EP0242841B1 - Verfahren und Vorrichtung zum Einstellen der Presskraft des Pressbalkens einer Planschneidemaschine - Google Patents

Verfahren und Vorrichtung zum Einstellen der Presskraft des Pressbalkens einer Planschneidemaschine Download PDF

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Publication number
EP0242841B1
EP0242841B1 EP87105816A EP87105816A EP0242841B1 EP 0242841 B1 EP0242841 B1 EP 0242841B1 EP 87105816 A EP87105816 A EP 87105816A EP 87105816 A EP87105816 A EP 87105816A EP 0242841 B1 EP0242841 B1 EP 0242841B1
Authority
EP
European Patent Office
Prior art keywords
pressing force
width
characteristic
stack
parameters
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
EP87105816A
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German (de)
English (en)
French (fr)
Other versions
EP0242841A1 (de
Inventor
Wolfgang Mohr
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.)
Adolf Mohr Maschinenfabrik GmbH and Co KG
Original Assignee
Mohr Wolfgang
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 Mohr Wolfgang filed Critical Mohr Wolfgang
Publication of EP0242841A1 publication Critical patent/EP0242841A1/de
Application granted granted Critical
Publication of EP0242841B1 publication Critical patent/EP0242841B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/04—Means for holding or positioning work with clamping means providing adjustable clamping pressure
    • 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
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/025—Means for holding or positioning work with clamping means acting upon planar surfaces
    • 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
    • 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
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating 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
    • Y10T83/162—With control means responsive to replaceable or selectable information program
    • Y10T83/173—Arithmetically determined program
    • Y10T83/175—With condition sensor
    • Y10T83/178—Responsive to work
    • 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
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • 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
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • Y10T83/7547—Liquid pressure actuating means

