EP0380498A1 - Lames de scie contrarotatives - Google Patents

Lames de scie contrarotatives

Info

Publication number
EP0380498A1
EP0380498A1 EP19880906833 EP88906833A EP0380498A1 EP 0380498 A1 EP0380498 A1 EP 0380498A1 EP 19880906833 EP19880906833 EP 19880906833 EP 88906833 A EP88906833 A EP 88906833A EP 0380498 A1 EP0380498 A1 EP 0380498A1
Authority
EP
European Patent Office
Prior art keywords
saw
saw blades
pair
blades
teeth
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Withdrawn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
EP19880906833
Other languages
German (de)
English (en)
Inventor
Sven Runo Vilhelm Gebelius
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 EP0380498A1 publication Critical patent/EP0380498A1/fr
Withdrawn legal-status Critical Current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
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/10—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a plurality of 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
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles

Definitions

  • the present invention relates to two saw blades used as a pair of saw blades, arranged to take up a saw cut in a work piece as a simultaneous and co-acting operation during rotation in two counter-rotating rotary directions.
  • the technique of using pairs of counter-rotating saw blades involves major advantages in relation to sawing performed with one saw blade only.
  • the saw blades arranged as a pair may resiliently move away from each other at the outer and cutting peripheral portions, resulting in an increase of the intermediate gap therebetween.
  • the width of the saw cut in the work piece is obviously also increased, and thus the quantity of material removed, but furthermore, the saw blades attempt to move to the left or to the right from an intended sawing line.
  • no solution is known from the prior art.
  • the object of the present invention is to disclose a pair of saw blades which facilitate maximum feeding speed, while maintaining a small separating gap at the outer portions of the saw blades.
  • a straight line of sawing can be achieved at high feeding speeds, and the width of the saw cut can be maintained small, with a minimum of material removed in connection with the sawing operation.
  • far more advantageous cutting properties are achived than those offered by means of conventional saw blades, a feature resulting in improved cutting properties and a reduced sound level in relation to prior art.
  • a pair of saw blades according to the present invention includes two each other adjacently located saw blades, arranged to take up a saw cut in a work piece in a simultaneous and co-acting operation during rotation in relation to each other counter-rotating directions, and is mainly characterised in that the saw teeth of the saw blades are arranged with a specific inclination for each saw blade at the cutting edge portion for related saw teeth, and that the saw teeth in a pair of saw blades thereby are arranged to take up contact as a first portion with a work piece with the part of each saw tooth that is closest to the co-acting saw blade, thereby imposing a force arranged to displace the saw blades in direction towards each other.
  • Fig. 1 is a cross-sectional view of a work piece, whereagainst a pair of saw blades according to a first embodiment of the present invention are arranged with two saw teeth in contact with the work piece;
  • Fig. 2 is a view corresponding to Fig. 1, in which the pair of saw blades constitute a second embodiment of the present invention
  • Fig. 3 is a side view of an embodiment of a saw blade as included in a pair of saw blades according to the present invention
  • Fig. 4 is a perspective view showing a suspending part of a saw, by means of which a saw blade included in a pair of saw blades is intended to be carried;
  • Fig. 5 is a cross-sectional view of a further example of an embodiment of a pair of saw blades according to the present invention.
  • Fig. 6 is a cross-sectional view of a pair of saw blades according to the present invention, showing a further modification
  • Fig. 7 is a plan view of a saw tooth at a saw blade, modified in relation to what is shown 1n Figs. 1 and 2.
  • each saw blade 1, 2 includes saw teeth 3, 4 having the outer and cutting edge portions arranged inclined in relation to a plane coinciding with the rotary centre of the saw blades 1, 2.
  • Fig. 1 shows a work piece 5, two each other adjacently located saw blades 1, 2, and a saw tooth, 3 and 4 respectively, at each saw blade in contact with the work piece 5. All saw teeth 3, 4 at each saw blade 1, 2 are arranged substantially similar, i.e. having an inclination corresponding to what is shown for the cross-hatched saw teeth 3, 4.
  • each saw tooth 3 will thus first take up contact with the work piece 5 by means of a portion adjacent to the saw blade 2, and during a continued movement of the saw blade 1, the saw tooth 3 will thus successively take up contact with the work piece 5 in its entire width in direction towards the plane of the saw blade 1 which 1s directed away from the other saw blade 2.
  • This feature applies correspondingly to the other saw blade 2, i.e. the saw teeth 4 of same will Initially take up contact with the work piece 5 by means of a portion adjacent to the first saw blade 1, and the saw teeth 4 make thereafter successively contact in direction towards the plane of the saw blade 2 which is directed away from the first saw blade 1.
  • each saw tooth 3, 4 in this fashion successively makes contact with the work piece, and that contact is made beginning from the portion most adjacent to the other saw blade 1, 2, results in a transverse force applied by means of the saw teeth 3, 4 in relation to the plane of the saw blades 1, 2, attempting to force the outer portions of the saw blades 1, 2 against each other.
  • saw blades 1, 2 are shown with the saw teeth 3, 4 completely non-set.
  • the setting or bending of the saw teeth 3, 4 may also be used to accomplish the technical effect described above with reference to the embodiment shown in Fig. 1.
  • Fig. 2 shows how each saw blade 1, 2 can be arranged with saw teeth 3, 4 set (bent) in one direction only, that is in direction from co-acting saw blade 1, 2.
