EP1174207A1 - Trennscheibe mit Trägheitsausnehmungen - Google Patents
Trennscheibe mit Trägheitsausnehmungen Download PDFInfo
- Publication number
- EP1174207A1 EP1174207A1 EP01115411A EP01115411A EP1174207A1 EP 1174207 A1 EP1174207 A1 EP 1174207A1 EP 01115411 A EP01115411 A EP 01115411A EP 01115411 A EP01115411 A EP 01115411A EP 1174207 A1 EP1174207 A1 EP 1174207A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting disc
- recesses
- inertia
- cutting
- spokes
- 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
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/12—Saw-blades or saw-discs specially adapted for working stone
- B28D1/121—Circular saw blades
Definitions
- the invention relates to a cutting disc for processing, in particular for dry cutting of hard building materials such as stone, concrete, brick, sand-lime brick, masonry or the like, wherein the cutting disc has a diameter of at least 500 mm and a plurality of circumferentially arranged and spaced by spokes inertial receptacles, according to the preamble of claim 1.
- the present invention has for its object to provide the moment of inertia by recesses referred to as inertia recesses in an even more effective manner to reduce.
- a key idea of the present invention is to be found in the middle range between 40% and 60% of the radius of the cutting disc reduce weight by providing inertia recesses to effect, according to the knowledge gained in computer simulations
- the inertial recesses spaced apart by spokes are particularly large can be formed so that on at least one circumferential line in the range between 40% and 60% of the radius of the cutting disc is the ratio of the total width of all spokes on this circumference and total width of all inertia recesses on this circumferential line at least 1: 2, is preferably at least 1: 3, in particular 1: 4.
- Stability, safety and function of the saw blade is, as has emerged from the computer-aided test series, with this arrangement still adequately maintained.
- the reduction in the moment of inertia is such for manageability large cutting discs are crucial.
- the power of the drive motor can be adjusted accordingly dimension smaller.
- the inertial recesses are encircling Border limited, the peripheral edge having at least two curvature maxima. there are the first maximum curvature at the radially innermost point and the second maximum curvature arranged at the radially outermost point.
- the circumferential edge points between the maxima of curvature a curved course at least on one side, preferably on both sides on. At the radially innermost point, it must be taken into account that the radius of the maximum curvature is not dimensioned too small, since otherwise undesirable high material loads or even Cracks occur.
- the peripheral edge of the inertial recesses comprises three spatially separate curvature maxima, so that there is a shape reminiscent of a triangle.
- the inertial recesses are approximately kidney-shaped Layout. This course of the inertial recesses has with regard to weight reduction, The stability and vibration behavior of the cutting disc have proven to be particularly favorable.
- the spokes have a tapered area between the inertial recesses. It has shown that in the present embodiment tensions particularly in the vicinity of the radially innermost Point and the radially outermost point of the inertial recesses occur. In the area in between, which is connected by the spokes, a tapering of the spokes from stability and vibration considerations are tolerated.
- the cutting disc has a central clamping ring with a central one Clamping opening, with the central clamping ring extending to the radially innermost point Inertial recess extends, the radial ring width of the central clamping ring at most 25%, preferably at most 20% of the total radius of the cutting disc.
- the cutting disc has an outer ring zone that follows is delimited inside by the outermost point of the inertia recesses and in the outer area Has cutting means, said outer ring zone having a radial ring width of at most 18%, preferably of at most 16% of the total radius of the cutting disc.
- a particular aspect of the present invention is to be seen in that a particular hand-held cutting device for processing hard building materials such as stone, concrete, brick, Masonry or the like is equipped with a cutting disc according to the invention, so that the Processing is significantly facilitated due to the significantly reduced torque.
- the invention is also described below with regard to further features and advantages based on the description of exemplary embodiments and with reference to the accompanying drawings.
- Fig. 1 is a cutting disc 13 with eight inertia recesses 11 here, through eight spokes 12 are shown spaced from each other.
- the spokes 12 run between a central one Clamping ring 17, which has a central clamping opening 21 and an outer ring zone 18 which at its Outside with cutting means 22, such as diamond chips, etc., is occupied.
