Relevant bibliographies by topics / Closed-loop machining

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Closed-loop machining'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Closed-loop machining"

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Katz, Reuven, Vijay Srivatsan, and Lalit Patil. "Closed-loop machining cell for turbine blades." International Journal of Advanced Manufacturing Technology 55, no. 9-12 (February 26, 2011): 869–81. http://dx.doi.org/10.1007/s00170-010-3138-9.

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Wosnik, M., H. Rüdele, and P. Klemm. "Process-informed machining objects for closed-loop process planning." International Journal of Computer Integrated Manufacturing 22, no. 11 (November 2009): 1054–64. http://dx.doi.org/10.1080/09511920902741109.

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Zhou, Xin. "The Study of Closed-Loop Position Control System Based on CNC Processing." Advanced Materials Research 941-944 (June 2014): 2243–46. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.2243.

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In view of the existing problems of indirect position closed-loop control, a digitized closed-loop control method is presented and a new kind of position control system with fully digitized closed-loop based on that method is developed. In this way, the fully digitized control of cutter trajectory is implemented with the features of digitized driving, digitized measuring and digitized position control, so that the machining accuracy of the NC machine tools is effectively assured. This system has been used on varieties of NC machine tools and very good results have been obtained in the machining of complex precision parts.
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Lu, Jun, Yu Mei Huang, Yang Liu, Wen Wen Li, and Hua Zhong. "Research on Workpiece Machining Precision PID Control Model in Closed-Loop Manufacturing Systems." Applied Mechanics and Materials 16-19 (October 2009): 1174–78. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.1174.

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In this article, a new concept named ‘Closed-loop Manufacturing System’ (CLMS) is introduced. The Workpiece Machining Precision PID Control Model (WMPPCM) is proposed and described. PID error compensation model expressions are structured. The experimental method of WMPPCM is established. In the experiment, WMPPCM could be utilized to estimate the trend of machining error so as to conduct the adjustment before production. The experiment has verified the feasibility and validity of WMPPCM. The experiments have also proved that WMPPCM can decrease machining error more effectively then traditional CNC machining method.
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Sheng, Jun, Jian Gang Li, and Lei Zhou. "Closed-Loop Identification and Composed Controller Design for Precise Machining." Advanced Materials Research 97-101 (March 2010): 3139–45. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3139.

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For a class of three-loop architecture motion control system, two-stage close-loop identification is introduced to estimate the control plant and thus to tune the velocity controller. Based on the estimated model, PID position controller with derivative filter is proposed using pole-zero cancellation and pole assignment. Feed-forward compensators such as Velocity and Acceleration Feed-forward Controller (VAFC), Zero Phase Error Tracking Controller (ZPETC), Zero Magnitude Error Tracking controller (ZMETC) are introduced as well, and their effects are compared.
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Hanson, Reed D., and Tsu-Chin Tsao. "Periodic Sampling Interval Repetitive Control and Its Application to Variable Spindle Speed Noncircular Turning Process." Journal of Dynamic Systems, Measurement, and Control 122, no. 3 (June 1, 1998): 560–66. http://dx.doi.org/10.1115/1.1285857.

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This paper addresses discrete-time, repetitive control for linear, periodic, time-varying systems. A periodic, repetitive control design method based on gain scheduling is proposed and the necessary and sufficient condition for closed-loop stability is presented. Utilizing the special structure of the repetitive controller, an efficient method for evaluating the closed-loop stability is developed. The algorithm is applied to the control of a piezoelectric fast-tool stage for variable spindle speed noncircular turning process. The tool performs dynamic variable depth of cut machining to generate noncircular workpiece profiles while the spindle carrying the workpiece rotates at a variable speed to inhibit machining instability (chatter). Experimental machining results are presented that demostrate the tracking performance of the period, time-varying controller design proposed, as well as the ability to increase machining stability using this approach. [S0022-0434(00)02402-3]
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Alter, D. M., and Tsu-Chin Tsao. "Control of Linear Motors for Machine Tool Feed Drives: Design and Implementation of H∞ Optimal Feedback Control." Journal of Dynamic Systems, Measurement, and Control 118, no. 4 (December 1, 1996): 649–56. http://dx.doi.org/10.1115/1.2802339.

