US3896653A - Method for producing differential thickness steel plate - Google Patents

Method for producing differential thickness steel plate Download PDF

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Publication number
US3896653A
US3896653A US289167A US28916772A US3896653A US 3896653 A US3896653 A US 3896653A US 289167 A US289167 A US 289167A US 28916772 A US28916772 A US 28916772A US 3896653 A US3896653 A US 3896653A
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United States
Prior art keywords
rolling
steel plate
thickness
steel material
differential thickness
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Expired - Lifetime
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US289167A
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English (en)
Inventor
Kazuo Sakai
Ken Iwanaga
Kazuo Maehara
Tsuyoshi Nakajima
Koki Yotsuya
Humio Ookuma
Takeo Baba
Toshitaka Yamanaka
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Nippon Steel Corp
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Nippon Steel Corp
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Publication date
Priority claimed from JP7288771A external-priority patent/JPS5024898B2/ja
Priority claimed from JP7288671A external-priority patent/JPS5036826B2/ja
Priority claimed from JP8529971U external-priority patent/JPS5121086Y2/ja
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Application granted granted Critical
Publication of US3896653A publication Critical patent/US3896653A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • 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
    • B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B1/026—Rolling
    • 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
    • B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling

Definitions

  • I ABSTRACT A method for producing a differential thickness steel plate having a step portion at least on one side by hot rolling a steel material comprising reversing the hot rolling at the half-way region of the steel material and effecting the rolling with a finishing temperature in a temperature range of 680 to 1050C.
  • the process for butting the contact edges is required not only to maintain the gap for butting at the beveling portions but also to adjust and secure carefully, for instance, the linear property, surface smoothness, and right angle of edges of thick steel plate to be seamed.
  • Thick steel plates to be welded together have to be arranged to the fitting position with the aid of a machine tool such as a jack or crane, since the plates to be fitted are rather heavy and, in addition, high technical skill anda fairly long time for the fitting operation is required.
  • the reinforcement has to be previously worked on the fitting surface thereof to form a common shape to the stepped portion of the steel plate, if the surface of the steel plate to be welded with a reinforcement is formed in a stepped plane.
  • a reversing operation is required for a thick steel plate of huge dimension, in case a thick steel plate is welded and a reinforcement is given to the flat welding portion of the back surface, and the stepped thick steel plate is turned over.
  • the method has been found to be extremely difficult and costwasting at the present stage of industrial production because of the necessity of technical developments, such as automatic mechanical control for thickness of rolled plate.
  • the present invention is to provide a novel and industrially excellent method, while eliminating the abovementioned drawbacks, for manufacturing differential thickness hot rolled steel plate.
  • a differential thickness steel plate having a step portion at least on one side, by hot rolling a steel material comprising reversing the hot rolling at a half way point of rolling steel material and effecting the rolling at a finishing temperature in the temperature range of 680 to 1050C.
  • FIGS. 1-3 are diagrams respectively showing hot rolling of steel plate treated by biting-in the tail end portions for producing of a differential thickness steel plate with steps on both surfaces thereof, according to the present invention.
  • FIGS. 4-7 are diagrams, respectively, showing hot rolling of steel plate by biting-in the front end portions for producing a differential thickness steel plate with steps on both surface thereof according to the present invention.
  • FIG. 8 shows hot rolling of steel plate by biting-in the tail end portions as well as flat rolling on the lower surface of rolled surfaces by means of a table roller for producing a differential thickness steel plate with steps on one surface thereof according to the present invention.
  • FIGS. 9 and 10 show flat rolling of the lower surface of the rolled surfaces by means of a table roller by biting-in the front end portions of steel plate for producing a differential thickness steel plate with steps on one surface thereof according to the present invention.
  • FIGS. 11a lle, l2 and 13 are schematic sketches respectively show a rolling control device applicable in carrying out the manufacturing process of steel plate according to the present invention.
  • FIG. 14 shows an example of a differential thickness steel plate with steps on one surface thereof manufactured according to the present invention.
