EP0033382A2 - Outil rotatif pour la fabrication de copeaux de bois plats - Google Patents

Outil rotatif pour la fabrication de copeaux de bois plats Download PDF

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Publication number
EP0033382A2
EP0033382A2 EP80107900A EP80107900A EP0033382A2 EP 0033382 A2 EP0033382 A2 EP 0033382A2 EP 80107900 A EP80107900 A EP 80107900A EP 80107900 A EP80107900 A EP 80107900A EP 0033382 A2 EP0033382 A2 EP 0033382A2
Authority
EP
European Patent Office
Prior art keywords
knife
bar
shaft according
knife shaft
stop
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.)
Granted
Application number
EP80107900A
Other languages
German (de)
English (en)
Other versions
EP0033382A3 (en
EP0033382B1 (fr
Inventor
Hans Sybertz
Arnold Schmidt
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.)
HOMBAK MASCHINENFABRIK GmbH U CO KG
Original Assignee
HOMBAK MASCHINENFABRIK GmbH U CO KG
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
Priority claimed from DE19808002428U external-priority patent/DE8002428U1/de
Priority claimed from DE19803018359 external-priority patent/DE3018359C2/de
Application filed by HOMBAK MASCHINENFABRIK GmbH U CO KG filed Critical HOMBAK MASCHINENFABRIK GmbH U CO KG
Priority to AT80107900T priority Critical patent/ATE10456T1/de
Publication of EP0033382A2 publication Critical patent/EP0033382A2/fr
Publication of EP0033382A3 publication Critical patent/EP0033382A3/de
Application granted granted Critical
Publication of EP0033382B1 publication Critical patent/EP0033382B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
    • B27G13/04—Securing the cutters by mechanical clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005—Tools therefor

