EP0626234B1 - Procédé et dispositif pour réaflûter les couteaux d'un broyeur - Google Patents

Procédé et dispositif pour réaflûter les couteaux d'un broyeur Download PDF

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Publication number
EP0626234B1
EP0626234B1 EP94103827A EP94103827A EP0626234B1 EP 0626234 B1 EP0626234 B1 EP 0626234B1 EP 94103827 A EP94103827 A EP 94103827A EP 94103827 A EP94103827 A EP 94103827A EP 0626234 B1 EP0626234 B1 EP 0626234B1
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EP
European Patent Office
Prior art keywords
knife
knives
accordance
grinding
wear
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
EP94103827A
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German (de)
English (en)
Other versions
EP0626234A3 (en
EP0626234A2 (fr
Inventor
Wilhelm Pallmann
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.)
Pallmann Maschinenfabrik GmbH and Co KG
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Pallmann Maschinenfabrik GmbH and Co KG
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Publication date
Application filed by Pallmann Maschinenfabrik GmbH and Co KG filed Critical Pallmann Maschinenfabrik GmbH and Co KG
Publication of EP0626234A2 publication Critical patent/EP0626234A2/fr
Publication of EP0626234A3 publication Critical patent/EP0626234A3/de
Application granted granted Critical
Publication of EP0626234B1 publication Critical patent/EP0626234B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/363—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of blades mounted on a turning drum

