Center shaft machining apparatus
AssigneeHonda Motor Co., Ltd.
InventorsShinya Hamamatsu, Kazunari Inamori
Life of this patent
Estimating the term…
Abstract
A center shaft machining apparatus includes: a grinding structure that moves on a machining central axis while rotating about the machining central axis and machines an end surface on one end side of a workpiece arranged on the machining central axis; an end portion support structure that supports an opposite end side of the workpiece; and a shaft portion support structure that supports a shaft support portion set at an intermediate portion of the workpiece. The end portion support structure includes an eccentric mechanism capable of supporting an opposite end of the workpiece in a state where a workpiece central axis of the workpiece is eccentric with respect to the machining central axis.
Claims6
A center shaft machining apparatus for re-machining a shaft workpiece formed as a rotating body centered around a workpiece central axis, the shaft workpiece including:
- a first end portion having a first opening,
- a second end portion opposite to the first end portion, and having a second opening,
- an intermediate portion located between the first end portion and the second end portion, the first end portion, the second end portion, and the intermediate portion being located along the workpiece central axis,
- wherein the shaft workpiece includes a distortion with respect to the workpiece central axis such that a center of the first opening does not coincide with a center of the second opening,
- the center shaft machining apparatus comprising:
- a grinding structure that moves along a machining central axis while rotating about the machining central axis and machines an end surface that defines the first opening of the first end portion of the shaft workpiece to form a machined first opening, the shaft workpiece being supported along the machining central axis;
- an end support structure that supports the second end portion of the shaft workpiece;
- and
- an intermediate support structure that rotatably supports the intermediate portion of the shaft workpiece such that the workpiece central axis of the shaft workpiece coincides with or intersects the machining central axis, wherein
- the end support structure includes an eccentric mechanism capable of supporting the second end portion of the shaft workpiece in a state where the workpiece central axis is eccentric with respect to the machining central axis by an eccentric amount based on the distortion of the shaft workpiece with respect to the workpiece central axis, and a rotating unit that rotates the eccentric mechanism about the machining central axis, and
- wherein a straight line connecting a center of the machined first opening and the center of the second opening is reconstructed as a new workpiece central axis.
A center shaft machining apparatus for re-machining a shaft workpiece formed as a rotating body centered around a workpiece central axis, the shaft workpiece including:
- a first end portion having a first opening,
- a second end portion opposite to the first end portion, and having a second opening,
- an intermediate portion located between the first end portion and the second end portion, the first end portion, the second end portion, and the intermediate portion being located along the workpiece central axis,
- wherein the shaft workpiece includes a distortion with respect to the workpiece central axis such that a center of the first opening does not coincide with a center of the second opening,
- the center shaft machining apparatus comprising:
- a grinding structure that moves along a machining central axis while rotating about the machining central axis and machines an end surface that defines the first opening of the first end portion of the shaft workpiece to form a machined first opening, the shaft workpiece being supported along the machining central axis;
- an end support structure that supports the second end portion of the shaft workpiece;
- and
- an intermediate support structure that rotatably supports the intermediate portion of the shaft workpiece such that the workpiece central axis of the shaft workpiece coincides with or intersects the machining central axis, wherein
- the end support structure includes an eccentric mechanism capable of supporting the second end portion of the shaft workpiece in a state where the workpiece central axis is eccentric with respect to the machining central axis by an eccentric amount based on the distortion of the shaft workpiece with respect to the workpiece central axis, and a rotating unit that rotates the eccentric mechanism about the machining central axis,
- wherein a straight line connecting a center of the machined first opening and the center of the second opening is reconstructed as a new workpiece central axis, and
- the grinding structure includes:
- an AE sensor that detects sound and vibration during grinding machining;
- and
- a determination control unit that determines a grinding state from an output signal of the AE sensor.
Dependencies are inferred from the claim text.