Definitions

  • the invention relates to a knife shaft for producing flat wood chips, with peripheral recesses, in each of which a regrindable knife, a position determining its position, a knife bar connected via a positive connection to the knife shaft body, and a centrifugal wedge acting on this knife bar are arranged.
  • the invention has for its object to improve the knife shaft explained in terms of manipulation and adjustment of the knife.
  • an additional stop bar is arranged in each peripheral recess, which rests loosely on the abovementioned stop surface, and on which the knife is displaceably and securely held, the chest loosely against the knife bar designed as a knife terminal block is present.
  • the knife clamping strip thus remains in the knife shaft and thus also in its positive connection when the knife is replaced or regrind. It is therefore only necessary to manipulate the knife with its stop bar.
  • This stop bar can, however, consist of thin material which, for example, only needs to have a thickness of approximately 1.5 mm. This results in an enormous reduction in weight and a correspondingly considerably easier handling when removing or replacing the knives.
  • the unit consisting of the stop bar and knife lies loosely on the one hand against the knife terminal block and on the other hand loosely on the stop surface. To remove this unit, the centrifugal wedge only needs to be pushed in by a very small distance, since the named unit can then be pulled out without any difficulty.
  • the stop bar which extends over the length of the knife, only needs to rest on the stop surface with short contact surfaces. As a result, an exact stop and thus a correspondingly exact position of the knife can be achieved in a relatively simple manner even when dirty.
  • the knife itself can be a clear distance from the abovementioned stop surface. Since the knife terminal block is not removed from its positive connection at all, the problems resulting from possible contamination are eliminated.
  • connection between the knife and the stop bar can consist, in a manner known per se, of tensioning screws which are likewise inserted in a manner known per se through elongated holes in the stop bar. These elongated holes can run approximately perpendicular to the longitudinal axis of the stop bar or somewhat inclined to it.
  • each knife can have at least two threaded holes for optionally receiving a clamping screw. If the displacement distance between the knife and the stop bar determined by the length of the elongated holes has been used up, the knife can still be re-sharpened, since the clamping screw can then be screwed into the respective lower threaded hole.
  • the knife In the known systems, in which the cutting knife is screwed in the cutting direction in front of the knife bar acting as the knife carrier, the knife must be unscrewed from the knife carrier before the grinding process after removing the two parts from the knife shaft.
  • the knife is sharpened alone, must be screwed back together with the knife holder after sharpening and adjusted on the knife holder to determine the knife board. Unscrewing is done manually; screwing and setting in partially semi-automatic devices.
  • the stop bar viewed in the direction of rotation, is screwed on behind the knife and, due to its shape, lies below the extension of the knife surface to be ground.
  • the knife can therefore be clamped flat on a grinding machine table and reground together with the screwed-on stop bar.
  • the knife, together with the still screwed-on stop bar is placed in a semi-automatic device in which, after loosening the screw connection between knife and stop bar, both parts are displaced relative to one another in such a way that the desired knife setting is achieved between the knife-edge and the base of the stop bar .
  • the screw connection is then tightened again.
  • each knife can be supported with its back against a wear strip connected to the knife shaft body, which has insertion slots that are open or closed toward the knife shaft circumference for receiving a holding tab of the stop strip and its tensioning means.
  • the stop bar extending over the length of the knife can thus be made relatively narrow.
  • the above-mentioned elongated holes for fastening the stop bar with the knife are provided in holding tabs of the stop bar which are arranged approximately perpendicular to the said bar and which in turn can be kept correspondingly narrow.
  • the existing unit is re-installed in the knife shaft, the unit can be inserted in a simple manner by resting the knife chest on the knife terminal block, the holding tabs mentioned with the heads of them protruding Extend the tensioning screws into the insertion slots on the wear strip.
  • each retaining tab is angled over approximately the depth of the insertion slot and thus largely closes the insertion slot to the outside.
  • a further simplification of the means for clamping and adjusting the knives is achieved if the knife clamping strip on its radially outer longitudinal edge forming the chip discharge surface is overlapped by webs of the centrifugal wedge which serve to support the knife and serve to support the wood.
  • a knife shaft for producing flat wood chips which has peripheral recesses, in each of which a regrindable knife, a knife terminal block connected via a positive connection to the knife shaft body and a centrifugal wedge acting on this knife terminal block are arranged has webs serving for wood support, while the knife lies loosely with its chest against the knife terminal block, the radially outer longitudinal edge of which forms the chip discharge surface.
  • the knife is therefore only held in a force-locking manner; any means for determining the knife protrusion in the working position of the knife are not provided in the knife shaft itself.
  • the knife can be adjusted according to the method explained in DE-OS 22 44 077. All knives are clamped with a knife protrusion that is larger than the desired knife protrusion in the working position of the knife. The knives are then pressed into the knife shaft body with the aid of a special device to the desired knife protrusion.
  • the knife terminal strip is flush with its outer edge with the knife shaft surface.
  • This outer longitudinal edge of the knife terminal block has webs serving for wood support, which are aligned with corresponding webs of the centrifugal wedge and form chip discharge surfaces between them.
  • a disadvantage of this known embodiment lies in the complicated shape and the consequent complex production of the knife terminal block. Since this knife-terminal strip with its web-like projections extends into the knife shaft surface, and since such strips generally lie obliquely to the knife shaft axis, the knife terminal block must be twisted over its length in adaptation to the knife shaft surface. This leads to a complicated design of the knife terminal block, which can only be produced with complex copying machines.
