Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)最新文献

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Intelligent design architecture for process control of deep-drawing 拉深过程控制的智能化设计体系
K. Manabe, H. Koyama, K. Katoh, S. Yoshihara
{"title":"Intelligent design architecture for process control of deep-drawing","authors":"K. Manabe, H. Koyama, K. Katoh, S. Yoshihara","doi":"10.1109/IPMM.1999.792541","DOIUrl":"https://doi.org/10.1109/IPMM.1999.792541","url":null,"abstract":"A concept of design architecture with a database for an intelligent sheet metal forming system was proposed to enable designing of a process control system without experts who are skilled and experienced in the forming process. In this study, the proposed architecture was applied to the variable blank holding force control technique for circular-cup deep-drawing. The system is available for three objective functions which are typical process requirements, cup wall uniformity, cup height improvement and energy saving. The availability of this design architecture is confirmed by experiments on aluminum alloy sheets.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115846513","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}
引用次数: 11
Material properties under drawing and extrusion with cyclic torsion 材料在拉伸和挤压循环扭转作用下的性能
L. Kong, P. Hodgson, L. Lin, B. Wang
{"title":"Material properties under drawing and extrusion with cyclic torsion","authors":"L. Kong, P. Hodgson, L. Lin, B. Wang","doi":"10.1109/IPMM.1999.791511","DOIUrl":"https://doi.org/10.1109/IPMM.1999.791511","url":null,"abstract":"Many cold and hot worked metals undergo strain softening and hardening when subjected to cyclic plastic deformation. The degree of strain softening depends on the amount of prior cold work or heat treatment and upon the strain magnitude and cycles applied. In this work, a lead bar was extruded and a copper bar was drawn through a cyclically twisting die in a specifically designed experimental rig. The drawing/extrusion load fluctuated at the same frequency as that of die twisting. The maximum load was equivalent to monotonic deformation when the die was changing direction. The degree of the reduction in load for both the drawing and extrusion depends on the deformation conditions and requires optimisation for the process.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121362330","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}
引用次数: 27
Using image information and partial least squares method to estimate mineral concentrations in mineral flotation 利用图像信息和偏最小二乘法估计矿物浮选中的矿物浓度
J. Hatonen, H. Hyotyniemi, J. Miettunen, L. Carlsson
{"title":"Using image information and partial least squares method to estimate mineral concentrations in mineral flotation","authors":"J. Hatonen, H. Hyotyniemi, J. Miettunen, L. Carlsson","doi":"10.1109/IPMM.1999.792523","DOIUrl":"https://doi.org/10.1109/IPMM.1999.792523","url":null,"abstract":"The possibility of predicting mineral concentrations in the flotation froth by the use of realtime acquired image data and the partial least squares (PLS) regression method is investigated. This is a straightforward application of utilising image analysis in the control and monitoring of the mineral flotation process. For several reasons this approach should also have potential as an industrial application: the price of the measurement unit is relatively inexpensive, and it will quickly supply grade estimates and also important image parameters such as speed, stability, and size of the froth bubbles. However, it will probably not have the long time accuracy of the conventional on-stream analysers. To test the methodology in practise, a reasonable amount of image data was collected together with froth samples from one of the flotation cells at the Pyhasalmi mine zinc circuit in Finland. The collected images were processed off-line to extract selected features from the images, and then the PLS method was used to construct a model to predict the zinc concentration in the froth as a function of the extracted image features.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129708835","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}
引用次数: 18
High temperature flow stress model and hot deformation behaviors of high Mo austenitic stainless steel 高钼奥氏体不锈钢高温流变应力模型及热变形行为
Xu Yourong, Chen Liangshen, J. Lei, Wang Deying
