CZ20002903A3 - Rubber hog disk - Google Patents

Abstract

The invention relates to a rubber hog disk with at least two different grinding segments and consisting of several rings. Each segment is located on a separate ring and the rings are detachably joined to each other.

Description

Grinding wheel

Technical field

The present invention relates to an abrasive cleaning wheel having at least two different abrasive segments.

BACKGROUND OF THE INVENTION

DE-A-889 911 discloses abrasive wheels suitable for grinding hard metal tools and which are provided with diamond or other abrasive coatings on one or both abrasive surfaces in the annular zone of the surface area, consisting of several separate wheels.

[0005] EP-A-0 589 142 discloses abrasive wheels which can be balanced.

Abrasive abrasive wheels are special abrasive wheels that are used for the surface treatment of elastomers, particularly elastomeric roller layers coated with elastomers.

Until now, the abrasive clean-up wheels consisted of a metal ring coated on its circumference with tungsten carbide of varying grain size. In practice, grinding wheels with a fine-grained tungsten carbide segment in the center and one or two coarse-grained segments were most commonly used.

tungsten carbide on the sides. Particularly in order to allow working in two directions with these abrasive clean-up wheels, these wheels are provided with a center segment of fine-grained tungsten carbide and segments of coarse-grained tungsten carbide on both sides.

In practice, grinding wheels having several grinding segments, in which the side grinding segments are tapered in order to more uniformly transfer the thermal load to the elastomeric layer, have proven to be the most suitable.

The abrasive clean-up wheels are manufactured and sold, for example, by LRO-Europe B.V.B.A. and Sprangers B.V.B.A.

The tungsten carbide grain size is selected in the range from 170 to 550 µm according to the user's requirements. Abrasive wheel users can order different combinations of abrasive segment grain sizes for different elastomers. The grain sizes of the abrasive segments are selected in accordance with the requirements for the respective elastomers. These requirements depend on the material used and, in particular, on the hardness of the elastomer being worked, which may range from a Shore hardness of from 10 Shore A to 100 Shore D.

When the elastomeric layers are machined on the rolls, surface areas are formed which are sufficient for the technical rolls, depending on the material and the abrasive cleaning wheels used. However, it should be noted that the quality of the surface surfaces formed on the rollers will be worse and less uniform if the tungsten carbide grains become more weary. The quality of surface areas is especially • · ···· * · • ·

affected by imbalances that occur during use. Since the newly coated abrasive clean-up wheels are usually supplied in a very well balanced state, later balancing of the abrasive clean-up wheels is no longer possible by the user.

A further drawback of the abrasive clean-up wheels available so far is that the individual abrasive segments wear differently. It is then necessary to re-coat the abrasive clean-up wheels. For the purpose of this new coating, the abrasive clean-up wheels are returned to the supplier and are then returned to the user usually after two to four weeks.

In addition, different elastomers require that a large number of different abrasive cleaning wheels are available in stock, whose abrasive segments have different combinations of tungsten carbide grain sizes.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the aforementioned drawbacks and to provide an abrasive clean-up wheel that makes it possible to combine different abrasive segments, whereby the individual abrasive segments can be newly coated independently if they wear. In addition, the abrasive clean-up wheel can be additionally balanced by the user. Storage, transport and handling of the abrasive cleaners will thus be simplified.

The above object has now been achieved by providing a grinding wheel having at least two different grinding segments, each grinding segment being arranged on a separate ring, the rings being detachably connected to one another and arranged on a common a central body, the disc being an abrasive cleaning disc and one or two rings additionally provided with cutting tools.

The at least central ring then preferably has the possibility of balancing. This balancing option is preferably provided by a central ring having the finest grain size. Although the ring or rings with coarser grains which are laterally slid and bolted to the central ring may also have the possibility of balancing, it is generally sufficient if the central ring is provided with grooves in which balancing weights can be inserted and fixed.

Thus, the grinding wheel of the present invention consists of several rings and also has additional rings with cutting tools. A tightly screwed combination of cutting tools and abrasive cleansing segments has proven to be advantageous, especially when the diameter and speed of the abrasive clean-up wheel per minute allows cutting speeds of 10 to 150 m / s to be achieved. Especially at cutting speeds higher than 50 m / s, the elastomers no longer behave as elastomers, but as materials which can usually be machined by cutting tools.

DETAILED DESCRIPTION OF THE INVENTION

The accompanying drawing shows the individual components of an exemplary preferred abrasive embodiment.

The cleaning disc of the present invention, except cutting tools, wherein the reference numerals herein have the following meanings: < tb > ______________________________________ < tb >

- a central body;

- center ring with finer abrasive grains;

- laterally attachable rings with thicker ones;

abrasive grains;

- spacer disc;

- balancing weights;

6 layer j emnozrnného carbide tungsten; 7 layer coarse-grained carbide tungsten. As seen on attached image, it can be central

the ring 2 with the fine-grained tungsten carbide layer is first slid onto the central body 3 and fixed here by means of the spacer disk 4. Then the side rings 3 with the coarse-grained tungsten carbide layer 3 can be slid onto the central body. With a weight of different sizes, the entire abrasive clean-up wheel of the present invention can be appropriately balanced.

By using rings 2 provided with a different coating 6 on one side and side rings 3 with different tungsten carbide 7 grain sizes, any combination of grain sizes 6 and on the abrasive cleaning disc of the present invention can be achieved.

If the coarse tungsten carbide layers 1 wear on the side rings 3 more quickly, they can be replaced with new ones. The long-lasting layer on the central ring 2 can be reused until it also requires a new coating 6.

Thus, abrasive clean-up wheels with different ring combinations can be assembled easily and quickly with a single central body by simply assembling them. The short-lived side rings can be in stock in larger quantities, with a smaller number of central rings provided with fine-grained tungsten carbide.

It will also be appreciated that the abrasive cleansing discs of the present invention can be manufactured and combined in various sizes, dimensions and diameters.

Finally, rings with cutting tools that additionally remove a portion of the elastomer that would otherwise have to be removed with a layer of coarse tungsten carbide are attached laterally to the rings 3.

Claims (2)

PATENT CLAIMS An abrasive wheel having at least two different abrasive segments, each abrasive segment being arranged on a separate ring, the rings being detachably connected to each other and arranged on a common central body, characterized in that the disc is an abrasive clean-up wheel and one or two rings are additionally provided with cutting tools. Grinding wheel according to claim 1, characterized in that at least the central ring has the possibility of balancing.