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Journal articles on the topic 'Geometric accuracy of the machine'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Holub, Michal, and Jiri Rosenfeld. "Geometric Accuracy of Large Machine Tools." Acta Mechanica Slovaca 24, no. 3 (2020): 56–62. http://dx.doi.org/10.21496/ams.2020.036.

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2

Berus, Lucijano, Jernej Hernavs, David Potocnik, Kristijan Sket, and Mirko Ficko. "Enhancing Manufacturing Precision: Leveraging Motor Currents Data of Computer Numerical Control Machines for Geometrical Accuracy Prediction Through Machine Learning." Sensors 25, no. 1 (2024): 169. https://doi.org/10.3390/s25010169.

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Direct verification of the geometric accuracy of machined parts cannot be performed simultaneously with active machining operations, as it usually requires subsequent inspection with measuring devices such as coordinate measuring machines (CMMs) or optical 3D scanners. This sequential approach increases production time and costs. In this study, we propose a novel indirect measurement method that utilizes motor current data from the controller of a Computer Numerical Control (CNC) machine in combination with machine learning algorithms to predict the geometric accuracy of machined parts in real

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Wang, Lina, Xingxing Liu, Wenjie Tian, and Dawei Zhang. "Geometric Accuracy Design and Tolerance Allocation of Precision Horizontal Machining Centers." Machines 13, no. 3 (2025): 187. https://doi.org/10.3390/machines13030187.

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As the structural complexity of machined components increases and the pace of product updates accelerates, the demands for machining precision in CNC machine tools are becoming increasingly rigorous. Consequently, the continuous enhancement of machining accuracy in machine tools presents a significant challenge that must be addressed within the realms of machine tool innovation and the development of manufacturing equipment. This paper conducts a comprehensive investigation into the tolerance optimization allocation method for geometric accuracy in precision horizontal machining centers utiliz

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4

Li, Saichen, Huimin Kang, Zelong Li, et al. "Development of a Large-Aperture Coordinate Precision Measurement Instrument Using Differential Geometric Error Weighting." Applied Sciences 14, no. 22 (2024): 10125. http://dx.doi.org/10.3390/app142210125.

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The accuracy of traditional measuring machines is affected by the measuring range and sensitive geometric errors, and it is not possible to combine large caliber and high-precision measurements. This study proposes a differential geometric error-weighting method for designing a high-precision, large-diameter measuring machine. The machine utilized a zero-Abbe arm structure and applied the rigid body theory and small-angle hypothesis to model geometric errors. Weights were calculated for 23 geometric errors, identifying eight sensitive ones. A picometer-precision laser interferometer (quDIS) wi

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IBARAKI, Soichi. "How Accurate is the Motion? : Geometric Accuracy Measurement for Machine Tools." Journal of the Society of Mechanical Engineers 118, no. 1164 (2015): 672–75. http://dx.doi.org/10.1299/jsmemag.118.1164_672.

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Morimoto, Yoshitaka, Keisuke Nakato, and Motoshi Gontani. "Accuracy Evaluation of 5-Axis Machining Center Based on Measurements of Machined Workpiece – Evaluation of Accuracy of 5-Axis Controlled Machining Center –." International Journal of Automation Technology 6, no. 5 (2012): 675–81. http://dx.doi.org/10.20965/ijat.2012.p0675.

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A new method for evaluating the geometrical accuracy of a 5-axis Machining Center (MC) based on the measurement results of the machined workpiece has been developed. The strategy behind our method is to utilize, because of its accuracy, a Coordinates Measuring Machine (CMM) as a master gauge. Thus, the machine operator machines the workpiece and a technologist of precise measurement takes the measurements. In our study, non-rotational machining is utilized to copy and trace the machine trajectory on the workpiece, minimizing the machining error. The profiles of the machined workpiece are measu

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Cheng, Qiang, Hongwei Zhao, Zhifeng Liu, Cui Zhang, and Peihua Gu. "Robust geometric accuracy allocation of machine tools to minimize manufacturing costs and quality loss." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 15 (2016): 2728–44. http://dx.doi.org/10.1177/0954406215600398.

