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WO1992011966A1 - Scie ou outil coupant comportant des dents inserees de metal dur, l'axe principal de chaque dent etant situe le long des flancs de la dent, et procede de fabrication dudit outil - Google Patents

Scie ou outil coupant comportant des dents inserees de metal dur, l'axe principal de chaque dent etant situe le long des flancs de la dent, et procede de fabrication dudit outil Download PDF

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Publication number
WO1992011966A1
WO1992011966A1 PCT/DK1992/000006 DK9200006W WO9211966A1 WO 1992011966 A1 WO1992011966 A1 WO 1992011966A1 DK 9200006 W DK9200006 W DK 9200006W WO 9211966 A1 WO9211966 A1 WO 9211966A1
Authority
WO
WIPO (PCT)
Prior art keywords
blocks
teeth
blade
hard metal
saw
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.)
Ceased
Application number
PCT/DK1992/000006
Other languages
English (en)
Inventor
Otto Mostrup
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.)
MOSTRUP ERNA
Original Assignee
MOSTRUP ERNA
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 MOSTRUP ERNA filed Critical MOSTRUP ERNA
Publication of WO1992011966A1 publication Critical patent/WO1992011966A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • 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
    • B23D63/00—Dressing the tools of sawing machines or sawing devices for use in cutting any kind of material, e.g. in the manufacture of sawing tools
    • B23D63/08—Sharpening the cutting edges of saw teeth
    • B23D63/12—Sharpening the cutting edges of saw teeth by grinding
    • 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
    • B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material

