EP1276595B1 - Schneidkopf für profilzerspannfräswerkzeug - Google Patents

Schneidkopf für profilzerspannfräswerkzeug Download PDF

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Publication number
EP1276595B1
EP1276595B1 EP01931740A EP01931740A EP1276595B1 EP 1276595 B1 EP1276595 B1 EP 1276595B1 EP 01931740 A EP01931740 A EP 01931740A EP 01931740 A EP01931740 A EP 01931740A EP 1276595 B1 EP1276595 B1 EP 1276595B1
Authority
EP
European Patent Office
Prior art keywords
circular blade
chipping
blade
cutter head
disposed
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
EP01931740A
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English (en)
French (fr)
Other versions
EP1276595A1 (de
Inventor
Ossi Suntio
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.)
Heinolan Sahakoneet Oy
Original Assignee
Heinolan Sahakoneet Oy
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Filing date
Publication date
Application filed by Heinolan Sahakoneet Oy filed Critical Heinolan Sahakoneet Oy
Publication of EP1276595A1 publication Critical patent/EP1276595A1/de
Application granted granted Critical
Publication of EP1276595B1 publication Critical patent/EP1276595B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B27L11/007—Combined with manufacturing a workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/021—Types of set; Variable teeth, e.g. variable in height or gullet depth: Varying pitch; Details of gullet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/02—Structural design of saw blades or saw teeth
    • B27B33/08—Circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/20—Edge trimming saw blades or tools combined with means to disintegrate waste
    • 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
    • B27G13/08—Cutter blocks; Other rotary cutting tools in the shape of disc-like members; Wood-milling cutters