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With increasing demands of machining accuracy, designing of machine tools for satisfactory performance using cost-effective geometric accuracy configurations is becoming a complex problem to the machine tool manufacturers. In this paper, a novel robust accuracy allocation method is proposed for multi-axis machine tools based on multi-objective quality and cost trade-offs. To model the volumetric accuracy of machine tool based on geometric errors, the multi-body system theory was introduced. A manufacturing cost model for the machine tool components with a significant effect on geometric errors

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8

Hoang, Trung Kien, and Nguyen Minh Duc Ta. "Machining Based Geometric Error Estimation Method for 3-Axis CNC Machine." Applied Mechanics and Materials 889 (March 2019): 469–74. http://dx.doi.org/10.4028/www.scientific.net/amm.889.469.

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Computer numerical control (CNC) machine tool plays an extremely significant role in any manufacturing industry due to its automation and high accuracy. Keeping the CNC machine tool at its highest performance to meet the demand of high accuracy machining is always significant. To maintain the accuracy of a machine tool over the time, it is important to measure and compensate the geometric error, one of the main error source of machine tool, especially when the machine get old. There are totally 21 geometrical errors in a 3-axis machine tool including three translational errors and three rotati

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9

Yang, Lin, Jin Yuan Wang, Rui Nan Wu, and Wei Wu. "Machine Slideway Wear to the Precision of the Whole Machine Impact." Applied Mechanics and Materials 229-231 (November 2012): 2474–77. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.2474.

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This paper studies the influence of machine slideway precision on the overall accuracy of machine tools, and puts forward the root causes of the decline in accuracy of machine tool guide is rail wear, the decline of rail accuracy will impact on the adjacent unit cell, thus decline the accuracy of the machined parts; Finally takes floor-type milling & boring machine as research object, bases on geometric error models of the theory of multi-body system to describe the spindle box rail wear trends and establish relationship between the spindle box rail wear and the machine precision.

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10

Li, Dianxin, Pingfa Feng, Jianfu Zhang, Dingwen Yu, and Zhijun Wu. "An identification method for key geometric errors of machine tool based on matrix differential and experimental test." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 17 (2014): 3141–55. http://dx.doi.org/10.1177/0954406214527272.

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This paper presents a key geometric errors identification method for machine tools based on matrix differential and experimental test. An error model for a machine tool was established by regarding the three-axis machining center as a multi-body system. The sensitivity coefficients of the machining error with respect to the geometric errors were determined using the matrix differential method, and the degree of influence of the geometric errors on the machining accuracy under ideal conditions was discussed. Using the 12-line method, 21 geometric errors of the machine tool were identified, allo

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11

Jiang, Chuang, Huiliang Wang, Tianhao Han, and Xing Liu. "Simulation and Compensation of Axial Geometric Errors for Cycloidal Gears Based on Form Grinding." Mathematical Problems in Engineering 2022 (April 21, 2022): 1–16. http://dx.doi.org/10.1155/2022/4804498.

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To increase quality, reduce cycloidal gear noise, and avoid unnecessary vibration and shock, a compensation of axial geometric errors method is proposed based on the cycloidal gear form grinding. In the process of machining cycloidal gears, the relative position relationship between the grinding wheel and workpiece is affected by geometric errors of the motion axes, which has serious effects on the surface accuracy of the cycloidal gears. Combined with cycloidal gear form grinding kinematic principles, a geometric error model for each axis of a four-axis computer numerical control form grindin

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12

Cheng, Qiang, Dong Sheng Xuan, Jie Sun, and Zhi Feng Liu. "Geometric Errors Sensitivity Analysis of Precision Vertical Machining Center Based on Multi-Body System Theory." Applied Mechanics and Materials 108 (October 2011): 61–66. http://dx.doi.org/10.4028/www.scientific.net/amm.108.61.

