EP2991804A1 - Drehendes schleifwerkzeug - Google Patents
Drehendes schleifwerkzeugInfo
- Publication number
- EP2991804A1 EP2991804A1 EP14716859.5A EP14716859A EP2991804A1 EP 2991804 A1 EP2991804 A1 EP 2991804A1 EP 14716859 A EP14716859 A EP 14716859A EP 2991804 A1 EP2991804 A1 EP 2991804A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- openings
- tool
- grinding body
- grinding tool
- 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
- 238000000227 grinding Methods 0.000 title claims abstract description 165
- 230000031700 light absorption Effects 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000002131 composite material Substances 0.000 description 5
- 239000011152 fibreglass Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 239000006061 abrasive grain Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/02—Wheels in one piece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with cooling provisions, e.g. with radial slots
Definitions
- the invention relates to a grinding tool having a grinding body rotatable about a rotation axis, in which openings are arranged such that a user or a grinder can work through the rotating grinding body during the grinding operation.
- the invention relates to a cylindrical abrasive article in which the grinder can pass through the rotating cylindrical abrasive article during grinding.
- Grinding or polishing bodies are known for different applications in the prior art.
- grinding and polishing bodies for cylindrical grinding machines are known in which more or less rigid disks or cylinders, which are acted upon at their grinding surface with an abrasive grain known.
- grinding or polishing bodies become, for example also used together with a grinding or polishing agent.
- different types of grinding wheels are known for various grinding purposes.
- flexible abrasive articles such as discs, strips, bands or lamellae are used, which carry abrasive grains on a backing of paper, fabric, fiber or fleece.
- an abrasive body for cylindrical grinding machines is disclosed, which is dedicated to the task of improving the service life of flexible abrasive sheets and the uniformity of the grinding performance.
- a grinding head for grinding flat surfaces.
- This document is dedicated to working when grinding flat surfaces by means of grinding wheels, which work with the flat end face and which are cushioned in particular with respect to the driving shaft, thereby achieving an all-round mobility, in particular by means of a ball joint.
- the grinding result can be improved.
- the grinding result during grinding does not depend solely on the grinding equipment. Besides the influences of the formation of the abrasive article, the abrasive grain and the grinding machines, there is a need to regularly monitor the grinding work.
- the special structure of composite materials such as glass fiber reinforced plastics, that the Abtragtiefe, that is, the processing depth in the path grinding, must be recognized during the grinding process and safely determined. Due to the different shades or the types of shades depending on the processing depth, the grinder can recognize how high the abrasion has progressed through the grinding.
- the disadvantage is that the grinder must periodically interrupt his work, but can not ascertain with certainty on the basis of the shading whether he has already removed one or more additional bond levels. For example, if the shades in their relative orientation from plane to plane change from a longitudinal shading to a transverse shading, it is possible that two or more additional planes have already been ground during grinding. Based on the orientation of the shading, the grinder can only recognize that it has removed at least one composite plane. However, ablation during grinding can not be reliably observed from the interconnected level to the interconnected level.
- the object is solved with the features according to the patent claim 1.
- the basic idea of the present invention is therefore to provide a grinding tool a to provide a rotary axis rotatable grinding body, are provided in the number and the position of suitable openings or openings or recesses, which are arranged with respect to the axis of rotation on diametrically opposite sides of the lateral surface of the grinding wheel so that the grinder during grinding through the can see through rotating grinding body.
- the invention which relates to an abrasive body with openings provided in the grinding surface, eliminates the aforementioned disadvantages in that the size, position and relative position of the openings in the form of slots, oblong holes, recesses or the like can be selected by that the workpiece covered by the grinder can be observed by the grinder through the grinding tool.
- openings e.g. Radial slots or slots are provided, which preferably have the same or different lengths to obtain the most constant view of the grinding surface.
- a grinding tool is provided with an abrasive body rotatable about an axis of rotation, wherein the outer surface of the abrasive body is designed as an abrasive surface and wherein the abrasive body has at least two openings passing through the abrasive body at sides of the lateral surface which are diametrically opposed with respect to the axis of rotation, which are arranged such that the operator can see through the rotating grinding body during grinding.
- the appropriate, in particular diametrically opposite arrangement of openings in the grinding wheel ensures that the respectively diametrically opposite openings at sufficiently fast rotation ie depending on the rotational speed, the view (optical path) on the surface to be ground or to be processed release and the viewer due
- the viewer sees a temporal juxtaposition of the eye 's inertia Images of the grinding surface that allow it to permanently monitor and observe the results of grinding without stopping or lifting the grinding tool off the surface to be machined.
- the grinding body is designed as a cylinder-shaped grinding body rotatable about the cylinder axis.
- the grinding body can also be designed as a conical grinding body, which can be rotated about the longitudinal axis of the cone.
- the abrasive body may be formed as a hollow cylindrical abrasive body, so that in the interior of the abrasive body, a recess is formed.
- a grinding tool is provided which has good air-cooling properties and in which due to air turbulence the grinding removal can be well sucked off, which is not the case, for example, with a grinding wheel in which the abraded material is between the grinding surface and the work piece given is.
