Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643492
Li Hua, L. Wei, Zhao Rong
The problems of dropping ingot and locking ingot that there are when the aluminum ingot flip Device is working were analyzed. The kinematical analysis and dynamic analysis on aluminum ingot clamping process were carried out. The relationship between the working reliability of flip device and the aluminum ingot pose before the aluminum ingot accessing flip device was obtained. The constraint conditions of aluminum ingot accessing flip device were given. This paper provided key technical parameters to the research and development of aluminum ingot pose self-tuning device.
{"title":"Aluminum ingot clamping process dynamics modeling and analysis based on the aluminum ingot flip Device","authors":"Li Hua, L. Wei, Zhao Rong","doi":"10.1109/ISAM.2013.6643492","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643492","url":null,"abstract":"The problems of dropping ingot and locking ingot that there are when the aluminum ingot flip Device is working were analyzed. The kinematical analysis and dynamic analysis on aluminum ingot clamping process were carried out. The relationship between the working reliability of flip device and the aluminum ingot pose before the aluminum ingot accessing flip device was obtained. The constraint conditions of aluminum ingot accessing flip device were given. This paper provided key technical parameters to the research and development of aluminum ingot pose self-tuning device.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116242491","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643469
Renqiang Liu, Ge Q. Jeffrey, F. Gao, Liu Pin-kuan, Yue Yi
An optical fiber flexure hinge (OFFH) is presented which incorporate sensor with elastic kinematic pair, they are built into a parallel mechanism for in situ 6-DOF micro displacement and orientation measurement. The operation principle is based on bending measurement of flexure hinge itself by curvature optical fiber sensor. The OFFH curvature measurement model is analyzed. The calibration model and method is designed and a 6-DOF micro position and orientation measurement experiment system has been set up. This new sensor is compact, with wide measurement range and small measurement force, which is suitable for multi-dimensional micro operating system in situ micro position and orientation close loop control.
{"title":"A new parallel mechanism for 6-DOF micro displacement and orientation measurement based on optical fiber flexure hinges","authors":"Renqiang Liu, Ge Q. Jeffrey, F. Gao, Liu Pin-kuan, Yue Yi","doi":"10.1109/ISAM.2013.6643469","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643469","url":null,"abstract":"An optical fiber flexure hinge (OFFH) is presented which incorporate sensor with elastic kinematic pair, they are built into a parallel mechanism for in situ 6-DOF micro displacement and orientation measurement. The operation principle is based on bending measurement of flexure hinge itself by curvature optical fiber sensor. The OFFH curvature measurement model is analyzed. The calibration model and method is designed and a 6-DOF micro position and orientation measurement experiment system has been set up. This new sensor is compact, with wide measurement range and small measurement force, which is suitable for multi-dimensional micro operating system in situ micro position and orientation close loop control.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125285053","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643517
Yi Luo, Xiao-dong Wang, Peng Chen, W. Yang, Liang Chen
The importance of fixturing is often underestimated in the development of precision assembly system for miniature products. A 5-part component of a micro accelerometer is selected as an example in this paper. The sensitive structure that influences the performance of accelerometer most is the flexible beam on one part. A fixture with flexible fastening mechanism was proposed for assembly these miniature parts. The key mechanism is a flexible part, which is with two contacted points and metal flexible linkages. The thermal stress of the component after curing was studied using finite element model (FEM). The simulation results revealed that the height difference was the main cause to the stress on the flexible beam. The assembly sequence and strategy were optimized. The maximum stress was reduced to 72% of the original one while the height difference reached 15 μm. This study implies that an optimized fixture design and assembly sequence can also reduce the assembly stress remarkably.