Definitions

  • the knives installed in cylindrical tool carriers of shredding machines are subject to rapid wear, so that they often have to be removed and replaced with sharpened ones.
  • Such shredding machines are e.g. Chipper for processing wood into industrially processable chips.
  • the service life of the cutting knives which are usually installed in knife rings, is usually only a few hours. They therefore have to be changed several times in one work shift, which adds up to around a thousand knife changes in one year.
  • each knife has so far been releasably connected to a holding plate which has a reference surface which is decisive for the cutting board, which in turn comes into contact with a corresponding reference surface provided on the knife carriers of the knife ring when the knife package consisting of knife and knife holding plate is installed. In this way, a reproducible cutting board is guaranteed compared to the original condition of the cylindrical inner wall of the knife ring, but this is the respective one local wear condition of the inner wall is not taken into account.
  • DE 41 14 840 A 1 has already proposed a method and a device with which the replacement of the knives while simultaneously adjusting the knife edges is made possible fully automatically, taking into account the respective state of wear of the wear shoes. This eliminates the laborious handling of the knife packages when removing and installing the knives, but the removed knives still have to be sharpened individually or in groups in special grinding machines.
  • the invention is therefore based on the object of also dispensing with this costly work step, without, however, having to forego the achievement of an exact cutting edge board that is matched to the respective state of wear of the wear shoes.
  • the resharpening device consists of a machine frame 1 on which a horizontal device table 2 is attached. This is rigidly connected to a circular vertical support plate 3, the part of the device table 2 projecting above the support plate 3 being provided with support brackets 4.
  • the support plate 3 has a larger opening 5 above the appliance table 2.
  • a turntable 6 is mounted, which is connected to an axially perpendicular turntable 7 for the central fastening of a knife ring 8.
  • the turntable 6 is rotated by a pinion 9, the drive motor 10 of which is arranged on an upper platform 11 of the machine frame 1.
  • the machine frame 1 is surrounded by a protective housing 12, which is shown only in FIG. 2 with a clear view of the parts essential to the invention.
  • a pneumatically actuated locking unit 13 is attached to the protective housing 12, the locking bolt 13 'of which, when the knife ring 8 is gradually rotated further, snaps into position in the positioning bores 14 which engage the individual knife holders in one of its two ring disks 8' 15 are assigned.
  • a pneumatically operated installation and removal slide 16 consisting of two parallel support rods 16 'is provided, by means of which the knife rings 8 are pushed in and out of the resharpening device.
  • the equipment table 2 carries a grinding unit 17, which consists of a grinding wheel 18, a drive motor 19 and a belt drive 20.
  • the grinding unit 17 is fastened on a support 21 which can be moved in the axial and radial direction by means of a cross slide 22, 23.
  • the axial back and forth movement during the sharpening process takes place on a lower carriage 22, which is driven by a hydraulic unit 24 controlled by limit switches.
  • a position-controlled special drive 25 is used for the targeted radial movement of the grinding unit 17 arranged on an upper slide 23 into its exact working position.
  • Bellows sleeves 26, 27 are provided to protect the slideways of the lower and upper slides 22, 23.
  • the circle 18 'shown in dash-dotted lines in FIG. 1 symbolizes the diameter of a completely worn grinding wheel 18.
  • the device table 2 carries an adjusting device 28, which consists of a pneumatically actuable knife stop 29, to which a position button 30 for detecting the state of wear of the inner wall 8 ′′ of the knife ring 8 is rigidly assigned.
  • an adjusting device 28 which consists of a pneumatically actuable knife stop 29, to which a position button 30 for detecting the state of wear of the inner wall 8 ′′ of the knife ring 8 is rigidly assigned.
  • the program-controlled A pneumatic unit 33 ensures radial movement of the knife stop.
  • a tool combination 35 which is mounted on a tool stand 34, is used to advance the individual knives 32 up to the knife stop 29 defined by the position sensor 30.
  • a screw spindle 36 for loosening and tightening the clamping screws 37 on the knife holders 15, a knife plunger 39 for individually advancing the cutting knives 32 and finally a hold-down device 40 which ensures that the loosened knife holding plates 38 are immobilized during the individual knife feeds.
  • All tools 36, 39 and 40 are pneumatically operated under program control.
  • the screw spindle 36 can be moved in the axial direction on a slide rail 41, for which purpose a pneumatic unit 42 is provided.
  • a compressed air nozzle 43 In the lower area of the tool stand 34 there is also a compressed air nozzle 43 which can also be moved back and forth in the axial direction on a slide rail 44 by means of a pneumatic unit 45 controlled by limit switches.
  • the resharpening device described works according to the invention as follows: After removal of a knife ring 8 from a cutting machine, the latter is moved into the sharpening space on a special carriage 47 and is brought into position in front of the resharpening device in the position shown in FIG. 2. Then the installation and removal slide 16 is extended so far that its support rods 16 'reach under the knife ring 8 and move it back into the centering provided in the turntable 7 pull where it is then attached, the locking bolt 13 'is already engaged in one of the positioning holes 14.
  • the centrally controlled automatic functional sequence of the sharpening process now begins: First, the screw spindle 36 is activated in such a way that it loosens the clamping screws 37 of a knife holder 15 one after the other.
  • the knife stop 29 is advanced radially by its pneumatic unit 33 until the position button 30 assigned to it abuts a point on the wear shoe 46 adjacent to the knife 32 in question.
  • the hold-down device 40 and the knife plunger 39 are now activated and the relevant knife 32 in the knife ring 8 is pushed inwards until its end face 32 ′ abuts the knife stop 29.
  • This knife position is now fixed by successively tightening the clamping screws 37 by means of the screw spindle 36.
  • the central controller then causes the knife stop 29 and the locking bolt 13 'to be withdrawn and the knife ring 8 to be rotated further by one knife division, after which the locking bolt 13' snaps into the next positioning bore 14. Now the feed of the next knife 32 begins in the manner just described, and it repeats itself until all the knives 32 of a knife ring are advanced evenly and fixed in their new position.
  • the central controller now instructs the pinion motor 10 to continuously rotate the knife ring 8 slowly. It also causes the grinding support 21 to extend radially towards the knife ring 8 is fed until the grinding wheel 18 comes into contact with the advanced knives 32.
  • the grinding wheel 18 absorbs a torque that increases the power requirement of its drive motor 19 and signals the start of the actual grinding feed as a control impulse of the central automatic program by which the program-controlled special drive 25 gradually grinds the grinding unit 17 against the end faces 32 ′ of the knives 32 during the sharpening process emotional.
  • This grinding feed which is only a few tenths of a millimeter, is preprogrammed by two parameters, on the one hand from the state of wear of the inner wall 8 ′′ of the knife ring 8 or its wear shoes 46 determined and averaged by the position switch 30 and on the other hand from the desired cutting edge of the knives 32 over this inner wall 8 ''. Since the grinding wheel 17 gradually wears out, the current diameter of the grinding wheel 17 is determined in a dressing device (not shown) after each sharpening process and is entered as a correction factor in the feed programming.
  • the program control now switches off all rotary drives and returns all equipment to their starting positions.
  • the knife ring 8 can be detached from the turntable 7 and loaded onto the special carriage 47 by means of the installation and removal slide 16 and there for a knife ring change a cutting machine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Claims (11)

