DE202019102371U1 - Grinding wheel and grinding arrangement - Google Patents

Abstract

A grinding wheel (100) for mounting on a sanding pad (20), having a plurality of through-holes (13) for removing sanding dust and a centering hole (14) for removing sanding dust, wherein the centering hole (14) is formed in the center of the abrasive wheel (100) , and wherein the centering opening (14) has an oval shape.

Description

The present invention relates to a grinding wheel for mounting on a sanding pad. Furthermore, the invention relates to a grinding arrangement with a sanding pad, which has a suction opening for sucking off sanding dust, and with a grinding disc arranged on the sanding pad.

State of the art

Abrasive arrangements with a grinding disc and a grinding disc arranged on the grinding disc are used for grinding workpieces, in particular workpieces made of materials such as wood, metal, plastic or a composite material.

From the DE 25 13 464 A1 a grinding arrangement is known, which has a grinding wheel which is placed on a sanding plate. The sanding pad is connected to a suction device for sucking off the sanding dust which forms during the sanding, the suction taking place via a suction opening formed on the sanding pad and through openings formed on the sanding disk. To fix the grinding wheel on the sanding pad, the sanding pad has mandrels which can engage in fastening openings of the sanding disk.

DESCRIPTION OF THE INVENTION: Problem, Solution, Advantages

The object of the present invention is to provide a grinding wheel and a grinding arrangement which are further improved in their construction and their function.

This object is achieved with the features of the independent claims. Advantageous developments of the invention are specified in the dependent claims.

The grinding wheel according to the invention is characterized in that it has a plurality of through holes for discharging grinding dust and a centering opening for discharging grinding dust, wherein the centering opening is formed in the center of the grinding wheel and wherein the centering opening has an oval shape.

The centering opening is used in addition to a suction of grinding dust formed during grinding for alignment of the grinding wheel relative to the grinding disc. The center of the grinding disc arranged centering opening according to the invention has an oval shape, so that it no longer has a circular or angular shape, as is known from the prior art. Due to the oval shape, the centering opening has a greater length than width. Due to the oval shape, it is possible in particular to achieve an air flow during the suction of grinding dust, within which hardly or no turbulence occurs any more. The suction of sanding dust can thereby be significantly improved and in particular done more efficiently. Furthermore, a centering opening having an oval shape has a considerably higher robustness than other forms of a centering opening, so that the durability and thus the service life of the grinding wheel can be increased, especially at elevated loads. In particular, in the case of the oval shape of the centering opening, a tearing of the grinding wheel, which is usually formed from a paper, can be prevented.

The plurality of through holes, which are formed on the grinding wheel in addition to the centering hole and also serve to remove grinding dust, are preferably distributed around the centering hole. These passage openings preferably have a different shape than the centering opening. Preferably, the plurality of through holes each have a circular shape.

In order to achieve the best possible functionality of the centering opening, it has been found that the centering opening can have a particular length-to-width ratio. It is preferably provided that the centering opening can have a ratio of a length of the centering opening to a width of the centering opening of 1.4 ≦ L / B ≦ 2.0, preferably of 1.6 ≦ L / B ≦ 1.8. For example, the centering opening may have a width of 10 mm and a length of 17 mm.

The object of the invention is also achieved by means of a grinding arrangement which has a sanding pad which has a suction opening for sucking off sanding dust and a sanding disk arranged on the sanding pad, the sanding disk being formed and developed as described above.

The grinding wheel is preferably arranged parallel to the sanding pad. The outer peripheral surface of the grinding wheel preferably corresponds to the outer peripheral surface of the grinding disc. Both the grinding wheel and the sanding pad preferably have a circular outer peripheral surface. About the suction opening of the sanding pad can be removed during grinding resulting grinding dust, the sanding pad can be connected via the suction with a suction device for this purpose. From a grinding surface of the grinding wheel of the resulting grinding dust on the through holes and on the centering of grinding wheel to the sanding pad be transported, which can be transported away via the suction opening on the sanding pad of the grinding dust by means of the suction device of the grinding assembly.

The suction opening is preferably formed in the middle of the grinding plate. Preferably, the centering opening of the grinding wheel is thus arranged in register with the suction opening. The centering opening of the grinding wheel can thus be arranged in alignment with the suction opening of the sanding pad. Suction dust removed via the centering opening can thus be guided directly into the suction opening on the sanding pad. As a result, swirling when sucking off the grinding dust in the region of the suction opening can be avoided.

The suction opening preferably has a circular shape. Thus, the shape of the suction opening preferably differs from the shape of the centering opening.

Preferably, the centering opening is formed larger than the suction opening. For this purpose, the centering opening preferably has a length and a width, which in each case is greater than a diameter of the suction opening. Both in the width direction and in the length direction, the suction opening is thus preferably overlapped by the centering opening. A development of turbulence between the centering opening and the suction opening and thus between the grinding wheel and the sanding pad can thus be avoided even more reliably.

