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Zeitschriftenartikel zum Thema „Volumetric compensation“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 12. Februar 2022

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1

Zhang, Hong Xin, und Qian Jian Guo. „Research on Volumetric Error Measurement, Modeling and Compensation for NC Machine Tools“. Applied Mechanics and Materials 513-517 (Februar 2014): 4202–5. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.4202.

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With the increasing requirements of the machining accuracy of CNC machine tools, the impact of thermal deformation is growing. Thermal error compensation technology can predict and compensate the thermal errors in real-time, and improve the machining accuracy of the machine tool. In this paper, the research objects of thermal error compensation is expanded to the volumetric error of the machine tool, the volumetric error modeling of a three-axis machine tool is fulfilled and a compensator is developed for the compensation experiment, which provides scientific basis for the improvement of the machining accuracy.

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Guo, Qian Jian, Qing Wen Qu und Jian Guo Yang. „Application of Ant Colony Algorithm to Volumetric Thermal Error Modeling and Compensation of a CNC Machine Tool“. Applied Mechanics and Materials 170-173 (Mai 2012): 3487–90. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3487.

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Volumetric errors are the major contributor to the dimensional errors of a workpiece in precision machining. Error compensation technique is a cost-effective way to reduce volumetric errors. Accurate modeling of volumetric errors is a prerequisite of error compensation. In this paper, a volumetric error model was proposed by using neural networks based on ant colony algorithm. Finally, a volumetric error compensation system was developed based on the proposed model, and which has been applied to a CNC machine tool in daily production. The results show that the volumetric errors are reduced and the machining accuracy of the machine tool is improved.

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3

Wang, K., X. Sheng und R. Kang. „Volumetric Error Modelling, Measurement, and Compensation for an Integrated Measurement-Processing Machine Tool“. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, Nr. 11 (27.04.2010): 2477–86. http://dx.doi.org/10.1243/09544062jmes2200.

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The volumetric error of a measurement-processing integrated machine tool was studied by using a complicated surface workpiece grinding machine as a special example. The model of volumetric error was established by using homogeneous transformation matrices, and the effect of volumetric error on coordinate transformation between the measurement and the processing work station was analysed. Various error components of the machine tool were measured with a laser interferometer and an electronic level, and the volumetric error was compensated by external software. With a ball bar system and grinding experiments, the volumetric position accuracy was tested after compensation. The experiment results illustrated that both the volumetric position accuracy and machining precision were improved dramatically after compensation.

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Galetto, Maurizio, Luca Mastrogiacomo, Giovanni Moroni und Stefano Petrò. „Volumetric Error Compensation for the MScMS-II“. Procedia CIRP 10 (2013): 98–104. http://dx.doi.org/10.1016/j.procir.2013.08.018.

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5

Holub, Michal, Petr Blecha, Frantisek Bradac und Roman Kana. „VOLUMETRIC COMPENSATION OF THREEAXIS VERTICAL MACHINING CENTRE“. MM Science Journal 2015, Nr. 03 (10.09.2015): 677–81. http://dx.doi.org/10.17973/mmsj.2015_10_201534.

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6

Cajal, C., J. Santolaria, J. Velazquez, S. Aguado und J. Albajez. „Volumetric Error Compensation Technique for 3D Printers“. Procedia Engineering 63 (2013): 642–49. http://dx.doi.org/10.1016/j.proeng.2013.08.276.

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7

Lu, Ying-Chen, und Syh-Shiuh Yeh. „Using the Segmented Iterative Learning Control Method to Generate Volumetric Error-Compensated Part Programs for Three-Axis CNC Milling Machine Tools“. Journal of Manufacturing and Materials Processing 2, Nr. 3 (13.08.2018): 53. http://dx.doi.org/10.3390/jmmp2030053.

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This study proposes using the iterative learning control method to adjust the volumetric error-compensated tool path, where the working volume motion accuracy of three-axis computerized numerical control (CNC) milling machine tools is increased by segmented modification of the part program. As the three-axis CNC milling machine tools generally have volumetric error of working volume, this study refers to the measured and established table of volumetric errors and uses the method of the modifying part program for volumetric error compensation of machine tools. This study proposes using part-program single-block positioning segmented for volumetric error compensation, as the generated compensated part program with multiple compensated blocks can effectively compensate the volumetric error of working volume in the tool moving process. In terms of the compensated tool path computing method, this study uses the iterative learning control (ILC) method and refers to compensated tool path and volumetric errors along the compensated tool path for iterative computation. Finally, a part program with multiple blocks is modified by the converged optimal compensated tool path, in order that the modified part program has higher-precision volumetric error compensation effect. The simulation result shows that the rate of improvement of error of the volumetric error compensation method proposed in this study is 70%. The result of cutting tests shows that the average rate of improvement of the straightness error of the test workpiece is 60%, while the average rate of improvement of height error is 80%. Therefore, the results of simulation and cutting tests can prove the feasibility of using the ILC method for segmented modification of the volumetric error-compensated part programs proposed in this study.

