The Benefit of EDM Process To CNC Machined Industry
Electronic discharge machining is a manufacturing process where electric discharges also known as sparks are removed from a machine through erosion. The two electrodes which are referred to as the tool and the workpiece are exposed to a sequence of fast electrical discharges in the presence of dielectric liquid which separates them so that they don’t make any contact and are subjected to electric voltage. The sparks are expected to erode the work piece to come up with the desired shape. EDM is also referred to as spark machining, burning or arc machining.
Below are main three EDM process in industry
Die Sinker EDM
It is also known as cavity EDM and is usedto create cavity holes in die applications and tools by submerging the workpiece and electrode into an insulating liquid such as oil and dielectric fluids. They are both connected to a power supply. Die sinker process begins by machining a graphite electrode into the desired cavity.
This method involves making dies from hardened steel by feeding wire from a spoon. It uses a thin wire for an electrode which moves in a controlled pattern causing sparks between the wire and the workpiece.
Hole Drilling EDM
This machine uses hole making machine known as hole popper which creates a pilot hole for threading. Hole drilling EDM is designed to create accurate,fast and deep holes. It can drill an inch deep hole in a minute and is ideal for very hard materials.
What kind of material we can use EDM process in industry?
EDM materials need to be electrically conductive. EDM machines are used in molds industries, mold making and tools. They are used in making prototype and production types in automobile, aerospace and electronics industries. These industries have relatively low production quantities.
Why we need to use EDM process?
EDM is ideal for cutting hardened materials with excellent surface finishes. This saves the industry from incurring additional costs on post-processing and surface treatment. Additionally, the EDM process is very accurate, fast, predictable and repeatable. It requires minimum labor hence saves the company of additional manufacturing costs. Wire EDM has many applications such as cutting strippers, inserts, die buttons, slides, knockouts and other parts.
Compare EDM to another machined process
EDM process depends on the type of application you intend to use it for. As compared to other machined processes, EDM application is slower but is more predictable, repeatable and accurate. Moreover, EDM reduces labor and manufacturing costs as it can operate unattended. EDM electrode production runs through the clock with minimum attention from human.
Light milling application is used as an alternative to EDM for hard metal that require smooth detail and intricate details because it can follow precise and complex tools with high speed rates.. EDM on the other hand is mostly applied at home with low volume operations like in the aerospace industry and medical devices industries.
EDM is used for smaller piece feature sizes which require high accuracy since it does not encounter limitations with L:D when internal radii become smaller like the case in conventional milling. Milling is not helpful in cases where L:D is particularly high as it cannot do the deep cutting required.
When it comes to surfaces that need texturing, milling is the best option since it does not require polishing before texturing. EDM adds another process since surfaces must be polished before texturing.
Compare EDM to Additive Manufacturing
Addictive manufacturing requires you to build on a base plate then separate them. Separating them is very complex, but wire EDM helps in cutting the parts of the base plate.
EDM is used to finish features that require high accuracy and finer finishes which cannot be produced by addictive manufacturing.
Is Electrical Discharge Machining Right for You?
If you are looking for an accurate, repeatable and precise machining process, the EDM process is the best solution. However, if you need a process that will cut quickly cut a lot of parts, EDM is not the best choice.
Creatingway is concentrate on CNC machining manufacturing, prototype machining, low-volume manufacturing, metal fabrication and parts finishing services, provide you best support and services. ask us one inquire now.
Any questions or RQF for metal& plastic technology and custom machining, welcome to contact us below
Call +86-0(755)-89492523 or Send an inquire to us
Welcome visit us, any metal and plastic design and machining questions, we are here to support you. Our services email address: