A hollow shaft includes a cylindrical main body part and an extremity drawn part that is integrally connected to one end of the main body part on the same axis and whose diameter is made smaller than a diameter of the main body part by drawing processing, wherein an inner peripheral face of the main body part and an inner peripheral face of a base portion, which is continuous with one end side of the main body part, of the extremity drawn part are formed as cut faces that are subjected to cutting processing before the drawing processing, and an inner peripheral face of a tip portion, which is continuous with an extremity side of the base portion, of the extremity drawn part is a non-cut face. Accordingly, the hollow shaft can be molded with high shape precision while maintaining a low drawing ratio for an extremity drawn part.

A hollow shaft includes a cylindrical main body part and an extremity drawn part that is integrally connected to one end of the main body part on the same axis and whose diameter is made smaller than a diameter of the main body part by drawing processing, wherein an inner peripheral face of the main body part and an inner peripheral face of a base portion, which is continuous with one end side of the main body part, of the extremity drawn part are formed as cut faces that are subjected to cutting processing before the drawing processing, and an inner peripheral face of a tip portion, which is continuous with an extremity side of the base portion, of the extremity drawn part is a non-cut face. Accordingly, the hollow shaft can be molded with high shape precision while maintaining a low drawing ratio for an extremity drawn part.

A manufacturing method, a manufacturing apparatus, a computer readable recording medium, and a program for manufacturing a machine component having a rotation symmetry plane are provided. According to one embodiment, the manufacturing method includes positioning a linear cutting edge (2A) inclined at an angle greater than 0 and smaller than 90 with respect to a Z axis at a cutting start position displaced from a position on an X axis along a direction of a Y axis in a three-dimensional orthogonal coordinate system in which an axial line of rotation of a rotation symmetry plane (1A) is defined as the Z axis, an axis in a radial direction of the rotation symmetry plane is defined as the X axis, and an axis orthogonal to both of the Z axis and the X axis is defined as the Y axis and machining the rotation symmetry plane (1A) by feeding the cutting edge (2A) from the cutting start position along a track having an X axis component, a Y axis component, and a Z axis component while the cutting edge is in contact with a rotating machine component (1).

A manufacturing method, a manufacturing apparatus, a computer readable recording medium, and a program for manufacturing a machine component having a rotation symmetry plane are provided. According to one embodiment, the manufacturing method includes positioning a linear cutting edge (2A) inclined at an angle greater than 0 and smaller than 90 with respect to a Z axis at a cutting start position displaced from a position on an X axis along a direction of a Y axis in a three-dimensional orthogonal coordinate system in which an axial line of rotation of a rotation symmetry plane (1A) is defined as the Z axis, an axis in a radial direction of the rotation symmetry plane is defined as the X axis, and an axis orthogonal to both of the Z axis and the X axis is defined as the Y axis and machining the rotation symmetry plane (1A) by feeding the cutting edge (2A) from the cutting start position along a track having an X axis component, a Y axis component, and a Z axis component while the cutting edge is in contact with a rotating machine component (1).

A manufacturing method, a manufacturing apparatus, a computer readable recording medium, and a program for manufacturing a machine component having a rotation symmetry plane are provided. According to one embodiment, the manufacturing method includes positioning a linear cutting edge (2A) inclined at an angle greater than 0 and smaller than 90 with respect to a Z axis at a cutting start position displaced from a position on an X axis along a direction of a Y axis in a three-dimensional orthogonal coordinate system in which an axial line of rotation of a rotation symmetry plane (1A) is defined as the Z axis, an axis in a radial direction of the rotation symmetry plane is defined as the X axis, and an axis orthogonal to both of the Z axis and the X axis is defined as the Y axis and machining the rotation symmetry plane (1A) by feeding the cutting edge (2A) from the cutting start position along a track having an X axis component, a Y axis component, and a Z axis component while the cutting edge is in contact with a rotating machine component (1).

A manufacturing method, a manufacturing apparatus, a computer readable recording medium, and a program for manufacturing a machine component having a rotation symmetry plane are provided. According to one embodiment, the manufacturing method includes positioning a linear cutting edge (2A) inclined at an angle greater than 0 and smaller than 90 with respect to a Z axis at a cutting start position displaced from a position on an X axis along a direction of a Y axis in a three-dimensional orthogonal coordinate system in which an axial line of rotation of a rotation symmetry plane (1A) is defined as the Z axis, an axis in a radial direction of the rotation symmetry plane is defined as the X axis, and an axis orthogonal to both of the Z axis and the X axis is defined as the Y axis and machining the rotation symmetry plane (1A) by feeding the cutting edge (2A) from the cutting start position along a track having an X axis component, a Y axis component, and a Z axis component while the cutting edge is in contact with a rotating machine component (1).

A method includes positioning a linear cutting edge inclined at an angle greater than 0 and smaller than 90 with respect to a Z axis at a cutting start position displaced from a position on an X axis along a direction of a Y axis in a three-dimensional orthogonal coordinate system in which an axial line of rotation of a rotation symmetry plane is defined as the Z axis, an axis in a radial direction of the rotation symmetry plane is defined as the X axis, and an axis orthogonal to both of the Z axis and the X axis is defined as the Y axis and machining the rotation symmetry plane by feeding the cutting edge from the cutting start position along a track having an X axis component, a Y axis component, and a Z axis component while the cutting edge is in contact with a rotating machine component.

A method includes positioning a linear cutting edge inclined at an angle greater than 0 and smaller than 90 with respect to a Z axis at a cutting start position displaced from a position on an X axis along a direction of a Y axis in a three-dimensional orthogonal coordinate system in which an axial line of rotation of a rotation symmetry plane is defined as the Z axis, an axis in a radial direction of the rotation symmetry plane is defined as the X axis, and an axis orthogonal to both of the Z axis and the X axis is defined as the Y axis and machining the rotation symmetry plane by feeding the cutting edge from the cutting start position along a track having an X axis component, a Y axis component, and a Z axis component while the cutting edge is in contact with a rotating machine component.

A machine tool for cutting a workpiece having an inclined surface includes a main spindle that rotates while holding the workpiece, a tool post that holds a cutting tool to cut the inclined surface of the workpiece, a mover that relatively moves the workpiece and the cutting tool in a direction including at least a Y-direction perpendicular to both a Z-direction parallel to an axis of the main spindle and an X-direction that is perpendicular to the Z-direction and determines the amount of cutting of the workpiece. The mover includes a Y-direction guide disposed on the tool post, the Y-direction guide guiding movement of the cutting tool in the Y-direction, and the Y-direction guide has a guide surface along a surface perpendicular to a direction of a thrust force that occurs when cutting the inclined surface using the cutting tool.

A machine tool for cutting a workpiece having an inclined surface includes a main spindle that rotates while holding the workpiece, a tool post that holds a cutting tool to cut the inclined surface of the workpiece, a mover that relatively moves the workpiece and the cutting tool in a direction including at least a Y-direction perpendicular to both a Z-direction parallel to an axis of the main spindle and an X-direction that is perpendicular to the Z-direction and determines the amount of cutting of the workpiece. The mover includes a Y-direction guide disposed on the tool post, the Y-direction guide guiding movement of the cutting tool in the Y-direction, and the Y-direction guide has a guide surface along a surface perpendicular to a direction of a thrust force that occurs when cutting the inclined surface using the cutting tool.