To compliment our manufacturing services for thin gauge components, we have also introduced an EDM wire erosion facility within our business to further add to our processing capabilities for our customers.

Benefits of Wire Erosion

Whilst chemical etching is an accurate method of manufacture, occasionally specified tolerances are smaller than the process capabilities and we may need to look at alternative processes such as wire erosion. Extensive research and development has allowed us to develop a cost effective method of manufacturing thin gauge metal components using EDM wire erosion, giving the benefit of a square edge and improved dimensional accuracy. It also allows the processing of the few metals whose chemical composition makes them unsuitable for photo etching.

The capabilities of our wire erosion machines are not limited to the manufacture of thin gauge metal components, as metal up to 150mm thick can be processed, with no additional programming charge.

Electrical discharge machining (EDM), also known as spark machining, spark eroding or wire erosion, is a manufacturing process where a desired shape is achieved by using electrical discharges. Metal is removed from the components by a series of rapidly recurring current discharges between two electrodes, separated by a dielectric liquid and subject to an electric voltage. One of the electrodes is called the tool-electrode, while the other is called the workpiece-electrode, or “work piece.” The process depends upon the tool and work piece not making actual contact.

When the voltage between the two electrodes is raised, the intensity of the electric field in the volume between the electrodes becomes greater than the strength of the dielectric (at least in some areas), which breaks down, allowing current to flow between the two electrodes. As a result, metal is removed from the electrodes. Once the current stops, new liquid dielectric is usually conveyed into the inter-electrode volume, enabling the solid particle debris to be carried away and the insulating properties of the dielectric can be restored. Adding new liquid dielectric in the inter-electrode volume is commonly referred to as “flushing.” Also, after a current flow, the difference of potential between the electrodes is restored to what it was before the breakdown, so that a new liquid dielectric breakdown can occur.

This process offers very accurate metal component parts and is offered as parts of Qualitetch’s total metal component solution.

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Check out my latest article: Case Study - Product Innovation through Photo Etching https://t.co/SNgw8BT0Xe via @LinkedIn
10:00 AM Oct 14th|@qualitetch

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