US2809545A - Arrangement for rolling straight bars at high rolling speeds - Google Patents

Arrangement for rolling straight bars at high rolling speeds Download PDF

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Publication number
US2809545A
US2809545A US61965956A US2809545A US 2809545 A US2809545 A US 2809545A US 61965956 A US61965956 A US 61965956A US 2809545 A US2809545 A US 2809545A
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Prior art keywords
channel
switching
channels
delivery
stock
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English (en)
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Norlindh Sven Erik Malte
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/18—Switches for directing work in metal-rolling mills or trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
    • B21B43/003—Transfer to bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
    • 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
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station

Definitions

  • FIG.8 ARRANGEMENT FOR ROLLING STRAIGHT BARS AT HIGH ROLLING SPEEDS Filed Nov. 1, 1956 e Sheets-Sheet 3 FIG.8
  • Thisinvention relatestoan improved apparatus for :rolling. straight I.bars at'high rolling speeds and in par- ;ticularto an improved means for cutting the rolled bar into lengths and conveying the same via switching chan- :nels and friction-braking guide ch'ann'els-to a-cooling bed.
  • the bars are cut'by means of a rotary shear into a suitable number of cooling bedlengths.
  • the weight of the'billets can bekept high, e. 'g. 150 kgs. (330 lbs.).
  • thebrakingperiod is 4 seconds and the stopping distance .is 23.2 ma (76 ft.). If such a bar is cut every'four sec- :nonds the previously cut barhas reached the speed zero, :i. .e. it stops at the very instant when the following .cooling .bed length is-.cut.
  • Fig. 12 shows how the two .barsroverlap eachother. When the finishing speed is 20.4 m./sec. (4,000 itlmin.) the braking period is 7-l seconds andithe stopping distance is 71.5 m. .(235 ft). fFig. .12. il1ustrates'how thebars overlap each other :when they-are cut every two, every three, every four and-every fiveseconds.
  • the bar is cutinto bed lengths just aftervthe finishing sstand ofithe wire rod train.
  • the bars can then slide t throughpipes'toi the coolingbed and the distance between .the;rotary.shear andthe cooling bed is adapted to the speed, .in order that the bars will be friction braked :to-a standstilljust above the cooling bed.
  • the present .invention is .characterized in that the cut-off cooling .bedzlengths. are,.by. means of switching channels, directed .into different elongated guide channels wherein the slide and brake themselves by friction to a standstill at .a point just above the cooling bed and are then transxferredonto the cooling bed.
  • FIG. 1- is, aschematic side view showing the improved arrangement of switching channels and guide channels ;for leading the cutbarlengths to the cooling bed;
  • Fig. 2 is a view similar to Fig. 1 but showing the elements in' plan;
  • Figs. 3-7 are: transverse sections. taken on lines III- 1H, IVIV, -VV,”VIVI and VIIVII, respectively in "Fig. 1;
  • Fig. 8 is a section showing in detail alower part in Fig. 7;
  • Figs.,9 and 10 are views similar to Figs. 1 'and 2 but showing amodified embodiment of.the invention utilizing additional switching channels and two cooling beds instead of one;
  • Fig. 11 is a schematic'sectional view of the cooling bed, the view being taken on line XI-)G of Fig. 10;
  • Fig. .12 is a tabulationand chart indicating the move- 'ment of-the bars when .braked by their ownfriction against the .guide channels atdifferent finishing speeds and when'cut into different lengths, and
  • Figs.-1517 are various views of the revolvable shear -device whichcutsthe continuously running high speed rolled bar'stock into cooling .bed lengths as the first switching channel is shifted between its two delivery positions.
  • the referencenumeral 1 indicates the finishing stand
  • the delivery guides from'the stand 1 arevindicated by numeral 2
  • the delivery-end of switch 0 .channel 3 is connected to thepiston of a compressed air operated cylinder 4. and which functions toshiftthe 'deslivery endof switch-channel 3 back and forth between .twn. delivery. positions as shown in Fig. 3 and also-in
  • Theshear devicei'. is 'locatedlbetween thev deliveryend of switch channel'Sandthe inlet. ends of;the pair of switching channels .6 and 7 and functions to cut the. conrtinuously. running bar stock into lengths each time the switching channel '3 isshifted from one delivery position i to' the other. .
  • braking channels 9 and 11 are associated with the two delivery positions of .switching channel 6, and
  • guide or braking:channels: and .12 are associated with the two'delii/ery positions of switching channel 7..
  • Figs. 13 to 17 The construction. and operating sequence for the revolving shear device situated between the delivery end of switching channel 3 and the stationary entrance ends of the next following pair of switching channels 6 and 7 is illustrated in Figs. 13 to 17.
  • Therevolvingshear device is comprised of a pair of rotary driven disc shears 5 supported on a housing 5a which contains the drive 'mechanism for the shears 5 and housing 5a is supported by a vertically extending shaft 512 in such manner as to enable the housing 5a to be revolved back and forth about the axis of shaft 5b between the two positions. shown respectively 'inFigs. 14 and 16 and Which are 90 apart.
  • Fig. 13 shows the positions of the shears 5 and stock S as related to Fig. 14 wherein the switching channel 3 is feeding the stock into switching channel 6, and me similar manner
  • Fig. 15 shows the positions of the shears 5 and stock S as related to Fig. 16 wherein the switching channel 3 is feeding the stock S into switching channel 7.
  • the pressure air cylinder 4a then operates to revolve the shears 5 to the position shown in Fig. 16.
  • the following part of the stock then passes by the shears 5 into the entrance end of switching channel 7 and thence through the same into one'of the two guide channels 10 or 12 associated with the delivery end of switching channel 7.
  • the pressure air cylinder 4 is again actuated to shift the delivery end of channel 3 from the position shown in Fig. 16 back to theposition shown in Fig. 14 and the stock S is simultaneously pushed in the direction indicated by the arrow in Fig. 15 into the shears 5 where it is gripped and cut 013?.
  • the cut off length of stock then passes through channel 12, for example, and is gradually friction braked to a .standstill as it reaches the cooling bed 73.
  • sequence of operations then repeats itself causing successivelycut off lengths to pass through guide and friction braking channels 9, 12, 11 and 10' to the cooling bed 73.
