The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 19, 2024
Filed:
Jun. 04, 2021
Sodick Co., Ltd., Kanagawa, JP;
Sodick Co., Ltd., Kanagawa, JP;
Abstract
An electric discharge machine includes a DC power supply, a main switching element, a polarity switching circuit, a pulse generator, a detector, and a discharge controller. The DC power supply supplies a current to a machining gap. The pulse generator switches the main switching element and one of a positive switching element and a reverse switching element of the polarity switching circuit at a predetermined switching frequency. The detector detects an interpolar voltage in the machining gap. The discharge controller includes a storage that stores a coefficient indicating a removal quantity per discharge count for each operation pattern, and a calculator that calculates the discharge count from the interpolar voltage and estimates the removal quantity from the discharge count and the coefficient according to the operation patterns.