{"title":"Life Test of Ceramic Ball Bearings by Staircase Method","authors":"Shigeki Ichikawa, H. Ona, Juhartono, I. Yoshimoto","doi":"10.2493/JJSPE.61.1740","DOIUrl":"https://doi.org/10.2493/JJSPE.61.1740","url":null,"abstract":"","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"64 1","pages":"259-260"},"PeriodicalIF":0.0,"publicationDate":"1995-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89055502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Hara, K. Numata, H. Iwata, Satoru Shinada, Ryuichi Inoue
{"title":"System for inspecting defects on the inner wall of high-aspect-ratio through-holes in printed circuit boards","authors":"H. Hara, K. Numata, H. Iwata, Satoru Shinada, Ryuichi Inoue","doi":"10.2493/JJSPE.61.80","DOIUrl":"https://doi.org/10.2493/JJSPE.61.80","url":null,"abstract":"","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"1 1","pages":"247-252"},"PeriodicalIF":0.0,"publicationDate":"1995-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83909458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A study on evaluation of circularity and related features for eccentric cam shaft (2nd report) : measured results and discussion","authors":"T. Tsukada, Yu Dahai","doi":"10.2493/jjspe.59.417","DOIUrl":"https://doi.org/10.2493/jjspe.59.417","url":null,"abstract":"","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"38 1","pages":"150-155"},"PeriodicalIF":0.0,"publicationDate":"1995-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73670635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A non-destructive testing technique for a crack existing randomly on a ferrite surface has been developed. Wher the sample is immersed into the volatile solvent, the solvent penetrates into the crack. The surface of sampl? becomes dry quickly, however the solvent remains in the crack and evaporates slowly. The crack is detected independently its position by detecting the evaporating gas from the crack. A FID (flame ionization detector) iE used to detect the extremely thin solvent gas. The optimum treatments from immersion treatment to sealing treatment are studied using several samples with the crack width from 0.003 mm to 0.06 mm. A lot of cracks ar? tested using the experimental apparatus. Experimental results show that a linear relationship is established between crack width and S/N ratio, and the detectable crack length varies inversely with the crack width, fot example in case the surface area is 250 mm2, the minimum detectable length with crack width 0.05 mm is 0.3 mm and that with 0.003 mm is 1.4 mm.
{"title":"Study for Crack Detection Technique on Black Color Ceramics using FID","authors":"Takaharu Yoshimura, N. Akiyama, M. Yoshida","doi":"10.2493/JJSPE.61.657","DOIUrl":"https://doi.org/10.2493/JJSPE.61.657","url":null,"abstract":"A non-destructive testing technique for a crack existing randomly on a ferrite surface has been developed. Wher the sample is immersed into the volatile solvent, the solvent penetrates into the crack. The surface of sampl? becomes dry quickly, however the solvent remains in the crack and evaporates slowly. The crack is detected independently its position by detecting the evaporating gas from the crack. A FID (flame ionization detector) iE used to detect the extremely thin solvent gas. The optimum treatments from immersion treatment to sealing treatment are studied using several samples with the crack width from 0.003 mm to 0.06 mm. A lot of cracks ar? tested using the experimental apparatus. Experimental results show that a linear relationship is established between crack width and S/N ratio, and the detectable crack length varies inversely with the crack width, fot example in case the surface area is 250 mm2, the minimum detectable length with crack width 0.05 mm is 0.3 mm and that with 0.003 mm is 1.4 mm.","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"1 1","pages":"318-324"},"PeriodicalIF":0.0,"publicationDate":"1995-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89659811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shizuichi Higuchi, Kiho So, Yoshio Saito, T. Hanaoka
Improvements on Belt Machined Surface Flatness by Using Fuzzy Inference Kiho So, Shizuichi HIGUCHI, Yoshio SAITO and Tadaaki HANAOKA In belt grinding, the amount of heat generated throughout the grinding process is basically less compared with that of the grinding wheel. However, when heavy grinding conditions are selected for obtaining high machining efficiency, the flatness error of the belt machined surface gets considerably larger than under normal conditions because of the high level of heat generation. Therefore, for reducing this flatness error, the depth of cut of the abrasive belt calculated by fuzzy inference was applied to the workpiece surface. In order to do this, the trace curves of abrasive belt on the workpiece surface were calculated by using fuzzy inference, rules of which were decided from simple models based on the basic grinding experiments. As a result, the accuracy of machined surfaces were improved significantly, and the propriety of applying this method for belt grinding was confirmed.
