Browse Prior Art Database

Sheet Metal Forming Die

IP.com Disclosure Number: IPCOM000094219D
Original Publication Date: 1966-Jul-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Adams, JM: AUTHOR [+2]

Abstract

This die forms a U-channel cross-section, having a high depth to width ratio, in a single stroke. The die comprises punch 1 movable vertically relative to base 2 that has floating inserts 3 mounted on it. Inserts 3 and base 2 engage along a sloping surface and have interfitting projections and grooves, These allow inserts 3 to move from their normal lower position upwardly and outwardly during the forming process.

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Sheet Metal Forming Die

This die forms a U-channel cross-section, having a high depth to width ratio, in a single stroke. The die comprises punch 1 movable vertically relative to base 2 that has floating inserts 3 mounted on it. Inserts 3 and base 2 engage along a sloping surface and have interfitting projections and grooves, These allow inserts 3 to move from their normal lower position upwardly and outwardly during the forming process.

In operation, sheet metal blank 4 is placed beneath the raised punch 1. As the latter moves downwardly, it forces blank 4 into the opening between inserts 3. The resistance of blank 4 to bending causes inserts 3 to spread apart and thus increase the width opening. This action reduces the friction and pressure upon blank 4 and minimizes any local stretching.

As punch 1 moves downwardly and approaches the bottom of the die, inserts 3 are cammed downwardly and inwardly. When punch 1 bottoms, the four right- angle bends are set. Then when punch 1 is raised, inserts 3 spread slightly to allow the finished part to drop from punch 1.

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