EP1025956B1 - Device for dressing the knives of a crusher - Google Patents

Device for dressing the knives of a crusher Download PDF

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Publication number
EP1025956B1
EP1025956B1 EP00100061A EP00100061A EP1025956B1 EP 1025956 B1 EP1025956 B1 EP 1025956B1 EP 00100061 A EP00100061 A EP 00100061A EP 00100061 A EP00100061 A EP 00100061A EP 1025956 B1 EP1025956 B1 EP 1025956B1
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EP
European Patent Office
Prior art keywords
medium
pot
grinding
channel
outlet
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
EP00100061A
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German (de)
French (fr)
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EP1025956A1 (en
Inventor
Robert Loth
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.)
B Maier Zerkleinerungstechnik GmbH
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B Maier Zerkleinerungstechnik GmbH
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    • 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
    • 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
    • B24B3/52—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of shear blades or scissors
    • 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
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
    • B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with cooling provisions

Definitions

  • the invention relates to a device for grinding the knife of chippers according to the preamble of claim 1.
  • Such Device is known from US 4,791,760 A.
  • a big problem with such chipper is the relatively small one Service life of the knives. Due to the wear the knives already have be exchanged after a few hours of operation, i. multiple times per working shift. Installing new, sharp blades requires one special effort. The desired chip thickness results namely from the distance of the knife against the so-called wear plates, the in turn are part of the knife wreath. It follows that the Swap blunt knives against sharp knives very timely and is expensive. In particular, the personnel costs are high for this.
  • the invention has for its object to provide a device for grinding the To make knife of Zerspanem so that the grinding process more efficient can be carried out.
  • the inventor has recognized that the inventive design of the Grinding device the medium for cooling and lubrication with high Speed is introduced to the work site of the grinding device. Due to the centrifugal force of the grinding device is not only the Flow rate of the medium increases, but also the Jet pressure of the medium, so that this really all surface elements of the detected to be ground knife. In this way, the grinding process can be perform faster and more efficiently.
  • the grinding device according to the invention is also suitable to sharpen so-called clearance angle.
  • Fig. 1 shows an apparatus for grinding blades of a Zerspaners. The chipper itself is not shown here.
  • the grinding station 1 is movable on rollers 1.2 relative to the chipper, in this way that a knife basket received at the chipper and from this can be transported away to the working position of the grinding station 1.
  • Im illustrated embodiment is a knife basket 2 in the grinding station. 1 used. He rests on rollers 1.3 so that he in the grinding station 1 to his own axis can be clocked.
  • the knife basket 2 has a plurality of knife packages 3, the best can be seen from Figure 4. One sees there each a support block 3.1, a Clamp 3.2, a between these two located knife 3.3, a Clamping screw 3.4 and a wear plate 3.5.
  • the crucial element of the entire device is one Grinding device 4. This can be seen in FIG. 1, but even more precisely Fig. 2.
  • the grinding device 4 is substantially pot-shaped.
  • the grinding device 4 has a Adapter 4.1, a grinding wheel 4.2 and an attached slip ring 4.3.
  • the slip ring 4.3 is applied to a knife 2.1, the blade ground becomes.
  • the adapter 4.1 is a line 5.1 for bringing a cooling and Assigned to lubricating medium.
  • medium from a radial internal point radially outward on the cutting edge of the blade 2.1 directed.
  • a plurality of blades 5.4 are provided. These serve to increase the pressure.
  • the blades 5.4 can in the manner of Be designed pump blades.
  • the cooling and lubricating medium thus takes the following route: it passes through the line 5.1 first in the channel section 5.2. In the transition from the line 5.1 to channel section 5.2 is due to the centrifugal force a Acceleration instead, and thus an increase in pressure.
  • the medium is then substantially in directed parallel to the axis and thrown against the grinding wheel, supported by the blades 5.4
  • the device according to the invention not only for Grinding knives of a chipper, but also wear plates of a chipper, can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Crushing And Grinding (AREA)

Abstract

The grinding device is pot-shaped. It has a grinding ring (4.3) in the region of the pot edge. It has at least one channel (5.1, 5.2, 5.3) to supply cutting fluid. This channel has an inlet and an outlet. The outlet is radially inside the grinding ring. The outlet is in the region of the grinding ring, so delivers cutting fluid directly to the blade.

