EP0035462A2 - Commande électrique cyclique pour un dispositif de coupe de papiers fins et revêtus - Google Patents

Commande électrique cyclique pour un dispositif de coupe de papiers fins et revêtus Download PDF

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Publication number
EP0035462A2
EP0035462A2 EP19810630010 EP81630010A EP0035462A2 EP 0035462 A2 EP0035462 A2 EP 0035462A2 EP 19810630010 EP19810630010 EP 19810630010 EP 81630010 A EP81630010 A EP 81630010A EP 0035462 A2 EP0035462 A2 EP 0035462A2
Authority
EP
European Patent Office
Prior art keywords
knife
web
motor
velocity
drums
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.)
Withdrawn
Application number
EP19810630010
Other languages
German (de)
English (en)
Inventor
Donald Charles Fitzpatrick
Donald Robert Grody
Gerard Allen Guilg
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.)
Beloit Corp
Original Assignee
Beloit Corp
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 Beloit Corp filed Critical Beloit Corp
Publication of EP0035462A2 publication Critical patent/EP0035462A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed

Definitions

  • This invention relates in general to an electrical drive for cutting paper webbing.
  • double rotary knife sections which consist of two cylinders geared together each containing a knife which mates with another forming a scissor action to sever the web.
  • the knife tip velocity of the two knives must match the paper speed at the time the knives come into contact with the one another and the paper.
  • the circumference of the knife path can be made equal to the sheet length and thus at constant speed the knife tip velocity will match the paper speed at the time of cut.
  • Another prior art method is to provide a mechanical linkage comprised of eccentrics that will accelerate or decelerate the knife tip to match the sheet speed at the time of cut.
  • Such linkage is designated a drag link mechanism and the problems of inertia, wear, backlash and speed make such systems less accurate and very complicated.
  • the present invention utilizes a microprocessor which receives an input from a sheet speed sensor and an input from a position feedback detector which is connected to the output shaft of the drive motor for the cylindrical mounted knives and which includes a motor speed control which is controlled by the microprocessor to allow cuts of different sizes to be made.
  • the speed sensor and position feedback devices may be pulse generators.
  • cylinders having low inertia allows the motor control to vary the speed of the cylinders rapidly so as to make accurate cuts that can be maintained within plus
  • the electrical drive system of the invention allows the operator to set the sheet length desired on a control which might include digital thumb switches.
  • the sheet length is supplied to the microprocessor which chooses the computerized velocity and position curve which the knives must follow to cut the web after the required length of the material has passed.
  • the microprocessor receives signals from the:web speed sensor and position feedback from the output shaft of the motor and processes them with the input from the set sheet length by sending a signal to the motor speed regulator which in turn controls the motor.
  • the motor supplies from the position feedback sensor a digital position signal to the microprocessor which then recalculates the position that the knife should be in at that particular instance.
  • the computer continuously adjusts the speed of the motor so as to assure accurate control of the system.
  • Novel rotary drums of low inertia and having novel knife arrangements are also provided.
  • the present invention allows accuracy in cutting of sheets in the sheeting industry to within plus or minus 15 thousandths of an inch wherein the sheet speeds go up to 1200 feet per minute or higher.
  • Figure 1 illustrates the cutter of the invention comprising a web of sheet_material 10 as, for example, paper which passes through a pair of cutter rolls 14 and 16 each of which carry cutter blades 8 and 9 so that they cooperate to shear the paper as it passes by the rollers 14 and 16.
  • the cut sheets 11 are stacked in a pile 12 on a holder 13.
  • the roller 14 is supported on a shaft 17 and the roller 16 is supported on the shaft 18.
  • the shafts 17 and 18 carry gears 19 and 21, respectively, and a gear 22 meshes with gear 21 to drive it.
  • a motor 24 has an output shaft 23 which is connected to gear 22.
  • a suitable indexing means 25 which may be a photoelectric device is attached to motor 24.
  • a position feedback sensor 44 is mounted on shaft 23 as illustrated in Figure 1 to provide an index to indicate the position of the cutters 8 and 9 relative to the sheet 10.
  • a microprocessor 32 receives on lead 46 the output of the position sensor 44.
  • a digital sensor 42 which may be a pulse generator type is mounted adjacent the web 10 and detects the linear velocity of the paper web and sunnlies an output on lead 43 to the microprocessor 32 indicative of the velocity of the paper..
  • the microprocessor 32 also receives an input from a sheet length setting means 33 which has thumb knobs 34, 36 and 37 and indicators 38, 39 and 41 for setting the length of the sheets 12 to the desired dimension. In other words, the sheets 12 may be made shorter and longer by adjusting the knobs 34, 36 and 37.
  • the output of the sheet length setting means 33 is supplied to the microprocessor 32.
  • the blades 8 and 9 In operation, the blades 8 and 9 must have the same peripheral velocity as the sheet 10 at a time when the blades 8 and 9 engage the paper. Thus, the velocity of the blades 8 and 9 must equal the velocity of the paper during the cutting interval. If the length of the sheet is exactly equal to the circumference of the rollers 14 and 16, the rollers 14 and 16 can be run at a constant speed such that their peripheral speed is equal to the speed of the web 10.