Preferably, the grinding wheel can be attached to the sanding pad by means of a Velcro connection. Both on the grinding wheel and on the sanding pad can here be arranged Velcro means which can get caught in the assembly of the grinding wheel on the sanding plate together to connect the grinding wheel to the sanding plate kletthaftend. Additional fasteners must not be provided in this form of attachment of the grinding wheel to the sanding pad.

list of figures

• 1 eine schematische Darstellung einer Schleifscheibe gemäß der Erfindung,
• 2 eine schematische Schnittdarstellung einer Schleifanordnung gemäß der Erfindung, und
• 3 eine weitere schematische Darstellung einer Schleifanordnung gemäß der Erfindung.

Further, measures improving the invention will be described in more detail below together with the description of preferred embodiments of the invention with reference to FIGS. Show it:

• 1 a schematic representation of a grinding wheel according to the invention,
• 2 a schematic sectional view of a grinding arrangement according to the invention, and
• 3 a further schematic representation of a grinding arrangement according to the invention.

Preferred embodiment of the invention

1 schematically shows a grinding wheel 100 Here is a plan view of a grinding surface 10 the grinding wheel 100 is shown. In 2 and 3 is a grinding arrangement 200 shown in which a grinding wheel 100 on a sanding plate 20 is arranged.

The grinding wheel 100 has a circular outer peripheral surface 11 on. The sanding plate 20 also has a circular outer peripheral surface 21 on.

Furthermore, the grinding wheel has 100 several through holes 13 on, over which grinding sanding dust from the grinding surface 10 towards the sanding plate 10 and one on the sanding plate 10 trained suction opening 24 can be transported. The suction opening 24 may be connected to a suction device, which via the suction opening 24 the sanding dust from the sanding assembly 200 can suck.

The passage openings 13 show at the in 1 each embodiment shown a circular shape. But they can also have other shapes.

Next points the grinding wheel 100 a centering opening 14 on, over which also sanding dust from the grinding surface 10 towards the sanding plate 20 can be dissipated. The centering opening 14 is in the middle of the grinding wheel 100 arranged. The several passage openings 13 are around the centering hole 14 arranged distributed around.

The centering opening 14 has an oval shape. Due to the oval shape, the centering opening 14 a greater length L as width B on. For example, the centering opening 14 have a length of L = 17 mm and a width of B = 10 mm. The size of the length L and the width B the centering hole 14 is preferably dependent on the size of the outer circumferential surface 11 the grinding wheel 100 ,

The suction opening 24 of the sanding plate 20 is positioned so that the centering hole 14 in overlap with the suction opening 24 is positioned as in 2 and 3 is shown. suction 24 and centering opening 14 are thus arranged in alignment with each other.

As in 2 and 3 can be seen, the suction opening points 24 a circular shape, so that the shape of the suction opening 24 from the shape of the centering hole 14 different. The centering opening 14 is made larger than the suction opening by the length L and the width B the centering 14 each larger than the diameter D the suction opening 24 , The centering opening 14 thus overlaps the suction opening 24 ,

Attached is the grinding wheel 100 on the sanding plate 20 by means of a Velcro connection.

The invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which makes use of the solutions shown even in fundamentally different versions. All features and / or advantages resulting from the claims, the description or the drawings, including design details, spatial arrangements and method steps, can be essential to the invention, both individually and in the most diverse combinations.

LIST OF REFERENCE NUMBERS

100

grinding wheel

10

grinding surface

11

Outer circumferential surface

13

Through opening

14

centering

200

grinding system

20

sanding pad

21

Outer circumferential surface

22

fastener

24

suction

L

length

B

width

D

diameter

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2513464 A1 [0003]

Claims (8)

A grinding wheel (100) for mounting on a sanding pad (20), having a plurality of through-holes (13) for removing sanding dust and a centering hole (14) for removing sanding dust, wherein the centering hole (14) is formed in the center of the abrasive wheel (100) , and wherein the centering opening (14) has an oval shape. Grinding wheel (100) after Claim 1 , characterized in that the plurality of through holes (13) each have a circular shape. Grinding wheel (100) after Claim 1 or 2 characterized in that the centering aperture (14) has a ratio of a length (L) of the centering aperture (14) to a width (B) of the centering aperture (14) of 1.4 ≤ L / B ≤ 2.0, preferably 1, 6 ≤ L / B ≤ 1.8. An abrasive assembly (200) comprising a sanding pad (20) having a suction opening (24) for sucking off abrasive dust and a grinding wheel (100) disposed on the sanding pad (20), characterized in that the abrasive wheel (100) is in one of Claims 1 to 3 is trained. Abrasive assembly (200) according to Claim 4 , characterized in that the centering opening (14) of the grinding wheel (100) is arranged in register with the suction opening (24). Abrasive assembly (200) according to Claim 4 or 5 , characterized in that the suction opening (24) has a circular shape. Grinding arrangement (200) according to one of Claims 4 to 6 , characterized in that the centering opening (14) has a length (L) and a width (B) which are each greater than a diameter (D) of the suction opening (24). Grinding arrangement (200) according to one of Claims 4 to 7 , characterized in that the grinding wheel (100) is fixed to the sanding pad (20) by means of a Velcro connection.

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