Definitions

  • the present invention relates to a saw blade having cutting tooth parts of hard metal.
  • the hard metal blocks will constitute the cutting front edge portions of the teeth, and normally they are mounted in a position in which their main plane is oriented more or less perpendicularly to the length direction of the row of teeth, optionally inclined some ⁇ what forwardly or rearwardly relative to the working direction of the blade, all according the the desired cutting angle of the tooth, and at their outer ends they are sharpened by an oblique grinding for forming a fore ⁇ most and outermost, sharp cutting edge.
  • the blocks are ground into a rearwardly narrowing shape, such that also at the sides there is provided a clearance behind the foremost, cutting side edges.
  • the grinding of the teeth may be effected in a particularly simple manner for achieving the desired cutting clearance both behind the outer tips of the teeth and behind the front side edges thereof, as for this purpose it is not necessary to utilize any com ⁇ plicated machinery for working the saw blade member tooth by tooth. Instead it is possible to use simple cutting or grinding tools, which may work the blade member by a single linear throughrun thereof, whereby it will be obtained automatically that a grinding iown of the width of each tooth from from the outer tooth end width to the smaller thickness of the carrier blade will imply that each of the inclined tooth blocks will be narrowed rearwardly, inasfar as this will also be the direction inwardly towards the carrier blade. For the production price it is very important that the required grinding can be effected that simply and rapidly, with the use of a very cheap tool system.
  • Figs. 1-3 are plan views of saw blades designed according to the invention.
  • Fig. 4 is a corresponding, enlarged view of a saw blade according to a special embodiment of the inven ⁇ tion
  • Figs. 5 and 6 are end views of the saw blade shown in conjunction with applied grinding tools.
  • Fig. 7 is a plan view of a saw blade as worked according to Figs. 5 or 6,
  • Fig. 8 is a view of the lower edge area of a thus treated saw blade
  • Fig. 9 is a perspective view of a special embodi ⁇ ment of the invention.
  • Fig. 10 is a corresponding view of a slightly modi ⁇ fied embodiment.
  • Figs. 11 and 12 are end views of special embodi ⁇ ments
  • Fig. 13 is a side view of a hard metal block used therein.
  • Fig. 14 is a perspective view of still a further embodiment of the invention.
  • Fig. 15 is a schematic illustration of a grinding operation thereon
  • Fig. 16 is a perspective end view thereof
  • Fig. 17 is a lateral view of still another embodi- ment of the invention.
  • Fig. 18 an end view thereof
  • Fig. 19 a side view of a saw blade with an asso ⁇ ciated bow member
  • Fig. 20 a side view of an alternative saw blade according to the invention.
  • Fig. 21 a lateral view of a circular saw blade.
  • a saw blade 2 consisting of a carrier blade 4, which is provided with a toothing 6 and with hard metal blocks or plates 8 secured to the teeth by hard soldering.
  • the teeth have a relatively steep front flank 10 and a more inclined rear flank 12, and the blocks 8, which may appear as flat, rectangular plate members, are secured with a flat side against the rear flank 12 and with their upper or rear end face abutting the front flank 10 of the preceding tooth.
  • the blocks 8 are slightly broader than the thickness of the carrier blade, such that they project slightly to both sides thereof. At their outer ends the blocks exhibit an end face 14 forming a desired cutting angle with the line of operation of the tooth row. This shape can be determined already by the production of the blocks 8, but it can be obtained also by a reasonably simple cross grinding of the blocks after the mounting thereof.
  • Fig. 2 it is shown that with one ground type of carrier blade 4 it is possible to produce more variants of saw blades, viz. by mounting the plate blocks 8 with a higher or lower mutual spacing.
  • the saw is de ⁇ signed such that the blocks 8 entirely fill out the tooth recesses and overlap each other slightly, hereby touching each other; they are mutually connected by the hard soldering.
  • This type of embodiment is important in that the mutually connected blocks 8 will produce a pronounced stiffening of the blade.
  • the blocks them ⁇ selves are non-bendable in an almost absolute sense, so the resulting flexibility will be limited to the small degree conditioned by the soldering material between the blocks.
  • the blade appears as a surprisingly stiff unit, what can be of large practical importance for the provision of an absulutely straight cut, while for compass saws the free end of the saw blade cannot easily come into noticeable side oscilla ⁇ tions, which under circunstances makes the sawing much easier and contributes to a higher durability of the saw.
  • Fig. 4 illustrates a further development, according to which the blocks 8 are mounted, mutually, in the same manner as in Fig. 3, but here without any toothing on the carrier blade.
  • the car ⁇ rier blade may just as well be terminated along the straight line a shown in Fig. 3, as the space occupied by the teeth 6 may then just be filled out with solder ⁇ ing material 18, as shown in Fig. 4.
  • solder ⁇ ing material 18 As shown in Fig. 4.
  • the tooth pitch can be changed by mounting the hard metal blocks in a more or less inclined position or, respectively, by using blocks of different thickness; furthermore, the tooth shape may be further modified by cross grinding, such that, by way of example, the blade member shown in Fig. 4 may be finished with a tooth configuration along the shown dotted line b. It will even be possible to produce blades with a tooth configuration that varies along the blade, e.g. with increased tooth pitch over a partial middle length. The transition to a smaller pitch at the ends can be arranged as an even transition, inas ⁇ far as the blocks 8 should not necessarily be laid in fully parallel positions.
  • soldering material should not necessarily completely fill out the triangu ⁇ lar spaces adjacent the tooth roots.
  • the presence of air spaces 18' both imply a saving of soldering material and a possibility of an improved ventilation cooling of the saw.
  • Fig. 5 will be an end or sectional view of any of the embodiments accord ⁇ ing to Figs. 1-4.
  • a clearance be provided from the outer front edge of the blocks both upwardly towards the carrier blade and rearwardly to ⁇ wards the rear side of the tooth.
  • This can be done in a very simple manner, viz. as indicated by bringing a pair of grinding discs 20 into a position, in which they just touch the carrier blade 4 at the root of the blocks and at the same time reach to the broader, lower front edge of the block, whereafter the premounted blade member is only displaced in its longitudinal direction all the way along the tooth row.
  • all the blocks will auto ⁇ matically be shaped with the contour shown in Fig. 6, i.e. with the desired clearance upwardly.
  • Fig. 6 shows that the same is obtainable by means of grinding discs 22 rotating in other planes.
  • Fig. 7 By a hatching in Fig. 7 it is indicated that the tooth sides along an uppermost zone hi will be ground fully into the side of the carrier blade 4, while along a middle zone h2 they will project increasingly from the blade side down to a lower zone h3, which represents the tooth points only, having the largest width.
  • the tooth widths In the linear zone designated H through the root areas of the shaped teeth the tooth widths will thus be somewhat between the blade width and the outer tooth width, and when the blocks are ground as described the teeth, therefore, seen from below, will automatically be shaped as shown in Fig. 8, i.e. now shaped with the desired rearward side clearance.
  • the teeth can be worked solely by a simple run-through grinding, without any individual tooth grinding.
  • Fig. 9 there is used hard metal blocks 8 of a circular cylindrical shape, and it is illustrated that also these blocks have been side ground in the discussed way, this appearing from the facets designated 26.
  • the use of such round stick blocks is very advantageous in more respects.
  • the formed lateral grooves between the blocks may convey both ventilation air and cutting liquid between the working area and the outer surroundings.
  • chip breakers there will be no need for special chip breakers, as the chips will cut with a U-shaped cross section, whereby in con ⁇ nection with their natural curving in the longitudinal direction they will be broken into very short pieces that can be received and pushed forwardly in the free triangular spaces along the rooth row.
  • the blocks are arranged as in Fig. 3, and they could be arranged according to Fig.
  • Fig. 10 is shown an embodiment corresponding to Fig. 1, but having cylindrical stick blocks; Such a design has been found well suited for sawing of concrete, where the blocks will not even have to be side ground. Even steel nails or reinforcing iron in the concrete can be cut easily.
  • the hard metal blocks can be produced with any desired shape, also with a half circular cross section or with preshaped, inclined side faces, which, by a correct mounting of the blocks, may render the said side grinding superfluous.
  • Fig. 12 it is even possible to establish a holding en ⁇ gagement between the blocks and the carrier blade, such that the blocks are mounted by insertion along the edge of the carrier blade, whereby the mounting of the blocks is further facilitated.
  • Fig. 14 The embodiment shown in Fig. 14 is characterized in that every other tooth, designated 8", is shaped with chamfered corners 34.
  • every other tooth designated 8
  • the facets 34 may be preshaped on the particular blocks, but it is another possibility that identical blocks 8 be used, only such that in the first instance all the blocks 8" are mounted, whereafter a length grinding is carried out for forming the facets 34, e.g. as suggested in Fig. 15, whereafter the remaining blocks 8 are mounted. If desired, all of the blocks may thereafter be side ground as discussed above.
  • Figs. 17 and 18 an embodiment is shown, in which the carrier blade 4 is designed with actively cutting teeth 38, at the rear flanks of which there is secured broader hard metal blocks 8 in a manner such that the outer cutting edges of these blocks are located slight ⁇ ly, e.g. 0.2-0.4 mm, higher than the points of the teeth 38.
  • the teeth 38 will form a narrow precut groove in front of the cutting blocks 38 to facilitate the working of the latter.
  • the saw blade 2 can be designed with end portions 40 which are depending beyond the cutting line of the teeth and are in a low level connected with an upstanding driving bow 42; by this arrangement, e.g. in connection with a mechanically moved cold saw, it is counteracte that the saw blade capsizes by the applied contact pressure.
  • the blocks 8 can be designed with almost any desired shape it will be possible that they can be shaped with engagement parts not only as shown in Fig. 12, but additionally as shown in Fig. 20, where they are shown having coupling parts 44,46, which, by a shooting together of the 'blocks' along the holding track designated 48 on the carrier blade 4, will hold ⁇ ingly engage each other end by end. This may stabilize the blocks to such an extent that it may be possible to reduce the strength of the fastening otherwise, e.g. such that it will be sufficient to fasten the blocks by a glueing technique that will be easier to accomplish than the discussed hard soldering.
  • the invention is in no way limited to the saw blades shown, partly because there will be many further possibilities with respect to the tooth shaping, and partly because not only 'saw blades' are concerned, but also endless saw bands and not least rotating saw blades, whether flat as shown by a loose example in Fig. 21 or cylindrical, front cutting tubular saw blades.
  • the invention is related to all kinds of cutting tools.
  • the blocks 8 should be inclined such that their front face may assume a reasonable cutting angle without the tooth point being too thin. Normally this will be possible for block inclinations up to 45-50° with the horizontal, but especially in case of negative cutting angles inclinations of up to some 60° may be usable.
  • saw blades ac ⁇ cording to Fig. 4 which are built up solely by the juxtaposition of the hard metal blocks, can be con ⁇ sidered from another angle, inasfar as, as mentioned, it is possible to shape the teeth as desired by the grind ⁇ ing thereof; at the extreme, the blocks may be located side by side, projecting perpendicularly from the mount ⁇ ing edge, such that they form a border, in which, by grinding, it is possible to produce a toothing of any desired shape, whereas the tooth pitch will not even have to correspond with the block pitch.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

