Log in

Relevant bibliographies by topics / Closed-loop machining / Journal articles

To see the other types of publications on this topic, follow the link: Closed-loop machining.

Journal articles on the topic 'Closed-loop machining'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Closed-loop machining.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

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.

Full text

Abstract:

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.

APA, Harvard, Vancouver, ISO, and other styles

4

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.

Full text

Abstract:

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.

APA, Harvard, Vancouver, ISO, and other styles

5

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.

Full text

Abstract:

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.

APA, Harvard, Vancouver, ISO, and other styles

6

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.

Full text

Abstract:

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]

APA, Harvard, Vancouver, ISO, and other styles

7

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.

Full text

Abstract:

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.

APA, Harvard, Vancouver, ISO, and other styles

8

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.

Full text

Abstract:

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.

APA, Harvard, Vancouver, ISO, and other styles

9

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Brecher, Christian, Dominik Lindemann, and Christian Wenzel. "Influences of Closed Loop Control Componentson the Performance of Ultra-Precision Machines." Key Engineering Materials 625 (August 2014): 207–12. http://dx.doi.org/10.4028/www.scientific.net/kem.625.207.

Full text

Abstract:

At Fraunhofer IPT a test bench has been setup to analyze closed loop control components and their interfaces with focus on their application in ultra-precision machining applications. This paper will present the results of the analysis of feedback and servo drive systems and will give a close inside on the influences of linear scales and analog and digital servo drives for applications in ultra-precision machining. The performed measurements include the analysis of the position accuracy and repeatability (step response test) as well as the determination of the dynamic frequency characteristics (stiffness / compliance) of an air bearing axis. With respect to the aforementioned measurements the tests have been performed under the variation of linear scales (vendor, pitch, signal, sampling frequency, etc.) and servo drives (vendor, switching or linear amplifiers, PWM frequency, control architecture, DC bus voltage, etc.). The paper will give a summary on the results of the analyzed topics, carefully chosen regarding their relevance to ultra-precision machining. Finally, a short outlook to future research work concerning the analysis of CNC controls will be given.

APA, Harvard, Vancouver, ISO, and other styles

12

Wang, Yu Kui, Bo Yan Song, Zhen Long Wang, and Wan Sheng Zhao. "Research on Energy-Saving EDM Pulse Power Supply." Key Engineering Materials 375-376 (March 2008): 714–18. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.714.

Full text

Abstract:

The performance and stability of output of electrical discharge machining (EDM) are determined by the output of EDM pulse power supply. In order to resolve disadvantages of conventional pulse power supply, such as undesirable efficiency and low power factor, the prototype design of energy-saving EDM pulse power supply is developed. It is composed of such three stages as a single-phase active power factor correction (PFC) pre-regulator, a full-bridge phase shift zero voltage switching (FB-PS-ZVS) converter based on complex control paralleled of machining current closed-loop and voltage closed-loop at period of spark gap insulation, and a pulse generator based on machining sequence control. The PFC pre-regulator contributes to a great increase to about 0.95 in its power factor. The efficiency of the new system is considerably increased to about 70% due to design of ZVS. The pulse generator contributes to the pulse machining current without a tail. Experiment results demonstrates that the prototype is capable of low electrode wear, high speed, stable machining.

APA, Harvard, Vancouver, ISO, and other styles

13

Liu, Rui Yi, and Jun Huang. "The Application of System Parameters in Eliminating Oscillation and Improving Machining Accuracy of CNC Machine Tool." Applied Mechanics and Materials 268-270 (December 2012): 1523–26. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.1523.

Full text

Abstract:

The measures of eliminating system oscillation by using parameters were put forward in semi-closed loop and closed loop control. The setup procedures of parameters were introduced, which included position loop gain, bi-position feedback, mechanical speed feedback. The setting of the parameters such as acceleration of backlash, compensation for static friction, feed forward and look-ahead feed forward of servo were also proposed, for purpose of improving the position accuracy and interpolation accuracy. The application of the system parameters is significant for improving the machining accuracy and ability of CNC machine tools.

APA, Harvard, Vancouver, ISO, and other styles

14

Lu, Zhi Xue, Lie En Guo, Ying Yan, and Juan Juan Li. "A Novel Method of Electrical Discharge Machining in Gas Gap State Control." Advanced Materials Research 430-432 (January 2012): 1886–89. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1886.

