EP1078706A2 - Sägeblatt mit abgeschrägten Schneidzähnen - Google Patents
Sägeblatt mit abgeschrägten Schneidzähnen Download PDFInfo
- Publication number
- EP1078706A2 EP1078706A2 EP00810637A EP00810637A EP1078706A2 EP 1078706 A2 EP1078706 A2 EP 1078706A2 EP 00810637 A EP00810637 A EP 00810637A EP 00810637 A EP00810637 A EP 00810637A EP 1078706 A2 EP1078706 A2 EP 1078706A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- saw blade
- cutting
- cutting teeth
- teeth
- tooth
- 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.)
- Granted
Links
Images
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.
- Saw blades especially circular saw blades, for professional use consist of a steel base blade with carbide cutting teeth soldered to it.
- the separate cutting teeth have the advantage that their properties and their shape largely independent of the master sheet to the requirements of Saw blade can be matched.
- Wear types an opposite role.
- the suitability of the saw blade also plays a role, being able to cut metallic residues, such as nails, plays a major role.
- hard and sudden load is rather one ductile carbide grade to choose to reduce the risk of cutting teeth breaking to reduce.
- Different cutting teeth for saw blades are known, which are characterized by different Grindings and the associated rake and clearance angles to the given requirements are adjusted.
- circular saw blades are known which cut very pointed blades have a large rake angle and allow a relatively easy cut. Due to the small wedge angle at the tips of the cutting teeth, they are used Cutting teeth very quickly and become blunt.
- Circular saw blades their cutting teeth have a relatively large wedge angle, with comparable cutting performance to an increased power consumption in the sawing device.
- a quick one The cutting teeth can become dull by using harder carbide grades be counteracted.
- a disadvantage of the harder carbide grades, however, is that they are at high risk of breakage.
- the friction of the saw blade in the kerf also plays a major role. So that in Operation occurring friction can be kept low, the cutting teeth are on the side and sharpened on the back of the tooth.
- the relief grinding creates a clearance angle, which reduces the wedge angle of the cutting teeth. If the cutting teeth dull as a result of operation, the clearance angle also decreases. This gradual Deterioration of the cutting teeth of the saw blade then essentially leads to otherwise same cutting parameters for greater power consumption of the sawing device. In addition, the cut quality also deteriorates.
- the saw blades known from the prior art are formed, for example, with mutually chamfered cutting teeth.
- Circular saw blades with such alternate teeth usually cause very small cutting forces.
- the tips of the alternate teeth are exposed to high loads and are very heavy sensitive to breakage.
- the cutting teeth are as Flat teeth with an almost trapezoidal shape.
- the trapezoidal shape of the Cutting teeth have the disadvantage of high cutting forces because the teeth essentially cut across their entire width.
- the slightly flattened cutting corners are no longer as vulnerable to breakage.
- the removed chips cannot move sideways, but remain in the cutting gap.
- the cutting forces with the Time is getting bigger. This results in an increased power consumption of the sawing device and in a slower cutting progress.
- the cutting teeth are heavily worn out relatively quickly, and the clearance angle behind the tooth tips is largely lost. This increases the friction of the saw blade in the kerf and the power consumption of the sawing device increases even further.
- Saw blades are also known in which the cutting teeth are flat teeth are trained, which are mutually slightly chamfered.
- the mutual chamfer causes a mutual division of the cut. Because of the small chamfer, they are Corners of the cutting teeth are less prone to breakage.
- On the individual Cutting teeth only exert lateral forces on one side, since they are completely in the shade of the previous cutting tooth works. The side forces the Cutting tooth deflected in the direction of the chamfer, and there are unclean cuts generated.
- 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 are taken into account.
- the Saw blade should offer good sawing progress with consistently good cutting quality and have low wear.
- the power requirement for achieving one sufficiently large sawing progress should be kept low. Thereby the Obtain suitability for the critical main applications occurring in construction stay.
- the invention provides a saw blade, in particular a circular saw blade, created with a steel blade, which with facilities for mounting on a sawing device, for example a hand-held circular saw, Is provided.
- a saw blade in particular a circular saw blade, created with a steel blade, which with facilities for mounting on a sawing device, for example a hand-held circular saw, Is provided.
- the beveled cutting area has an extension extending transversely to the saw blade, which is greater than the transverse extension of the flattened section.
- the saw blade designed according to the invention combines the advantages of the alternating tooth with those of the flat tooth and avoids their disadvantages.
- the cutting corners are largely insensitive to breakage. Due to the greater extent of the beveled Cutting area there is an overlap with successive alternate teeth of the bevel. As a result, forces act on both sides of the Cutting tooth and stabilize the cut. Because the cutting tooth does not cover the entire Machining the transverse extension, there is enough space available for the chips which they are led away. This results in cutting forces that are as low as in Saw blades with pure alternate teeth, but the cutting teeth are wide subject to less wear. The clearance angle of the cutting teeth is preserved.