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Zhang, Yi, Jianguo Yang, Sitong Xiang und Huixiao Xiao. „Volumetric error modeling and compensation considering thermal effect on five-axis machine tools“. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, Nr. 5 (03.08.2012): 1102–15. http://dx.doi.org/10.1177/0954406212456475.

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This article intends to provide an error compensation system for five-axis machine tools. A volumetric error model is established with homogeneous transformation matrix method, from which compensation values of both orientation and position errors can be obtained. Thirty-seven errors on a five-axis machine tool are classified into three categories – functional, random, and negligible errors, among which the effect of the first one on volumetric accuracy is considered as great enough to be included in this model. Some typical modeling methods are discussed on positioning and straightness errors, considering both geometric and thermal effects. Then, we propose a compensation implementation technique based on the function of external machine zero point shift and Ethernet data communication protocol for machine tools. Finally, laser diagonal measurements have been conducted to validate the effectiveness of the proposed volumetric error compensation system.

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Wang, Shih Ming, Han Jen Yu und Hung Wei Liao. „A Low Cost and Efficient Volumetric-Error Measurement Method for Five-Axis Machine Tools“. Applied Mechanics and Materials 284-287 (Januar 2013): 1723–28. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.1723.

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Error compensation is an effective and inexpensive way that can further enhance the machining accuracy of a multi-axis machine tool. The volumetric error measurement method is an essential of the error compensation method. The measurement of volumetric errors of a 5-axis machine tool is very difficult to be conducted due to its complexity. In this study, a volumetric-error measurement method using telescoping ball-bar was developed for the three major types of 5-axis machines. With the use of the three derived error models and the two-step measurement procedures, the method can quickly determine the volumetric errors of the three types of 5-axis machine tools. Comparing to the measurement methods currently used in industry, the proposed method provides the advantages of low cost, easy setup, and high efficiency.

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Majda, Paweł, und Joanna Jastrzębska. „Selection of numerical compensation model of geometric errors of machine tools“. Mechanik 91, Nr. 11 (12.11.2018): 980–83. http://dx.doi.org/10.17814/mechanik.2018.11.175.

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After many years of intensive work, experts from ISO TC 39 have published the technical report ISO TR 16907 “Machine tools – numerical compensation of geometric errors”. This document defines the terminology, presents advantages and limitations of numerical compensation of machine tool and measuring machine. This gives machine manufacturers and users important information on the application of numerical compensation. In the context of the compensation types defined in ISO TR 16907, presented principles of selecting volumetric error models for three-axis machine tools. The principles of reducing these models due to the functional tasks of machine tools were also presented. The final result is a table of reduced models for three-axis machine tools. It determines the degree of the model and the experimental test program, which should be done to determine volumetric error.

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Lu, Yu Xia, und M. N. Islam. „Application of a Newly Developed Thermally Induced Volumetric Error Compensation Model in Improving Dimensional Accuracy of Parts“. Advanced Materials Research 651 (Januar 2013): 530–37. http://dx.doi.org/10.4028/www.scientific.net/amr.651.530.

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The thermally induced volumetric error of a machine tool has been recognised as a major contributor to the dimensional and geometric errors of component parts produced by that tool. Therefore, considerable research has focused on ways to compensate for this type of error. The traditional model of compensation for the thermally induced volumetric error of a three-axis machine tool requires the measurement of 21 geometric error components and their variations with temperature, which is difficult and time-consuming to conduct. In our previous research, we developed a simplified and economical method of compensation of thermally induced volumetric error by modeling the positioning error as functions of ball-screw nut temperature and travel distance. This paper describes the application of this newly developed compensation model in improving the dimensional accuracy of parts. The model was applied to reduce the positioning error of a number of drilled holes. The results showed an average reduction of absolute and relative errors by 30.44 μm and 77%, respectively.

