Wire Electrical Discharge Machining or simply wire EDM is not a new industrial invention this decade. It was used during the turn of the 18th century when Joseph Priestly discovered that electrical discharge has the capability to erode metal. Through time, this discovery has evolved to meet the demands of industries that require extensive and delicate machine works. The discovery of submerging electrodes in a special dielectric fluid resulted to controlling erosion that takes place during electrical discharge.
This marked the development of the EDM machines in the 20th century in the Soviet Union. Americans took this discovery seriously and from there, they created a machine that will be responsible in removing broken drills and taps set on aluminium castings. To make it even more effective, engineers subsequently took things a notch higher as they manufacture machines that can help cut through pieces of metal in a faster and more efficient manner. More interesting facts about wire EDM technology can be read below.
This technology is used for specific projects
Wire EDM is used in projects that require material stress limitations and surface finish requirements. This is also recommended for volume productions of brittle materials as flat layers can be easily stacked up and cut precisely according to your standard.
The wire EDM uses a special kind of material
The wire used in this kind of technology is commonly made of brass and for better performance, zinc-coated wire may be an option as this tolerates heat at a greater extent. Zinc-coated wires also help keep the spark more consistent. Another alternative is to use heat-diffused annealed wire (a brass wire that is enriched with zinc).
Its quality to withstand heat whilst maintaining consistency throughout the cutting process plus its ability to resist breakage makes it a good choice. Be informed though that your choice of wire has a great impact on your output. Without changing the machine’s settings, a brass wire can cut in ten hours whilst a heat-diffused annealed wire can reduce it by several hours. Optimum performance can be achieved by adjusting its settings.
The technology uses water
There are two factors to consider regarding the water that will be used – its cleanliness and correct conductivity should be maintained. Water gets murky during operational procedures because of the metal particles that go into the water. This recirculates through a filter and a deionising resin to remove metal atoms from the solution. Periodic maintenance procedure should include scheduled replacement of filter cartridges and regeneration of deionizing resin.
It makes use of CNC instruments
A wire EDM is run by a computer numerically controlled (CNC) instrument which can control the wire. This allows optimum precision and greater flexibility. Intricate patterns and cuts are made unlike in conventional EDM. More than that, it can cut metal as thin as 0.004”. Manufacturers continue to make thinner wires for smaller kerfs.
Best for projects that require precision
Because of its ability to cut very small pieces, it is a common choice for manufacturers that produce highly-detailed items that would normally be impossible for other machines to make. Having it is a great investment as it guarantees mass production at a shortened period whilst maintaining precision and neatness.
If you want to try out this technology for your industry, you can call on us. We offer EDM wire cutting in Perth and more.