Definitions

  • the invention relates to a method for adjusting the pressing force of the press beam of a face cutting machine according to the preamble of claim 1 and to an apparatus for performing this method according to the preamble of claim 8.
  • the cutting result depends, among other things, on the pressing force that the press beam exerts on the material to be cut during the cutting process. Too high a pressing force will damage the material on the stack surface. If the pressing force is too low, the material to be cut can shift due to the forces exerted by the knife during cutting.
  • the press force depends on the material properties; softer material to be cut usually requires a higher pressing force than harder material to be cut.
  • the format of the stack must also be taken into account; larger cutting widths require a higher pressing force than smaller cutting widths.
  • a pressing force adjusting device in which a plurality of scanning devices distributed over the entire knife length are provided in the area of the pressing beam in a straight row, each of which is arranged in the circuit of a lifting magnet.
  • the solenoids control a pressure regulator that influences the pressure of the pressure beam. While the pressing pressure is automatically set according to the length of the material to be cut in this way, additional manipulations are necessary to adapt the pressing pressure to the material to be cut.
  • the machine must therefore be set by means of a further, manually operated pressure regulator, or compression springs must be switched on or off. This leads to a rather complicated structure and to difficulties in linking the width-dependent pressure setting with the material-dependent pressure setting.
  • the invention has for its object to provide a method of the type described above, with the help of improved cutting results can be achieved quickly and accurately.
  • a characteristic curve which has different characteristic values for different widths, each associated with a pressing force, is stored as data, depending on the measured width, a characteristic value of a selected characteristic curve retrieved and from this the pressing force is derived.
  • the base value can be determined with a high degree of accuracy, for example by a test pressing or on the basis of stored empirical values from previous work with the same cutting material.
  • the width is measured in direct connection with the actuation of the press beam. Errors due to an insufficient estimate by the operator or an inadvertently missed readjustment of the pressing force do not occur. When dividing a large-format stack into smaller formats, no interruptions to readjust the pressing force are necessary because the changing of the pressing force takes place automatically. This saves a considerable amount of time.
  • pressing force parameters can be called up immediately after the width measurement. No arithmetic operations are therefore necessary.
  • these parameters can be machine-specific, can be selected taking into account all transfer functions in the control or regulating circuit. Since the characteristic values are only recorded as electrical data, simple storage results.
  • the base value for a certain material to be cut can be preselected with a maximum width and, to determine the pressing force, the base value can be reduced approximately in the ratio of the measured width to the maximum width. Since the base value corresponds to the greatest pressing force, any inaccuracies in the choice of the base value for smaller widths have a fraction of their size.
  • the latter can be achieved in a simple manner in that at least two characteristic values of each characteristic curve are determined in a learning mode by arbitrarily changing an auxiliary value corresponding to the characteristic values until the desired pressing force is reached and the auxiliary value thus obtained is stored as a characteristic value.
  • the desired pressing force can be read off a display, for example.
  • the characteristic value stored in this way takes into account the special properties of the machine and its press force setting.
  • the remaining stored characteristic values can be calculated from the characteristic values determined in the learning mode. This is especially true if the characteristic is a straight line.
  • the pressing force is preferably regulated as a function of a guide variable that changes depending on the width.
  • the feedback of the actual value during control results in particularly precise press force settings.
  • the characteristic values of the characteristic curve are expediently used as the reference variable.
  • the width of the stack be measured near the cut line. This ensures that the width that is subsequently to be cut is taken into account as a measured value in the setting of the pressing force.
  • the arrangement of the measuring device on the cutting table ensures that the current width dimension is included in the pressing force setting.
  • the control or regulating circuit is able to quickly adjust the pressing force thus imparted.
  • each sensor identifies a certain latitude, the number of responsive sensors can be used for the latitude measurement.
  • control or regulating circuit is very simple.
  • sensors in particular pushbuttons, change initiators, diffuse sensors or the like.
  • the measuring device should be located in the cutting table below the press beam. This gives the exact assignment of the press force to the stack width loaded by the press beam.
  • the device expediently also comprises a characteristic curve memory, from which characteristic values for guiding the control or regulating circuit can be called up depending on the width. This results in a very simple construction of the control or regulating circuit.
  • the pressure beam is loaded by a hydraulic piston-cylinder arrangement and the pressure supplied can be adjusted by means of a control valve which can be actuated as a function of a characteristic value called up.
  • a control unit that is connected on the input side to a basic value setting device, the stack width measuring device, the characteristic curve memory and an actual value feedback, and on the output side to the control input of the control valve.
  • a programmer can also be connected to the control unit, in which basic values and, if appropriate, width values are stored.
  • values of an earlier order can be stored so that they can be called up at the push of a button when a new order of the same type is carried out.
  • a face cutting machine 1 is schematically illustrated, the press beam 2 is movable up and down in stand guides 3.
  • the drive is operated by a direction-reversible piston-cylinder arrangement 4, the working pressure chamber 5 of which can be supplied with pressure fluid via a line 6.
  • the hydraulic fluid is conveyed from a container 8 by a pump 7.
  • the hydraulic pressure is set with a control valve 9, which is designed, for example, as a proportional valve.
  • a Cutting table 10 in which sensors 11 schematically indicated are accommodated in a row below the press beam 2. The number depends on the width of the cutting table and the desired accuracy of the width measurement.