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Liu, Yi Lei, Dong Gao und Gang Wei Cui. „Volumetric Error Model of Large CNC Machine Tool and Verification Based on Particle Swarm Optimization“. Key Engineering Materials 579-580 (September 2013): 76–79. http://dx.doi.org/10.4028/www.scientific.net/kem.579-580.76.

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Volumetric error has large effect on machine tool accuracy; improving CNC machine tool accuracy through error compensation has received significant attention recently. This paper intends to represent volumetric error measurement based on laser tracker. The volumetric error is modeled by homogenous transformation matrix with each coordinate corresponding to each motion axis. Based on parts of spatial points volumetric error, the geometric errors which affect volumetric positioning error are verified through particle swarm optimization with the L2 parameters as the target function. The chebyshev orthogonal polynomials are applied to approximate geometric errors.

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Cajal, Carlos, Jorge Santolaria, David Samper und Jesus Velazquez. „Efficient volumetric error compensation technique for additive manufacturing machines“. Rapid Prototyping Journal 22, Nr. 1 (18.01.2016): 2–19. http://dx.doi.org/10.1108/rpj-05-2014-0061.

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Purpose – This paper aims to present a methodology for volumetric error compensation. This technique is applied to an Objet Eden350V 3D printer and involves a custom measurement strategy. Design/methodology/approach – The kinematic model of the printer is explained, and its error model is simplified to 18 independent error functions. Each error function is defined by a cubic Legendre polynomial. The coefficients of the polynomials are obtained through a Levenberg–Marquardt optimization process. This optimization process compares, in an iterative algorithm, nominal coordinates with actual values of the cloud of points. The points are built in the faces of a gauge artefact as conical sockets defining one unique point for each socket. These points are measured by a coordinate measuring machine self-centring measurement process. Findings – Most of the errors of the 3D printer are systematic. It is possible to obtain an improvement of 70 per cent in terms of global mean error reduction in single points within a volume of 120 × 120 × 40 mm. The forecast of the final error compensation fully matches the actual final error. Practical implications – This methodology can be used for accuracy improvement in additive manufacturing machines. Originality/value – Unlike the calculation of geometric errors, the proposed parametric determination through optimization of the error model allows global error reduction, which decreases all sort of systematic errors concurrently. The proposed measurement strategy allows high reliability, high speed and operator independence in the measurement process, which increases efficiency and reduces the cost. The proposed methodology is easily translated to other rapid prototyping machines and allows scalability when replicating artefacts covering any working volume.

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Lu, Yuxia, und M. N. Islam. „A new approach to thermally induced volumetric error compensation“. International Journal of Advanced Manufacturing Technology 62, Nr. 9-12 (11.01.2012): 1071–85. http://dx.doi.org/10.1007/s00170-011-3849-6.

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15

Wang, Jin Dong, Jun Jie Guo, Yu Fen Deng und Hai Tao Li. „Method of Volumetric Error Compensation for 3-Axis NC Machine Tool“. Advanced Materials Research 472-475 (Februar 2012): 2371–76. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2371.

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Error compensation is an effective method to improve the machining accuracy of NC machine tool. A laser tracker is used to rapidly and accurately detect the geometric error of NC machine tool in the paper. The machine tool is controlled to move on the preset path in the space, and a laser tracker is used to measure the motion trajectory of the machine tool. Each geometric error can be identified by error separation. Based on the error model of 3-axis machine tool, error compensation can be carried out by modifying the machining process (G code). Results of experiment show that, this measurement method is feasible, and modifying the G code for error compensation is also effective.

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Paweł, Majda, und Joanna Jastrzębska. „Simplifications of the volumetric error model because of the structural loop of machine tools“. Archives of Mechanical Technology and Materials 39, Nr. 1 (01.01.2019): 11–15. http://dx.doi.org/10.2478/amtm-2019-0003.

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Abstract After many years of intensive work the international experts from ISO TC 39 published the technical report called ISO TR 16907 “Machine tools – numerical compensation of geometric errors”. This document defines the terminology, presents benefits and limitations of numerical compensation of machine tools’ and measuring machines’ errors. It gives machines manufacturers and users vital information about how to use numerical compensation. In the context of those types of compensation defined in ISO TR 16907, this article shows rules of selecting models of Volumetric Error for three-axis machine tools. What is more, this paper presents some principles of reduction of these proposed models because of the functional tasks for machine tools. One of the obtained results is an array of reduced models for three-axis machine tools. This array determines the degree of detail of the model and the experimental research program that needs to be carried out in order to determine the Volumetric Error distribution.