  • each saw tooth 3, 4 will function substantially similar to the embodiment described with reference to Fig. 1, i.e. each saw tooth 3, 4 will make contact with a portion located adjacent to co-acting saw blade 1, 2, resulting in establishment of a force acting to move the saw blades 1, 2 in direction towards each other.
  • each saw tooth 3, 4 successively makes contact with a work piece 5 will also result in a "softer" contact, and thus a possibility to achieve an improved cutting operation, as well as a reduced sound level during a sawing operation.
  • a saw blade 1, 2 arranged according to the present invention is only usable in combination with a second saw blade 1, 2, and that use as single units will result in obvious disadvantages, such as that the saw blade 1, 2 will try to perform a movement in one side direction.
  • the saw blades 1, 2 according to the invention thus require to be used in pairs, as well as application of a force acting to separate the saw blades 1, 2.
  • the saw blades 1, 2 should be arranged in such a way, that internally Incorrect mounting is avoided. This may, for example, be achieved by manufacturing the saw blades 1, 2 including such means for the attachment of the saw blades 1, 2 that an incorrect mounting is made impossible, and an example of this is shown in Fig. 3.
  • the saw blades 1, 2 are in this case assumed to be mounted on supporting shafts including a longitudinally extending grove in each shaft, but also having an outwardly extending means extending in the same longitudinal direction.
  • Each saw blade 1, 2 includes a centrally located hole 6 having a diameter substantially corresponding to the diameter of assciated supporting shaft, and by the edge portion of said hole 6, a member 7 is arranged directed towards the rotary center,
  • each saw blade 1, 2 may only be mounted on one of the supporting shafts, but prevents on the other hand also the saw blades 1, 2 from being turned in an Incorrect relationship to each other. It should be noted, that this embodiment facilitates that the saw blades 1, 2 may be an Identical pair, which when mounted as a pair receive intended location, both with regard to working direction as well as with regard to the location of the saw teeth 3, 4, i.e. with the saw teeth located in accordance with what is shown in Figs. 1 and 2.
  • the saw blades 1, 2 may be arranged identical is obviously a major advantage from manufacturing point of view, obviously reducing both manufacturing and storage costs.
  • Fig. 4 shows an example of such an embodiment, including a discshaped member 9, intended to be driven by a saw motor in a certain rotary direction, and including a number of pin-shaped members 10, 10 " , 10", located irregular in relation to each other, arranged to facilitate insertion into correspondingly located through holes in a saw blade 1, 2, and to carry and impose a rotary movement on the saw blade 1, 2.
  • the irregular location of the pin-shaped members 10, 10 " , 10" has been accomplished by different internal angular relationships, indicated as VI and V2, but also other alternatives exist, e.g. by arranging at least one of the pin-shaped members 10, 10 " , 10" at a different distance from the rotary center in relation to remaining pin-shaped members 10, 10 " , 10". If at least one of the pin-shaped members 10, 10", 10" is arranged having an individual diameter, and corresponding holes in the saw blade 1, 2 are adjusted accordingly to the pin-shaped members 10, 10 " , 10" used, the requirement of an irregular location of the pin-shaped members 10, 10 " , 10" can be disregarded.
  • the saw blades 1, 2 may be arranged having at least one outwardly directed portion from one side surface, which secures correct location.
  • two saw blades 1, 2 are shown in Fig. 5, having in direction from each other centrally located embossed portions 11, 11 " .
  • Such an arrangement makes it impossible to mount the saw blades 1, 2 Incorrectly.
  • Fig. 6 shows a cross-sectional view of a portion of two saw blades 1, 2 of the type arranged with through holes, which, during the rotary movement of the saw blades 1, 2, result in an increased air pressure between the saw blades 1, 2, in order to accomplish and maintain a separating gap therebetween.
  • All embodiments described with reference to Figs. 3 - 6 thus facilitate possibility to use identical saw blades 1, 2 in a pair of saw blades, secure correct mounting of the saw blades 1, 2, and facilitate also a restricted movement of the saw blades 1, 2 in direction to/from each other.
  • the examples of embodiments of saw teeth 3, 4 described with reference to Figs. 1 and 2 result on one hand in that the saw blades 1, 2 during a sawing operation try to maintain an adjacent relationship to each other, but facilitate also on the other hand good cutting properties, due to the "soft" and successive contact established by each saw tooth 3, 4 and a work piece 5.
  • FIG. 7 Shown and described saw blades 1, 2 are only intended to serve as examples of embodiments of saw blades 1, 2 that can be used to form a pair of saw blades according to the invention, since, as previously mentioned, further modifications obviously can be carried out, and an example of such a further modification is shown in Fig. 7.
  • Said figure intends to disclose the possibility to attach, for example, cutting members 13 of hard carbide or other material to the saw teeth 3 of a saw blade 1, and this is shown in conjunction with a set saw tooth 3 of the type previously discussed with reference to Fig. 2.
  • Such a cutting member 13 is advantageously as shown arranged having a larger width extension than the width of the supporting saw tooth 3, and as a result, safety is obtained against formation of a non-machined central strip during a sawing operation, which coul d enter between the saw blades 1, 2. As shown, the cutting member 13 extends in direction towards the plane located adjacent a co-acting saw blade in the pair of saw blades.
  • Cutting members 13 of a similar type can also be used for a non-set saw blade 1, 2 of the type described with reference to Fig. 1, and for such a purpose, the cutting members 13 are advantageously arranged with a l arger width extension than the width of the supporting saw teeth 3, 4, and extending in direction away from co-acting saw blade included in the pair of saw blades.
  • Such an embodiment woul d result in advantages otherwise obtained by means of a setting operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

