Mandrel for processing a workpiece with an internal spline

Details Mandrel for processing a workpiece with an internal spline Mandrel for processing a workpiece with an internal spline

1994-02-07

1997-01-21

Watson, Robert C.

Work holders

Holder inserted within work aperture

Expandable mandrel

269 63, 279 212, 279 217, B23Q 314

Patent

active

055953760

ABSTRACT:
A mandrel for use in processing a workpiece having an internal spline. The mandrel includes an expandable collet having an upper expandable spline-shaped portion and a lower portion with a groove adapted to receive two half-keys. Inside the expandable collet are a series of sleeves and steel balls. A bolt having a conical head and a nut hold the mandrel together. As the nut is tightened, the sleeves and balls cause the upper spline-shaped portion of the collet to expand to hold a workpiece having an internal spline. At the same time, the half-keys are forced apart in the key-way of an indexing rotary table to accurately position the mandrel on the table.

REFERENCES:
patent: 2960342 (1960-11-01), Raper
patent: 2992787 (1961-07-01), Craig
patent: 4712720 (1987-12-01), Tesch
patent: 4916792 (1990-04-01), Haubus
patent: 5012566 (1991-05-01), Getz
patent: 5074536 (1991-12-01), McConkey

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