Patent Application
20060154583
This application claims the benefit of Netherlands Application No. NL 1028002, filed Jan. 11, 2005, the contents of which is incorporated herein by reference.
The invention relates to a grinding wheel for a floor grinding machine.
A grinding wheel is known from U.S. Pat. No. 3,745,719. The known grinding wheel includes a metal wheel with one surface on which a plurality of rectangular diamond-containing grinding elements are arranged. The known grinding wheel therefore has a single grinding side.
It is an object of the invention to provide a grinding wheel which makes more efficient use of materials.
This object is achieved by a grinding wheel for a floor grinding machine, comprising a metal wheel with a first and a second flat surface, diamond-containing grinding elements being arranged on the first flat surface, wherein grinding elements are also arranged on the second flat surface of the wheel.
The grinding wheel according to the invention has two grinding sides and lasts as long as two grinding wheels which can only be used on one side and the respective grinding sides of which correspond to the grinding sides of the grinding wheel according to the invention. Since the materials and manufacturing costs of the metal wheel represent a considerable proportion of the total cost price of a grinding wheel and according to the invention just one metal wheel is required to achieve the same service life as two of the known single-sided grinding wheels, the grinding wheel according to the invention is therefore in relative terms less expensive.
It is preferable for the grinding elements on the first and second flat surfaces of the wheel to have different grinding actions. As a result, a single wheel can be used to treat different floor surfaces. By way of example, a soft floor surface can be ground using grinding elements with a very hard diamond-steel compound on one side of the wheel, while a harder floor surface can be ground using grinding elements with a less hard diamond-steel compound on the other side of the wheel. This makes the grinding wheel according to the invention versatile to use.
It is preferable for all the grinding elements to be of the same shape. This further limits the production costs of the grinding wheel.
The invention will be explained in more detail with reference to the drawing.
Four first securing holes 4 and four second securing holes 5 with a diameter of preferably about 11 mm are arranged on an imaginary circle around the central opening 2. The first securing holes 4 and second securing holes 5 are located alternately around the circle. The securing holes 4 and 5 each have a conical section 4a and 5a, respectively, the diameter of the conical section 4a and 5a being approximately 22 mm at the wheel surface 1a or 1b, respectively.
During use, bolts or other securing means pass through the first securing holes 4 if the first side 1a of the wheel 1 faces towards the surface to be ground. In this case, the head of the bolt or the like, in this first fitted state, is recessed into the conical part 4a, below the surface 1a. The second securing holes 5 are not used in this first fitted state.
When the wheel 1 is turned over in order for the opposite side to be fitted to the grinding machine, bolts or the like are also passed through the securing holes 5, with the head of the bolts once again being recessed within the conical section 5a. In this second fitted state, the securing holes 4 are not used.
Furthermore, curved elongate grinding elements 12 which extend substantially in the radial direction of the wheel 1 are arranged on both sides 1a and 1b of the wheel 1. One of the end edges of the grinding elements 12 is located at or close to the outer circumference of the circular wheel 1. The radially arranged grinding elements 12 on the first side 1a and on the second side 1b have their concave sides facing in opposite directions, as will be clear from
In the example shown, the tangentially and radially arranged grinding elements 11 and 12 are identical in form, which limits the manufacturing costs of the grinding elements and therefore the cost price of the grinding wheel 10. The grinding surface of the grinding elements 11 and 12 lies approximately 10 mm above the surface of the wheel 1 on which they are arranged, i.e. the first side 1a or the second side 1b.
The grinding elements 11 and 12 are preferably made from a diamond-containing diamond-steel compound. It is possible for the grinding elements 11 and 12 which are arranged on one side 1a of the wheel 1 to be made from a different compound from the grinding elements 11, 12 which are arranged on the second side 1b of the wheel 1. This makes it possible to produce a grinding wheel 10 with different grinding actions on each side. It is also possible for diamond-containing grinding elements 11, 12 to be arranged on one side 1a, while grinding elements 11, 12 made from a compound which does not contain diamonds are arranged on the other side 1b.
It is preferable for the grinding elements 11 and 12 to be welded to the wheel 1, but other suitable joining methods are of course also possible.
It should be noted that in the embodiment shown a central opening 2 with a wavy shape is formed in the grinding wheel 10, but any other suitable shape of hole, for example circular or square, is also fundamentally possible.
| Number | Date | Country | Kind |
|---|---|---|---|
| NL 1028002 | Jan 2005 | NL | national |
