Electrical Discharge Machining
Electrical Discharge Machining (EDM) is a non-traditional machining process that uses electrical sparks to erode material, enabling the machining of complex shapes in hard and conductive materials.
More precisely, it is a process in which material is removed from the workpiece through controlled electrical discharges (sparks).
This method is particularly suitable for machining hard, brittle, or coated materials that cannot be processed using conventional methods such as turning or milling.
Our company delivers EDM services for aerospace components in strict accordance with applicable standards, ensuring exceptional precision.
How does EDM (Spark Erosion) work?
In this process, an electrode made of copper or other alloys is positioned at a very small distance — just a few microns — from the workpiece.
A very high current is applied, resulting in high-pressure sparks between the electrode and the workpiece.
The generated sparks vaporize and remove a very small amount of material from the workpiece.
This process is repeated rapidly until the workpiece reaches the desired final shape.
EDM (Spark Erosion) Services
Repair and manufacturing of aircraft components
Plastic mold injection
Production of medical equipment
Automotive industry
The extremely high precision of EDM (spark erosion) has made it a vital process in key industries. Spark machining can be carried out using different methods, depending on the type of components and the required services.
For example, in the repair of aircraft engine parts — performed by Sakht Pooshesh Company — the EDM Sinking method is applied. Each method of EDM plays a critical role in specific industries and is selected based on its suitability for the application.
1- No physical contact such as pressure or abrasion
2- Extremely high precision up to a few microns
3- Capability of removing layers from very delicate and fragile parts
4- Ability to create complex geometric shapes
EDM Methods
There are several different methods for this industrial process, each with its own specific applications:
EDM Sinking: Used for creating hollow shapes and complex molds by applying a shaped electrode.
Wire EDM (Wire Cutting): This method is applied for precise cutting using a thin wire.
EDM Drilling: Designed for producing very small holes in hard materials.
EDM Hard Cutting Machining: Spark machining applied to hard and wear-resistant components.
In addition, there are certain industrial processes that significantly increase the resistance of parts. For example, hard chrome plating is a process that enhances the durability of components by adding a hard chromium layer.