Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent
1976-04-15
1978-02-07
Kelly, Donald G.
Metal deforming
By use of roller or roller-like tool-element
With tool inside hollow work
72 52, 72370, 228 19, 228125, B23K 3700, B23K 3106
Patent
active
040720357
ABSTRACT:
The longitudinal welding seam of a tube is subjected to flexing to obtain strengthening by up and down bending followed by one or multiple stage rolling which in turn is followed by sizing.
REFERENCES:
patent: 1611875 (1926-12-01), Belmont
patent: 3590622 (1971-07-01), Elge et al.
patent: 3716908 (1973-02-01), Rowell
Schatz Friedrich
Ziemek Gerhard
Kabel-und Metallwerke
Kelly Donald G.
Ramsey K. J.
Siegemund Ralf H.
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