Expandable abrading tool and abrasive insert thereof

Details Expandable abrading tool and abrasive insert thereof Expandable abrading tool and abrasive insert thereof

1978-04-19

1980-04-29

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51364, 51370, 51206R, B24D 900

Patent

active

041999037

ABSTRACT:
An abrading tool (20, 20a, 20b) is disclosed as having a tapered arbor (22) and an abrasive insert 24 including a helical element (28) with a plurality of coils (30) that receive the arbor in an axially incompressibly mounted relationship. An abrasive strip (32) of a helical shape on the coils performs a machining operation upon tool rotation. The abrasive strip on each coil is spaced from the abrasive strip on adjacent coils. Nuts (40, 44, 46) threaded on the arbor provide a means for adjustably positioning the abrasive insert axially along the arbor to control the diameter of each coil in order to initially size the insert and to subsequently compensate for wear of the abrasive strip. Different embodiments disclosed include a helical spacer (34, 36) which spaces the coils of the helical element, coils which are directly engaged with each other and define a helical groove (64) that receives a spacer (66) located between the abrasive strip on each coil, and passages (56, 58, 60, 62) through the arbor and the insert for feeding fluid to the abrasive strip.

REFERENCES:
patent: 1792800 (1931-02-01), Birgbauer
patent: 1865229 (1932-06-01), Birgbauer
patent: 2115210 (1936-04-01), Mulholland
patent: 2725694 (1955-12-01), Lukens
patent: 3324607 (1967-06-01), Niemiec
patent: 3951619 (1976-04-01), Frangipane

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