Electrical discharge machine

Patent metadata

Field	Value
Publication number	US-10124432-B2
Application number	US-201615253919-A
Country	US
Kind code	B2
Filing date	Sep 1, 2016
Priority date	Sep 3, 2015
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

An electrical discharge machine of the present invention is provided with a machining tank stored with a machining fluid in which a workpiece is immersed for electrical discharge machining, a reservoir unit configured to store the machining fluid in order to supply to and recover the machining fluid from the machining tank, a machining tank non-storage condition detecting unit configured to detect that the machining fluid is not stored in the machining tank, an addable amount specifying unit configured to specify the amount of the machining fluid stored in the reservoir unit when it is detected that the machining fluid is not stored in the machining tank and specify an addable amount, which is an addable machining fluid amount, based on the capacity of the reservoir unit and the amount of the machining fluid stored in the reservoir unit, and a machining fluid adding unit configured to add the machining fluid in the addable amount or less.

First claim

The invention claimed is:

1. An electrical discharge machine configured so that a workpiece is immersed in a machining fluid and a voltage is applied to a machining gap between an electrode and the workpiece to generate electrical discharge, whereby the workpiece is subjected to machining, the electrical discharge machine comprising:
a machining tank stored with the machining fluid in which the workpiece is immersed for electrical discharge machining;
a reservoir unit configured to store the machining fluid in order to supply to and recover the machining fluid from the machining tank;
a machining tank non-storage condition detecting unit configured to detect that the machining fluid is not stored in the machining tank;
an addable amount specifying unit configured to specify the amount of the machining fluid stored in the reservoir unit when it is detected by the machining tank non-storage condition detecting unit that the machining fluid is not stored in the machining tank and specify an addable amount, which is an addable machining fluid amount, based on the capacity of the reservoir unit and the specified amount of the machining fluid stored in the reservoir unit;
an addable amount storage unit configured to store the addable amount obtained by the addable amount specifying unit; and
a machining fluid adding unit configured to add the machining fluid in an amount that is no greater than the addable amount stored in the addable amount storage unit, wherein
the machining fluid adding unit adds the machining fluid only during a predetermined machining fluid addition permission period.

2. The electrical discharge machine according to claim 1 , wherein the machining fluid adding unit adds the machining fluid so that the change in the quality of the machining fluid is not greater than a predetermined value.

Assignees

• Fanuc Corp

Inventors

• Masuda Masashi
• Kawahara Akiyoshi
• Nakashima Yasuo

Classifications

• B23H1/10 Primary

  Supply or regeneration of working media · CPC title

• B23H11/00

  Auxiliary apparatus or details, not otherwise provided for · CPC title

• B23H7/36

  Supply or regeneration of working media · CPC title

• B23H3/10

  Supply or regeneration of working media · CPC title

• B23H7/02 Primary

  Wire-cutting · CPC title