Abstract: A thread rolling machine is disclosed wherein a continuously adjustable thread means is used to adjust the relative phase timing between two thread rolling dies and the feeding of a workpiece by the feed means. This timing substantially eliminates any mismatch of thead rolling by the two dies. A double ended thread rolling machine is also disclosed with timing of the two dies relative to the feed of a workpiece accomplished at one end of a workpiece and then the continuously adjustable thread means is used to adjust the relative phase timing of the thread rolling operation on the other end of the workpiece. The above description is merely one form of the invention and is not to be construed as limiting on the scope of the invention.

Abstract: A thread rolling machine is disclosed wherein a continuously adjustable timing screw is used to adjust the phase of the feed of a workpiece relative to the instantaneous position of a rotary die cooperating with a stationary die. This timing substantially eliminates any mismatch of thread rolling by the two dies. The rotatable timing screw adjusts the peripheral position of a cam follower relative to a feed cam by moving the fulcrum point of a bell crank lever on which the cam follower is carried. Rotation of the timing screw adjusts the peripheral position of the cam follower relative to the feed cam. The above description is merely one form of the invention and is not to be construed as limiting on the scope of the invention.

Abstract: A machine is provided to straighten both the stem and the head of flanged stem workpieces such as poppet valves by rolling the stem of the workpiece between a rotary die and an arcuate stationary die. The flange of the workpiece being larger than the stem overlaps the rotary second die to have a first path of a contact portion of the flange. A straightening roller is journalled for orbiting movement on a rotary straightening member and the straightening roller has a contact area movable in a second path intersecting the first path to engage the flange and bend the workpiece cyclically. This bending effects a straightening of such flange. The above description is merely one form of the invention and is not to be construed as limiting on the scope of the invention.