EP0781629B1 - Directly or indirectly adaptable grinding body for a machine or a manually operable grinding device holder, as well as a suitable adapter for same - Google Patents

Abstract

A grinding member attachable to a grinding disc, an attachment plate of a grinding machine, or a manual holder, and including an abrasive-containing layer, and a perforation substantially uniformly distributed over at least a portion of a surface of the abrasive-containing layer and extending through an entire thickness of the abrasive-containing layer, with the perforation being formed of a plurality of openings so spaced from each other that unhindered suction of abrasive dust is insured; and adapter for attaching the grinding member.

Description

The invention relates to an abrasive body according to the Preamble of claim 1, a combination of one Abrasive body and an abrasive holder and one for appropriate application on a machine grinding plate or sanding plate or on an actuatable Abrasive holder with or without suction, suitable adapter.

Abrasive bodies of the type mentioned, in particular machine-adaptable grinding wheels are in the most varied Embodiments, in terms of structure and known geometric shape. For example, for orbital sanders suitable, circular grinding wheels commercially available with a velor on the back for attaching to the sanding plate. The Grinding wheels also have, for example, six or eight holes arranged in a circle by several Millimeters in diameter with the corresponding Drilled hole in the sanding plate covered must be removed in order to extract the grinding dust enable (catalog Bosch DIY program 1994/95, P. 22).

Other abrasives are in the form of sanding grids known (US 4 937 984, US 5 007 206, US 5 503 627). However, sanding grids are difficult to attach because they need to be excited. You only have one relative short service life.

To achieve a perfect grinding result, the continuous removal of the Grinding dust. Is such a removal of the Grinding dust does not exist or becomes such This is caused by inadequate removal for clogging the grinding wheel so that e.g. the individual Abrasive grain can no longer take effect. The The consequence of this is an unsatisfactory grinding result and a considerably reduced service life of the Grinding wheel.

The consequence of this, for example, was the arrangement of suction devices in the grinding plate or Grinding plate of the machine, the grinding wheel with Means was provided, so that the suction theoretically should be fulfilled in which the Perforated holes with the suction channels of the grinding plate or the plate. This Measures also apply to manually usable abrasive holders, which are provided with suction devices can.

However, in order to ensure a basic function, it is necessary for the user to apply the grinding body with its openings congruent to the suction channels of the grinding plate or the grinding plate or the other tool aids, but experience has shown that most users do not pay attention to this. This proves to be even more difficult if an adapter part is to be assigned between the grinding body and the grinding plate or grinding plate or grinding block or the like. In practice, however, a satisfactory removal of the grinding dust is not to be expected even when the adapted parts are arranged one above the other in accordance with the regulations. This is because the grinding dust is not sucked up or removed where it is created, but where it is transported under the suction holes by the rotation or oscillation movement of the grinding wheel.
In the meantime, the grinding dust is both ground on the workpiece and pressed into the grinding surface, where it leads to clogging of the abrasives.
This ultimately leads to an unsatisfactory grinding result.

The present invention is therefore based on the object based on a grinding wheel as well as corresponding Adaption means for machines or manual tools too create the disadvantage of the state of the described Counter technology effectively and at the same time continuous, regular and satisfactory Removal of the grinding dust ensures which both can be used individually or in combination are.

According to the invention, this object is achieved by a grinding wheel according to the characterizing part of claim 1, by a Combination of an abrasive wheel and an abrasive holder according to claim 12 or by an adapter solved according to claim 14.

Particularly preferred developments of the invention are characterized in the subclaims.

According to the invention, both the grinding wheel and also the one used for some work-related fastenings Adapter a network of breakthroughs that both among themselves, i.e. communicate with each other, as well as, for example, with the suction device Machine in communication so that both the exhaust air as well as the particle flow is effective and the dust can be removed.

Depending on how the structure of the grinding wheel is chosen is sufficient, the perforation in one Arrange layer of the grinding wheel if the underlying one Layer is gas and particle permeable. With other grinding wheels, with a different type Layer structure, it may be useful to perforate not by one, but by several or all Layers to let penetrate.

The same applies to the construction of the adapter.

Therefore, the present invention is characterized from that by means of this on the one hand a machine adaptable Abrasive body is formed, the least consists of a layer containing the abrasive and directly or indirectly using an adapter on the Sanding disc or the grinding plate of the machine can be attached to work and where means are provided with the suction of the Sanding plates or the grinding plate of the machine can cooperate, being the essence of the present Invention is that at least the grinding wheel has a perforation that is approximately even over spread the entire surface of the grinding wheel or is at least partially arranged and at least that Abrasive layer penetrates, the Distance of the individual who form the perforation Breakthroughs to each other and to the Suction devices of the grinding plate or Sanding plate are arranged so that an almost jam-free Transport of the grinding dust is effected.