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Nicholson, P. G., R. B. Seed und H. A. Anwar. „Elimination of membrane compliance in undrained triaxial testing.II. Mitigation by injection compensation“. Canadian Geotechnical Journal 30, Nr. 5 (01.10.1993): 739–46. http://dx.doi.org/10.1139/t93-066.

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A computer-controlled injection-correction system has been developed to continuously and completely mitigate the adverse effects of membrane compliance for undrained testing of granular soils. The system was developed with the explicit idea that it could be quickly and easily adapted to most any up to date triaxial testing apparatus. A relationship between effective confining stress and volumetric compliance can be predetermined, as volumetric-compliance errors have been shown to be a direct and repeatable function of effective confining stresses for a given material. The predetermination of volumetric-compliance errors represents a suitable basis for control of injection–removal compensation for membrane compliance during undrained testing. A closed-loop computer-controlled system continuously monitors changes in sample effective confining stresses such that precalculated volumetric-compliance errors can be continuously offset by injecting or removing volumes of water equal to those errors throughout the duration of each test. The validity of the injection system was verified by comparison of the compensated tests to results of large-scale (300 mm diameter) tests of the same materials, as compliance effects for large-scale tests of this material were negligible. Key words : membrane, penetration, compliance, undrained testing, triaxial, compensation, liquefaction.

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Wang, Xiu Shan, Jian Guo Yang, Hao Wu und Jia Yu Yan. „Real Time Thermal Error Modeling and Compensation of 5-Axis NC Grinding Machine Tool“. Key Engineering Materials 359-360 (November 2007): 210–14. http://dx.doi.org/10.4028/www.scientific.net/kem.359-360.210.

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The thermal error model of the 5-axis grinding machine tool was acquired by the homogeneous coordinate transformation, including 17 thermal error components. The thermal volumetric error real time compensation model was built by using the multiple regression analysis. The thermal error compensation control system and the temperature sensing system were developed and used as real-time compensation for the 5-axis grinding machine tool.

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Holub, Michal, Robert Jankovych, Jan Vetiska, Jan Sramek, Petr Blecha, Jan Smolik und Petr Heinrich. „Experimental Study of the Volumetric Error Effect on the Resulting Working Accuracy—Roundness“. Applied Sciences 10, Nr. 18 (08.09.2020): 6233. http://dx.doi.org/10.3390/app10186233.

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Currently, various types of software compensations are applied to machine tools. Their aim is to increase the working accuracy of the tools. The improvement in working accuracy is then further assessed according to the increase in the dimensional and shape accuracy or the surface quality of the workpiece. This publication describes the effects of the volumetric accuracy of a machine tool on the working accuracy of a workpiece, where total roundness (RONt) is evaluated in multiple cuts. In the experiment, two test workpieces are manufactured on a three-axis milling machining centre. The first is made using a standard machine setup while the second with activated volumetric compensation. The LaserTRACER self-tracking laser interferometer is used to compensate for volumetric accuracy. In the second part, verification measurements are performed with a Ballbar, where roundness error is evaluated according to ISO 230-4. Then two test workpieces are machined, and, in the last part, measurement is performed on Talyrond 595S roundness measuring equipment. Finally, the results are analysed and the dependence between the volumetric accuracy, the circularity error of the machine and the working accuracy of the CNC machine tool is established, represented by the RONt of the workpiece. This paper presents new and unpublished relations between the volumetric accuracy of the machine tool and the RONt of the workpiece.

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Shen, J. H., H. T. Zhang, Hong Tao Cao, Jian Guo Yang und C. Wang. „Volumetric Positioning Errors of CNC Machining Tools and Laser Sequential Step Diagonal Measurement“. Key Engineering Materials 315-316 (Juli 2006): 98–102. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.98.

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The volumetric positioning precision of CNC machine tools is the key factor to get high machining precision, so the analysis, measurement and compensation of the volumetric error is becoming more and more important. In this paper, the modeling results of 3-axes CNC machine tools with four different configurations are given based on rigid body theory and homogeneous coordination transformation matrices. An improved sequential step diagonal measurement method is proposed and analyzed because the current laser measurement methods are complex and time cost. At the final section of the paper, the measurement data was applied into the error compensation and the sequential step diagonal measurement method was validated efficient and convenient.

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Ni, J., und S. M. Wu. „An On-Line Measurement Technique for Machine Volumetric Error Compensation“. Journal of Engineering for Industry 115, Nr. 1 (01.02.1993): 85–92. http://dx.doi.org/10.1115/1.2901643.

