Method of forming an interlocking metal joint

Details Method of forming an interlocking metal joint Method of forming an interlocking metal joint

1981-04-23

1983-05-17

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29524, 138166, B21D 3900, B23P 1100

Patent

active

043833543

ABSTRACT:
A metal structure such as a tube having an axial seam formed with interlocked tongues and recesses with in-plane stabilization created by locally moving areas of the metal out of plane to form dimple-like structures ("dimples") either before or after forming the tongues and recesses. After the tongues and recesses are interengaged, the dimples are flattened to cause the out-of-plane metal to return to the plane so that the metal adjacent to them is moved strongly laterally, and the walls of the tongues and recesses make a strong abutting fit against one another which resists relative out-of-plane displacement, thus providing "in plane" stabilization.

REFERENCES:
patent: 578801 (1897-03-01), Wilmot
patent: 2330207 (1943-09-01), England et al.
patent: 2762117 (1956-09-01), Houck
patent: 2860540 (1958-11-01), Karlsson
patent: 3004326 (1961-10-01), Merz
patent: 3094197 (1963-06-01), Attwood
patent: 3099238 (1963-07-01), Jones
patent: 3273601 (1966-09-01), De Gain

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