Browse Prior Art Database

Drilling Jig

IP.com Disclosure Number: IPCOM000075915D
Original Publication Date: 1971-Dec-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Fletcher, AT: AUTHOR

Abstract

Parts loaded in a jig prior to drilling are precisely positioned relative to three surfaces.

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Drilling Jig

Parts loaded in a jig prior to drilling are precisely positioned relative to three surfaces.

Holes are drilled in a part through bushings in a drill bushing fixture when the part is inside the fixture, as shown by dashed lines in Fig. 2. The part is moved into the fixture by pneumatically or hydraulically propelling the slide forward in the guide. In this position, three reference surfaces A, B, and C on the part contact corresponding fixture surfaces A', B', and C', to establish a precise and repeatable position of the part relative to the bushings. Surfaces A-A' and C-C' are held together when the slide cams the clamp block holding the part forward and upward. Surfaces B-B' are held together by the spring plunger "D". The spring plunger "E" serves to return the clamp block down the slide, when the slide is subsequently retracted.

Two complementary parts, intended for mating use, can be simultaneously loaded with precise alignment of all the holes in both parts by extending the jig base and mounting a duplicate fixture, guide, etc., back-to-back thereto.

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