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A hybrid on-line and off-line measurement technique is developed for machine volumetric error compensation based on a multiple-degree-of-freedom laser optical system. When implemented on a 3-axis machine up to 15 geometric error components can be measured simultaneously on-line and the remaining 6 components need to be calibrated off-line. Since the on-line measurement systems use different metrology bases, a modified volumetric error model is derived for a milling machine by considering the measurement features of the multiple-degree-of-freedom system. Through experimental tests, it was found that the discrepancy between the identified errors and the actual errors was less than 4 μm out of a maximum range of 20 μm.

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DeLorenzo, Christine, Xenophon Papademetris, Lawrence H. Staib, Kenneth P. Vives, Dennis D. Spencer und James S. Duncan. „Volumetric Intraoperative Brain Deformation Compensation: Model Development and Phantom Validation“. IEEE Transactions on Medical Imaging 31, Nr. 8 (August 2012): 1607–19. http://dx.doi.org/10.1109/tmi.2012.2197407.

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23

Pham, D. T., A. Ivanov, S. Bigot, K. Popov und S. Dimov. „A study of micro-electro discharge machining electrode wear“. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 221, Nr. 5 (01.05.2007): 605–12. http://dx.doi.org/10.1243/0954406jmes413.

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This paper studies the influence of factors contributing to electrode wear during the micro-electro discharge machining (EDM) process. The paper proposes a method for calculating the volumetric wear ratio based only on geometrical information obtained from the process. The objective of the work is to investigate the suitability of micro-EDM electrode wear compensation methods. Electrode shape deformation and random variations in the volumetric wear are studied as two main factors affecting the applicability of wear compensation methods as well as indicating the accuracy achievable with micro-EDM. EDM drilling and EDM milling are regarded as separate processes as they require different approaches in investigating and implementing the results of the study.

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Liu, Guo Liang, H. T. Zhao, G. Turyagye, Y. Q. Ren, Jian Guo Yang, Wen Zhe Chen und S. W. He. „Real-Time Error Compensation Technique and Its Application on NC Machine Tools“. Materials Science Forum 471-472 (Dezember 2004): 587–91. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.587.

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This paper presents the method and process of the real-time error compensation (RTEC) on NC machine tools, which includes: identification and measurement of error components, separating and modeling of geometric-thermal error components, geometric-thermal volumetric error synthesis model, compensation control system, performance evaluation of error compensation by the body diagonal displacement measurement, and the industry application of real-time error compensation. The technique has been successfully applied to many different NC machine tools in the plants for practical production, and the machining accuracy of the NC machine tools is improved by an order of magnitude with low cost.

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Iñigo, Beñat, Ander Ibabe, Gorka Aguirre, Harkaitz Urreta und Luis Norberto López de Lacalle. „Analysis of Laser Tracker-Based Volumetric Error Mapping Strategies for Large Machine Tools“. Metals 9, Nr. 7 (05.07.2019): 757. http://dx.doi.org/10.3390/met9070757.

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The measurement and compensation of volumetric error in milling machines of medium and large size is a key aspect to meeting the precision requirements of the most demanding applications. There are several solutions for volumetric error measurement—usually based on laser or in calibrated artifacts—that offer different specifications and lead to a variety of levels of precision, complexity of implementation and automation, cost of equipment, and measurement time, amongst others. Therefore, it is essential to have tools that allow, in each case, analysis as to which is the optimal calibration strategy, providing the criteria for evaluating different measurement equipment and strategies. To respond to this need, several tools have been developed which are able to simulate the entire calibration and compensation process (machine, measurement, model adjustment, etc.) and apply optimization methods to find the best measurement strategy for each application. For a given machine architecture and expected error ranges, the compensation error for each strategy is obtained by propagating measurement uncertainties and expected machine errors through the measurement and compensation model fitting process by Monte Carlo simulations. The use of this tool will be demonstrated through the analysis of the influence of the main design parameters of a measurement strategy for the calibration of a 3-axis machine tool, based on the measurement of tool position with a laser tracker.

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Osiński, Piotr, Michał Stosiak, Paweł Bury, Rafał Cieślicki, Krzysztof Towarnicki und Piotr Antoniak. „Development tendencies of clearance compensation methods in internal gear pumps“. MATEC Web of Conferences 338 (2021): 01021. http://dx.doi.org/10.1051/matecconf/202133801021.

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Contemporary gear pumps, although their design has been under development for over four centuries, keep being modernized and improved. The work presents an analysis of design solutions, taking into account their operational features. The analysis included units with internal mesh. Emphasis was put on the problem of ensuring high values of volumetric efficiency by minimizing leakage in the widest possible range of loads while maintaining the highest possible hydraulic and mechanical efficiency of the displacement unit. Increasing the volumetric efficiency of positive displacement pumps is an important factor in the pursuit of increase in working pressures in hydrostatic systems. An important factor in production of pumps is cost of their production, which often leads to possibility of introducing additional modifications in the pump structure. Often changes made to the materials used in construction of pumps, allow reduction in their mass or sensitivity to the action of the transported liquid. The paper indicates the developed and proprietary solutions in this area and presents the results of experimental research.

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Zhang, Hu. „SOFTWARE COMPENSATION TECHNIQUE OF THE VOLUMETRIC ERRORS OF CNC MACHINING CENTERS“. Chinese Journal of Mechanical Engineering 37, Nr. 11 (2001): 58. http://dx.doi.org/10.3901/jme.2001.11.058.

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28

Baum, Christoph, Christian Brecher, Michel Klatte, Tae Hun Lee und Filippos Tzanetos. „Thermally induced volumetric error compensation by means of integral deformation sensors“. Procedia CIRP 72 (2018): 1148–53. http://dx.doi.org/10.1016/j.procir.2018.03.045.

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29

Aguado, Sergio, David Samper, Jorge Santolaria und Juan José Aguilar. „Machine Tool Rotary Axis Compensation Trough Volumetric Verification Using Laser Tracker“. Procedia Engineering 63 (2013): 582–90. http://dx.doi.org/10.1016/j.proeng.2013.08.189.

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30

Li, Jie, Bin Mei, Chaolin Shuai, Xin-jun Liu und Dawei Liu. „A volumetric positioning error compensation method for five-axis machine tools“. International Journal of Advanced Manufacturing Technology 103, Nr. 9-12 (14.05.2019): 3979–89. http://dx.doi.org/10.1007/s00170-019-03745-8.

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31

Xiang, Sitong, und Yusuf Altintas. „Modeling and compensation of volumetric errors for five-axis machine tools“. International Journal of Machine Tools and Manufacture 101 (Februar 2016): 65–78. http://dx.doi.org/10.1016/j.ijmachtools.2015.11.006.

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32

Ouafi, Abderrazak El, und Noureddine Barka. „Accuracy Enhancement of CNC Multi-Axis Machine Tools through an On-Line Error Identification and Compensation Strategy“. Advanced Materials Research 718-720 (Juli 2013): 1388–93. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.1388.

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In order to improve multi-axis machine accuracy, error compensation techniques have been widely applied. However, the lack of reliable methods for direct, global and comprehensive estimation implies that all compensation techniques are based on off-line sequential error components measurement. These measurements provide static results, and cannot reflect the actual machine conditions. Thus, these results are not representative of the real working conditions because of disturbances from thermal distortions and dynamic perturbations. This paper presents an on-line error identification and compensation approach for CNC multi-axis machine tools. Based on the simultaneous measurement of error components, the proposed identification scheme is built to ensure volumetric error prediction for an adaptive error compensation system. Implemented on a moving bridge type CMM, the approach led to a significant improvement of the three-dimensional measurement accuracy.Compared to the conventional off-line error compensation techniques, the proposed identification and compensation approach can further improve the compensation adaptability and efficiency.

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Lin, Zi-Jing, Haijing Niu, Lin Li und Hanli Liu. „Volumetric Diffuse Optical Tomography for Small Animals Using a CCD-Camera-Based Imaging System“. International Journal of Optics 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/276367.

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We report the feasibility of three-dimensional (3D) volumetric diffuse optical tomography for small animal imaging by using a CCD-camera-based imaging system with a newly developed depth compensation algorithm (DCA). Our computer simulations and laboratory phantom studies have demonstrated that the combination of a CCD camera and DCA can significantly improve the accuracy in depth localization and lead to reconstruction of 3D volumetric images. This approach may present great interests for noninvasive 3D localization of an anomaly hidden in tissue, such as a tumor or a stroke lesion, for preclinical small animal models.

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Simpson, M., und I. A. Gorlach. „A Kinematic Model for Volumetric Error Estimation of a Special Purpose CNC Machine“. Applied Mechanics and Materials 232 (November 2012): 367–71. http://dx.doi.org/10.4028/www.scientific.net/amm.232.367.