  • guide channels 9-12 are located near the cooling bed, are disposed horizontally one above the other asshown in Fig. 6, and are connected to the horizontally disposed terminal channels 81 as indicated in Figs. 7 and 8.
  • this channel which is fastened to a tube 82, can be turned counter-clockwise, as shown for the lowermost channel 81 of Fig. 8, so that the cut falls down, for example, into the first cooling bed notch 61. 1
  • V will be 71.5 m. (235 ft.), which shall be equal to the distance between the'rotary shear 5 and a short length into the cooling bed. In order to avoid that the tail end of the last out of the strand stops at a point considerably different from those ones of the other cuts the distance A from the finishing stand to the rotary shear must be short.
  • Figs. 7 and 8 an upper cover 83 is shown for each channel 81 serving as a lid.
  • the bar' becomes completely enclosed and a frictional drag is imposed upon thecut section until it has stopped.
  • the difiiculties to control the movements of the first end of the bar which are very great, when using open runout roller tables, already at a speed of 11 m./sec. (2200 ftJmin.) arehereby eliminated and it is possible to roll at practically any speed.
  • the length of the cuts must be suflicient or else the cuts have to be distributed into a sufiicient number of pipes and guide channels. See Fig. 12. At 20.4 m./ sec.
  • Each channel 81 with its cover 83 is preferably made in short sections with regard to the thermal expansion.
  • the tube 82 has, however, just the same length as the cooling bed and can suitably be cooled with water, and rests on horizontal supports 84, on which the tube 82 can roll, when the bar is tipped on the cooling bed. See Fig. 8, the lower channel.
  • the tubes 82 can suitably be guided by the chains 90, 91 and 92, when each is operated by the compressed-air cylinder 88, turning the tube by means of the lever 89, thereby to discharge a cut-01f bar 80 from the associated channel 81.
  • the tube cannot roll any further, and in the other direction the tube stops against the beams 85.
  • the tube can possibly be placed upon supporting rollers or something similar.
  • Figs. 9-11 illustrate a different embodiment of the invention and in which twin cooling beds are used'and also two additional sets of switching tubes.
  • the switching tubes 3 and 6', 7' correspond to the tubes 3 and 6, 7 of the embodiment shown in Figs.
  • Fig. 11 there are also shown auxiliary devices such as runout tables 69, 70 for coarser bars having a finishing speed of below 10 m./sec. (2,000 ft./min.).
  • a footway 71 for workmen is located between the cooling beds 72, 73' and shufile bars 75 are provided to transfer a plurality of the bars to a cold shear roller table 77 for cutting the cold shear 79.
  • a nch roller device for moving the cut stock longitudiby a compressed air motor 97. The pressure roller clamps the bar close to the feeding roller as long as a light beam to a photoelectric cell 98 is not interrupted by the end i the bar. In this way each bar is drawn longitudinally to a position such that a rotary cold shear 99 can cut e. g. twenty bars at a time into finished lengths.
  • the present 'nvention makes it possible to roll rod stock at relatively sigh speeds and to cut and deliver lengths of the stock 0 the cooling bed via the multiple switching and fricn braking guide channels in such manner that the cut engths do not overtake each other in the channels and re brought to a standstill at the cooling bed.
  • guide channel means for delivering cut sections of rolled stock, said out sections travelling slidingly and in contact with the surfaces of said guide channel means thereby to frictionally brake said cut sections to substantially a standstill at the delivery end thereof
  • said guide channel means including a first switching channel for receiving at the inlet end thereof a continuous length of the rolled stock, means actuating said first switching channel to shift the outlet end thereof between two spaced delivery positions, a pair of switching channels having stationary inlet ends located respectively at the delivery positions of said first switching channel, a revolvable shear device located between the outlet end of said first switching channel and the stationary inlet ends of said pair of switching channels for cutting said continuous length of rolled stock as it emerges from the outlet end of said first switching channel into separate lengths for sliding movement through said pair of switching channels in alternation, means to revolve said shear device about its ads from one cutting position to another, the shearing action being efiected by moving the stock across the shears upon shifting of said first switching channel and said revolvable shear device being revolved alternately
  • guide channel means for delivering cut sections of rolled stock, said out sections travelling slidingly and in contact with the surfaces of said guide channel means thereby to frictionally brake said out sections to substantially a standstill at the delivery end thereof
  • said guide channel means' including a first switching channel for receiving at the inlet end thereof a continuous length of the rolled stock, means actuating said first switching channel to shift the outlet end thereof between two spaced delivery positions, a pair of switching channels having stationary inlet ends located respectively at the delivery positions of said first switching channel, a revolvable shear device located between the outlet end of said first switching channel and the stationary inlet ends of said pair of switching channels for cutting said continuous length of rolled stock as it emerges from the outlet end of said first switching channel into separate lengths for sliding movement through said pair of switching channels in alternation, means to revolve said shear device about its axis from one cutting position to another, the shearing action being effected by moving the stock across the shears upon shifting of said first switching channel and said revolvable shear device being revolved alternate
  • Guide channel means as defined in claim 2 wherein the outlet end of said first switching channel is shifted between two spaced delivery positions in a first plane and wherein the outlet ends of said pair of switching channels are shifted between two spaced delivery positions in a second plane normal to said first plane and wherein said guide channels are longitudinally curved between their inlet ends and their outlet end portions and have their outlet end portions located generally horizontal and each above the other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Metal Rolling (AREA)
US61965956 1952-02-06 1956-11-01 Arrangement for rolling straight bars at high rolling speeds Expired - Lifetime US2809545A (en)

