Material Specifications and Originating Operation
In part prints the information regarding the material from which the part is made is generally found in one of two places. In most cases, material specifications are presented in the title block close to the general description. However, some designers show this information in general notes. Different materials present different manufacturing problems as well as different manufacturing costs. It is necessary to know the material of the workpiece in order to cope with both of these important problems.
- The Originating Operation
The general configuration of the workpiece is created by the originating operation. There is actually no fixed rule to find how the workpiece is originated from part print. In some cases, only the material specification is presented and the process engineer is left to determine whether the piece will be cast, forged, or made from bar stock. But in most of the cases the decision is not left to the process engineer but is either spelled out with the material specifications or in the general notes.