PRESS WORKING METHOD AND MANUFACTURING METHOD FOR MACHINERY

摘要

A pressing method capable of increasing processing accuracy with respect to a workpiece is realized.;A method of performing pressing on a workpiece 11 using a press machine 1 including: a frame 2 having the reference axis, a lower die 6 supported by the frame 2, an upper die 7 supported by the frame 2 so as to enable retreating and approaching movement with respect to the lower die 6 in an axial direction of a reference axis C, and a hydraulic cylinder 5 configured to generate a force in a direction in which the upper die 7 approaches the lower die 6, the pressing method including: performing the pressing on the workpiece between the lower die and the upper die by causing the upper die 7 to approach the lower die 6 by using the hydraulic cylinder 5 in a state in which the workpiece 11 is disposed between the lower die 6 and the upper die 7, and performing the pressing on the workpiece 11 between the lower die 6 and the upper die 7, performing the pressing on the workpiece 11 in a state in which a shape of each of the frame 2, the lower die 6 and the upper die 7 has a rotationally symmetric shape about the reference axis C and in which the workpiece center axis coincides with the reference axis C.