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BE (1) BE517421A (ru)
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4307594A (en) * 1979-11-28 1981-12-29 Rolf Steinbock Delivery system for hot-rolled workpieces
US4884429A (en) * 1986-11-14 1989-12-05 Morgan Construction Company Decelerator apparatus for hot rolled product
EP1428587A1 (en) * 2002-12-11 2004-06-16 Morgan Construction Company System and method for delivering the hot rolled products of hot rolling mills to a cooling bed
US20050091818A1 (en) * 2003-11-05 2005-05-05 Shore T. M. Bar delivery system and method
US7219521B1 (en) 2006-09-19 2007-05-22 Morgan Construction Company Rolling mill product handling system
CN101829675A (zh) * 2010-03-29 2010-09-15 郑州新华重型机器有限公司 钢板生产在线双矫直机短流程精整线的布置方法
US20110017577A1 (en) * 2009-07-21 2011-01-27 Morgan Construction Company Apparatus for laterally transferring bars from a receiving path to a braking path
ITVI20120040A1 (it) * 2012-02-22 2013-08-23 Sms Meer Spa Sistema per il ricevimento e convogliamento di barre provenienti da un laminatoio e relativo impianto per la produzione ed il confezionamento di barre e profili in acciaio
CN111731840A (zh) * 2020-07-03 2020-10-02 江西益丰建设有限公司 建筑施工用多功能管材输送设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3236084A (en) * 1963-06-13 1966-02-22 Hitachi Ltd Apparatus for delivering steel bar sections onto the cooling bed of a bar mill

