Grinding machining and Wire-Cut EDM are both machining methods for mold components, especially for stamping die components. Of course, 5-axis/3-axis CNC machining can also be used for making the tool and die components.
But compared to the quality of different machining methods, EDM (including wire EDM and sinker EDM) is better than CNC machining; Grinding is better than EDM.
To be specific, in the precision tolerances, grinding is doing better than EMD, and EMD is doing better than CNC machining.
In the Surface roughness and surface evenness, Grinding is also doing better than EMD, and EMD is also doing better than CNC machining in some places.
According to the speeds, CNC machining is the fastest way for machining, and EDM needs a longer time than CNC. And grinding needs a longer time than EDM. But fast doesn’t mean the quality. In some respects, Slower Grinding is better than EDM and CNC.
Maybe grinding is the best mechanical processing method for ultra-precision components in steel, HSS, or Carbide.
There are various kinds of grinding, surface grinding, profile grinding, jig grinding, cylindrical grinding, centerless grinding, internal and external circular grinding, etc. We will not talk about various grinding technologies here.
We just need to know that grinding is the basic and best machining method, and grinding parts quality is better than EDM and CNC machining(milling and turning).