Full text

Abstract:

According to the characteristics of electrical discharge machining in gas, a reference voltage adjustment module was joined into the traditional reference voltage comparison gap state control system, to constitute a closed-loop gap state control system. The proposed gap state control method is expected to improve machining efficiency and machining accuracy of electrical discharge machining (EDM) in gas and improve the automaticity of electric discharge machine tool in gas. Meanwhile, it also has certain reference value for the traditional electrical discharge machining gap state control.

APA, Harvard, Vancouver, ISO, and other styles

15

Zhao, Fiona, Xun Xu, and Shane Xie. "STEP-NC enabled on-line inspection in support of closed-loop machining." Robotics and Computer-Integrated Manufacturing 24, no. 2 (April 2008): 200–216. http://dx.doi.org/10.1016/j.rcim.2006.10.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Sawada, Kiyoshi, Yoshimi Takeuchi, and Toshio Sata. "Development of Ultraprecision Machining Center with Closed-Loop Structure and Its Control." CIRP Annals 44, no. 1 (1995): 369–72. http://dx.doi.org/10.1016/s0007-8506(07)62344-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Liu, Changqing, Yingguang Li, and Weiming Shen. "Dynamic feature modelling for closed-loop machining process control of complex parts." International Journal of Computer Integrated Manufacturing 28, no. 7 (March 24, 2014): 753–65. http://dx.doi.org/10.1080/0951192x.2014.900870.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Sawada, Kiyoshi, Keisuke Imai, Yoshimi Takeuchi, and Toshio Sata. "Development of Ultraprecision Machining Center with Closed-Loop Structure and Its Control." Transactions of the Japan Society of Mechanical Engineers Series C 61, no. 585 (1995): 2121–27. http://dx.doi.org/10.1299/kikaic.61.2121.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Guolan, Tang, and Wu Yunzhong. "Reformation and Commissioning Research on Closed-Loop Control of Y Axis CNC Milling Machine." Open Mechanical Engineering Journal 9, no. 1 (September 16, 2015): 613–17. http://dx.doi.org/10.2174/1874155x01509010613.

Full text

Abstract:

Considering its working stability, semi-closed loop control is usually used in middle - grade CNC machine tool. But in the control，processing quality and machining precision are seriously affected by wear, hot variant, screw error and backlash of machine driven system. In order to improve them, reformation processing on closed-loop of Y axis in THWMZT-1B CNC milling machine is introduced, such as connecting and installing hardware, setting parameters and backlash compensating. After commissioning it is satisfying that repeated positioning accuracy can reach 0.001mm.

APA, Harvard, Vancouver, ISO, and other styles

20

Furness, R. J., A. Galip Ulsoy, and C. L. Wu. "Feed, Speed, and Torque Controllers for Drilling." Journal of Engineering for Industry 118, no. 1 (February 1, 1996): 2–9. http://dx.doi.org/10.1115/1.2803645.

Full text

Abstract:

The design and implementation of feed, speed, and torque controllers for drilling is discussed. Dynamic models of the feedrate drive and spindle motors were developed using experimental data and least squares estimation. These dynamic models were subsequently used to design closed loop feed and speed controllers, which allow for independent control of the machining feed and speed during drilling. They effectively track constant, as well as step-change, command references. Subsequently, the feed controller was used to develop a dynamic model between feed and torque, and then was cascaded with a torque control loop. The dynamic modeling and subsequent closed loop controller design and performance are described.

APA, Harvard, Vancouver, ISO, and other styles

21

Guo, Bo, Shi Bin Liu, Jin Tao Liang, Wen Guang Feng, Yu Xin Liu, and Ju Ping Li. "Study on Resonant Characteristics of Closed-Loop Controlled Microcantilever." Key Engineering Materials 483 (June 2011): 117–21. http://dx.doi.org/10.4028/www.scientific.net/kem.483.117.

Full text

Abstract:

A kind of double-layer Si-based microcantilever was fabricated using standard integrated circuit and micro-mechanical machining technology. It was thermally-excited and the signal was detected based on piezoresistance effect of semiconductors. Taking the advantage of FPGA, the digital closed-loop system on silicon resonant microcantilever was implemented. On this basis, the resonant characteristics like amplitude of output signal, the resonant frequency shift, the frequency stability and the quality factor of this kind of microcantilever were studied through theoretical analysis and experiment. This paper focus on the dependence of amplitude of output signal on the exciting power, bias voltage as well as the dependence of resonant frequency shift of output signal on the exciting voltage, bias voltage. Analysis about the result of the experiment was given, which showed that this silicon microcantilever is suitable for resonant microsensor, and provided some advices for the optimum design of the system. It laid the foundation for the development of a new resonant structure of silicon micro-cantilever sensors.