- the angle of inclination of the beveled cutting area compared to the flattened Section is advantageously about 5 ° to about 40 °, preferably 10 ° to 20 °. This will enough space for the chips to be removed.
- the Cutting teeth advantageously have a substantially trapezoidal cross section.
- each cutting tooth expediently has a notch reaching into the base sheet upstream, which runs essentially radially with a circular saw blade and in Direction of rotation leads the cutting tooth.
- the one adjoining the saw tooth is Saw blade backs are designed with a corrugated circumferential contour.
- the selected circumferential contour of the back of the saw blade is particularly stable during operation Ratios.
- the saw blade shown in FIG. 1 is provided with the reference number 1 as a whole.
- the exemplary embodiment shown is a circular saw blade, for example for a circular saw.
- the circular saw blade 1 consists of a master blade 2 made of steel, which is provided with an axial bore 3, which makes it possible To mount circular saw blade 1 on a sawing device, for example a hand-held circular saw.
- Cutting teeth 4 are mounted on the circumference of the master sheet 2, for example soldered on, which are preferably made of a hard metal.
- the cutting teeth 4 are attached to support portions 5 of the base sheet 2, which are separated from each other by approximately radial running notches 6 are separated.
- the cutting teeth 4 have a toothed face 12 which faces the notch 6 and are supported with their Foot parts in the recesses 8 radially and with that facing away from the tooth face 12 Back surface 13 in the circumferential direction from the master sheet 2.
- the cutting teeth 4 each have a flattened section 10 and a beveled cutting area 11, the axial arrangement of which alternates with successive cutting teeth 4.
- the subsequent cutting tooth is indicated by dashed lines.
- the beveled cutting area 11 has a transverse extent b, which is greater than the width f of the flattened section 10 of the Cutting tooth.
- the transverse extent b of the beveled cutting area 11 about 55% to about 85%, preferably about 2/3 of the total width t of a cutting tooth 4.
- forces F act on both sides of each cutting tooth 4 in use Stabilize the cut.
- the inclination of the beveled cutting area 11 of a cutting tooth 4 with respect to its flattened section 10 is denoted by the angle a and is preferably about 5 ° to about 40 °, preferably 10 ° to 20 °, in particular about 15 °.
- the plan view of two successive cutting teeth 4 in FIG. 4 is more trapezoidal Cross section visible.
- the illustration also shows that the Cutting teeth 4 protrude laterally from the master blade 2.
- the alternating arrangement of the beveled cutting area 11 and the flattened section 10 is clearly visible.
- the support of the rear surface facing away from the tooth face 12 can also be seen 13 of the cutting teeth 4 on the master blade 2, which is very advantageous on the tool life of the saw blade.
Abstract
Description
- Fig. 1
- eine Seitenansicht eines erfindungsgemässen Sägeblatts, insbesondere eines Kreissägeblatts;
- Fig. 2
- eine Seitenansicht zweier aufeinanderfolgender, am Stammblatt montierter Schneidzähne;
- Fig. 3
- eine Ansicht zweier aufeinanderfolgender Schneidzähne gemäss Pfeil III in Fig. 2; und
- Fig. 4
- eine Draufsicht auf zwei aufeinanderfolgende Schneidzähne.
Claims (6)
- Sägeblatt, insbesondere Kreissägeblatt, mit einem vorzugsweise aus Stahl bestehenden Stammblatt (2), das mit Einrichtungen (3) zur Montage an einer Sägevorrichtung, insbesondere einer Handkreissäge, ausgestattet ist, und am Umfang montierte, vorzugsweise angelötete, Schneidzähne (4) aus einem Hartmetall aufweist, die jeweils einen quer zur Längserstreckung bzw. zum Durchmesser des Sägeblatts (1) verlaufenden, abgeflachten Abschnitt (10) und einen daran anschliessenden, abgeschrägten Schneidbereich (11) aufweisen, der bei aufeinanderfolgenden Schneidzähnen (4) wechselseitig angeordnet ist, dadurch gekennzeichnet, dass der abgeschrägte Schneidbereich (11) eine quer zum Sägeblatt verlaufende Erstreckung (b) aufweist, die grösser ist als die Quererstreckung (f) des abgeflachten Abschnitts (10).
- Sägeblatt nach Anspruch 1, dadurch gekennzeichnet, dass die quer zum Sägeblatt (1) verlaufende Erstreckung (b) des abgeschrägten Schneidbereichs (11) etwa 55% bis etwa 85%, vorzugsweise etwa 2/3, der grössten Gesamtbreite (t) des Schneidzahns (4) beträgt.
- Sägeblatt nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der abgeschrägte Schneidbereich (11) gegenüber dem abgeflachten Abschnitt (10) um einen Winkel (α) von etwa 5° bis etwa 40°, vorzugsweise 10° bis 20° geneigt ist.
