All issues
Volume 3 (1995)
- Issue 6 Pages 3-
- Issue 5 Pages 3-
- Issue 4 Pages 2-
- Issue 3 Pages 2-
- Issue 2 Pages 2-
- Issue 1 Pages 2-
Volume 3, Issue 3
Displaying 1-5 of 5 articles from this issue
- |<
- <
- 1
- >
- >|
-
Genichi Taguchi1995 Volume 3 Issue 3 Pages 2-6
Published: June 01, 1995
Released on J-STAGE: December 24, 2016
JOURNAL FREE ACCESSThe role of quality engineering is to give an effective simple measure of functional variation using signal-to-noise ratio from a set of all proposed data. On the case of earthquake prediction, it is recommended to use the Mahalanobis distance defined from all kinds of data, proposed by the person in-charge of prediction, where there was no earthquake during a certain future period.
The Mahalanobis distance calculated from the data where actually an earthquake happened is used as a response. Letting Mi be the magnitude of the (i-th) earthquake at the place and Yi the Mahalanobis distance to obtain the signal-to-noise ratio to judge the usefulness of the prediction.
View full abstractDownload PDF (1262K)
-
Chikara Tsutsui, Senyuu Taira, Hiroshi Shibano1995 Volume 3 Issue 3 Pages 22-27
Published: June 01, 1995
Released on J-STAGE: March 24, 2016
JOURNAL FREE ACCESSThe picture quality and reliability of dry developer for copy machines and printers heavily depend on the amount of functional material exposed to the surface of each toner particle. lt is very difficult to accurately measure the amount of exposed material and measurement is both expensive and time consuming. This study attempts to develop a measuring method for research of dry developer. In the study of this measuring method, we devised the means to measure the relative values instead of the true values and tried to stabilize the measuring results using parameter design. As a result, we have succeeded in stabilizing the method to measure a wide range of the amount of exposed material, and the success enabled us to use this measuring method for the process control in our production line as well as for our research works.View full abstractDownload PDF (1279K) -
Kiyoshi Koyama, Keiji Nakano1995 Volume 3 Issue 3 Pages 28-35
Published: June 01, 1995
Released on J-STAGE: March 24, 2016
JOURNAL FREE ACCESSWe, at Fujitsu Ten, manufacture and market various types of car audio products. ln those products, "filter circuits" are incorporated. ln many previous cases of audio designing, we had tailored new circuits to every new model being designed, which as a result made the whole designing process less effcient and time consuming. Recently, as an experimental stage, we have adopted a simulation method for development of filter circuits, in order to situate this method as a model case of future technical development. Now, we are pleased to introduce our "Two-Stage Design Method", which is based on the combination of "Parameter Design" and "Least Squares Estimation" , that had enabled us to newly develop a "general-purpose use " filter circuit best suited for technical development.View full abstractDownload PDF (1655K) -
Hideaki Shibata, Takayoshi Matsunaga, Chikara Asahara, Hideaki Tsuge, ...1995 Volume 3 Issue 3 Pages 36-43
Published: June 01, 1995
Released on J-STAGE: March 24, 2016
JOURNAL FREE ACCESSQuality engineering approaches were used to determine the optimum condition for an injection molding process which utilizes aluminium powder for the production of high (dimension) precision products. Prior to the experiment, a new metal mold was made to produce test pieces for dimensional evaluation. The most important factors from the whole process were selected and assigned to an L18 orthogonal array. Particle size was selected as the noise factor by using two types of aluminium powder with different particle sizes. An evaluation of transformability was made, i.e., the proportionality of the relationship between metal mold dimensions and final sintered product dimensions. As a result, the reproducibility of the optimum condition was confirmed. The dimensional variability of the sintered products was reduced to a fraction of four compared to the worst condition. Furthermore, the information with respect to the optimum condition wad applicable to the production of other metal powder products.View full abstractDownload PDF (1959K)
-
Ichizou Kawazoe, Masaru Kaneko1995 Volume 3 Issue 3 Pages 44-49
Published: June 01, 1995
Released on J-STAGE: March 24, 2016
JOURNAL FREE ACCESSIn the Process joining sheet materials, fasteners or welding are generally used. Fasteners are useful when connection and separation of sheet metals are required for maintenance. However, this approach is expensive. When welding is used, surface treatment such as painting or plating often follow. Therefor, it is not usually desirable for use on exterior components of a product. These disadvantages can be avoided by using the crimping process. ln this paper, a crimping process was studied to obtain stability of strength after crimping. The variability of crimping strength was reduced by one half after the optimization.View full abstractDownload PDF (1185K)
- |<
- <
- 1
- >
- >|