Electric discharge machine

Abstract

Abstract PURPOSE:To prevent the continuation of abnormal electric discharge and improve working speed by installing the electric-discharge suspension-time controllers which output signals into the suspension-time setting devices, in an electric discharge machine. CONSTITUTION:The terminal for outputting the number of abnormal electric-discharge wave-forms which is installed onto an electric-discharge state discriminating apparatus 19 and the terminal for outputting the number of electric-discharge wave-forms generated when an electrode gap is contaminated are connected to the OR elements 23 of an electric-discharge suspension time controller 21, and the logic sum of each number of both wave-forms is outputted into a counter 25. The output A of the counter 25 is input into a comparator 27 for increasing the electric-discharge suspension time and a comparator 25 for reducing the electric- discharge suspension time, and the both values are compared with the standard value B for increasing the electric-discharge suspension time and the standard value C for reducing the electric-discharge suspension time, respectively, and when A is larger than B, a signal at H-level is outputted into one input terminal of an AND element 31. With such constitution, the continuation of abnormal electric discharge can be prevented, and working speed can be improved.

Inventors

• 👤 Kiyoshi Imai
• 👤 潔 今井

Bibliographic Details