- Sägeblatt nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Schneidzähne (4) einen im wesentlichen trapezförmigen Querschnitt aufweisen.
- Sägeblatt nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass jedem Schneidzahn (4) eine in das Stammblatt (2) reichende Kerbe (6) vorgelagert ist, die bei einem Kreissägeblatt (1) im wesentlichen radial verläuft und in Umdrehungsrichtung (R) dem Schneidzahn (4) vorauseilt.
- Sägeblatt nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der an jeden Schneidzahn (4) anschliessende Sägeblattrücken (9) eine gewellte Umfangskontur aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19940177 | 1999-08-26 | ||
DE19940177A DE19940177A1 (de) | 1999-08-26 | 1999-08-26 | Sägeblatt |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1078706A2 true EP1078706A2 (de) | 2001-02-28 |
EP1078706A3 EP1078706A3 (de) | 2003-06-11 |
EP1078706B1 EP1078706B1 (de) | 2005-01-19 |
Family
ID=7919469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00810637A Expired - Lifetime EP1078706B1 (de) | 1999-08-26 | 2000-07-18 | Sägeblatt mit abgeschrägten Schneidzähnen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1078706B1 (de) |
JP (1) | JP4842425B2 (de) |
DE (2) | DE19940177A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140023447A1 (en) * | 2012-07-18 | 2014-01-23 | 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 |
US10730119B2 (en) | 2017-01-06 | 2020-08-04 | Milwaukee Electric Tool Corporation | Hole saw |
USD965653S1 (en) | 2017-08-15 | 2022-10-04 | Milwaukee Electric Tool Corporation | Hole saw |
EP4101611A1 (de) * | 2017-05-16 | 2022-12-14 | Milwaukee Electric Tool Corporation | Sägeblatt |
Families Citing this family (1)
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 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE499862A (de) * | ||||
DE1628875A1 (de) * | 1967-05-18 | 1971-04-15 | Herbertz & Schmidt | Kreissaegeblatt mit hartmetallbestueckten Zaehnen fuer Holz und Kunststoff |
WO1996021545A1 (fr) * | 1995-01-13 | 1996-07-18 | Kanefusa Corporation | Scie circulaire a faible bruit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
-
1999
- 1999-08-26 DE DE19940177A patent/DE19940177A1/de not_active Withdrawn
-
2000
- 2000-07-18 EP EP00810637A patent/EP1078706B1/de not_active Expired - Lifetime
- 2000-07-18 DE DE50009260T patent/DE50009260D1/de not_active Expired - Lifetime
- 2000-08-25 JP JP2000255322A patent/JP4842425B2/ja not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE499862A (de) * | ||||
DE1628875A1 (de) * | 1967-05-18 | 1971-04-15 | Herbertz & Schmidt | Kreissaegeblatt mit hartmetallbestueckten Zaehnen fuer Holz und Kunststoff |
WO1996021545A1 (fr) * | 1995-01-13 | 1996-07-18 | Kanefusa Corporation | Scie circulaire a faible bruit |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140023447A1 (en) * | 2012-07-18 | 2014-01-23 | Milwaukee Electric Tool Corporation | Toothform for a cutting tool, such as a hole saw |
US9751134B2 (en) * | 2012-07-18 | 2017-09-05 | Milwaukee Electric Tool Corporation | Toothform for a cutting tool, such as a hole saw |
US10092963B2 (en) | 2012-07-18 | 2018-10-09 | Milwaukee Electric Tool Corporation | Toothform for a cutting tool, such as a hole saw |
US10569345B2 (en) | 2012-07-18 | 2020-02-25 | 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 |
US11154940B2 (en) | 2016-09-23 | 2021-10-26 | Milwaukee Electric Tool Corporation | Hole saw arbor assembly |
US10730119B2 (en) | 2017-01-06 | 2020-08-04 | Milwaukee Electric Tool Corporation | Hole saw |
US11559840B2 (en) | 2017-01-06 | 2023-01-24 | Milwaukee Electric Tool Corporation | Hole saw |
EP4101611A1 (de) * | 2017-05-16 | 2022-12-14 | Milwaukee Electric Tool Corporation | Sägeblatt |
USD965653S1 (en) | 2017-08-15 | 2022-10-04 | Milwaukee Electric Tool Corporation | Hole saw |
USD973733S1 (en) | 2017-08-15 | 2022-12-27 | Milwaukee Electric Tool Corporation | Hole saw |
Also Published As
Publication number | Publication date |
---|---|
DE19940177A1 (de) | 2001-03-01 |
JP4842425B2 (ja) | 2011-12-21 |
EP1078706B1 (de) | 2005-01-19 |
EP1078706A3 (de) | 2003-06-11 |
DE50009260D1 (de) | 2005-02-24 |
JP2001087944A (ja) | 2001-04-03 |
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