{"title":"Fixture design and sequence analysis for low stress assembly of precision miniature devices without disturbance","authors":"Yi Luo, Xiao-dong Wang, Peng Chen, W. Yang, Liang Chen","doi":"10.1109/ISAM.2013.6643517","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643517","url":null,"abstract":"The importance of fixturing is often underestimated in the development of precision assembly system for miniature products. A 5-part component of a micro accelerometer is selected as an example in this paper. The sensitive structure that influences the performance of accelerometer most is the flexible beam on one part. A fixture with flexible fastening mechanism was proposed for assembly these miniature parts. The key mechanism is a flexible part, which is with two contacted points and metal flexible linkages. The thermal stress of the component after curing was studied using finite element model (FEM). The simulation results revealed that the height difference was the main cause to the stress on the flexible beam. The assembly sequence and strategy were optimized. The maximum stress was reduced to 72% of the original one while the height difference reached 15 μm. This study implies that an optimized fixture design and assembly sequence can also reduce the assembly stress remarkably.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122029875","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643459
Ying Zhang, Dinghua Zhang, Baohai Wu, Jianhua Yang
Thin-walled parts are widely used in aerospace, ships and automotive fields. However, due to the characteristics of multi-process and multi-procedure manufacturing technology, the production efficiency and machining precision of those parts are greatly limited. In this paper, a unified geometric modeling method for precision machining of thin-walled parts is presented. The unified model is established to represent the polymorphism of process surface for every stage in the whole machining process. Then with four variables, including design surface model, process surface model, offset transform and localization transform as well as the interactions among them, different application problems are described, which reveal the common mathematical essence. Firstly, for the process design of thin-walled parts, nonuniform allowance optimization design method is proposed based on the stable process stiffness. Secondly, for the rapid clamping and localization of thin-walled parts, a method of alignment localization with constraints and allowance optimization is presented for the near-shape blank. Thirdly, for the machining process controlling of thin-walled parts, a modeling and compensation method of elastic deformation error is developed in the multi-axis NC machining. Finally, several examples show that the geometric modeling method is feasible and the results can carry high precision and efficiency for thin-walled parts.
{"title":"A unified geometric modeling method of process surface for precision machining of thin-walled parts","authors":"Ying Zhang, Dinghua Zhang, Baohai Wu, Jianhua Yang","doi":"10.1109/ISAM.2013.6643459","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643459","url":null,"abstract":"Thin-walled parts are widely used in aerospace, ships and automotive fields. However, due to the characteristics of multi-process and multi-procedure manufacturing technology, the production efficiency and machining precision of those parts are greatly limited. In this paper, a unified geometric modeling method for precision machining of thin-walled parts is presented. The unified model is established to represent the polymorphism of process surface for every stage in the whole machining process. Then with four variables, including design surface model, process surface model, offset transform and localization transform as well as the interactions among them, different application problems are described, which reveal the common mathematical essence. Firstly, for the process design of thin-walled parts, nonuniform allowance optimization design method is proposed based on the stable process stiffness. Secondly, for the rapid clamping and localization of thin-walled parts, a method of alignment localization with constraints and allowance optimization is presented for the near-shape blank. Thirdly, for the machining process controlling of thin-walled parts, a modeling and compensation method of elastic deformation error is developed in the multi-axis NC machining. Finally, several examples show that the geometric modeling method is feasible and the results can carry high precision and efficiency for thin-walled parts.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114659504","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643470
A. Jammal, Y. Rong
Planetary gears are the most common and important part of wind turbine gearbox, that is why understanding their behavior becomes essential. This paper is a review on the literature covering the wind turbine gearbox, further investigating different approaches followed when modeling gearbox system. Systems having one degree of freedom as well as having six degrees are investigated. Furthermore, transmission errors and tooth wedging are introduced, in relation with assembly discrepancies, as they are common problem arising in gearbox systems nowadays. A critical analysis to some of the literature works is formulated, also, conclusive remarks highlighting important area to be focused on is proposed.
