PRECISION HOLDING AND LOCATING PIN
First Claim
1. An expansion pin, comprising:
- a cylindrical body having a sidewall and an interior cavity extending from a top end towards a bottom end of the cylindrical body, aa plurality of slots defined in a top end of the cylindrical body and radially emanating from the interior cavity through the sidewall, the plurality of slots defining a plurality of gripping fingers around a circumference of the sidewall,a tapered surface portion converging inwardly along an interior face of the plurality of gripping fingers; and
a bolt having a frusto-conical head that converges inwardly from a top end of the bolt and terminates at a shank of the bolt, the shank having a plurality of external threads, wherein the frusto-conical head urges the plurality of griping fingers radially outwardly when the bolt is threadingly tightened to draw the frusto-conical head within the tapered surface portion of the cylindrical body.
1 Assignment
0 Petitions
Accused Products
Abstract
A readily removable expanding precision holding and locating pin for securing parts to a work surface or assembly. This device works equally well as a threaded in insert with controlled fit counter bore, press fit or controlled fit bore, a taper fit etc. allowing the device to be used in many standard fixtures without modification the fixture, for example, tombstone fixtures mounted on horizontal machining centers. The device itself can be furnished as an oversize mandrel that can be machined to less than 50% of its original diameter. The device holds and can position in the X, Y, Z, directions and also resists rotation along the C/L Axis.
9 Citations
10 Claims
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1. An expansion pin, comprising:
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a cylindrical body having a sidewall and an interior cavity extending from a top end towards a bottom end of the cylindrical body, a a plurality of slots defined in a top end of the cylindrical body and radially emanating from the interior cavity through the sidewall, the plurality of slots defining a plurality of gripping fingers around a circumference of the sidewall, a tapered surface portion converging inwardly along an interior face of the plurality of gripping fingers; and a bolt having a frusto-conical head that converges inwardly from a top end of the bolt and terminates at a shank of the bolt, the shank having a plurality of external threads, wherein the frusto-conical head urges the plurality of griping fingers radially outwardly when the bolt is threadingly tightened to draw the frusto-conical head within the tapered surface portion of the cylindrical body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification