Gasser & Sons, Inc. Case Study |
 Deep Drawing |
 CNC Finishing Operation |
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 Drawn Parts Ready for Finishing |
 Sectioned Part Shows .375" Wall Thickness |
The task:
Deep draw a cup-shaped copper part, 8" high x 4" diameter, with a wall thickness of .375" (9.525mm), while maintaining very specific tolerances and geometries.
To begin with, this was twice the thickness of any part we had previously drawn. After experimenting with less expensive aluminum, the parameters were established by a team comprised of members of both our engineering and production departments.
It was determined that the blank needed was to be stamped from a square blank to eliminate as much scrap as possible and a blanking die was built and set up in a mechanical press as the first operation. From this point on, everything was done in a 125-ton hydraulic press without the need for a pressure pad. To achieve the specific "cup" shape, a proprietary shaped die was built that incorporated unique geometries to draw the thick copper part without damaging, stretching, wrinkling, or otherwise stressing the material. These dies essentially have a series of programmed points that results in a generous outward arc that transitions to a downward fall, permitting the thick copper to "flow" out-and-down.
Four successive dies were designed with less "out" and more "down" geometries to bring the part to its final specified shape without creating unwanted pinch points. The tool steel die sets ran up to about 500 lbs for the largest die with the required clearance allowed in addition to the material thickness. These die sets will be stored in our Die Library for future production runs of this very special part.
The bottom line is, we are able to prove day in and day out that we have the skilled people, manufacturing technologies and metalworking experience needed to meet your most demanding part requirements.
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For more information on our products and services please contact us via:
Ph: 631-543-6600 Fax: 631-543-6649 Email: sales@gasser.com |
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