Interchangeable tool head for a nc machine

Claim 1

A tool head for a rotating of a nc machine, comprising a surface slide serving as a tool holder, which surface slide is mounted in the tool head and is displaceable in a radial direction with respect to the spindle axis by means of an axially displaceable separable control rod concentrically disposed in the work spindle, and a clamping device for clamping the tool head to the work spindle of the nc machine, the improvement wherein said tool head includes a clamping device having a cone shaped end adapted to be inserted in a matingly shaped conical bore of the work spindle whereby said tool head is adapted to be interchangeable with respect to said work spindle, said work spindle having an axially displaceable tie rod disposed therein and concentrically surround the control rod, a releasable clutch operably associated with the separable control rod comprises ball locking means adapted to be released and locked by axial relative movements between said tie rod and said control rod and adapted to be moved into and out of engagement by axial relative movements whereby said clamping device is automatically releasable and the control is automatically separable by said releasable clutch to interchange the tool head, said control rod being operatively connected to said surface slide by inclined teeth, a stop member is adjustable in a radial direction by a second separable control rod which is disposed within said first control rod and automatically separable by a second releasable clutch.