Description

Die Erfindung betrifft eine Vorrichtung zum Schleifen der Messer von Zerspanern gemäβ dem Oberbegriff des Anspruchs 1. Eine solche vorrichtung ist aus US 4 791 760 A bekannt.The invention relates to a device for grinding the knife of chippers according to the preamble of claim 1. Such Device is known from US 4,791,760 A.

Ein großes Problem bei solchen Zerspanern besteht in der relativ geringen Standzeit der Messer. Aufgrund des Verschleißes müssen die Messer bereits nach wenigen Stunden Betriebsdauer ausgetauscht werden, d.h. mehrmals pro Arbeitsschicht. Das Einbauen neuer, scharfer Messer erfordert einen besonderen Aufwand. Die angestrebte Spandicke ergibt sich nämlich aus dem Abstand des Messers gegenüber den sogenannten Verschleißplatten, die ihrerseits Bestandteil des Messerkranzes sind. Daraus folgt, daß das Austauschen stumpfer Messer gegen scharfe Messer sehr zeit- und kostenaufwendig ist. Insbesondere sind die Personalkosten hierfür hoch.A big problem with such chipper is the relatively small one Service life of the knives. Due to the wear the knives already have be exchanged after a few hours of operation, i. multiple times per working shift. Installing new, sharp blades requires one special effort. The desired chip thickness results namely from the distance of the knife against the so-called wear plates, the in turn are part of the knife wreath. It follows that the Swap blunt knives against sharp knives very timely and is expensive. In particular, the personnel costs are high for this.

Es ist bekannt, Schleifmessern beim Schleifprozeß ein Kühl- und Schmiermittel zuzuführen, um das Schleifen effizienter zu machen. Der Schleifprozeß kann wegen der anfallenden Wärmemenge nur relativ langsam durchgeführt werden. Die bisher bekannten Vorrichtungen haben zwar ihren Zweck erfüllt, erscheinen jedoch immer noch verbesserungsfähig.It is known grinding knives in the grinding process a cooling and Supply lubricant to make the grinding more efficient. Of the Sanding process can only be relatively slow because of the amount of heat be performed. Although the previously known devices have their Purpose fulfilled, but still appear to be able to be improved.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Schleifen der Messer von Zerspanem derart zu gestalten, daß der Schleifprozeß effizienter durchgeführt werden kann.The invention has for its object to provide a device for grinding the To make knife of Zerspanem so that the grinding process more efficient can be carried out.

Diese Aufgabe wird durch die Merkmale von Anspruch 1 gelöst.This object is solved by the features of claim 1.

Der Erfinder hat erkannt, daß durch die erfindungsgemäße Gestaltung der Schleifvorrichtung das Medium zum Kühlen und zum Schmieren mit hoher Geschwindigkeit an die Arbeitsstelle der Schleifvorrichtung herangeführt wird. Durch die Zentrifugalkraft der Schleifvorrichtung wird nicht nur die Strömungsgeschwindigkeit des Mediums erhöht, sondern auch der Strahldruck des Mediums, so daß dies auch wirklich alle Flächenelemente des zu schleifenden Messers erfaßt. Auf diese Weise läßt sich der Schleifprozeß rascher und effizienter durchführen. Die erfindungsgemäße Schleifvorrichtung ist auch geeignet, sogenannte Freiwinkel anzuschleifen.The inventor has recognized that the inventive design of the Grinding device the medium for cooling and lubrication with high Speed is introduced to the work site of the grinding device. Due to the centrifugal force of the grinding device is not only the Flow rate of the medium increases, but also the Jet pressure of the medium, so that this really all surface elements of the detected to be ground knife. In this way, the grinding process can be perform faster and more efficiently. The grinding device according to the invention is also suitable to sharpen so-called clearance angle.