Definitions

  • the invention relates to the cutter head of a chipping canter as defined in the preamble of claim 1.
  • the operations performed in the chipping canter line of a sawmill comprise dressing and chipping of the opposite sides of a piece of wood to be processed, such as a log or a cant, into plane surfaces by means of a chipping canter, followed by the actual sawing of the log or the cant.
  • a piece of wood to be processed such as a log or a cant
  • FI patent specification 73378 we refer to FI patent specification 73378, for instance.
  • a prior art cutter head of a chipping canter is shown in figures 1 and 2 of the drawing, and its operation is illustrated in figure 3.
  • the cutter head 1 of the chipping canter includes a frame 2 and a plurality of chipping blades 3; 3 1 , 3 2 , 3 3 , 3 4 , 3 5 , 3 6 .
  • the chipping blades 3 are disposed in connection with the frame 2. They are fastened peripherically on the border area of the frame 2 and are spaced by regular mutual intervals.
  • the chipping blades 3; 3 1 , 3 2 , 3 3 , 3 4 , 3 5 , 3 6 are arranged at 60 ° angular distances on the outer periphery of the frame 2.
  • the cutter head 1 comprises a circular blade 4 disposed in connection with the frame 2 in the vicinity of the chipping blades 3.
  • the cutter head 1 is rotated from the shaft by means of any suitable actuator, such as an electric motor (not represented in the drawings).
  • the circular blade 4 is removably fastened to the frame 2.
  • the chipping blades 3, in turn, are also fastened removably to the outer periphery 2a of the frame 2 with their blade edges extending to the vicinity of the teeth 5 of the circular blade 4, as illustrated in figure 3.
  • the circular blade 4 and the chipping blades 3 rotate in direction B at the same rotating speed.
  • the circular blade 4 acts as a surface blade, which leaves a kerf in the surface of the cant or the spar without slitting the wood.
  • the chipping blades 3, in turn, are used to cut chip pieces from the wood material on the other side of the kerf.
  • the revolution pattern 30 described by the chipping blades 3 is partly shown in figure 2.
  • Two cutter heads 1 are disposed facing each other at an adjustable mutual distance in the chipping canter line.
  • the cutter heads 1 are operated in the same direction with suitable prime movers, such as electric motors.
  • the piece of wood to be processed is run between the cutter heads 1 with its opposite sides dressed simultaneously.
  • the occlusion of the circular blade teeth 5 should be sufficiently small, preferably 2 mm or less. Accordingly, there must be room for at least thirteen teeth 5 in the circular blade sector 40; 40 1 between two consecutive chipping blades 3; 3 1 , 3 2 , with the depth L of the kerf U (and the related chip length 1) being 26 mm.
  • the tooth 5 of the circular blade should extend in front of the chipping edge 3; 3 1 , 3 2 in each circular blade sector 40; 40 1 , to prevent the chipping blade 3 from slitting holes in the wood material P on the other side of the circular blade, not even at knots.
  • the gullet 6 between the teeth 5 of the circular blade should extend to a depth such that sawdust can leave the kerf U and the gullet of the circular blade 4 into the free space on the chipping blade 3 side (arrow C, figure 3) during the entire cutting operation.
  • the tooth height and the occlusion of the circular blade 4 being high, there is not enough room for the amount of sawdust produced during dressing to escape through the clogged gullets 6 at the rear end of the circular blade and chipping blade sector 40.
  • the teeth 5 of the circular blade are increased in length h and number in the circular blade sector 40 between the chipping blades 3. This, again, involves the problem of the teeth 5 having a height and a number such that their strength and rigidity are no longer sufficient, so that they tend to break during use.
  • the object of the invention is to eliminate the drawbacks relating to the cutter head of a chipping canter as described above.
  • Another object of the invention is to provide a new cutter head for a chipping canter.
  • the cutter head of a chipping canter of the invention is characterised by the features defined in claim 1.
  • the dependent claims define preferred embodiments of the invention.
  • the cutter head of the chipping canter of the invention comprises a frame, a plurality of chipping blades disposed peripherically at mutual intervals in connection with the frame, and a circular blade disposed in connection with the frame in the vicinity of the chipping blades.
  • the cutter head also comprises a dressing means which is disposed in each circular blade sector between the chipping blades, whose cutting knife portion has been disposed in the saw line of the circular blade, the width of the cutting knife portion in a plane perpendicular to the direction of rotation of the circular blade being greater than the width of the circular blade teeth in the corresponding plane, the dressing means having been adapted to co-operate with the circular blade in order to at least partly enlarge the kerf produced with the circular blade in the wood to be processed.
  • the inventive idea consists in the kerf being enlarged with the dressing means at the same time as the kerf is formed with the circular blade. This yields the benefit of providing a broad path for the sawdust discharged from the kerf.
  • the knife portion of the dressing means has a cutting blade edge that is tilted in a plane perpendicular to the direction of rotation of the circular blade and tilted especially to the chipping blade side, the blade edge serving to enlarge the mouth of the kerf.
  • the dressing means is used particularly to enlarge the mouth of the kerf while the kerf is being formed.
  • the wedge-like wood tip of the chip piece to be cut with the chipping blade is preferably shortened by the length of the blade edge, which is enough to ensure a passage for the sawdust discharged from the kerf.
  • the invention also has the advantage of allowing the teeth of the circular blade to be shortened relative to the previous tooth length.
  • the height of the teeth can be reduced by the length of the blade edge of the dressing means, the wood tip of the chip piece being consequently shortened by this length.
  • a circular blade formed in this manner will be resistant and efficient.
  • the teeth of the circular blade can be increased in number in the circular blade sector between the chipping blades, compared to prior art solutions.
  • a circular blade sector of the same size can accommodate a larger number of low teeth than in prior art solutions.