- Around the middle of the Spokes 12 each have a tapered area 16, so that on an imaginary circumferential circle 24 through this tapered area 16 and concentric to the central clamping opening 21 the ratio of the entire width of the spokes 12 and the entire width of the inertia recesses 11 in particular is small.
- the inertia recesses have in the embodiment shown here 11 has an approximately kidney-shaped shape, with a peripheral edge 14 overall defines three curvature maxima, namely an inner curvature maximum A, a lateral one Maximum curvature B and an outer maximum curvature C. All sections between these In the present embodiment, curvature maxima A, B, C each run as one Towards curved sections.
- curvature maxima A, B, C each run as one Towards curved sections.
- a preferred direction is defined so that the cutting disc in one direction 25 should be operated in which the outer maximum curvature C lies in front.
- the inner maximum curvature A is particularly critical because the radius of curvature is too small can cause. With a diameter of the cutting disc 13 of at least 500 mm, that should be innermost curvature maximum A have a radius of curvature of at least about 17 mm.
- FIG 2 is a sketchy diagram of the percentage weight reduction on a particular illustrated circumferential circle 24 dependent on the radius, the radial Structure of the cutting disc 13 is easy to understand. Within the innermost 25% of the radius, meaningfully no significant weight reduction compared to conventional cutting discs to reach. It should also be noted that there is a weight reduction here does not have as much longitudinal impact on the moment of inertia as in areas with a greater radial distance from the center of the central clamping opening 21.
- the cutting disc 13 continues to form the one with the cutting means 22 provided outer ring zone 18, so that practically no meaningful in this area Weight reduction is possible.
- inertial recesses 11 can be incorporated a considerable weight reduction, at certain radius positions over 80%.
- This reduction in weight is also carried out in the area of larger radii, the moment of inertia be significantly reduced.
- the Weight reduction based on an imaginary circumferential circle 24 initially reached and reached rapidly its maximum at an imaginary circumferential circle in the region of half the radius of the cutting disc. There the weight reduction is about 85%. With an imaginary circumferential radius with a larger one Radius the percentage of possible weight reduction steadily decreases again up to the radius, which is defined by the radially outermost point of the inertia recesses 11.
- Fig. 3 is still a hand-held cutting device for processing, especially for dry cutting of hard building materials such as stone, concrete, brick, sand-lime brick, masonry or The like shown that a cutting disc 13 partially accommodated in a protective housing 23 illustrated with inertial recesses 11 according to the invention.
- the protective housing 23 is at of the embodiment shown in a guide housing 19 and a protective hood 20, the are pivotally mounted relative to each other, so that the guide housing 19 in the rest position Cutting disc 13 completely covered.
- the protective hood 20 is in the guide housing 19 pivoted in that the cutting disc 13 in regions over the guide housing 19 emerges (see FIG. 3) and processing of building materials is made possible.
- Such a particularly hand-held cutting device with a cutting disc according to the invention will open up a wide range of applications.
- the change in building materials, especially in residential construction Solid construction demands more than ever sawing techniques when processing new buildings Bricks.
- the previously used striking machining methods such as hewing with masonry hammer, can no longer be used with today's bricks for a variety of reasons become.
- Also in the renovation or modernization of old buildings due to the static problems and possibly cracking the use of compressors with chisel tools or others hitting tools rather rejected. For this reason, construction professionals are becoming more and more the use of sawing techniques for the processing of building materials, especially brick and masonry favors.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Crushing And Pulverization Processes (AREA)
- Sawing (AREA)
Abstract
Description
- Fig. 1
- eine Ausführungsform einer erfindungsgemäßen Trennscheibe,
- Fig. 2
- ein Diagramm, das die pro Radius vorgenommene Gewichtsreduzierung bei einer Trennscheibe gemäß Fig. 1 veranschaulicht.
- Fig. 3
- eine Ausrührungsform eines handgeführten Schneidgerätes mit einer Trennscheibe nach Fig. 1.
