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Volume 8 (2000)
- Issue 6 Pages 8-
- Issue 5 Pages 5-
- Issue 4 Pages 8-
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- Issue 2 Pages 5-
- Issue 1 Pages 5-
Volume 8, Issue 1
Displaying 1-9 of 9 articles from this issue
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6. Manufacturing Technology and Quality EngineeringGenichi Taguchi2000Volume 8Issue 1 Pages 5-10
Published: February 01, 2000
Released on J-STAGE: December 24, 2016
JOURNAL FREE ACCESSIn order to increase market share, the most important strategy is to set the price at competitive level. How to reduce production cost without affecting the quality of the product is the role of manufacturing engineers. In this article, the methods are explained with two actual case studies. Both cases were conducted at laboratory before manufacturing process design using either test pieces or small scale experimental facility such as flask and resulted more than ten times improvement in manufacturing speed to give the scale of production facility less than one-tenth as that was expected. The most important role of Quality Engineering is to improve uniformity of manufacturing variation without actual production processes.
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Kazuhito Takahashi, Shinji Kousaka, Kiyoharu Hoshiya, Kouya Yano, Nori ...2000Volume 8Issue 1 Pages 24-30
Published: February 01, 2000
Released on J-STAGE: June 10, 2016
JOURNAL FREE ACCESSWhen developing machining processes, it is necessary to select the optimum machining conditions (such as tool conditions, cutting speed or feeding speed), as well as select an efficient machine and process to be used. Quality engineering methodology recommends evaluating the performance of machining milling or drilling processes by directly or indirectly observing the energy consumption. In this study, the evaluation of machining a stainless steel part was made by measuring the total power consumption of the main motor. However, the gain was not very reproducible. Therefore, the variation of the energy consumed during idling time was included in evaluation. The results showed a good reproducibility of gain. Under the optimum conditions, the dimensions after machining were uniform and the surface roughness was also improved.View full abstractDownload PDF (1643K) -
Toshichika Hirano, Kenichi Mizuno, Kouji Sekiguchi, Takayoshi Matsunag ...2000Volume 8Issue 1 Pages 31-37
Published: February 01, 2000
Released on J-STAGE: June 10, 2016
JOURNAL FREE ACCESSToday, most of industrial waste goes to land fills. It is becoming more and more difficult to provide such lands for this purpose. One type of industrial waste is the waste from glass manufacturing factories. Since the composition of such waste is similar to the one in the manufacturing of ceramic-type tiles, research was conducted to develop the manufacturing of the tiles to use such waste as raw materials. In the discussion of the ideal situation in this study, it was concluded that the density within a molded piece must be uniform. Based on this conclusion, the weight of a molded piece measured in the air was defined as the input, and the one measured underneath the water as the output. The generic function is therefore the input and the output must be linear. After optimization, the gain of SN ratio and sensitivity were well confirmed. As a result, we succeeded in being able to produce tiles using less virgin raw materials and more wasted materials.View full abstractDownload PDF (1521K) -
Kazuyoshi Ichikawa, Shinichi Kazashi, Moritugu Toushi, Norio Sumita2000Volume 8Issue 1 Pages 38-44
Published: February 01, 2000
Released on J-STAGE: June 10, 2016
JOURNAL FREE ACCESSIn this study, the function of a turning process was optimized by the evaluation of electric power consumption during OFF and ON modes, and evaluation by processed dimensions. In the evaluation of electric energy, the SN ratio of OFF and ON modes were used in the analysis with a good reproducibility of gain. After optimization, a high speed and stable processing condition was established which resulted in a significantly high productivity and low cost. It was recognized that the conclusions from a study using test pieces will be universal, and the conclusions can be applied well to other equipment.View full abstractDownload PDF (1607K) -
Yoshiko Hasegawa, Isamu Kabe, Kazuko Noji, Tatsuji Kanetaka2000Volume 8Issue 1 Pages 45-50
Published: February 01, 2000
Released on J-STAGE: June 10, 2016
JOURNAL FREE ACCESSThe objective of this study is to improve the reliability of the final diagnosis for a health examination. For this type of study, the inverse matrix of a correlation matrix is calculated, followed by the use of an orthogonal array to select the contributing variables (also called items). In this study however, the Schmidt orthogonalization method was used to select the important variables for reliability improvement and cost reduction. As a result, the Signal-to-Noise ratio increased by 12.6 db after reducing the number of variables from 141 to 79. Naturally, the reliability of diagnosis was improved. Moreover, the Loss Function was used for its economic evaluation.View full abstractDownload PDF (1232K) -
Eiji Okabayashi, Taizou Oonishi, Toshio Takaki2000Volume 8Issue 1 Pages 51-59
Published: February 01, 2000
Released on J-STAGE: June 10, 2016
JOURNAL FREE ACCESSIn order to save energy for copy machines and printers, a new fusing system was developed using a resistant heater that could be warmed up in a short period of time. Only one year was pent for development. The new fusing system was divided into sub-systems, i.e., power supply system,heating system, separating system and temperature measuring system. Parameter design was performed for each sub-system using four types of test pieces.View full abstractDownload PDF (1827K) -
Kei Takada, Masaru Uchikawa, Kazuhiro Kajimoto, jun-ichi Deguchi2000Volume 8Issue 1 Pages 60-64
Published: February 01, 2000
Released on J-STAGE: June 10, 2016
JOURNAL FREE ACCESSThis paper reports a trial case of software debugging experiment using an orthogonal array, the method suggested by Genichi Taguchi. The signal factors that can be input by the user were assigned to an L18 orthogonal array, and their combinations were tested. The beta-version of a software which was developed in our company was used. As a result, the bugs generated from the combinations were efficiently discovered from a small number of tests.View full abstractDownload PDF (1114K) -
-A Software Study for the Future Spacecraft (Part II)-Rika Matsuda, Yoshiki Ikeda, Takashi Kamoshita, Kazayuki Tobara2000Volume 8Issue 1 Pages 65-69
Published: February 01, 2000
Released on J-STAGE: June 10, 2016
JOURNAL FREE ACCESSThe feasibility of applying Mahalanobis Taguchi System (MTS) to the Fault Diagnosis Program (FDP) is being studied. In our previous paper, estimated errors were used as Items to calculate the Mahalanohis space, and the possibility of fault identification was studied. In this paper, fault detection was studied and to solve the problem of Item's high correlation, three methods were proposed and discussed.View full abstractDownload PDF (977K) -
Kaoru Tsunematsu, Kengo ouchi2000Volume 8Issue 1 Pages 70-76
Published: February 01, 2000
Released on J-STAGE: June 10, 2016
JOURNAL FREE ACCESSThis paper reports the application of quality engineering methods on the screen adhesion process for a drum unit, which is an important component part of digital printers. The thermo-pressing type adhesion process was studied. The functions of thermal transfer and thermal radiation were used for evaluation.View full abstractDownload PDF (1530K)
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