EP0157575A2 - Verfahren zur Verringerung der Breite von Platten durch Pressen und Presse hierzu - Google Patents

Verfahren zur Verringerung der Breite von Platten durch Pressen und Presse hierzu Download PDF

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Publication number
EP0157575A2
EP0157575A2 EP85302071A EP85302071A EP0157575A2 EP 0157575 A2 EP0157575 A2 EP 0157575A2 EP 85302071 A EP85302071 A EP 85302071A EP 85302071 A EP85302071 A EP 85302071A EP 0157575 A2 EP0157575 A2 EP 0157575A2
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EP
European Patent Office
Prior art keywords
slab
pressing
slabs
anvils
width
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
Application number
EP85302071A
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English (en)
French (fr)
Other versions
EP0157575B1 (de
EP0157575A3 (en
EP0157575B2 (de
Inventor
Takayuki C/O Mizushima Works Naoi
Kozo C/O Mizushima Works Fujiwara
Hideo C/O Research Laboratories Abe
Toru C/O Mizushima Works Kondo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority claimed from JP59059532A external-priority patent/JPH0683841B2/ja
Priority claimed from JP59059531A external-priority patent/JPS60203303A/ja
Priority claimed from JP5953384A external-priority patent/JPS60203305A/ja
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of EP0157575A2 publication Critical patent/EP0157575A2/de
Publication of EP0157575A3 publication Critical patent/EP0157575A3/en
Publication of EP0157575B1 publication Critical patent/EP0157575B1/de
Application granted granted Critical
Publication of EP0157575B2 publication Critical patent/EP0157575B2/de
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/04—Shaping in the rough solely by forging or pressing
    • 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
    • B21B1/024—Forging or pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/20—End shape; fish tail; tongue

