Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
  • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
  • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
  • B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
  • B65H23/185—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations motor-controlled
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
  • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
  • B65H23/195—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations
  • B65H23/198—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations motor-controlled (Controlling electrical drive motors therefor)
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2403/00—Power transmission; Driving means
  • B65H2403/90—Machine drive
  • B65H2403/94—Other features of machine drive
• • 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

• the present invention relates to a plant providing for the processing of laminated material or in general sheet material coming from a coil of the same material.
• Plants are known, which provide for carrying out various processing operations on laminated or sheet material coming from a coil of the same material.
• plants are known, which provide for cutting the laminated material according to the shape and sizes required.
• a supply station of the laminated material wound onto a coil which provides for supporting the laminated material wound onto a coil on a mandrel and for releasing it by unwinding;
• a cutting station of the laminated material which provides for cutting the laminated material according to the shape and sizes required;
• the storage station can be a rewinding station onto the coil of the cut material.
• the cut laminated material is rewound on a cylindrical core supported by a mandrel.
• braking means act on the coil of laminated material to be unwound, and act on the cut laminated material before it is wound on the cylindrical core.
• the braking can be of a friction mechanical type, or a hydraulic type, or another type.
• the object of the present invention is to propose a plant for processing laminated material from a coil, which sensibly reduces the energy consumption involved by such type of plant.
• Such an object is achieved by a plant for processing laminated material or in general sheet material from a coil in accordance with the claim 1.
• Fig. 1 schematically illustrates a plant for processing a metal laminate from a coil, according to the invention
• Fig. 2 schematically shows a control system of the plant of Fig. 1.
• the plant illustrated in Fig. 1 is specifically intended to longitudinally cut a steel laminate that is wound onto a coil in the plant, and rewound, again onto the coil, once it has been cut.
• the illustrated plant provides for a supply station 10, a guiding station 20, a cutting station 30, a braking station 40 and a rewinding station 50.
• a swarf winding station is also provided for, which is not shown.
• the supply station 10 provides a mandrel 11 supporting the steel laminate coil, indicated by A, and further provides a series of hydraulic members of a known type for moving the coil A, not shown.
• an asynchronous motor/electric generator 12 acting on the mandrel 11 is provided for.
• the guiding station 20 comprises a tiltable guide plane 21 and guide rollers, which are not shown.
• the cutting station 30 comprises opposite circular cutting blades 31 that are interspersed with coaxial rubber rollers for advancing the metal laminate.
• the circular cutting blades 31 with the rubber rollers are actuated by an electric motor.
• the braking station 40 provides a pair of braked rollers 41 acting in an opposite manner on the steel laminate and that are actuated by an asynchronous motor/electric generator 42.
• the rewinding station 50 provides a mandrel 51 provided with a cylindrical core on which the longitudinally cut steel laminate is rewound.
• an electric motor is provided for, which is not shown.
• a series of hydraulic members of a known type, not shown, is provided for, in order to move the coil of cut and rewound steel laminate, indicated by B.
• Fig. 2 the drive and control system of the two asynchronous motors/electric generators 12 and 42 is illustrated.
• the electrical network of the plant is indicated by a block V in the scheme.
• the motor/electric generator 12 is connected to an angular transducer 13 that provides in output an electric signal according to the angular position of the rotating axis of the motor/electric generator 12.
• the motor/electric generator 42 is connected to an angular transducer 43 thereof.
• the motor/electric generator 12 is driven by a feeding inverter 14 that is connected to both the motor/electric generator 12 and the angular transducer 13.
• the motor/electric generator 42 is driven by a feeding inverter 44 that is connected to both the motor/electric generator 42 and the angular transducer 43.
• a regenerating inverter 45 in turn connected to the electrical network V, is connected to the feeding inverter 44.
• an electronic drive and control unit 100 is provided for, which is provided with a display 101 , which is connected to the inverters 14,15,44,45.
• the steel laminate coil A is loaded and secured onto the mandrel 11 through the special hydraulic members.
• the coil A In the preliminary and preparative step, once the coil A has been loaded, it is unwound by the asynchronous electric motor/generator 12 to send it to the processing.
