Browse Prior Art Database

Method of Joining

IP.com Disclosure Number: IPCOM000091682D
Original Publication Date: 1968-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Adams, JM: AUTHOR [+2]

Abstract

Connector 10 permits fabricating machine frames without the necessity of welding. Connector 10 is hardened steel and plated with a thin, 0.0001 inch copper layer and is generally cylindrical in shape. First and second radial grooves 12 and 14 are adjacent each end of connector 10. Raised ridges 16 and 18 are located centrally of its respective grooves. Ridges 16 and 18 have sharpened edges. Hollow steel frame members 20 and 22 are telescoped over the ends of connector 10. Tool steel blades 24 and 26 then apply approximately 200,000 pounds per square inch pressure on opposed sides of each frame member over each groove, forcing the frame members inwardly into the grooves to achieve a mechanical interlock between the frame members and connector. The ridges bite into the frame members under the high pressure.

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Method of Joining

Connector 10 permits fabricating machine frames without the necessity of welding. Connector 10 is hardened steel and plated with a thin, 0.0001 inch copper layer and is generally cylindrical in shape. First and second radial grooves 12 and 14 are adjacent each end of connector 10. Raised ridges 16 and 18 are located centrally of its respective grooves. Ridges 16 and 18 have sharpened edges. Hollow steel frame members 20 and 22 are telescoped over the ends of connector 10. Tool steel blades 24 and 26 then apply approximately 200,000 pounds per square inch pressure on opposed sides of each frame member over each groove, forcing the frame members inwardly into the grooves to achieve a mechanical interlock between the frame members and connector. The ridges bite into the frame members under the high pressure. Since the copper plating has a lower yield point than the steel frame members, the copper flows into and is trapped within surface asperities in the frame members adjacent the ridges. This resulting union of copper plating and steel frame member assures a gas tight joint and good electrical contact between connector 10 and members 20 and 22.

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