Radial milling head

Abstract

The present invention relates to a radial milling head, in particular for thread milling, comprising a casing, a plurality of peripherally spaced rollers which are equidistantly arranged about a center axis of said casing and which are rotatably supported in said casing, a gear wheel each secured to a respective roller, a central gear wheel mashing with said roller gear wheels, said rollers including a peripheral working surface, having a diameter spirally increasing for working the workpiece, a locking means including a spring biased locking member and a release means for releasing said locking member to initianally rotate said rollers into frictional engagement with the workpiece by a rotational movement of said spring biased locking member, whereupon said rollers are further rotated by frictional engagement with said workpiece until the locking member and said rollers are locked again after having performed a full rotation. According to the invention a trip member is provided which is slidably arranged concentrically with respect to said center axis of said casing, said trip member cooperating through a linkage mechanism with said release member to initiate a full rotation of said rollers, when said trip member is axially displaced by a workpiece entering between said rollers. The present invention provides for an automatical release of the working cycle, when a workpiece enters the milling head, as the release mechanism is actuated by the workpiece through a linkage mechanism.

Dependencies are inferred from the claim text.