Method and device for finishing by burnishing of a helical threa

Details Method and device for finishing by burnishing of a helical threa Method and device for finishing by burnishing of a helical threa

1984-04-03

1987-11-17

Larson, Lowell A.

Metal deforming

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

During rotation of work

72102, B21H 302

Patent

active

047064838

ABSTRACT:
In accordance with the invention, a wheel (16) is used as the burnishing wheel for a helical thread, the periphery of which wheel has a profile whose shape matches that of the thread to be surfaced. The wheel (16) is mounted such that it rotates freely about an axis which is inclined with respect to the axis of the screw (10) which is caused to rotate about its own axis. The wheel (16) is applied in a resilient manner to the screw (10) by means of a compression spring (56) which pushes the pivoting support (18) of the wheel (16) in the direction of the screw (10). The carriage (20) on which the support (18) is pivotably mounted is freely displaceable in translation parallel to the axis of the screw (10) on a rail (22). The invention may be used for finishing by means of burnishing of a helical thread using an automatic repetitive cycle comprising a predetermined number of passes of a burnishing wheel along the thread.

REFERENCES:
patent: 631159 (1899-08-01), Echols
patent: 1365386 (1921-01-01), Djidics
patent: 1878117 (1932-09-01), Diescher et al.
patent: 3877273 (1975-04-01), Culver
Machinenmarkt Industrie Journal, vol. 77, No. 12, 1971 (Wuerzburg, DE), G. Felgentreu et al.: "Mikroverfeinerung durch Walzen", pp. 239 to 240, with English translation.
Soviet Engineering Research, vol. 2, No. 5, pp. 7-8, May 1982.

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