On améloire habituellement l'efficacité et la durabilité des lames de scie au moyen d'éléments de métal dur fixés sur le flanc avant des dents de la scie pour constituer les arêtes coupantes et les surfaces actives des dents. Selon l'invention des amélioration importantes sont apportées par le montage des éléments de métal dur (8) en position plus couchée sur les flancs arrière (12) des dents (6), les faces d'extrémité avant (14) des éléments étant utilisées comme parties coupantes. Il est même possible de supprimer complétement les dents de la lame de scie (4) en disposant les éléments de métal dur en position correctement inclinée et en les fixant les uns aux autres ainsi qu'à une arête droite de la lame porteuse (4), de façon qu'ils constituent les dents proprement dites de la scie. Dans le procédé de fabrication, on peut utiliser une technique de rectification très simple pour obtenir l'écartement nécessaire au-dessus et derrière les arêtes coupantes actives.
PCT/DK1992/000006 1991-01-07 1992-01-07 Scie ou outil coupant comportant des dents inserees de metal dur, l'axe principal de chaque dent etant situe le long des flancs de la dent, et procede de fabrication dudit outil Ceased WO1992011966A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK0021/91 1991-01-07
DK2191A DK2191D0 (da) 1991-01-07 1991-01-07 Save- eller fraesevaerktoej og fremgangsmaade til fremstilling af samme