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Direct drive linear motors have good potential for use as next generation machine tool feed drives since they can increase machining rates and improve servo accuracy by eliminating gear related mechanical problems. To exploit the high speed and high response direct drives for machining, the servo control must achieve as high as possible tracking performance while at the same time establishing as much as possible the dynamic stiffness in order to maintain machining stability and reduce the effect of machining disturbance forces on the tool position. This paper investigates the use of optimal H∞ control to design for large stiffness and closed-loop tracking performance. Position feedback alone is first considered, with cutting force feedback later added to augment closed loop stiffness. Optimal position feedback is experimentally seen to achieve up to a 46 percent stiffness improvement over that achievable with proportional-derivative control. The addition of force feedback to the servo-loop resulted in a further 70 to 100 percent stiffness improvement over the position feedback alone values.
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Wang, Yu Kui, Bo Yan Song, and Wan Sheng Zhao. "Research on Highly Efficient EDM Pulse Power Supply and Its Experiments." Key Engineering Materials 291-292 (August 2005): 567–72. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.567.

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Their efficiency and their power factor of conventional independent electrical discharge machining (EDM) pulse power supplies with the current-limiting-resistor circuit is so low that they do not meet the need of advanced EDM technologies. The design of highly efficient EDM pulse power supply based on switching circuit pulse width modulation current closed-loop principle has been initiated. It is composed of such three stages as a single-phase active power factor correction preregulator, a full-bridge phase shift resonant converter based on machining current closed-loop control and a pulse generator based on machining sequence control. Therefore, the efficiency of the new system is considerably increased to about 70%, its weight and size is decreased much. Its power factor is a great deal increased to about 0.95. Experiment results have demonstrated that the highly efficient EDM pulse power supply is capable of low electrode wear, high speed, stable machining.
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Cheraghi, S. H. "A closed-loop process analysis and control system for machining parts." International Journal of Production Research 37, no. 6 (April 1999): 1353–68. http://dx.doi.org/10.1080/002075499191292.

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Tong, Zhen, Wenbin Zhong, Wenhan Zeng, and Xiangqian Jiang. "Closed-loop form error measurement and compensation for FTS freeform machining." CIRP Annals 70, no. 1 (2021): 455–58. http://dx.doi.org/10.1016/j.cirp.2021.04.072.

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Dissertations / Theses on the topic "Closed-loop machining"

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Laspas, Theodoros. "Closed Force Loop Evaluation of Machining Systems." Licentiate thesis, KTH, Maskin- och processteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-227664.

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Machine tools accuracy has been a cornerstone in defining machining system capability and directly affecting dimensional and geometrical tolerance of machined parts. The effort for achieving higher precision and accuracy can be distinguished in two general ideas. One is to improve performance of machine tools by designing better, stiffer and more accurate machine tools. The other is to develop tools and methods for evaluating and measuring their behaviour and gain knowledge of their performance. In order to properly control the machine tool characteristics that can affect and improve their accuracy such as static stiffness and static accuracy.This thesis is aiming at establishing and further advancing the idea of loaded testing of machining systems and the concept of Elastically Linked Systems as a framework for measuring, identifying and characterising quasi-static stiffness of machine tools under loaded conditions. This will allow the creation of an improved capability profile of machining system accuracy. The focus is on the implementation of Elastically Linked Systems concept (ELS) through the Loaded Double Bar system, a measurement method that can partly simulate the process-machine interaction by reproducing forces exerted on the machine tool structure for the evaluation of system characteristics under loaded condition. This allows the qualitative and quantitative evaluation and comparison of machine tools for the purpose of accuracy enhancement, identification of weak directions with potential utilization in process planning, machine procurement and maintenance.Through two case studies, the capability to identify the effect of machine components and structure behaviour is shown.

QC 20180514

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Srinivas, Sundarram Sriharsha. "Development of Electrochemical Micro Machining." Texas A&M University, 2008. http://hdl.handle.net/1969.1/86045.

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The machining of materials on micrometer and sub-micrometer scale is considered the technology of the future. The current techniques for micro manufacturing mostly are silicon based. These manufacturing techniques are not suitable for use in demanding applications like aerospace and biomedical industries. Micro electrochemical machining (μECM) removes material while holding micron tolerances and μECM can machine hard metals and alloys. This study aims at developing a novel μECM utilizing high frequency voltage pulses and closed loop control. Stainless steel SS-316L and copper alloy CA-173 were chosen as the workpiece materials. A model was developed for material removal rate. The research studied the effect of various parameters such as voltage, frequency, pulse ON/OFF time, and delay between pulses of the stepper motor on the machined profiles. Experimental data on small drilled holes agreed with theoretical models within 10%. Micro burrs can be effectively removed by optimal μECM. A sacrificial layer helped to improve the hole profile since it reduced 43% of corner rounding.
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Carlson, Shane A. "Development of a Variational Part Model Using In-Process Dimensional Measurement Error." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1341.pdf.