Definitions

  • This invention relates to a method of reducing widths of hot slabs by pressing without causing defects such as cracks and more particularly to a press for such a reduction in width of hot slabs.
  • ingots as blanks had been rolled by blooming mills to obtain slabs.
  • the slabs had been once heated in heating furnaces and thereafter rolled by strip mills.
  • continuous casting apparatuses to produce hot slabs directly without heating the slabs for the purpose of saving energy and shortening steps of production.
  • how to unify widths of castings in the continuous casting and how to reduce widths of slabs greatly have been investigated for more intimately associating the continuous casting apparatuses with hot strip mills.
  • edges of the slabs are apt to rise to exhibit "dog bones” in cross-section and extend in longitudinal directions to form "fishtails". If the slabs having such "dog bones” are rolled by horizontal rolls, the slabs increase their widths greatly so as to cancel the reduction in width by the vertical rolls, so that the energy required in the rolling by the vertical rolls is wasteful. In case of large reduction in width, moreover, it is required to pass the slabs through a number of rolling mills which would increase energy loss and lower the efficiency in production and yield rate because fishtails become large in proportion to the reduction in width.
  • the rolling of the hot slabs to reduce their widths causes considerably irregular deformations in the edges of the slabs which in turn cause great tensile stresses in centers of the slabs.
  • rolling by horizontal rolls after the reduction in width furthermore, only "dog bones" of the slabs are rolled in order to reduce the enlargement of the width in the horizontal rolling. In this case, large tensile stresses would occur in the centers of the slabs.
  • a number of rolling mills are required usually in this method, such tensile stresses would occur repeatedly, so that there is a risk of defects occurring such as cracks in surfaces and inside of the slabs which greatly lower the quality of the products.
  • This invention resides in the discovery that anvils brought into contact with hot slabs with long contacting length in reduction of width by a press make uniform the deformation in section of the slabs to remarkably reduce the tensile stresses and the enlargement in width in the following horizontal rolling is therefore small.
  • each said anvil is formed with an entrance inclined portion having an inclined angle more than 10° but less than 18° on an entrance side of the hot slabs relative to an advancing direction of the hot slabs and with a parallel portion continuous to the entrance inclined portion, and the hot slab is continuously pressed by said anvils to reduce its width to a predetermined width.
  • each the anvil is further formed with an exit inclined portion continuous to the parallel portion on an exit side of the hot slabs relative to the advancing direction of the hot slabs, and after the pressing has arrived at a location of the slab near to its trailing end, the slab is further advanced to preform the trailing end of the slab with the aid of the exit inclined portion, and thereafter the slab is once retracted and the remaining portion of the slab which has not been pressed is subjected to the pressing in the same manner as the initial pressing.
  • the remaining portion of the slab which has not been pressed is pressed to reduce the width with a larger minimum distance than the first mentioned minimum distance between the anvils and thereafter the slab is rolled by vertical rolls of roughing rolling mills to a desired width of the slab.
  • the press for reducing widths of hot slabs comprises a pair of anvils each formed with an inclined portion having an inclined angle more than 10° but less than 18° on an entrance side of the hot slabs relative to an advancing direction of the slabs and a parallel portion continuous to the inclined portion.
  • Each the anvil may be further formed with an exit inclined portion continuous to the parallel portion on an exit side of the hot slabs relative to the advancing direction of the hot slabs.
  • Fig. la illustrates a sectional configuration of anvils for a press for reducing widths of slabs according to the invention.
  • a hot slab 2 is transferred relatively to a pair of anvils 1 in a direction shown by an arrow R.
  • the sectional configuration of the anvils comprises an inclined portion AB on an entrance side at a predetermined angle ⁇ to the advancing direction of the slab and a parallel portion BC continuous to the inclined portion AB.
  • the pair of the anvils 1 are oscillated with an amplitude 2a (Fig. lb), while the hot slab 2 is moved to reduce its width by the press-forming.
  • Figs. 2a, 2b and 2c illustrating the principal operation for reducing the width of the slab by means of the anvils 1
  • the hot slab 2 is advanced by a distance of 2a/tan 8 in the direction R when the anvils 1 are opened (Fig. 2b).
  • the width of the hot slab 1 is reduced by the anvils when they are closed, so that the reduction areas W are press-formed with wide contact areas of the inclined and parallel portions of the anvils 1 with the hot slab 2 (Fig. 2c) to form one cycle.
  • the width of the hot slab 2 is continuously reduced from the leading end to the trailing end of the slab 1.
  • the inventors of this application have carried out the following experiments to investigate the relationship between tensile stresses and contacting areas of the anvils 1 with hot slabs 2 affecting the sectional shapes of the slabs.
  • Widths of hot slabs having widths of 1,500 mm and thicknesses of 220 mm were reduced with reduction amounts ⁇ W (initial widths of the slabs minus widths after press-formed) of 330 mm by varying the inclined angles of the anvils on the entrance side by means of the continuous width reduction press as shown in Figs. la and lb and Figs. 2a-2c.
  • Fig. 3a illustrates the relationship between the inclined angles 8 of the anvils and various parameters T/T o of sectional shapes of the reduced slabs.
  • T the thicknesses after reduction
