An apparatus including a plurality of first and second pressing elements arranged in crown symmetrically around an axis of symmetry (B) so that a first end of a first pressing element cooperates in contact with a second end of a second pressing element; wherein the first and second pressing elements are supported slidingly and passing through by, respectively, a first and a second plate coupled and bound to each other, in respective second and first slits angularly spaced apart; the first pressing elements being provided with hammerheads circumferentially wider than the second slits and which cooperate circumferentially without play in contact with each other, and the second pressing elements being provided with engraving heads circumferentially wider than the first slits, which cooperate circumferentially without play in contact with each other.

Provided is construction which is able to downsize an orbital forging device comprising a spherical seat with shaft that swings and rotates with a molding die. The end section on the other side in the axial direction of the swinging shaft 13 is supported with respect to the driving mechanism 17 in a state where the movement toward one side in the axial direction (lower side) is prevented, and a member for preventing the swinging shaft 13 from moving toward the one side in the axial direction with respect to the frame 10 is not assembled in a section which is located between the convex spherical seat 14 and the driving mechanism 17 in the axial direction of the swinging shaft 13.

Provided is construction which is able to downsize an orbital forging device comprising a spherical seat with shaft that swings and rotates with a molding die. The end section on the other side in the axial direction of the swinging shaft 13 is supported with respect to the driving mechanism 17 in a state where the movement toward one side in the axial direction (lower side) is prevented, and a member for preventing the swinging shaft 13 from moving toward the one side in the axial direction with respect to the frame 10 is not assembled in a section which is located between the convex spherical seat 14 and the driving mechanism 17 in the axial direction of the swinging shaft 13.

Provided is construction which is able to downsize an orbital forging device comprising a spherical seat with shaft that swings and rotates with a molding die. The end section on the other side in the axial direction of the swinging shaft 13 is supported with respect to the driving mechanism 17 in a state where the movement toward one side in the axial direction (lower side) is prevented, and a member for preventing the swinging shaft 13 from moving toward the one side in the axial direction with respect to the frame 10 is not assembled in a section which is located between the convex spherical seat 14 and the driving mechanism 17 in the axial direction of the swinging shaft 13.

Provided is construction which is able to downsize an orbital forging device comprising a spherical seat with shaft that swings and rotates with a molding die. The end section on the other side in the axial direction of the swinging shaft 13 is supported with respect to the driving mechanism 17 in a state where the movement toward one side in the axial direction (lower side) is prevented, and a member for preventing the swinging shaft 13 from moving toward the one side in the axial direction with respect to the frame 10 is not assembled in a section which is located between the convex spherical seat 14 and the driving mechanism 17 in the axial direction of the swinging shaft 13.

The present disclosure discloses an automobile wheel hub shaping device. The automobile wheel hub shaping device includes a clamping part for clamping a wheel hub to be shaped, a first driving mechanism for driving the clamping part to rotate, a shaping roller for shaping the wheel hub to be shaped, and a rack; all the clamping part, the first driving mechanism and the shaping roller are mounted to the rack, the shaping roller is located above the clamping part and is capable of rotating relative to the clamping part; and the clamping part is equipped with a fixing part for fixing the wheel hub to be shaped.

The present disclosure discloses an automobile wheel hub shaping device. The automobile wheel hub shaping device includes a clamping part for clamping a wheel hub to be shaped, a first driving mechanism for driving the clamping part to rotate, a shaping roller for shaping the wheel hub to be shaped, and a rack; all the clamping part, the first driving mechanism and the shaping roller are mounted to the rack, the shaping roller is located above the clamping part and is capable of rotating relative to the clamping part; and the clamping part is equipped with a fixing part for fixing the wheel hub to be shaped.

Provided is a manufacturing method for a cylindrical portion in a cylindrical shape protruding in a plate thickness direction of a plate-like portion made of metal, the cylindrical portion being formed integrally with the plate-like portion. The manufacturing method uses a manufacturing device including: a first metal mold provided with an inner circumferential surface that comes in contact with an outer circumferential surface of the cylindrical portion; a second metal mold coming in contact with a protruding tip of the cylindrical portion; and a third metal mold coming into press contact with a workpiece toward a side of the second metal mold. The third metal mold is displaced toward the side of the second metal mold and a portion of the workpiece undergoes plastic flow toward the inner circumferential surface, whereby the portion that underwent the plastic flow comes into press contact with the inner circumferential surface.

Provided is a manufacturing method for a cylindrical portion in a cylindrical shape protruding in a plate thickness direction of a plate-like portion made of metal, the cylindrical portion being formed integrally with the plate-like portion. The manufacturing method uses a manufacturing device including: a first metal mold provided with an inner circumferential surface that comes in contact with an outer circumferential surface of the cylindrical portion; a second metal mold coming in contact with a protruding tip of the cylindrical portion; and a third metal mold coming into press contact with a workpiece toward a side of the second metal mold. The third metal mold is displaced toward the side of the second metal mold and a portion of the workpiece undergoes plastic flow toward the inner circumferential surface, whereby the portion that underwent the plastic flow comes into press contact with the inner circumferential surface.

The step being performed in a state where a wheel body is fixed to be prevented from rotating around a rotation axis while a cutting edge of a cutting tool is in contact with the three-dimensional shape surface of the design surface in the wheel body, the cutting tool being three-dimensionally and continuously moved relatively along the three-dimensional shape surface while being changed in direction with respect to the three-dimensional shape surface to allow a rake face of the cutting tool to face a tool travel direction to perform three-dimensional continuous cutting processing that allows a specular glossy surface to be automatically formed in the three-dimensional shape surface, the specular glossy surface being finished into a processed surface having a high metallic gloss property by exposing the base metal.