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Danjou, Christophe. "Ingénierie de la chaîne numérique d'industrialisation : proposition d'un modèle d'interopérabilité pour la conception-fabrication intégrées." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2234/document.

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Ce travail s'intéresse à la gestion d'information techniques et connaissances métiers issues de la production pour assurer l'interopérabilité et la continuité de la chaîne numérique. Dans un contexte d'entreprise étendue et de développement des technologies de l’information pour l'usine du futur, l'industrie aéronautique s'oriente vers une intégration flexible et agile des phases de conception et fabrication pour l'obtention de pièces bonnes du premier coup. C'est pour assurer la maîtrise des processus et la capitalisation des savoir-faire métier issus de la fabrication que ces travaux adressent la problématique suivante : comment élaborer un modèle d'interopérabilité de la chaîne numérique d'industrialisation, pour assurer une intégration agile de la conception et de la fabrication ? Pour ce faire, nous définissons deux propositions : OntoSTEP-NC pour permettre l'extraction et la structuration des données issues de la fabrication et Closed-Loop Manufacturing pour permettre l'intégration et la réutilisation des connaissances métiers capitalisées au niveau de l'industrialisation. Les apports de ces propositions se retrouvent dans la définition d'un cadre d'interopérabilité pour l'usine du futur mais également dans les enjeux tels que la définition de bonnes pratiques pour l'entreprise étendue en vue d'une harmonisation des processus de fabrication. Ces travaux ont été validés au travers d'un démonstrateur sur un cas d'étude industriel comportant plusieurs scénarii
This work focuses on the knowledge and the data management extracted from the manufacturing to ensure the interoperability in the digital chain. According to the extended enterprise and the factory of the future context, the aeronautics manufacturers tend to a design and manufacturing integrated platform in order to get a right part the first time.This work focus on manufacturing process control and capitalization of know-how from the manufacturing aiming at answering the following issue : How to enable interoperability for the digital production process in order to ensure an integrated and agile design and manufacturing ? This issue is addressed with two proposals : OntoSTEP-NC which focuses on how to model and structure the manufacturing knowledge from the CNC machine and Closed-Loop Manufacturing which focuses on how to re-use and integrate the information feedback from manufacturing to process engineering. Both combined those two proposals address the main issue of this work defining an interoperability framework for the factory of the future and address trends like the definition of guidelines for manufacturing in extended enterprise context. This work has been validated through a demonstrator and an industrial case study with various scenarios
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Books on the topic "Closed-loop machining"

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1948-, Welsch Lawrence Arno, and National Institute of Standards and Technology (U.S.), eds. Understanding part fabrication errors in closed-loop machining systems. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2002.

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1948-, Welsch Lawrence Arno, and National Institute of Standards and Technology (U.S.), eds. Understanding part fabrication errors in closed-loop machining systems. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2002.

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1948-, Welsch Lawrence Arno, and National Institute of Standards and Technology (U.S.), eds. Understanding part fabrication errors in closed-loop machining systems. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2002.

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Book chapters on the topic "Closed-loop machining"

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Zhang, Fei Hu, X. W. Sun, Shen Dong, and L. J. Zhang. "Research on Ultra-Low Feed Servo Control Technology of Ultra-Precision Machine Based on Semi-Closed Loop Control." In Advances in Machining & Manufacturing Technology VIII, 486–90. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-999-7.486.

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Xu, Xun. "Integrating CAD/CAPP/CAM/CNC with Inspections." In Integrating Advanced Computer-Aided Design, Manufacturing, and Numerical Control, 297–310. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-714-0.ch014.

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A logical step after CNC machining is inspection. With inspections, Closed-Loop Machining (CLM) can be realized to maximize the efficiency of a machining process by maintaining a tight control in a manufacturing system. CLM is normally regarded as the highest level of CNC automation. CLM however, requires a tight integration between CAD, CAPP, CAM, and CNC, in particular CAM and CNC and inspections. The questions that are to be answered are (a) what type of inspections is fit for CLM and (b) is there a good data model that one can use to bring machining and inspections together? This chapter tries to provide some possible solutions to these questions. Prior to this, a brief review of the past research work is given. Toward the end of the chapter, a conceptual framework for integrating machining with inspections is presented.
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Conference papers on the topic "Closed-loop machining"

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Po, Hu, Fu Hongya, Han Zhenyu, and Han Dedong. "A closed-loop and self-learning STEP-NC machining system." In 2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2014. http://dx.doi.org/10.1109/aim.2014.6878312.