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Parts of geometric error coupled into space error is the main reason that affects machining accuracy of machine tools; therefore, how to determine the effect of geometric error to the machining accuracy and then assigning geometry precision of parts economically is a difficult problem in machine tool designing process. Therefore, based on multi-body system theory, a sensitivity analysis method of geometric error is put forward in this paper. Let’s take precision vertical machining center for an example. Firstly, an accuracy model of machining center is established based on multi-body system th

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Wang, Wei Qing, and Huan Qin Wu. "Sensitivity Analysis of Geometric Errors for Five-Axis CNC Machine Tool Based on Multi-Body System Theory." Applied Mechanics and Materials 271-272 (December 2012): 493–97. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.493.

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Abstract: In order to determine that the effect of geometric error to the machining accuracy is an important premise for the error compensation, a sensitivity analysis method of geometric error is presented based on multi-body system theory in this paper. An accuracy model of five-axis machine tool is established based on multi-body system theory, and with 37 geometric errors obtained through experimental verification, key error sources affecting the machining accuracy are finally identified by sensitivity analysis. The analysis result shows that the presented method can identify the important

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14

Cheng, Qiang, Hong Wei Zhao, Li Gang Cai, and Pei Hua Gu. "Influence Analysis of Machine Tool’s Turntable Angle Errors to the Roundness of Machined Hole." Applied Mechanics and Materials 496-500 (January 2014): 816–22. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.816.

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Machining accuracy has always been a key problem to machine tool. Machine errors are caused by a variety of error factors among which the geometric error is a key element. An accuracy model of the 3-axis CNC machine tool is established in this paper with multi-body system (MBS).And based on the accuracy model, the mathematical model of roundness error also built up. At last, the influence of CNC machine tools turntable angle error to roundness error of machined hole is analyzed.

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Moravčíková, Jana, and Peter Pokorný. "Design of Complex Component for Determination of a CNC Milling Machines Accuracy." Key Engineering Materials 703 (August 2016): 22–26. http://dx.doi.org/10.4028/www.scientific.net/kem.703.22.

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The article is focused on the design of complex component to determine competence CNC milling machines designed to produce shapes with geometric tolerances by observing the shape, orientation and position of the standard EN ISO 1101. 3D model of a technological process for the production of complex components, it will contain the complete design of tools and cutting parameters for individual milling strategy, select clamping and workpiece material, a preview of the generated routing strategies and paths cut surface after each of their simulated. For milling machines with the so-called measurem

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16

Fu, Hong Ya, Han Wang, and Zhen Yu Han. "Modeling and Analysis of Key Geometric Error for Gravity Deformation of Heavy-Duty CNC Machine Tool." Applied Mechanics and Materials 552 (June 2014): 90–95. http://dx.doi.org/10.4028/www.scientific.net/amm.552.90.

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Gravity has huge impact on the accuracy of heavy-duty machine tools. To investigate errors caused by gravity, it is essential to figure out the most influential factor. This paper presents a geometric error modeling for heavy-duty CNC machine tools. Regarding a machine tool as a rigid multi-body system (MBS), the geometric error model has been established by utilizing kinematics chain and homogeneous transfer matrix (HTM). By analyzing the Jacobi matrix, the influence of all the geometric error parameters has been calculated to find out the key geometric error that affect the accuracy most. It

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17

Guo, Shijie, Shufeng Tang, and Dongsheng Zhang. "A Recognition Methodology for the Key Geometric Errors of a Multi-Axis Machine Tool Based on Accuracy Retentivity Analysis." Complexity 2019 (November 22, 2019): 1–21. http://dx.doi.org/10.1155/2019/8649496.

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This paper proposes a recognition methodology for key geometric errors using the feature extraction method and accuracy retentivity analysis and presents the approach of optimization compensation of the geometric error of a multiaxis machine tool. The universal kinematics relations of the multiaxis machine tool are first modelled mathematically based on screw theory. Then, the retentivity of geometric accuracy with respect to the geometric error is defined based on the mapping between the constitutive geometric errors and the time domain. The results show that the variation in the spatial erro

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18

Liu, Xiaojian, Yang Wang, Lemiao Qiu, Chenrui Wu, Peng Zhang, and Shuyou Zhang. "An improved geometric error analysis method considering the variety of sensitivities over working space." Advances in Mechanical Engineering 10, no. 8 (2018): 168781401879238. http://dx.doi.org/10.1177/1687814018792389.

