Wire EDM Cutting ( Wire Electrical Discharge Machining )
It Belongs To The Field Of Electrical Processing. When The Couple Of Lazar And Lianke Of The Former Soviet Union Studied The Phenomenon And Cause Of The Damage Of Switch Contacts Caused By Spark Discharge Corrosion, They Found That The Instantaneous High Temperature Of Electric Spark Can Make Partial Metal Melt And Oxidize And Corrode, Thus Creating And Inventing The Method Of Electrical Spark Processing. Wedm Was Also Invented In The Former Soviet Union In 1960, And China Was The First Country To Use It In Industrial Production.
Physical Principles
Free Positive Ions And Electrons Accumulate In The Field And Form An Ionized Conductive Channel Very Quickly. At This Stage, An Electric Current Is Formed Between The Two Plates. As a Result Of Numerous Collisions Between Particles, a Plasma Zone Is Formed, Which Quickly Rises To a High Temperature Of 8000 To 12000 Degrees. Some Materials Are Melted Instantaneously On The Surface Of The Two Conductors. At The Same Time, a Bubble Is Formed Due To The Vaporization Of The Electrodes And Dielectric Liquids, And Its Pressure Rule Rises Until Very High.
Then The Current Interrupts And The Temperature Drops Suddenly, Causing The Bubble To Explode Inward. The Power Generated Throws The Dissolved Material Out Of The Crater, And The Corroded Material Condenses Again Into Small Spheres In The Dielectric Solution And Is Discharged By The Dielectric Solution. Then Through CNC Control Monitoring And Control, Servo Mechanism Execution, So That This Discharge Phenomenon Is Uniform.