  1. Procédé pour le réaffûtage des couteaux de broyeurs, en particulier de couteaux de déchiqueteurs produisant des copeaux, lesquels couteaux sont fixés de manière amovible dans des porte-couteaux cylindriques de telle sorte que lors du déchiquetage leurs tranchants forment un cercle commun et caractérisé en ce que le réaffûtage des couteaux se fait alors qu'ils sont montés dans le porte-couteau tournant lentement et en ce qu'avant le réaffûtage tous les couteaux sont dessérrés l'un aprés l'autre et avancés en direction de leur zone active sur une distance correspondant à l'usure des tranchants et fixés à nouveau dans cette position et que le déplacement radial par rapport à la surface concernée du porte-couteau requis pour l'obtention de ce dépassement souhaité des tranchants est préprogrammé en tenant compte de l'état d'usure de cette surface.
  2. Procédé selon la revendication 1, caractérisé en ce que l'état d'usure des surfaces concernées du porte-couteau nécessaire à la préprogrammation de l'avance radiale d'affûtage est détecté lors de l'avancement de chaque couteaux et qu'une valeur moyenne en est déduite.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'avant et aprés l'affûtage, les couteaux et leur fixations sont nettoyés à l'aide d'une substance sous pression.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le réaffûtage à lieu en ajoutant un agent de refroidissement.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le porte-couteau est démonté et sorti du broyeur pour le réaffûtage des tranchants des couteaux et ensuite traité dans un dispositif d'affûtage.
  6. Dispositif pour la mise en oeuvre des procédés selon la revendication 5, en particulier pour le réaffûtage de couteaux d'une couronne de couteaux, caractérisé en ce que sur un cadre de machine (1) sont montés un disque rotatif (7) pour la couronne de couteaux ainsi qu'un dispositif d'affûtage (17) à mouvement translatoire (va et vient) et un dispositif d'ajustement (28) effectuant l'avancement régulier des couteaux (32) par rapport à la paroi intérieure cylindrique (8'') de la couronne de couteaux (8) sur une distance correspondant à l 'usure des tranchants.
  7. Dispositif selon la revendication 6, caractérisé en ce que le dispositif d'affûtage (17) est constitué d'un disque d'affûtage (18) dont le support (21) peut être déplacé axialement et radialement sur un chariot à croix (22,23) et en ce que le dispositif d'ajustement pour le dépassement régulier des couteaux comprend au moins un tampon (39) agissant sur le dos des couteaux ainsi qu'une butée (29) limitant l'avancement des couteaux.
  8. Dispositif selon la revendication 7, caractérisé en ce qu'un capteur de position (30) détectant l'état d'usure de la paroi intérieure de la couronne de couteaux (8'') est attribué à la butée (29).
  9. Dispositif selon la revendication 8, caractérisé en ce que le capteur de position (30) est intégré dans un système de commande électronique qui programme l'avance radiale du dispositif d'affûtage (17) nécessaire pour l'obtention du dépassement souhaité des tranchants en fonction de l'état d'usure de la paroi intérieure de la couronne de couteaux (8'').
  10. Dispositif selon l'une des revendications 5 á 9, caractérisé en ce que le dispositif d'ajustement pour l'avancement des couteaux est constitué d'une combinaison d'outils (34) comprenant une tige filetée (36) relâchant automatiquement les fixations des couteaux (15) ainsi qu'un abaisseur (40) agissant sur les plaques de fixation des couteaux (38).
  11. Dispositif selon la revendication 10, caractérisé en ce que la succession des différentes fonctions de la combinaison d'outils (35) est commandée par un dispositif automatique de commande des séquences.
EP94103827A 1993-05-18 1994-03-12 Procédé et dispositif pour réaflûter les couteaux d'un broyeur Expired - Lifetime EP0626234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4316514A DE4316514C2 (de) 1993-05-18 1993-05-18 Verfahren und Vorrichtung zum Nachschärfen der Messer von Zerkleinerungsmaschinen
DE4316514 1993-05-18