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Machine tool accuracy analysis has become increasingly important since accuracy as the major parameter of a machine is to a large extent determined by geometric accuracy design. In order to improve the comprehensiveness and veracity of geometric accuracy design, this article proposes an improved geometric error analysis method considering the variety of sensitivities over working space. A multi-rigid-body model which includes cutting tool’s wear-out error and workpiece’s clamping error is established to represent the position relationship of machine tool’s working components. The expression of

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19

Derbaba, V., V. Nosachov, and Z. Rizo. "Research and improvement of methods of testing machines for geometric and kinematic accuracy." Collection of Research Papers of the National Mining University 64 (2021): 198–212. http://dx.doi.org/10.33271/crpnmu/64.198.

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Purpose. To analyze and check for adequacy the known calculation formulas in determining the geometric and kinematic accuracy, statistical and dynamic rigidity and testing the machine for technological reliability. To carry out comparative calculations to simplify the methodology of complex tests of metal-cutting machines of the universal group. To select and improve the measuring equipment during the complex tests of the milling machine. Methodology. The research is based on the use of analytical methods for calculating the static rigidity coefficient, additional calculation of the measuring

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20

Lin, Zixin, Wenjie Tian, Dawei Zhang, Weiguo Gao, and Lina Wang. "A mapping model between the workpiece geometric tolerance and the end pose error of CNC machine tool considering structure distortion of cutting process system." Advances in Mechanical Engineering 13, no. 3 (2021): 168781402110047. http://dx.doi.org/10.1177/16878140211004771.

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Aiming at the problem that the geometric accuracy design index of machine tools is difficult to be determined reasonably in the geometric precision design process of CNC machine tools, this paper presents a mapping model between geometric tolerance of the workpiece and end pose error (positional and orientational error of the tool relative to the workpiece) of the machine tool considering structure distortion of cutting process system. Only considering the factors of the machine tool geometric errors, this paper first establishes the relationship between the geometric tolerance requirements of

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21

Jauhari, Khairul, and Mahfudz Al Huda. "The Geometric Accuracy of Complex Surface Using 5-Axis Turn-mill Machine." Jurnal Keteknikan Pertanian Tropis dan Biosistem 8, no. 3 (2020): 253–62. http://dx.doi.org/10.21776/ub.jkptb.2020.008.03.07.

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This paper presents an analysis model for geometric accuracy measurement of marine propeller blades. Geometric accuracy of marine propeller models, which has been finished by machining processes are measured and analyzed using GOM 3D photo-scanning peripheral and software. The methods we used are firstly, marine propeller blades are scanned by GOM Scanner and then the effects of cutting parameters, that is step-over variation on the geometric accuracy are investigated. Inspection of geometric accuracy is performed by comparing the result of 3D scanning measurement of finished propeller with CA

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22

Hayashi, Akio, Hiroto Tanaka, Masato Ueki, Hidetaka Yamaoka, Nobuaki Fujiki, and Yoshitaka Morimoto. "Forward Kinematics Model for Evaluation of Machining Performance of Robot Type Machine Tool." International Journal of Automation Technology 15, no. 2 (2021): 215–23. http://dx.doi.org/10.20965/ijat.2021.p0215.

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Robot-type machine tools are characterized by the ability to change the tool posture and machine itself with a wider motion range than conventional machine tools. The motion of the robot machine tool is realized by simultaneous multi-axis control of link mechanisms. However, when the robot machine tool performs a general milling process, some problems that affect the machining accuracy occur. Moreover, it is difficult to identify the motion errors of each axis, which influence machining accuracy. Thus, it is difficult to adjust the servo gain and alignment error. In addition, the machining per

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23

Li, Pengzhong, Ruihan Zhao, and Liang Luo. "A Geometric Accuracy Error Analysis Method for Turn-Milling Combined NC Machine Tool." Symmetry 12, no. 10 (2020): 1622. http://dx.doi.org/10.3390/sym12101622.

