Machining apparatus for noncircular shapes
AssigneeOkuma Corporation
InventorKoji Eba
Life of this patent
Estimating the term…
Abstract
In a noncircular shape machining apparatus, a tool 7 is moved reciprocally in an X-axis direction by a tool-moving mechanism. A first acceleration sensor 6 is disposed on a saddle 11, which is an immovable section of the tool-moving mechanism. Further, a second acceleration sensor 15 is disposed on a spindle bearing 5 of a spindle that holds and causes a workpiece 1 to rotate. Additionally, displacements of the saddle 11 and the workpiece 1 are measured by these two acceleration sensors 6 and 15, and displacement in the relative distance between the workpiece 1 and the tool 7 is acquired as relative displacement on the basis of the two displacements that have been obtained. Additionally, the position of the tool 7 is calculated from the obtained displacement and the output value of an X-axis linear scale 12.
Claims7
A noncircular shape machining apparatus that controls the movement of a tool tat is synchronized with the rotation of a workpiece to be machined into a noncircular shape, the apparatus comprising:
- a tool-moving mechanism that causes the tool to move rectilinearly, the tool-moving mechanism being disposed with a movable section that is capable of moving and an immovable section that is incapable of moving;
- first detecting means that detects displacement of the immovable section in a predetermined vector direction that causes the distance between the workpiece and the tool to change;
- second detecting means that acquires displacement of the workpiece held by a holding member in a predetermined vector direction that causes the distance between the workpiece and the tool to change;
- relative displacement calculating means that calculates, from the displacement of the immovable section and the displacement of the workpiece that have been detected, displacement between the immovable section and the workpiece as relative displacement;
- tool position detecting means that detects movement of the tool resulting from the tool-moving mechanism;
- and
- means that calculates the actual position of the tool with respect to the workpiece on the basis of the movement of the tool and the relative displacement.
A noncircular shape machining apparatus that controls the movement of a tool that is synchronized with the rotation of a workpiece to be machined into a non circular shape, the apparatus comprising:
- a tool-moving mechanism that causes the tool to move rectilinearly in a first axis, the tool-moving mechanism being disposed with a movable section that is capable of moving in the first axis and a fixed section that is fixed in the first axis;
- a first detecting means that detects displacement of the fixed section in a predetermined vector direction that causes the distance between the workpiece and the tool to change;
- a second detecting means that acquires displacement of the workpiece held by a holding member in a predetermined vector direction that causes the distance between the workpiece and the tool to change;
- a relative displacement calculating means that calculates, from the displacement of the fixed section and the displacement of the workpiece that have been detected, displacement between the fixed section and the workpiece as relative displacement;
- a tool position detecting means that detects movement of the tool resulting from the tool-moving mechanism;
- and
- a means That calculates the actual position of the tool with respect to the workpiece on the basis of the movement of the tool and The relative displacement.
Dependencies are inferred from the claim text.