EP1078706B1 - Lame de scie à dents chanfreinées - Google Patents

Lame de scie à dents chanfreinées Download PDF

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Publication number
EP1078706B1
EP1078706B1 EP00810637A EP00810637A EP1078706B1 EP 1078706 B1 EP1078706 B1 EP 1078706B1 EP 00810637 A EP00810637 A EP 00810637A EP 00810637 A EP00810637 A EP 00810637A EP 1078706 B1 EP1078706 B1 EP 1078706B1
Authority
EP
European Patent Office
Prior art keywords
saw blade
cutting
cutting teeth
teeth
extension
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
EP00810637A
Other languages
German (de)
English (en)
Other versions
EP1078706A3 (fr
EP1078706A2 (fr
Inventor
Michael Fey
Christoph Lohr
Andreas Kisselbach
Günter Walliser
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1078706A2 publication Critical patent/EP1078706A2/fr
Publication of EP1078706A3 publication Critical patent/EP1078706A3/fr
Application granted granted Critical
Publication of EP1078706B1 publication Critical patent/EP1078706B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B23D61/02—Circular saw blades
    • B23D61/021—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet

Definitions

  • the invention relates to a saw blade, in particular a circular saw blade, according to the Preamble of claim 1 (see also WO 96/21545).
  • Saw blades in particular circular saw blades, for professional use consist of a steel blade and soldered cutting teeth made of a carbide.
  • the separate cutting teeth have the advantage that their properties and their design largely independent of the master sheet on the requirements of Saw blade can be adjusted.
  • two critical play Wear types an opposite role.
  • the cutting teeth are laterally and behind the back of the teeth.
  • the back-grinding creates a clearance angle, which reduces the wedge angle of the cutting teeth.
  • the cutting teeth Dull as a result of operation, also reduces the clearance angle.
  • This gradual Deterioration of the cutting teeth of the saw blade then results in otherwise substantially same cutting parameters to a greater power consumption of the sawing device.
  • the quality of cut deteriorates.
  • the saw blades known from the prior art are formed for example with mutually chamfered cutting teeth.
  • circular saw blades With such change teeth usually cause very small cutting forces.
  • the tips of the alternating teeth are exposed to high loads and are very fragile.
  • the cutting teeth are as Flat teeth formed with approximately trapezoidal shape.
  • the trapezoidal shape of Cutting teeth has the disadvantage of high cutting forces, as the teeth substantially cut across its entire width.
  • the slightly flattened cutting corners are no longer so vulnerable to breakage.
  • the mined chips can not escape laterally, but remain in the kerf.
  • the cutting forces with the Time always bigger. This has an effect on increased power consumption of the sawing device and in a slow cutting progress.
  • the cutting teeth are worn relatively quickly, and the clearance angle behind the tips of the teeth is largely lost. This increases the friction of the saw blade in the kerf and the power consumption of the saw increases even further.
  • WO 96/21545 shows several sets of cutting teeth for circular saw blades. Show the sets inter alia pairs of identical cutting teeth with a bevelled Cutting area and a flattened portion, the successive mutually are arranged. In addition, more cutting teeth are provided in each set, which are in differ in their shape from the couple. By the successive arrangement at least six differently shaped cutting teeth noise reduction is to be achieved.
  • the object of the present invention is to provide a saw blade, in particular a circular saw blade, to improve that the disadvantages of the known saw blades remedied and the different requirements in use.
  • the Saw blade should provide good sawing progress while maintaining good cut quality and have a low wear.
  • the power needed to achieve a sufficiently large sawing progress should be kept low. It should be the Suitability for the major critical applications in construction stay.
  • a saw blade in particular by the invention a circular saw blade, created with a steel blade, with facilities for mounting on a sawing device, for example a circular saw, Is provided.