  • the number of chipping blades can be increased, and at the same time their angular distance and the central angle of the sector can be decreased, so that the circular blade sector still can receive the same number of teeth as before.
  • the quality of the dressed cant sides can be improved since the number of teeth in the circular blade sector can be increased from the previous number over the angular distance used between the chipping blades.
  • the invention has the additional advantage of allowing the chip length of the chips cut with the cutter head to be increased. Additional teeth can be inserted between the chipping blades in the circular blade sector, and thus the depth of the kerf can also be increased along with the increased occlusion of the teeth.
  • the invention also has the advantage of allowing the kerf cut with the circular blade to be narrowed. Since the teeth of the circular blade are low, they are preferably also thin, and then the kerf will also be narrow. Generally speaking, the kerf is narrower than in conventional cutter heads. This also yields the benefit of the wood portion lost during the cutting of the tip portion of the chip piece being compensated by the narrow kerf.
  • FIG 4 illustrates a part of the cutter head 7 of the chipping canter of the invention.
  • the cutter head 7 has the same parts as the prior art cutter head 1 in figures 1 and 2.
  • the cutter head 7 comprises a frame 2, a plurality of chipping blades 3; 3 1 , 3 2 , which are disposed peripherically on the border area of the frame 2 at mutual intervals.
  • the circular blade 8 is disposed in connection with the frame 2.
  • the circular blade 8 and the chipping blades 3; 3 1 , 3 2 are disposed at appropriately short mutual intervals, in principle in the same manner as in the conventional cutter head in figures 1 and 2.
  • the basic structure of the circular blade 8 is identical to that of the conventional circular blade 4.
  • the circumference of the circular blade 8 has a plurality of teeth 9, spaced by gullets 10.
  • the locations of three consecutive chipping blades 3; 3 1 , 3 2 , 3 6 are schematically indicated only with arrows HP; HP1, HP2, HP6 in figure 4 (similarly also in figure 1 for the sake of illustration).
  • a given number of teeth 9 are disposed in the circular blade sector 40; 40 1 , 40 2 , thirteen teeth in this embodiment, which perform the forming of the kerf U in the wood material P.
  • a dressing means 11; 11 1 , 11 2 is disposed in connection with the cutter head 7, with its cutting knife portion 12 disposed on the saw line of the circular blade 8, i.e. in the plane of the circular blade, on level with its teeth.
  • the width TE of the knife portion 12 of the dressing means 11 in a plane perpendicular to the direction of rotation B of the circular blade 8 is greater than the width T of the circular blade teeth 9.
  • the dressing means 11 is disposed to cooperate with the circular blade 8 for at least partial enlargement of the kerf U produced by means of the circular blade in the processed wood P.
  • the knife portion 12 of the dressing means 11; 11 1 , 11 2 comprises a cutting blade edge 12a, which is at an angle ⁇ in the range of 0 ° to 75 °, preferably 45 °, in a plane perpendicular to the direction of rotation.
  • the angle ⁇ is on the side of the cutting edges 3 especially when it is above 0 °.
  • This blade edge 12a is especially used to enlarge the mouth SU of the kerf U, as schematically shown in figure 8.
  • the length S and angle ⁇ of the cutting blade edge 12a are optional. They also depend on the width TE of the dressing means 11.
  • One or more dressing means 11 can be disposed in connection with the circular blade 8. Most preferably, one facing blade 11; 11 1 , 11 2 is disposed between the chipping blades HP1, HP2 (cf. chipping blades 3; 3 1 , 3 2 in figure 1), in each circular blade sector 40; 40 1 , 40 2 .
  • the dressing means 11 is preferably mounted on the circular blade 8. Then the dressing means 11 is most preferably formed as an additional tooth of the circular blade 8, such as is schematically shown for instance in figures 4 and 5.
  • the height TK of the dressing means 11 in the radial direction of the circular blade 8 is greater than the height hu of the teeth 9 of the circular blade (cf. figure 4).
  • the height hu of the teeth 9 of the circular blade 8 in the radial direction is preferably smaller than the tooth height h of the circular blade 4 of a conventional cutter head.
  • the teeth 9 have then been shortened relative to the previous tooth length h.
  • the height hu of the teeth 9 has been reduced relative to the previous height h at the most by the length S of the blade edge 12a of the knife portion 12 (cf. figure 7).
  • the wood tip K of the chip piece is shortened by said length S, and it also corresponds to the enlargement of the kerf U in the mouth SU.
  • the dressing means 11; 11 1 , 11 2 is most preferably disposed in connection with the circular blade 8 so as to be located in the central area of each sector 40; 40 1 , 40 2 at a suitable angular distance ⁇ from and after a suitable number of teeth 9, such as four, from the preceding chipping blade 3; 3 1 , 3 2 .
  • the angular distance ⁇ has been selected such that the depth of the kerf U 1 at this stage of sawing equals at least nearly the length S of the blade edge 12a. Then the kerf U1 is enlarged by bevelling its chipping blade 3 side by means of the blade edge 12a of the dressing means 11 (cf. figure 7).
  • the operation of the cutter head 7 of the invention, especially that of the circular blade 8, the dressing means 11 and the chipping blade 3, is illustrated by figures 7 and 8.
  • the teeth 9 in each sector 40 of the circular blade 8 resume cutting a kerf U in the wood P.
  • the dressing means 11 in the central area of the sector 40 enlarges the kerf U1 produced by the teeth 9 by bevelling with the blade edge 12a the chipping blade side of the kerf U1, as shown with a broken line in figure 7.
  • the tip portion K of the chip piece P2 is thus cut off by bevelling.
  • the sawdust formed can be freely discharged from the kerf U1 in the direction of arrow E to the chipping blade side of the circular blade 8 and the dressing means 11.
  • the chipping blade 3 detaches a chip piece P2 from the wood material P, as schematically shown in figure 8.
  • the tip portion of the chip piece P2 has a bevelled surface V and the kerf U has been enlarged at the mouth SU at the stage in figure 7 above, so that the sawdust is still allowed to be freely discharged from the kerf U in the direction of arrow F to the chipping blade side of the circular blade 8.