  • T max the maximum thicknesses of the slabs
  • T c the thicknesses of the slabs at central portions
  • T e the thicknesses of the slabs at ends
  • the thicknesses T e at the ends of the slabs are smaller than the thicknesses T c at the centers.
  • the thicknesses T e at the ends of the slabs rapidly increase when the 8 is more than 18° as shown in Fig. 3a, so that the sections of the slabs become like dog bones having very large ends. Accordingly, when such pressed slabs are horizontally rolled, the centers of the slabs are subjected to large tensile stresses (3 kg/mm 2 ) as shown in Fig. 5.
  • Figs. 4 and 5 illustrate internal stresses occurring in the rolled material 2' in rolling direction: at right angles to axes of horizontal rolls 12 horizontally rolling the material 2' therebetween as shown in Fig. 6.
  • the inclined angles 8 of the anvils If the inclined angles 8 are less than 10°, the thicknesses at the centers of the slabs increase to a larger extent than that in ends of the slabs, so that the following horizontal rolling causes larger tensile forces in the ends of the slabs, which may cause cracks in the ends. If the inclined angles 6 are more than 18°, large tensile stresses occur in the centers of the slabs resulting in cracks therein. It has been found that with the inclined angles of 10° ⁇ 18°, the horizontal rolling after pressed does not cause any large tensile stresses in the slabs and in width reduction, the slabs devoid of defects can be produced.
  • Fig. 7 illustrates one example of the width sizing series including a press for reducing widths of slabs according to the invention.
  • a pair of anvils 1 are mounted slidably in a press housing 8.
  • the anvils 1 have the shape comprising inclined portions of angles 8 on an entrance side in the advancing direction (R) of hot slabs and parallel portions continuous thereto.
  • the anvils are oscillated with an amplitude 2a by means of hydraulic cylinders 9 for reducing widths of slabs.
  • Pinch rolls 10 intermittently transfer the slabs.
  • a horizontal rolling mill 1 horizontally rolls the slabs after pressed.
  • a hot slab is transferred by the pinch rolls 10 in the direction R into a space between the pair of anvils 1. Then the anvils 1 are pressed into the closed position by the hydraulic cylinders 9 to press the slab so as to reduce its width. Thereafter, while the anvils 1 are being opened, the hot slab is advanced by a predetermined pitch, and the width of the hot slab is reduced in the same manner. By repeating such an. operation the reduction in width of the slab is continuously effected and then the hot slab is horizontally rolled by means of the horizontal rolling mill 11.
  • the width sizing of hot slabs can be continuously effected with any desired widths without any defects such as cracks in surfaces and insides of slabs.
  • the invention has significant effects in accomplishing synchronization and continuity of continuous casting installations and hot rolling mills.
  • Fig. 8 illustrates deformations of trailing end of a slab with the lapse of time when anvils 13 having inclined angles ⁇ of 12° are operated with amplitudes 2a of 60 mm with reductions AW of 300 mm. As can be seen from Fig.
  • tongues do not occur at the stage where the trailing end of the slab is in the proximity of the inclined portions of the anvils 13 so as not to be pressed, tongues start to occur at the stage where the slab 14 has been advanced in the advancing direction R and its trailing end has been advanced by about one half of the width of the slab from the rear ends of the inclined portions of the anvils 13. As the slab is advanced, the tongues progressively grow.
  • a further embodiment of the invention uses a particular configuration of anvils.
  • Fig. 9 illustrate one example of such anvils each having pressing surfaces comprising an inclined portion AB on an entrance side in the advancing direction R of a hot slab 14, a paralle portion BC at an intermediate position and a further inclined portion CD on an exit side.
  • the entrance inclined portion AB is at angles 6 to the advancing direction R of the slab and the exit inclined portion CD is at angles ⁇ '.
  • the entrance inclined portion AB and parallel portion BC form pressing surfaces for forming steady deformed zones including the preceding end of the slab.
  • the exit inclined portion CD forms a pressing surface for preforming unsteady deformed zones by pressing only the trailing end of the slab.
  • a treatment of the trailing end of the slab is effected.
  • the slab is pressed to reduce its width in the above manner until the length l of the zone which has not been pressed becomes about one half of the width of the slab (Fig. 10a).
  • the anvils 13 are opened more than the initial width of the slab and the slab 14 is further advanced in the direction shown by an arrow R to bring the trailing end into a position enabling the trailing end into contact with the exit inclined portions 16 of the anvils (Fig. 10b).
  • the slab is pressed with the aid of the exit inclined portions 16 in directions shown by arrows in Fig. 10c so as to deform the trailing end of the slab into a fishtail to complete a preforming.
  • the reduction d in the preforming of the trailing end of the slab is dependent upon the reduction ⁇ W in width and the like.
  • the reduction d is preferably 0.3 ⁇ W to AW.
  • the reduction d should be determined so as to cancel the tongues at the trailing end of the slab in simply pressing over its length by the fishtail of the trailing end caused by the exit inclined portions of the anvils according to the invention.
  • the reduction d should be determined by the following equation. where original width W s of the slab, width W p of the pressed slab, Temperature T of the slab, entrance inclined angle e and exit inclined angle ⁇ '.
  • the anvils 13 are again opened more than the initial width of the slab and the slab 14 is once retracted in a direction shown by an arrow R' (Fig. 10d).
