US3670609A - Method and apparatus for controlling shearing of metallic workpieces - Google Patents

Method and apparatus for controlling shearing of metallic workpieces Download PDF

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Publication number
US3670609A
US3670609A US3670609DA US3670609A US 3670609 A US3670609 A US 3670609A US 3670609D A US3670609D A US 3670609DA US 3670609 A US3670609 A US 3670609A
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US
United States
Prior art keywords
workpiece
shearing device
driving unit
shear
trailing end
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.)
Expired - Lifetime
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English (en)
Inventor
Joseph Contaldo
George Pripeton
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.)
United Engineering and Foundry Co
United Engineering Inc
Original Assignee
United Engineering and Foundry Co
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 United Engineering and Foundry Co filed Critical United Engineering and Foundry Co
Application granted granted Critical
Publication of US3670609A publication Critical patent/US3670609A/en
Assigned to WEAN UNITED, INC. reassignment WEAN UNITED, INC. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). TO RELEASE SECURTIY DOCUMENT RECORDED AT REEL, FRAME 4792/307 RECORDED FEB. 26, 1987 Assignors: PITTSBURGH NATIONAL BANK
Assigned to UNITED ENGINEERING ROLLING MILLS, INC. reassignment UNITED ENGINEERING ROLLING MILLS, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WEAN INCORPORATED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B23D25/02—Flying shearing machines
    • B23D25/08—Flying shearing machines having two coacting shearing blades mounted independently
    • B23D25/10—Flying shearing machines having two coacting shearing blades mounted independently on co-operating beams moving parallel to each other and attached to lever mechanisms
    • 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
    • Y10T83/04—Processes
    • Y10T83/0515—During movement of work past flying cutter
    • 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
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4653—With means to initiate intermittent tool action
    • 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
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y10T83/531—With plural work-sensing means
    • 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
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y10T83/536—Movement of work controlled
    • 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
    • Y10T83/6572—With additional mans to engage work and orient it relative to tool station
    • 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
    • Y10T83/664—Roller

