Method for producing a quartz-glass hollow cylinder
AssigneeHeraeus Quarzglas GmbH & Co. KG
InventorRené Sowa
Life of this patent
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Abstract
Previously, in order to produce a dimensionally stable fused-quartz hollow cylinder, an output cylinder having a centre axis would have been prepared, said output cylinder being produced by means of a bore having a boring bar, said bore rotating about a horizontal axis of rotation, and by means of a boring head that has an internal bore and is fixed to said bore in a torsionally rigid manner, wherein the boring head adopts a continually changing boring head position that is continuously ascertained by means of a measuring device and is returned to a target position in the event of any deviation. The design outlay is high, however. The problem addressed by the invention is therefore that of providing a cost-effective method for producing a dimensionally stable fused-quartz hollow cylinder.
Claims10
A method for producing a hollow cylinder made of quartz glass, said method comprising:
- providing a start cylinder having a central axis, and a drill comprising a drill rod and a drill head non-rotationally fixed thereto, and
- producing with the drill an end bore that extends coaxially relative to the central axis, or enlarging an existing internal bore to obtain the end bore,
- wherein said drill rotates about a horizontal rotation axis, and the drill head has a continuously changing drill head position that is continuously determined using measuring device and said drill head is returned to a nominal position in case of a deviation, and
- wherein the drill head is returned to the nominal position by a rotating of the start cylinder about the central axis such that the drill head position moves above the central axis.
Dependencies are inferred from the claim text.