  • the trailing end is continuously pressed to reduce its width in the same manner as the reduction before the pressing the trailing end as shown in Fig. 10a until the trailing end leaves the anvils 13. In this manner, the tongues at the trailing end of the slab is minimum by the treating the end.
  • Fig. 11 illustrates one example of a press for continuously pressing slabs to reduce their widths.
  • Anvils 13 are arranged on anvil blocks 18 slidable in a frame of the press and are adapted to be oscillated by means of hydraulic cylinders 19.
  • the anvils 13 have the configuration as shown in Fig. 9.
  • the advancing direction of the slab 14 is shown by the arrow R.
  • a reference numeral 17 denotes pinch rollers for transferring the slab.
  • a slab 14 having a width W is transferred in a direction shown by an arrow R.
  • a slab detector 31 detects a preceding end of the slab, pinch rollers 30 are lowered.
  • a pulse generator 32 connected to the pinch rollers 30 is tracking the slab, the slab is pressed from the preceding end so as to reduce its width to a predetermined width W p to form a steady deformed zones.
  • a slab detector 31' detects a trailing end of the slab 14
  • pinch rollers 30' are lowered and a pulse generator 32' is tracking the trailing end.
  • the trailing end 14a arrives at an unsteady deformed zone or a position shown in phantom lines at a distance l from the points B of the anvils
  • the anvils 13 are once opened more than the initial width W s of the slab.
  • the slab is advanced by the pinch rollers 30' until the trailing end of the slab passes by the points C or the slab 14 has movable by a distance L. Thereafter the trailing end is pressed with the anvils 13 to effect the preforming of the trailing end with the reduction d.
  • the moved distance of the trailing end of the slab for the preforming may be L+x.
  • the positions of the anvils where they are stopped in movements toward each other in pressing can be calculated from the inclined angle ⁇ ' of the inclined portion CD of the anvils 13, the distance x and the reduction d.
  • the anvils 13 are opened more than the initial width W of the slab and the slab 14 s is retracted to the original position shown in the phantom lines. Then the slab is pressed to reduce the width in the same manner before the preforming of the trailing end until the trailing end 14a has been pressed between the anvils 13.
  • Fig. 9 illustrates a configuration of the slabs pressed to reduce the widths indicated by trailing end preforming plus continuous pressing.
  • slabs were uniformly pressed from their preceding ends to trailing ends without applying the preforming of the trailing ends.
  • a configuration of the slabs is shown in Fig. 9 in a line of continuous pressing.
  • the slabs treated according to the invention include only very short crops and permit only minimum tongues to occur, so that the configuration of the trailing ends of the slabs is good.
  • the slabs treated by the prior art include long crops and long tongues in their trailing ends.
  • this embodiment can produce slabs having very good configurations of their trailing ends devoid of tongues, keeping the high productivity of the width reduction technique by continuous pressing, thereby remarkably improving the yield rate of the slabs.
  • Such vertical rolls may be caliber rolls or simple cylindrical rolls or caliberless rolls with high reduction efficiencies. In both the cases, they have respective inherent disadvantages.
  • edges of a slab 41 are rolled by vertical rolls 42 as shown in Figs. 15 and 16, shearing deformations in width directions occur in the edges so as to irregularly change the shapes in plan view to produce unsteady portions called "crops" because the edges are free.
  • these crops are cut off by crop shears on termination of roughing rolling before finishing rolling. It greatly lower the yield rate of the slabs.
  • a press 43 for preforming is arranged immediately before vertical rolling mill. After preforming preceding and trailing ends of slab 41 in the form shown in Fig. 17 by the press, the slab 41 is transferred between the vertical rolls, so that the preceding and trailing ends are hardly subjected to reduction in width by the vertical rolls 42. Accordingly, the above shearing deformations are not caused and the shapes of the slabs are substantially good.
  • a vertical rolling mill for reducing the width and a press for preforming arranged immediately thereof must be arranged, so that its production line is elongated so as to increase the cost of the installation to make it difficult to realize such an installation.
  • Japanese Laid-open Patent Application No. 55-153,602 above mentioned discloses the method of preforming four corners of the slab by using vertical rolls, so that it requires to provide an exclusive vertical.rolling mill. Therefore, this method does not fundamentally solve the problem. Moreover, the extra process is required for preforming the preceding and trailing ends of slabs to remarkably lower the production efficiency.
  • the press includes as main components a pair of anvils 44 having inclined angles 8 and a pair of hydraulic cylinders 45 connected to the respective anvils for driving them.
  • a slab 41 having an original width W can be pressed to reduce the width by the anvils continuously oscillated with amplitude 2a (one anvils) and frequency f by means of the hydraulic cylinders 45.
  • the required width W of the pressed slab is substantially coincident with the minimum distance between the anvils 44 moved toward each other.
  • the slab 41 is tranferred downward by roller tables (not shown) to the position where it is to be subjected to the reduction in width.
  • the slab 41 is pressed to reduce its width by the anvils while they are being closed and is then transferred downward at a speed v while the anvils are opened.
  • the third embodiment of the invention resides in the discovery that shapes of crops are determined by deformations by pressing in conjunction with shearing deformations by vertical rolls thereafter.
  • the slab 41 in an initial stage of pressing the slab 41 is continuously pressed from its preceding end to reduce its width by anvils 44 oscillated to open and close with a predetermined minimum open distance until the reduction in width arrives in the proximity of the trailing end of the slab 41.
