US3439517A - Control and driving system for straightening and cutting machines - Google Patents

Control and driving system for straightening and cutting machines Download PDF

Info

Publication number
US3439517A
US3439517A US656254A US3439517DA US3439517A US 3439517 A US3439517 A US 3439517A US 656254 A US656254 A US 656254A US 3439517D A US3439517D A US 3439517DA US 3439517 A US3439517 A US 3439517A
Authority
US
United States
Prior art keywords
motor
hydraulic
straightening
sheet
conduits
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
Application number
US656254A
Other languages
English (en)
Inventor
Curt Munchbach
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3439517A publication Critical patent/US3439517A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • a driving system for a sheet straightening and cutting device including a single hydraulic motor energized by hydraulic fluid introduced into and withdrawn from said motor by means of a hydraulic conduit of large cross-section and a hydraulic conduit of small cross-section.
  • Workpiece operated sensors actuate appropriate valves (1) to circulate the fluid in the conduit of large cross-section for operating the motor at normal speed; (2) to circulate the fluid in the conduit of small cross-section for operating the motor at creeping speed, and (3) to prevent circulation of the fluid in either conduit for (a) stopping the motor, and (b) energizing the cutting device.
  • This invention relates to machines including a straightening device and a cutting mechanism for sheet material of indefinite length taken from a supply roll. More particularly, the invention concerns a novel, simplified and economical drive control system for changing the normal conveying speed of the advancing sheet to a creeping speed and subsequently to a full stop immediately prior to and during the cutting operation and for actuating the cutting mechanism responsive to said stoppage.
  • the type of machine with which the novel control system is associated is well known in the art. It comprises a series of straightening rolls between which the sheetusually of metalpasses and an adjacent sheet cutting mechanism which, by means of shears, periodically severs definite lengths from the sheet emerging from the straightening rolls and advanced thereby. It has further been recognized that for ensuring precise desired lengths of the cut pieces, it is not sufiicient to merely stop the sheet in its motion but to slow it down first to a creeping speed immediately prior to stoppage.
  • the straightening rolls are driven at their normal conveying speed through a differential gear means by a large electric motor provided with an electromagnetic clutch arrangement and functioning as the principal driving means.
  • the rolls are driven by a small electric motor provided with a brake mechanism and functioning as an auxiliary driving means.
  • An arrangement such as the one outlined above is, on the one hand, very expensive and requires, on the other hand, substantial space laterally of the straightening mechanism to accommodate the diflFerential gear means and both motors which must be combined with clutches and brakes.
  • the straight- 3,439,517 Patented Apr. 22, 1969 ening and cutting machine is, at either speed (conveying speed or creeping speed), driven by a single hydraulic motor which is energized by a hydraulic pump connected to the motor by means of two hydraulic circuits controllable in a known manner.
  • One of the circuits is formed by a hydraulic conduit having a small cross-section and associated with the creeping speed, while the other circuit is formed by a hydraulic conduit having a large crosssection associated with the normal conveying speed.
  • FIG. 1 is a schematic side elevational view in section of a straightening and cutting machine used in accordance with the invention.
  • FIG. 2 is a diagram of the novel hydraulic drive and control system associated with the machine shown in FIG. 1.
  • FIG. 1 there is schematically shown a sheet straightening mechanism 1 including a series of straightening rolls 2.
  • the rolls 2 also serve to unwind the sheet material 3 from a supply roll 3a and advance the straightened sheet to a fixedly stationed cutting mechanism 4, the lower shear 4a of which is operated by the piston rod 18a of a hydraulically-actuated cylinder 18.
