EP0213076A2 - Lame de scie à dents de scies agencées de façon amovible - Google Patents

Lame de scie à dents de scies agencées de façon amovible Download PDF

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Publication number
EP0213076A2
EP0213076A2 EP86810355A EP86810355A EP0213076A2 EP 0213076 A2 EP0213076 A2 EP 0213076A2 EP 86810355 A EP86810355 A EP 86810355A EP 86810355 A EP86810355 A EP 86810355A EP 0213076 A2 EP0213076 A2 EP 0213076A2
Authority
EP
European Patent Office
Prior art keywords
tooth
saw blade
machine saw
blade according
blade
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Withdrawn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
EP86810355A
Other languages
German (de)
English (en)
Other versions
EP0213076A3 (fr
Inventor
Ulrich Bühler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0213076A2 publication Critical patent/EP0213076A2/fr
Publication of EP0213076A3 publication Critical patent/EP0213076A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/14—Straight saw blades; Strap saw blades with inserted saw teeth, i.e. the teeth being individually inserted
    • B23D61/16—Straight saw blades; Strap saw blades with inserted saw teeth, i.e. the teeth being individually inserted in exchangeable arrangement
    • 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
    • B27B33/12—Saw blades having inserted or exchangeably arranged bits or toothed segments
    • 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
    • B23D61/04—Circular saw blades with inserted saw teeth, i.e. the teeth being individually inserted
    • B23D61/06—Circular saw blades with inserted saw teeth, i.e. the teeth being individually inserted in exchangeable arrangement

Definitions

  • the present invention relates to a machine saw blade, in particular a gang saw blade or circular saw blade for wood, with a blade body and a plurality of teeth.
  • the service life of a normal saw blade made of low-alloy tool steel for frame saws is only a few hours.
  • Frame saw blades are known which have welded teeth made of high-alloy steel, e.g. from "Stellite", and have an increased service life compared to ordinary saw blades. In comparison to the increased costs, however, the service life is still relatively short, so that the frame saw blades with teeth made of high-alloy steel did not want to displace the usual frame saw blades.
  • the respective tooth is part of a tooth body which is interchangeably inserted in the blade body.
  • This training makes it easy to replace damaged or dull teeth.
  • the tooth body has a plurality of teeth, each of which the desired tooth can be brought into the working position by loosening, rotating and reattaching the tooth body.
  • the tooth body can have two teeth, and the second tooth can be brought into the cutting position when the first tooth has become blunt.
  • a particularly important exemplary embodiment of the invention provides that the tooth body is inserted into a lateral recess on the blade body.
  • the formation of a lateral recess on the blade body has the advantage that the blade body is only slightly weakened as a result. It is particularly advantageous if the tooth body has two parallel side surfaces that adjoin two guide surfaces of the recess. This allows forces acting on the tooth to be safely transmitted to the blade body.
  • the parallel arrangement The side surfaces and the guide surfaces allow close tolerances to be observed because the distance between the surfaces can be measured well.
  • One of the guide surfaces expediently runs practically parallel to the breast of the tooth. This enables the formation of a large chip space between the individual teeth. A sufficient chip space is very important for machine saw blades because no chips can escape during the cutting stroke until the tooth emerges from the wood. Up to this point, practically all of the chips that are produced must find their place in the chip space.
  • the tooth is wider than the leaf body, it advantageously projecting equally far beyond the leaf body on both sides.
  • Each tooth therefore processes the full cutting width, so that relatively large feeds are possible.
  • the construction of the tooth body is advantageously such that the tooth projects further on one side of the tooth body than on the other side of the tooth body.
  • the projecting part of the tooth can be supported on a support surface of the blade body.
  • the tooth body advantageously has a recess for receiving a nut, so that it can be attached to the blade body with a screw and a nut. Due to the small thickness of the blade body, there is little space available for the fasteners.
  • the recess for receiving the nut is conical and has a diameter which is at least three times larger than the thread diameter. This creates a large friction surface, which enables the use of a conical nut. Even if it were possible to provide a hexagonal recess for a hexagon nut, the described embodiment has the advantage of much cheaper manufacturing costs.
  • the tooth body advantageously has a plurality of teeth, of which the desired tooth can be brought into the working position by loosening, rotating and reattaching the tooth body. If a tooth becomes dull or breaks off, the sawing staff can easily repair the machine saw blade.
  • a receiving opening for receiving the tooth that is not in the position of use is expediently provided in the blade body.
  • the tooth bodies can be attached alternately on different sides of the blade body. This ensures that the machine saw blade is evenly loaded during operation. It is then also possible to dimension the width of a tooth of the respective tooth body in such a way that it only corresponds to part of the cutting width of the machine saw blade. So two teeth are always necessary to achieve the full cutting width, as is the case with the usual machine saw blades. In such a case, it is advantageous to arrange the recess for receiving the tooth body so inclined in the leaf body that the tooth which is not in the position of use does not or does not open both sides protrude the same amount from the receiving opening. This has the advantage that the tooth that is not in the position of use does not come into contact with the cut surfaces in the workpiece because there is a free space on each side of the tooth.
  • FIG. 1 shows a section of a machine saw blade 10, in which a plurality of tooth bodies 11 (FIGS. 2 and 3) are inserted alternately on different sides of the blade body 13 in side cutouts 15.
  • the respective tooth body 11 has two parallel side surfaces 17, 19 which adjoin two corresponding guide surfaces 21, 23 of the recess 15.
  • the guide surfaces 21, 23 are arranged practically parallel to the breast 27 of the tooth 11.
  • the tooth 12 is wider than the remaining part of the tooth body 12.
  • the tooth 12 is arranged such that it projects equally far beyond the blade body 13 on both sides.
  • the tooth width of the tooth 12 ent thus speaks of the cutting width of the machine saw blade. This is a significant advantage because, in contrast to the usual entangled teeth, each tooth then processes the full cutting width.
  • the tooth 12 protrudes further on one side than on the other side.
  • the projecting part 29 is therefore supported on a support surface 31 (FIG. 1), so that forces acting on the tooth 12 are at least partially transmitted to this support surface 31.
  • the tooth body 11 is designed as a so-called reversible knife, i.e. it has at least two teeth 12, of which the desired tooth 12 can be brought into the working position by loosening, rotating and reattaching the tooth body 11. The tooth that is then not in the working position is received by the receiving opening 32, which is designed as a bore, in the blade body.
  • the tooth body 11 has a recess 33 for receiving a nut 35 and is fastened to the blade body 11 with a screw 37.
  • the recess 33 for receiving the nut 35 is conical and has a diameter which is at least three times larger than the thread diameter. Accordingly, the nut 35 also has a large diameter, so that it does not turn when the screw is tightened, because a sufficient friction surface 34 is available for holding the nut 35.
  • the lateral surfaces 39 of the teeth 12 are inclined at an angle, so that a so-called lateral clearance angle is created, which prevents that the surfaces 39 rub against the cut surfaces of the workpiece.
  • Such lateral clearance angles can generally not be provided, or only to an insufficient extent, in the case of the conventional saw blades.
  • the use of interchangeably inserted tooth bodies 11 in the blade body 13 therefore also has advantages in this regard.
  • a tooth 12 processes only part of the cutting width.
  • the recess 15 for receiving the tooth body 11 is arranged inclined in the leaf body 13 such that the tooth 12 which is not in the position of use is practically completely in the receiving opening. So it does not protrude from the receiving opening or only a little and the same amount on both sides. Since the width of the tooth 12 is smaller than the cutting width, the tooth that is not in the position of use comes into contact with the cutting surfaces of the workpiece only slightly or only slightly so that it is not damaged.
  • the following tooth 12 ' is shown in broken lines in FIG. 4, so that it can be seen which is the cutting width of the machine saw blade according to this embodiment.
  • tooth bodies 11 are arranged alternately on different sides of the blade body 13, different types of tooth bodies are necessary. They differ from one another only in their mirror-symmetrical design. To understand the invention, it is therefore sufficient if only one type of tooth body 11 is shown in detail, as FIG. 2 does.
  • the tooth bodies are arranged along a straight line. But it is also the arrangement on a curve, e.g. possible in a circle. In other words, the invention is also applicable to circular saw blades.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
EP86810355A 1985-08-12 1986-08-12 Lame de scie à dents de scies agencées de façon amovible Withdrawn EP0213076A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3446/85 1985-08-12
CH3446/85A CH666852A5 (de) 1985-08-12 1985-08-12 Maschinensaegeblatt, insbesondere gattersaegeblatt fuer holz.