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1407169A (en) * 1920-08-03 1922-02-21 Nat Tube Co Cooling table
US1852237A (en) * 1930-01-30 1932-04-05 Morgan Construction Co Method of and apparatus for preparing metal stock for use in pipe making
US2017378A (en) * 1933-12-29 1935-10-15 American Steel & Wire Co Guide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1407169A (en) * 1920-08-03 1922-02-21 Nat Tube Co Cooling table
US1852237A (en) * 1930-01-30 1932-04-05 Morgan Construction Co Method of and apparatus for preparing metal stock for use in pipe making
US2017378A (en) * 1933-12-29 1935-10-15 American Steel & Wire Co Guide

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4307594A (en) * 1979-11-28 1981-12-29 Rolf Steinbock Delivery system for hot-rolled workpieces
US4884429A (en) * 1986-11-14 1989-12-05 Morgan Construction Company Decelerator apparatus for hot rolled product
EP1428587A1 (en) * 2002-12-11 2004-06-16 Morgan Construction Company System and method for delivering the hot rolled products of hot rolling mills to a cooling bed
US20050091818A1 (en) * 2003-11-05 2005-05-05 Shore T. M. Bar delivery system and method
US7069759B2 (en) 2003-11-05 2006-07-04 Morgan Construction Company Bar delivery system and method
US7219521B1 (en) 2006-09-19 2007-05-22 Morgan Construction Company Rolling mill product handling system
US20110017577A1 (en) * 2009-07-21 2011-01-27 Morgan Construction Company Apparatus for laterally transferring bars from a receiving path to a braking path
US7918327B2 (en) 2009-07-21 2011-04-05 Siemens Industry, Inc. Apparatus for laterally transferring bars from a receiving path to a braking path
CN101829675A (zh) * 2010-03-29 2010-09-15 郑州新华重型机器有限公司 钢板生产在线双矫直机短流程精整线的布置方法
ITVI20120040A1 (it) * 2012-02-22 2013-08-23 Sms Meer Spa Sistema per il ricevimento e convogliamento di barre provenienti da un laminatoio e relativo impianto per la produzione ed il confezionamento di barre e profili in acciaio
CN111731840A (zh) * 2020-07-03 2020-10-02 江西益丰建设有限公司 建筑施工用多功能管材输送设备

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Publication number Publication date
GB743853A (en) 1956-01-25
FR1187605A (fr) 1959-09-14
BE517421A (ru) 1900-01-01

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