- a recess in the grinding body is arranged between pairs of diametrically opposed openings so that between the opposite openings a fürsicht réellekeit (optical path) through the grinding body is created.
- the grinding tool is designed as a hollow-cylindrical grinding body, the interior of the grinding body already forms the aforementioned recess.
- the grinding tool can also be designed as a solid cylinder, so that pairs of opposing openings must be arranged by means of a recess connecting the openings, so that a see-through is achieved by the grinding body.
- the openings in this way, not designed as a hollow body grinding body can be provided with the openings according to the invention, so that the grinder during grinding by the rotating grinding body, that is through the openings and recesses, can see through. It is preferred to form the openings in the form of oblong holes. Whereby it is particularly preferred to orient the oblong holes transversely to the axis of rotation. In a particularly preferred embodiment, the oblong holes extend transversely to the axis of rotation over a radian measure of about 50 ° to about 100 °, more preferably between 80 ° and 90 °.
- each two diametrically opposite slots are arranged mutually parallel (in the axial height direction) in the grinding body, wherein above and below the slots an abrasive surface is arranged on the lateral surface. Between the oblong holes, the grinding wheel also has an abrasive surface.
- a grinding tool is provided, which forms a plurality of pairs of holes diametrically opposite openings 4a, 4b in the height direction H and circumferentially offset from each other in the grinding wheel 2.
- two diametrically opposite openings in the grinding wheel can be offset in the radial direction by 90 ° and in the direction of the height H in relation to the previously described slots arranged parallel to one another.
- the oblong holes are arranged approximately at a radian measure of 90 ° along the outer circumference of the lateral surface of the grinding body, this ensures that essentially sufficient transparency is available for the entire turning operation, even at low rotational speeds Surface is given, so that the grinder during the entire grinding process, the grinding point and, for example, the change in shades in glass fiber reinforced plastic with increasing erosion can recognize.
- the tool according to the invention of very different material geometries and material surfaces with e.g. dark, matte as well as to work with bright, reflective surfaces, as well as materials of different hardness.
- metallic materials of high hardness are often used.
- machining with shiny metallic tools is particularly problematic.
- the further object is to improve the tool to the effect that good visibility is provided by the tool under different lighting conditions.
- a metallically glossy tool surface reflects incident light more strongly than, for example, a matte composite material to be processed, the scattered light intensity due to the reflection is greater than the intensity of the light reflected back through the apertures into the viewer's eye from the material surface.
- the grinding tool is formed of a metallic material having a surface with a high degree of light absorption LA W in the wavelength range of visible light, in particular in the wavelength range x between 380-780 nm.
- LA W degree of light absorption
- the abrasive body has a surface which is formed with a high degree of light absorption above 80% in the wavelength range ⁇ between 380-780 nm, so that the surface appears dark to black and reflects only small scattered light back.
- the abrasive body has a black surface which is formed with a high degree of light absorption of almost 100% in the wavelength range ⁇ between 380 and 780 nm. It is advantageous to provide the abrasive body with a black surface coating, preferably a matte black surface coating, such as a black paint.
- the surface coating is a heat-resistant coating which thermally withstands the temperatures to be expected during the grinding process.
- the surface of the abrasive body can be provided with a heat-resistant matt black paint.
- an inventive grinding tool with a hollow cylindrical abrasive body and openings therein and an alternative embodiment of an inventive grinding tool with a hollow cylindrical abrasive body and openings in it;
- Fig. 3 shows a further embodiment of an inventive
- FIG. 4 shows a similar embodiment to FIG. 3 of an inventive device
- FIG. 1 shows a grinding tool 1 with an abrasive body 2 that can be rotated about a rotation axis 3.
- the axis of rotation 3 passes through the cylinder center axis of the grinding wheel 2.
- the grinding wheel 2 is connected to a shaft 10 which can be coupled to a drive, such as a rotary drive, to enable the grinding tool 1 to rotate.
- the abrasive body 2 is formed as a hollow cylindrical abrasive body.
- the cylindrical grinding body 2 has a jacket 7 with a lateral surface 6.
- the lateral surface 6 forms the grinding surface of the grinding body 2 and extends in the height direction H, which is oriented parallel to the axis of rotation 3 of the grinding tool 1.
- diametrically opposite openings 4a, 4b, namely elongated holes, are arranged with respect to the axis of rotation 3.
- the elongated holes 4a, 4b extend with their longitudinal extent transversely to the axis of rotation or transversely to the height direction H in the circumferential direction. It can also be seen that two elongated holes 4a are arranged parallel to one another and have a length corresponding to the radian measure of 70 ° -80 ° in the jacket 7 and represent window-like openings in the jacket 7. In this way, the grinder during grinding through the openings in the lateral surface 6 and in the shell 7 of the grinding wheel 2 by two pairs opposite Open through openings 4a, 4b.
- two further, diametrically opposite openings 4a, 4b are offset by approximately 90 ° in the circumferential direction to the previously described openings 4a, 4b.
- the length of the slots 4a, 4b is approximately identical in the embodiment shown here according to FIG. However, different lengths of slots in the shell 7 of the grinding wheel 2 can be arranged.
