Electrical machining device and method, hybrid machining system and method
AssigneeGeneral Electric Company
InventorsDong Liu, Andrew Lee Trimmer, Yuanfeng Luo, Steven Robert Hayashi
Life of this patent
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Abstract
An electrical machining method comprises machining a workpiece by an electrical machining device comprising an electrode; increasing a feedrate of the electrode at a first acceleration if a discharge current passing through the electrode and the workpiece is lower than a discharge current reference; and decreasing the feedrate of the electrode at a second acceleration if the discharge current is higher than the discharge current reference, wherein the second acceleration has an absolute value higher than that of the first acceleration.
Claims20
An electrical machining method comprising:
- machining a workpiece by an electrical machining device comprising an electrode;
- operating the electrical machine such that a discharge current is lower than a discharge current reference;
- operating the electrical machine such that the discharge current is higher than the discharge current reference;
- increasing a feedrate of the electrode towards the workpiece at a first acceleration when the discharge current passing through the electrode and the workpiece is lower than the discharge current reference;
- and
- decreasing the feedrate of the electrode towards the workpiece at a second acceleration when the discharge current is higher than the discharge current reference, wherein the second acceleration has an absolute value higher than that of the first acceleration.
An electrical machining device comprising:
- an electrode for machining a workpiece;
- and
- a feedrate regulator for increasing a feedrate of the electrode towards the workpiece at a first acceleration if a discharge current passing through the electrode and the workpiece is lower than a discharge current reference, and decreasing the feedrate of the electrode towards the workpiece at a second acceleration if the discharge current is higher than the discharge current reference, wherein the second acceleration has an absolute value higher than that of the first acceleration.
A hybrid machining system, comprising:
- a cutter for machining a workpiece in a first mode;
- an electrode for machining the workpiece in a second mode;
- and
- a hybrid controller for controlling the cutter to machine the workpiece in the first mode, increasing a feedrate of the electrode towards the workpiece at a first acceleration in the second mode if a discharge current passing through the electrode and the workpiece is lower than a discharge current reference, and decreasing the feedrate of the electrode towards the workpiece at a second acceleration in the second mode if the discharge current is higher than the discharge current reference, wherein the second acceleration has an absolute value higher than that of the first acceleration.
A machining method using a hybrid machining system comprising a cutter, an electrode and a toolholder, the method comprising:
- operating the system in a first mode comprising:
- holding the cutter with the toolholder, and machining a workpiece with the cutter;
- and
- operating the system in a second mode comprising:
- holding the electrode with the toolholder, machining the workpiece with the electrode,
- operating the system such that a discharge current is lower than a discharge current reference;
- and
- operating the system such that the discharge current is higher than the discharge current reference;
- increasing a feedrate of the electrode towards the workpiece at a first acceleration when the discharge current passing through the electrode and the workpiece is lower than the discharge current reference, and
- decreasing the feedrate of the electrode towards the workpiece at a second acceleration when the discharge current is higher than the discharge current reference, wherein the second acceleration has an absolute value higher than that of the first acceleration.
Dependencies are inferred from the claim text.