EP0913214A2 - Presse zum Kalibrieren von Brammen - Google Patents

Presse zum Kalibrieren von Brammen Download PDF

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Publication number
EP0913214A2
EP0913214A2 EP98120495A EP98120495A EP0913214A2 EP 0913214 A2 EP0913214 A2 EP 0913214A2 EP 98120495 A EP98120495 A EP 98120495A EP 98120495 A EP98120495 A EP 98120495A EP 0913214 A2 EP0913214 A2 EP 0913214A2
Authority
EP
European Patent Office
Prior art keywords
slab
block
arm
blocks
sizing press
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
EP98120495A
Other languages
English (en)
French (fr)
Other versions
EP0913214B1 (de
EP0913214A3 (de
Inventor
Shigetoshi Kondoh
Yasutsugu Yoshimura
Takao Sakanaka
Kouichi Seki
Takashi Kamoshita
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0913214A2 publication Critical patent/EP0913214A2/de
Publication of EP0913214A3 publication Critical patent/EP0913214A3/de
Application granted granted Critical
Publication of EP0913214B1 publication Critical patent/EP0913214B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21B15/0035—Forging or pressing devices as units
    • 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
    • B21B2001/028—Slabs

Definitions

  • the present invention relates to a hot slab width reduction equipment and, more particularly, to a slab sizing press which reduces the width of a slab by pressing a slab side surface by a swinging motion due to rotation of crankshafts arranged to be opposite to each other.
  • a balancing mechanism pulling the outer block toward the crankshaft to reduce a play and a width adjusting mechanism for setting an initial position of an inner block relative to the slab width are necessary.
  • Such a width adjusting mechanism is disclosed in JP B 2-50807 and JP A 5-123701.
  • the mechanism in the former is provided with screws and nuts of 4 at an entry side, delivery side, upper side and lower side, that is, 8 sets in total, and the mechanism in the latter is provided with screw and nut of one per each and two sets in total.
  • a slab sizing press presses a slab side surface, using a die having a parallel portion and a tapered portion to attain a desired width thereof.
  • pre-formation at a preceding end of the slab and a pre-formation at the succeeding end of the slab are effected and reverse feeding press is effected in a relation to the front and rear equipment.
  • the center of a pressing load in the slab sizing press changes according to such a die shape and various operations and, particularly, the change being large in an entry-delivery direction is a factor of damaging the stability of the mechanism and making the construction complicated.
  • the conventional slab sizing press disclosed in JP A 2-50807 is provided with bearings at both ends of two connecting rods at the entry and delivery, that is, four connecting rods in total. Further, it is provided with 4 screws and nuts at the entry, delivery, upper side and lower side, that is, 8 screws and nuts in total, as a width adjustment mechanism.
  • the stability of the mechanism to a change of a press load is high, however, the construction is complicated, so that a cost of the equipment is high and the maintenance is bad.
  • the slab sizing press disclosed in JP A 5-123701 is provided with one connecting rod for each and two connecting rods in total, each connecting rod at the outer block side is formed in a male female spherical surface (pitman), and one screw and nut for each, two screws and nuts in total are provided as a width adjustment mechanism.
  • the crank mechanism and width adjustment mechanism each are simple. However, the stability of the mechanism to a change of a point at which a press load is applied is low, a rotating moment is caused on the inner block and the outer block by the deviation of the press load. Therefore, a guide mechanism against the rotating moment is necessary around the outer block and the maintenance operability of the guide mechanism is bad.
  • a slab sizing press which has both of a high stability of mechanism and a simple construction, which further has a low cost and a good maintenance operability.
  • An object of the present invention is to attain both of stability of a slab sizing press mechanism and simplification of the construction.
  • a slab sizing press of the present invention is a slab sizing press which presses side surfaces of a slab by transmitting a swinging motion caused by rotation of two crankshafts opposite to each other to two opposite first blocks arranged inside the two crankshafts, and which is characterized in that at least one arm mounted rotatably on each one of the two crankshafts, a tip of the arm is in contact with the above-mentioned first block, one of the contacting surfaces is made cylindrical or spherical and the other contacting surface is made flat, cylindrical or spherical, and a balancing mechanism pulling the first block toward the crankshaft at the outside of the first block is provided.
