STAMPINGS - STAMPINGS DEEP DRAWN - DRAWN SHELLS - EYELETS
All of the above terms are sometimes used interchangeably. They all refer to the creation of components using various alloys of raw material and punch/die arrangements to form the part.
The common trait of parts made from these processes is that they have a uniform wall and bottom thickness compared to machined, cast or screw machine parts and are almost always more economical in appropriate volumes.
Within the industry these process names take on a more esoteric meaning:
- STAMPINGS: Generally refers to flat or shallow drawn (depth less than diameter) parts, usually high volume from thin materials, .006" to .050", achieving nominal dimensional tolerances of .002" or better.
These parts are best made on straight-sided presses and can have die multiples of from 1 to 38 per stroke. Die multiples of greater than one produce greater cost savings on piece price but require greater tooling investment.
- STAMPINGS DEEP DRAWN: Covers a broad category of parts but can generally be divided into two groups:
A) Generally large parts from 10 to 30 inches in length made from thicker materials (.050" - .125") and usually fabricated on single stage hydraulic presses.
Volumes are usually low (200 2000 pieces) and production output capacity is generally slow compared to smaller parts from transfer presses. Tolerances are greater than those parts from transfer presses.
B) Parts from .250" to 4.5" in length made on eyelet transfer machines in high volumes (100K to millions). Usually fabricated from materials from .006" to .050" in thickness holding .005" tolerance in length and .002" in diameter.
Faster production rates create more cost-effective product than hydraulic press product. Additionally there is usually a slight cost savings on material versus progressive die production.
- DEEP DRAWN SHEELS EYELETS: These categories have the same general meaning as item "B" above, fabricated on eyelet transfer machines.
All processes can fabricate from steel, stainless steel, copper and aluminum alloys.
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