WO2012121661A9 - Lame de scie annulaire dotée d'au moins un évidement disposé pour relâcher les contraintes - Google Patents

Lame de scie annulaire dotée d'au moins un évidement disposé pour relâcher les contraintes Download PDF

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Publication number
WO2012121661A9
WO2012121661A9 PCT/SE2012/050266 SE2012050266W WO2012121661A9 WO 2012121661 A9 WO2012121661 A9 WO 2012121661A9 SE 2012050266 W SE2012050266 W SE 2012050266W WO 2012121661 A9 WO2012121661 A9 WO 2012121661A9
Authority
WO
WIPO (PCT)
Prior art keywords
recesses
saw blade
annular
annular saw
blade according
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/SE2012/050266
Other languages
English (en)
Other versions
WO2012121661A1 (fr
Inventor
Mats Johansson
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.)
GMJ Globe Invent AB
JOHANSSON Christina
JOHANSSON Maria
JOHNSON Helena
Original Assignee
GMJ Globe Invent AB
JOHANSSON Christina
JOHANSSON Maria
JOHNSON Helena
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
Priority claimed from SE1150209A external-priority patent/SE1150209A1/sv
Application filed by GMJ Globe Invent AB, JOHANSSON Christina, JOHANSSON Maria, JOHNSON Helena filed Critical GMJ Globe Invent AB
Publication of WO2012121661A1 publication Critical patent/WO2012121661A1/fr
Publication of WO2012121661A9 publication Critical patent/WO2012121661A9/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
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
    • B23D47/123—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades acting on the disc of the saw blade
    • 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
    • B27B5/14—Rim-driven circular saws