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This research reports on error identification and compensation of a special purpose CNC machine. The kinematic model of the machine was developed using rigid body kinematics and small angle approximation of the axes of the machine through homogenous transform matrices, and the equations describing the volumetric errors. The machine was calibrated to measure the axes errors, which were used in the kinematic model in order to determine compensation values. The model was evaluated by means of direct measurements of axis movements using a laser interferometer, as well as in cutting tests, where a large number of holes were drilled in plates and measured with a CMM. The results showed that the developed model achieved an average error reduction of 40%, for the X and Y axes.

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Chen, J. S., J. X. Yuan, J. Ni und S. M. Wu. „Real-time Compensation for Time-variant Volumetric Errors on a Machining Center“. Journal of Engineering for Industry 115, Nr. 4 (01.11.1993): 472–79. http://dx.doi.org/10.1115/1.2901792.

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An error compensation system has been developed to enhance the time-variant volumetric accuracy of a 3-axis machining center by correcting the existing machine errors through sensing, metrology, and computer control techniques. A general methodology has been developed to synthesize both the geometric and thermal errors of machines into a time-variant volumetric error model. Instead of the well-known 21 geometric error components, 32 machine linkage errors are formulated as a 4D error field including the space domain and the time domain. Different types of models are proposed for different kinds of thermal error components. A compensation controller based on an IBM/PC has been linked with a CNC controller to compensate for machine errors in real time. This scheme has been implemented on a horizontal machining center and has been shown, using metrology instruments, to improve the machine accuracy by an order of magnitude. A cut workpiece inspected using a coordinate measuring machine (CMM) has also shown that dimension errors have been reduced from 92.4 μm to 18.9 μm in a dimension of 404 × 310 mm2 and the depth difference of milled surfaces has been reduced from 196 μm to 8 μm.

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GUO, Qianjian. „Research on Volumetric Error Compensation of Two Turntable Five-axis Machine Tools“. Journal of Mechanical Engineering 52, Nr. 13 (2016): 189. http://dx.doi.org/10.3901/jme.2016.13.189.

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37

Wang, Wei Chen, und Hai Xia Gu. „Direct Slicing of CAD Model and Volumetric Error Compensation in Rapid Prototyping“. Advanced Materials Research 317-319 (August 2011): 1598–602. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.1598.

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Aiming at the disadvantage of slicing STL model in rapid prototyping, a method of slicing CAD model directly is proposed to advoid the precision damage during converting CAD model to STL file. The effect of the staircase error to the part surface is analyzed, and an algorithm of compensating the section contour is proposed to eliminate the layers’ volumetric difference and improve the part surface precision. The test shows that the methods can obtain the accurate sections of CAD model and improve the part’s shape and size precision.

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Xiang, Sitong, Jianguo Yang, Kaiguo Fan und Hongxing Lu. „Multi-machine tools volumetric error generalized modeling and Ethernet-based compensation technique“. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 230, Nr. 5 (06.02.2015): 870–82. http://dx.doi.org/10.1177/0954405414564407.

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39

Aguado, S., D. Samper, J. Santolaria und J. J. Aguilar. „Towards an effective identification strategy in volumetric error compensation of machine tools“. Measurement Science and Technology 23, Nr. 6 (04.05.2012): 065003. http://dx.doi.org/10.1088/0957-0233/23/6/065003.

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40

Zha, Jun, Tao Wang, Linhui Li und Yaolong Chen. „Volumetric error compensation of machine tool using laser tracer and machining verification“. International Journal of Advanced Manufacturing Technology 108, Nr. 7-8 (Juni 2020): 2467–81. http://dx.doi.org/10.1007/s00170-020-05556-8.

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41

Wan, An, Libin Song, Jing Xu, Shaoli Liu und Ken Chen. „Calibration and compensation of machine tool volumetric error using a laser tracker“. International Journal of Machine Tools and Manufacture 124 (Januar 2018): 126–33. http://dx.doi.org/10.1016/j.ijmachtools.2017.10.004.

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42

Wang, Shih-Ming, und Ji-Jun Lin. „On-machine volumetric-error measurement and compensation methods for micro machine tools“. International Journal of Precision Engineering and Manufacturing 14, Nr. 6 (Juni 2013): 989–94. http://dx.doi.org/10.1007/s12541-013-0131-x.

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43

Jamuna, R., und U. Natarajan. „Thermal Error Modelling in CNC Machines“. Applied Mechanics and Materials 592-594 (Juli 2014): 1815–19. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.1815.

