ELECTRIC PRESS MACHINE HAVING LOAD CELL WITHIN TO PREVENT DAMAGE OF LOAD CELL BY PREVENTING NON-AXIAL LOAD FROM BEING APPLIED TO LOAD CELL

摘要

PURPOSE: An electric press machine having a load cell within is provided to prevent the load cell from being damaged and deformed by non-axial load, and perform precise load control. CONSTITUTION: A servo motor(40) is mounted to the bottom of one side of a base plate(80), and has an output shaft(41) on which a driving timing pulley(45) is installed. A load cell(20) is mounted to the bottom of the other side of the base plate. A pipe-shaped press body(10) is fixed to the bottom of the load cell to conform to the load cell in the center line. Upper and lower thrust bearings(5) are inserted into a bearing housing, and adhere closely to the top and bottom of the load cell. A ball screw bolt(30) has a lower screw, and an upper support unit. The inner ring of the lower thrust bearing adheres closely to a support end between the lower screw and the support unit. A driven timing pulley(25) adheres closely to the inner ring of the upper thrust bearing. A ball screw nut(35) is engaged with the screw of the ball screw bolt. A pressing rod(50) is coupled to the ball screw nut, and moves up and down simultaneously with the ball screw nut.