To make shot material uniformly collide with all over the inner circumferential surface of a pipe, and recover the shot material after the collision without leaving them in the pipe.
The shot peening device includes: a feed pipe 2 inserted into the pipe 102 from the opening at an end of the pipe 102; at least one jet hole 21 at the distal end of the feed pipe 2, directed outward of the circumference of the feed pipe 2; a rotating means 3 rotating the feed pipe 2 on an axis center R; a moving means 4 moving the feed pipe 2 along the axis center R; a shot material supply means 5 supplying the shot material into the feed pipe 2 and jetting it from the jet hole 21; a transfer means 6 helically provided on the outer circumference of the feed pipe 2 so as to transfer the jetted shot material to the proximal end side of the feed pipe 2, accompanied by the rotation of the feed pipe 2; and a recovery means 7 disposed at the opening portion of the pipe 102 so as to recover the shot material transferred by the transfer means 6.
AKAHA TAKASHI
FUJITA ATSUSHI
Jun Takamura