Definitions

  • a flying shear includes a prima- [21] APPL NOS 875,655 ry pinch roll machine arranged in front of the shear to advance all but the trailing end portion of the billet to the shear for cutting into desired lengths. Between the primary pinch roll 8 except for the trailing end thereof issuing to the shear. This rne machine and the shear and immediately adjacent the shear, there is arranged a secondary pinch roll machine. A measurin roll is provided to measure the length of the billet,
  • asuring operation is employed to control the operation of the shear in cutting the billet into a number of desired length cuts.
  • the trailing end portion of the billet is not measured by the measuring roll but instead by the second pinch roll machine, which also advances the trailing end portion to the shear.
  • the object of the present invention to provide a method and apparatus and control for operating a flying shear in a manner to optimize the number of length cuts of a given length rolled workpiece.
  • FIG. 1 is an elevational view of a shear and of a primary and auxiliary pinch roll unit following the teaching of the present invention
  • FIG. 2 is a plan view of the apparatus illustrated in FIG. 1;
  • FIG. 3 is a partial sectional view taken on lines IIIIII of FIG. 2;
  • FIG. 4 is a schematic electrical diagram of the shear control employed with respect to the shear illustrated in FIGS. 1 and 2
  • a conventional flying shear designed to sever carbon steel billets, measuring between 2% X 2% inch to 5 X 5 inch, that issue from a rolling mill in a direction indicated by the arrow at the left-hand side of the figure.
  • the shear follows generally conventional designs, as typified, for example, in U.S. Pat. No. 2,878.869, and consists of two spaced-apart cranks l2 and 13 which are geared together by gearing, not shown, and which rotate knifeheads 14 and 15 in a circular path in the direction represented by the arrows in FIG.
  • FIG. 1 The positions of the knives in FIG. 1 represent their closed positions, which they assume upon completion of the severing of the workpiece.
  • the paths of the knives are controlled by identical arrns 18 and 19 which are pivotally mounted on secondary arms 21 and 22, the secondary arms being supported by shafts 23 and 24 which are rotatably carried by the.
  • shear illustrated is a continuously operating shear wherein the speed of the knives l6 and 17 will be synchronized with the constant speed of the billet during the cutting phase.
  • the primary pinch roll unit which consists of two identical rolls 25 and 26 designed, as shown in FIG. 2, to have a V formed in their bodies so as to fit the cross-section of the billet issuing to the pinch rolls in which the contact allows the pinch rolls to drive the billet to the shear for shearing. Since the roll assemblies consist of identical components, it is deemed necessary to describe only the upper roll 25. As shown in FIG. 2, it is cantilever-mounted by two parallel levers or arms 28 which are pivotally supported by a shaft 29 which extends out from the shear housing in a cantilever fashion so that its inward end is supported by the housing of the shear proper.
  • the actual support of the shaft 29 is provided by a vertical plate 31 which extends away from the housing of the shear, and provides a space between the housing and the end of the shaft 29.
  • a vertical plate 31 which extends away from the housing of the shear, and provides a space between the housing and the end of the shaft 29.
  • equalizing segmental gears 32 and 33 which tie together the two pinch rolls 25 and 26 so as to assure equal vertical displacement thereof. This displacement is effected by cylinders 34 and 35 which are connected to the extensions of the shafts 29 by arms 36 and 37.
  • a secondary or auxiliary pinch roll unit Inward of the primary pinch rolls 25 and 26 and closely adjacent to the shearing zone of the shear knives 16 and 17 there is provided a secondary or auxiliary pinch roll unit.
  • This unit consists of identical top and bottom rolls 41 and 42, for which reason only the roll 41 and its related parts will be described.
  • the roll 41 has its body section in the form of a V" to conform with the crosssection of the billet issuing to the shear. It likewise is cantilever-mounted having its inner end rotatably supported by a plate 43 which is spaced outward of the plate 31 which supports the shafts 29 of the primary pinch rolls.
  • the plate 43 is pivotally connected to the shear housing by an outwardly extending pin 44 which allows the plate, and hence the rolls as a unit, to move vertically.
  • Movement of the rolls independent of the plate 43 is accomplished in the case of the roll 41 by a piston cylinder assembly 45 which is connected to the plate through a link 46 and, by virtue of a pin 47, the link is connected to an arm 48 that carries the pinch roll 41.
  • the pin 47 actually is received in a slot in the plate 43, as can be seen in referring to FIG. 3, which allows the pin to move relative to the plate upon operation of the cylinders 45.
  • the upper pinch roll 41 outward of its bearings is connected to a piston cylinder assembly 51 employed to apply a downward pressure so as to pinch the billet between two rolls 41 and 42 and provide sufficient friction to drive the billet to the shear.
  • the entire assembly is pivotable about the pin 44 and, for this purpose, there is provided a piston cylinder assembly 52 connected to the plate 43 by an ear 53, the piston cylinder assembly 52 acting as a balance which allows the entire auxiliary pinch roll assembly to move upwardly during the shearing action when the billet is raised by the lower knife 17 of the shear.
  • the cylinder 52 urges the plate downward so that a projection 54 connected to the plate engages a stop 55 mounted on the shear housing, the stop being shown best in FIG. 1.
  • the primary pinch rolls 25 and 26 are each driven by a motor gear unit 56 through spindles 57, only the spindle for the upper roll being shown.
  • the auxiliary pinch rolls 41 and 42 are similarly driven by a motor gear assembly 58 through spindles 60, in which regard only the spindle for the upper roll 41 is shown.
  • the drive component of the auxiliary pinch rolls consists of a pulse generator 61 which, in a usual fashion, will measure the rotation of the auxiliary pinch rolls 41 and 42 which will represent a measurement of the length of the billet issuing through the pinch roll.
  • FIG. 4 represents a schematic electrical diagram of the shear control
  • the measuring roll 64 is connected to a drive and control system which produces a signal of the length of billet issuing over the roll which is fed to a main control 65.
  • the primary pinch rolls likewise, are associated with a drive and tachometer generator which feeds a signal to the main control 65. This signal represents the speed of the billet issuing from the primary pinch rolls.
  • auxiliary pinch rolls are connected to a drive and pulse generator system which feeds a signal to the main control 65 representing a measurement of the material issuing from the auxiliary pinch rolls.
  • a signal representing the desired length cut and a signal representing the crop data is fed to the main control which then produces a signal for the shear drive itself to control the cycling of the shear, both with respect to the desired length cuts and to the amount of crop to be taken from the front and back of the billet.
  • the primary object is to optimize the shearing of the product so that the maximum number of length cuts can be obtained and wherein the end cropping is done in a manner so as not to jeopardize this goal. For example, if the measured length of the billet issued from the mill 60 is 483 ft. and it is desired to cut l6-ft. lengths, the 3 ft. left over represent what is available for cropping if exactly 30 lengths are to be sheared at 16 ft. per length.
  • the billet is measured prior to entering the mill 62 by a procedure that will give its total length prior to rolling.
  • the amount of elongation by rolling is measured, which is added to the previously measured length to arrive at the final length of the billet issuing from the mill to the shear, and a signal for which is fed to the shear main control 65.
  • a signal of the exact length of billet issuing to the shear as measured by the measuring roll 64.
  • the peripheral speed of the billet is measured by the primary pinch rolls 25 and 26, the signal for which is sent to the main control. From the signals of the measured values, the control computes what is available for cropping and a signal representing the data is fed to the main control.
  • the shear is operated by the control to cut the bar into the desired length cuts, in which case each length thereof is measured by the measuring roll 64.
  • the billet is advanced to the shear by the primary pinch rolls 25 and 26.
  • a heat detector 63 which sends a signal to the main control 65 to disengage the primary pinch rolls 25 and 26 and engage the auxiliary pinch rolls 41 and 42, At that point, the pinch rolls 41 and 42 through the pulse generator 69 begin to measure the billet issuing to the shear 10 in the same fashion that the measuring roll 64 did.
  • auxiliary pinch rolls are mounted in close proximity to the cutting zone of the shear, they minimize the amount of unmeasured material going to the shear and, therefore, allow the operator to measure almost the entire length of the billet. After the last desired length has been cut, the piece that remains represents the difierence between what was cropped off the front end of the billet and what was initially determined to be available for both front and back cropping.
  • a primary driving unit for advancing the workpiece to said shearing device
  • auxiliary driving unit arranged between said primary driving unit and said shearing device and adjacent to the cutting zone of said shearing device
  • said primary driving device comprises a pair of pinch rolls arranged on opposite sides of the path of travel of the workpiece
  • auxiliary driving unit comprises,
  • a pair of pinch rolls arranged on opposite sides of the path of travel of the workpiece and including means for urging one of said pinch rolls towards the other to cause said pinch rolls to assume a driving relationship with the workpiece.
  • control system comprising means for causing said primary driving device to engage all but the trailing end portion of the workpiece and advance it to the shearing device

