FRICTION DRIVE APPARATUS BY BALL SCREW IN ROTARY FRICTION WELDING MACHINE

摘要

A friction drive apparatus by a ball screw in a rotary friction welding machine relates to the improvement of a friction drive apparatus in a friction welding machine. The apparatus characters in that a motor is directly connected with a ball screw through a coupling, and a nut is mounted on the thrust base which sliding fit with a base. And both the thrust base and a clamp are mounted on a movable-sliding table. Moreover, the ball screw is fixed with a motor base by bearings, and the front end of the thrust base is fixed with mandrels. The advantages of the invention are as following: simple construction, easily to be made and decreased cost. Replacing hydraulic ram with servo controller can precisely control the axial force, the speed of response and advance displacement for force. As a result, the invention can be obtained closed-loop control of speed, closed-loop control of torque and closed-loop control of displacement in motor, realizing higher precision and better quality of friction welding.