{"title":"Wind turbine gearbox dynamics","authors":"A. Jammal, Y. Rong","doi":"10.1109/ISAM.2013.6643470","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643470","url":null,"abstract":"Planetary gears are the most common and important part of wind turbine gearbox, that is why understanding their behavior becomes essential. This paper is a review on the literature covering the wind turbine gearbox, further investigating different approaches followed when modeling gearbox system. Systems having one degree of freedom as well as having six degrees are investigated. Furthermore, transmission errors and tooth wedging are introduced, in relation with assembly discrepancies, as they are common problem arising in gearbox systems nowadays. A critical analysis to some of the literature works is formulated, also, conclusive remarks highlighting important area to be focused on is proposed.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129775721","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643463
Fengtao Wang, Minqing Jing, Jun Yi, Heng Liu
In this paper, a general model is proposed to predict vibration responses of rotor system supported by cylindrical roller bearing under the effects of surface waviness. The contact force is obtained by using Hertzian line elastic contact deformation theory. The waviness of rolling elements is modelled by the cosine function. The cylindrical roller bearing model includes centrifugal forces. The governing equations of the system are got by the dynamic model. The implicit numerical integration technique Variable Step Runge-Kutta method with Newton-Raphson method is used to solve the system equations. Then the results are employed to investigate the effects of outer and inner race waviness on the vibration characteristics of the rotor system.
{"title":"Vibration analysis of a rotating system with cylindrical roller bearing surface waviness","authors":"Fengtao Wang, Minqing Jing, Jun Yi, Heng Liu","doi":"10.1109/ISAM.2013.6643463","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643463","url":null,"abstract":"In this paper, a general model is proposed to predict vibration responses of rotor system supported by cylindrical roller bearing under the effects of surface waviness. The contact force is obtained by using Hertzian line elastic contact deformation theory. The waviness of rolling elements is modelled by the cosine function. The cylindrical roller bearing model includes centrifugal forces. The governing equations of the system are got by the dynamic model. The implicit numerical integration technique Variable Step Runge-Kutta method with Newton-Raphson method is used to solve the system equations. Then the results are employed to investigate the effects of outer and inner race waviness on the vibration characteristics of the rotor system.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125589330","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643519
Jiang Huawei, Z. Tao, Liu Xiao, B. Shan, Rong Chen
A chemical reaction chamber was designed and manufactured to grow high quality, ultra-thin films using the atomic layer deposition (ALD) technology. As the distribution of temperature and gas pressure has large influences on the thickness of sub-nanometer films, it is crucial to achieve uniformity in terms of temperature and gas flow on the substrate. We report here the design and optimization of a cross-flow structured and radiation heated chamber, with special focus on the multi-inlet and multi-outlet structures to deliver the precursors and to get better distribution uniformity. Simulations based on finite element method (FEM) are employed to optimize the structure and corresponding experiments are made to validate with the simulation results.We find that by adjusting the inlet and outlet parameters, such as the inlet numbers and diameter, it is possible to achieve better uniformity of pressure on the substrate and a narrower film thickness distribution within the chamber. Factors influencing the gas flow over the wafer surface are reported and discussed.
{"title":"Optimization of inlets and outlets of an ALD chamber with radiant heating","authors":"Jiang Huawei, Z. Tao, Liu Xiao, B. Shan, Rong Chen","doi":"10.1109/ISAM.2013.6643519","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643519","url":null,"abstract":"A chemical reaction chamber was designed and manufactured to grow high quality, ultra-thin films using the atomic layer deposition (ALD) technology. As the distribution of temperature and gas pressure has large influences on the thickness of sub-nanometer films, it is crucial to achieve uniformity in terms of temperature and gas flow on the substrate. We report here the design and optimization of a cross-flow structured and radiation heated chamber, with special focus on the multi-inlet and multi-outlet structures to deliver the precursors and to get better distribution uniformity. Simulations based on finite element method (FEM) are employed to optimize the structure and corresponding experiments are made to validate with the simulation results.We find that by adjusting the inlet and outlet parameters, such as the inlet numbers and diameter, it is possible to achieve better uniformity of pressure on the substrate and a narrower film thickness distribution within the chamber. Factors influencing the gas flow over the wafer surface are reported and discussed.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126774993","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643501
M. Huhtala, M. Lohtander, J. Varis
Product Data Management (PDM) systems were created in the early of 1980s. The development has increased rapidly in these, and also in different CAD-systems. However, there still occur problems in linking these two systems together and getting the full benefit out from the PDM system. Modern PDM systems, together with CAD softwares, do not take into account the different design aspects when designing, for example, sheet metal products. CAD softwares give automatically some parameters for sheet metals but these parameters may not be correct ones. In almost every PDM system there is a possibility for giving almost real-time feedback between the designers and manufacturers, but this feature is rarely used. Only few system users actually know what kind of help the PDM is offering and what kind of add-ons can be added into the system. The main problem seems to be that there is not just one way to design a sheet metal product and transform it to the PDM, even if all the users were using the same PDM system with the same given introduction.
