Processes in Part Fabrication

Basic Process

It determines the starting geometry of work part. Metal casting, plastic moulding and rolling of sheet metal, etc. are examples of basic processes.

Secondary Processes

The starting geometry must frequently be refined by secondary processes, operations that transform the initial geometry into final geometry (or close to the final geometry). The secondary processes that might be used are closely correlated to the basic process that provides the starting geometry. Examples of secondary operations are : machining, sheet metal operations, etc.

Operations to Enhance Properties

Once the geometry has been established, the next step for some parts is to develop their mechanical and physical properties. Operations to improve properties do not alter the geometry of the part; rather, they alter physical properties. Typical examples are heat treatment, sintering, etc.

Finishing Operations

They usually improve the appearance of the work part by providing a coating on the work part (or assembly) surface. Examples include electroplating, polishing thin film deposition techniques and painting. The reason of the coating is to enhance appearance, change colour or protect the surface from abrasion, corrosion and so forth.