  • a photoelectric cell 5 as start contact and thereafter a photoelectric cell 6 as stop contact, the utility of which will become apparent as the description progresses.
  • conduits 21, 15 arranged to convey a hydraulic fluid, as well as return conduits 17, 17.
  • Conduits 21, 17' constitute a first hydraulic circuit having a large cross-section to circulate hydraulic fluid necessary for maintaining a normal motor speed, while conduits 15, 17 constitute a second hydraulic circuit having a smaller cross-section to circulate hydraulic fluid necessary for maintaining a creeping speed of motor 8.
  • Conduits 15, 17 include solenoid blocking valves 23, 24, respectively, while conduits 21, 17 include respective solenoid blocking valves 13, 14.
  • Conduit 15 further includes a metering valve 16.
  • Conduits 15, 17 are directly connected to conduits 12, 26, respectively, while conduits 21, 17' communicate with conduits 12, 26 by means of a distributor valve 25,
  • the supply conduit 12 is connected to a hydraulic fluid pump 7 while return conduit 26 communicates with the storage tank 10 associated with pump 7.
  • valves 13, 23, 14 and 24 In the open position of valves 13, 23, 14 and 24 the hydraulic motor 8 is supplied with a flow of hydraulic fluid suflicient to operate it at the normal conveying speed and rolls 2 are thus driven by motor 8 accordingly. Consequently, the rolls 2 forward the metal sheet 3 through the open cutting mechanism 4 at a normal conveying speed. When the leading edge of the sheet reaches photocell 5, the latter transmits a signal to close solenoid valves 13 and 14 thus blocking the main flow across motor 8. Valves 23 and 24 remain open so that the motor continues to be supplied with fluid through the hydraulic circuit formed by conduits 15, 17.
  • conduits 13, 17' have a smaller cross-section than that of conduits 13, 17' so that the amount of hydraulic fluid now being circulated through motor 8 is, e.g., only of the amount supplied when valves 13, 14 are open. Consequently, the speed of motor 8 will drop to its creeping speed, in this instance approximately /20 of the normal conveying speed.
  • the sheet 3 will now be advanced by rolls 2 at a creeping speed up to the point where the leading edge of sheet 3 reaches the photocell 6.
  • photocell 6 transmits a signal to close solenoid valves 23, 24, thus cutting off entirely the circulation of the hydraulic fluid through motor 8, deenergizing the same, and thus stopping the advance of sheet 3 in the desired cutting position.
  • a hydraulic motor for driving said straightening mechanism, a hydraulic pump operatively connected to said motor by a plurality of conduits, said conduits forming a first hydraulic circuit adapted to circulate a relatively large amount of fluid through said motor, said conduits forming a second hydraulic circuit adapted to circulate a relatively small amount of fluid through said motor, first valve means in said first circuit and second valve means in said second circuit, said motor operable at a relatively high conveying speed when all said valves are in an open position, sensing means associated with said first and second valve means and adapted upon detection of at least one predetermined position of said sheet to first close said first valve means causing said motor to assume a relatively low creeping speed and to subsequently close said second valve means to cut ofi the circulation of fluid through said motor causing the same to stop.
  • sensing means includes a first photocell associated with said first valve means and a second photocell spaced from said first photocell in the direction of travel of said sheet and associated with said second valve means.
  • said sensing means includes a photocell having a first energizing circuit associated with said first valve means and a second energizing circuit associated with said second valve means, said first circuit adapted to instantaneously transmit actuating signals to said first valve means upon said detection, said second circuit adapted to transmit actuating signals to said second valve means after a time delay subsequent to said detection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
US656254A 1966-08-20 1967-07-26 Control and driving system for straightening and cutting machines Expired - Lifetime US3439517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1552110A DE1552110C3 (de) 1966-08-20 1966-08-20 Band-Richt- und Zerteilanlage