Publications (1)

Publication Number Publication Date
WO1992011966A1 true WO1992011966A1 (fr) 1992-07-23

Family

ID=8088851

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1992/000006 Ceased WO1992011966A1 (fr) 1991-01-07 1992-01-07 Scie ou outil coupant comportant des dents inserees de metal dur, l'axe principal de chaque dent etant situe le long des flancs de la dent, et procede de fabrication dudit outil

Country Status (3)

Country Link
AU (1) AU1187892A (fr)
DK (1) DK2191D0 (fr)
WO (1) WO1992011966A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE328187C (de) * 1920-10-25 Adolf Sieper Metallkreissaege
DE1926246A1 (de) * 1969-05-22 1970-11-26 Pahlitzsch Dr Ing Gotthold Kreissaegeblaetter mit tangentialartig angeordneten Schneidstoffplaettchen
FR2052136A5 (fr) * 1969-07-22 1971-04-09 Techmeta
US3712348A (en) * 1970-01-14 1973-01-23 Lipowsky F Sagen U Maschinen M Saw blade for a frame saw having teeth with reinforced edges
US4098149A (en) * 1976-11-11 1978-07-04 Wright James L Grinding machine
US4135421A (en) * 1977-08-19 1979-01-23 North American Products Corp. Quiet running circular saw blade
US4324163A (en) * 1980-05-19 1982-04-13 Lavelle Donald R Circular saw construction
SE434607B (sv) * 1977-04-16 1984-08-06 Glynn Arthur Ellis Skerblad innefattande en kropp med tender samt forfarande for framstellning av detta
WO1991005636A1 (fr) * 1989-10-10 1991-05-02 Tyrolit Schleifmittelwerke Swarovski K.G. Meule a tronçonner

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE328187C (de) * 1920-10-25 Adolf Sieper Metallkreissaege
DE1926246A1 (de) * 1969-05-22 1970-11-26 Pahlitzsch Dr Ing Gotthold Kreissaegeblaetter mit tangentialartig angeordneten Schneidstoffplaettchen
FR2052136A5 (fr) * 1969-07-22 1971-04-09 Techmeta
US3712348A (en) * 1970-01-14 1973-01-23 Lipowsky F Sagen U Maschinen M Saw blade for a frame saw having teeth with reinforced edges
US4098149A (en) * 1976-11-11 1978-07-04 Wright James L Grinding machine
SE434607B (sv) * 1977-04-16 1984-08-06 Glynn Arthur Ellis Skerblad innefattande en kropp med tender samt forfarande for framstellning av detta
US4135421A (en) * 1977-08-19 1979-01-23 North American Products Corp. Quiet running circular saw blade
US4324163A (en) * 1980-05-19 1982-04-13 Lavelle Donald R Circular saw construction
WO1991005636A1 (fr) * 1989-10-10 1991-05-02 Tyrolit Schleifmittelwerke Swarovski K.G. Meule a tronçonner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 9, No. 198, M404; & JP,A,60 062 409, (10.04.1985), (TETSUKAZU NAKAJIMA). *

Also Published As

Publication number Publication date
DK2191D0 (da) 1991-01-07
AU1187892A (en) 1992-08-17

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