Wesentlich ist in jedem Falle, dass das Kühl- und Schmiermedium unmittelbar und ganz konzentriert auf die Schneiden der Messer geleitet wird, im Gegensatz zu einem flächigen Auftrag, so wie dies beispielsweise bei US 5 674 116 der Fall ist. Dort wird ein Kühlmittel durch eine zentrale Hohlwelle hindurchgeführt und über Radialkanäle in der Schleifscheibe nach außen geleitet. Gemäß dem Anspruch 1 hingegen ist der Einlaß des Zufuhrkanales des Mediums jedenfalls radial außerhalb des Zentrums der Vorrichtung angeordnet. Dies hat den Vorteil, daß die Schleifrückstände nach ihrem Abtragen nur einen kurzen Weg zurücklegen müssen und somit schnell hinweggespült werden.It is essential in any case that the cooling and lubricating medium immediately and quite focused on the cutting of the knives, in the Contrary to a flat order, as for example in US 5,674,116 is the case. There is a coolant through a central Passed hollow shaft and via radial channels in the grinding wheel to directed outside. According to to claim 1 whereas the inlet of the Supply channel of the medium in any case radially outside the center of the Device arranged. This has the advantage that the grinding residues after their removal only a short way must go and therefore fast be washed away.

Die Erfindung ist anhand der Zeichnung näher erläutert.The invention is explained in more detail with reference to the drawing.

Fig. 1 zeigt eine Vorrichtung zum Schleifen von Messern eines Zerspaners. Der Zerspaner selbst ist hier nicht dargestellt.Fig. 1 shows an apparatus for grinding blades of a Zerspaners. The chipper itself is not shown here.

Die Schleifstation 1 ist auf Rollen 1.2 relativ zum Zerspaner verfahrbar, derart, daß ein Messerkorb am Zerspaner in Empfang genommen und von diesem hinwegtransportiert werden kann, zur Arbeitsposition der Schleifstation 1. Im dargestellten Ausführungsbeispiel ist ein Messerkorb 2 in die Schleifstation 1 eingesetzt. Er ruht auf Rollen 1.3, so daß er in der Schleifstation 1 um seine eigene Achse getaktet werden kann. The grinding station 1 is movable on rollers 1.2 relative to the chipper, in this way that a knife basket received at the chipper and from this can be transported away to the working position of the grinding station 1. Im illustrated embodiment is a knife basket 2 in the grinding station. 1 used. He rests on rollers 1.3 so that he in the grinding station 1 to his own axis can be clocked.

Der Messerkorb 2 weist eine Vielzahl von Messerpaketen 3 auf, die am besten aus Figur 4 erkennbar sind. Man sieht dort jeweils einen Tragklotz 3.1, eine Klemmplatte 3.2, ein zwischen diesen beiden befindliches Messer 3.3, eine Spannschraube 3.4 sowie eine Verschleißplatte 3.5.The knife basket 2 has a plurality of knife packages 3, the best can be seen from Figure 4. One sees there each a support block 3.1, a Clamp 3.2, a between these two located knife 3.3, a Clamping screw 3.4 and a wear plate 3.5.

Das entscheidende Element der gesamten Vorrichtung ist eine Schleifeinrichtung 4. Diese ist aus Figur 1 erkennbar, aber noch genauer aus Fig. 2.The crucial element of the entire device is one Grinding device 4. This can be seen in FIG. 1, but even more precisely Fig. 2.

Die Schleifeinrichtung 4 ist im wesentlichen topfförmig.The grinding device 4 is substantially pot-shaped.

Wie man aus Fig. 2 und Fig. 3 erkennt, weist die Schleifeinrichtung 4 einen Adapter 4.1, eine Schleifscheibe 4.2 und einen daran angesetzten Schleifring 4.3 auf.As can be seen from FIGS. 2 and 3, the grinding device 4 has a Adapter 4.1, a grinding wheel 4.2 and an attached slip ring 4.3.

