EP0085040A2 - Broche d'outil pour la fabrication de capeaux plat en bois - Google Patents

Broche d'outil pour la fabrication de capeaux plat en bois Download PDF

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Publication number
EP0085040A2
EP0085040A2 EP83890008A EP83890008A EP0085040A2 EP 0085040 A2 EP0085040 A2 EP 0085040A2 EP 83890008 A EP83890008 A EP 83890008A EP 83890008 A EP83890008 A EP 83890008A EP 0085040 A2 EP0085040 A2 EP 0085040A2
Authority
EP
European Patent Office
Prior art keywords
knife
knives
cutting
full
recesses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83890008A
Other languages
German (de)
English (en)
Other versions
EP0085040A3 (fr
Inventor
Gustav Marchard
Peter Schürer
Friedrich Berger
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.)
Vereinigte Edelstahlwerke AG
Original Assignee
Vereinigte Edelstahlwerke AG
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 Vereinigte Edelstahlwerke AG filed Critical Vereinigte Edelstahlwerke AG
Publication of EP0085040A2 publication Critical patent/EP0085040A2/fr
Publication of EP0085040A3 publication Critical patent/EP0085040A3/fr
Withdrawn legal-status Critical Current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
    • 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 present invention relates to a knife shaft for producing flat wood chips with a predetermined length and thickness.
  • Knife shafts of this type are known in various embodiments and are in use.
  • Knits usually have an essentially rotationally symmetrical knife shaft body, in the peripheral recesses of which, parallel or obliquely to the axis, elongated knives, the cutting edges of which, in the desired chip thickness, protrude correspondingly beyond the surface of the knife shaft body and can have various designs, by means of knife holders (s) and Centrifugal wedge (s) are held in place.
  • Various types of knives are known for producing chips with a predetermined length.
  • double-comb knives are used in which the cutting edge is subdivided into individual cutting edges which protrude the surface of the knife shaft body in alternately higher and less high overhang.
  • the chip length is limited by breaking the chips on the cutting edge flanks arranged between the individual cutting edges.
  • Such double-comb knives are complex to manufacture and regrinding also requires precision and relatively complex equipment.
  • a relatively simple type of knife for the production of chips of a predetermined length has a substantially continuous cutting edge, in which, at the points where the limitation of the cutting length is desired, cutting edge projections are incorporated, e.g. B. by a deformation of the cutting edge or by a Punched at these points. Such projections can optionally also be soldered or welded to the knife. It should be mentioned at this point that in the case of high-alloy steels it is difficult to incorporate chip-limiting edges or protrusions.
  • a variant of such knives is known, which is formed by a conventional full-cutting knife with a continuous cutting edge, grooves or recesses being provided in the breast of this knife, into which the further knives are inserted.
  • these additional knives sitting in the recesses can be held in position together with the full-cutting knife.
  • DE-OS 2 952 710 has a regrindable knife for a wood-cutting machine that cuts almost the entire length of the cutting edge and on the chip run-off surface from the knife base, densely arranged scratches for the transverse division of the chip material lie in a plane with the free surface of the knife, in which each scorer is inserted as an independent scoring element in a retaining groove which extends over at least part of the basic knife body, and is fastened therein.
  • the cutters described there can be soldered, welded, for example, into the recesses of the knife breast, be glued or pinched. Since the production of the recesses in the full-cutting knife is complex, the use of these knives as disposable knives is also out of the question.
  • Disposable knives are becoming increasingly popular. They remain in use until they are fully worn and are then replaced by new disposable knives. In the case of such knives, which understandably have to be able to be produced as inexpensively as possible, the hitherto usual regrinding and adjustment of the ground knife into the position (s) corresponding to the desired chip strength can be omitted.
  • a problem is the fact that the other knives, ie z. B. scribing knives or chip length limiting knives, have significantly shorter service lives than the actual chip-cutting knives, since they are exposed to a much higher load.
  • the present invention has set itself the task of solving the problems described and to create a knife shaft, in which the difference in wear between the other knives and the actual chip-cutting knives can be taken into account, the complex production of recesses in the chest of the chip-cutting knife for receiving the additional knives can be avoided and both the chip-cutting knife and the other knives can be designed as disposable knives.
  • the invention relates to a knife shaft, in particular an oblique cut knife shaft, for manufacture of flat wood chips with a predetermined length and thickness, with peripheral recesses for receiving full-blade knives, knife holders, centrifugal wedges, possibly a wear strip and the like, the effective cutting edge of the full-blade knife being held on a flight circle and the full-blade knife one
  • a plurality of further knives is assigned to limit the chip length, which is characterized in that the further knives are designed as disposable knives and are arranged in recesses in the knife holder and are held in their position by the full-cutting knives also designed as disposable knives.
  • An embodiment of the knife shaft according to the invention is preferred in which the effective cutting edge of the full-cutting knife and the effective cutting edges of the further knives are designed to lie on, preferably two, different flight circles.
  • the cutting edges of the additional knives inserted into the recesses of the knife holder have a widening or decreasing distance from one side of the knife holder to the cutting circle of the cutting edge of the full-cutting knife, this can result in a uniformly deep scoring of the wood to be cut or a uniform one Cutting the chips can be achieved, whereby an undesirable and uncontrolled fine fraction can be avoided.