  • a slab sizing press of the present invention is a slab sizing press for reducing the width of a slab, characterized by comprising a pair of eccentric crankshafts each transmitting a width reducing load, a pair of arms each mounted rotatably on the eccentric crankshaft, a pair of first blocks each rolling-contacting with the arm, a pair of second blocks each mounted so that the distance between the first and second blocks is adjustable, a pair of dies each mounted on the second block, and two distance adjusting means are provided in the slab conveying direction, each for adjusting the distance between the first and second blocks.
  • the construction is simplified without losing the stability by setting the number of screws and nuts as a width adjustment mechanism to 2 at the entry and delivery sides and 4 in total while in JP B 2-50807 the screws and nuts are 4 at the entry, delivery, upper and lower sides and 8 in total.
  • a load distributions of entry and delivery sides and a load distribution of upper and lower sides in a 1/10 model test machine of a slab sizing press provided with screws and nuts of 4 at entry, delivery, upper and lower sides, that is, 8 in total are shown in Fig. 6 and Fig. 7, respectively.
  • Fig. 6 allocation loads of an entry side screw are plotted on an abscissa and allocation loads of an delivery side screw are plotted on an ordinate.
  • the load at the entry side is equal to that at the delivery side
  • points of the loads are plotted on a straight line, the center of a press load meets with the center of the press equipment.
  • the points in Fig. 6 are deviated from the line and spreading therefrom, and it is noted that the center of the press load changes in the entry delivery direction.
  • the press load transmitting course is approximately the same, however, since the screw nuts are two at the entry and delivery, it is impossible to take any device of such arrangement as in JP B 2-50807.
  • a rolling element is provided in one of contact portions between the arm and the outer block, and a sliding element sliding to the rolling element is provided on the other contact portion.
  • rolling-contacting is also possible by making both of the contact portions into rolling elements.
  • rolling elements 30 having cylindrical surface, columnar surface, spherical surface, etc. to roll can be raised. That is, they each have a curved surface which is able to effect rolling-contact.
  • the sliding surface sliding to the rolling element is a sliding surface element 31 such as a flat plate as shown in Fig. 8 (a), however, in an allowable range in which the shape of the rolling element contacting with the sliding surface allows sliding contact, a curved surface shape can be applied.
  • the allowable range for example, means a play 32 of an extent that a rolling-contacting condition can be kept in the case where any one of the rolling element 30 and the sliding surface element 31 inclines in an up and down direction while keeping a contact between the rolling element 30 and the sliding surface element 31, as shown in Fig. 8 (c). That is, as shown in Fig. 8 (d), it is sufficient if a play 32 is formed by making the curvature of the sliding surface shape larger than that of an arc shape of the rolling element 30.
  • a deviation or shift preventing means In order to effect a precise swinging motion due to rotation of the crankshaft, it is preferable to provide a deviation or shift preventing means.
  • this shift preventing means a sector gear, stopper, pin, elastic body (spring, etc.) can be raised.
  • a stopper can be provided so that the contact surface is separated beyond the engagement depth (fitting length) of the sector gear, pin or stopper.
  • Fig. 1 shows a plan view of a slab sizing press of an embodiment of the present invention
  • Fig. 2 shows a side view of the slab sizing press of Fig. 1.
  • the slab sizing press comprises mainly a slab width rolling means, a slab width adjusting means and a slab conveying means.
  • crankshaft 2 which is an eccentric shaft.
  • the crankshaft 2 is rotatably held by bearings 4 for crankshaft provided both ends of a window of a housing 1, and rotated by a crankshaft driving motor 8.
  • the crankshaft 2 is provided with two arms 3 at an entry and delivery (in a slab conveying direction), each of which is rotatably mounted on the crankshaft through a bearing 5 for arm.
  • the arms 3 each are provided, at its tip, with a flat plate 6 as a sliding surface in this embodiment.
  • a sector gear 22 is provided as a means for preventing the flat plate from being shifted.
  • rocker plates 7 are provided, each of which is a rolling element shaped cylindrical in part.
