Method and apparatus for forming spiral grooves internally in me

Details Method and apparatus for forming spiral grooves internally in me Method and apparatus for forming spiral grooves internally in me

1991-12-31

1994-07-12

Bray, W. Donald

Metal deforming

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

With tool surface orbiting around axis parallel to direction...

72 68, B21B 1500, B21B 1320

Patent

active

053277562

ABSTRACT:
A spinner means and method for forming spiral grooves on the interior surface of tubing including a groove forming means having a plurality of external spiral teeth which contact the tubing forming the grooves wherein said spiral teeth extend in the forward direction and have a helix angle which continually decreases in the forward direction. The method for forming the spiral grooves subjects the tubing interior surface of the tubing to the spinner means having teeth crests which engage the tubing surface when the tubing is being reduced in diameter using only radial forces acting on the crests of the teeth.

REFERENCES:
patent: 4646548 (1987-03-01), Zimmerli et al.
patent: 4854148 (1989-08-01), Mayer
patent: 4876869 (1989-10-01), Saeki et al.
patent: 4942751 (1990-07-01), Fuchs, Jr.

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