Plural resistance-capacitance (PRC) electrical discharge machining system

Patent metadata

Field	Value
Publication number	US-9950377-B2
Application number	US-201414560460-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	May 30, 2014
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

The present invention provides a plural resistance-capacitance (PRC) electrical discharge machining system comprising a control module, a digital electronic module, a driving module, and a discharge module. The control module allows the user to input a command and output a control signal accordingly. The digital electronic module processes the control signal and outputs a sequence signal to the driving circuit. The driving module amplifies the sequence signal and then outputs a driving signal to the discharge module. The discharge module then controls and drives a plurality of transistors to open circuits and break circuits according to the driving signal for controlling the charging and discharging of a plurality of capacitors of the discharge module in the electrical discharge machining. The present invention can increase the amount of discharge in a machining process, and improves the efficiency thereof.

First claim

What is claimed is:

1. A plural resistance-capacitance (PRC) electrical discharge machining system, comprising:
a control module, receiving an input command from a user and outputting a corresponding control signal;
a digital circuit module, electrically coupled to the control module, the digital circuit module processing the control signal for outputting a corresponding time-sequential signal;
a driving circuit module, electrically coupled to the digital circuit module, comprising an amplifying circuit for amplifying the time-sequential signal and outputting a corresponding driving signal; and
a discharge circuit module, electrically coupled to the driving circuit module, comprising a plurality of transistors and a plurality of capacitors, where the discharge circuit module controls the plurality of transistors that are to be switched between an open circuit and a closed circuit according to the driving signal so as to control a charging and discharging sequence of the plurality of capacitors for performing an electrical discharge machining (EDM) process to a work-piece;
wherein the digital circuit module further comprises:
a first sub-circuit, for receiving the control signal;
a second sub-circuit, electrically coupled to the first sub-circuit for generating a plurality of logical gates according to the control signal;
a third sub-circuit, electrically coupled to the first sub-circuit and the second sub-circuit for integrating the logical gates according to the control signal and generating a logical program; and
a wave pattern generator, electrically coupled to the second sub-circuit for generating a timing signal;

wherein the control signal is inputted to the second sub-circuit and the third sub-circuit through the first sub-circuit, the second sub-circuit generates the logical gates according to the control signal and outputs the logical gates to the third sub-circuit, the third sub-circuit arranges the logical gates according to the control signal and outputs the logical program to the second sub-circuit, and the timing signal outputted from the wave pattern generator is integrated with the logical program to form the time-sequential signal.

2. The plural resistance-capacitance (PRC) electrical discharge machining system of claim 1 , wherein the digital circuit module comprises a programmable logic device (PLD).

3. The plural resistance-capacitance (PRC) electrical discharge machining system of claim 1 , wherein the wave pattern generator comprises an oscillator or a function generator.

4. The plural resistance-capacitance (PRC) electrical discharge machining system of claim 1 , wherein the second sub-circuit comprises a configurable logic block (CLB), and the third sub-circuit comprises a programmable interconnect block (PIB).

5. The plural resistance-capacitance (PRC) electrical discharge machining system of claim 1 , wherein the amplifying circuit comprises a voltage amplifying circuit or a current amplifying circuit.

6. The plural resistance-capacitance (PRC) electrical discharge machining system of claim 1 , wherein the driving circuit module further comprises an opto-isolator for protecting the time-sequential signal from the noise generated from the EDM (electrical discharge machining) process.

7. The plural resistance-capacitance (PRC) electrical discharge machining system of claim 1 , wherein the discharge circuit module comprises a plurality of charge-discharge units, each charge-discharge unit comprises at least two transistors and at least one capacitor, the capacitor is disposed between the transistors and connected to the transistors in series, and the charge-discharge units are connected to each other in parallel.

8. The plural resistance-capacitance (PRC) electrical discharge machining system of claim 7 , wherein each charge-discharge unit comprises a plurality of resistors, each resistor is disposed between the transistors and the capacitors and connected to the transistors and the capacitors in series.

9. The plural resistance-capacitance (PRC) electrical discharge machining system of claim 8 , further comprising a DC source and an EDM (electrical discharge machining) device, the DC source is coupled to the discharge circuit module for charging the capacitors, the EDM device is coupled to the discharge circuit module for receiving the electricity discharged from the discharge circuit module for performing the electrical discharge machining (EDM) process to the work-piece.

Assignees

• Univ Nat Taiwan Normal

Inventors

• Chen Shun-Tong
• Chen Chi-Hung
• Shih Po-Yuan

Classifications

• B23H1/02 Primary

  Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges · CPC title

• B23H2300/20

  Relaxation circuit power supplies for supplying the machining current, e.g. capacitor or inductance energy storage circuits · CPC title