Der Schleifring 4.3 liegt an einem Messer 2.1 an, dessen Schneide geschliffen wird.The slip ring 4.3 is applied to a knife 2.1, the blade ground becomes.

Dem Adapter 4.1 ist eine Leitung 5.1 zum Heranführen eines Kühl- und Schmiermediums zugeordnet. Man erkennt einen Kanal, der aus den Kanalabschnitten 5.2 im Adapter 4.1 und 5.3 in der Schleifscheibe 4.2 zusammengesetzt ist. Hierdurch wird Medium von einem radial innenliegenden Punkt radial nach außen auf die Schneide des Messers 2.1 geleitet.The adapter 4.1 is a line 5.1 for bringing a cooling and Assigned to lubricating medium. One recognizes a channel, which from the Channel sections 5.2 in the adapter 4.1 and 5.3 in the grinding wheel 4.2 is composed. As a result, medium from a radial internal point radially outward on the cutting edge of the blade 2.1 directed.

Zur Erhöhung des Druckes sind mehrere Schaufeln 5.4 vorgesehen. Diese dienen der Druckerhöhung. Die Schaufeln 5.4 können nach Art von Pumpenschaufeln gestaltet sein.To increase the pressure a plurality of blades 5.4 are provided. These serve to increase the pressure. The blades 5.4 can in the manner of Be designed pump blades.

Das Kühl- und Schmiermedium nimmt somit den folgenden Weg: es gelangt durch die Leitung 5.1 zunächst in den Kanalabschnitt 5.2. Beim Übergang von der Leitung 5.1 zu Kanalabschnitt 5.2 findet aufgrund der Zentrifugalkraft eine Beschleunigung statt, und damit eine Druckerhöhung.The cooling and lubricating medium thus takes the following route: it passes through the line 5.1 first in the channel section 5.2. In the transition from the line 5.1 to channel section 5.2 is due to the centrifugal force a Acceleration instead, and thus an increase in pressure.

Im Kanalabschnitt 5.3 wird das Medium sodann im wesentlichen in achsparalleler Richtung geleitet und gegen die Schleifscheibe geschleudert, unterstützt durch die Schaufeln 5.4In the channel section 5.3, the medium is then substantially in directed parallel to the axis and thrown against the grinding wheel, supported by the blades 5.4

Die Unterteilung der Vorrichtung in die in den Figuren 2 und 3 dargestellten Teile ist aus einem anderen Grunde besonders vorteilhaft. Dadurch, daß der "Topf" aus dem Adapter 4.1 und der Schleifscheibe 4.2 zusammengebaut ist, wird die Handhabung sehr flexibel. Die Schleifscheibe 4.2 kann nämlich leicht ausgetauscht werden, beispielsweise bei Verschleiss des Schleifringes 4.3 oder wenn sich die Betriebsbedingungen aufgrund irgendwelcher Umstände ändern. Das Zusammenmontieren von Adapter 4.1 und Schleifscheibe 4.2 geht höchst einfach vor sich, beispielsweise mittels vier Schrauben. Irgendwelche Winkeleinstellungen der gesamten Einheit zwecks Erzielens eines bestimmten Freiwinkels bleiben vom Austausch der Schleifscheibe 4.2 unberührt.The subdivision of the device in that shown in Figures 2 and 3 Parts are particularly advantageous for another reason. The fact that the "Pot" is assembled from the adapter 4.1 and the grinding wheel 4.2, the handling becomes very flexible. The grinding wheel 4.2 can namely easily be replaced, for example, when wearing the slip ring 4.3 or if the operating conditions due to any circumstances to change. Assembling adapter 4.1 and grinding wheel 4.2 is very simple, for example by means of four screws. Any angle adjustments of the entire unit to achieve a certain clearance angle remain from the replacement of the grinding wheel 4.2 unaffected.

Es versteht sich, daß sich die erfindungsgemäße Vorrichtung nicht nur zum Schleifen von Messern eines Zerspaners, sondern auch von Verschleißplattern eines Zerspaners, einsetzen läßt.It is understood that the device according to the invention not only for Grinding knives of a chipper, but also wear plates of a chipper, can be used.