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Shearing Machines (AREA)
US3670609D 1969-11-12 1969-11-12 Method and apparatus for controlling shearing of metallic workpieces Expired - Lifetime US3670609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87565569A 1969-11-12 1969-11-12

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US3670609A true US3670609A (en) 1972-06-20

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ID=25366147

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Application Number Title Priority Date Filing Date
US3670609D Expired - Lifetime US3670609A (en) 1969-11-12 1969-11-12 Method and apparatus for controlling shearing of metallic workpieces

Country Status (4)

Country Link
US (1) US3670609A (enExample)
JP (1) JPS5118671B1 (enExample)
CA (1) CA931870A (enExample)
GB (1) GB1325366A (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141266A (en) * 1976-04-28 1979-02-27 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Drum type flying shears
US6216756B1 (en) 1999-03-22 2001-04-17 Howard Carl Mason Log processing apparatus
US8402870B1 (en) 2008-11-13 2013-03-26 Michael S. Marquette Multi-function flying notching and shearing machine
CN112387786A (zh) * 2020-11-04 2021-02-23 河钢股份有限公司承德分公司 飞剪剪切方法、装置及飞剪设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728040A (en) * 1951-05-08 1955-12-20 Westinghouse Electric Corp Control system for flying crop shear motor
US3082368A (en) * 1960-04-07 1963-03-19 Westinghouse Electric Corp Motor control apparatus
US3165020A (en) * 1963-03-08 1965-01-12 Morgan Construction Co Automatic tail end cropping device
US3170355A (en) * 1961-09-01 1965-02-23 Morgan Construction Co Maximum and minimum length control for a rolling mill shear

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4926551A (enExample) * 1972-07-06 1974-03-09

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728040A (en) * 1951-05-08 1955-12-20 Westinghouse Electric Corp Control system for flying crop shear motor
US3082368A (en) * 1960-04-07 1963-03-19 Westinghouse Electric Corp Motor control apparatus
US3170355A (en) * 1961-09-01 1965-02-23 Morgan Construction Co Maximum and minimum length control for a rolling mill shear
US3165020A (en) * 1963-03-08 1965-01-12 Morgan Construction Co Automatic tail end cropping device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141266A (en) * 1976-04-28 1979-02-27 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Drum type flying shears
US6216756B1 (en) 1999-03-22 2001-04-17 Howard Carl Mason Log processing apparatus
US8402870B1 (en) 2008-11-13 2013-03-26 Michael S. Marquette Multi-function flying notching and shearing machine
CN112387786A (zh) * 2020-11-04 2021-02-23 河钢股份有限公司承德分公司 飞剪剪切方法、装置及飞剪设备

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Publication number Publication date
GB1325366A (en) 1973-08-01
JPS5118671B1 (enExample) 1976-06-11
CA931870A (en) 1973-08-14

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AS Assignment

Owner name: PITTSBURGH NATIONAL BANK

Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP.OF OH;REEL/FRAME:004458/0765

Effective date: 19850610

AS Assignment

Owner name: PITTSBURGH NATIONAL BANK,PENNSYLVANIA

Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307

Effective date: 19860630

Owner name: PITTSBURGH NATIONAL BANK

Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307

Effective date: 19860630

AS Assignment

Owner name: WEAN UNITED, INC.

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:PITTSBURGH NATIONAL BANK;REEL/FRAME:004925/0218

Effective date: 19880509

AS Assignment

Owner name: UNITED ENGINEERING ROLLING MILLS, INC.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WEAN INCORPORATED;REEL/FRAME:004920/0256

Effective date: 19880610