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DTC Products Offers Next Generation Slug Retention Machine
DTC’s new Rev 3 slug retention machine uses a pneumatically-powered grinder to precisely machine a small angled groove into the sidewall of the die cavity in a stamping die in order to prevent slugs from pulling onto the die surface where they can damage the metal strip, the stamped part, or the stamping die itself.
Photo courtesy of DTC Products Corporation.
ST. CHARLES, Ill. — DTC Products recently announced that it has introduced a new and upgraded version of its original patented slug retention machine—the Rev 3. The new device uses a pneumatically-powered grinder to precisely machine a small angled groove into the sidewall of the die cavity in a stamping die in order to prevent slugs from pulling onto the die surface, where they can damage the metal strip, the stamped part, or the stamping die itself.
Additions and changes to the original design of the popular device (Rev 2) include one thumb screw to quickly adjust the grinder height (replacing the previous four socket head cap screws), a plunger style grinder head assembly (replacing the earlier turn knob to control the up and down movement), and a grinder head adjustable depth stop to control the grinder’s depth into the die cavity. Each of these features helps the operator quickly and more accurately position and control the grinder position.
In addition, DTC has made the grinder assembly adjustable to three height positions, each ½ inch apart, enabling it to work with a wider range of part thicknesses. The company has also changed the lights to flex lights, which the operator can position to see clearly into the cavity.
The groove produced by the grinder is 0.025mm to 0.127mm deep and machined at an angle of 3-5 degrees to the die surface, which creates a precise amount of slug interference. During stamping, slugs expand into precision grooves that prevent them from pulling out of the die cavity and onto the die surface. This could cause expensive damage to the stamping die or to parts that will have to be scrapped.
The new Rev 3 version of the Slug Retention Machine retains the primary features of the original: it’s the same compact size (4 inches wide x 14 inches long x 8inches tall). And its easy maneuverability and adjustability enable it to be used to machine grooves into a die while it is still in the stamping press, as long as the shut height and/or slide adjustment allows for the height of the Slug Retention Machine. This eliminates the need to remove the die from the press, disassemble it, and return it to the press after reworking it, according to DTC Products (dtcproductscorp.com).
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