  • the recesses for the other knives in the knife holder have an increasing or decreasing distance from one side of the knife holder to the flight circle of the full-cutting knife, additional knives of identical shape can be used for each of the recesses in the knife holder, although an over the entire width of evenly deep scribing of the wood to be shredded can be reached.
  • the radius of the flight circle of the further knives is greater than the flight circle radius of the cutting edge of the full-cutting knife, then depending on the board of the further knives in the following recesses of the knife shaft, only full-cutting knives can be arranged since a pre-cutting for the chip length has already been carried out.
  • a full-cutting knife with additional knives can be followed by at least one or two full-cutting knives without an additional knife. This results in less work when replacing the other knives, and there is also the possibility that knife holders without recesses can be used for the other knives.
  • the other knives have a holding part, they can be seated in the knife holder not only by clamping action but also by mechanical anchoring.
  • a particularly simple embodiment of the further knives is that the holding part has the shape of at least one projection and / or at least one recess in at least one of the side flanks of the body of the further knives.
  • the groove machined into the wood to limit the chip length can have parallel walls, which again has a favorable influence on the fine fraction.
  • the holding parts can be designed to be biaxially or centrically symmetrical. If the cutting edges of the other knives are aligned essentially parallel to the cutting edge of the full-cutting knife, then the additional knives can be manufactured in a particularly simple manner, since it is only necessary to produce them from a corresponding steel strip by cutting to length, furthermore by the length of the cutting edge the further knife can prevent the dusty fine fraction in the chips.
  • the chips can be run off particularly freely, which ensures particularly high functional reliability.
  • FIG. 1 shows how in the peripheral recess 10 of the body 2 of the knife shaft 1 the full-cutting knife 3, designed as a one-way turning knife, is pressed against the wear strip 5 by means of knife holder 7 and centrifugal wedge 6.
  • the full-cutting knife 3 itself holds one of the further knives 4 arranged in recesses in the knife holder 7, which can be, for example, a scraper, a chip-limiting knife or a knife with another function, in these recesses in the knife holder on the side facing the full-cutting knife 3 Location.
  • the effective cutting edges of the other knives lie on a flight circle whose radius R1 is larger than that R 2 of the flight circle of the full-cutting knife.
  • an intermediate layer element 11 can be arranged between the full-cutting knife 3 and another knife 4.
  • the arrow shows the direction of rotation of the knife shaft 1. With 8 the holding piece for the knife holder 7, 13 with the wooden support elements.
  • FIGS. 2 and 3 show an embodiment of one of the further knives 4 with a holding part 20 projecting on both sides in the manner of a cross-beam and cutting edges 22 delimited on both sides with oblique flanks 21 from the front and from the side.
  • This further knife is designed as a biaxially symmetrical reversible knife.
  • the recesses in the knife holder for receiving these knives have a corresponding cross-like shape.
  • FIG. 4 shows a further knife 4, likewise designed as a reversible knife, with a cross-beam-like holding part 20, which, however, has cutters 22 limited by flanks 21 which are inclined at an uneven angle to the cutting edge.
  • FIG. 5 shows a holding part 20 projecting approximately on both sides with a T-bar shape
  • FIG. 6 shows a further knife 4 equipped with a holding part 20 projecting approximately semicircularly on both sides, each with a symmetrically flanked cutting edge 22.
  • the further knife 4 according to FIG. 9, which is equipped with a full cutting edge over the entire width, has a holding part 20 formed by a circular opening in the center of its body.
  • This opening can also have any other, at least centrically symmetrical shape and cooperate with a corresponding bolt in the recess in the knife holder.
  • the knife holder 7 shown in FIG. 10 for an oblique-cut knife shaft has recesses 12 on its surface facing the full-knife, the shape of which corresponds to the shape of the further knives described.
  • additional knives as shown in FIGS. 2 to 4, are used.
  • the knife holder 7 applies protrusion rising from right to left over the top of the knife holder 7
  • Pointing, nose-like wooden support elements 13, the upper limit of which corresponds to the contour of the knife shaft body, and the recesses 12 for receiving the further knives are worked into the knife holder 7 at the points where these support elements 13 are arranged. 10 that the cross-like recesses 12 for the further knives are arranged to rise from right to left against the top of the knife holder 7 by approximately 1 mm, so that the same knives lie on a flight circle.
  • FIG. 11 and 12 show details of the knife holder 7 shown in FIG. 10 on the basis of the sectional views along the sectional planes XI-XI and XII-XII.
  • the knife shaft shown only partially in Fig. 1 has a plurality, z. B. 12, peripheral recesses. If the board of the other knives is now twice the chip thickness compared to the full-cutting knife, then the other knives can be dispensed with in the two recesses downstream of this recess as seen in the direction of rotation. If the board of the other knives is three or four times, more recesses can be provided without additional knives. However, there is also the possibility that, for example, a knife holder is used in the first recess, which has only the recesses labeled a). In the subsequent peripheral recess of the knife shaft, a knife holder is then provided which has only the recesses b ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Manufacture Of Wood Veneers (AREA)
EP83890008A 1982-01-21 1983-01-21 Broche d'outil pour la fabrication de capeaux plat en bois Withdrawn EP0085040A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT200/82 1982-01-21
AT20082A AT377225B (de) 1982-01-21 1982-01-21 Messerwelle zur herstellung von flaechigen holzspaenen

