METHOD FOR PRODUCING A QUARTZ-GLASS HOLLOW CYLINDER

摘要

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.

主权项

1. 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.