APA, Harvard, Vancouver, ISO, and other styles

22

Dinauer, W. R., N. A. Duffie, and M. L. Philpott. "Error Compensation Algorithms for Sculptured Surface Production." Journal of Engineering for Industry 116, no. 2 (May 1, 1994): 144–52. http://dx.doi.org/10.1115/1.2901924.

Full text

Abstract:

Four algorithms for removing shape and waviness errors in sculptured surface production processes are described in the paper. One of the algorithms employs an open-loop strategy without inspection, error analysis, and error compensation. The other three algorithms employ closed-loop inspection error analysis and error compensation strategies to manipulate control surfaces used in sculptured surface production. Coordinate measurements made on the surface being produced are compared with a designed surface and the results are used to modify related control surfaces that are used to guide processing equipment. Two of the closed-loop algorithms also use intermediate planned surfaces to improve error compensation and production control. Experiments are described in the paper in which the algorithms were tested on an experimental surface finishing system that included an optical probe, grinding spindle, and computer control system integrated with a CNC machining center. The results obtained using open-loop and closed-loop algorithms are compared, and it is shown that surface inspection, surface error analysis, surface compensation, and surface grinding can be iteratively applied to converge rough-machined test surfaces to their designed shape. The closed-loop algorithms are shown to be capable of compensating for disturbances in the finishing process that went undetected when the open-loop algorithm was used. The closed-loop algorithms have significant potential for application in automated finishing systems for molds and dies.

APA, Harvard, Vancouver, ISO, and other styles

23

Yang, Yang, Mo Rong, and Wan Neng. "The Research of Machining Process Design Based on Manufacturing Resources in MBD Mode." Advanced Materials Research 542-543 (June 2012): 523–27. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.523.

Full text

Abstract:

To strengthen the application efficiency of 3D machining procedure model and the contact of process design stage and process implementation stage, and to reduce complicated issues of process change, machining process design and change based on the manufacturing resource information in MBD mode is proposed. Integration framework of manufacturing resources field and 3D machining process design and change are analyzed, manufacturing resource feature model of 3D machining process model is described, monitoring the manufacturing resource and collecting static and dynamic data of manufacturing resources through RFID is put forward, change of 3D machining procedure model caused by manufacturing resource conflicts are discussed, a closed-loop system structure of packaging manufacturing resource information and machining process change is established.

APA, Harvard, Vancouver, ISO, and other styles

24

YAN, Rong. "Closed-loop Stiffness Modeling and Stiffness Index Analysis for Multi-axis Machining System." Journal of Mechanical Engineering 48, no. 01 (2012): 177. http://dx.doi.org/10.3901/jme.2012.01.177.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Alatorre, David, Amir Rabani, Dragos Axinte, and David T. Branson. "Closed loop force control of in-situ machining robots using audible sound features." Mechanical Systems and Signal Processing 136 (February 2020): 106517. http://dx.doi.org/10.1016/j.ymssp.2019.106517.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Lu, Jun, Yu Mei Huang, Wen Wen Li, Yang Liu, and Hua Zhong. "Study on Workpiece Machining Precision PID Control Model in Closed-Loop Manufacturing Systems." Key Engineering Materials 419-420 (October 2009): 469–72. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.469.

Full text

Abstract:

In this paper, a new concept named “Closed-loop Manufacturing System” (CLMS) is proposed. The Workpiece Machining Precision PID Control Model (WMPPCM) is outlined firstly, in which PID model expressions are structured and the role of proportion, integration, differential adjustment are analyzed. Then, the experimental method of WMPPCM is established to verify the feasibility and validity of this model. In the experiment, WMPPCM could be utilized to estimate the trend of processing error so as to conduct the adjustment before production. It is also proved that WMPPCM in CLMS has a significant effect on error compensation, which builds up the theoretical foundation for paper research on CLMS in terms of WMPPCM.

APA, Harvard, Vancouver, ISO, and other styles

27

Zhang, P., A. von Freyberg, and A. Fischer. "Closed-loop quality control system for laser chemical machining in metal micro-production." International Journal of Advanced Manufacturing Technology 93, no. 9-12 (July 25, 2017): 3693–703. http://dx.doi.org/10.1007/s00170-017-0436-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Feng, Bin, Xue Song Mei, Liang Guo, Dong Sheng Zhang, and You Long Cheng. "Backlash Compensation on CNC Machine Tool Based on Semi-Closed Loop Control." Advanced Materials Research 346 (September 2011): 644–49. http://dx.doi.org/10.4028/www.scientific.net/amr.346.644.