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Turn-Milling Combined NC machine tool is different from traditional machine tools in structure and process realization. As an important means in the design stage, the analysis method of geometric accuracy error is also different from the traditional method. The actual errors and the error compensation values are a pair of "symmetry" data sets which are connected by the movement of machine tools. The authors try to make them more consistent through this work. The geometric error terms were firstly determined by topological structure analysis, then based on homogeneous coordinate transformation

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Grigoriev, Sergey N., Dmitriy A. Masterenko, Yaroslav I. Pimushkin, and Mikhail M. Stebulyanin. "Increasing the location accuracy of the operating unit of a three-axis metal-cutting machine tool: application of the differential geometric model of volumetric errors." Izmeritel`naya Tekhnika, no. 11 (January 9, 2025): 4–13. https://doi.org/10.32446/0368-1025it.2024-11-4-13.

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The article is devoted to increasing the volumetric accuracy of multi-axis machine tools. Based on the model of measurement and calculation of the volumetric geometric error of machine tools presented by the authors, a method has been developed which allows to signifi cantly improve the accuracy of the movement of the operating unit of a three-axis metal-cutting machine tool to a given point. The astatic law and the calculation of the coordinate correction according to the differential geometric model of the volumetric error are used to control the movement of the operating unit. The developed

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Li, Zihan, Wenlong Feng, Jianguo Yang, and Yiqiao Huang. "An investigation on modeling and compensation of synthetic geometric errors on large machine tools based on moving least squares method." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 232, no. 3 (2016): 412–27. http://dx.doi.org/10.1177/0954405416645985.

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This article intends to provide an efficient modeling and compensation method for the synthetic geometric errors of large machine tools. Analytical and experimental examinations were carried out on a large gantry-type machine tool to study the spatial geometric error distribution within the machine workspace. The result shows that the position accuracy of the tool-tip is affected by all the translational axes synchronously, and the position error curve shape is non-linear and irregular. Moreover, the angular error combined with Abbe’s offset during the motion of a translational axis would caus

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Cheng, Qiang, Lifang Dong, Zhifeng Liu, Jiaying Li, and Peihua Gu. "A new geometric error budget method of multi-axis machine tool based on improved value analysis." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 22 (2018): 4064–83. http://dx.doi.org/10.1177/0954406217749269.

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The improvement of the accuracy grade of main components in the production process through balancing between function and cost helps to improve the overall accuracy of machine tools. Therefore, this paper presents an improved value analysis method and uses the method of global sensitivity analysis and geometric error correlation analysis to analyze and optimize the error parameters of a 4-axis machining tool based on the proposed method. The geometric error modeling of the 4-axis machine tool was established by using the homogeneous transformation matrices (HTMs). By using global sensitivity a

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27

Anikeeva, Olesya, Alexander Ivakhnenko, and Oleg Erenkov. "Approaches to nonlinear theory creation for machine tools geometric accuracy." MATEC Web of Conferences 224 (2018): 01037. http://dx.doi.org/10.1051/matecconf/201822401037.

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The justification of the nonlinear theory creation in machines geometrical accuracy field is given in the work. The problems accountings of which don’t allow providing the consecutive linearization method adequacy at geometrical accuracy calculating of metal-cutting machines are considered. The potential sources of not linearities at calculating of metal-cutting systems accuracy and the sources of the nonlinear members appearance are revealed. At the same time the nonlinear members are considering the machines geometrical errors at a shaping function variation. The full variation of shaping fu

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28

Zou, Xicong, Xuesen Zhao, Zongwei Wang, Guo Li, Zhenjiang Hu, and Tao Sun. "Error Distribution of a 5-Axis Measuring Machine Based on Sensitivity Analysis of Geometric Errors." Mathematical Problems in Engineering 2020 (February 14, 2020): 1–15. http://dx.doi.org/10.1155/2020/8146975.