{"title":"Improvements on Belt Machined Surface Flatness by Using Fuzzy Inference Based on a Simulational Method","authors":"Shizuichi Higuchi, Kiho So, Yoshio Saito, T. Hanaoka","doi":"10.2493/JJSPE.59.257","DOIUrl":"https://doi.org/10.2493/JJSPE.59.257","url":null,"abstract":"Improvements on Belt Machined Surface Flatness by Using Fuzzy Inference Kiho So, Shizuichi HIGUCHI, Yoshio SAITO and Tadaaki HANAOKA In belt grinding, the amount of heat generated throughout the grinding process is basically less compared with that of the grinding wheel. However, when heavy grinding conditions are selected for obtaining high machining efficiency, the flatness error of the belt machined surface gets considerably larger than under normal conditions because of the high level of heat generation. Therefore, for reducing this flatness error, the depth of cut of the abrasive belt calculated by fuzzy inference was applied to the workpiece surface. In order to do this, the trace curves of abrasive belt on the workpiece surface were calculated by using fuzzy inference, rules of which were decided from simple models based on the basic grinding experiments. As a result, the accuracy of machined surfaces were improved significantly, and the propriety of applying this method for belt grinding was confirmed.","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"32 1","pages":"29-35"},"PeriodicalIF":0.0,"publicationDate":"1995-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82749355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Study on Evaluation of Circularity and Related Features for Eccentric Cam Shaft (1st Report) -Development of Algorithm and Its Simulation-","authors":"T. Tsukada, Yu Dahai","doi":"10.2493/JJSPE.58.2105","DOIUrl":"https://doi.org/10.2493/JJSPE.58.2105","url":null,"abstract":"","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"54 1","pages":"80-85"},"PeriodicalIF":0.0,"publicationDate":"1995-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84495063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Negishi, Ando Manabu, M. Takimoto, Akinobu Deguchi, Norio Nakamura
{"title":"Studies of super-smooth polishing on aspherical surfaces","authors":"M. Negishi, Ando Manabu, M. Takimoto, Akinobu Deguchi, Norio Nakamura","doi":"10.2493/JJSPE.61.1393","DOIUrl":"https://doi.org/10.2493/JJSPE.61.1393","url":null,"abstract":"","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"21 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"1995-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81642422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article deals with calculation of three-dimensional sphericity values from minimum circumscribing and maximum inscribing centres, although ISO and JIS define two-dimensional sphericity by means of two or three roundness measurements from minimum circumscribing centre. One of the reasons is the difficulties of measuring technique for the whole spherical surface. In this article, the data to be referred is simulated by applying surface harmonics (Laplace's spherical function). Downhill simplex method, one of nonlinear optimization techniques, is applied for search of minimum circumscribing and maximum inscribing centres. Then, their application conditions are investigated. Furthermore, two- and three-dimensional values of the spherical form errors are compared. In the future, further evaluation methods should be studied for actual three-dimensionally measured spherical form errors.