  • the present invention is characterised in that after the finishing rolling operation for rolling conventional thickness plate, a differential thickness rolling operation is carried out while the steel plate rolled in the finishing rolling process is kept at a temperature higher than that of the hot rolling operation, and the rolling operation is carried on from the end portion of the steel plate, and subsequently, reversing of the rolling mill taken place at the midway point of the steel plate for rolling it in the reverse direction so as to begin the rolling by biting-in the end portion of the steel plate for producing a differential thickness hot rolled steel plate.
  • One of the features of the present invention lies in connection with the method of manufacturing differential thickness steel plate (steel plate with a stepped portion) by means of a half-way reversing hot rolling process.
  • the following three processes have hitherto been proposed.
  • One of them is a half-way biting-in process
  • the second one is a half-way fin meshing process
  • the third one of which is a half-way roll gap process.
  • the first two processes are not favorable due to a prolongation in discontinued period of the roll, which causes a fire crack on the roll in contact with hot rolled steel plate during the discontinued period, or decreased efficiency of production through the forming of an empty path, and furthermore lack of protection for bearings of the roll.
  • the present invention is characterized in that the finishing temperature of the steel plate is maintained, at the lowest, between 680 to I050C. Namely, in case of producing the differential thickness steel plate having a step on both sides, the half-way reverse rolling is effected at a finishing temperature between 680 and 850C. In case of producing the differential thickness steel plate having a step only on one side, the plate is subjected to the reverse rolling at a finishing temperature between 850 and 1050C.
  • Thick steel plate 1 is displaced at the bitingout side 2" of the rolls 2 to be bit in at the tail end portion 1' of the steel plate 1 for rolling the steel plate 1 of a desired length, and treated by the half-way reversing rolling process. Thereby the steel plate is rolled through the hot rolling mill 2 into a form of a stepped steel plate 3.
  • a roughly rolled steel plate 4 is fed subsequently for the finishing rolling and stands by at the bite-in side 2 of the hot finishing rolling mill 2, and then is immediately put under the finishing rolling operation.
  • the reason for limiting the finishing temperature of the steel plate between 680 and 850C is that below 850C it is difficult to effect the finish rolling while above 850C the thin portion droops down and thus it is difficult to obtain a step portion on both side of the steel plate.
  • the preferable finishing temperature range is 750 to 850C.
  • An ordinary steel slab having 2,000mm in width, 150mm in thickness and 3,000mm in length is heated in a continuous heating furnace to a temperature of l,250C and is extracted from the furnace to be placed on a roller table.
  • the hot slab thus obtained is treated through a scale breaker to be removed of scale, then rolled into a thick plate product (roughly rolled steel plate 4 to be treated by a finishing rolling roll) having 2,500-mm width, -mm thickness and 4,200-mm length by means of a four-high reversing rough rolling mill, subsequently being subjected to a finishing rolling by means of a four-high reversing finishing rolling mill 2 into a thick plate 1 having 2,500-mm width, l9-mm thickness and l8-m length.
  • the aforementioned hot thick plate 1 was subjected to the half-way reversing rolling process by means of the four-high reversing mill 2.
  • the thick plate 1 having 19-mm thickness is placed by the outlet 2" of the finishing rolling mill so as to be treated by the half-way reversing rolling.
  • the finishing rolling mill is set in such a manner that the work roll 2-1 is provided with a gap having 13.3-mm clearance, and the work roll has 30 rpm. rotating rate and 4,000 tons reduction force. thus the product is bit-in, then comparing the pulses from a pulse generator connected with a mill motor of the work roll 2-1 with reference pulse having a standard length for the half-way reversing, and when the number of pulses are equivalent to each other, a control signal for reversing the work roll is emitted.
  • the rotating rate of the work roll is increased at the position of 8 m from the bit-in end without variation in a roll gap reverse rolling.
  • the final finishing temperature of 800C is obtained and the rolling operation is completed in two passes.
  • the thinner portion 3" having even thickness of l4-mm thickness (said thinner portion having 8,000-mm plate length from the starting end of the step) as well as a steel plate with the thicker portion 3" having l9-mm plate thickness (said thicker portion 3" having 12,000-mm plate length from the starting end of steps forming a are shaped taper part of 500-mm radius 3' nearly at the center of the plate.
  • the product was corrected by a hot levelling machine and was cooled on a cooling floor, and then cut in a predetermined dimension.