Definitions

  • the present invention relates to an annular saw blade comprising an annular body having cutter means arranged at its outer periphery, which body has a radial extension that considerably exceeds the thickness and is provided with from each other facing side surfaces, comprising an annular drive area having at least one drive face arranged to transfer a driving power from two opposing driving rollers, or one driving roller with an opposing counterforce roller, said rollers being arranged with their axes of rotation in the radial direction to bear against both side surfaces.
  • Annular saw blades are characterized by having no centre part, whereby the saw depth gets greater than the circle radius. Examples of fields of use is within fire defense for sawing roofs, walls and floors irrespective of the occurrence of nails or other iron objects, sawing car bodies and other steel sheet and iron constructions; sawing concrete pipes, sawing asphalt, making holes in walls of concrete and lightweight concrete, etc.
  • a first category of annular saw devices in which the annular saw blade is supported by a centre disc that is attached to a blade holding fixture in the saw machine is known from SE 8002265-0 and US 2,972,363. This design gives some additional costs which is the main reason for the development of alternative annular saw machines without centre disc.
  • Other prior art annular saw devices are presented in US 3, 135,304, US 3,930,310 and US 2,972,363.
  • Another prior art category of annular saw machines is adapted to suspend the annular saw blade without a centre support.
  • a present day variant is shown in US2009/0229133.
  • the driving rollers sometimes just one driving roller and one counterforce roller
  • This high pressure especially in combination with the heat release that takes place in connection with sawing, gives a rolling action resulting in stresses being formed in the blade. In time, such stresses can be built up to undesirable levels resulting in the risk of blade breaking which in turn means large damage risks.
  • said recesses comprise at least one inner group and one outer group, where the outer recesses preferably have a larger maximum dimension than the maximum dimension of the inner recesses,
  • a guiding groove is arranged between said inner and outer groups
  • the recesses have a longitudinal extension that is arranged to contribute to liquid transport
  • the longitudinal extension is directed such that an acute angle is formed to the radius of the blade
  • the major part of the recesses preferably all of them, are through recesses.
  • Fig. 1 shows a portion of an annular saw blade according to the invention, as seen from a first side thereof and with a driving roller being schematically indicated,
  • Fig. 2 shows the blade in a planar view as seen from the inside, with the driving rollers schematically indicated
  • Fig. 3 shows the blade as seen from a second side
  • Fig. 4 shows a cross-section of the blade, with the driving rollers * schematically indicated, and
  • Fig. 5 shows a cross-section of the blade according to an alternative embodiment, with the driving rollers or guiding rollers schematically indicated.
  • Figs. 1 and 2 show a portion of an annular saw blade 1 according to a preferred embodiment of the invention, as seen in profile.
  • the annular cutting blade 1 has an annular body 2 with a radial extension of ca 5-15% of the diameter of the blade.
  • the body 2 is provided with cutting members 3, usually diamond cutters, at its outer periphery 25, resulting in an increase of the total radial dimension L of body 2 including cutters 3.
  • Recesses 4, 5 are arranged in the body 2 with the purpose of relieving stresses that form as the driving means 40, 50 in the form of radially directed driving counteracting rollers affect the blade 1 to rotate.
  • the body 2 is of uniform thickness in the axial direction, which thickness T is considerably smaller than the radial extension 1 of the body 2, and has essentially parallel side surfaces 20, 21 facing away from each other.
  • a guiding groove 23 is arranged in one of the faces 20 and intended to interact with a maneuvering cam 45 on one of the driving rollers 40.
  • the driving rollers 40, 50 have a radial extension l b that is smaller than the total radial extension 1 of the annular body 2.
  • the entire envelope surface of the driving rollers 40, 50 bears against the body 2 within an area 22 that is denoted a driving area. Accordingly, this driving area is constituted of equally sized part side surfaces 22 A, 22B on both sides 20, 21.
  • a relatively large clamping force must be exerted when driving the blade 1.
  • These clamping forces affect the material of the body, which usually is some type of high-strength steel, such that stresses are formed, which in time results in some material dislocation. Thanks to the recesses 4, 5 there is room to allow for some dislocation of the material, whereby large inner stresses are prevented from building up inside the body 2.
  • Fig. 3 shows a view from the other side of the blade 1, having a drive face 22B without a guiding groove. It is clear from the drawing that the recesses 4, 5 suitably are positioned in different groups, suitably an inner group 4 and an outer group 5 respectively (there may however be more groups), where an outer group 5
  • the inner and outer groups 4, 5 suitably are positioned such that they are staggered in relation to each other, preferably with the same spacing ⁇ , which means that the inner recesses 4 preferably are positioned about midways between two outer recesses 5. It is also shown that the recesses 4, 5 suitably are positioned such that they do not extend to the area of the driving groove 23, i.e. such that the outer end of an inner recess 4 ends some distance before the inner edge of the guiding groove 23 and the inner end of an outer recess 5 ends just beyond the outer edge of the guiding groove 23.
  • the outer recesses 5 have such an extension that their outer ends are positioned in the vicinity of the outer end area of the driving zone 22 and the inner recesses 4 such that their inner end is positioned in the vicinity of the inner end zone of the driving area 22.
  • the extension of the recesses 4, 5 can advantageously be made such that liquid transport is optimized in terms of feed to the saw cut, which includes a large variety of embodiments, such as giving them an angle a to the radius of the blade, whereby the blade 1 rotation may result in a positive pumping liquid feed effect.
  • the recesses 4, 5 are arranged with a longitudinal extension x, y in the range of 4-40% x 1, and a transverse extension in the range of 4-20% x 1, having corner radiuses in the range of 0.1-4 mm, and preferably x > y, more preferably x > y, and even more preferred x > 1.5y. Furthermore, all too sharp radiuses should be avoided in the recesses 4, 5, which preferably are constituted by through recesses, and it is preferred that radiuses of less than 0.5 mm are not employed, whereby the radiuses more preferably are 1-5 mm.
  • Fig. 5 shows yet another embodiment according to the invention, in which a circular groove 7 is used instead of the recesses 4, 5 with the purpose of rearranging stresses in the body 2 being transferred via the rollers 40, 50.
  • the groove 7 suitably has about the same dimensions as the guiding groove 23.
  • the groove 7 has a depth t that is at least 30% of the thickness tof the blade body 2. More preferred, the groove 7 has a depth t in the range of 40-90% of the body thickness, more preferred 50-80%.
  • the depth of the relieving groove 7 is suitably equal to the depth of the guiding groove 23, preferably having a deviation of ⁇ 20% at the most.
  • the invention is not limited to the above described but can be varied within the scope of the claims. It is for example obvious to the person skilled in the art that the recesses 4, 5 can be of very varying design in order to fulfill the function of enabling relief. It is also realized that the recesses 4, 5 can extend in the form of bends, in order e.g. to give an even better pumping effect. It is furthermore realized that various variants of combinations of relieving grooves 7 and recesses 4, 5 can be used, whereby for example a plurality of relieving grooves 7 can be used with or without recesses, and also that a relieving groove 7 can be combined with one or more groups of recesses.
  • the recesses can be made in a number of traditional ways but preferably laser cutting or some other present day technique is used which results in very fine cutting surfaces, as it is an advantage that these are without scratches or notches that otherwise may give a weakening effect. It is also realized that round/circular recesses can be used instead of elongated recesses, which recesses can be of varying size, whereby it is possible to produce extremely small and fine holes by laser cutting such that a type of perforation is formed instead.

