US 4,066,380 A · Combined boring and threading tool

Abstract

The invention relates to a threading tool for internal threads with a cutter holder which is displaceably mounted on a cutter holder carrier shaft co-axial to the main axis of the rotatable tool which coincides with the thread axis during the cutting process, whereby the said cutter holder shaft is moved forwards and backwards periodically with the forward feed corresponding to the thread pitch in the direction of the main axis in the thread chasing operation by a cam control with a camshaft co-axial to the cutter holder shaft and rotating with a differential speed relative thereto, whereby through a corresponding radial displacement of the cutter holder the cutter is raised during return travel and in the thread chasing operation is set to engage lower and lower from one thread chasing operation to the next up to the final cutting depth.

Claims12

Dependent claims

A threading tool comprising a rotatable body, a cutter holder carrier mounted with means for axially displaceable conjoint rotation with said rotatable body, a cutter holder mounted with means for radial displacement on said carrier, first cam actuated means for producing axial displacement of said carrier relative to said body, second cam actuated means for producing radial displacement of said cutter holder relative to said carrier, cam actuating means adapted to actuate said first and second cam actuated means, and interengaging cam means between said cam actuated and cam actuating means formed to provide sequential radial displacement of said cutter holder preparatory to a thread chasing operation followed by axial displacement of said carrier at a rate per revolution based on the required thread pitch during rotation of said body.

Dependencies are inferred from the claim text.

Combined boring and threading tool

Life of this patent

Combined boring and threading tool

Life of this patent

Abstract

Claims12