Electric heating – Metal heating – Cutting or disintegrating
Patent
1990-07-02
1992-01-14
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6912, 219 6914, 36447404, B23H 720, B23H 702, B23Q 1700
Patent
active
050813323
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an electrical discharge machine with a management information indicating function, and more particularly, to an electrical discharge machine in which expendable parts can be replaced at an appropriate time and a drop of the machining fluid storage level can be quickly coped with.
BACKGROUND ART
If an electrical discharge machine is operated for a long period of time, various expendable parts of the electrical discharge machine wear away and suffer deterioration in performance, thus possibly entailing a trouble which disables operation, as well as reduction in machining accuracy and machining speed. Accordingly, the exhausted parts must be replaced with new ones. Conventionally, an operator determines whether the life of each expendable part has terminated, on the basis of visual observation or experience. It is difficult, therefore, to replace each part at an appropriate time. If the time for the part replacement is too early, the operation cost of the electrical discharge machine increases. If the time is too late, on the other hand, the aforesaid awkward situation is entailed.
Further, the electrical discharge machine supplies a machining fluid to predetermined regions, such as the gap between a workpiece and an electrode, a workpiece stand, etc., by injection, thereby removing heat and machining chips produced during electrical discharge machining. If the machining fluid storage level in a machining fluid reservoir extraordinarily drops due to anything unusual in a machining fluid supplying device or the like, however, the machining fluid cannot be normally supplied, so that the operation of the electrical discharge machine is hindered.
DISCLOSURE OF THE INVENTION
The object of the present invention is to provide an electrical discharge machine capable of indicating a termination of the life of expendable parts, thereby rationalizing the time for replacement, and preferably also indicating an extraordinary drop of the machining fluid storage level, whereby the drop of the machining fluid storage level can be quickly coped with.
In order to achieve the above object, according to the present invention, there is provided an electrical discharge machine with a management information indicating function, the electrical discharge machine having at least one of first and second part groups, the first part group including at least one expendable part continually used during electrical discharge machining, the second part group including at least one expendable part used as required during the operation of the electrical discharge machine.
This electrical discharge machine comprises: detecting means for executing detection of the working period of the at least one expendable part, included in the first part group, during the time interval between the start of the electrical discharge machining and a first predetermined point of time, and/or detection of the frequency of use of the at least one expendable part, included in the second part group, during the time interval between the start of operation of the electrical discharge machine and a second predetermined point of time; updating means for updating a corresponding one of the cumulative working period and the cumulative frequency of use of each of the expendable parts in accordance with a corresponding one of the working period and the frequency of use thus detected; discriminating means for making comparison between the updated cumulative working period and the allowable working period of the expendable part and/or comparison between the updated cumulative frequency of use and the allowable frequency of use of the expendable part, thereby determining whether the life of each of the expendable parts has terminated; and indicating means for indicating a termination of the life of each of the expendable parts in accordance with the result of determination by the discriminating means.
Preferably, the electrical discharge machine includes a machining fluid supplying device having a machining fluid reservoir
REFERENCES:
patent: 4685064 (1987-08-01), Kinoshita
patent: 4980532 (1990-12-01), Morishita
Evans Geoffrey S.
Fanuc Ltd.
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