Claims (5)

  1. A chipper blade/chipper wearing plate sharpening device for sharpening the blades (2.1) or the wearing plates of a chipping machine, the device is essentially pot-shaped, the device comprises a grinding ring (4.3) in the region of the pot edge, the device comprises at least one channel (5.1, 5.2, 5.3) for supplying a cooling and lubricating medium, the channel (5.1, 5.2, 3) has an inlet for admitting the medium and an outlet for the medium, characterised in that the outlet for the medium is aligned directly against the cutting edge of the blade (2.1) in order to direct the medium onto the cutting edges in a concentrated manner.
  2. Device according to claim 1, characterised in that inlet of the channel (5.1, 5.2, 5.3) is located outside the centre of the pot.
  3. Device according to claim 1 or 2, characterised in that the inlet for the medium is positioned at a smaller radius than the outlet.
  4. Device according to one of claims 1 to 3, characterised in that between the inlet and outlet of the channel (5.1, 5.2, 5.3) scoop-like elements (5.3) are provided for increasing the flow rate of the medium.
  5. Device according to one of claims 1 to 4, characterised in that the pot is formed from an extension piece (4.1) which forms the pot base and a part of the peripheral wall and a grinding disc (4.2) which forms the remaining part of the peripheral wall and supports a grinding ring (4.3).
EP00100061A 1999-02-03 2000-01-05 Device for dressing the knives of a crusher Expired - Lifetime EP1025956B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904345A DE19904345A1 (en) 1999-02-03 1999-02-03 Device for sharpening cutters' knives
DE19904345 1999-02-03

Publications (2)

Publication Number Publication Date
EP1025956A1 EP1025956A1 (en) 2000-08-09
EP1025956B1 true EP1025956B1 (en) 2005-03-30

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EP00100061A Expired - Lifetime EP1025956B1 (en) 1999-02-03 2000-01-05 Device for dressing the knives of a crusher

Country Status (7)

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EP (1) EP1025956B1 (en)
JP (1) JP2000254841A (en)
KR (1) KR20000057930A (en)
AT (1) ATE291990T1 (en)
BR (1) BR0000248A (en)
DE (2) DE19904345A1 (en)
PL (1) PL338209A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011052531B4 (en) * 2011-08-09 2017-09-07 Siempelkamp Maschinen- Und Anlagenbau Gmbh Method and device for grinding knives and wear plates of a knife ring chipper
CN108527066A (en) * 2018-04-16 2018-09-14 佛山市捷亚塑料五金制品有限公司 A kind of hardware making efficient sanding and polishing device of hardware kitchen tools

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1652889C3 (en) * 1967-09-02 1974-01-10 Bayerische Maschinenfabrik F.J. Schlageter, 8400 Regensburg Segment face grinding wheel
DE2651879C2 (en) * 1976-11-13 1978-10-26 Hans 4980 Buende Sielemann Device for supplying coolant to the inside of a cup-shaped face grinding wheel
US4791760A (en) * 1987-07-09 1988-12-20 Corning Glass Works Grinding wheel coolant distributor
US5259148A (en) * 1991-11-12 1993-11-09 Wiand Ronald C Ring generator wheel with improved coolant flow
DE4316514C2 (en) * 1993-05-18 1996-02-08 Pallmann Kg Maschf Method and device for resharpening the knives of comminution machines
US5674116A (en) * 1996-10-09 1997-10-07 Cmi International Inc. Disc with coolant passages for an abrasive machining assembly
DE19718681A1 (en) * 1997-05-02 1998-11-05 Maier Zerkleinerungstech Gmbh Knife ring chipper

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Publication number Publication date
ATE291990T1 (en) 2005-04-15
EP1025956A1 (en) 2000-08-09
BR0000248A (en) 2000-09-05
PL338209A1 (en) 2000-08-14
DE19904345A1 (en) 2000-08-31
DE50009889D1 (en) 2005-05-04
KR20000057930A (en) 2000-09-25
JP2000254841A (en) 2000-09-19

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