  • the knives 8 and 9 should travel at the peripheral speed which equals the speed of the web 10 during the instant of cutting but the rollers 14 and 16 should slow down between the cutting instances until the proper length of the sheets 12 has passed by the roller then the rollers 14 and 16 must be accelerated up to the web speed at the instant of putting so the motion of the rollers 14 and 16 will be non-linear and will be as shown by curve 70 in Figure 4 which is a plot of velocity of the blades 8 and 9 relative to time.
  • the portions of the curves 71 and 72 correspond to the instant of cutoff when the blades 8 and 9 engage the web 10 and the curve 70 indicates a velocity plot wherein the sheets are to be longer than the circumference of the rollers 14 and 16.
  • the motor 24 receives an input from a motor speed control 26 which receives input power on leads 27, 28 and 29 as, for example, three phase AC power.
  • the microprocessor 32 supplies an input to the motor speed control 26 for controlling the motor speed control which in turn adjusts the rotary speed of the motor according to the desired sheet size set by the knobs 34,36 and 37.
  • Figure 3 comprises a flow diagram which explains the calculations made by the microprocessor 32.
  • the sheet size is set as indicated by. block 50 by adjusting the knobs 34, 36 and 37 to the desired sheet size.
  • the sheet velocity is sensed as indicated by a block 51 and then the time between cutoffs is determined as indicated block 52.
  • the position of the roller knives is sensed as indicated by a block 53 and the velocity of the rollers 14 and 16 is controlled by modulating the roller velocity by control of the motor 24 such that at cutoff the knives have the same peripheral velocity as the sheet as indicated by block 54.
  • Block 56 indicates that the roller velocity is changed to correspond to the selected sheet size.
  • the present invention is capable of cutoff lengths having accuracies of plus or minus 15 thousandths of an inch at speeds up to 1200 feet per minute.
  • An additional important aspect of the invention comprises the specially designed rotary drums which allows machine control with the invention to operate at much higher speeds than possible with apparatus of the prior art.
  • the microprocessor which controls the electric drives optimizes acceleration and deceleration of the drums and the specially designed low inertia drums of the invention allows the acceleration and deceleration to be accomplished with reasonable amounts of power whereas the heavy drums used in prior art devices would make it impossible to obtain the accelerations and decderations necessary for operation of the invention at the high speeds required.
  • Prior art drums were either cast drums or made of heavy wall steel tubes for rigidity.
  • Figures 5 and 6 illustrate the low inertia drums of the invention which are formed of cylindrical shels 80 and 120 for the upper drum 14 and the lower drum 16, respectively.
  • the upper drum 14 is shown in greater detail in Figure 6 and in section and the general structures of both the upper and lower drums 14 and 16 are similar and only the upper drum is shown in section for explanation.
  • a pair of hub members 81 and 82 which are formed with inner hollow spaces so as to reduce the weight are respectively attached to the supporting shafts 17a and 17b which are supported in suitable bearings so that the upper and lower rolls 14 and 16 can be driven in synchronism.
  • Attached to the hubs 81 and 82 are a pair of supporting members 83 and 91 which are formed in X-shape cross-section as illustrated in Figure 5 and have portions 84, 88, 86, 89 and 87 and 90 which extend to the inner surface of the outer cylindrical shell 80 of the drum and between these portions the material is removed. so as to remove as much material and weight as possible and, thus, make the drum light so that it will have low inertia.
  • the ends 84,88, 86, 89, 87 and 90 are attached as by welding to the shell 80 so that a rigid structure is provided.
  • a counter-weight 101 is mounted and welded to the inner surface of the outer shell 80 as shown in Figure 5 and a tangential member 108 has opposite sides 106 and 107 connected to a truncated portion of the shell 80 and a knife 109 extends generally radially from the drum 80 and is carried on a bolt 111 that is threadedly received in the center portion 108 of the member 104 so as to allow the knife 109 to be adjustable to the left or right relative to Figure 5 which will cause the knife 109 to move radially relative to the drum since adjustment changes its position relative to the radius of the drum 80.
  • a second knife 97 is generally mounted tangentially with the bolt 98 to a member 96 mounted in the surface of drum 120 and is counter-balanced by a counter-weight 94 attached to the inside surface of the drum 120 as shown in Figure 5.
  • the low weight drums 14 and 16 can be very rapidly accelerated and decelerated due to their low wdght and inertia and the blades 109 and 97 can be adjusted for wear by using the adjustment means shown.
  • a gear box has been eliminated.
  • a pinion gear, coupled to the motor output shift is used to directly drive the connecting gears on the end of the cylinders.
  • Prior art used a separate gear box with input at output shifts and couplings. Our system further reduces inertia by such elimination of the prior art separate gear box.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Replacement Of Web Rolls (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP19810630010 1980-01-31 1981-01-30 Commande électrique cyclique pour un dispositif de coupe de papiers fins et revêtus Withdrawn EP0035462A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11720080A 1980-01-31 1980-01-31
US117200 1980-01-31