  • the design of the knife terminal block according to the invention leads to an enormous amount compared to this prior art Simplification in the manufacture of the knife terminal block. Since the knife terminal block no longer protrudes into the knife shaft surface, all longitudinal edges of the system lie parallel to one another, so that the knife terminal block can be a rolled profile according to the invention. How this brings about a reduction in manufacturing costs is enormous.
  • the function of the previously provided web-like approaches on the knife terminal strip is now taken over by the centrifugal wedge, the webs of which serve to support the wood are brought right up to the knife chest.
  • the upper longitudinal edge of the knife terminal block can therefore also be designed to run smoothly.
  • Handling can be further improved if the knife terminal strip is acted upon by a spring which presses it into its open position.
  • This spring can engage in a recess of the knife terminal block and hold it in its positive connection and thus perform a double function.
  • the knife terminal block which is only relatively narrow, can be attached to the spring and carried by it.
  • the cutterblock illustrated from an M eater shaft body 1 is made with peripheral recesses 2, only one of which is shown in FIG. 1
  • a wear strip 3 which is flush with the surface of the knife shaft body 1, is fixedly connected to the knife shaft body 1.
  • a positive connection 4 for a knife terminal strip 5 is also positively connected to the knife shaft body 1 .
  • the positive connection 4 also has a stop surface 6 on which a stop strip 7 is loosely supported. The latter is screwed via tensioning screws 8 to a knife 9 which loosely rests against the knife terminal block 5 with its chest. The latter is acted upon by a centrifugal wedge 10 which presses the knife 9 with its back against the wear strip 3.
  • the clamping screws 8 are inserted through elongated holes 11 of the stop bar 7, so that the knife 9 can be displaced in an approximately radial direction relative to the stop bar 7 assigned to it and can be fixed in the desired position. In order to enlarge this displacement path and thereby enable the knife to be sharpened more frequently, there is a second, lower thread in the knife 9 for the clamping screw 8 hole 12 provided.
  • FIG. 2 shows that the stop bar 7 consists of a relatively narrow strip part 7a, which extends over the length of the knife 9 and on which holding tabs 7b, in which the elongated holes 11 are arranged, are seated.
  • FIG. 2 also shows that the strip part 7a has relatively short contact surfaces 7c with which the stop bar 7 rests on the stop surface 6.
  • the wear strip 3 has insertion slots 13 which are open toward the circumference of the knife shaft and which each serve to hold a retaining tab 7b of the stop strip 7 and the head of a clamping screw 8.
  • insertion slots 13 which are open toward the circumference of the knife shaft and which each serve to hold a retaining tab 7b of the stop strip 7 and the head of a clamping screw 8.
  • the free outer end 7d of each retaining tab 7b is angled over approximately the depth of the insertion slot 13.
  • the insertion slots 13 need not be significantly wider than the retaining tabs 7b. In principle, it would also be possible to close the insertion slots 13 towards the surface of the knife shaft. Then, to remove the knife, the centrifugal wedge would have to be pushed in a little more deeply.
  • the knife shaft shown in FIGS. 3 and 4 consists of a knife shaft body 1 with peripheral recesses 2, only one of which is shown in the figures.
  • a wear strip 3 which is flush with the surface of the knife shaft body 1, is fixedly connected to the knife shaft body 1.
  • the positive connection 4 also has a stop surface 6 on which a stop strip 7 is loosely supported. The latter is via tensioning screws 8, not shown, with a knife 9 screwed, which rests loosely with its breast 9a against the knife terminal block 5. The latter is acted upon by a centrifugal wedge 10 which presses the knife 9 against the wear strip 3 with its back.
  • the clamping screws, not shown, for the knife 9 can be inserted through elongated holes in the stop bar 7, so that the knife 9 can be moved relative to the stop bar 7 in an approximately radial direction and can be fixed in the desired position. To increase this displacement. and thereby enable a more frequent regrinding of the knife, several thread holes lying one below the other can be provided in the knife 9 for the clamping screws mentioned.
  • the wear strip 3 has an insertion slot 13 which serves to receive the stop strip 7 and its clamping means.
  • the knife terminal block 5 consists of a simple rolled profile.
  • the radially outer longitudinal edge of the knife clamping strip forms an uninterrupted chip discharge surface 5a over the length of the knife clamping strip.
  • the latter is overlapped by webs 10a of the centrifugal wedge 10 which serve to support the wood and which are brought up to the knife breast 9a.
  • the centrifugal wedge 10 rests against the knife terminal strip 5 only with a narrow pressure nose 10b, the contact surface 5b of which extends at an acute angle to the knife chest 9a.
  • Figure 3 shows that the webs 10a of the centrifugal wedge or parts thereof are designed as replaceable wear parts.
  • the knife terminal strip 5 is acted upon by a spring 14 which presses it into its open position. This engages in a recess 5c of the knife terminal strip 5 and holds it in its positive connection 4.
  • the spring 14 thus has a double function.
  • the recess 5c in the knife terminal block 5 is designed as a downwardly open insertion slot, and the knife terminal block 5 with a rounded nose engages in a corresponding recess After inserting the spring 14, the knife terminal strip 5 with its recess 5c is pushed onto the spring from above and pressed down until it snaps into the positive engagement with its nose.
  • the knife clamping strip 5 is designed to be considerably narrower than in the exemplary embodiment according to FIG. 3.
  • This narrow knife clamping strip 5 practically only comprises the chip discharge surface 5a and the contact surface 5b for the pressure lug 10b of the centrifugal wedge 10.
  • the narrow longitudinal edge is at the lower longitudinal edge Knife terminal block 5 attached to a raised spring 14, which in turn is fixed with its lower angled end on the knife shaft body 1.
  • a plurality of springs 14 can be provided spaced apart.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Knives (AREA)
  • Prostheses (AREA)
EP19800107900 1980-01-31 1980-12-15 Outil rotatif pour la fabrication de copeaux de bois plats Expired EP0033382B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107900T ATE10456T1 (de) 1980-01-31 1980-12-15 Messerwelle zur erzeugung flaechiger holzspaene.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8002428U 1980-01-31
DE19808002428U DE8002428U1 (de) 1980-01-31 1980-01-31 Messerwelle zur erzeugung flaechiger holzspaene
DE3018359 1980-05-14
DE19803018359 DE3018359C2 (de) 1980-05-14 1980-05-14 Messerwelle zur Erzeugung flächiger Holzspäne