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Marie, S., and P. Maurine. "Elasto-geometrical modelling of closed-loop industrial robots used for machining applications." In 2008 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2008. http://dx.doi.org/10.1109/robot.2008.4543382.

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Ye, Huijuan, and Xiyong Zhang. "Design and Simulation of Closed Loop Control System for Large Precision Machining." In 2019 IEEE 4th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC). IEEE, 2019. http://dx.doi.org/10.1109/iaeac47372.2019.8998072.

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Penz, Andreas, Doris Leidinger, and Dieter Schuoecker. "Modeling of a closed-loop controlled laser machining process with different control strategies." In Europto High Power Lasers and Laser Applications V, edited by Eckhard Beyer, Maichi Cantello, Aldo V. La Rocca, Lucien D. Laude, Flemming O. Olsen, and Gerd Sepold. SPIE, 1994. http://dx.doi.org/10.1117/12.184734.

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Zheng, Yong, Donglin Peng, Ziran Chen, Tianheng Zhang, Xihou Chen, and Fangyan Zheng. "Research on full closed loop NC system of linear cutting machine for high accuracy internal gear machining." In Seventh International Symposium on Precision Engineering Measurements and Instrumentation, edited by Kuang-Chao Fan, Man Song, and Rong-Sheng Lu. SPIE, 2011. http://dx.doi.org/10.1117/12.904654.

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Xu, Chao, Pingfa Feng, Dingwen Yu, Zhijun Wu, and Jianfu Zhang. "Stability Prediction of Milling Process With Closed Machining System Dynamics With Flexible Thin-Walled Workpiece." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51454.

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Despite recent advances and improvements in modeling and prediction of the dynamics of the machining process, an efficient machining process is limited due to chatter and instability of machining system. In fact, the machining system contains various kinds of joints, which cause difficulties in dynamics modeling, simulation and prediction. Moreover, the flexible support system results in large deformation and violent vibration of the workpiece when machining, and the thin-walled workpiece easily gives rise to the chatter of the machining system. Therefore, the dynamics of the flexible support system was considered to calculate stability lobe diagram in the modeling of milling process. The whole machining system was regarded as a closed loop composed by the machine tool structures, support, workpiece and machining process. In this paper, the receptance coupling (RC) method was introduced to predict the dynamics of the closed machining system. A milling process was taken for example to predict the chatter limitations using the dynamics of closed model. The mathematical model of the machining system (machine tool structures, spindle, holder and tool), together with the details of joint contacts, was given based on the RC method. The RC model was used to obtain the dynamics of the system, while receptance of the tool point was coupled. Based on the coupling model of the machining system, the depth limitations under different speeds were estimated for the technology parameter optimization in milling process. The response was considered to be the sum of the cutting point and the support system. The flexibility of the support system was considered to be the feedback of the cutting stiffness. By this means, the traditional model was modified to calculate the stability lobe diagram based on the dynamics of the spindle and support system. Furthermore, the milling experiment was carried out to verify the prediction results, and the dominant natural frequencies of receptance at tool point were obtained by modal testing to define the stability lobe diagram. It was found that the chatter results matched well with the stability lobes. It was concluded that the support system with poor stiffness might cause violent chatter especially when the workpiece was thin-walled. The cutting depth limitations of the flexible support system were lower than that of the rigid one. Moreover, this closed model of the machining system is appropriate for the chatter prediction of the flexible support system or thin-walled workpiece, so it is helpful for a better parameter optimization.
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Landers, Robert G., and A. Galip Ulsoy. "Nonlinear Feed Effect in Machining Chatter Analysis." In ASME 2007 International Manufacturing Science and Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/msec2007-31045.

