Multiple roll recorrugator

Details Multiple roll recorrugator Multiple roll recorrugator

1976-08-20

1977-06-21

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72107, 72179, 72465, B21D 1904

Patent

active

040303306

ABSTRACT:
The invention concerns an apparatus for forming annular circumferential corrugations in the end of a helically corrugated seamed pipe. Two corrugating rolls, a backup roll and a thrust roll, engage the wall of the pipe to form the annular corrugations. The backup roll normally engages the inner wall of the pipe, and the thrust roll, the outer wall. The thrust roll is formed from a plurality of independent and transversely movable roll sections urged with a predetermined force into engagement with the pipe by a support composed of a group of rolls engaging the periphery of a corresponding roll section and mounted within a pivotable lever frame. The predetermined force is provided by a pressure-controlled hydraulic cylinder acting through each of the lever frames.

REFERENCES:
patent: 837756 (1906-12-01), Thomas
patent: 2170946 (1939-08-01), Grief
patent: 2292851 (1942-08-01), Tykal
patent: 2326076 (1943-08-01), Solem
patent: 3464253 (1969-09-01), Beyer et al.
patent: 3485076 (1969-12-01), Colburn

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