Publications (3)

Publication Number Publication Date
EP0033382A2 true EP0033382A2 (fr) 1981-08-12
EP0033382A3 EP0033382A3 (en) 1982-08-11
EP0033382B1 EP0033382B1 (fr) 1984-11-28

Family

ID=25785445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800107900 Expired EP0033382B1 (fr) 1980-01-31 1980-12-15 Outil rotatif pour la fabrication de copeaux de bois plats

Country Status (2)

Country Link
EP (1) EP0033382B1 (fr)
CA (1) CA1150940A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265622A3 (en) * 1986-10-28 1989-11-23 Babcock-Bsh Aktiengesellschaft Vormals Buttner-Schilde-Haas Ag Cutter block
AU674113B2 (en) * 1993-12-30 1996-12-05 Matthew D'ornan Keith Dean Blade structure for comminuting apparatus
US5660218A (en) * 1993-07-08 1997-08-26 Sunds Defibrator Woodhandling Oy Blade system to be used in wood chipping, a blade; a guide member and a filler member as well as a method for changing blades
AT2192U1 (de) * 1997-07-22 1998-06-25 Aigner Werkzeuge Ges M B H Messerkopf für eine fräsvorrichtung
EP0879680A3 (fr) * 1997-04-22 1999-11-03 Heinrich Prof. Dr. Ing. Feichtinger Dispositif de fixation des couteaux dans un rotor de coupe
AT406132B (de) * 1998-05-28 2000-02-25 Boehler Miller Messer Und Saeg Anordnung eines einweg-kamm-messers in einer messerwalze

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202023104286U1 (de) * 2023-07-28 2023-10-16 Blank Service Gmbh Schneideinrichtung zur Verwendung in einem Messerring einer Messerringholzzerspanungsvorrichtung, Messerring sowie Messerringholzzerspanungsvorrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE70083C (de) * Firma W. RITTER in Altona, Friedenstrafse 17 Messerklappe für Messer an Holzraspeltrommeln
DE915265C (de) * 1951-09-29 1954-07-19 Paul Kirsten Dr Ing Messerwelle fuer Holzbearbeitungsmaschinen mit keilartig wirkenden Druckleisten
DE1195934B (de) * 1957-10-30 1965-07-01 Paul Kirsten Dr Ing Messerwelle fuer Holzbearbeitungsmaschinen, insbesondere Zerspanungsmaschinen mit keil-artigen Druckleisten
US3600816A (en) * 1968-04-05 1971-08-24 Towa Electric Rotary cutter blade-adjusting apparatus
DE7522319U (de) * 1975-07-14 1976-08-26 Hombak Maschinenfabrik Kg, 6550 Bad Kreuznach Messerwelle fuer holzzerspanungsmaschinen
DE2608056C3 (de) * 1976-02-27 1979-05-03 Hombak Maschinenfabrik Kg, 6550 Bad Kreuznach Holzzerspanungsmaschine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265622A3 (en) * 1986-10-28 1989-11-23 Babcock-Bsh Aktiengesellschaft Vormals Buttner-Schilde-Haas Ag Cutter block
US5660218A (en) * 1993-07-08 1997-08-26 Sunds Defibrator Woodhandling Oy Blade system to be used in wood chipping, a blade; a guide member and a filler member as well as a method for changing blades
EP0707529B1 (fr) * 1993-07-08 1998-05-13 Sunds Defibrator Woodhandling Oy Systeme de lame s'utilisant dans le hachage du bois en copeaux, lame, element de guidage, element de remplissage et procede d'echange de lames
AU674113B2 (en) * 1993-12-30 1996-12-05 Matthew D'ornan Keith Dean Blade structure for comminuting apparatus
EP0879680A3 (fr) * 1997-04-22 1999-11-03 Heinrich Prof. Dr. Ing. Feichtinger Dispositif de fixation des couteaux dans un rotor de coupe
AT2192U1 (de) * 1997-07-22 1998-06-25 Aigner Werkzeuge Ges M B H Messerkopf für eine fräsvorrichtung
AT406132B (de) * 1998-05-28 2000-02-25 Boehler Miller Messer Und Saeg Anordnung eines einweg-kamm-messers in einer messerwalze

Also Published As

Publication number Publication date
EP0033382A3 (en) 1982-08-11
EP0033382B1 (fr) 1984-11-28
CA1150940A (fr) 1983-08-02

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