This invention relates to an attachment for a drilling machine, for use in the making of holes in hard composite tiles.
Many types of rotary glass & tile drills have been suggested in the past and have been in use for many years and find extensive use on building sites and other locations where there has been a necessity to drill tiles of a soft composition. None of which however have been entirely satisfactory for cutting holes in tiles of a hard composition.
While a diamond core drill will, of course, cut through tiles of a hard composition, experience has shown that a water spray must be employed to cool the drill while in operation or the diamonds will be lost. Not only does this necessitate the need for expensive drilling rigs in order to supply the cooling water, but the tiles become saturated with water which tends to make them incompatible with adhesives used to hold the tiles in place.
A basic object of the present invention is the provision of a tile drilling attachment that will produce holes in tiles of a hard composition. The invention is also designed to minimise the chipping of the hard material and particularly the glazed surfaces of the ceramic tile when a hole is being cut without the necessity of a cooling water supply.
According to the present invention, there is provided a tile cutting attachment for the cutting holes in tiles of a hard composition comprising.
The invention provides an attachment that can produce holes in hard composite tiles, without chipping the material surface and without the need for water-cooling.
Preferred or optional features of the Invention:
The cutting tip has a protective, heat resistance coating produced from—TiN
The cutting tip has a protective, heat resistance coating produced from—TiAlCrN
The cutting tip has a protective, heat resistance coating produced from—TiCN
The cutting tip has a protective, heat resistance coating produced from—TiAIN/VN
The cutting tip has a protective, heat resistance coating produced from—Diamond
The cutting tip is manufactured from tungsten carbide
The cutting tip is manufactured from cermet
The cutting tip is manufactured from ceramic.
The tip should be attached to the shaft by means of brazing.
The tip should be attached to the shaft by means of welding.
The tip should be provided with 6 cutting edges.
The shaft should be manufactured from Carbon Steel.
The shaft should be manufactured from Alloy Steel.
One example of a Tile cutting attachment in accordance with the invention is shown in the accompanying drawings.
A tile cutting attachment,
The tip 2 encompasses a plurality of cutting edges with adequate clearance 5 (10-20°). The tip 2 is provided with a point 6 (90°) to enable accurate location and assist in the start of drilling. The point 6 is provided with adequate an adequate clearance angle 7 (60°) to provide a cutting edge.
Secondary cutting angles are also provided 8 (30°).
The tip 2 has a recess 9 to allow accurate centralisation to the shaft 1.
Number | Date | Country | Kind |
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0201197.1 | Jan 2002 | GB | national |
Filing Document | Filing Date | Country | Kind |
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PCT/GB03/00180 | 1/17/2003 | WO |