TABLE OF CONTENTS Dies can be classified according to a variety of elements and in keeping with the diversity of designs of dies. I It is possible to classify dies according to:
Manufacturing processes: blanking, punching, bending, deep drawing, etc.
Number of operations: single-operation (simple), and multi-operation (combination) dies.
Number of stations: single station and progressive dies.
Single station dies may be:
combination (a die in which both cutting and noncutting operations are accomplished at one press stroke), or
b) compound (a die in which two or more cutting operations are accomplished at every press stroke).
Progressive dies are made with two or more stations. Each station performs an operation on the workpiece or provides an idler station so that the workpiece is completed when the last operation has been accomplished. After the first part has traveled through all the stations, each subsequent stroke of the press produces another finished part.
Depending on the production quantities of pieces high, medium, or low press dies may be graded as follows:
Class A These dies are used for high production only. The best of materials are used, and all easily worn items or delicate sections are carefully designed for easy replacement. A combination of long die life, constant required accuracy throughout the life, and ease in maintenance are prime considerations, regardless of tool cost.
Class B These dies are applicable to medium production quantities and are designed to produce the designated quantity only. Die cost as...