Landscapes

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

Abstract

La présente invention concerne une lame de scie annulaire comprenant un corps annulaire (2) possédant un moyen de coupe (3) disposé à sa périphérie externe, lequel corps (2) a une extension radiale (1) qui dépasse considérablement l'épaisseur en (T) et est pourvu de surfaces latérales (20, 21) faisant face l'une à l'autre, comprenant une zone d'entraînement annulaire (22) ayant au moins une face d'entraînement (22A, 22B) disposée pour transférer une puissance d'entraînement de deux galets d'entraînement opposés (40, 50), ou d'un galet d'entraînement avec un galet de contre-force opposé (50), lesdits galets (40, 50) étant disposés avec leurs axes de rotation dans la direction radiale s'appuyant contre les deux surfaces latérales (20, 21), ledit corps (2) étant pourvu d'évidements (4, 5) disposés pour relâcher les contraintes dans le corps (2), communiquées par l'intermédiaire desdits galets (40, 50).
PCT/SE2012/050266 2011-03-09 2012-03-09 Lame de scie annulaire dotée d'au moins un évidement disposé pour relâcher les contraintes Ceased WO2012121661A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE1150209A SE1150209A1 (sv) 2011-03-09 2011-03-09 Ringsågklinga och metod vid dess användning
SE1150209-3 2011-03-09
SE1150499 2011-05-30
SE1150499-0 2011-05-30

Publications (2)

Publication Number Publication Date
WO2012121661A1 WO2012121661A1 (fr) 2012-09-13
WO2012121661A9 true WO2012121661A9 (fr) 2012-11-01

Family

ID=46798453

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2012/050266 Ceased WO2012121661A1 (fr) 2011-03-09 2012-03-09 Lame de scie annulaire dotée d'au moins un évidement disposé pour relâcher les contraintes

Country Status (1)

Country Link
WO (1) WO2012121661A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105382334A (zh) * 2015-12-28 2016-03-09 重庆安特管业有限公司 缠绕机切割机构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH363148A (it) * 1957-05-09 1962-07-15 Ruggero Santilli Apparecchio comprendente una sega circolare
US3135304A (en) * 1959-09-14 1964-06-02 Mcculloch Corp Roto saw
US3930310A (en) * 1970-12-11 1976-01-06 Ermanno Santilli Stable power ring tool
DE2703825A1 (de) * 1977-01-31 1978-08-03 Felde Richard Fa Kreissaegeblatt
SE8002265L (sv) * 1980-03-25 1981-09-26 Johansson Mats A Sammansatt sagklinga av centerlesstyp samt sagmaskin for en sadan sagklinga
US5182976A (en) * 1983-09-09 1993-02-02 The Peerless Saw Company Spring beamed shock absorbing circular saw blade body
US5369886A (en) * 1994-01-14 1994-12-06 Gallatin; Charles A. Portable annular blade power saw
FR2859931B3 (fr) * 2003-09-18 2005-08-12 Parlid Services Ltd Lame en forme de disque pour scie circulaire, avec des fentes pour reduire la vibration
US20090229133A1 (en) * 2008-03-14 2009-09-17 Stephane Campeau Centerless saw device

Also Published As

Publication number Publication date
WO2012121661A1 (fr) 2012-09-13

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