  • 2 is the hot rolling roll
  • Us a material to be rolled
  • 3 is a thick portion
  • 3 is a step portion between the thick portion and a thin portion
  • 5 is a roller table
  • 6 is a roll of the roller table.
  • FIGS. 4 to 7 the right side of the hot rolling roll 2 is the outlet side 2" and the left side is the inlet side 2.
  • step portions 3' are produced on the back and front surfaces of the steel plate I and the thin portion 3" and the thick portion 3 are produced on the outlet side and the inlet side respectively.
  • the material is rolled from its one end and in the course of the rolling, the rotation of the work roll 2-1 of the finishing hot rolling mill is reversed and the bite-in end for the differential thickness rolling is used as the bite-out end so that the starting section of the step portion has a arc-like taper 3' corresponding to the arc of the rolling roll and apart from this taper section the thick portion 3 having substantially no thickness difference continues. Therefore, in the differential thickness plate produced by the halfway reversing rolling method of the present invention, the step portion or the starting point of the thickness difference can be clearly observed by the naked eye and it is possible to obtain final products accurately meeting sizes specified by users.
  • the halfway reversing rolling is divided in stepwise to delay the starting point of the reversing in the lengthwise direction.
  • differential thickness plates having up to three or four stcp portions can be obtained.
  • the material to be rolled by the present invention may be special steels so far as no welding problem exists.
  • the differential thickness plate produced by the present invention is mostly 4.8180-mm in thickness in the thin portion, 8200-mm in thickness in the thick portion and the radial length at the arc tapered portion is about 500mm, the thickness difference between the thick portion and the thin portion is 01-20mm, the
  • the thickness ratio of the thick portion to the thick portion is l 0.3 or more, and when the condition of thickness difference 0.1-20mm is satisfied, very excellent results are obtained in mechanical strength and other properties.
  • the step portion extends in an arc like taper, not only a very beautiful shape and excelleht functional fitness are obtained, but also there is no concentration of stress in the product, there is no chance of deposition of dust, or rust formation and thus very excellent advantages are obtained in view of rust prevention and strength improvement.
  • the finishing temperature of the differential thickness rolling is maintained'between 850-1050C (not including 850C) so that one of the rolled surfaces is almost flat and the other rolled surface has a step or tapered portion.
  • the differential thickness steel plate according to the present invention is obtained by maintaining the finishing temperature between 850 and 1050C after the material is rolled by the rolling method shown in FIGS. 1 to 3 or FIGS. 4 to 7 and by transfering the rolled steel plate on the roller table, for example to flatten the plate surface contacting the roller table.
  • the differential thickness steel plate 3 having step portions on both sides is transferred on the roller table with the thicker portion ahead.
  • the thin portion 3" of the steel plate 3 droop down by its gravity and contacts the roller 5 and the step portion 3' also droops down by its gravity so that the lower rolled surfaces of the thick'portion, the step portion and the thin portion makes alflat line.
  • a differential thickness steel platelhaving a step portion on one side is obtained.
  • the step portion on the back side of the steel plate 3 having step portions on both sides finished at a temperature between 850 and 1050C is made flat during the transfering the steel plate withthe thin portion ahead on the roller table, contacting a number of rollers on the step portion.
  • a differential thickness steel plate having a step portion 3' on the upper side but no step portion on the back side as shown in FIG. 10 is obtained.
  • the reason for limiting the finishing temperature of the steel plate between 850 and 1050C for the production of a differential thickness steel plate having a step only on one side is that below 850C the thin portion droops down and the flattening of the lower side by the roller table is not satisfactory while above 1050C the material qualities of the steel plate are deteriorated.
  • the preferred finishing temperature is between 900 and 950C.
  • FIG. 14 One preferable example of the differential thickness steel plate having a step on one side according to the present invention is illustrated FIG. 14.
  • the arc tapered portion 11 is positioned at a position between one-fourth and threefourths of the total length of the plate.
  • the right and left portions to the tapered portion I I are respectively a thin portion 13 and a thick portion 12.
  • the thickness rate of the thin portion (13) to the thick portion 12 is l l.2 to 1.5. Abovethis ratio, the rolling operation will be difficult.