On the other hand, by the present invention Grinding wheel provided on a manually actuatable abrasive holder can be applied, which is also equipped with suction devices and to one external suction system is coupled.

According to the invention, this grinding wheel is characterized by that it consists of at least one containing the abrasive Layer exists and that directly or with the help of a Adapters indirectly on an abrasive holder can be fastened to suit the work and also means are provided with the suction of the Abrasive holder can interact. The essence this grinding wheel is characterized in that at least the grinding wheel has a perforation, which are approximately even over the entire surface of the Distributed abrasive or at least partially arranged and at least the one containing the abrasive Layer penetrates, the distance of each, the Perforations forming each other and opposite the suction devices of the abrasive holder are arranged so that an almost dustless transport of the grinding dust is caused.

Furthermore, the invention provides a grinding wheel created the one without suction devices satisfactory removal of the grinding dust causes. It was recognized that the presence of the Perforation of the sanding dust solely by the contact pressure away from the grinding surface and in zones and layers is pushed behind the grinding plane. So is a Clogging of the abrasive grains almost avoided.

In a particularly preferred embodiment provided that the adapter also has one with the perforation the interacting perforation of the grinding wheel.

A first particularly preferred embodiment of the present invention provides an abrasive body which consists of the layer containing the abrasive and / or the layer carrying or embedding the abrasive and / or the Velcro adaptation layer, which are penetrated together by the perforation.
An auxiliary functional layer can be arranged between the layer containing the abrasive or its carrier or embedding layer and the Velcro adaptation layer. Such auxiliary function layers can be formed as elastic adaptation layers or compensation layers, for example made of foam. However, these auxiliary function layers can also have a temperature blocking effect and be suitable for both wet and dry grinding. All the layers forming the grinding wheel are preferably penetrated by a common perforation. However, especially if the auxiliary functional layer consists of a foam-like structure, it does not provide any perforation, but rather forms communication and transport channels itself through its foam-like structure, between the perforations of the perforation of the adjacent layer and the suction devices of the grinding plate or the tools used. The perforation as well as the communication channels can flow through gas and particles.

The shapes of the perforations forming the perforation can be circular, angular and oval. You can also through slot-like openings, which are linear or are aligned in an arc. This applies to the perforation of the grinding wheel as well also for the perforation of the adapter. Both the Abrasive wheel as well as the adapter can be disc-shaped circular, angular, i.e. rectangular or triangular or also be star-shaped. The abrasive backing consists of paper, tissue or a fleece.

The present invention also provides an adapter ready to work on machine or Abrasive holder arrangement of a conventional as also an abrasive wheel according to claims 1 to 11 is suitable and is characterized in that the Velcro adapter layer adapter, one Foam particle layer and a velor layer, the one pointing to the grinding wheel Velcro adaptation layer penetrated by the perforation is. The perforation as such, both in the grinding wheel as well as in the adapter according to the invention, where the layer as such gas or particle flow impermeable. The property of Abrasive body in terms of structure and layers, with Exception of the grinding layer, also apply to the Adapters.

Figur 1

eine Draufsicht auf eine erste Ausführungsvariante der vorliegenden Erfindung, hier eine mit Klettadaptionsfläche versehene Schleifscheibe

Figur 2

das in Figur 1 mit A gekennzeichnete Detail in einer Vergrößerung;

Figur 3

einen Schnitt entlang der in Figur 2 angedeuteten Linie B-B in einer Vergrößerung;

Figur 4

eine Seitenansicht eines Schleiftellers;

Figur 5

die Unterseite des Schleiftellers nach Figur 4 aus der in Figur 4 angedeuteten Richtung C;

Figur 6

einen Adapter in der Draufsicht auf die Klettadaptionsfläche;

Figur 7

einen Schnitt entlang der in Figur 6 angedeuteten Linie D-D, wobei der geschnittene Adapter 4 nur in einem Teilbereich, und zwar in vergrößerter Darstellung gezeigt ist.

Figuren 8 bis 16

verschiedene Varianten der Perforationsbildung.

The accompanying drawings, which show particularly preferred exemplary embodiments of the invention, will now be used to describe it.
Show:

Figure 1

a plan view of a first embodiment of the present invention, here a grinding wheel provided with Velcro adaptation surface

Figure 2

the detail marked with A in Figure 1 in an enlargement;

Figure 3

a section along the line BB indicated in Figure 2 in an enlargement;

Figure 4

a side view of a grinding plate;

Figure 5

the underside of the grinding plate according to Figure 4 from the direction C indicated in Figure 4;

Figure 6

an adapter in plan view of the Velcro adaptation surface;

Figure 7

a section along the line DD indicated in Figure 6, the cut adapter 4 is shown only in a partial area, namely in an enlarged view.