Full text

Abstract:

The positional accuracy and machining precision are mainly affected by backlash for semi-closed loop control CNC machine tool. And compensation for backlash is essential to improving the accuracy of machine tool. A method is developed to reduce contouring error in this paper. A simulated model of backlash and Open CNC system are used to verify compensation algorithm. Computational simulations and experimental results have shown that the contouring error due to backlash can be greatly reduced by using backlash compensation.

APA, Harvard, Vancouver, ISO, and other styles

29

LIU, EYSION A., SIMON HO, MITCHEL WEHRLY, and WILLIAM F. RESH. "FEA APPLICATIONS IN MILLING CHATTER STABILITY ANALYSIS." Journal of Advanced Manufacturing Systems 04, no. 01 (June 2005): 53–67. http://dx.doi.org/10.1142/s0219686705000576.

Full text

Abstract:

Regenerative chatter is a major hurdle to the productivity and quality of machining operations. This is because of the undesirable surface finish, excessive tool wear and deteriorated dimensional accuracy. Machining chatter analysis techniques examine the stability of a closed-loop model of machining forces and tool-workpiece system. This model is based on mathematical manipulations of machining forces and the dynamic responses of machining tooling. Almost all techniques derive the dynamic responses from physical test. In this paper, a novel approach of milling chatter stability analysis is introduced by using FEA applications to obtain the dynamic responses of the machine tool. The accuracy of this methodology is validated by machine shop tests.

APA, Harvard, Vancouver, ISO, and other styles

30

Kósa, Janos. "Theoretical and Experimental Results of DC and AC Magnetic Flux Transformation Using HTS Superconducting Closed Loop." Advanced Materials Research 354-355 (October 2011): 1265–72. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.1265.

Full text

Abstract:

This paper presents the results of my experiments that may open a new path for advanced applications by using continuous closed superconducting YBCO loops. I examined a novel arrangement of a perfectly closed superconducting loop made of HTS wire in DC and AC flux transformer. I designed a self-limiting transformer with this solution. At the same time I also tested the operation of the continuous YBCO loop developed with my own technology. In the first experiment I used YBCO superconducting rings made from a bulk. Later I used superconducting wire. I could carry out these experiments because earlier I had elaborated the machining of the YBCO bulk and wire.

APA, Harvard, Vancouver, ISO, and other styles

31

Sun, X. W., Fei Hu Zhang, Shen Dong, and L. J. Zhang. "Research on Low Speed Servo Control Technology of Ultra-Precision Machine Tool." Key Engineering Materials 339 (May 2007): 163–67. http://dx.doi.org/10.4028/www.scientific.net/kem.339.163.

Full text

Abstract:

An ultra-precision machine is developed by Precision Engineering Research Institute of Harbin Institute of Technology to machine components made of KDP crystal with single point diamond fly cutting technique . A stable ultra-low speed feed of worktable is necessary in the machining process inasmuch as the KDP crystal components to be machined must be high form accuracy, low surface roughness and low surface waveness . This paper analyses the effect on speed stability and positioning accuracy under the control of semi-closed loop and full-closed loop based on the experimental data, and also present a compensating control algorithm of error disturbance feed-forward which enhances the stability of ultra-low speed motion of the semi-closed loop feed control servo system of the machine. The simulation results indicate that the values of the steadystate tracking error decreased to 1/10 after using compensating control algorithm. The P-V value of the aluminum specimen machined by the ultra-precision machine tool was 0.27 wavelengths.

APA, Harvard, Vancouver, ISO, and other styles

32

Chen, Y. J., and B. Ravani. "Offset Surface Generation and Contouring in Computer-Aided Design." Journal of Mechanisms, Transmissions, and Automation in Design 109, no. 1 (March 1, 1987): 133–42. http://dx.doi.org/10.1115/1.3258777.

Full text

Abstract:

Two computational techniques are presented for Computer-Aided Design (CAD) and Machining (CAM) of parametrically defined surfaces. One technique deals with construction of offset surfaces. An algorithm is presented that would allow detection and removal of the closed loop on the offset surface due to its self-intersection. The second computational technique presented deals with contouring of parametric surfaces. The technique presented allows for optimal generation of planar contour lines. The results are applied to Numerical Control (NC) machining of surfaces.