  • the most preferred thickness ratio is 3 4, and a pre' ferred thickness difference between the thin portion and the thick portion is 0.1 mm. In practical application, it is desirable if the thickness of the thin portion is 4.8 to 180mm with the above thickness difference and ratio.
  • the bending radius of the are tapered portion is 400 to 600mm.
  • the continuation from the flat portion of the thick portion to the tapered portion is bordered by a converting point 14. This converting point 14 is very useful for measuring the length of the thin portion.
  • FIGS. 11 to 13 show an embodiment of controlling in a rolling the differential thickness steel plate having a step portion on both sides by biting-in of the tail end of the steel plate.
  • the drawing shows that in a steel plate SL of H, in thickness and l in length, the thickness of one side becomes H,-, through H and the length 1 becomes L, I, through the condition of 1 l, and thus, a differential thickness hot-rolled steel plate SL, having the thickness of H, H,, and the length of l, I is manufactured.
  • the initial data, necessary for a differential thickness rolling, are memorized in a computer by any process (for example, data transmission, cord paper tape, etc.
  • the dimensions of finished goods, shown by in FIG. llc, namely, the thickness H,, H;,, the length l,, l,, and the width W are given numbers. Therefore, the screw value S and the length 1 can be obtained in the following manner.
  • the known values are H,, H,,, l,, and l
  • the unknown values are H 1 F,, F and S.
  • F is a rolling reaction force at the time of b and F a rolling reaction force at the time of d.
  • T is the temperature of a steel plate, measured by a thermometer, or the temperature, estimated on the basis of the previous pass. T is the temperature, obtained by calculation of the amount of temperature drop from T,.
  • the thickness H is substituted in the equation (III) to get the rolling reaction force F,.
  • F is substituted in the equation (I) to get the screw value S.
  • FIG. 12 shows an example of the apparatus, by which a differential thickness hot-rolled steel plate is actually manufactured in utilization of these numbers.
  • R is a roll ofa reversible rolling mill
  • PS a preset device for performing a screw setting S
  • SCI and 8C2 sequence circuits, despatching the commands of the table normal or reverse rotation TFR and the mill normal or reverse rotation MFR
  • CPU a computer
  • PS a button for ordering the differential thickness rolling
  • LC a load cell
  • PLG a mill rotation meter
  • TM thermometer'
  • LD a length indicator
  • a steel plate is first rolled by an ordinary rolling process till it gets the thickness H,, and is placed on the rear surface of the mill, as shown by (a) in FIG. 11.
  • the button PS for ordering the differential thickness rolling is pushed by a roll operator or the code for instruction of the differential thickness rolling is put in beforehand. So, the screw value S and the length 1 are calculated by the computer CPU on the basis of the temperature, actually measured by the thermometer, in consideration of the next pass, performing the differential thickness rolling.
  • the screw is set to S and the mill table is so rotated that the steel plate is bitten by the mill.
  • the steel plate SL is bitten by the mill, it is started on an ON signal of the load cell LC to count the rotation of the mill through the output of the mill rotation meter PLG.
  • the rotation reaches the equivalent amount of the length l the mill table is reversely rotated and the steel plate SL is taken out of engagement.
  • the desired point distant from the centre of the mill by the length of the thick part of the plate, is illuminated by a photo-indicator.
  • the mill is reversely rotated and the steel plate SL is taken out of engagement.
  • the hot-rolled steel plate of the prescribed differential thickness can be obtained.
  • the length 1 and the measured value l; are indicated by the indicator LD, so that the actual result of rolling can be discerned.
  • FIG. 13 shows an embodiment example. in which the rolling is manually carried out by a roll operator in response to the indication of the computer.
  • an ordinary rolling is carried out till it becomes in the condition. shown by (a) in FIG. ll.
  • the computer CPU measures the temperature of the steel plate and calculates the length 1 Starting on the ON signal of the load cell, the rotation of the mill is counted.
  • the reversal timing is advised to the roll operator by the indicator LD for instruction of the mill reverse rotation.
  • the mill reverse rotation is detected by the rotation switching signal of the mill turning machine MRS.
  • the measured lengths l l are indicated in the indicator LD to advise the roll operator the actual result of rolling.