- 11
- Trägheitsausnehmungen
- 12
- Speichen
- 13
- Trennscheibe
- 14
- Rand (der Trägheitsausnehmungen)
- 16
- verjüngter Bereich
- 17
- zentraler Spannring
- 18
- Außenringzone
- 19
- Führungsgehäuse
- 20
- Schutzhaube
- 21
- zentrale Spannöffnung
- 22
- Schneidmittel
- 23
- Schutzgehäuse
- 24
- gedachter Umfangskreis
- 25
- Drehrichtung
- A
- (inneres Krümmungsmaximum)
- B
- (seitliches Krümmungsmaximum)
- C
- (äußeres Krümmungsmaximum)
Claims (10)
- Trennscheibe für die Bearbeitung, insbesondere für das Trockenschneiden von harten Baumaterialien, wie Gestein, Beton, Ziegel, Kalksandstein, Mauerwerk oder dergleichen,
wobei die Trennscheibe (13) einen Durchmesser von mindestens 500 mm und eine Mehrzahl von in Umfangsrichtung angeordneter und durch Speichen (12) beabstandeter Trägheitsausnehmungen (11) aufweist,
dadurch gekennzeichnet, daß die Trägheitsausnehmungen (11) durch Speichen (12) voneinander beabstandet sind, wobei auf mindestens einer gedachten Umfangslinie bei einem bestimmten Radius im Bereich zwischen 40 % und 60 % des Radius der Trennscheibe das Verhältnis aus Gesamtbreite aller Speichen auf dieser Umfangslinie und Gesamtbreite aller Trägheitsausnehmungen auf dieser Umfangslinie mindestens 1:2, vorzugsweise mindestens 1:3, insbesondere mindestens 1:4 beträgt. - Trennscheibe nach Anspruch 1,
dadurch gekennzeichnet, daß die Speichen (12) einen zu Radialrichtung der Trennscheibe (13) gekrümmten Verlauf aufweisen. - Trennscheibe nach Anspruch 1 oder 2, oder dem Oberbegriff von Patentanspruch 1,
dadurch gekennzeichnet, daß das Verhältnis zu Speichen (12) und Trägheitsausnehmungen (11) derart bemessen ist, daß mindestens 30 %, insbesondere mindestens 33 %, vorzugsweise über 40 % der durch den Außenumfang der Trennscheibe (13) definierten Kreisfläche durch die Mehrzahl von Trägheitsausnehmungen (11) ausgespart ist. - Trennscheibe nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Trägheitsausnehmungen (11) durch einen umlaufenden Rand (14) begrenzt sind, wobei der umlaufende Rand mindestens zwei Krümmungsmaxima (A, C) aufweist, wobei das erste Krümmungsmaximum (A) am radial innersten Punkt und das zweite Krümmungsmaximum (C) am radial äußersten Punkt angeordnet sind und zwischen den Krümmungsmaxima (A, C) der umlaufende Rand (14) zumindest an einer Seite, vorzugsweise an beiden Seiten einen gekrümmten Verlauf aufweist. - Trennscheibe nach Anspruch 4,
dadurch gekennzeichnet, daß der umlaufende Rand (14) einer Trägheitsausnehmung (11) drei räumlich getrennte Krümmungsmaxima (A, B, C) aufweist. - Trennscheibe nach dem Oberbegriff von Patentanspruch 1 oder einem der Patentansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Speichen (12) zwischen den Trägheitsausnehmungen (11) einen verjüngten Bereich aufweisen. - Trennscheibe nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die Trennscheibe (13) einen zentralen Spannring (17) mit einer zentralen Spannöffnung (21) aufweist, wobei sich der zentrale Spannring (17) bis zu dem radialinnersten Punkt einer Trägheitsausnehmung (11) erstreckt, wobei die radiale Ringbreite des zentralen Spannrings (17) höchstens 25 %, vorzugsweise höchstens 20 % des Gesamtradius der Trennscheibe beträgt. - Trennscheibe nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Trennscheibe (13) eine Außenringzone (18) aufweist, die nach innen durch den äußersten Punkt der Trägheitsausnehmungen (11) begrenzt