Method of determining minimum number of segments for collet for

Details Method of determining minimum number of segments for collet for Method of determining minimum number of segments for collet for

1991-10-01

1992-06-23

Bishop, Steven C.

Chucks or sockets

Socket type

Spring biased jaws

279142, B23B 3120

Patent

active

051236630

ABSTRACT:
A method of determining the minimum number of segments of a metal collet for a cutting tool holder having a truncated conical portion having a small-diameter end and a cylindrical portion connected to the small-diameter end. The collet is formed with slits extending axially inwards from the opening thereof for inserting a cutting tool and arranged at equal angular intervals. The slits extend to the cylindrical portion. The minimum number of segments is determined to be within the range where the geometrical moment of inertia of the section with respect to a line which passes through the centroid of the section and is perpendicular to a radical direction of the collet, as plotted against the number of segments, becomes substantially constant. With this arrangement, each segment has a suitable deflectability so that the collet can grip a cutting tool with sufficient force and accuracy and over a wide chucking range.

REFERENCES:
patent: 3246903 (1966-04-01), Sattler
patent: 3583714 (1971-06-01), Weltzer et al.

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