Browse Prior Art Database

Manufacturing Zero Defect I/O Pins

IP.com Disclosure Number: IPCOM000034818D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Buchmann, AH: AUTHOR [+4]

Abstract

This article describes a machine for forming heads on input/output (I/O) pins wherein a pneumatically driven punch causes forming of the head. Referring to the drawings, Fig. 1 is a side view of the machine disclosed herein. Figs. 2 through 7 show the successive steps in forming a head on a pin as follows: 1. A precise length of wire is fed into a stationary shank bushing A and movable heading bushing B by a wire feed mechanism (not shown). As the A and B bushing assembly is moved along stationary rail C, a length of wire (pin) is cut off. (Image Omitted) 2. The initial motions of the tooling are to compress the pin with a punch D to fill the cavities of both bushings (Fig. 2). 3.

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Manufacturing Zero Defect I/O Pins

This article describes a machine for forming heads on input/output (I/O) pins wherein a pneumatically driven punch causes forming of the head. Referring to the drawings, Fig. 1 is a side view of the machine disclosed herein. Figs. 2 through 7 show the successive steps in forming a head on a pin as follows: 1. A precise length of wire is fed into a stationary shank bushing A and movable heading bushing B by a wire

feed mechanism (not shown). As the A and B

bushing assembly is moved along stationary rail C,

a length of wire (pin) is cut off.

(Image Omitted)

2. The initial motions

of the tooling are to compress the pin

with a punch D to fill the cavities of both

bushings (Fig. 2). 3. As the motions continue bushing B begins to move away from bushing A as punch D continues to compress the pin

to begin the heading and allowing the material to

flow between the bushings (Fig. 3). These motions

continue until the initial head is accomplished

and bushing B and punch D are flush at top of the

pin head (Fig. 4). Clearance tolerance between

bushing B and punch D must be less than .0001" to

avoid extruding metal. The portion of pin which

forms the head is supported within bushing B to

avoid buckling of wire. Also, once wire forming

is started, forming motions are uninterrupted

through to initial head form. The continuous

forming motions are required to avoid undesirable

forms which occur if the process is intermittent,

allowing the material...