Automatic machine for milling drill points on rod blanks

摘要

A machine for milling a drill point on the end of a screw blank has a rotary conveyor with a plurality of clamps positioned radially around the periphery of said conveyor. A stationary cam is formed around the center about which the rotary conveyor turns. A number of cam followers are mounted on the conveyor for opening and closing the clamps as a function of their instantaneous positions in the excursion of the rotary conveyor. At the discharge end of the rotary excursion, a blast of air topples the screw blank head first off the conveyor to protect the tip end from damage.