  • the indicating device LD for instruction of the mill reverse rotation there may be enumerated such as an analog indicator, for which there are used the pulses of the mill rotation number. starting on the starting signal of the computer, or a lamp indicator, provided with several lamps to indicate at suitable intervals for instruction of the timing of reverse rotation.
  • the command from the memory of the computer may be used instead of pushing the button for ordering the differential thickness rolling.
  • the screw value is indicated in the indicator LD,.
  • the screw value S and the length 1 are calculated by the computer to despatch the command of setting and reverse rotation. so that the plate thickness H and the length L, can be determined very exactly. Namely, when the steel plate is pulled out by the reverse rotation of the mill, the screw value is not changed. But, the rolling is con tinued at that time.
  • the plate thickness is reduced from H: to H and the length of the steel plate is stretched from 1 to 1
  • the differences AH H H and AI l 1 are cited as an instance. as follows: If, H
  • This example relates to production of a differential thickness steel plate 14mm thick in the thin portion. and 17mm thick in the thick portion and 9.800-mm length in the thin portion and 6500-mm length in the thick portion.
  • the molten steel having the following composition was prepared in a converter and cast into slabs of 210- mm thickness, 1,900-mm width and 2,700-mm length by a continuous casting.
  • the slabs were heated to [260C in a continuous heating furnace.
  • the slabs taken out of the heating furnace were transferred on a roller table and removed of surface scales, and rolled by a reversible four-high rough rolling mill to a size of 7 l-mm thickness and 3,260-mm width.
  • These rough rolled materials were further rolled in a finishing rolling mill.
  • the finish rolling mill first the material was rolled into a plate thickness in the thick portion, and then the screw value was set at 13.0 m/m to bite in the material with the thin portion ahead at a mill speed of 0.9 m/sec. and at a predetermined plate length, the mill was reversed with the screw fixed. In this case the accuracy of the plate thickness was determined by a standard deviation (between the actual thickness and the aimed thickness). The results showed very good accuracy as compared with that of the ordinary rolling.
  • the rolling was done by one back and forth rolling, but in case of a larger thickness difference where larger reduction force is required, the rolling may be done in two or three back and forth rollings.
  • the differential thickness steel plate was thus attained at a spped of 150 m/sec. transferred on a m length roller table having rollers of 400mm diameter, 4,700mm length and 900mm roller pitch. During the transferring on the roller table the lower side of the differential thickness steel plate was flattened. Then the plate was subjected to a hot leveller to adjust the shape and cooled on a cooling floor.
  • a method for producing a differential thickness steel plate having a step portion at least on one side by hot rolling a steel material through a rolling mill comprising adjusting the rollers of the rolling mill to a preset roll gap, conveying the steel material to the rolling mill, rolling the steel material commencing with an end thereof in the rolling mill, reversing the direction of rolling of the steel material after a specific portion thereof has been rolled, and finishing said rolling with a temperature range of 680 to lO50C whereby a differential thickness steel plate is formed.
  • a method according to claim I wherein said temperature range is between 850 and lO50C, and said step of finishing said rolling comprises forming a step portion on only one side of the steel material and a flat, continuous portion on the other side thereof.