  • the sensors are commercially available mechanical contacts (touch contacts), proximity initiators, light barriers or diffuse sensors, air nozzles with a dynamic pressure gauge or the like. As shown in FIGS. 2 and 3, stacks of material of different widths are cut on the face cutting machine 1. FIG. 2 shows a wide stack 12, FIG. 3 shows a stack 12a of smaller width. As a result, all 8 sensors are covered in FIG. 2, whereas only 3 sensors are covered in FIG. 3. The number N of sensors covered is therefore a measure of the width of the stack. The sensors 11 thus form a stack width measuring device 13. A width signal is output via the signal line, which is equal to the number N of the excited sensors 11.
  • a pressing force P 1 is required. If the same material to be cut is cut into a smaller format and now has, for example, the width of FIG. 3, a smaller pressing force is necessary in order to obtain the same surface pressure as in FIG. 2.
  • the pressing force P2 is approximately equal to 3/8 x P1.
  • FIG. 4 shows a family of characteristic curves, in which the pressing force P is illustrated over the number N of the excited sensors 11.
  • Basic values B are given on the left ordinate, which are for a specific cutting machine are optimal if a certain material to be cut is available as a stack of maximum width (see FIG. 2).
  • the characteristic curves run in a straight line up to a minimum pressing force C if only one sensor 11 is covered. From these, it can be seen which pressing forces are necessary if any intermediate width value has been measured for a given material to be cut (with a certain base value B and possibly an associated minimum value C).
  • These intermediate values of the pressing force are set automatically if one of the characteristic curves 14 has previously been selected on the basis of the basic value B associated with the material.
  • a control circuit 15 which has a control unit 16. Its first input 17 is connected to a basic value setting device 18. This has a selector switch 19 with which a characteristic curve 14 can be selected, the base value B of which corresponds to the material to be cut to be treated. A second switch 20 is used to switch the width-dependent influencing on or off. A second connection 21 is connected to a non-volatile characteristic curve memory 22, in which characteristic curves, similar to characteristic curves 14 in FIG. 4, are stored. In this case, it is sufficient to store individual characteristic values for each characteristic, corresponding to the points X in FIG. 4, which are each assigned a specific width, represented by the number of responsive sensors. Another input 23 receives the width signals from line 14. An input 24 receives signals via a converter 25 which correspond to the actual value of the pressure in line 6 and thus to the pressing force P. An outlet 26 is connected to the control valve 9.
  • a programmer 27 can be present, which takes the place of the basic value setting device 18 if the same material to be cut has been treated in an earlier processing and the values set at that time have been stored in the programmer.
  • a basic value associated with the material to be cut is first input using the basic value setting device 18.
  • Specific characteristic values X are called up from this characteristic curve as a function of the number N of responsive sensors 11.
  • the control valve 9 sets a specific pressure in the line 6 and thus a specific pressing force P.
  • a regulation results in which the required pressing pressure P is set precisely. If the stack width changes because the original large format has been divided, the pressing force automatically adapts to the smaller width, so that the surface pressure remains approximately constant.
  • a base value belonging to it can be selected with the help of the switch 19 and thus another characteristic curve in the memory 22.
  • the method of operation along this characteristic curve is the same as the method of operation just described.
  • a display device 29 is connected to the input 24 via a converter 28, from which the pressure in the line 6 or the pressing force P can be read.
  • the pressing force can also be changed with an auxiliary value transmitter 30.
  • You can change the auxiliary value so far until the display device 29 or a desired pressing force. indicates a desired hydraulic pressure. If one then transfers this auxiliary value into the characteristic curve memory 22, one is certain that a characteristic value has been stored which corresponds exactly to a defined pressing force in the cutting machine in question. In this way, the maximum values (corresponding to the basic values B) and the minimum values C can be determined and stored for all characteristic curves that are to be entered in the memory 22, while the characteristic values 23 in between can be calculated by a computer contained in the control unit 16. This ensures that the same structure of the control circuit 15 can be used for cutting machines of various sizes and types.
  • the setting of the basic value with the help of the switch 19 takes place on the basis of the experience gained in previous cutting processes or with the aid of a test pressing, in which it is determined how far the stack 12 can be compressed when a defined pressing force is applied.
  • Fig. 2 it is illustrated, for example, that a path a has been covered from the first touch of the stack 12, which can be determined, for example, with the aid of a button, until the press bar 2 comes to a standstill. Long distances require a higher pressing force to hold the stack securely, smaller distances require a lower pressing force.
  • FIG. 5 differs from that of FIG. 1 only in a different application of force to the press beam 2.
  • the control valve 9 acts on a one-sided loadable piston-cylinder arrangement 105, which is connected to the press beam 2 via mechanical transmission members 31 . These parts are returned to the rest position by a return spring 32 while relieving pressure.
  • a force transducer 33 for example a strain gauge, is provided in the transmission members, from which an actual value signal of the pressing force is sent to the control unit 16 via the line 34.
  • the remaining function corresponds to that of FIG. 1.
  • the learning mode can be carried out automatically by automatically actuating a specific pressing force from the auxiliary power generator 30 and, when the desired value is reached, the auxiliary value is automatically transferred to the memory 22 as a characteristic value. The transfer to the next adjustment is then also automatic. Such a learning mode only takes a few minutes.
  • the basic value is entered in the setting device 18 in coded form.
  • other known measuring devices could also be used, for example mechanical or optical devices which measure the distance between the stack sides.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Manufacture Of Motors, Generators (AREA)
EP87105816A 1986-04-24 1987-04-21 Verfahren und Vorrichtung zum Einstellen der Presskraft des Pressbalkens einer Planschneidemaschine Expired - Lifetime EP0242841B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3613835 1986-04-24
DE19863613835 DE3613835A1 (de) 1986-04-24 1986-04-24 Verfahren und vorrichtung zum einstellen der presskraft des pressbalkens einer planschneidemaschine

