Electric heating – Metal heating – Cutting or disintegrating
Patent
1997-11-26
1999-11-16
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6912, B23H 100, B23H 912
Patent
active
059862319
ABSTRACT:
A production method for deburring die for castings utilizes a machining gap defined between an electrode of an EDM apparatus and a deburring die member or a cut member, feed control of the electrode and electric discharge machining effected by applying a pulse voltage between the electrode and a steel sheet or cut member. In this method, a prototype of castings is horizontally hung in the apparatus with either one side thereof serving as a model for the front side of the lower deburring die while a contour of the prototype is two-dimensionally detected based on the X- and Y-coordinates, the values of which are inputted in a control unit of the EDM apparatus. Based on the values, a lower deburring die hole symmetrical with the contour of the prototype is formed in the steel sheet thereby producing the lower deburring die and the cut member. On the other hand, the prototype is horizontally hung in the EDM apparatus with the other side thereof serving as a model for the front side of the upper die and used as the electrode for engraving in the front surface of the cut member a geometry symmetrical with that of the prototype so that the upper deburring die is produced.
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