Claims (6)

  1. Schneidkopf (1; 7) für ein Profilzerspanfräswerkzeug, mit einem Rahmen (2), einer Vielzahl von voneinander beabstandet am Umfang des Rahmens (2) angebrachten Zerspanungsmessern (3), und einem am Rahmen (2) in der Nähe der Zerspanungsmesser (3) angebrachten Kreissägeblatt (4; 8), dadurch gekennzeichnet, dass der Schneidkopf (7) eine in jedem Sektor (40) des Kreissägeblatts (8) zwischen den Zerspanungsmessern (3) angeordnete Abrichtvorrichtung (11; 111, 112) aufweist, deren Schneidmesserabschnitt (12) auf der Sägelinie des Kreissägeblatts (8) angeordnet ist, wobei die Breite (TE) des Schneidmesserabschnitts (12) in einer Ebene senkrecht zur Rotationsrichtung des Kreissägeblatts (8) größer ist als die Breite (T) der Zähne (9) des Kreissägeblatts in der entsprechenden Ebene, wobei die Abrichtvorrichtung (11) derart angebracht ist, dass durch Zusammenwirken mit dem Kreissägeblatt (8) der vom Kreissägeblatt im zu verarbeitenden Holz (P) erzeugte Sägeschlitz (U) zumindest teilweise vergrößert wird.
  2. Schneidkopf für ein Profilzerspanfräswerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass der Schneidmesserabschnitt (12) der Abrichtvorrichtung (11) eine Schneidkante (12a) aufweist, welche in einer Ebene senkrecht zur Rotationsrichtung um einen Winkel (α) zwischen 0 ° und 75 °, vorzugsweise 45 °, abgeschrägt ist, wobei der Winkel vorzugsweise auf der Seite der Zerspanungsmesser liegt und wobei die Öffnung (SU) des Sägeschlitzes (U) mittels der Schneidkante (12a) vergrößert wird.
  3. Schneidkopf für ein Profilzerspanfräswerkzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Abrichtvorrichtung (11; 111, 112) vorzugsweise mittig in jedem Sektor (40; 401, 402) des Kreissägeblatts (8) mit einem geeigneten Winkelabstand (β) zum vorausgehenden Zerspanungsmesser (3; 31, 32) angeordnet ist.
  4. Schneidkopf für ein Profilzerspanfräswerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Abrichtvorrichtung (11) in Verbindung mit dem Kreissägeblatt (8) angeordnet ist.
  5. Schneidkopf für ein Profilzerspanfräswerkzeug nach Anspruch 4, dadurch gekennzeichnet, dass die Abrichtvorrichtung (11) als ein zusätzlicher Zahn des Kreissägeblatts (8) ausgebildet ist.
  6. Schneidkopf für ein Profilzerspanfräswerkzeug nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Höhe (TK) der Abrichtvorrichtung (11) in radialer Richtung des Kreissägeblatts (8) größer ist als die Höhe (hu) der Zähne (9) des Kreissägeblatts.
EP01931740A 2000-04-28 2001-04-27 Schneidkopf für profilzerspannfräswerkzeug Expired - Lifetime EP1276595B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20001009 2000-04-28
FI20001009A FI114294B (fi) 2000-04-28 2000-04-28 Pelkkahakkurin teräpää
PCT/FI2001/000408 WO2001083175A1 (en) 2000-04-28 2001-04-27 Cutting head for chipping canter

Publications (2)

Publication Number Publication Date
EP1276595A1 EP1276595A1 (de) 2003-01-22
EP1276595B1 true EP1276595B1 (de) 2005-03-02

Family

ID=8558310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01931740A Expired - Lifetime EP1276595B1 (de) 2000-04-28 2001-04-27 Schneidkopf für profilzerspannfräswerkzeug

Country Status (4)

Country Link
EP (1) EP1276595B1 (de)
DE (1) DE60109145T2 (de)
FI (1) FI114294B (de)
WO (1) WO2001083175A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI116208B (fi) 2003-03-21 2005-10-14 Kauko Rautio Teräpää
FI123330B (fi) * 2010-09-21 2013-02-28 Ttt Technology Oy Ab Pelkkahakkurin pyöröterä, teräelementti ja teräyksikkö

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1628893C3 (de) * 1968-01-19 1974-02-28 Hans Beckenried Naepflin (Schweiz) Hartmetall-Kreissägeblatt
US4984614A (en) * 1990-03-08 1991-01-15 Hi-Tech Engineering And Machine Company, Inc. Combined saw and chipper head
DE19513699C1 (de) * 1995-04-11 1996-04-25 Linck Masch Gatterlinck Werkzeugkopf für Profilzerspaner

Also Published As

Publication number Publication date
DE60109145D1 (de) 2005-04-07
WO2001083175A1 (en) 2001-11-08
FI114294B (fi) 2004-09-30
FI20001009A (fi) 2001-10-29
DE60109145T2 (de) 2006-02-16
EP1276595A1 (de) 2003-01-22
FI20001009A0 (fi) 2000-04-28

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