  • the predetermined minimum open distance is changed such that the width of the trailing end of the slab is wider than the width W of the already pressed slab.
  • the pressing of the slab is effected.
  • the configuration of the slab after completion of pressing is shown in Fig. 20 in a plan view, wherein the width of the slab at the trailing end having a length Q is W' wider than the predetermined width W of the pressed slab.
  • the trailing end of the slab forms a tongue larger than the desired end.
  • the slab is rolled in roughing rolling by vertical rolls to reduce the width of the slab, so that the fishtail due to the shearing deformations caused by the vertical rolls just cancels the tongue caused in the above pressing by the anvils, with the result that at the stage of shearing a crop in a crop shear before a final finishing rolling, the slab hardly requires to cut any crop or only requires to cut a very small crop to obtain a complete slab.
  • the trailing end is rolled to reduce its width with a predetermined reduction larger than that of the steady portion of the slab, thereby controlling the slab in a good configuration.
  • Fig. 21 illustrates a hot strip roughing rolling line relating to the third embodiment of the invention.
  • This line includes heating furnaces 46, a press 47 for pressing the overall length of slabs, vertical roll rolling mills 48, 50, 50' and 52 of a roughing mill, and horizontal roll rolling mills 49, 51 and 53.
  • the press 47 is arranged between the heating furnaces 46 and the first rolling mills (48, 49).
  • the slabs transferred from the heating furnaces are subjected to the sizing of the press 47 or reduced in their widths and are then transferred into the roughing rolling mill.
  • the press 47 for pressing the overall width of the slabs is controlled by a device shown in Fig. 22.
  • W f (W F , H F' W S , H S , H R , T, S) using width W F of hot rolled products, thickness H F of the products, width W s of slabs, thickness H S of the slabs, thickness H R of sheet bars, heating temperature T and kinds of sheet S upon receipt demand of rolling.
  • the amplitude 2a and frequency f in pressing are determined. These determined values are transmitted into a controller 55 for controlling the press 47.
  • the minimum open distance W of anvils, and amplitude 2a and frequency f of pressing are set by arithmetic operation on the basis of these inputted data in the controller 15.
  • the controller 55 for the press When a slab detector 58 detects the preceding end of the slab 41, the controller 55 for the press generates a signal to start the oscillation of the anvils 44 through a hydraulic selector valve 59 and hydraulic cylinders 45. At the same time, moreover, when a slab detector 58' detects the preceding end of the slab 41, pinch rolls 57 and a buckling preventing device 56 are lowered so as to detect advanced distances of the slab by the pinch rolls to effect the position tracking of the slab 41. The tracking of the slab 41 by the pinch rolls 57 is controlled by a pulse generator (not shown) provided thereat.
  • the slab is pressed to reduce the width by the anvils oscillated with amplitude 2a and frequency f from the preceding end to the proximity of the trailing end of the slab as above described. Pressing in a manner different from this may of course be used. For example, only the preceding end of the slab is pressed by the anvils with amplitude and frequency different from those in the above embodiment or the intermediate portion of the slab is pressed by the anvils with varying amplitude and frequency. These modifications are within the scope of the invention.
  • the slab detector 58 detects the trailing end of the slab 41
  • the operation of the press 47 is once stopped and at this time the tracking of the trailing end of the slab is effected.
  • the trailing end of the slab is pressed to reduce the width from the location immediately before the end is in contact with the anvils 44 over the length from l to l+2a/tan 8.
  • the slab 41 as shown in Fig. 20 is obtained.
  • the slab is roughing-rolled through one pass in the first rolling mills 48 and 49, three passes including reverse pass in the second rolling mills 50, 51, and 50' and one pass in the third rolling mills 52 and 53 including two horizontal rolling mills, and is fed for finishing rolling mills.
  • a line E indicates the relation between the reduction in width and the tongue at the trailing end of the slab when the slab is roughing-rolled after pressing to reduce the width
  • a line F indicates the relation between the reduction and the tongue by the vertical rolls.
  • the initial reduction by pressing may be determined to be substantially equal to the reduction of 450 mm which is required to obtain the aimed width of the slab, or in other words to be somewhat wider than the aimed width, thereby obtaining sound slabs.
  • slabs having much better shapes in plan view are obtained to improve the yield rate and the pressing to reduce the width can be continuously effected without stopping the slab as in the prior art, thereby avoiding lowing the yield rate.
  • the reduction by vertical rolls are very small utilizing the vertical rolls of roughing mills according to the invention, the reduction in width of slabs can be accomplished with installations whose number is one less than those in the prior art process using the preforming press and the exclusive vertical rolling apparatus, thereby avoiding the disadvantage of elongated operating line.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP85302071A 1984-03-29 1985-03-26 Verfahren zur Verringerung der Breite von Platten durch Pressen und Presse hierzu Expired - Lifetime EP0157575B2 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP59531/84 1984-03-29
JP59532/84 1984-03-29
JP59533/84 1984-03-29
JP59059532A JPH0683841B2 (ja) 1984-03-29 1984-03-29 熱間スラブの幅圧下方法
JP59059531A JPS60203303A (ja) 1984-03-29 1984-03-29 プレスによる熱間スラブの幅圧下方法
JP5953384A JPS60203305A (ja) 1984-03-29 1984-03-29 熱間スラブのプレスによる幅圧下方法及びプレス装置

