Machine for spinning tubular workpieces

Abstract

A machine for spinning tubular workpieces comprises a bed which mounts a spindle with a forming tool adapted for spinning a heated tubular workpiece and associated with a drive. There is provided a device for clamping the tubular workpiece, stationary mounted on the bed and arranged ahead of and coaxially with the spindle on the side thereof along which the tubular workpiece is fed thereinto, and a mechanism for feeding the tubular workpiece into the spindle, rigidly affixed on the bed ahead of the clamping device for gripping the tubular workpiece. The spindle of the machine for spinning tubular workpieces is made as a combination of a main sleeve and an auxiliary one with the bore axis of said main sleeve being somewhat offset with respect to the longitudinal axis of said main sleeve, whereas the auxiliary sleeve is turnably mounted within the aforesaid main sleeve and coaxially with its bore, the rotation speed of the auxiliary sleeve being slightly different from that of the main sleeve. Therewith, the forming tool is rigidly fixed in the auxiliary sleeve.

Dependencies are inferred from the claim text.