Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Having tool-opposing – work-engaging surface
Patent
1999-06-14
2000-04-18
Bishop, Steven C.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Having tool-opposing, work-engaging surface
408 92, 408712, B23B 4514
Patent
active
060507535
DESCRIPTION:
BRIEF SUMMARY
The present invention has particular, although not exclusive, relevance to an apparatus for mounting a drill on a pipe in environments where a magnetic mounting system would not be appropriate. Use of an apparatus to enable a drill to be held in a steady position whilst boring a hole into a pipe is considered advantageous. The use of such apparatus will enable a secondary branch pipe to be fitted and welded directly into the main pipe which has been bored. Such apparatus for holding a drill steady during a boring operation is of particular assistance when fitting a secondary pipe in situ.
It is known to provide a system for holding a drill steadily to a pipe to be bored by using magnetic attraction. Such systems would generally include an electromagnetic member which, when energised will hold a drill stand rigidly to a metallic pipe so that a drill mounted on the stand may bore a hole in a defined position on the pipe.
In certain circumstances, however, the use of such magnetically mounted systems is problematical. In environments which are particularly sensitive to electrical or magnetic fields, such as radar installations or computer factories, then this type of equipment cannot be used. Alternatively there may be situations in which the pipe to be bored comprises a non-magnetic material such as stainless steel, brass or clay.
Additionally, in the event of using a magnetically mounted drill for boring into a pipe, a separate safety chain is necessarily used because in the event of a power failure to the electromagnetic clamp, care needs to be taken to ensure that the entire apparatus does not fall and injure operators who may be standing underneath. U.S. Pat. No. 3,762,829 discloses a system for mounting a drill wherein the drill can be adjusted in two planes. The system allows the drill to pivot, having been adjusted, so that it may bore into the face of a solid shaft. Such a system, however, does not allow completely free adjustment of the drill and is also not arranged to permit the means which is mounted upon the shaft to be adjusted relative thereto with any ease.
U.S. Pat. No. 4,094,612 discloses an arrangement for fixing a drill stand in position whilst drilling into a pipe. The drill stand is magnetically mounted onto a ferromagnetic plate. The plate is secured to the pipe by a chain-whip clamping arrangement. The drill may only move in a direction radially toward or away from the pipe and still suffers the disadvantages associated with magnetic mounting--such as not being able to withstand large forces without becoming dislodged from the plate.
The aforementioned known types of mounting arrangements also tend to be relatively inflexible in their use. Once they are mounted on the pipe to be bored, then relative movement between the drill its mount and the pipe is not possible. Thus a very high degree of alignment between the drill and pipe must be obtained before firmly clamping the system in place. This tends to create an inflexible arrangement.
It is thus an object of the present invention to at least alleviate the aforementioned shortcomings and accordingly there is provided an apparatus for mounting a drill on a pipe, comprising: drilled, and means for mounting a drill press stand (143) on the platform (9), wherein the means for mounting the drill press stand on the platform allows the position of the drill press stand (9) to be adjusted relative to the platform characterised in that the relative adjustment between the drill press stand and the platform is in a direction parallel to the axis of the pipe (7) to be drilled, and wherein the pipe (7) may be drilled radially. By allowing the drill press stand to be adjusted relative to the platform, a more flexible arrangement is provided than has more hitherto been the case.
Preferably a means for clamping the platform on a pipe to be drilled comprises a backplate shaped to fit against the pipe, and means for attaching the platform to the backplate, with the pipe sandwiched therebetween. This arrangement is of particular benefit when being used i
REFERENCES:
patent: 3044324 (1962-07-01), Buck
patent: 3762829 (1973-10-01), Yilmaz
patent: 3922107 (1975-11-01), Fowler
patent: 4094612 (1978-06-01), Krieg
patent: 4936720 (1990-06-01), Dolatowski et al.
patent: 5051044 (1991-09-01), Allen
patent: 5713702 (1998-02-01), Turner
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