Figures 8 to 16

different types of perforation.

First, reference is made to FIGS. 4 and 5. The Figures 4 and 5 show a grinding plate 5, the with Suction devices 7, here individual radially arranged Holes. About these Suction devices 7 is conventionally the removed grinding dust is fed into a collecting bag, the actual suction device on or in Grinder is integrated. This representation is representative of a grinding plate or one other abrasive holder 6 with or without Suction devices.

According to the invention, the functionally correct one now applies Feeding the grinding dust to these suction devices 7 or to ensure equivalent removal. Conventionally, the abrasives for example circular grinding wheels, also with Provide openings that are congruent to the Suction devices 7 are to be applied. As at the beginning already mentioned, this prior art cannot ensure that the grinding result is satisfactory fails. The reason for this lies in the actual system. The grinding plate 5 has a Velcro adaptation surface 17. Above it is a pressure and shock compensating softer layer 18. Both the latter layer and the The perforation surface is fixed on a support plate 19 applied which a connecting element 20 for Owns the machine. Both the Velcro adaptation surface 17 and also the soft layer 18 and the support plate 19 of the Sanding discs are in shape from the suction devices 7 penetrated by perforations or bores.

If the grinding wheel 1 is now improperly applied to the grinding plate 5, ie if the conventional bores of the grinding wheel, which are congruent with the suction devices 7, are not positioned exactly over the suction device 7, the suction of the grinding dust is destroyed.
But even if the grinding wheel is properly positioned, continuous extraction is not guaranteed for the reasons already mentioned.

According to the invention, a grinding wheel 1 according to FIG. 1 is now used to 3 and an adapter according to Figures 5 to 7 created. The general idea of the invention is expressed for example in Figures 1 to 3. According to the invention the grinding wheel 1 is provided with a perforation 8, which is distributed over the entire area, for example. The abrasive body 1 can be made from a wide variety Layers are formed. This depends on respective grinding process, quality of the ground Layer and the material to be found. At least it is according to the invention the layer 3 carrying the abrasive 2 of the perforations 9 forming the perforation 8 enforced. Through this arrangement of the invention Openings 9 of the perforation 8 to one another and opposite the suction devices 7 of the grinding plate 5 is an almost dust-free transport of the grinding dust the suction devices 7 causes. For example, the inventive grinding wheel 1, from which Abrasive 2 layer 3 and the Abrasive 2 or the abrasive 2 embedding layer 10 and a Velcro adaptation layer 11 formed, all penetrated by the perforation 8 are.

So there are grinding wheels for this invention in which the most varied layer structure is possible. For example, according to FIG. 3a, this can also be an auxiliary functional layer 12 arranged between the layer 3 containing the abrasive 2 or its carrier or embedding layer 10 and the Velcro adaptation layer 11, which can be present, for example, as a foam body for the purpose of elastic adaptation and compensation, but also as a temperature barrier layer. This can also be produced for wet or dry grinding designs.
As explained above, all the layers forming the grinding body 1 can be penetrated by a common perforation or only individual layers can be penetrated by this.
One embodiment of the present invention is that the auxiliary functional layer 12 has no perforation 8, but rather forms communication channels 13 between the openings 9 of the perforation 8 and the suction devices 7 of the grinding plate 5 due to its own foam-like structure. It goes without saying that both the perforation 8 and the communication channels 13 can flow through both gas and particles. The same also applies to the construction of the adapter according to FIGS. 6 to 7. The adapter 4 also provides the perforation 8 here, which, if the adapter 4 consists of a Velcro adaptation layer 14, only penetrates this if a foam particle layer 15 is also shown, as shown here a subsequent velor layer 16, which can itself be flowed through.

FIG. 8 shows a perforation 8 which is formed from circular openings. FIG. 9 shows star-shaped openings 9 and FIG. 10 polygonal openings 9. These openings can be symmetrical like the square, rectangular or triangular openings according to FIGS. 11 to 13, or they can be of an asymmetrical shape. FIG. 14 shows oval openings 9. The choice of the geometric shape is determined by the respective application. So slot-like openings 9 in a linear (FIG. 15) or arc-shaped alignment (FIG. 16) are also possible. The essence of the invention is determined, inter alia, by the perforations in the grinding wheel and in the adapter or their layer structure. It was thus recognized that both the grinding wheel and the adapter can be used separately or in combination with one another. The adapter according to the invention can even be used with conventional
Abrasive bodies having perforations can be used in the sense of the inventive concept.