Publications (4)

Publication Number Publication Date
EP0157575A2 true EP0157575A2 (de) 1985-10-09
EP0157575A3 EP0157575A3 (en) 1987-02-04
EP0157575B1 EP0157575B1 (de) 1990-05-23
EP0157575B2 EP0157575B2 (de) 1996-04-10

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Application Number Title Priority Date Filing Date
EP85302071A Expired - Lifetime EP0157575B2 (de) 1984-03-29 1985-03-26 Verfahren zur Verringerung der Breite von Platten durch Pressen und Presse hierzu

Country Status (4)

Country Link
EP (1) EP0157575B2 (de)
KR (1) KR900004152B1 (de)
AU (1) AU567608B2 (de)
DE (1) DE3577816D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2745954A2 (de) * 2012-12-13 2014-06-25 GFM GmbH Verfahren zum Schmieden eines Werkstücks
RU2525954C2 (ru) * 2012-10-16 2014-08-20 Открытое Акционерное Общество "Тяжпрессмаш" Способ производства заготовок на прокатных станах

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62124044A (ja) * 1985-11-22 1987-06-05 Kawasaki Steel Corp 熱間スラブの幅圧下プレス方法及び装置
JPH0679721B2 (ja) * 1986-12-01 1994-10-12 川崎製鉄株式会社 スラブの幅圧下方法
US4930207A (en) * 1988-06-07 1990-06-05 Kawasaki Steel Corp. Method and apparatus for continuous compression forging of continuously cast steel
GB9027120D0 (en) * 1990-12-14 1991-02-06 Davy Mckee Sheffield Width reduction of metal slabs
DE4106490A1 (de) * 1991-03-01 1992-09-03 Schloemann Siemag Ag Verfahren zum betreiben einer stauchpresse

Citations (8)

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Publication number Priority date Publication date Assignee Title
DE1960418A1 (de) * 1969-12-02 1971-06-24 Horst Schenk Werkzeug fuer Schmiedemaschine
US3921429A (en) * 1974-04-11 1975-11-25 Tadeusz Sendzimir Process and apparatus for modifying the cross section of a slab
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Cited By (5)

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RU2525954C2 (ru) * 2012-10-16 2014-08-20 Открытое Акционерное Общество "Тяжпрессмаш" Способ производства заготовок на прокатных станах
EP2745954A2 (de) * 2012-12-13 2014-06-25 GFM GmbH Verfahren zum Schmieden eines Werkstücks
EP2745954A3 (de) * 2012-12-13 2014-11-26 GFM GmbH Verfahren zum Schmieden eines Werkstücks
AT513701B1 (de) * 2012-12-13 2015-06-15 Gfm Gmbh Verfahren zum Schmieden eines Werkstücks
EP2745954B1 (de) 2012-12-13 2016-03-16 GFM GmbH Verfahren zum Schmieden eines Werkstücks

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KR900004152B1 (ko) 1990-06-18
AU567608B2 (en) 1987-11-26
EP0157575B1 (de) 1990-05-23
EP0157575A3 (en) 1987-02-04
AU4053185A (en) 1985-10-03
KR850007001A (ko) 1985-10-30
DE3577816D1 (de) 1990-06-28
EP0157575B2 (de) 1996-04-10

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