How a progressive die works? What are the differences?

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This is the part that you want to produce

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But you need to make two holes on it for referencing.
-even you do not need on part functionality-

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Let’s look at croos section

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This is the conventional way to produce:
Put the blank onto the die using reference holes first;

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Upper part of the die approachs

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And cuts it

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We produced a part and a problem;
How can we take out undesired pheripheral part?

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Because of this….
You can not cut out all pheripheral in one step

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First cut out some…

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OK. Half of the job has been completed

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Now the rest of the job has been completed.
We got the part.

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See all three steps together:
A progressive die is an advanced way this sequence

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With two additional rule :
1) keep connected

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A step
2) step by step

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Coil comes and you make two reference holes first

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You add a small opening on step two…

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And make another cavity on step three…

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It goes like this…

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Again…

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And again

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You got the desired shape finally

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Cut-off the connecting bridges and get the part

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And Let’s have a look at how the punchs has been positioned
Along the die