APA, Harvard, Vancouver, ISO, and other styles

33

Hu, Po, Zhenyu Han, Hongya Fu, and Dedong Han. "Architecture and implementation of closed-loop machining system based on open STEP-NC controller." International Journal of Advanced Manufacturing Technology 83, no. 5-8 (August 14, 2015): 1361–75. http://dx.doi.org/10.1007/s00170-015-7631-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Rubio Rodriguez, Luis, Asier Ibeas, and László E. Kollár. "On the sliding mode control for precision machining." Mérnöki és Informatikai Megoldások, no. II. (October 20, 2020): 32–41. http://dx.doi.org/10.37775/eis.2020.2.4.

Full text

Abstract:

Precision machining uses linear motor actuators in order to deal with robustness and stability in the broad range of cutting conditions. Those systems are demanding more sophisticated control algorithms in order to fulfil each time more exigent tolerances in the tendency to miniaturization of products and to face more robust dynamics. Sliding mode control family is natural approach to cope with mass and damping variation and external disturbances which are inherent characteristics of cutting processes. This paper compares conventional and super-twisting sliding mode controls on keeping the closed loop dynamics within requirements and reject disturbances created by the cutting forces.

APA, Harvard, Vancouver, ISO, and other styles

35

Wan, Neng, and Yang Yang. "Research on a New Model of MBD-Based Machining Process Design." Applied Mechanics and Materials 121-126 (October 2011): 1058–62. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1058.

Full text

Abstract:

In order to change the incompleteness of data link, tediousness of data conversion and unclearness of process expression in the traditional two-dimensional machining process design, this paper researches on a new model of MBD-based one. The author proposes the 3Dprocess model as the carrier to manufacture information, and establishes closed loop architecture composed of 3D machining process design, 3D process management and feedback of field application of 3Dmachining process. The author then analyzes the composition elements of machining process model under the condition of MBD, proposes the establishment of machining process ontology and geometric modeling ontology, and achieves the conversion between these two. This paper researches on the composition of MBD machining process card, establishes the mapping relation between process expression elements and process card elements in the 3Dmachining process model, and ultimately realizes the machining process design in the 3Denvironment.

APA, Harvard, Vancouver, ISO, and other styles

36

Lee, S. J., S. G. Kapoor, and R. E. DeVor. "An Integrated Machining Process Design Simulator for the Optimal Design of Face Milling Systems." Journal of Engineering for Industry 107, no. 4 (November 1, 1985): 301–8. http://dx.doi.org/10.1115/1.3186002.

Full text

Abstract:

An Integrated Machining Process Design Simulator (IMPDS) is developed and applied as a general tool for the design of face milling systems. The simulator includes four modules to accommodate the important factors that affect face milling operations. These modules are: a general purpose finite element program to analyze structural characteristics, a mechanistic face milling force module for both open-loop and closed-loop cutting force simulations, a machinability module to evaluate cutting process performance, and an efficient optimization module to automate the design process. The design variables, constraints, and objective function of the entire system include structural element size, shape, and weight, cutting forces and vibrations, and other machinability measures including tool life, metal removal rate, and surface finish. Several examples are included to demonstrate the capability of IMPDS in the machining system design process.

APA, Harvard, Vancouver, ISO, and other styles

37

Chryssolouris, G., P. Sheng, and F. von Alvensleben. "Process Control of Laser Grooving Using Acoustic Sensing." Journal of Engineering for Industry 113, no. 3 (August 1, 1991): 268–75. http://dx.doi.org/10.1115/1.2899696.

Full text

Abstract:

This paper discusses a closed-loop control concept for laser machining. A key development in the proposed control scheme is an acoustic sensor for inferring hole, kerf, and groove geometry in real time during laser machining. By sensing the acoustic signal emitted from the impingement of a gas jet on the erosion front, correlations between resonant frequency and hole, kerf or groove geometry were found. A process model was developed from applying the wave equation to the case of an elliptically-expanding or a constant-area jet. Experiments showed an inverse relationship between depth of cut and resonant frequency for grooving, cutting, and drilling cases. The paper also includes preliminary simulation results of a closed-lop control scheme for laser grooving using acoustic sensing and a PID controller.

APA, Harvard, Vancouver, ISO, and other styles

38

Jin, Yan, and Hui Lin. "Study on High Precision Control Scheme of Ceramic Ferrule Concentricity Grinder." Applied Mechanics and Materials 635-637 (September 2014): 1266–70. http://dx.doi.org/10.4028/www.scientific.net/amm.635-637.1266.

