Method and apparatus for producing undercut grooves

Details Method and apparatus for producing undercut grooves Method and apparatus for producing undercut grooves

1997-02-20

1999-08-03

Pitts, Andrea L.

Gear cutting, milling, or planing

Milling

Process

407 34, 408227, B23C 130

Patent

active

059316160

ABSTRACT:
In the production of rotor grooves, between the usual undercut-free opening of the groove with a disk milling cutter and profile milling by means of a high speed, high performance steel profile shaft milling cutter, a preliminary fine cutting operation is inserted, in which the profile form is premachined with a profile shaft milling cutter equipped with indexable cutting bits. The profile shaft milling cutter used for the purpose has a greater number of cutting surfaces at its tooth tips than at its tooth flanks. The cutting surfaces defined by overlapping, in circumferential direction, of the cutting edges of the indexable cutting bits are interrupted, so that substantially flat and hardly stiff chips are produced.

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Schulte "Numerisch gesteuertes Rotornut-Frasen" ("Numerically controlled milling of rotor grooves") VDI-Z., vol. 126, No. 5, Mar. 1984. Dusseldorf, Germany, pp. 128-131.
"Methoden und Maschinen zur Frasbearbeitung von Generator-und Turbinenrotoren" (Methods and Machines for Milling Generator and Turbine Rotors), Ing. (grad.) Siegfried Neumann, Special Publication No. 9 of Kollmann Maschinenbau GmbH, 5602 Langenberg/Rhld. (1969).

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