Single pass boring, skiving and roller burnishing tool

Details Single pass boring, skiving and roller burnishing tool Single pass boring, skiving and roller burnishing tool

1984-09-14

1986-03-11

Vlachos, Leonidas

Metal working

Burnishing

Of water laid fibrous article

72122, 407 1, 408 22, 408130, B24B 3900, B24B 3902

Patent

active

045744424

ABSTRACT:
A boring, skiving, and roller burnishing tool includes means for boring, skiving, and burnishing a cylindrical hole in a workpiece. The boring means comprises a plurality of cutting blades oriented at a particular angle to remove a relatively large amount of material from the hole. The roller burnishing means includes a roller race having a central axis and a frustoconical outer surface tapering radially outward and axially forward. Rollers are arranged about the outer surface of the race for rolling engagement with the internal surface of the hole. The smaller ends of the rollers face forward, and the taper of the rollers is such that the outermost surface portion of each roller is parallel to the central axis of the race. The rollers are biased in the forward direction using a roller pusher with a chosen force so that the force exerted on the internal surface of the hole remains constant over a range of sizes of the hole. The skiving means includes a retractable knife having a pair of radially extendible knife holders defining a camming path having an axial portion and an angled portion. A push dart has a camming element with complementary camming surfaces which ride along the camming path. Axial actuation of the push dart causes the knife holders to extend radially into a stable, locked position.

REFERENCES:
patent: 3762828 (1973-10-01), Faber
patent: 3795957 (1974-03-01), Steusloff
patent: 4133089 (1979-01-01), Heymanns
patent: 4184794 (1980-01-01), Henninghaus
patent: 4367576 (1983-01-01), Dickinson
patent: 4380851 (1983-04-01), Dickinson
patent: 4425693 (1984-01-01), Dickinson

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