Publications (2)

Publication Number Publication Date
EP0242841A1 EP0242841A1 (de) 1987-10-28
EP0242841B1 true EP0242841B1 (de) 1991-10-02

Family

ID=6299409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105816A Expired - Lifetime EP0242841B1 (de) 1986-04-24 1987-04-21 Verfahren und Vorrichtung zum Einstellen der Presskraft des Pressbalkens einer Planschneidemaschine

Country Status (5)

Country Link
US (1) US4757731A (enrdf_load_stackoverflow)
EP (1) EP0242841B1 (enrdf_load_stackoverflow)
JP (1) JPS62259795A (enrdf_load_stackoverflow)
DE (2) DE3613835A1 (enrdf_load_stackoverflow)
ES (1) ES2026147T3 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4228651A1 (de) * 1992-08-28 1994-03-03 Wolfgang Mohr Verfahren und Vorrichtung zum Optimieren des Schneidevorganges bei einer Schneidemaschine
DE4228650A1 (de) * 1992-08-28 1994-03-03 Wolfgang Mohr Verfahren und Vorrichtung zum Optimieren der Schnittandeutung bei einer Schneidemaschine
DE4228649A1 (de) * 1992-08-28 1994-05-26 Wolfgang Mohr Verfahren und Vorrichtung zum Optimieren der Leerlaufzeit des Preßbalkens einer Schneidemaschine
DE4319148B4 (de) * 1993-06-09 2006-11-02 Bosch Rexroth Aktiengesellschaft Hydrozylinder, insbesondere zum Niederhalten eines Blechs auf einer Blechschere
JP2003071780A (ja) * 2001-09-04 2003-03-12 Horizon International Inc 押圧力制御装置を備えた用紙断裁機及び回し切り用紙断裁機
US20030121378A1 (en) * 2001-12-28 2003-07-03 Sirois Robert D. Diodometer
US7600454B2 (en) * 2005-04-12 2009-10-13 Johns Manville Fiber chopper and method of controlling force
DE102007041977B4 (de) 2007-09-05 2020-06-18 Perfecta Schneidemaschinenwerk Gmbh Bautzen Verfahren und Vorrichtung zum Pressen blattartiger Materialstapel beim Beschneiden in einer Schneidemaschine
CN102699945A (zh) * 2012-05-29 2012-10-03 浙江华岳包装机械有限公司 压纸器压力自动控制机构
TWI537201B (zh) * 2013-07-03 2016-06-11 Chan Li Machinery Co Ltd Paper stacking height compression mechanism and paper stack height control method for paper products
US10280564B2 (en) 2014-09-26 2019-05-07 Opensoft, Inc. Cutting machine
JP6996664B2 (ja) * 2019-09-30 2022-01-17 大日本印刷株式会社 化粧材の製造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093774B (de) * 1956-08-16 1960-12-01 Leipziger Buchbindereimaschine Schneidemaschine fuer Papier und Pappe

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US2122186A (en) * 1937-04-06 1938-06-28 Southworth Edward Round-cornering machine
US2570873A (en) * 1946-05-31 1951-10-09 E P Lawson Co Inc Paper cutter
US2621733A (en) * 1947-07-17 1952-12-16 E P Lawson Company Inc Clamp and knife drive mechanism
US2781844A (en) * 1954-06-25 1957-02-19 Pacific Ind Mfg Co Hydraulic hold-down for reciprocating ram
DE1122039B (de) * 1957-12-09 1962-01-18 Miehle Goss Dexter Inc Pressbalken fuer Papierschneidemaschinen
DE2604212C3 (de) * 1976-02-04 1985-06-05 H. Wohlenberg KG - GmbH & Co, 3000 Hannover Vorrichtung zur Herabsetzung der Preßbalkendruckkraft bei einer Papierschneidemaschine während der Schnittandeutung
DE3039983C2 (de) * 1980-10-23 1984-04-05 Jagenberg-Werke AG, 4000 Düsseldorf Verfahren beim Betrieb einer Querschneidanlage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093774B (de) * 1956-08-16 1960-12-01 Leipziger Buchbindereimaschine Schneidemaschine fuer Papier und Pappe

Also Published As

Publication number Publication date
DE3613835C2 (enrdf_load_stackoverflow) 1988-10-13
DE3773423D1 (de) 1991-11-07
JPS62259795A (ja) 1987-11-12
DE3613835A1 (de) 1987-10-29
JPH048197B2 (enrdf_load_stackoverflow) 1992-02-14
US4757731A (en) 1988-07-19
EP0242841A1 (de) 1987-10-28
ES2026147T3 (es) 1992-04-16

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