the ratio of the speed of the strip 6 from the bending device 8 to the speed of its entry into the bending device 7 is provided in a range whose upper limit does not exceed the maximum allowable stretch coefficient of the strip 6 in the group of bending devices 7 and 8.
- auxiliary pulling devices 3, 4 and pulling device 5 they provide their constant level of exit speed of strip 6 from each of the other individual bending devices, respectively, 9, 10 and 1 1, at which its draw coefficient in each of them will not exceed its maximum allowable value.
- the indicated levels of strip speed are selected so as to provide a common coefficient of strip stretch in all bending machines. devices 7, 8, 9, 10 and 1 1 sufficient to obtain the required thickness of the finished strip.
- the strip deformation When the strip was deformed by the proposed method with its pulling through a group of bending devices consisting of two devices, and through each of three separate bending devices, the strip deformation, measured by its elongation, according to the experiment, increased 4.4 times compared to the prototype with an increase total energy consumption by 1.6 times, and the specific energy consumption per unit of deformation of the strip decreased by 2.8 times.
- the proposed method of cold deformation of a continuous metal strip will provide, compared with the prototype, an increase of several times the magnitude of the deformation of the strip and a several-fold decrease in the specific energy consumption for its deformation. Due to this, the method can be used instead of cold rolling a metal strip.
- Using the proposed method instead of cold rolling a metal strip will reduce capital costs for the purchase of equipment and the construction of an installation for deformation of the strip, significantly reduce the wear of the deforming tool, reduce the surface roughness of the strip, increase the accuracy of the strip in thickness and reduce the energy consumption for its deformation.
- the metal pressure on the rolls during its cold rolling is approximately 5-8 times higher than the metal pressure on the extreme rollers of the bending device during its cold deformation by the proposed method. Therefore, the mass of equipment installation for cold deformation of a continuous metal strip according to the proposed method will be in several times less than the mass of equipment of a continuous rolling mill for its cold rolling. Accordingly, the cost of equipment and the cost of building such a facility will be several times lower compared to the cost of equipment and the cost of building a continuous rolling mill.
- the rollers of each bending device create two deformation zones, which are located in zones of changing the direction of the bending of the strip.
- the strip undergoes shear deformation practically without slipping relative to the rollers.
- the absence of slippage of the strip relative to the rollers and the reduced specific pressure of the metal on the rollers will allow tens of times to reduce their wear compared to the wear of the rolls during cold rolling of the strip. This will also provide a low surface roughness of the strip. This is especially true for the surface in contact with the middle rollers of the bending devices, since the middle rollers have a small diameter and therefore will provide a good study of the surface of the strip.
- the methods used in the technique provide high accuracy in controlling the speed of drives. Therefore, the regulation of the deformation of the strip by adjusting the speed of the drives of the tensioner, auxiliary pulling devices and the pulling device will provide high accuracy of the deformation of the strip in the bending devices and, therefore, will ensure high precision manufacturing strip in thickness. It is known that with the same strain parameters of the same strip by different methods, the minimum energy consumption occurs when applying the shear strain method, which is used in the proposed method. In addition, in the proposed method of deformation of the strip there is no slippage of the deformable metal relative to the rollers, which does not require energy consumption to overcome the friction forces arising in the presence of such slippage that occurs during rolling of the strip.
- the proposed method for cold deformation of a continuous metal strip will reduce, by about 15-35%, the energy consumption for its deformation.
