Conventional stamping dies fit into three major categories of die construction.
They are simple, compound & progressive.
Showing posts with label Types of dies. Show all posts
Showing posts with label Types of dies. Show all posts
Sep 4, 2009
Simple die
A simple die is typically one that perforates holes in a part by or blanks out the part using punches in conjunction with mating lower die components (Matrixes). Basic forms, notching and lancing are also commonly performed in simple dies.
Simple dies rely on a press operator to load and unload parts and part material before and after each cycle of the press.
Compound die
A compound is one that blanks and perforates a part at the same time and at the same station. In most cases a hole or holes are perforated down while the part is blanked up. This allows the slugs from those holes to fall through the die however, this leaves the part in the die requiring some means of part removal.
Compound dies are commonly run as single hit dies but can be run continuously with a feeder provided the part can be removed in a timely manner.
The advantages of building a compound die are;
1) Requires minimal space in the press.
2) Leaves all burrs in one direction.
3) Superior accuracy between holes and trim edges.
4) More economical to build than a progressive die.
A disadvantage of building a compound blank die is the limited space which ends to leave die components thin and weak. This concentrates the load and shock on punches and matrixes resulting in tooling failures.
Progressive die
Progressive die consists of multiple stations aligned in a row with part being fed from station to station by being attached to the skeleton until the last station, where it is cut-off. Progressive dies are used for batch production of small to medium size components. Progressive dies provide an effective way to convert raw coil stock into a finished product with minimal handling. As material is fed from station to station in the die, it is progressively worked into a completed part.
Progressive dies usually run from right to left. Early stations typically are used to perforate holes that can be utilized by pilots to locate the stock strip in later stations.
