Case Study: Delivering Quality with Innovation

Minimize the risk of damaging the breather cover and the tooling die during metal stamping.

Deliver the part to match its design print.

Continuously meet production quantities that are predicted to increase from year to year.

The four small pierced holes labeled in the image are smaller than the actual material thickness. This presents a problem because the continued force of the punch going through the material creates a higher probability of the punch breaking off or becoming off target. Three of these four holes are on non-flat surfaces which also makes the piercing operation more challenging.

Design and build a subtool for this piercing operation in the progressive stamping die. This design presents two key benefits.

1. The subtool in the stamping die keeps the piercing operation separate;
   localizing the force of the punch to this specified area. Then the remaining
   stations on the tooling die strip aren’t at risk of damage during
   production. This also helps keep the entire die strip aligned in the correct
   position from operation to operation during production.
2. This provides our Toolmakers the ability to efficiently remove the
   subtool if needed to perform adjustments or repairs in Die Maintenance.
   And the subtool can easily be placed back in the correct location on the
   progressive stamping die.

After the piercing operation is completed, a bubble of material is created
and then formed to match the other designed features of the breather
cover.

Within the first month of production, we were meeting production demands at 2,000 parts per hour without removing the subtool for repairs or adjustments.

The holes of the breather cover are checked with a customized gauge to verify their placement and inside diameters.