- the magnitude of the reduction in energy consumption is greater, the smaller the diameter of the middle rollers of the bending devices and the more, to the optimum limit, the number of bending devices in their group located in the area between the tensioner and the first auxiliary pulling device.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12881842.4A EP2878391A4 (en) | 2012-07-27 | 2012-07-27 | COLD DEFORMATION METHOD OF UNINTERRUPTED METAL STRIP |
PCT/RU2012/000615 WO2014017944A1 (ru) | 2012-07-27 | 2012-07-27 | Способ холодной деформации непрерывной металлической полосы |
RU2013147504/02A RU2557843C2 (ru) | 2012-07-27 | 2012-07-27 | Способ холодной деформации непрерывной металлической полосы |
US14/605,448 US20150135790A1 (en) | 2012-07-27 | 2015-01-26 | Method for the Cold Deformation of a Continuous Metal Strip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/RU2012/000615 WO2014017944A1 (ru) | 2012-07-27 | 2012-07-27 | Способ холодной деформации непрерывной металлической полосы |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/605,448 Continuation US20150135790A1 (en) | 2012-07-27 | 2015-01-26 | Method for the Cold Deformation of a Continuous Metal Strip |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014017944A1 true WO2014017944A1 (ru) | 2014-01-30 |
Family
ID=49997625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2012/000615 WO2014017944A1 (ru) | 2012-07-27 | 2012-07-27 | Способ холодной деформации непрерывной металлической полосы |
Country Status (4)
Country | Link |
---|---|
US (1) | US20150135790A1 (ru) |
EP (1) | EP2878391A4 (ru) |
RU (1) | RU2557843C2 (ru) |
WO (1) | WO2014017944A1 (ru) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU1839118C (ru) * | 1989-06-08 | 1993-12-30 | Чел бинский политехнический институт им.Ленинского комсомола | Способ прокатки металлической полосы |
RU1429410C (ru) * | 1987-02-13 | 1994-10-15 | Уральский научно-исследовательский институт трубной промышленности | Способ производства труб на непрерывных трубоэлектросварочных агрегатах |
US5704237A (en) * | 1995-03-14 | 1998-01-06 | Bwg Bergwerk- Und Walzwerk- Maschinenbau Gmbh | Apparatus for continuously leveling thin metal strip |
RU2351423C2 (ru) * | 2007-03-06 | 2009-04-10 | Открытое акционерное общество "Северский трубный завод" | Способ изготовления труб на непрерывных трубосварочных агрегатах |
RU2412016C1 (ru) | 2010-03-01 | 2011-02-20 | Открытое акционерное общество "Северский трубный завод" | Способ изготовления труб на непрерывных трубосварочных агрегатах |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2332796A (en) * | 1941-01-25 | 1943-10-26 | Carnegie Illinois Steel Corp | Reduction of elongated bodies |
US3559431A (en) * | 1968-02-15 | 1971-02-02 | Bwg Bergwerk Walzwerk | Apparatus for stretching continuous bands |
AT314453B (de) * | 1971-07-09 | 1974-04-10 | Bwg Bergwerk Und Walzwek Masch | Verfahren und Vorrichtung zum Reduzieren von Blechbändern in Bandstraßen |
EP0171732B1 (en) * | 1984-08-10 | 1990-10-17 | Kabushiki Kaisha Toshiba | Thickness control method and system for a single-stand/multi-pass rolling mill |
FR2715592B1 (fr) * | 1994-02-01 | 1996-04-12 | Clecim Sa | Procédé et installation de planage d'une bande métallique mince. |
JP3590288B2 (ja) * | 1999-02-15 | 2004-11-17 | 住友重機械工業株式会社 | 帯板のレベリング方法およびレベリング装置 |
DE10342798B3 (de) * | 2003-09-16 | 2005-03-10 | Siemens Ag | Bandzugregelung in einer Behandlungslinie für Materialband, insbesondere Metallband |
JP3918132B1 (ja) * | 2006-03-24 | 2007-05-23 | 株式会社アスク | 伸線機と伸線方法 |
DE102008045340A1 (de) * | 2008-09-01 | 2010-03-04 | Siemens Aktiengesellschaft | Betriebsverfahren für einen Streckrichter mit überlagerter Elongationsregelung und unterlagerter Zugregelung |
-
2012
- 2012-07-27 RU RU2013147504/02A patent/RU2557843C2/ru not_active IP Right Cessation
- 2012-07-27 WO PCT/RU2012/000615 patent/WO2014017944A1/ru active Application Filing
- 2012-07-27 EP EP12881842.4A patent/EP2878391A4/en not_active Withdrawn
-
2015
- 2015-01-26 US US14/605,448 patent/US20150135790A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU1429410C (ru) * | 1987-02-13 | 1994-10-15 | Уральский научно-исследовательский институт трубной промышленности | Способ производства труб на непрерывных трубоэлектросварочных агрегатах |
RU1839118C (ru) * | 1989-06-08 | 1993-12-30 | Чел бинский политехнический институт им.Ленинского комсомола | Способ прокатки металлической полосы |
US5704237A (en) * | 1995-03-14 | 1998-01-06 | Bwg Bergwerk- Und Walzwerk- Maschinenbau Gmbh | Apparatus for continuously leveling thin metal strip |
RU2351423C2 (ru) * | 2007-03-06 | 2009-04-10 | Открытое акционерное общество "Северский трубный завод" | Способ изготовления труб на непрерывных трубосварочных агрегатах |
RU2412016C1 (ru) | 2010-03-01 | 2011-02-20 | Открытое акционерное общество "Северский трубный завод" | Способ изготовления труб на непрерывных трубосварочных агрегатах |
Non-Patent Citations (2)
Title |
---|
See also references of EP2878391A4 * |
USSR CERTIFICATE OF AUTHORSHIP 1500405, 15 August 1989 (1989-08-15) |
Also Published As
Publication number | Publication date |
---|---|
US20150135790A1 (en) | 2015-05-21 |
EP2878391A1 (en) | 2015-06-03 |
RU2013147504A (ru) | 2015-04-27 |
EP2878391A4 (en) | 2016-03-30 |
RU2557843C2 (ru) | 2015-07-27 |
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