Type of Machines and Sequence of Operations

Type of Machines

In general, very large parts are produced by slower methods because of difficulty in handling. Hence they must be produced on the larger and slower machines mainly on a tool room basis. Smaller parts whose shape is easy to handle can be produced on faster machines and are more readily adapted to mass production. There are exceptions, of course. For example, in the pressed metal industry production techniques have been developed to the point where large sheet metal parts can be produced at relatively high speeds. Hence in general, the size and shape of the workpiece associates itself closely with the size and type of machine required to produce it.

Sequence of Operations

The shape of the workpiece does influence which of its surfaces must be machined first and method of location necessary for maintaining maximum dimensional control over its geometry.