Publications (2)

Publication Number Publication Date
EP0085040A2 true EP0085040A2 (fr) 1983-08-03
EP0085040A3 EP0085040A3 (fr) 1986-06-11

Family

ID=3484138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83890008A Withdrawn EP0085040A3 (fr) 1982-01-21 1983-01-21 Broche d'outil pour la fabrication de capeaux plat en bois

Country Status (2)

Country Link
EP (1) EP0085040A3 (fr)
AT (1) AT377225B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125371A1 (fr) * 1983-01-21 1984-11-21 HOMBAK Maschinenfabrik GmbH u. Co KG Couteau à entailler d'un outil pour déchiqueter
EP0255546A1 (fr) * 1986-07-28 1988-02-10 Dimetal Porte-couteaux comprenant des éléments d'appui du bois pour machine à déchiqueter le bois en copeaux
AT398403B (de) * 1993-03-23 1994-12-27 Boehler Ybbstalwerke Messerwalze und kammesser für messerwellenzerspaner
WO2009111234A1 (fr) * 2008-02-29 2009-09-11 Simonds International Corporation Ensemble couteau pour toronneuse à anneaux et procédé d'utilisation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3437688C1 (de) * 1984-10-15 1986-01-23 Inter-Wood-Maschinen GmbH & Co KG, 8923 Lechbruck Messerhalterung für den Messerkopf einer Holzzerspanungsmaschine
AT514422B1 (de) * 2013-11-05 2015-01-15 Böhler Profil Gmbh Verfahren zur Herstellung von Schneidmessern