wird und im äußeren Bereich Schneidmittel (22) aufweist, wobei die Außenringzone (18) eine radiale Ringbreite von höchstens 18 %, vorzugsweise von höchstens 16 % des Gesamtradius der Trennscheibe (13) aufweist. - Trennscheibe nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Trägheitsausnehmungen (11) eine in etwa nierenförmige Gestalt aufweisen. - Schneidgerät für die Bearbeitung, insbesondere für das Trockenschneiden von harten Baumaterialien wie Gestein, Beton, Ziegel, Mauerwerk oder dergleichen, das eine in einem Schutzgehäuse (23) zumindest teilweise aufgenommene Trennscheibe (13) nach einem der Ansprüche 1 bis 9 umfaßt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10035435A DE10035435C2 (de) | 1999-08-25 | 2000-07-20 | Trennscheibe für ein Schneidgerät, insbesondere für ein Trockenschneidgerät, zum Schneiden von harten Baumaterialien |
| DE10035435 | 2000-07-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1174207A1 true EP1174207A1 (de) | 2002-01-23 |
| EP1174207B1 EP1174207B1 (de) | 2006-10-25 |
Family
ID=7649663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01115411A Expired - Lifetime EP1174207B1 (de) | 2000-07-20 | 2001-06-26 | Trennscheibe mit Trägheitsausnehmungen |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1174207B1 (de) |
| AT (1) | ATE343450T1 (de) |
| DE (1) | DE50111301D1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012005085A1 (de) † | 2012-03-13 | 2013-09-19 | Dr. Müller Diamantmetall AG | Werkzeug zum Bearbeiten von Materialien |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2625995A1 (de) * | 1976-06-10 | 1977-12-22 | Wurster & Dietz Maschinenfabri | Kreissaegeblatt |
| DE2703825A1 (de) * | 1977-01-31 | 1978-08-03 | Felde Richard Fa | Kreissaegeblatt |
| DE2717935A1 (de) * | 1977-04-22 | 1978-10-26 | Koenig J Gmbh & Co Werkzeugfab | Kreissaegeblatt mit aussparungen zum spannungsausgleich |
| DE2824213A1 (de) * | 1977-06-13 | 1978-12-14 | Ahlstroem Oy | Kreisfoermiges saegeblatt |
| DE19638718C1 (de) * | 1996-09-21 | 1997-10-16 | Betek Bergbau & Hartmetall | Sägeblatt für eine Vorrichtung zum Schneiden von Verkehrs-oder Standflächen |
| DE29901713U1 (de) * | 1999-02-01 | 2000-06-29 | Powertools International GmbH, 25474 Ellerbek | Sägeblatt |
-
2001
- 2001-06-26 AT AT01115411T patent/ATE343450T1/de not_active IP Right Cessation
- 2001-06-26 DE DE50111301T patent/DE50111301D1/de not_active Expired - Lifetime
- 2001-06-26 EP EP01115411A patent/EP1174207B1/de not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2625995A1 (de) * | 1976-06-10 | 1977-12-22 | Wurster & Dietz Maschinenfabri | Kreissaegeblatt |
| DE2703825A1 (de) * | 1977-01-31 | 1978-08-03 | Felde Richard Fa | Kreissaegeblatt |
| DE2717935A1 (de) * | 1977-04-22 | 1978-10-26 | Koenig J Gmbh & Co Werkzeugfab | Kreissaegeblatt mit aussparungen zum spannungsausgleich |
| DE2824213A1 (de) * | 1977-06-13 | 1978-12-14 | Ahlstroem Oy | Kreisfoermiges saegeblatt |
| DE19638718C1 (de) * | 1996-09-21 | 1997-10-16 | Betek Bergbau & Hartmetall | Sägeblatt für eine Vorrichtung zum Schneiden von Verkehrs-oder Standflächen |
| DE29901713U1 (de) * | 1999-02-01 | 2000-06-29 | Powertools International GmbH, 25474 Ellerbek | Sägeblatt |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1174207B1 (de) | 2006-10-25 |
| ATE343450T1 (de) | 2006-11-15 |
| DE50111301D1 (de) | 2006-12-07 |
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