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Regenerative chatter is a major limitation to the productivity and quality of machining operations due to the excessive rate of tool wear and scrap parts which are produced. Machining chatter analysis techniques examine the stability of the closed-loop model (force process and machine tool-part structure) of the machining operation to determine the stable process parameter space. Almost all chatter analysis techniques assume a linear force process and develop stability lobe diagrams (i.e., plots of the stable and unstable regions in the process parameter space) for a specific feed. It is well known that machining force processes inherently contain a nonlinear relationship between the force and the feed, which is typically described by a power law. In this paper, the linear chatter analysis technique developed by Budak and Altintas is extended to account for the force-feed nonlinearity. The analysis provides insight into the effect feed has on chatter in machining operations. Also, by directly including the force-feed nonlinearity in the chatter analysis, the need to calibrate the force process model at different feeds is alleviated. The analysis is developed for turning and face milling operations and is validated via time domain simulations for both operations and by experiments for a face milling operation. The analyses show excellent agreement with both the time domain simulations and the experiments. Further, several end milling experiments were conducted that illustrate the nonlinear effect feed has on chatter in machining operations.
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Zhao, Yaoyao F., Xun W. Xu, and Sheng Q. Xie. "Reactive Process Planning: Incorporating Machining, Inspection, and Feedback." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84316.

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Closed-Loop Manufacturing (CLM) techniques include machine tool self-checks, automated setups, tool measurement, in-process probing with process adjustment, on-machine final inspection, data collection and data analysis. All of these elements and more are utilized to collect data in a mostly automated fashion to subsequently correct and adjust undesired conditions that can affect part quality. Inspection process planning plays an essential part of CLM. As G&M codes that contains low-level information or vendor-specific bespoke routines is the primary programming language, inspection process planning is mostly isolated from machining process planning. With the development of new data model standards such as STEP and STEP-NC providing high-level product information for the entire manufacturing chain, it is conceivable that both machining and inspection process planning are considered hand-in-hand to generate optimal machining and inspection sequences with real-time measurement feedback for the CLM scenario. This paper introduces an reactive process planning system architecture that incorporates machining, inspection, and feedback. In order to provide real-time inspection feedback, On-Machine Measurement (OMM) is chosen to carry out inspection operations. Implementation of the proposed architecture has been partially carried out with newly developed data model and interpreter. A case study testified the feasibility of the proposed architecture.
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Micali, Maxwell K., Hayley M. Cashdollar, Zachary T. Gima, and Mitchell T. Westwood. "One Touch Workpiece Verification System for CNC Machining Using a Low-Cost Computer Vision Approach." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8725.

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While CNC programmers have powerful tools to develop optimized toolpaths and machining plans, these efforts can be wholly undermined by something as simple as human operator error during fixturing. This project addresses that potential operator error with a computer vision approach to provide coarse, closed-loop control between fixturing and machining processes. Prior to starting the machining cycle, a sensor suite detects the geometry that is currently fixtured using computer vision algorithms and compare this geometry to a CAD reference. If the detected and reference geometries are not similar, the machining cycle will not start, and an alarm will be raised. The outcome of this project is the proof of concept of a low-cost, machine/controller agnostic solution that is applied to CNC milling machines. The Workpiece Verification System (WVS) prototype implemented in this work cost a total of $100 to build, and all of the processing is performed on the self-contained platform. This solution has additional applications beyond milling that the authors are exploring.
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DeWitte, Lisa N., Christopher J. Saldana, Thomas A. Feldhausen, and Thomas R. Kurfess. "Initial Process Planning of a Hybrid Multi-Tasking Platform." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8403.

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Abstract Applications of hybrid technology are expanding from refurbishment and repair to low quantity, specialty part production, which are staple characteristics in medical implant, energy, and aerospace industry sectors, among others. This expansion has led to the development of the Mazak VC-500A/5X AM HWD, a wire fed laser cladding unit equipped with a standard 5 axis CNC. This unit is capable of building near net geometry of complex medium to large parts within a profitable timeframe, due to its comparatively high rate of deposition to that of a powder fed hybrid system. In this study, deposition and machining capabilities of the VC-500A/5X AM HWD are assessed through the production of three different test geometries by different process plans. Production of these test geometries is supported by an open loop sensor package primarily for monitoring machine health, data collection, and machine operator aid. The viability of extended deposition followed by machining is evaluated against a more cyclical strategy of reoccurring deposition and machining operations. Lastly, common defects in as-built geometries are evaluated and addressed through revisions to original process plans and toolpaths, indicating the need for continued innovation in hybrid manufacturing specific CAM/CAD software, as well as closed loop machine monitoring and quality control.
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Reports on the topic "Closed-loop machining"

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Brandy, Herbert T., and Lawrence A. Welsch. Understanding part fabrication errors in closed-loop machining systems. Gaithersburg, MD: National Institute of Standards and Technology, 2002. http://dx.doi.org/10.6028/nist.ir.6876.

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