{"title":"High temperature flow stress model and hot deformation behaviors of high Mo austenitic stainless steel","authors":"Xu Yourong, Chen Liangshen, J. Lei, Wang Deying","doi":"10.1109/IPMM.1999.791490","DOIUrl":"https://doi.org/10.1109/IPMM.1999.791490","url":null,"abstract":"Single stage and double stage interrupted hot compression tests on the Thermecmastor-Z simulator for physical simulating hot rolling have been carried out for a 00Cr20Ni18Mo6Cu[N] austenitic stainless steel under the high temperature range from 1223 to 1373 K and various strain rates. The dynamic and static mechanical behavior and microstructure evolution of the steel were studied. The deformation activation energies of dynamic, static and metadynamic recrystallization were calculated. A serials of perfect flow stress models considering dynamic recrystallization were established. The predicted results agree well with the experiment data. Kinetic modeling of metadynamic and static recrystallization has also been determined.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127012834","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}
引用次数: 0
Acoustic emissions monitoring of SAG mill performance SAG磨机性能声发射监测
S. Spencer, J.J. Campbell, K. R. Weller, Y. Liu
{"title":"Acoustic emissions monitoring of SAG mill performance","authors":"S. Spencer, J.J. Campbell, K. R. Weller, Y. Liu","doi":"10.1109/IPMM.1999.791509","DOIUrl":"https://doi.org/10.1109/IPMM.1999.791509","url":null,"abstract":"Particle grinding is a final stage in the comminution process used to liberate minerals from gangue in mineral processing plants. Semi-autogenous grinding (SAG) occurs in tumbling mills which use both large ore particles and steel balls for grinding. Grinding is the most energy intensive mineral processing unit operation and hence its optimisation is of considerable interest to industry. Surface vibration (acoustic emissions) monitoring is a noninvasive low-cost means of monitoring normally inaccessible attributes of processes or equipment operation. The current investigation monitors vibrations in a SAG mill by an accelerometer attached to the outside of the rotating shell. Vibrations are interpreted in terms of the internal state of the SAG mill for a conditional experimental program over a wide range of operating conditions. Results support the view that higher feed rate dynamic steady states correspond to an increased charge mass, with enhanced cushioning of grinding media impacts on the liner due to an increase in the intervening charge volume. An increase in rotation speed results in grinding media being lifted higher and more often directly impacting on the liner, increasing acoustic emissions. Increased pulp density aids in damping collisions that generate acoustic emissions by increasing resistance to transport of media through the charge. Addition of grinding balls results in more high energy impact events between balls and liner. The relationships derived show promise for process control and condition monitoring.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125981770","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}
引用次数: 31
Preprocessing of industrial process data with outlier detection and correction 异常值检测与校正的工业过程数据预处理
J. Tenner, D. Linkens, T. J. Bailey
{"title":"Preprocessing of industrial process data with outlier detection and correction","authors":"J. Tenner, D. Linkens, T. J. Bailey","doi":"10.1109/IPMM.1999.791506","DOIUrl":"https://doi.org/10.1109/IPMM.1999.791506","url":null,"abstract":"When constructing predictive models from process data using techniques such as neural networks, the validity of the data is very important. This paper presents some current methods of 'cleaning' data and proposes a structured method applied to a batch heat treatment application in the steel industry. The methodology highlights the use of expert knowledge throughout a project's evolution. The application of this data cleaning methodology to the heat treatment process is described, and a quantitative comparison is made of the performance of a neural network model by comparing the accuracy of its predictions before and after the correction of outlying points.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122300765","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}
引用次数: 4
Atomic environments in relation to compound prediction 与化合物预测有关的原子环境
J. Daams, P. Villars
{"title":"Atomic environments in relation to compound prediction","authors":"J. Daams, P. Villars","doi":"10.1109/IPMM.1999.791564","DOIUrl":"https://doi.org/10.1109/IPMM.1999.791564","url":null,"abstract":"Predicting new materials and their respective physical properties is the most challenging objective for every scientist working in materials science. The main objective of this study was to collect together as many as possible of the rules or regularities by analyzing all the available published structural data. We analyze the crystal structure of all intermetallic structure prototypes for their geometrical correctness and, by doing so, we also determine for each atom in the asymmetrical unit - the atomic environment. After completion of this analysis, we are able to define a limited number of \"most-frequently-occurring\" atomic environment types (AETs). It was then relatively easy to combine crystal structure data and AETs into coordination prototypes which resulted in a large decrease in the number of structure prototypes. We introduce how the AET analysis is done and present some results for the intermetallic compounds. We present some quantum structure diagrams which were used to predict new materials.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124571241","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}