Full text

Abstract:

The paper analyzes the precision coaxial processing requirements and the characteristics of high automatic online compensation, and builds the electric control system based on Delta series products. The system uses a bus controller and absolute encoders servo constitute nearly closed-loop servo control system, combined with torque limiting grading feeding, dressing real-time compensation, stable and high-speed precision machining ceramic ferrule.

APA, Harvard, Vancouver, ISO, and other styles

39

Hendzel, Zenon, Andrzej Burghardt, Piotr Gierlak, and Marcin Szuster. "Conventional and Fuzzy Force Control in Robotised Machining." Solid State Phenomena 210 (October 2013): 178–85. http://dx.doi.org/10.4028/www.scientific.net/ssp.210.178.

Full text

Abstract:

This article presents an application of the hybrid position-force control of the robotic manipulator with use of artificial neural networks and fuzzy logic systems in complex control system. The mathematical description of the manipulator and a closed-loop system are presented. In the position control were used the PD controller and artificial neural networks, which compensate nonlinearities of the manipulator. The paper presents mainly the application of various strategies of the force control. The force control strategies using conventional controllers P, PI, PD, PID and fuzzy controllers are presented and discussed. All of the control methods were verified on the real object in order to make a comparison of a control quality.

APA, Harvard, Vancouver, ISO, and other styles

40

Fan, Wei, Lianyu Zheng, Wei Ji, Xun Xu, Lihui Wang, Yuqian Lu, and Xiong Zhao. "Function block-based closed-loop adaptive machining for assembly interfaces of large-scale aircraft components." Robotics and Computer-Integrated Manufacturing 66 (December 2020): 101994. http://dx.doi.org/10.1016/j.rcim.2020.101994.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Landers, Robert G., and A. Galip Ulsoy. "Model-Based Machining Force Control." Journal of Dynamic Systems, Measurement, and Control 122, no. 3 (October 20, 1999): 521–27. http://dx.doi.org/10.1115/1.1286821.

Full text

Abstract:

Regulating machining forces provides significant economic benefits by increasing operation productivity and improving part quality. Machining force regulation is a challenging problem since the force process varies significantly under normal operating conditions. Since fixed-gain controllers cannot guarantee system performance and stability as the force process varies, a substantial research effort has been invested in the development of adaptive force controllers. However, adaptive controllers can be difficult to develop, analyze, implement, and maintain due to their inherent complexity. Consequently, adaptive machining force controllers have found little application in industry. In this paper, a model-based machining force control approach, which incorporates detailed force process models, is introduced. The proposed design has a simple structure and explicitly accounts for the changes in the force process to maintain system performance and stability. Two model-based machining force controllers are implemented in face milling operations. The stability robustness of the closed-loop system with respect to model parameter uncertainties is analyzed, and the analysis is verified via simulation and experimental studies. [S0022-0434(00)02303-0]

APA, Harvard, Vancouver, ISO, and other styles

42

Weiss, Benjamin, Duane W. Storti, and Mark A. Ganter. "Low-cost closed-loop control of a 3D printer gantry." Rapid Prototyping Journal 21, no. 5 (August 17, 2015): 482–90. http://dx.doi.org/10.1108/rpj-09-2014-0108.

Full text

Abstract:

Purpose – The purpose of this paper is to explore the improvements in speed and precision achievable using straightforward closed-loop control for the gantry motion in additive manufacturing machines. The authors designed and built an economically viable demonstration system to quantify the performance improvement. Design/methodology/approach – The authors develop and evaluate a low-cost closed-loop controller for the X and Y axes of an entry-level three-dimensional (3D) printer. The system developed captures and compensates for the dynamics of the motor and the belt-driven stage and detects mechanical errors, such as skipped motor steps. Findings – The system produces path-following precision improvements of 40 and 75 per cent for two different sample trajectories. Correcting for skipped steps increases reliability and allows for more aggressive tuning of motion parameters; time savings of up to 25 per cent are seen by doubling acceleration rate. Research limitations/implications – The system presented provides an appropriate platform for further investigation into more complex, application-specific controllers and inclusion of more details of the printer dynamics that could produce still greater improvements in speed and accuracy. Practical implications – The performance, low cost (40 USD/axis) and applicability to the majority of sub-2000USD 3D printer designs make this work of practical significance. Originality/value – The CNC machining industry has for many years used similar approaches, but application to 3D printers has not been explored in the literature. This paper demonstrates the value of even a simple controller applicable to almost any 3D printer, while maintaining cost-effectiveness of the solution in a competitive market.

