US 2023/0347428 A1Published application

Tool and machining device and method of machining

AssigneeNidec Machine Tool Corporation

InventorsTatsuro TAKAGI, Govinda PARASRAMPURIA

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Abstract

A tool includes a tool body extending along a tool axis, and a thread protruding in a direction away from the tool axis on an outer surface of the tool body and provided in a spiral shape about the tool axis. The thread includes a first region located on one side in a spiral direction and a reference region located on another side in the spiral direction with respect to the first region. The first region includes a one-side tooth flank that is a surface on one side in a tool axial direction and an other-side tooth flank that is a surface on the other side in the tool axial direction. The reference region includes a one-side tooth flank that is a surface on one side in the tool axial direction and another-side tooth flank that is a surface on the other side in the tool axial direction.

Claims20

Dependent claims

A tool comprising:

a tool body extending along a tool axis;
and
a thread protruding in a direction away from the tool axis on an outer surface of the tool body and provided in a spiral shape about the tool axis;
wherein
the thread includes:
a first region located on one side in a spiral direction;
and
a reference region located on another side in the spiral direction with respect to the first region;
the first region includes:
a one-side tooth flank that is a surface on one side in a tool axial direction;
and
another-side tooth flank that is a surface on another side in the tool axial direction;
the reference region includes:
a one-side tooth flank that is a surface on one side in the tool axial direction;
and
another-side tooth flank that is a surface on another side in the tool axial direction;
in at least one of the one-side tooth flank and the another-side tooth flank in a tooth profile of the reference region, an angle between an inner region located on a tool axis side and the outer surface of the tool body is smaller than an angle between an outer region located in a direction farther from the tool axis than the inner region and an outer surface of the tool body;
and
the other-side tooth flank in the first region is recessed more than the another-side tooth flank in the reference region.

16 more elements

A machining device for machining a gear, the machining device comprising:

a tool;
a tool driver that rotates the tool about a tool axis;
and
a gear driver that rotates the gear about a gear axis disposed non-parallel to the tool axis;
wherein
the tool includes:
a tool body extending along the tool axis;
and
a thread protruding in a direction away from the tool axis on an outer surface of the tool body and provided in a spiral shape about the tool axis;
the thread includes a first region and a second region located at different positions along the spiral shape;
the thread includes:
a right tooth flank that is a surface on one side in a tool axial direction;
and
a left tooth flank that is a surface on another side in the tool axial direction;
the gear includes a plurality of teeth;
the machining device includes at least one machining configuration including:
a machining configuration in which the right tooth flank of the first region machines a tooth bottom portion of a surface of the tooth on one side in a circumferential direction of the gear axis, and the right tooth flank of the second region machines a tooth tip side of the surface of the tooth on one side in the circumferential direction of the gear axis with respect to the tooth bottom portion;
and
a machining configuration in which the left tooth flank of the first region machines a tooth tip portion of a surface of the tooth on another side in the circumferential direction of the gear axis, and the left tooth flank of the second region machines a tooth bottom side of a surface of the tooth on the other side in the circumferential direction of the gear axis with respect to the tooth tip portion;
and
the thread includes at least one of a tool configuration including:
a tool configuration in which a tooth profile of the first region is recessed more than a tooth profile of the second region on the left tooth flank;
and
a tool configuration in which a tooth profile of the second region is recessed more than a tooth profile of the first region on the right tooth flank.

21 more elements

A method of machining a gear with a machining device including:

a tool;
a tool driver that rotates the tool about a tool axis;
and
a gear driver that rotates the gear about a gear axis disposed non-parallel to the tool axis;
wherein
the tool includes:
a tool body extending along the tool axis;
and
a thread protruding in a direction away from the tool axis on an outer surface of the tool body and provided in a spiral shape about the tool axis;
the thread includes a first region and a second region located at different positions along the spiral shape;
the thread includes:
a right tooth flank that is a surface on one side in a tool axial direction;
and
a left tooth flank that is a surface on another side in the tool axial direction;
the gear includes a plurality of teeth;
the machining method comprising:
performing at least one of:
machining a tooth bottom portion of a surface of the tooth on one side in a circumferential direction of the gear axis configuration with the right tooth flank of the first region, and machining a tooth tip side of the surface of the tooth on one side in the circumferential direction of the gear axis with respect to the tooth bottom portion with the right tooth flank of the second region;
and
machining a tooth tip portion of a surface of the tooth on another side in the circumferential direction of the gear axis with the left tooth flank of the first region machines, and machining a tooth bottom side of a surface of the tooth on the other side in the circumferential direction of the gear axis with respect to the tooth tip portion with the left tooth flank of the second region;
performing machining the tooth bottom portion of the surface of the tooth on one side in the circumferential direction of the gear axis with the right tooth flank of the first region, and machining a tooth tip side of a surface of the tooth on the one side in the circumferential direction of the gear axis with respect to the tooth bottom portion with the right tooth flank of the second region;
and
performing machining a tooth tip portion of a surface of the tooth on another side in the circumferential direction of the gear axis with the left tooth flank of the first region, and machining a tooth bottom side of a surface of the tooth on the other side in the circumferential direction of the gear axis with respect to the tooth tip portion with the left tooth flank of the second region;
wherein
the thread includes at least one of a tool configuration including:
a tool configuration in which a tooth profile of the first region is recessed more than a tooth profile of the second region on the left tooth flank;
and
a tool configuration in which a tooth profile of the second region is recessed more than a tooth profile of the first region on the right tooth flank.

25 more elements

Dependencies are inferred from the claim text.