Publications (3)

Publication Number Publication Date
EP0626234A2 EP0626234A2 (fr) 1994-11-30
EP0626234A3 EP0626234A3 (en) 1995-01-04
EP0626234B1 true EP0626234B1 (fr) 1997-05-21

Family

ID=6488315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94103827A Expired - Lifetime EP0626234B1 (fr) 1993-05-18 1994-03-12 Procédé et dispositif pour réaflûter les couteaux d'un broyeur

Country Status (5)

Country Link
US (1) US5525094A (fr)
EP (1) EP0626234B1 (fr)
CA (1) CA2123043C (fr)
DE (2) DE4316514C2 (fr)
ES (1) ES2103513T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2556920A2 (fr) 2011-08-09 2013-02-13 Siempelkamp Maschinen- und Anlagenbau GmbH & Co. KG Dispositif d'aiguisage de lames d'un lame-couronne pour un déchiqueteur à aubage
EP2556921A2 (fr) 2011-08-09 2013-02-13 Siempelkamp Maschinen- und Anlagenbau GmbH & Co. KG Procédé d'aiguisage, en particulier l'aiguisage ultérieur de lames d'un déchiqueteur à aubage
DE102011052531A1 (de) 2011-08-09 2013-02-14 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Verfahren zum Schleifen von Messern und Verschleißplatten eines Messerringzerspaners
DE202015002132U1 (de) 2015-03-20 2016-05-23 B. Maier Zerkleinerungstechnik Gmbh Vorrichtung zum Schleifen von Messern und Verschleißplatten des Messerringes eines Messerringzerspaners
DE102015003520A1 (de) 2015-03-20 2016-09-22 B. Maier Zerkleinerungstechnik Gmbh Verfahren und Vorrichtung zum Schleifen von Messern und Verschleißplatten eines Messerringes

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316514C2 (de) * 1993-05-18 1996-02-08 Pallmann Kg Maschf Verfahren und Vorrichtung zum Nachschärfen der Messer von Zerkleinerungsmaschinen
DE19518354C2 (de) * 1995-05-19 1997-02-27 Pallmann Kg Maschf Verfahren und Vorrichtung zum automatischen Auswechseln von kranzförmigen Zerkleinerungswerkzeugen an Zerkleinerungsmaschinen, insbesondere von Messerkränzen für Holzzerspanmaschinen
CN1078833C (zh) * 1995-08-31 2002-02-06 格里森工场 用于校正刀盘体的方法和装置
DE19605072C1 (de) * 1996-02-12 1997-10-02 Pallmann Kg Maschf Vorrichtung zum Nachschärfen von zweidimensional wirksamen Schneidgarnituren bei Zerspanmaschinen, insbesondere für Holz
DE19629668C1 (de) * 1996-07-23 1998-01-02 Pallmann Kg Maschf Verfahren und Vorrichtung zum Nachschärfen von Messern für Zerkleinerungsmaschinen, insbesondere von Zerspanmessern für Holz
DE19641810C1 (de) * 1996-10-10 1997-11-27 Maier Zerkleinerungstech Gmbh Verfahren und Vorrichtung zum Schleifen der Messer von Zerspanern
DE19718681A1 (de) * 1997-05-02 1998-11-05 Maier Zerkleinerungstech Gmbh Messerringzerspaner
US5941148A (en) * 1998-01-16 1999-08-24 Tidland Corporation Automatic slitter blade sharpener
DE19900566B4 (de) * 1999-01-09 2005-03-24 B. Maier Zerkleinerungstechnik Gmbh Messerring-Zerspaner zum Zerspanen von Hackschnitzeln
DE19903153C1 (de) * 1999-01-27 2000-03-16 Case Harvesting Sys Gmbh Verfahren zum Feststellen der Schärfe von Häckselmessern
DE19904345A1 (de) * 1999-02-03 2000-08-31 Maier Zerkleinerungstech Gmbh Vorrichtung zum Schleifen der Messer von Zerspanern
DE19921597C1 (de) * 1999-05-07 2000-07-27 Maier Zerkleinerungsanlage Gmb Messerring-Zerspaner zum Zerspanen von Hackschnitzeln
DE10117480A1 (de) * 2001-04-07 2003-01-16 Maier Zerkleinerungstech Gmbh Verfahren und Vorrichtung zum Schärfen der Schneidmesser eines Messerringzerspaners
US20120094582A1 (en) * 2009-05-15 2012-04-19 Michael Lytinas Blade sharpening device
CN107234497B (zh) * 2015-10-29 2019-03-19 兰如林 刃磨装置

