A process for the preparation of a quartz glass - hollow cylinder.

摘要

Hitherto, for the manufacture of a dimensionally stable quartz glass - hollow cylinder having a center axis of the exit cylinder is provided which, by means of a rotatable about a horizontal axis of rotation rotating drill with boring bar and is non-rotatably fixed drill head with an inner bore is generated, wherein the drilling head of a continuously changing drilling head position, which is continuously determined by means of a measuring device and, in case of a deviation is returned to a desired position. The constructional expenditure is, however, large. The object of the invention, therefore, an inexpensive process for the production of a dimensionally stable to provide - hollow cylinder of quartz glass.