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB959240A (en) * 1962-05-21 1964-05-27 Evert Victor Bloomquist Pulverizing machine
GB1195085A (en) * 1966-09-22 1970-06-17 Alfred Kohler Improvements in or relating to a Cutting Tool.
DE2241938A1 (de) * 1972-08-25 1974-03-14 Hombak Maschinenfab Kg Messerwelle fuer holzzerspanungsmaschinen
DE2345961A1 (de) * 1973-09-12 1975-03-20 Buerener Maschf Gmbh Messerwelle fuer holzzerspanungsmaschinen
FR2332108A1 (fr) * 1975-11-21 1977-06-17 Pessa Oleodinamica Outil a detacher des copeaux de bois
FR2358249A1 (fr) * 1976-07-16 1978-02-10 Ver Edelstahlwerke Ag Jeu d'outillage de coupe pour arbres porte-lames de machine a dechiqueter le bois en copeaux
DE2915268A1 (de) * 1979-04-14 1980-10-23 Hombak Maschf Gmbh Messerwelle zur erzeugung flaechiger holzspaene

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB959240A (en) * 1962-05-21 1964-05-27 Evert Victor Bloomquist Pulverizing machine
GB1195085A (en) * 1966-09-22 1970-06-17 Alfred Kohler Improvements in or relating to a Cutting Tool.
DE2241938A1 (de) * 1972-08-25 1974-03-14 Hombak Maschinenfab Kg Messerwelle fuer holzzerspanungsmaschinen
DE2345961A1 (de) * 1973-09-12 1975-03-20 Buerener Maschf Gmbh Messerwelle fuer holzzerspanungsmaschinen
FR2332108A1 (fr) * 1975-11-21 1977-06-17 Pessa Oleodinamica Outil a detacher des copeaux de bois
FR2358249A1 (fr) * 1976-07-16 1978-02-10 Ver Edelstahlwerke Ag Jeu d'outillage de coupe pour arbres porte-lames de machine a dechiqueter le bois en copeaux
DE2915268A1 (de) * 1979-04-14 1980-10-23 Hombak Maschf Gmbh Messerwelle zur erzeugung flaechiger holzspaene

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125371A1 (fr) * 1983-01-21 1984-11-21 HOMBAK Maschinenfabrik GmbH u. Co KG Couteau à entailler d'un outil pour déchiqueter
EP0255546A1 (fr) * 1986-07-28 1988-02-10 Dimetal Porte-couteaux comprenant des éléments d'appui du bois pour machine à déchiqueter le bois en copeaux
AT398403B (de) * 1993-03-23 1994-12-27 Boehler Ybbstalwerke Messerwalze und kammesser für messerwellenzerspaner
US5456300A (en) * 1993-03-23 1995-10-10 Bohler Ybbstalwerke G.M.B.H. Cutter block and knife for a cutter spindle chipper
WO2009111234A1 (fr) * 2008-02-29 2009-09-11 Simonds International Corporation Ensemble couteau pour toronneuse à anneaux et procédé d'utilisation
US7938155B2 (en) 2008-02-29 2011-05-10 Simonds International Corporation Ring strander knife assembly and method of use

Also Published As

Publication number Publication date
AT377225B (de) 1985-02-25
EP0085040A3 (fr) 1986-06-11
ATA20082A (de) 1984-07-15

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Inventor name: BERGER, FRIEDRICH

Inventor name: SCHUERER, PETER

Inventor name: MARCHARD, GUSTAV