Capable of continuous automatic operation for long periods of time
• Wire winding is drum method
• The wire of a typical brass wire EDM machine is disposable, but the wire of this wire EDM machine is
Molybdenum electrode wire (200m) is wrapped around a drum and rotated and reversed repeatedly to extend the life of the wire.
• The wire uses molybdenum wire
・The wire of this wire discharge contour machine can repeat rotation and reversal for a long time
and can be operated continuously.
*Wire life varies depending on processing conditions.
• Wire cost: Approximately 800 JPY per month
・It uses molybdenum wire for excellent durability, and the monthly cost is approximately 800 JPY,
making it excellent cost performance.
• Comparison table of brass type wire cut and STG molybdenum type wire electric discharge
machining contour machine
| |
STG molybdenum type |
brass type |
| |
Just because the wire travels at a high speed does not mean high-speed processing is possible. |
|
| There is no problem in practical use
stepping motor drive
However, maintenance is easy |
very good
servo motor drive |
|
| Using wire |
Repeated use |
Disposable |
| Wire material |
Molybdenum |
Brass |
| Wire diameter |
Usually 0.18 |
Usually 0.25 |
To the workpiece hole
Connecting wires |
Manual (tricks required) Easy once you get used to it |
Automatic/Manual (easy) |
| Wire length |
About 200 meters |
Thousands of M |
| Wire guide model |
Guide wheel long life |
Dice guide short life |
| Wire feed position accuracy |
No problem for practical use
(Because there is no dice guide) |
Good |
| Wire breakage, etc. |
Hard to break even when used roughly
Less influence of cooling water
Therefore, it is possible to process extremely thick workpieces |
If not strictly managed, the wire will break |
| Wire tension |
There is no special mechanism using tools when winding the wire around the drum |
Control between supply roller and discharge roller
Regular roller replacement required |
| Power supply block to wire |
Carbon brush, cheap |
Cemented carbide, expensive |
| Quality of machined surface |
Wire reversal pattern appears |
Beautiful |
| Pulse power supply |
Voltage 48-100V Current 1-5A |
Voltage approximately 300V Current 1-32A |
| Discharge interval/mm |
0.01?0.03 |
0.01?0.12 |
| Processing fluid |
Dilute the vegetable emulsion with water
Because the machining fluid contains oil, the life of the pulley bearings in the wire supply path is long. |
Pure water (ion exchange resin) |
| Machining fluid conductivity |
Use a conductivity meter |
Adjusted by ion exchange resin |
| Processing fluid filter |
Simple filter |
Requires frequent replacement |
| Processing fluid supply |
As long as the machining fluid is applied to the workpiece, a general low-pressure machining fluid pump is sufficient
The piping is a low pressure hose
There is only a manual cock, so the need for maintenance is low |
High pressure machining fluid supply device required
For conductivity adjustment and jet flow circuit
Regular switching of solenoid valves, etc.
Maintenance required |
| Maintenance |
Easy
Most parts can be replaced by the user |
Difficult
|
| Operating costs |
Cheap, about 40 yen/hour |
Expensive, about 300 yen/hour |
| Base price |
cheap |
High |
| |
STG molybdenum formula |
Brass style |
Processing speed (mm2/min)
per unit time
Machining cross-sectional area |
230 |
240 |
Processing accuracy/mm
(Example) Octagonal test piece
Inter-plane distance comparison |
0.01?0.04 |
0.004?0.01 |
| Surface roughness Ra/um |
1.6?3.2 |
0.1?1.6 |
| Wire consumption |
Less wear throughout the wire |
Wasted between the thickness of the workpiece
Becomes thinner |
| NC control code |
Basically, 3B code
However, since it has a G code conversion function,
Programming possible with G code |
ISO G code |
| Machining figure program |
Built-in CAD/CAM system
Based on DXF text file
Data can be exchanged with existing CAD |
A separate CADCAM system may be required
Many
|
| Tapering |
Possible, but not recommended |
Possible |