Non Traditional Machining

Manufacturing Technology
MEC205
Non Traditional machining processes

Water jet machining

Electro chemical machining

Turbine blade

EDM

EDM products

Chemical machining

Product from water jet machining
Chemical machining structure

Introduction
Machining is a broad term to describe removal of material from a workpiece.

1. Machining categories:
– Cutting involves single-point or multipoint cutting tools, each with a clearly defined geometry.

2. Abrasive processes: such as grinding.
3. Nontraditional machining: utilizing electrical, chemical, and optical sources of energy.

Need of non traditional machining processes:
Motivations in Aerospace and Electronics Industries
1. To machine new (harder, stronger & tougher) materials difficult or impossible to machine conventionally
2. For unusual & complex geometries that cannot easily machined conventionally

3. To achieve stringent surface (finish & texture) requirements not possible with conventional machining

Classification of non traditional machining processes 1. Mechanical Energy Processes
2. Electrochemical Machining Processes
3. Thermal Energy Processes
4. Chemical Machining

Classification of non traditional machining processes 1. Mechanical - Erosion of work material by a high velocity stream of abrasives and/or fluid

– Ultrasonic machining, Water jet cutting (WJC), Abrasive water jet cutting (AWJC) and Abrasive jet machining (AJM)
2. Electrical - Electrochemical energy: to remove material
–

Electrochemical

machining

(ECM),

Electrochemical

deburring (ECD) and Electrochemical grinding (ECG)

Classification of non traditional machining processes 3. Thermal - Thermal energy applied to small portion of work surface, removing by fusion and/or vaporization

– Electric Discharge Machining (EDM), Wire EDM, Electron
Beam, Laser Beam, Arc Cutting
4. Chemical - chemical etchants selectively - using a mask - remove a portion of a