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GB516083A (en) * 1938-07-08 1939-12-21 Molins Machine Co Ltd Improvements in or relating to the sharpening of the knives of tobacco cutting machines
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DE3403543A1 (de) * 1983-07-16 1985-01-24 Hauni-Werke Körber & Co KG, 2050 Hamburg Verfahren und vorrichtung zum schleifen eines wellenfoermigen schneidprofils zum schneiden von tabak
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US4732064A (en) * 1987-03-05 1988-03-22 Gerber Garment Technology, Inc. Apparatus and method for sharpening edges of reciprocating blade
EP0335256B1 (fr) * 1988-03-28 1992-09-02 Deere & Company Ramasseuse-hacheuse
US5094037A (en) * 1989-10-03 1992-03-10 Speedfam Company, Ltd. Edge polisher
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DE4114840C2 (de) * 1991-05-07 1995-01-19 Pallmann Kg Maschf Verfahren und Vorrichtung zum automatischen Auswechseln von nachschleifbaren Messern bei Holzzerspanmaschinen
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2556920A2 (fr) 2011-08-09 2013-02-13 Siempelkamp Maschinen- und Anlagenbau GmbH & Co. KG Dispositif d'aiguisage de lames d'un lame-couronne pour un déchiqueteur à aubage
EP2556921A2 (fr) 2011-08-09 2013-02-13 Siempelkamp Maschinen- und Anlagenbau GmbH & Co. KG Procédé d'aiguisage, en particulier l'aiguisage ultérieur de lames d'un déchiqueteur à aubage
DE102011052529A1 (de) 2011-08-09 2013-02-14 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Verfahren zum Schärfen, insbesondere Nachschärfen von Messern eines Messerringzerspaners
DE102011052531A1 (de) 2011-08-09 2013-02-14 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Verfahren zum Schleifen von Messern und Verschleißplatten eines Messerringzerspaners
DE102011052538A1 (de) 2011-08-09 2013-02-14 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Vorrichtung zum Schärfen von Messern eines Messerrings für einenMesserringzerspaner
DE102011052531B4 (de) * 2011-08-09 2017-09-07 Siempelkamp Maschinen- Und Anlagenbau Gmbh Verfahren und Vorrichtung zum Schleifen von Messern und Verschleißplatten eines Messerringzerspaners
DE202015002132U1 (de) 2015-03-20 2016-05-23 B. Maier Zerkleinerungstechnik Gmbh Vorrichtung zum Schleifen von Messern und Verschleißplatten des Messerringes eines Messerringzerspaners
DE102015003520A1 (de) 2015-03-20 2016-09-22 B. Maier Zerkleinerungstechnik Gmbh Verfahren und Vorrichtung zum Schleifen von Messern und Verschleißplatten eines Messerringes
DE102015003520B4 (de) * 2015-03-20 2016-11-24 B. Maier Zerkleinerungstechnik Gmbh Verfahren und Vorrichtung zum Schleifen von Messern und Verschleißplatten eines Messerringes

Also Published As

Publication number Publication date
EP0626234A3 (en) 1995-01-04
DE4316514C2 (de) 1996-02-08
ES2103513T3 (es) 1997-09-16
CA2123043A1 (fr) 1994-11-19
DE4316514A1 (de) 1994-11-24
DE4440941C1 (de) 1996-02-22
US5525094A (en) 1996-06-11
CA2123043C (fr) 1997-02-18
EP0626234A2 (fr) 1994-11-30

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