  • Sector gears 23 are provided for the rocker plates 7, respectively, as means for preventing the rocker plates being shifted.
  • the rocker plates 7 are in contact with the flat plates 6 with a slight play in an up and down direction.
  • the flat plates 6 at the side of the arms 3 and the rocker plates 7 at the side of outer block 9 can be arranged reversely. That is, it is sufficient if in a case where a press load from the crankshaft 2 is transmitted to the outer block 9 through the arms 3, the transmission can be effected by the rolling-contact.
  • sector gears 22 and sector gears 23 can be replaced by stoppers, pins, springs of elastic body or the like, each of which has a shift-preventing effect.
  • the pressing load transmitted to the outer block 9 is transmitted to the die through screws 10 and an inner block 13, and then the width of a slab 20 is reduced by the die to which the press load has been transmitted. That is, work necessary to press is given by a swinging motion caused by rotation of the crankshaft 2, whereby the side faces of the slab 20 are pressed by the die 14 to reduce the slab width.
  • a width adjusting mechanism therefor comprises the screws 10 and nuts 11 provided in the outer block 9.
  • 2 sets of the screws 10 and nuts 11 are provided at the entry side and delivery side (in the slab conveying direction), and they are arranged so that the center of a press load is positioned between the two screws 10 even if the central position of the press load changes in the entry and delivery direction.
  • the screws 10 are arranged so that the height of axes of the two screws 10 is substantially the same as the height of the slab center, as shown in Fig. 2, and it is constructed so that the load is transmitted to the slab 20 stably with respect to the up and down direction.
  • the screws 10 are pressed out or pulled out by rotation of the nuts 11 caused by wormshafts 17.
  • the wormshafts 17 are driven by a motor 12.
  • the tip of each of the screws 10 is in contact with the back side of the inner block 13 to transmit a pressing load.
  • the die 14 having a parallel portion and a tapered portion is provided at the inner side of the inner block 13.
  • the screws 10 are moved axially, using the nuts 11 and wormshaft 17.
  • the movement changes a distance between the inner block and the outer block and enable slab width adjustment.
  • the number of parts can be reduced than 4 sets of a conventional machine, the construction can be made simple and maintenance is raised.
  • the 2 sets of the means for adjusting the distance between the inner block 13 and the outer block 9 are arranged at approximately the same height as the height of the slab 20, so that the load can be stably transmitted.
  • conveying the slab 20 is effected by pinch rollers 18 provided at the entry and delivery.
  • the pinch rollers 18 at the entry and delivery are rotated by rotation of each of motors 19, whereby a necessary feed quantity is given to convey the slab 29 which has been pressed once.
  • the following impulse load suppressing means is provided.
  • an inner block balancing cylinder 16 is provided for removing the play between the inner block 13 and the outer block 9 and an outer block balancing cylinder 15 is provided for removing the play between the outer block 9 and the housing 1.
  • the inner block balancing cylinder 16 also has a function of removing a play in a driving system of the width adjustment mechanism
  • the outer block balancing cylinder 15 also has a function of removing a play in a driving system of the crankshaft 2.
  • load cells 24 for detecting a pressing load each are provided between the outer block 9 and the rocker plate 7.
  • a pressing load applied really can be precisely detected by the load cells 24.
  • the load cells 24 can be positioned anywhere as long as they are between the housing 1 and the die 14.
  • the construction can be made simple and the cost can be reduced by reducing 4 screws and nuts at the entry and the delivery to 2 screws and nuts.
  • the two arms between the crankshaft and the outer block are provided at the entry and delivery sides (in the slab conveying direction), the stability of machine to a change of the center of a press load can be further improved.
  • the swinging motion by the crankshaft can be repeatedly effected and the precise motion can be secured, whereby the stability of operation can be improved.
  • an effect of simplifying the construction while securing the stability of the slab sizing press can be attained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Metal Rolling (AREA)
  • Press Drives And Press Lines (AREA)
EP98120495A 1997-10-31 1998-10-29 Presse zum Kalibrieren von Brammen Expired - Lifetime EP0913214B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP299914/97 1997-10-31
JP29991497 1997-10-31
JP29991497A JP3381584B2 (ja) 1997-10-31 1997-10-31 スラブサイジングプレス

