Abstract: A shot processing apparatus according to an aspect includes: a projector; a set table configured to support the workpiece from below and be rotatable about an axis; a retaining mechanism including a retainer opposed to the set table with the workpiece interposed, the retainer being configured to be rotatable about the axis and movable in a direction of the axis; a rotational force driver configured to apply rotational force to the retainer through a transmission mechanism; and a lifting mechanism including a pressing holder capable of being lifted and lowered above the retaining mechanism, the lifting mechanism being at a distance from the retaining mechanism when the pressing holder is located above a reference height, the lifting mechanism applying pressing force to the workpiece through the retainer when the pressing holder is located below the reference height.

Abstract: A shot processing apparatus according to an aspect includes: a projector; a set table configured to support the workpiece from below and be rotatable about an axis; a retaining mechanism including a retainer opposed to the set table with the workpiece interposed, the retainer being configured to be rotatable about the axis and movable in a direction of the axis; a rotational force driver configured to apply rotational force to the retainer through a transmission mechanism; and a lifting mechanism including a pressing holder capable of being lifted and lowered above the retaining mechanism, the lifting mechanism being at a distance from the retaining mechanism when the pressing holder is located above a reference height, the lifting mechanism applying pressing force to the workpiece through the retainer when the pressing holder is located below the reference height.

Abstract: Disclosed herein is a surface treatment machine that enables the inhibition or reduction of residual abrasives that remain on a workpiece that has been surface treated. An H steel (a workpiece to be treated) 12 is conveyed by means of a conveying device 20. Blasting devices 24A, 24B are then projected abrasives on to the conveying H steel such that it is surface treated. In the downstream of the blasting devices 24A, 24B along the conveying direction, a blowing port 30A of an air blower 30 is located above a conveying path to blow gas to the upper surface 112A of the H steel 12 such that the abrasives on the H steel 12 are blown off and removed therefrom.

Abstract: Disclosed herein is a surface treatment machine that enables the inhibition or reduction of residual abrasives that remain on a workpiece that has been surface treated. An H steel (a workpiece to be treated) 12 is conveyed by means of a conveying device 20. Blasting devices 24A, 24B are then projected abrasives on to the conveying H steel such that it is surface treated. In the downstream of the blasting devices 24A, 24B along the conveying direction, a blowing port 30A of an air blower 30 is located above a conveying path to blow gas to the upper surface 112A of the H steel 12 such that the abrasives on the H steel 12 are blown off and removed therefrom.

Abstract: Disclosed is a compact shot-treatment machine that enables the quality of a shot treatment for a workpiece to be enhanced, having a tubular portion, without generating dents on the workpiece. The shot-treatment machine comprises a jig 1 having a plurality of axial members 22, each axial member to be passed completely through each tubular portion of one or more workpieces W for holding them, and is detachably mounted on the jig; an enclosure 2 for defining a projection chamber therein; a supporting means 3 for rotatably holding the jig 1 in the projection chamber; a projection device 7 for projecting shots to the workpieces W in the projection chamber; and a circulating mechanism 8 for collecting the shots projected from the projection device 7 and supplying them to the projection device 7.