Une paire de lames de scie comporte deux lames de scie (1, 2) disposées adjacentes l'une à l'autre et destinées à effectuer un trait de scie dans une pièce à usiner (5), conjointement et en coopération lors d'un mouvement de rotation s'effectuant dans des directions contrarotatives. Selon la présente invention, les dents (3, 4) des lames de scie (1, 2) présentent une inclinaison spécifique pour chaque lame (1, 2) au niveau de la partie tranchante des dents correspondantes (3, 4). Les dents (3, 4) d'une paire de lames de scie peuvent ainsi entrer en contact, à titre de première partie, avec une pièce à usiner, avec la partie de chaque dent (3, 4) la plus proche de la lame (1, 2) agissant conjointement, imprimant ainsi une force destinée à déplacer les lames (1, 2) l'une vers l'autre. Lors de l'ajustage des dents de scie (3, 4), on place les dents (3, 4) de chaque lame (1, 2) dans une direction latérale seulement, et dans une direction contraire au plan destiné à former un plan adjacent par rapport à la lame (1, 2) agissant conjointement. Les lames de scie (1, 2) qui forment une paire de lames de scie sont de préférence munies d'un organe destiné uniquement à faciliter la fixation des lames (1, 2) dans une relation adjacente l'une par rapport à l'autre, les lames (1, 2) étant placées l'une par rapport à l'autre selon une disposition relative correcte du point de vue de leur direction vers l'intérieur.
EP19880906833 1987-07-14 1988-07-14 Lames de scie contrarotatives Withdrawn EP0380498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8702867 1987-07-14
SE8702867A SE458096B (sv) 1987-07-14 1987-07-14 Saagklingepar