Publications (3)

Publication Number Publication Date
EP0913214A2 true EP0913214A2 (de) 1999-05-06
EP0913214A3 EP0913214A3 (de) 2000-03-01
EP0913214B1 EP0913214B1 (de) 2004-10-13

Family

ID=17878460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120495A Expired - Lifetime EP0913214B1 (de) 1997-10-31 1998-10-29 Presse zum Kalibrieren von Brammen

Country Status (4)

Country Link
EP (1) EP0913214B1 (de)
JP (1) JP3381584B2 (de)
KR (1) KR100532011B1 (de)
DE (1) DE69826958T2 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022793B4 (de) * 1999-05-10 2005-07-14 Hitachi, Ltd. Stauchpresse zur Breitenreduktion von Warmwalzbarren und Verfahren zum Stauchen von Warmwalzbarren
EP2478978A1 (de) 2011-01-21 2012-07-25 Siemens VAI Metals Technologies GmbH Stauchpresse und Stauchverfahren
CN110142363A (zh) * 2019-05-10 2019-08-20 思进智能成形装备股份有限公司 一种带保护的滑动式曲轴传动装置
CN115229114A (zh) * 2022-09-09 2022-10-25 西安麦特沃金液控技术有限公司 一种锻打压力机模具在线调整机构及调整方法
CN115446126A (zh) * 2022-08-31 2022-12-09 鞍钢股份有限公司 一种热轧定宽压力机咬钢抛钢方法

Family Cites Families (2)

* 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
JPH09168805A (ja) * 1995-10-20 1997-06-30 Ishikawajima Harima Heavy Ind Co Ltd 幅圧下プレス

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022793B4 (de) * 1999-05-10 2005-07-14 Hitachi, Ltd. Stauchpresse zur Breitenreduktion von Warmwalzbarren und Verfahren zum Stauchen von Warmwalzbarren
EP2478978A1 (de) 2011-01-21 2012-07-25 Siemens VAI Metals Technologies GmbH Stauchpresse und Stauchverfahren
CN110142363A (zh) * 2019-05-10 2019-08-20 思进智能成形装备股份有限公司 一种带保护的滑动式曲轴传动装置
CN115446126A (zh) * 2022-08-31 2022-12-09 鞍钢股份有限公司 一种热轧定宽压力机咬钢抛钢方法
CN115446126B (zh) * 2022-08-31 2024-02-13 鞍钢股份有限公司 一种热轧定宽压力机咬钢抛钢方法
CN115229114A (zh) * 2022-09-09 2022-10-25 西安麦特沃金液控技术有限公司 一种锻打压力机模具在线调整机构及调整方法

Also Published As

Publication number Publication date
EP0913214B1 (de) 2004-10-13
KR100532011B1 (ko) 2006-03-03
DE69826958D1 (de) 2004-11-18
EP0913214A3 (de) 2000-03-01
KR19990037510A (ko) 1999-05-25
DE69826958T2 (de) 2005-10-13
JPH11129007A (ja) 1999-05-18
JP3381584B2 (ja) 2003-03-04

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