  • a sawing device for example a circular saw
  • On the circumference of the stem blade are cutting teeth made of a hard metal mounted, for example, soldered, each one transverse to the longitudinal extent or to the diameter of the saw blade extending, flattened portion and a thereto subsequent, beveled cutting area, which in successive Cutting teeth is mutually arranged.
  • the bevelled cutting area has a transverse to the blade extension, which is greater than the transverse extent the flattened section.
  • the chamfered cutting area is opposite to the flattened portion by one Angle tilted from 10 ° to 20 °.
  • the saw blade formed according to the invention combines the advantages of the change tooth those of the flat tooth and avoids their disadvantages.
  • the cutting corners are largely unbreakable. Due to the greater extent of the bevelled Cutting area occurs at successive alternating teeth to cover the tooth slopes. As a result, forces act on both sides during use Cutting tooth and stabilize the cut. Because the cutting tooth does not over the entire Spacing transverse extension, there is enough room for the chips to pass through they are removed. This results in cutting forces that are similar to those at Saw blades with pure alternating teeth, but the cutting teeth are a far subjected to less wear. The clearance angle of the cutting teeth is retained.
  • the Cutting teeth with advantage a substantially trapezoidal cross section.
  • each cutting tooth a reaching into the master blade notch upstream, which extends in a circular saw blade substantially radially and in Direction of rotation leads the cutting tooth.
  • the subsequent to the sawtooth Saw blade back formed with a corrugated circumferential contour.
  • the selected circumferential contour of the blade backrest is particularly stable during operation Relationships.
  • the saw blade shown in Fig. 1 is provided overall with the reference numeral 1.
  • the circular saw blade 1 is a circular saw blade, for example, for a circular saw.
  • the circular saw blade 1 consists of a master sheet 2 made of steel, which is provided with an axial bore 3, which allows the Circular saw blade 1 to be mounted on a sawing device, such as a circular saw.
  • On the circumference of the stem blade 2 cutting teeth 4 are mounted, for example, soldered, which are preferably made of a hard metal.
  • the cutting teeth 4 are attached to support portions 5 of the stem blade 2, which are separated from each other by approximately radially extending notches 6 are separated. For the attachment of the cutting teeth 4 are on the in the direction of rotation R of the circular saw blade 1 trailing boundary surfaces.
  • FIGS. 2-4 two consecutive cutting teeth 4 are shown, each in the recesses 8 in relation to the direction of rotation of the saw blade in operation trailing boundary surfaces 7 of the notches 6 are mounted.
  • the cutting teeth 4 have a tooth face 12, which faces the notch 6 and are based with their Foot parts in the recesses 8 radially and facing away from the tooth face 12 Rear surface 13 in the circumferential direction on the master sheet 2 from.
  • the cutting teeth 4 each have a flattened portion 10 and a beveled cutting area 11, whose axial arrangement alternates with successive cutting teeth 4.
  • the subsequent cutting tooth is indicated by dashed lines.
  • the beveled cutting region 11 is a transverse extension b, which is larger than the width f of the flattened portion 10 of the Cutting tooth.
  • the transverse extent b of the chamfered cutting area 11 about 55% to about 85%, preferably about 2/3 of the total width t of a cutting tooth 4.
  • it is characterized in successive Cutting teeth 4 to overlap the tapered cutting areas 11. As a result, acting on both sides forces F on each cutting tooth 4, the Stabilize the cut.
  • the inclination of the chamfered cutting area 11 of a cutting tooth 4 opposite its flattened portion 10 is designated by the angle ⁇ and is preferably about 5 ° to about 40 °, preferably 10 ° to 20 °, especially about 15 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Nonmetal Cutting Devices (AREA)

Claims (5)

