Pulse generator for electroerosive processing
US4163887A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1977 |
| Grant date | Aug 7, 1979 |
| Priority date | — |
| Expiry date | Aug 16, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H2300/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A generator for machining by means of electrical discharges between a tool electrode and a workpiece electrode. The generator consists of a main voltage source connected between the tool electrode and the workpiece electrode through an improved switching circuit which is activated by an adjustable oscillator. The switching circuit delivers short pulses of high pulse current and consists of a plurality of identical impulse amplification stages. A first one of these impulse amplification stages drives all the additional ones. Power transistors are used. With a base current regulating system, the turn-off delay of these power transistors is eliminated by keeping them far away from saturation. Resistance-capacitance and resistance-inductance elements and a special cabling are used to eliminate certain impulse transmission problems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.