• the operator gives the command to unwind to the feeding inverter 14 supplying the motor/electric generator 12 with the suitable voltage and frequency.
• the movement of the motor/electric generator 12 is under the control of the unit 100, through the angular transducer 13, via the inverter 14.
• the metal laminate indicated by L, is passed though the rollers 41 .
• the operator gives the command to actuate the rollers to the feeding inverter 44 supplying the motor/electric generator 42 with the suitable voltage and frequency.
• the movement of the motor/electric generator 44 is under the control of the unit 100, through the angular transducer 43, via the inverter 44.
• the unwound metal laminate passes on the guide plane 21 and passes through the guide rollers of the guiding station 20.
• the laminate L is cut longitudinally by the circular blades 31 that are actuated by their electric motor.
• the rubber rollers, mounted coaxially and integrally to the circular blades 31 provide for pulling the laminate L, thus unwinding the coil A.
• the asynchronous motor/electric generator 12 is supplied by the feeding inverter 14 with a suitable voltage and frequency, so as to exert a braking action on the mandrel 1 1 supporting the coil A.
• the motor/electric generator 12 is dragged by the coil A, which unwinds, thereby making the motor to act as the electric generator.
• the regenerating inverter 15 receives the electric energy produced by the electric generator, suitably filtering it and putting it back into the electrical network V.
• the angular transducer 3 provides the angular speed data of the motor/electric generator 12 to the inverter 14, so that the unit 100 can manage in an optimal manner the stretch of the laminate according to the decreasing diameter of the coil being unwound.
• the laminate L After cutting the laminate L, it is rewound, as longitudinally cut, onto the core mounted on the mandrel 51 due to the action of its electric motor, to form the coil B.
• the output speed of the laminate L from the cutting station 30, and the rewinding speed of the coil B, are adjusted so that at the output from the cutting station 30, the laminate L forms a large loop before entering the braking station 40, to compensate for the thickness differences among the different laminate sections.
• the laminate L is braked in such a manner as to create the proper stretch to properly rewind the laminate L in the next rewinding station 50.
• the asynchronous electric motor 42 is supplied by the feeding inverter 44 with suitable voltage and frequency, in such a manner as to exert a braking action on the rollers 41 through which the laminate L passes.
• the electric motor 42 is dragged by the rotating rollers 41 , and acts as an electric generator.
• the regenerating inverter 45 receives the electric energy produced by the electric generator, suitably filtering it and putting it back into the electrical network V.
• the angular transducer 43 provides the angular speed data of the motor/electric generator 42 to the inverter 44 so that the unit 100 can manage in an optimal manner the stretch of the laminate L according to the increasing diameter of the coil being wound.
• the electronic drive and control unit 100 provides for driving and controlling all the sequences of operations described above. All the useful pieces of information about the processing procedure, and in particular the recovered electric energy, are displayed on the display 101. The generation of energy during braking allows a considerable energy saving. In fact, most of the braking energy is recovered in the form of electric energy, which is recirculated into the electrical network, so as to sensibly reduce the real electric energy consumption of the plant.
• Another advantage is that the consumption of friction material that is necessary in the known plants using a friction braking mechanism is prevented.
• a further advantage is that for the electric braking, already existing electric motors to move in the initial steps the loaded laminate coil and the braking rollers are used.
• the cutting plant may have other and/or different processing stations compared to those described above.
• the same principles can be applied to plants for cutting other types of materials from a coil, for example, to cut paper.
• the same principles can be applied to plants for any type of processing of laminated material or in general sheet material in which a braking action on the laminate sheet is required.
• the processed material may not be rewound onto a coil, but stored otherwise, according to the type of processing. For example, when it is cut in single sheets, it can be stacked. In this case, the generation of electric energy is due only to the braking of the mandrel supporting the coil being unwound, thus before the cross cutting of the material into single sheets.

Landscapes

• Unwinding Webs (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Family Cites Families (8)

• 2012
  • 2012-07-24 IT IT001285A patent/ITMI20121285A1/it unknown
  • 2012-10-08 WO PCT/IB2012/055428 patent/WO2014016654A1/en active Application Filing
  • 2012-10-08 EP EP12797973.0A patent/EP2877417A1/en not_active Withdrawn
  • 2012-10-08 CN CN201280074849.2A patent/CN104487369A/zh active Pending
• 2015
  • 2015-05-11 HK HK15104433.0A patent/HK1207616A1/xx unknown

Non-Patent Citations (2)

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