APA, Harvard, Vancouver, ISO, and other styles

43

Li, Xiao Hai, Li Ping Zhao, Ying Chun Shi, and Li Jie Zhao. "Study on Micro Electrochemical Machining Technology and its Influencing Factors." Applied Mechanics and Materials 395-396 (September 2013): 1062–65. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.1062.

Full text

Abstract:

Electrochemical machining (ECM) is an anodic dissolution process of metal as anode ion by ion, and micro-ECM is a promising micromachining method at micro to meso-scale. Thus, a micro-ECM setup was developed to fabricate micro parts and explore the feasibility of micro-ECM at micro to meso-scale, including the design of high-frequency micro-energy pulse power supply. By using the detection unit of machining state and optical encoder, a closed loop control system for micro-ECM was developed. Under low concentration of passivating electrolyte, low machining voltage, micro rotating electrode and high-frequency short-pulse current, the machining gap can be reduced to about 10μm. The influence factors of the additives and the rotation of micro electrode on micro ECM were analysed by experiments. A micro-hole about 30μm in diameter was drilled by the rotating micro electrode.

APA, Harvard, Vancouver, ISO, and other styles

44

Takaya, Yasuhiro. "In-Process and On-Machine Measurement of Machining Accuracy for Process and Product Quality Management: A Review." International Journal of Automation Technology 8, no. 1 (January 5, 2014): 4–19. http://dx.doi.org/10.20965/ijat.2014.p0004.

Full text

Abstract:

In-process and on-machine measurements are used to evaluate a variety of machining factors and conditions as well as the work done on the machine tool. With the increasing complexity of machining processes and greater requirements for accuracy and precision, the demand for advanced methods for process optimization has also increased. To meet this demand, process quality management (QM) requires an expansion of manufacturing metrology to include comprehensive closed-loop control of the machining process. To eliminate the effects of disturbances on the machining process and adjust the control quantities to optimal values for robustness, in-process and on-machine measurements are very essential. In this paper, we review technical trends in in-process and on-machine measurements for process QM and conventional quality control (QC) of products. Spreading measurement targets and applications are comprehensively reviewed.

APA, Harvard, Vancouver, ISO, and other styles

45

Fassois, S. D., K. F. Eman, and S. M. Wu. "A Fast Algorithm for On-Line Machining Process Modeling and Adaptive Control." Journal of Engineering for Industry 111, no. 2 (May 1, 1989): 133–39. http://dx.doi.org/10.1115/1.3188742.

Full text

Abstract:

A fast, on-line algorithm for machining process modeling and control is proposed. The modeling is accomplished via a new recursive estimator that offers good accuracy at a minimal computational load. Its Fast Kalman-type version, that further reduces its computational complexity, is also presented. The adaptive controller, which is based on on-line identification and closed-loop pole assignment, is characterized by a low computational load and no need for a priori process information. The analytical results are supplemented by numerical simulations, where the proposed scheme is used for the control of a turning operation and shown to offer very good performance under noisy conditions and suddenly changing machining dynamics.

APA, Harvard, Vancouver, ISO, and other styles

46

Becker, Dina, Steffen Boley, Rocco Eisseler, Thomas Stehle, Hans-Christian Möhring, Volkher Onuseit, Max Hoßfeld, and Thomas Graf. "Influence of a closed-loop controlled laser metal wire deposition process of S Al 5356 on the quality of manufactured parts before and after subsequent machining." Production Engineering 15, no. 3-4 (March 1, 2021): 489–507. http://dx.doi.org/10.1007/s11740-021-01030-w.

Full text

Abstract:

AbstractThis paper describes the interdependence of additive and subtractive manufacturing processes using the production of test components made from S Al 5356. To achieve the best possible part accuracy and a preferably small wall thickness already within the additive process, a closed loop process control was developed and applied. Subsequent machining processes were nonetheless required to give the components their final shape, but the amount of material in need of removal was minimised. The effort of minimising material removal strongly depended on the initial state of the component (wall thickness, wall thickness constancy, microstructure of the material and others) which was determined by the additive process. For this reason, knowledge of the correlations between generative parameters and component properties, as well as of the interdependency between the additive process and the subsequent machining process to tune the former to the latter was essential. To ascertain this behaviour, a suitable test part was designed to perform both additive processes using laser metal wire deposition with a closed loop control of the track height and subtractive processes using external and internal longitudinal turning with varied parameters. The so manufactured test parts were then used to qualify the material deposition and turning process by criteria like shape accuracy and surface quality.