{"title":"Computation of Sphericity from Minimum Circumscribing and Maximum Inscribing Centers by Means of Simulation Data and Downhill Simplex Method","authors":"T. Kanada","doi":"10.2493/JJSPE.61.646","DOIUrl":"https://doi.org/10.2493/JJSPE.61.646","url":null,"abstract":"This article deals with calculation of three-dimensional sphericity values from minimum circumscribing and maximum inscribing centres, although ISO and JIS define two-dimensional sphericity by means of two or three roundness measurements from minimum circumscribing centre. One of the reasons is the difficulties of measuring technique for the whole spherical surface. In this article, the data to be referred is simulated by applying surface harmonics (Laplace's spherical function). Downhill simplex method, one of nonlinear optimization techniques, is applied for search of minimum circumscribing and maximum inscribing centres. Then, their application conditions are investigated. Furthermore, two- and three-dimensional values of the spherical form errors are compared. In the future, further evaluation methods should be studied for actual three-dimensionally measured spherical form errors.","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"1 1","pages":"253-258"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84562549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The parts feeder of a bowl type which has been widely utilized in the automatic assembly line of the factory is constituted by the bowl, the spring and driving mechanism. The usual feeder has the inclined leaf springs to give the bowl the vibration with the components of vertical and rotary directions. By using such a vibration. the parts can be conveyed along the passage provided on the bowl. In the new feeder stated in this paper, the FRR (fiber reinforced rubber) cylinder is used instead of the leaf springs. Because of the anisotropic elasticity of the FRB material, the bowl of the feeder vibrates in the same manner as that of the feeder with the leaf springs, and also has the parts feeding ability. Here, the experimental results obtaind in the new feeder of the howl type are described and the vibration of the feeder by the electromagnetic drive and conveying velocity are analyzed theoretically.
{"title":"New vibration hopper feeder using cylindrical UDCRR spring","authors":"J. Sawamura, Takemitsu Aya, Tomio Kotaki","doi":"10.2493/JJSPE.61.70","DOIUrl":"https://doi.org/10.2493/JJSPE.61.70","url":null,"abstract":"The parts feeder of a bowl type which has been widely utilized in the automatic assembly line of the factory is constituted by the bowl, the spring and driving mechanism. The usual feeder has the inclined leaf springs to give the bowl the vibration with the components of vertical and rotary directions. By using such a vibration. the parts can be conveyed along the passage provided on the bowl. In the new feeder stated in this paper, the FRR (fiber reinforced rubber) cylinder is used instead of the leaf springs. Because of the anisotropic elasticity of the FRB material, the bowl of the feeder vibrates in the same manner as that of the feeder with the leaf springs, and also has the parts feeding ability. Here, the experimental results obtaind in the new feeder of the howl type are described and the vibration of the feeder by the electromagnetic drive and conveying velocity are analyzed theoretically.","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"29 1","pages":"168-169"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74685283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This Study analyzes the damping characteristics due to the squeezing effect of air-lubricated sljdeways.A transfer function, Which is represented by an equation of motion of the slideway and shows the relatjonshjp between displacement Of the SlideWay and the outer force, has a formula of the first order in the numerator and a formula of the third-ordor in the denominator.The results are applied on a slideway of an ultra precision machine tool, of whjch the mass of its table ISI500kg and static stiffness is 0.795kN/μm.The third-order denominator of the transfer funcljon js numerically resolved to two factors, a first order delay system and a second order vibration system.As a result, the revese Laplace transformation of the transfer function of the slideway for the step input is obtained, It is known that the Vibration of the airlubricated slideway is almost treated as the second order vibration system by its frequency response and Step response.A damping ratio equivalent to 0, 08 has been determined to be the typical value of the darnpjng force due to the squeezing effect.
{"title":"Theoretical Analysis of Damping Characteristics of Air-lubricated Slideways","authors":"S. Kato","doi":"10.2493/JJSPE.61.959","DOIUrl":"https://doi.org/10.2493/JJSPE.61.959","url":null,"abstract":"This Study analyzes the damping characteristics due to the squeezing effect of air-lubricated sljdeways.A transfer function, Which is represented by an equation of motion of the slideway and shows the relatjonshjp between displacement Of the SlideWay and the outer force, has a formula of the first order in the numerator and a formula of the third-ordor in the denominator.The results are applied on a slideway of an ultra precision machine tool, of whjch the mass of its table ISI500kg and static stiffness is 0.795kN/μm.The third-order denominator of the transfer funcljon js numerically resolved to two factors, a first order delay system and a second order vibration system.As a result, the revese Laplace transformation of the transfer function of the slideway for the step input is obtained, It is known that the Vibration of the airlubricated slideway is almost treated as the second order vibration system by its frequency response and Step response.A damping ratio equivalent to 0, 08 has been determined to be the typical value of the darnpjng force due to the squeezing effect.","PeriodicalId":14336,"journal":{"name":"International Journal of The Japan Society for Precision Engineering","volume":"193 1","pages":"77-82"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88556480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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