Publications (2)

Publication Number Publication Date
EP0213076A2 true EP0213076A2 (fr) 1987-03-04
EP0213076A3 EP0213076A3 (fr) 1987-08-26

Family

ID=4256123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810355A Withdrawn EP0213076A3 (fr) 1985-08-12 1986-08-12 Lame de scie à dents de scies agencées de façon amovible

Country Status (2)

Country Link
EP (1) EP0213076A3 (fr)
CH (1) CH666852A5 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001247A1 (fr) * 1996-01-02 1999-01-14 Pauli Haapasalo Construction de lame pour machine coupante
WO2014111915A1 (fr) 2013-01-16 2014-07-24 Iscar Ltd. Outil de coupe comprenant élément rapporté de coupe ayant des flancs latéraux ne venant pas en butée

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT139329B (de) * 1932-11-23 1934-11-10 Josef Hafner Sägeblatt.
DE2315044A1 (de) * 1973-03-26 1974-10-10 Hans Heinlein Wendeplatte fuer spanabhebende werkzeuge
DE2743304A1 (de) * 1977-09-27 1979-04-05 Kieninger Walter Kg Schneidzahnanordnung fuer kreissaegeblaetter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001247A1 (fr) * 1996-01-02 1999-01-14 Pauli Haapasalo Construction de lame pour machine coupante
WO2014111915A1 (fr) 2013-01-16 2014-07-24 Iscar Ltd. Outil de coupe comprenant élément rapporté de coupe ayant des flancs latéraux ne venant pas en butée

Also Published As

Publication number Publication date
CH666852A5 (de) 1988-08-31
EP0213076A3 (fr) 1987-08-26

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