Automatic Super Finish Characterizations on Screw Surfaces

An effectively automotive control system of super finish module that employs an electrode connecting with a nonconductive grinding-tool as a finish-tool to execute the automatic continuity finish processes of grinding and pulsed electrofinishing (GPE) following thread cutting is developed in the current study. Through simple equipment attachment, the continuity finish processes can follow the cutting on the same machine and chuck. The results show that using an adequate rotational speed of the workpiece along with a high rotational speed of the finish-tool is advantageous to the finish effect. Pulsed direct current with a longer off-time can slightly improve the finish effect for its dregs discharge mobility. The design change of the finish-tool, from a full circumstance borer tip on the leading edge of the cylinder to a thin plate form on one side of the borer tip, causes the productspsila finish and heat brought away from the product to increase more rapidly and gives the best finish performance in the current investigation.