  1. Lame de scie, en particulier lame de scie circulaire, avec une lame de base (2), de préférence en acier, qui est munie de moyens (3) pour son montage sur un dispositif de sciage, en particulier sur une scie circulaire portative, et qui comporte des dents coupantes (4) en métal dur, lesquelles sont rapportées, de préférence par brasage, en périphérie et comportent chacune une portion aplatie (10) s'étendant transversalement à l'extension longitudinale, respectivement au diamètre de la lame de scie (1), et une zone taillante chanfreinée (11) qui se raccorde à la précédente et qui, pour des dents coupantes successives (4), est disposée alternativement d'un côté à l'autre, la zone taillante chanfreinée (11) possédant, transversalement à la lame de scie, une extension (b) qui est supérieure à l'extension transversale (f) de la portion aplatie (10), caractérisée en ce que la zone taillante chanfreinée (11) est inclinée d'un angle (α) de 10° à 20° par rapport à la portion aplatie (10).
  2. Lame de scie selon la revendication 1, caractérisée en ce que l'extension (b), transversale à la lame de scie (1), de la zone taillante chanfreinée (11), correspond à environ 55 % à environ 85 %, de préférence à environ 2/3, de la largeur totale maximale (t) de la dent coupante (4),
  3. Lame de scie selon une des revendications précédentes, caractérisée en ce que les dents coupantes (4) présentent une section transversale sensiblement trapézoïdale.
  4. Lame de scie selon une des revendications précédentes, caractérisée en ce que devant chaque dent coupante (4) est ménagée une entaille (6) qui pénètre dans la lame de base (2) et qui, dans le cas d'une lame de scie circulaire (1), s'étend sensiblement radialement et précède la dent coupante (4) par rapport à la direction de rotation (R).
  5. Lame de scie selon une des revendications précédentes, caractérisée en ce que le dos de lame de scie (9) raccordé à chaque dent coupante (4) présente un contour circonférentiel ondulé.
EP00810637A 1999-08-26 2000-07-18 Lame de scie à dents chanfreinées Expired - Lifetime EP1078706B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19940177A DE19940177A1 (de) 1999-08-26 1999-08-26 Sägeblatt
DE19940177 1999-08-26

Publications (3)

Publication Number Publication Date
EP1078706A2 EP1078706A2 (fr) 2001-02-28
EP1078706A3 EP1078706A3 (fr) 2003-06-11
EP1078706B1 true EP1078706B1 (fr) 2005-01-19

Family

ID=7919469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00810637A Expired - Lifetime EP1078706B1 (fr) 1999-08-26 2000-07-18 Lame de scie à dents chanfreinées

Country Status (3)

Country Link
EP (1) EP1078706B1 (fr)
JP (1) JP4842425B2 (fr)
DE (2) DE19940177A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2566032C1 (ru) * 2014-06-09 2015-10-20 Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный лесотехнический университет имени Г.Ф. Морозова" Дисковая пила для обработки мягколиственной древесины

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9751134B2 (en) * 2012-07-18 2017-09-05 Milwaukee Electric Tool Corporation Toothform for a cutting tool, such as a hole saw
US20150239052A1 (en) * 2014-02-27 2015-08-27 Robert Bosch Tool Corporation Circular Saw Blade
US10532412B2 (en) 2016-09-23 2020-01-14 Milwaukee Electric Tool Corporation Hole saw arbor assembly
EP3354385B1 (fr) 2017-01-06 2020-05-27 Milwaukee Electric Tool Corporation Scie-cloche
WO2018213371A1 (fr) * 2017-05-16 2018-11-22 Milwaukee Electric Tool Corporation Lame de scie
USD973733S1 (en) 2017-08-15 2022-12-27 Milwaukee Electric Tool Corporation Hole saw

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE499862A (fr) *
DE1628875A1 (de) * 1967-05-18 1971-04-15 Herbertz & Schmidt Kreissaegeblatt mit hartmetallbestueckten Zaehnen fuer Holz und Kunststoff
JPS6099517A (ja) * 1983-11-02 1985-06-03 Daido Kogyo Kk サ−メツトソ−
JPH0322823A (ja) * 1989-06-16 1991-01-31 Toshiba Corp Ｃｖｃｆの投入電流抑制装置
JPH08187702A (ja) * 1995-01-13 1996-07-23 Kanefusa Kk 低騒音丸鋸
JPH10309701A (ja) * 1997-05-09 1998-11-24 Kanefusa Corp 丸 鋸
JPH10337611A (ja) * 1997-06-06 1998-12-22 Tenryu Seikiyo Kk チップ付き回転鋸

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2566032C1 (ru) * 2014-06-09 2015-10-20 Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный лесотехнический университет имени Г.Ф. Морозова" Дисковая пила для обработки мягколиственной древесины

Also Published As

Publication number Publication date
EP1078706A3 (fr) 2003-06-11
JP2001087944A (ja) 2001-04-03
EP1078706A2 (fr) 2001-02-28
JP4842425B2 (ja) 2011-12-21
DE50009260D1 (de) 2005-02-24
DE19940177A1 (de) 2001-03-01

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