APPARATUS FOR GENERATING THREADS AND THE LIKE

摘要

The invention relates to an apparatus for generating threads (66) in a work-piece (64) which is adapted to constitute a mould surface in the manufacturing of parts which are provided with threads and are manufactured from plastic or other materials which are subjected to dimensional changes. When manufacturing work-pieces which shall constitute tools for forming threads (66) in materials which are subjected to dimensional changes it is a complicated and time consuming work to compensate the pitch of the thread (66) with regard to the dimensional changes. In order to obviate this problem there has according to the invention been provided an apparatus for generating threads (66) and the like, which apparatus comprises a compensation device for changing the relationship between the rotation and feeding of the surface which shall be provided with a thread (66) to a predetermined degree in order to change the pitch of the thread (66) from a value supplied to the compensation device to a value which has been modified to the desired degree.