| 主权项 |
1. A shot processing apparatus comprising:
a cylindrical drum opening at one end and having a bottom at the other end; and a centrifugal projector, placed at the opening side of the drum, for projecting projection material onto a workpiece loaded into the drum; wherein the projector comprises:
a cylindrical control cage into which projection material is supplied, on the side wall of which an opening window is formed to serve as a discharge opening for the projection material and the opening window has a rectangular shape including two side parallel to the center axis line of the control cage;and a blade wheel, wherein the blade wheel includes:
at least one side plate;a plurality of blades attached to the side plate so as to extend radially outwardly of the control cage outside of the control cage;a rotary axis for rotating the side plate and the plurality of blades; andan introducing part for introducing the projection material between the plurality of blades; wherein the blade includes a projection surface for projecting the projection material, and the projection surface has a first part being a radially inner part of the blade and a second part being a radially outer part of the blade; the first part of the blade is formed so as to be inclined such that a radially outer side of the first part is rearwardly positioned in a rotational direction compared to a radially inner side of the first part, and the second part of the blade is formed to be positioned frontwardly of an imaginary line in the rotational direction, which imaginary line is defined by extending the first part of the blade in the radially outward direction, wherein the blade has a blade projection portion on which the projection surface for projecting the projection material is formed, and an attachment portion being formed thicker than the blade projection portion at both edge portions of the blade projection portion and integrally formed with the blade projection portion; wherein the attachment portion is formed in a straight shape at least in a plane perpendicular to the rotary shaft direction of the blade in its outer part and has a locking portion formed such that a plane perpendicular to the direction of the rotary shaft in the radial inner part thereof is formed so as to project from the straight shape; a side plate unit for attaching the plurality of blades thereto; wherein the side plate unit includes a pair of side plates having at least the one side plate, and a connecting member for connecting the pair of side plates; guide channel portions are respectively formed on mutually opposing surfaces of the pair of the side plates in the side plate unit; and the side plate guide channel portions are formed to be inclined such that the radial outer side thereof is positioned rearwardly of the radial inner side thereof in the rotational direction; wherein the side plate unit is attached to the rotary shaft by a bolt, and a recessed portion for attaching the bolt is provided in the guide channel portion of the side plate of the side plate unit. |