Reference list

1

Grinding wheel

2nd

Abrasives

3rd

Layer for 2 (load-bearing)

4th

adapter

5

Sanding disc / plate

6

Abrasive holder

7

Suction device

8th

perforation

9

Breakthroughs of 8

10th

Layer for 2 (embedding)

11

Velcro adaptation layer from 1

12th

Auxiliary function layer

13

Communication channels from 12/15

14

Kleppadaptionsschicht of 4

15

Foam particle layer from 4

16

Velor layer from 4

17th

Velcro adaptation area of 5

18th

Intermediate layer of 5

19th

Carrying plate from 5

20th

Connection element of 5

Claims (16)

1. Grinding body, at least consisting of a particle stream-impermeable layer (3) comprising an abrasive (2), which can be mounted in a manner fit for work directly or by means of an adapter (4) indirectly on an abrasive holder (5, 6), with apertures (9) which at least pass through the layer (3) comprising the abrasive (2), and a layer, in particular a hooking adaptation layer (11), which is gas-permeable and particle stream-permeable, characterised in that the apertures (9) are constructed as a perforation (8) through which gas and particles can flow and which is distributed approximately uniformly over the whole surface area of the grinding body or part of it, wherein the individual apertures (9) forming the perforation (8) are connected to each other and the distance between them is selected such that continuous transport of the grinding dust almost without congestion is caused.
2. Grinding body according to claim 1, characterised in that the layer (3) comprising the abrasive (2) and the hooking adaptation layer (11) together have the perforation (8) passing through them.
3. Grinding body according to claim 1 or 2, characterised in that between the layer (3) comprising the abrasive (2) or its carrier or embedding layer (10) and the hooking adaptation layer (11) is arranged an additional gas-permeable and particle-permeable layer which is formed as a resilient adaptation layer or equalisation layer or as a temperature barrier layer or is suitable for wet and/or dry grinding.
4. Grinding body according to claims 1 to 3, characterised in that the layers forming the grinding body (1) have a common perforation (8).
5. Grinding body according to claims 1 to 4, characterised in that the additional layer (12) has no perforation (8) and due to a foam-like structure forms communication channels (13) between the apertures (9) of the perforation (8) of the adjacent layer and the extraction means (7) of the abrasive holder (5, 6).
6. Grinding body according to claims 1 to 5, characterised in that gas and particles can flow through the communication channels (13) too.
7. Grinding body according to claims 1 to 6, characterised in that the perforation (8) is formed by circular, angular or oval apertures (9).
8. Grinding body according to claims 1 to 6, characterised in that the perforation (8) is formed by slot-like apertures (9) which are oriented in particular linearly or arcuately.
9. Grinding body according to claims 1 to 8, characterised in that it is disc-shaped.
10. Grinding body according to claims 1 to 9, characterised in that it is round, angular, in particular rectangular, triangular or star-shaped.
11. Grinding body according to claims 1 to 10, characterised in that the abrasive carrier is made of paper, a woven fabric or fleece.
12. Combination of a grinding body according to any of claims 1 to 11 and an abrasive holder (5, 6) to which the grinding body is attached and which comprises means which cooperate with extraction means (7), and the distance between the apertures (9) and the extraction means (7) of the abrasive holder (5) is selected such that transport of the grinding dust almost without congestion is caused.
13. Combination according to claim 12, characterised in that it can be mounted on an abrasive holder (5) of a machine constructed as a grinding disc or grinding plate.
14. Adapter for mounting in a manner fit for work both a conventional grinding body and a grinding body according to claims 1 to 11 on a machine or abrasive holder, which consists of a hooking adaptation layer (14), a foam particle layer (15) and a velours layer (16) which are gas-permeable and particle stream-permeable, wherein through the hooking adaptation layer (14) facing towards the grinding body (1) passes a perforation (8) which is gas-permeable and particle stream-permeable and distributed approximately uniformly over the whole surface area of the adapter or part of it.
15. Adapter according to claim 14, characterised in that the foam particle layer (15) is constructed as a resilient adaptation layer or equalisation layer or as a temperature barrier layer or is suitable for wet and/or dry grinding.
16. Adapter according to claim 15, characterised in that the foam particle layer (15) has no perforation (8) and due to the foam-like structure forms communication channels (13) through which gas and particles can flow between the apertures (9) of the perforation of the adjacent layer and the extraction means of the grinding disc or grinding plate or the abrasive holde.

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