Publications (1)

Publication Number Publication Date
US3439517A true US3439517A (en) 1969-04-22

Family

ID=7568182

Family Applications (1)

Application Number Title Priority Date Filing Date
US656254A Expired - Lifetime US3439517A (en) 1966-08-20 1967-07-26 Control and driving system for straightening and cutting machines

Country Status (6)

Country Link
US (1) US3439517A (de)
AT (1) AT264968B (de)
BE (1) BE702803A (de)
DE (1) DE1552110C3 (de)
FR (1) FR1510956A (de)
GB (1) GB1113548A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757552A (en) * 1970-12-22 1973-09-11 Evg Entwicklung Verwert Ges Machine for straightening and cutting metal wire or strip into pieces
US4135378A (en) * 1976-11-26 1979-01-23 Amp Incorporated Wire feeding means
FR2818563A1 (fr) * 2000-12-27 2002-06-28 Usinor Procede de regulation en temps reel d'une planeuse
CN114798904A (zh) * 2021-01-19 2022-07-29 北京永成联合新型板材有限公司 一种平锁扣板加工设备及加工工艺
CN117682154A (zh) * 2023-12-29 2024-03-12 中重科技(天津)股份有限公司 一种型钢打包带送带矫直剪切装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2366023A1 (de) * 1973-07-21 1977-07-28 Tokyu Car Corp Vorrichtung zum hochgeschwindigkeitsumformen von hohlzylindrischen metallischen werkstuecken
JPS5629243A (en) * 1979-08-15 1981-03-24 Fuji Photo Film Co Ltd Laminating method for photosensitive printing plate
DE19605724C2 (de) * 1996-02-16 2001-04-12 Mannesmann Sachs Ag Schneideinrichtung zum Schneiden von metallischem Bandmaterial
CN121199198B (zh) * 2025-11-28 2026-04-03 江苏捷服科技有限公司 一种冷轧钢板高速纵剪分条装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835589A (en) * 1929-04-09 1931-12-08 Owen Automatic Spring Machiner Means for forming coil springs
US3180122A (en) * 1962-02-06 1965-04-27 United States Steel Corp Sheet classifier
US3347073A (en) * 1964-04-28 1967-10-17 George A E Couture Straightening machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835589A (en) * 1929-04-09 1931-12-08 Owen Automatic Spring Machiner Means for forming coil springs
US3180122A (en) * 1962-02-06 1965-04-27 United States Steel Corp Sheet classifier
US3347073A (en) * 1964-04-28 1967-10-17 George A E Couture Straightening machine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757552A (en) * 1970-12-22 1973-09-11 Evg Entwicklung Verwert Ges Machine for straightening and cutting metal wire or strip into pieces
US4135378A (en) * 1976-11-26 1979-01-23 Amp Incorporated Wire feeding means
FR2818563A1 (fr) * 2000-12-27 2002-06-28 Usinor Procede de regulation en temps reel d'une planeuse
WO2002051563A1 (fr) * 2000-12-27 2002-07-04 Usinor Procede de regulation en temps reel d'une planeuse
US20040069035A1 (en) * 2000-12-27 2004-04-15 Jacques-Yves Bourgon Method for real-time adjustment of a planisher
US7032420B2 (en) 2000-12-27 2006-04-25 Usinor Method for real-time adjustment of a planisher
CZ305184B6 (cs) * 2000-12-27 2015-06-03 Usinor Způsob regulování rovnačky a zařízení pro provádění tohoto způsobu
CN114798904A (zh) * 2021-01-19 2022-07-29 北京永成联合新型板材有限公司 一种平锁扣板加工设备及加工工艺
CN114798904B (zh) * 2021-01-19 2024-05-10 北京永成联合新型板材有限公司 一种平锁扣板加工设备及加工工艺
CN117682154A (zh) * 2023-12-29 2024-03-12 中重科技(天津)股份有限公司 一种型钢打包带送带矫直剪切装置

Also Published As

Publication number Publication date
GB1113548A (en) 1968-05-15
FR1510956A (fr) 1968-01-26
DE1552110C3 (de) 1978-05-03
DE1552110B2 (de) 1977-09-01
DE1552110A1 (de) 1970-02-19
BE702803A (de) 1968-01-15
AT264968B (de) 1968-09-25

Similar Documents

Publication Publication Date Title
US3251255A (en) Flying cutoff
US4655067A (en) Panel forming line
US3978703A (en) Automatic strip cutter
GB1147255A (en) Control system for grinding machines
US2219811A (en) Rod straightening and handling mechanism for headers
US3156150A (en) Apparatus for acting on continuously advancing elongated material
US3989576A (en) Apparatus for connecting a first web of a web form material, which web unwinds from a first roll, to the lead end of a second web of a web-form material, which web unwinds from a second roll
US2758837A (en) Hydraulically powered rack and pinion feeding mechanism
US4350276A (en) Arrangement for aligning a material web, particularly a veneer web
US3081657A (en) Longitudinally reciprocating measuring means and strip treating apparatus
GB1444275A (en) Web feeding apparatus
EP0420820B1 (de) Verfahren und Vorrichtung zum Einziehen von Draht in eine Scherstation einer Umformpresse
GB1086379A (en) Power-operated screw press
US3771703A (en) Hydraulic rotary strip stock feeder
US3172313A (en) Strip rolling apparatus
US3782618A (en) Stock feeding device
US4052880A (en) Pipe perforating machine
US2737834A (en) Automatic conveyor system for billets
US2800327A (en) Strip feeding line
US3373642A (en) Hydraulically regulated workpiece accelerating device
US2347261A (en) Power transmission
GB1113548A (en) Improvements in or relating to installations for straightening and dividing sheet metal strips or bands
US4187587A (en) Textile machine having hydraulically controlled drafting rollers
US4091650A (en) Rolling mill for forming seamless tubes, and seamless tube-making apparatus comprising such a mill
US4295353A (en) Mill stand for forming discontinuous longitudinal deformations in sheet metal