{"title":"Sheet metal design with the aid of Product Data Management (PDM) systems","authors":"M. Huhtala, M. Lohtander, J. Varis","doi":"10.1109/ISAM.2013.6643501","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643501","url":null,"abstract":"Product Data Management (PDM) systems were created in the early of 1980s. The development has increased rapidly in these, and also in different CAD-systems. However, there still occur problems in linking these two systems together and getting the full benefit out from the PDM system. Modern PDM systems, together with CAD softwares, do not take into account the different design aspects when designing, for example, sheet metal products. CAD softwares give automatically some parameters for sheet metals but these parameters may not be correct ones. In almost every PDM system there is a possibility for giving almost real-time feedback between the designers and manufacturers, but this feature is rarely used. Only few system users actually know what kind of help the PDM is offering and what kind of add-ons can be added into the system. The main problem seems to be that there is not just one way to design a sheet metal product and transform it to the PDM, even if all the users were using the same PDM system with the same given introduction.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133755434","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643518
G. Zhang, Rahman-Hebitul, Libo Zhao, Zhuangde Jiang, Longqi Xu, Jiuhong Wang, Zhigang Liu
The working principle and fabrication process of MEMS density sensor have been studied in this paper. And the density experiments were performed in acetone and silicon oil at temperatures in the range from 20.0 to 50.0 °C under atmospheric pressure. The maximum deviation and the average absolute deviation between the density experimental results and the reference values are -0.72% and 0.32%, respectively. Because of the small volume of MEMS density sensor, the required fluid volume for experiment is small and doesn't exceed 100 μL in general.
{"title":"MEMS fluid density sensor based on oscillating piezoresistive microcantilever","authors":"G. Zhang, Rahman-Hebitul, Libo Zhao, Zhuangde Jiang, Longqi Xu, Jiuhong Wang, Zhigang Liu","doi":"10.1109/ISAM.2013.6643518","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643518","url":null,"abstract":"The working principle and fabrication process of MEMS density sensor have been studied in this paper. And the density experiments were performed in acetone and silicon oil at temperatures in the range from 20.0 to 50.0 °C under atmospheric pressure. The maximum deviation and the average absolute deviation between the density experimental results and the reference values are -0.72% and 0.32%, respectively. Because of the small volume of MEMS density sensor, the required fluid volume for experiment is small and doesn't exceed 100 μL in general.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130967895","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}
Pub Date : 2013-10-24DOI: 10.1109/ISAM.2013.6643486
Xianming Gao, Jun Hong, Yanjing Yin, Yichao Zhen
In order to improve the R&D efficiency and promote economic benefits for companies, facing to various customer requirements, the overall scheme design of machine tools can be divided into process field and method field. In the process field, assembly skeleton modeling method was studied based on top-down design in which design datum, shape, geometric features, physical characteristics were considered for the whole design process. In the method field, similarity based retrieval mechanism and overall scheme layout were discussed for machine tool modular design. According to these studies, the overall scheme modular design software was developed, and the design efficiency was improved by using this software.
{"title":"Modular design of machine tools based on assembly skeleton model","authors":"Xianming Gao, Jun Hong, Yanjing Yin, Yichao Zhen","doi":"10.1109/ISAM.2013.6643486","DOIUrl":"https://doi.org/10.1109/ISAM.2013.6643486","url":null,"abstract":"In order to improve the R&D efficiency and promote economic benefits for companies, facing to various customer requirements, the overall scheme design of machine tools can be divided into process field and method field. In the process field, assembly skeleton modeling method was studied based on top-down design in which design datum, shape, geometric features, physical characteristics were considered for the whole design process. In the method field, similarity based retrieval mechanism and overall scheme layout were discussed for machine tool modular design. According to these studies, the overall scheme modular design software was developed, and the design efficiency was improved by using this software.","PeriodicalId":323666,"journal":{"name":"2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127768599","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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