Piston rod manufacturing method
A piston rod manufacturing method of manufacturing a piston rod by joining a solid rod main body and a solid rod head includes a first step of joining respective end surfaces of the rod main body and the rod head by friction welding; and a second step of performing boring process on an axial center portion from the rod head side so as to penetrate through a joining face between the rod main body and the rod head.
1. A piston rod manufacturing method of manufacturing a piston rod by joining a solid rod main body and a rod head having an annular clevis connected to a load and a solid body portion, comprising:
a first step of joining an end surface of the rod main body and an end surface of the body portion of the rod head at a joining face by friction welding; and
a second step of performing a boring process on an axial center portion from the rod head side so as to form a hole that penetrates from the rod head side through the clevis and the joining face and into the rod main body; wherein the second step is performed after the first step.
2. The piston rod manufacturing method according to claim 1 , further comprising
a third step of sealing at least one of respective holes formed in the clevis and in the body portion in the second step with a sealing member.
3. The piston rod manufacturing method according to claim 1 , further comprising
a step of performing a quality inspection by means of a nondestructive test on a friction-welded portion between the rod main body and the rod head after the first step and before the second step.