Publications (1)

Publication Number Publication Date
EP0380498A1 true EP0380498A1 (fr) 1990-08-08

Family

ID=20369126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880906833 Withdrawn EP0380498A1 (fr) 1987-07-14 1988-07-14 Lames de scie contrarotatives

Country Status (4)

Country Link
EP (1) EP0380498A1 (fr)
AU (1) AU2120588A (fr)
SE (1) SE458096B (fr)
WO (1) WO1989000474A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE505345C2 (sv) * 1994-11-01 1997-08-11 Sven Runo Vilhelm Gebelius Sågklinga
AU703038B2 (en) 1995-10-12 1999-03-11 Gebelius, Hjordis Florence Maria Method to prevent or reduce formation of magnetism in two adjacently located saw blades rotating in opposed directions, and a device for utilization of the method
SE524100C2 (sv) * 2001-05-16 2004-06-29 Nord Ct I Kalmar Ab Navanordning
SE528019C2 (sv) * 2004-12-02 2006-08-08 Indocean Diamond Tools Bermuda Sågblad och förfarande för tillverkning av ett sågblad
WO2008057027A1 (fr) * 2006-11-09 2008-05-15 Twinblade Technologies Holding Sweden Ab Paire de lames de scie
CN102615351A (zh) * 2012-04-06 2012-08-01 苏州天健旋切技术有限公司 一种旋转对切锯片的制造结构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US963520A (en) * 1909-07-14 1910-07-05 John W Costello Saw.
US2555428A (en) * 1948-06-07 1951-06-05 George A Tuttle Power-driven pruning saw
SE451683B (sv) * 1985-04-02 1987-10-26 Sven Runo Vilhelm Gebelius Forfarande vid sagning samt anordning for genomforande av forfarandet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8900474A1 *

Also Published As

Publication number Publication date
SE458096B (sv) 1989-02-27
SE8702867D0 (sv) 1987-07-14
AU2120588A (en) 1989-02-13
WO1989000474A1 (fr) 1989-01-26
SE8702867L (sv) 1989-01-15

Similar Documents

Publication Publication Date Title
CA2084013C (fr) Dent pour scie circulaire
AU2013205655B2 (en) Stump Cutting Apparatus
JP2529499B2 (ja) 切削インサ―ト
JP4855570B2 (ja) 切削工具
KR860000146B1 (ko) 원형톱날
JP4797292B2 (ja) スローアウェイ式エンドミルおよび切刃チップ
US20150136276A1 (en) Stump cutting apparatus
EP0319499A1 (fr) Machine à écorcer à anneau pour troncs d'arbres
DE69916258D1 (de) Schneidwerkzeug zum herstellen verzahnter werkstücke
WO2001068298A1 (fr) Ensemble outil de coupe
EP0380498A1 (fr) Lames de scie contrarotatives
US10219451B2 (en) Rotary stump cutting wheel
JPH08500300A (ja) 改良フライスインサート
KR20060012267A (ko) 구동벨트 커터 어셈블리
CA1286954C (fr) Lame circulaire de scie
JPH068030A (ja) 交換可能な超硬金属切削インサート
US20020194974A1 (en) Circular saw blade for cutting ferrous materials
EP2896290B1 (fr) Appareil de découpe de souche
JP3188027B2 (ja) 回転鉋
US10945385B2 (en) Stump cutter tooth
JPH0642429Y2 (ja) ハンマーナイフ
US7140407B2 (en) Configurations and designs for stump grinding teeth and corresponding holding brackets
JPS59162002A (ja) 丸刃
JPS6317606Y2 (fr)
JP3648503B2 (ja) 切断工具

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19900110

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 19911210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930202