CZ290209B6 - Rubber hog disk - Google Patents

Abstract

The present invention relates to a rubber hog disk being provided with at least two different grinding segments and consisting of several rings, whereby each segment is placed on an independent ring. The rings are removably coupled with each other and are mounted on a common central body (1), wherein one or two rings can be optionally provided with cutting tools. Preferably, at least one ring posses a possibility to be balanced.

Description

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 of the abrasive surfaces in the annular zone of the surface area, consisting of several separate wheels .

[0007] 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, especially 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 different grain sizes. In practice, abrasive abrasive wheels having a fine grain tungsten carbide segment in the center and one or two segments of coarse grain tungsten carbide on the sides were most commonly used. 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-tungsten carbide and segments of coarse-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 chosen 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 the surfaces is particularly influenced by the imbalance that occurs 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.

-1 CZ 290209 B6

A further drawback of the abrasive cleaning discs available up to now 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 a large number of different abrasive abrasive wheels having abrasive segments having 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 easy to combine different abrasive segments, whereby the individual abrasive segments can be re-coated independently when worn. 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 each other and arranged on a common central body, the wheel being the grinding wheel and one or two rings are 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 cleaners 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.

Overview of the figure in the drawing

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

- a central body;

- center ring with finer abrasive grains;

- laterally attachable rings with coarser abrasive grains;

- span wheel;

- balancing weights;

a fine-tungsten carbide layer;

- coarse tungsten carbide layer.

-2GB 290209 B6

DETAILED DESCRIPTION OF THE INVENTION

As can be seen in the attached figure, the central ring 2 with the fine-tungsten carbide layer can first be slid onto the central body 1 and fixed here by means of a span disc 4. Then, the side rings 3 can be slid onto the central body 1 with a thick layer 7 of tungsten carbide. They can be tightly screwed to the central body 1. By inserting balancing weights 5 of different sizes, the whole grinding wheel according to the invention can be appropriately balanced.

By utilizing different coated coating rings 6 on one side and side rings 3 with different tungsten carbide grain size layers 7, any combination of grain sizes 6 and 2 on the abrasive clean-up wheel of the present invention can be achieved.

If the coarse tungsten carbide layers 7 wear more quickly on the side rings 3, they can be replaced with new ones. The long-life layer on the central ring 2 may be reused until it also requires a new coating layer 6.

Thus, abrasive clean-up wheels with different ring combinations can be assembled easily and quickly with a single central body 1 by simply assembling them. The short-lived side rings can be in stock in larger quantities, with a smaller number of central tungsten carbide rings being sufficient.

It will also be appreciated that the abrasive cleansing discs of the present invention may 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 by means of the coarse-tungsten carbide layer 7 are attached laterally to the rings 3.

Claims (2)

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. 2. The grinding wheel of claim 1 wherein at least the central ring has a balancing capability.