US 10,864,587 B2Granted

Wire electrical discharge machine and control method for wire electrical discharge machine

AssigneeFanuc Corporation

InventorTaiju Hashimoto

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Abstract

A wire electrical discharge machine machines a workpiece so as to have different machined shapes on a top surface and a bottom surface of the workpiece. The wire electrical discharge machine includes: a distance measuring sensor for moving within a machining area of the wire electrical discharge machine and measuring a distance between the distance measuring sensor and an object to be measured; and a vertical position calculating unit for calculating a distance between a reference surface and the top surface and a distance between the reference surface and the bottom surface, from a distance between the reference surface and the distance measuring sensor, a distance between the top surface and the distance measuring sensor, and a distance between the bottom surface and the distance measuring sensor, measured by the distance measuring sensor.

Claims9

Dependent claims

A wire electrical discharge machine configured to machine a workpiece so as to have different machined shapes on a top surface and a bottom surface of the workpiece, comprising:

a distance measuring sensor configured to move within a machining area of the wire electrical discharge machine and measure a distance from the distance measuring sensor to an object to be measured;
and
a calculating unit configured to set a reference surface in the machining area, wherein the reference surface is an upper surface or a lower surface of the worktable, and calculate a distance between the reference surface and the top surface of a workpiece and a distance between the reference surface and the bottom surface of a workpiece by measuring, with the distance measuring sensor, a distance between the reference surface and the distance measuring sensor, measuring from above the workpiece, with the distance measuring sensor, a distance between the top surface of the workpiece and the distance measuring sensor, and measuring from below the workpiece, with the distance measuring sensor, a distance between the bottom surface of the workpiece and the distance measuring sensor, and subtracting the distance measured between the top surface or bottom surface of the workpiece and the distance measuring sensor from the distance measure between the reference surface and the distance measuring sensor.

A control method for a wire electrical discharge machine configured to machine a workpiece so as to have different machined shapes on a top surface and a bottom surface of the workpiece, comprising:

a distance measuring step of moving a distance measuring sensor within a machining area of the wire electrical discharge machine and measuring, with the distance measuring sensor, a distance from the distance measuring sensor to an object to be measured;
and
a calculating step of setting a reference surface in the machining area, wherein the reference surface is an upper surface of a lower surface of the worktable, and calculating a distance between the reference surface and the top surface of a workpiece and a distance between the reference surface and the bottom surface of the workpiece by measuring, with the distance measuring sensor, a distance between the reference surface and the distance measuring sensor, measuring from above the workpiece, with the distance measuring sensor, a distance between the top surface of the workpiece and the distance measuring sensor, and measuring from below the workpiece, with the distance measuring sensor, a distance between the bottom surface of the workpiece and the distance measuring sensor, and subtracting the distance measured between the top surface or bottom surface of the workpiece and the distance measuring sensor from the distance measure between the reference surface and the distance measuring sensor.

Dependencies are inferred from the claim text.

Facts

Application: 15/910,066Filed 2 Mar 2018
Priority: JP 2017-0400693 Mar 2017
Published: US 2018/0250761 A16 Sep 2018
Granted: 15 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B23H 7/08
Wire-cutting: wire electrodes
B23H 7/065
Control of the travel curve of the relative movement between electrode and workpiece: electric circuits specially adapted therefor
G05B 19/401
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
G05B 19/404
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…