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Bearing staking process investigation using a designed experiment

Description: A designed experiment was performed on the staking operation of a miniature precision bearing. Three variables were controlled during the experiment: staking force, tool diameter, and bearing-to-wheel fit. The study showed that the current staking tool diameter is highly sensitive to staking force and to bearing-to-wheel fit, whereas a smaller diameter tool is not. The study also shows that, with the current process, bearing movement under a 100-Newton (N) force can be estimated at 0.009 in. to 0.0029 in. The current specification is 0.002 in. and should be revised to 0.0035 in. 4 figs.
Date: December 21, 1990
Creator: Armstrong, K.P.
Partner: UNT Libraries Government Documents Department

An investigation of bridge width measurement and processing capabilities (1985)

Description: An investigation of Mound`s ability to measure and process bridges was conducted in 1985. Prior to improvements in the measuring system and technique, bridge width was found to have a sigma of 0.00019 in. After improvements were made, a sigma of 0.000047 was realized. Bridge length was found to be more erratic than width, although most of the inaccuracy was caused by measurement uncertainty. Length and width were found to have little or no correlation.
Date: May 15, 1989
Creator: Armstrong, K.P.
Partner: UNT Libraries Government Documents Department

Kapton HN investigations

Description: Kapton HN properties and the properties of the slip additive calcium phosphate dibasic (CaHPO{sub 4}) were investigated. Impurity analyses were performed on the compound by inductively coupled plasma (ICP) and ion chromatography (IC). Other analyses on the slip additive included: processing solution -- dissolution analysis, high-explosive compatibility studies, scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and particle size distribution. Testing and analyses were also performed on Kapton HN film and other polyimide films that could serve as possible replacements for Kapton HN. The polyimide films that were tested are: Upilex-R, Upilex-S, Upilex-SGA, and Apical. The analyses performed were: infrared (IR), x-ray photoelectron spectroscopy (XPS), SEM/EDS, high-potential breakdown testing, (PVD) physical vapor deposition adhesion tests, and peel tests. Upilex-S flyer cables were also fabricated and successfully test fired. In addition to these raw material tests, production cables were chemically treated and destructively (high potential) tested. A long-term aging environment for production cables was also selected, and aging tests were begun. 9 figs., 7 tabs.
Date: September 28, 1990
Creator: Williams, M.K.; Huelskamp, M.A.; Armstrong, K.P.; Brandon, J.L.; Lavoie, J.M. (EG and G Mound Applied Technologies, Miamisburg, OH (USA)) & Smith, A.E. (Sandia National Labs., Albuquerque, NM (USA))
Partner: UNT Libraries Government Documents Department

A study of eddy current measurement (1986-1987)

Description: A study was conducted in 1986 to evaluate a modified eddy current system for measuring copper thickness on Kapton. Results showed a measurement error of 0.42 {mu}in. for a thickness range of 165 to 170 {mu}in. and a measurement variability of 3.2 {mu}in.
Date: June 22, 1989
Creator: Ramachandran, R.S. & Armstrong, K.P.
Partner: UNT Libraries Government Documents Department

A study of laseruler accuracy and precision (1986-1987)

Description: A study was conducted to investigate Laserruler accuracy and precision. Tests were performed on 0.050 in., 0.100 in., and 0.120 in. gauge block standards. Results showed and accuracy of 3.7 {mu}in. for the 0.12 in. standard, with higher accuracies for the two thinner blocks. The Laserruler precision was 4.83 {mu}in. for the 0.120 in. standard, 3.83 {mu}in. for the 0.100 in. standard, and 4.2 {mu}in. for the 0.050 in. standard.
Date: June 22, 1989
Creator: Ramachandran, R.S. & Armstrong, K.P.
Partner: UNT Libraries Government Documents Department

A study of microclad thickness variation (1987)

Description: A study was conducted to investigate the thickness variation of microclad material used in fabricating 1E38 bridges. For the role sampled (nine reels), standard deviations within reels ranged from 6.11 to 12.07 {mu}in. Thickness variations within reels ranged from 16.2 to 40.9 {mu}in., with the average thickness between 142.90 and 161.28 {mu}in.
Date: June 22, 1989
Creator: Ramachandran, R.S. & Armstrong, K.P.
Partner: UNT Libraries Government Documents Department