- the cylindrical grinding body 2 could also be formed as a solid cylinder.
- the respectively opposite openings 4a, 4b would have to be connected to one another by means of a recess connecting the openings through the cylindrical grinding body, such that a
- the recess 5 can also be configured differently, provided that it is ensured that two diametrically opposite openings 4a, 4b are connected to each other in such a way that a see-through possibility is obtained by the grinding body 2.
- FIG. 2 an alternative embodiment of an inventive grinding tool 1 with a hollow cylindrical abrasive body 2 and mounted therein, parallel to the height direction H extending openings 4a, 4b shown, wherein two diametrically opposed openings 4a, 4b are arranged so that a fürsicht réellekeit by the grinding wheel 2 is obtained.
- the surface of the abrasive bodies is preferably coated matt black and heat-resistant.
- the openings are formed in a triangular shape with rounded corners 9.
- the openings 4a, 4b are shaped such that the webs 8 of the grinding wheel 2 arranged therebetween extend diagonally (with respect to the axis of rotation 3).
- the openings 4a, 4b are formed with rounded corners 9.
- FIG 4 a, similar to the embodiment in Figure 3, similar embodiment 15 is shown in which also the openings 4a, 4b are formed in a triangular shape with rounded corners, wherein the lying between each two openings webs 8 are formed as diagonal webs , In this case, however, the grinding tool 1 is formed with a conical grinding body 2.
- the invention is not limited in its execution to the above-mentioned preferred embodiment of the invention. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different type of execution.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013208083 | 2013-05-02 | ||
DE102013218233.3A DE102013218233A1 (de) | 2013-05-02 | 2013-09-11 | Drehendes Schleifwerkzeug |
PCT/EP2014/057509 WO2014177374A1 (de) | 2013-05-02 | 2014-04-14 | Drehendes schleifwerkzeug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2991804A1 true EP2991804A1 (de) | 2016-03-09 |
EP2991804B1 EP2991804B1 (de) | 2022-02-23 |
Family
ID=51727466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14716859.5A Active EP2991804B1 (de) | 2013-05-02 | 2014-04-14 | Drehendes schleifwerkzeug |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2991804B1 (de) |
DE (1) | DE102013218233A1 (de) |
WO (1) | WO2014177374A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015221732A1 (de) * | 2015-11-05 | 2017-05-24 | Bayerische Motoren Werke Aktiengesellschaft | Drehendes Schleifwerkzeug |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841034A (en) * | 1972-11-10 | 1974-10-15 | G Held | Tread grinding wheel |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE570805C (de) | 1932-03-11 | 1933-02-20 | Hellmut Emmrich | Zum Schleifen ebener Flaechen dienender Schleifkopf |
DE948128C (de) * | 1949-09-19 | 1956-08-30 | Norbert Jenikowsky | Schleifscheibe |
DE1038434B (de) * | 1952-12-27 | 1958-09-04 | Norbert Jenikowsky | Schleifscheibe |
US2749681A (en) * | 1952-12-31 | 1956-06-12 | Stephen U Sohne A | Grinding disc |
DE2743585A1 (de) | 1977-09-28 | 1979-03-29 | Klaus Dipl Ing Groove | Chleifkoerper o.dgl. fuer rundschleifmaschinen |
JPH0437719Y2 (de) * | 1985-10-17 | 1992-09-04 | ||
JPH0253367U (de) * | 1988-10-12 | 1990-04-17 | ||
JPH02114459U (de) * | 1989-03-02 | 1990-09-13 | ||
GB2332162B (en) * | 1997-12-12 | 2002-09-18 | Simon Henry Jordan | Grinding disc |
JP2000127147A (ja) * | 1998-10-23 | 2000-05-09 | Osaka Diamond Ind Co Ltd | コアビット |
TW567116B (en) * | 1999-04-23 | 2003-12-21 | Saint Gobain Abrasives Inc | Rotary abrasive tool |
DK174530B1 (da) * | 2002-02-23 | 2003-05-12 | Mostrup Holding Aps | Cirkulært skæreskive til håndholdt værktøj, håndholdt værktøj med cirkulær skæreskive og med beskyttelsesskærm samt anvendelse af sådan skæreskive |
JP2007090565A (ja) * | 2005-09-27 | 2007-04-12 | Fs Technical Corp | ドリル用コアビット |
DE102009011493A1 (de) * | 2009-03-06 | 2010-09-09 | Rhodius Schleifwerkzeuge Gmbh & Co. Kg | Schleifstift |
-
2013
- 2013-09-11 DE DE102013218233.3A patent/DE102013218233A1/de active Pending
-
2014
- 2014-04-14 EP EP14716859.5A patent/EP2991804B1/de active Active
- 2014-04-14 WO PCT/EP2014/057509 patent/WO2014177374A1/de active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841034A (en) * | 1972-11-10 | 1974-10-15 | G Held | Tread grinding wheel |
Non-Patent Citations (1)
Title |
---|
See also references of WO2014177374A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102013218233A1 (de) | 2014-11-06 |
WO2014177374A1 (de) | 2014-11-06 |
EP2991804B1 (de) | 2022-02-23 |
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