Machining apparatus and machining method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHiroki Nonaka
Life of this patent
Estimating the term…
Abstract
A machining device (6) for machining a workpiece by relatively rotating the workpiece and a tool (1) which comprises a revolving shaft (8) held for rotation on its own axis that is parallel with the center axis, a main shaft (4) that is eccentric with respect to the center axis of the revolving shaft (8) and that rotates on its own axis that is parallel with the center axis of the revolving shaft (8), the main shaft having either the workpiece or the tool (1) mounted on the front end thereof, and rotation drive mechanisms (M1, M3) for rotating the revolving shaft (8) and main shaft (4) at different rpm's.
Claims12
A machining apparatus for machining a workpiece by relatively rotating the workpiece and a tool, comprising:
- a revolution shaft held to rotate on an axis parallel to a center axis of the machining apparatus,
- a spindle rotating on an axis which is offset with respect to the center axis of the revolution shaft and parallel to a center axis of the revolution shaft and having a leading end on which one of the workpiece and the tool is mounted,
- a rotation driving mechanism for transmitting a power through a rotating member on a center axis of rotation of the revolution shaft or a member rotating integrally with the revolution shaft to the spindle to rotate the same, while rotating the revolution shaft and the spindle at different speeds respectively.
A machining method for machining a workpiece by rotating and revolving one of the workpiece and a tool and simultaneously by contacting the one of the workpiece and the tool with the other of the workpiece and the tool, comprising:
- determining an amount of machining by the tool per unit time on the basis of at least one of a predetermined maximum machining sectional area and a predetermined machining speed,
- setting a ratio of a number of rotation of the workpiece or the tool to a number of revolution of the workpiece or the tool on the basis of the amount of machining per unit time, and
- machining the workpiece by rotating and revolving the workpiece or the tool so as to satisfy the ratio.
A machining method for rotating and revolving a tool having a cutting blade and intermittently cutting a workpiece by means of the tool,
- wherein the workpiece is intermittently cut by means of the cutting blade mounted on the tool by setting a ratio of a number of rotation of the tool to a number of revolution of the tool to a value below 37.
A machining method for rotating and revolving a tool having a cutting blade and intermittently cutting a workpiece by means of the tool,
- wherein the workpiece is cut by setting a ratio of a cutting speed depending on a revolution of the tool, as contained in a cutting speed of the cutting blade with respect to the workpiece obtained when the tool is rotated and revolved, to not less than 7%.
A machining method for machining a workpiece by rotating and revolving one of the workpiece and a tool and simultaneously contacting the one of the workpiece and the tool with the other of the workpiece and the tool,
- wherein the workpiece is cut by changing a ratio of a number of rotation of the one of the workpiece and the tool to a number of revolution of the other of the workpiece and the tool on the basis of a roughness produced on a machined surface of the workpiece.
A machining method for machining a workpiece by rotating and revolving one of the workpiece and a tool and simultaneously contacting the one of the workpiece and the tool with the other of the workpiece and the tool, and moving the one of the workpiece and the tool backward and forward in a direction parallel to a center axis of a rotation,
- wherein a ratio of a number of rotation to a number of revolution of the workpiece or the tool is made different between a machining step of moving one of the workpiece or the tool forward in a direction parallel to the center axis of rotation and a machining step of moving one of the workpiece or the tool backward in the direction parallel to the center axis of rotation.
Dependencies are inferred from the claim text.