Browse Prior Art Database

Pin-Straightener Tool

IP.com Disclosure Number: IPCOM000039188D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Chiavelli, R: AUTHOR [+4]

Abstract

A tool has been developed for straightening bent module pins on semiconductor modules. The air-operated machine uses a rotating plate to straighten bent pins without contacting those that are already straight. The machine functions to move the bent module pins which do not (Image Omitted) meet specifications to the correct centerline. They are then rotated about their centers to stress relieve them prior to ending the cycle back at the zero position. Referring to Fig. 1, the pinned module 11 (pins not shown) is locked into a template 1. An offset air cylinder 2, activated by a valve 9, moves the form plate 3 to the edge of the pins, moving them to the correct centerline position. A second air cylinder 4, activated by valve 10, drives a rack and pinion 5, providing rotation to an eccentric shaft 6.

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Pin-Straightener Tool

A tool has been developed for straightening bent module pins on semiconductor modules. The air-operated machine uses a rotating plate to straighten bent pins without contacting those that are already straight. The machine functions to move the bent module pins which do not

(Image Omitted)

meet specifications to the correct centerline. They are then rotated about their centers to stress relieve them prior to ending the cycle back at the zero position. Referring to Fig. 1, the pinned module 11 (pins not shown) is locked into a template 1. An offset air cylinder 2, activated by a valve 9, moves the form plate 3 to the edge of the pins, moving them to the correct centerline position. A second air cylinder 4, activated by valve 10, drives a rack and pinion 5, providing rotation to an eccentric shaft 6. This drives a gear with gearbelt 7 which, in turn, drives another eccentric shaft 8. The form plate is thereby rotated 360o . After one revolution the pins will be back to the original position. The step-by-step procedure is indicated in Fig. 2 with the form plate 3 shown in Step 1 with the form plate hole 12 and an ideal tolerance zone 13 as indicated (the ideal tolerance zone 13 is the area that the pins should ultimately occupy after straightening). In Step 2, the cylinder will have moved the form plate so that the form plate hole 12 will be at the edge of the tolerance zone 13. The eccentric action imparted to the form plate will provide the 36...