  • said step of finishing comprises transferring the steel plate to a roller table so to form a differential steel plate with a step portion on only one side thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
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US289167A 1971-09-18 1972-09-14 Method for producing differential thickness steel plate Expired - Lifetime US3896653A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP7288771A JPS5024898B2 (de) 1971-09-18 1971-09-18
JP7288671A JPS5036826B2 (de) 1971-09-18 1971-09-18
JP8529971U JPS5121086Y2 (de) 1971-09-18 1971-09-18
JP46097161A JPS5024899B2 (de) 1971-09-18 1971-12-03
JP47055868A JPS5145545B2 (de) 1971-09-18 1972-06-05

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US3896653A true US3896653A (en) 1975-07-29

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US (1) US3896653A (de)
JP (2) JPS5024899B2 (de)
DE (1) DE2245650C3 (de)
FR (1) FR2153095B1 (de)
GB (1) GB1401475A (de)
IT (1) IT967571B (de)
SE (1) SE411710B (de)

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US4793169A (en) * 1986-06-27 1988-12-27 United Engineering, Inc. Continuous backpass rolling mill
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US6536254B1 (en) * 1998-10-12 2003-03-25 Thyssen Krupp Ag Method and device for producing a metal strip for tailored blanks to be cut to length
US20050244667A1 (en) * 2004-04-19 2005-11-03 Andreas Hauger Hybrid-produced sheet metal element and method of producing same
US7334446B1 (en) * 2000-05-11 2008-02-26 Bauder Hans-Joerg Method for producing a striplike pre-material made of metal, especially a pre-material which has been profiled into regularly reoccurring sections, and device therefor
US20090314049A1 (en) * 2006-07-24 2009-12-24 Masaharu Ueda Method for producing pearlitic rail excellent in wear resistance and ductility
CN102688901A (zh) * 2012-06-13 2012-09-26 鞍钢股份有限公司 一种08Mn钢板板形控制的方法
CN106061635A (zh) * 2013-09-24 2016-10-26 首要金属科技德国有限责任公司 轧制方法
CN106311795A (zh) * 2016-08-28 2017-01-11 葫芦岛市北方金属制品有限公司 预应力钢棒生产线
US10526680B2 (en) 2014-01-17 2020-01-07 Aperam Method for manufacturing a strip having a variable thickness and associated strip
US11162254B2 (en) * 2017-02-17 2021-11-02 Sdr Technology Co., Ltd. Method for manufacturing column-beam joint structure and the column-beam joint structure
CN113664046A (zh) * 2021-08-13 2021-11-19 南京钢铁股份有限公司 一种提高高合金钢板厚度命中率的方法

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JPS59232606A (ja) * 1983-06-15 1984-12-27 Kawasaki Steel Corp 鋼板の製造方法
JPS6037201A (ja) * 1983-08-08 1985-02-26 Kawasaki Steel Corp 厚板の差厚圧延方法
JPS6061106A (ja) * 1983-09-16 1985-04-08 Kawasaki Steel Corp 異厚鋼板の圧延方法
DE4231213C2 (de) * 1992-09-18 1997-04-03 Benteler Werke Ag Verfahren zum Herstellen eines trägerartigen Formkörpers
DE19704300B4 (de) * 1997-02-06 2008-07-10 Benteler Ag Verfahren zur Herstellung von Platinen mit unterschiedlichen Dicken
DE10041280C2 (de) * 2000-08-22 2003-03-06 Muhr & Bender Kg Verfahren und Vorrichtung zum flexiblen Walzen eines Metallbandes
DE10041281C2 (de) * 2000-08-22 2002-07-11 Muhr & Bender Kg Vorrichtung zum Umformen von Platinen aus flexibel gewalztem Metallband
JP4395765B2 (ja) * 2005-03-30 2010-01-13 住友金属工業株式会社 差厚鋼板の製造方法
DE102006011939A1 (de) * 2006-03-15 2007-09-27 Siemens Ag Walzverfahren für ein Walzgut zum Einbringen einer Stufe in das Walzgut
DE102011009891A1 (de) 2011-01-31 2012-08-02 Benteler Automobiltechnik Gmbh Verfahren zum Herstellen von Blechbauteilen sowie Vorrichtung zur Durchführung des Verfahrens
DE102011009890A1 (de) 2011-01-31 2012-08-02 Benteler Automobiltechnik Gmbh Verfahren zum Herstellen von Blechbauteilen und Umformwerkzeug
DE102013100302B4 (de) * 2013-01-11 2017-02-02 Langenstein & Schemann Gmbh Verfahren zum Schmieden, insbesondere Streckschmieden, von metallischen Werkstücken
