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Adjustable Spring Vibration Dampening Device

IP.com Disclosure Number: IPCOM000050856D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Elliot, WC: AUTHOR [+3]

Abstract

A dampening device minimizes or eliminates the spring vibration during the free length sensing by the electronic gage. This permits a more accurate measurement of the spring's free length at the time of manufacture.

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Adjustable Spring Vibration Dampening Device

A dampening device minimizes or eliminates the spring vibration during the free length sensing by the electronic gage. This permits a more accurate measurement of the spring's free length at the time of manufacture.

In the manufacturing of close-tolerance compression springs, the spring's free length can be automatically gaged during coiling. Based on the free length measurement, the machine can automatically compensate to keep the spring within a predefined dimensional range. A tight tolerance on the free length of the spring requires that the sensitivity of the automatic gaging be increased which, in turn, reduces the sense field in which the spring is gaged. A dampening member 10 keeps the spring within the sense field near the sensing probe 12 by minimizing vibration. This device may be installed on a standard automatic spring coiling machine and used with conventional electronic spring gages. The natural tendency of the spring 14 is to swing about the winding axis as it emerges from the winder 16 and thus not engage the sensing probe 12 on a line between the probe 12 and the winder 16, thereby giving a false indication of length. The damper 10 will reduce such vibratory deviation of the spring 14 and more closely control the position of the spring during winding and sensing.

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