引用次数: 24
A genetic algorithm based approach to solve process plan selection problems 一种基于遗传算法的工艺方案选择方法
M. K. Tiwari, S. K. Tiwari, D. Roy, N. Vidyarthi, S. Kameshwaran
{"title":"A genetic algorithm based approach to solve process plan selection problems","authors":"M. K. Tiwari, S. K. Tiwari, D. Roy, N. Vidyarthi, S. Kameshwaran","doi":"10.1109/IPMM.1999.792490","DOIUrl":"https://doi.org/10.1109/IPMM.1999.792490","url":null,"abstract":"Selection of a process plan is a crucial decision making problem in manufacturing systems due to the presence of alternative plans arising from the availability of several machines, tools, fixtures, etc. Because of its impact on the performance of a manufacturing system, several researchers have addressed the plan selection problem in recent years. Selecting an optimal set of plans for a given set of parts becomes an NP complete problem under multiobjective and fairly restrictive conditions. In this paper, a genetic algorithm (GA) is used to obtain a set of feasible plans, for given part types and production volume, to minimize the processing time, setup time and materials handling time constrained by not overloading the machines. Obtaining near optimal solutions by using different weights for different objectives in GA, is also studied.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131619080","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}
引用次数: 5
Trends in intelligent process control methods in the primary aluminum industry 原铝工业智能过程控制方法的发展趋势
R. Bui, L.G. Tikasz, J. Perron
{"title":"Trends in intelligent process control methods in the primary aluminum industry","authors":"R. Bui, L.G. Tikasz, J. Perron","doi":"10.1109/IPMM.1999.791481","DOIUrl":"https://doi.org/10.1109/IPMM.1999.791481","url":null,"abstract":"This progress report presents new trends and work underway in research related to process control methods for the primary aluminum industry, based on process modeling combined with advanced control techniques using computational intelligence. Promising applications are seen for a wide range of process control situations from calcining kilns to electrolytic cells and casting furnaces.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116386145","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}
引用次数: 2
Discrete modeling via function approximation methods - towards bridging atomic - and micro-scales 离散建模通过函数逼近方法-桥接原子和微观尺度
A. G. Jackson, M. Benedict
{"title":"Discrete modeling via function approximation methods - towards bridging atomic - and micro-scales","authors":"A. G. Jackson, M. Benedict","doi":"10.1109/IPMM.1999.791547","DOIUrl":"https://doi.org/10.1109/IPMM.1999.791547","url":null,"abstract":"Discrete modeling of processes at the atomic-scale affords practical approaches to complex materials of interest commercially and to the US Air Force. Reductions in computation times can be large, suggesting the possibility of real-time modeling of thin film growth and the consequent development of processing routes to achieve specific physical and chemical properties. Formulation of the model to be used is critical in achieving such computational gains. Frameworks for these models such as Monte Carlo and molecular dynamics can be used conceptually, but they cannot be applied in practice because of the high number of required computations per time step. The simplest discrete model involves the Potts model to simulate energies, then to create a partition function of probabilities for various states and configurations, followed by a decision algorithm that determines the state of surface atoms. Although the inclusion of defects, dopants, atom complexes, surface reconstruction and crystal orientations can be included directly in this modeling approach, the resulting collection of behaviors is very entangled with logical and mathematical functions. Hence, the time to exercise the model increases noticeably. It is shown that this problem can be reduced dramatically by employing neuro-computing methods.","PeriodicalId":194215,"journal":{"name":"Proceedings of the Second International Conference on Intelligent Processing and Manufacturing of Materials. IPMM'99 (Cat. No.99EX296)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117066649","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}
引用次数: 0
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