Since it is EDM machining, electrode loss will occur during use, and the normal loss is generally about 0.1%. If the value exceeds the value, then an abnormal situation has occurred.
In the face of this situation, we have listed the following methods To deal with:
- 1. Improper selection of discharge conditions.
- 2. Oil flushing is the main method to eliminate electric corrosion during EDM. Poor oil flushing conditions will have a certain impact on EDM.
- 3. Periodic tool lift ratio can increase chip power and pulse stop time, and improve chip conditions.
- 4. It may also be caused by the working fluid of the spark machine.
Discharge short circuit
If the gap value is zero, it is easy to short-circuit and cause arcing during machining. In ordinary EDM machining, there is a discharge gap between the workpiece and the electrode. If there is a secondary discharge, the energy will be consumed in the corrosion product. In the remelting process, this will reduce the processing speed and burn the processed surface.
The arc of electrical discharge machining
- 1. Reasonably choose the conditions of EDM to prevent secondary discharge and arc drawing.
- 2. When processing large-area workpieces, you can prevent arcing by increasing the number of lifting knives or increasing the pressure of the buffer solution.
- 3. From the time and manufacturing industry, the development of the application field, the appearance of the molding line and its manufacturing of deep holes, the average processing time of the spark machine can also improve the effect of the metal.