Browse Prior Art Database

Riveting Tool

IP.com Disclosure Number: IPCOM000078545D
Original Publication Date: 1973-Jan-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Terry, WJ: AUTHOR

Abstract

Temporary efficient tacking of multiple sheets is accomplished, by drawing a copper washer through aligned holes and crimping the drawn portion to form an eyelet.

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Riveting Tool

Temporary efficient tacking of multiple sheets is accomplished, by drawing a copper washer through aligned holes and crimping the drawn portion to form an eyelet.

Sheets 1 with aligned holes 2 are positioned over opening 3 in support 4. A washer 5 of soft metal such as copper is placed over holes 2. Adjustable punch holder 6 is lowered so that clamping pad 7 grips the edge portion of washer 5, under the influence of spring 8. Guide tip 9 of round forming punch 10 freely enters the opening of the washer. As the forming punch is moved downward through punch holder 6 and support 4, a portion of the washer metal is drawn through holes 2 and along the side of the forming punch.

Continued downward movement causes punch 10 to simultaneously engage three pivoted pawls 11, which cam sleeve 12 upward against the force of spring
13. As the sleeve moves along punch 10, it forces the deformed washer metal upward to crimp the displaced metal at the underside of the stacked sheets. Withdrawal of forming punch 10 allows spring 13 to return sleeve 12 and release sheets 1.

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