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Latest trend in increasing the performance characteristics of precision machines is reducing error in machines. Today research is focused on Machine tool accuracy. The effect of thermal error contributes to major part of 70% of volumetric error. The present study aims to establish a new compensation method for CNC Turning centre. Selection of proper temperature variables is a great task in thermal error compensation. In this paper 3 thermal process variables namely spindle speed; temperature and time are used to create thermal error models. Using ANSYS simulation experiments are created.

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Jin, Sang Y., Ki-Taek Lee und Kyuil Kim. „Volumetric Error Compensation of Multi-Axis Laser Machining Center for Direct Patterning of Flat Panel Display“. Journal of Manufacturing Science and Engineering 128, Nr. 1 (07.04.2005): 239–48. http://dx.doi.org/10.1115/1.2118787.

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A new direct laser patterning system for improving the quality of the pattern on the glass substrate of large Flat Panel Displays (FPD) was developed, which consists of the laser machining center, the laser measurement system, and the adaptive rotational mirror system. The new system is distinguished from the existing system by its control mechanism which compensates for the laser beam error caused by the volumetric error of the multi-axis machine. The new system, in comparison with existing systems which control each stage of multi-axis, uses a fast steering mirror (FSM) and adaptive laser optics to compensate for the error of the laser beam on the substrate. Through this study, a mathematical model of the volumetric error of the multi-axis laser machining center was developed to quantify the geometric and the kinematic errors of each machine axis and their contributing effect on the substrate. The information contained in the mathematical model was expressed in a volumetric error matrix. Further, a mathematical model of the beam delivery was developed to measure the beam delivery on the substrate and its effect on the quality of the patterning. The patterning errors were corrected by using an FSM, which has two rotational angles. The viability of the proposed scheme was demonstrated through simulations and experiments.

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Wang, Shih-Ming, Han-Jen Yu und Hung-Wei Liao. „STUDY OF A NEW AND LOW-COST MEASUREMENT METHOD OF VOLUMETRIC ERRORS FOR CNC FIVE-AXIS MACHINE TOOLS“. Transactions of the Canadian Society for Mechanical Engineering 37, Nr. 3 (September 2013): 829–40. http://dx.doi.org/10.1139/tcsme-2013-0070.

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An effective and inexpensive volumetric error measurement method is an essential of the software-based error compensation method that can improve the machining accuracy of a CNC machine tool without increasing hardware manufacturing cost. In this paper, a new volumetric-error measurement method incorporating of three derived error models, two-step measurement procedure, and use of telescoping ball-bar was proposed for three major types of five-axis machine tools. Comparing to the methods currently used in industry, the proposed method provides the advantages of low cost, easy setup, and high efficiency. The simulation and experimental results have shown the feasibility and effectiveness of the method.

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Kursov, S. V., O. V. Biletskyy, K. I. Lyzogub, A. O. Khmyzov und M. G. Klebek. „Problems in intraoperative blood loss compensation: strategies of volumetric hemodynamic support (analytical review)“. EMERGENCY MEDICINE, Nr. 2.81 (15.05.2017): 28–38. http://dx.doi.org/10.22141/2224-0586.2.81.2017.99689.

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47

IHARA, Yukitoshi, Masaomi TSUTSUMI, Toru EGUCHI und Soichi IBARAKI. „Measurement of Volumetric Accuracy of 5-Axis Machine Tool and Investigation Compensation Technology“. Journal of the Japan Society for Precision Engineering 85, Nr. 10 (05.10.2019): 809–12. http://dx.doi.org/10.2493/jjspe.85.809.

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48

Tian, H., C. Gao, Z. T. Gao und Y. D. Zhao. „Study on influence and compensation for soil compactness on volumetric water content measurement“. IOP Conference Series: Earth and Environmental Science 346 (14.10.2019): 012033. http://dx.doi.org/10.1088/1755-1315/346/1/012033.

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49

Li, Jie, Bin Mei, Chaolin Shuai, Xin-jun Liu und Dawei Liu. „Correction to: A volumetric positioning error compensation method for five-axis machine tools“. International Journal of Advanced Manufacturing Technology 103, Nr. 9-12 (17.06.2019): 3991. http://dx.doi.org/10.1007/s00170-019-03974-x.

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50

Givi, Mehrdad, und J. R. R. Mayer. „Optimized volumetric error compensation for five-axis machine tools considering relevance and compensability“. CIRP Journal of Manufacturing Science and Technology 12 (Januar 2016): 44–55. http://dx.doi.org/10.1016/j.cirpj.2015.09.002.

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