KR102233112B1 (ko) * 2019-07-25 2021-03-29 한국원자력의학원 액체 타겟을 이용한 핵종 생산 장치

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US499677A (en) * 1893-06-13 And condensing jars of metal
US1384485A (en) * 1918-09-25 1921-07-12 Detroit Pressed Steel Co Method of forming axle-housings
US1777728A (en) * 1928-02-25 1930-10-07 Berger Brothers Co Mechanism for crimping leader pipe
US2161065A (en) * 1936-12-02 1939-06-06 Frank R Krause Apparatus for reducing tubular blanks
US2701976A (en) * 1952-04-17 1955-02-15 Mckay Machine Co Apparatus for pointing bars and the like
US2775152A (en) * 1955-07-06 1956-12-25 Mckay Machine Co Apparatus for tapering the ends of spring leaves and the like
US3611775A (en) * 1969-07-29 1971-10-12 Superior Tube Co Tube rolling mill with a tapered mandrel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US499677A (en) * 1893-06-13 And condensing jars of metal
US1384485A (en) * 1918-09-25 1921-07-12 Detroit Pressed Steel Co Method of forming axle-housings
US1777728A (en) * 1928-02-25 1930-10-07 Berger Brothers Co Mechanism for crimping leader pipe
US2161065A (en) * 1936-12-02 1939-06-06 Frank R Krause Apparatus for reducing tubular blanks
US2701976A (en) * 1952-04-17 1955-02-15 Mckay Machine Co Apparatus for pointing bars and the like
US2775152A (en) * 1955-07-06 1956-12-25 Mckay Machine Co Apparatus for tapering the ends of spring leaves and the like
US3611775A (en) * 1969-07-29 1971-10-12 Superior Tube Co Tube rolling mill with a tapered mandrel

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793169A (en) * 1986-06-27 1988-12-27 United Engineering, Inc. Continuous backpass rolling mill
US6536254B1 (en) * 1998-10-12 2003-03-25 Thyssen Krupp Ag Method and device for producing a metal strip for tailored blanks to be cut to length
EP1069192A2 (de) * 1999-07-15 2001-01-17 Thyssen Krupp Stahl AG Verfahren zum Herstellen eines Bandes aus Stahl durch flexibles Walzen
EP1069192A3 (de) * 1999-07-15 2004-06-02 ThyssenKrupp Stahl AG Verfahren zum Herstellen eines Bandes aus Stahl durch flexibles Walzen
US7334446B1 (en) * 2000-05-11 2008-02-26 Bauder Hans-Joerg Method for producing a striplike pre-material made of metal, especially a pre-material which has been profiled into regularly reoccurring sections, and device therefor
US20050244667A1 (en) * 2004-04-19 2005-11-03 Andreas Hauger Hybrid-produced sheet metal element and method of producing same
US20090314049A1 (en) * 2006-07-24 2009-12-24 Masaharu Ueda Method for producing pearlitic rail excellent in wear resistance and ductility
US8210019B2 (en) * 2006-07-24 2012-07-03 Nippon Steel Corporation Method for producing pearlitic rail excellent in wear resistance and ductility
CN102688901A (zh) * 2012-06-13 2012-09-26 鞍钢股份有限公司 一种08Mn钢板板形控制的方法
CN102688901B (zh) * 2012-06-13 2014-06-04 鞍钢股份有限公司 一种08Mn钢板板形控制的方法
CN106061635A (zh) * 2013-09-24 2016-10-26 首要金属科技德国有限责任公司 轧制方法
US10526680B2 (en) 2014-01-17 2020-01-07 Aperam Method for manufacturing a strip having a variable thickness and associated strip
CN106311795A (zh) * 2016-08-28 2017-01-11 葫芦岛市北方金属制品有限公司 预应力钢棒生产线
US11162254B2 (en) * 2017-02-17 2021-11-02 Sdr Technology Co., Ltd. Method for manufacturing column-beam joint structure and the column-beam joint structure
CN113664046A (zh) * 2021-08-13 2021-11-19 南京钢铁股份有限公司 一种提高高合金钢板厚度命中率的方法

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Publication number Publication date
SE411710B (sv) 1980-02-04
FR2153095A1 (de) 1973-04-27
JPS4860059A (de) 1973-08-23
FR2153095B1 (de) 1977-08-26
DE2245650A1 (de) 1973-03-29
IT967571B (it) 1974-03-11
JPS4915664A (de) 1974-02-12
DE2245650B2 (de) 1979-01-11
DE2245650C3 (de) 1979-09-06
JPS5024899B2 (de) 1975-08-19
GB1401475A (en) 1975-07-16
JPS5145545B2 (de) 1976-12-04

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