APA, Harvard, Vancouver, ISO, and other styles

47

Zhang, Ke, Zhi Xue Liu, Li Xiu Zhang, He Wang, and Yu Hou Wu. "The Simulation Research of High-Speed Motorized Spindle Vector Control System with a Fuzzy Speed Controller." Advanced Materials Research 694-697 (May 2013): 1864–68. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.1864.

Full text

Abstract:

The quality of high-speed machining workpiece is determined by drive control performance of motorized spindle. Vector control is one of high-speed motorized spindle control method, but the traditional controller is difficult to effectively overcome parameter disturbances caused by parameter variations from internal and external system. So it is necessary to use intelligent control. In this paper, a model of a speed and flux-closed-loop vector control system with an inner torque-closed loop is established, and a fuzzy controller is used to adjust the speed. MATLAB is used for load simulation of high-speed segment of motorized spindle, and then the simulation results show that high-speed motorized spindle can be increased in to the high-speed segment using a short period of time, and it has strong anti-interference ability and excellent performance at the same time in the control system presented in this paper.

APA, Harvard, Vancouver, ISO, and other styles

48

Li, Yang, Jun Zhang, Dongxu Su, Changxing Zhou, and Wanhua Zhao. "Experiment-based thermal behavior research about the feed drive system with linear scale." Advances in Mechanical Engineering 10, no. 11 (November 2018): 168781401881235. http://dx.doi.org/10.1177/1687814018812359.

Full text

Abstract:

Positioning error of the feed drive system has great influence of the machining quality. In order to guarantee the positioning accuracy, the linear grating scale is adopted to form a full-closed loop. However, due to the inner heat sources and environmental temperature variations, the linear grating scale could expand and the thermally induced positional deviation is generated. In this article, temperatures and positional deviations of the ball screw feed drive system and the linear motor feed drive system equipped with linear scales were tested. The factors that affect the positioning error were analyzed. Then, the temperatures and positioning coordinates were used as inputs to build the thermally induced positional deviation model of full closed-loop feed drive system. Based on the model, coordinate values of the machine tool were adjusted and the compensation was implemented. The testing results verified that after compensation, the positional deviations were greatly reduced.

APA, Harvard, Vancouver, ISO, and other styles

49

Minis, I. E., E. B. Magrab, and I. O. Pandelidis. "Improved Methods for the Prediction of Chatter in Turning, Part 3: A Generalized Linear Theory." Journal of Engineering for Industry 112, no. 1 (February 1, 1990): 28–35. http://dx.doi.org/10.1115/1.2899292.

Full text

Abstract:

The linear theory of chatter has been generalized to any machining configuration without a priori assumptions on either the direction of the cutting force or the modal directions of the machine tool structure. Furthermore, the effects of the tool’s orientation on the stability of the machining system are directly expressed by its closed loop characteristic equation. Using experimental measurements for the dynamics of both the machine tool structure and the cutting process obtained previously under actual cutting conditions, the proposed theory is applied to two cases of orthogonal turning. The resulting predictions of the critical depth of cut are in excellent agreement with the measurements of actual chatter for a wide range of cutting conditions.

APA, Harvard, Vancouver, ISO, and other styles

50

García Plaza, Eustaquio, Pedro Jose Núñez López, Francisco Mata, and A. Sanz. "Machining Control of Surface Roughness by Measuring Cutting Forces." Advanced Materials Research 498 (April 2012): 157–62. http://dx.doi.org/10.4028/www.scientific.net/amr.498.157.

Full text

Abstract:

The primary aim of this study was to design and develop an on-line control system of finished surfaces in automated machining process by CNC turning. The control system consisted of two basic phases: during the first phase, surface roughness was monitored through cutting force signals; the second phase involved a closed-loop adaptive control system based on data obtained during the monitoring of the cutting process. The system ensures that surfaces roughness is maintained at optimum values by adjusting the feed rate through communication with the PLC of the CNC machine. A monitoring and adaptive control system has been developed that enables the real-time monitoring of surface roughness during CNC turning operations. The system detects and prevents faults in automated turning processes, and applies corrective measures during the cutting process that raise quality and reliability reducing the need for quality control.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!