Publications (1)

Publication Number Publication Date
EP0035462A2 true EP0035462A2 (fr) 1981-09-09

Family

ID=22371474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810630010 Withdrawn EP0035462A2 (fr) 1980-01-31 1981-01-30 Commande électrique cyclique pour un dispositif de coupe de papiers fins et revêtus

Country Status (6)

Country Link
EP (1) EP0035462A2 (fr)
JP (2) JPS56119392A (fr)
AU (1) AU6683581A (fr)
ES (1) ES8205624A1 (fr)
FI (1) FI810219L (fr)
GB (1) GB2069465B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706863A3 (fr) * 1992-03-24 1996-11-20 Steinemann Ulrich Ag Procédé et dispositif pour la séparation de produits stratifiés
WO2000041858A1 (fr) * 1999-01-11 2000-07-20 Kabushiki Kaisha Yaskawa Denki Procede de commande d'outil rotatif de coupe a came electronique et procede de generation de courbe de came electronique
WO2002034484A1 (fr) * 2000-10-26 2002-05-02 Rexroth Indramat Gmbh Procede et dispositif servant a modifier l'etat d'engagement d'un outil dans une bande de matiere qui defile
EP1953106A2 (fr) * 2007-02-01 2008-08-06 manroland AG Unité de perforation oblique d'un appareil de pliage d'une presse et procédé de fonctionnement d'une unité de perforation oblique d'un appareil de pliage
EP1964804A2 (fr) * 2007-02-28 2008-09-03 manroland AG Unité de perforation oblique d'un appareil de pliage d'une presse et procédé de fonctionnement d'une unité de perforation oblique d'un appareil de pliage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548112A (en) * 1984-07-20 1985-10-22 Marquip, Inc. Web cutting
JPS62152695A (ja) * 1985-12-25 1987-07-07 ワイケイケイ株式会社 継ぎ目をもつた長尺製品の切断方法
DE3615033C3 (de) * 1986-05-02 2003-10-02 Impuls Appbau Jaeger & Sohn Gm Vorrichtung zum Ausbreiten von Stoffen
US4821061A (en) * 1987-02-20 1989-04-11 Standard Manufacturing Photofinishing packaging system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052919B2 (ja) * 1976-04-30 1985-11-21 東京電子工業株式会社 ロ−タリ−カツタ−の制御装置

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706863A3 (fr) * 1992-03-24 1996-11-20 Steinemann Ulrich Ag Procédé et dispositif pour la séparation de produits stratifiés
WO2000041858A1 (fr) * 1999-01-11 2000-07-20 Kabushiki Kaisha Yaskawa Denki Procede de commande d'outil rotatif de coupe a came electronique et procede de generation de courbe de came electronique
US6781339B1 (en) 1999-01-11 2004-08-24 Kabushiki Kaisha Yaskawa Denki Method of controlling an electronic cam type rotary cutter, and method of producing an electronic cam curve
WO2002034484A1 (fr) * 2000-10-26 2002-05-02 Rexroth Indramat Gmbh Procede et dispositif servant a modifier l'etat d'engagement d'un outil dans une bande de matiere qui defile
US7089078B2 (en) 2000-10-26 2006-08-08 Rexroth Indramat Gmbh Method and device for adjusting the degree of engagement of a tool with a web of a materail running past it
EP1953106A2 (fr) * 2007-02-01 2008-08-06 manroland AG Unité de perforation oblique d'un appareil de pliage d'une presse et procédé de fonctionnement d'une unité de perforation oblique d'un appareil de pliage
EP1953106A3 (fr) * 2007-02-01 2009-08-12 manroland AG Unité de perforation oblique d'un appareil de pliage d'une presse et procédé de fonctionnement d'une unité de perforation oblique d'un appareil de pliage
EP1964804A2 (fr) * 2007-02-28 2008-09-03 manroland AG Unité de perforation oblique d'un appareil de pliage d'une presse et procédé de fonctionnement d'une unité de perforation oblique d'un appareil de pliage
EP1964804A3 (fr) * 2007-02-28 2009-08-12 manroland AG Unité de perforation oblique d'un appareil de pliage d'une presse et procédé de fonctionnement d'une unité de perforation oblique d'un appareil de pliage

Also Published As

Publication number Publication date
AU6683581A (en) 1981-08-06
ES499512A0 (es) 1982-07-01
JPS56119392A (en) 1981-09-18
FI810219L (fi) 1981-08-01
JPS6150696U (fr) 1986-04-05
ES8205624A1 (es) 1982-07-01
GB2069465A (en) 1981-08-26
GB2069465B (en) 1983-10-12

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19820717

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GUILG, GERARD ALLEN

Inventor name: FITZPATRICK, DONALD CHARLES

Inventor name: GRODY, DONALD ROBERT