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Geometric errors are inevitably introduced into any multiaxis measuring system, and the geometric error is one of the main factors that seriously affects the measurement accuracy. The present work investigates the error distribution of the prototype of a 5-axis measuring machine based on sensitivity analysis of geometric errors. The measurement error modeling of the 5-axis measuring machine is first established via the homogeneous coordinate transformation, and the Sobol global sensitivity analysis method is then employed to quantify the influence of geometric errors on the measurement result

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29

KIKKAWA, Koichi, Masaki HIROSAWA, Hidekazu KIKUCHI, Yoshio MIZUGAKI, and Hisanobu TERAI. "3362 Dependency of Working Accuracy on Location of Truncated Conical Workpiece Machined by 5-axis Controlled Machine Tool with Geometric Error." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2011.6 (2011): _3362–1_—_3362–4_. http://dx.doi.org/10.1299/jsmelem.2011.6._3362-1_.

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30

Zheng, Fajia, Bin Zhang, Yuqiong Zhao, Jiakun Li, Fei Long, and Qibo Feng. "Efficient Method for Identifying Key Errors Based on 21-Geometric-Error Measurement of Three Linear Axes of Machine Tools." Applied Sciences 14, no. 7 (2024): 2982. http://dx.doi.org/10.3390/app14072982.

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Key errors of machine tools have a significant impact on their accuracy, however accurately and quickly measuring the geometric errors of machine tools is essential for key error identification. Fortunately, a quick and direct laser measurement method and system for 21 geometric errors of three linear axes of machine tools were proposed previously, which enables the measurement of all 21 geometric errors via a one-step installation and a three-step automated measurement process. Based on this, to efficiently identify the key error factors, this paper first utilizes the 21 geometric errors obta

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31

Czerech, Łukasz. "SELECTION OF OPTIMAL MACHINING STRATEGY IN THE MANUFACTURE OF ELEMENTS BOUNDED BY CURVILINEAR SURFACES." Acta Mechanica et Automatica 7, no. 1 (2013): 5–10. http://dx.doi.org/10.2478/ama-2013-0001.

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Abstract Increasing machining accuracy realized on CNC machine tools causes that the more frequently surfaces machined with this technique are not subject to further finishing processing and directly affects on the final quality of the product. Achieving geometric accuracy established by the constructor is the problem that modern technologists and CAD/CAM programmers have to faced with. The paper presents the influence of toolpath tolerance and machining strategy available in CAD/CAM software on the constituting process of technological surface layer for elements limited with curvilinear surfa

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32

Ratajczyk, Eugeniusz. "New types of coordinate measuring machines and symbols used for their parameters. Part II: Examples of gantry machines." Mechanik 90, no. 5-6 (2017): 462–67. http://dx.doi.org/10.17814/mechanik.2017.5-6.61.

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Gantry type coordinate measuring machines belong to a group of machines operating to the highest accuracy standards and they are most commonly used for geometric measurements of machine elements, especially in automotive industry. Description of characteristics and functions of the machines offered by different manufacturers is presented.

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Han, Zhen Yu, Hong Yu Jin, Yu Long Liu, and Hong Ya Fu. "A Review of Geometric Error Modeling and Error Detection for CNC Machine Tool." Applied Mechanics and Materials 303-306 (February 2013): 627–31. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.627.

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Error compensation can improve the accuracy of machine tools effectively. Among the error sources affecting the accuracy of CNC machine tool, geometric error is always set as a key performance criterion. This paper summarizes several methods of geometric error modeling and reviews the characteristics of different methods. Furthermore, available methods for measuring geometric errors have been reviewed also based on the advanced instruments. This work aims at enhancing the efficiency of error detection and give a perspective for the application of error compensation in the future.

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Yang, Hongtao, Mei Shen, Li Li, Yu Zhang, Qun Ma, and Mengyao Zhang. "New identification method for computer numerical control geometric errors." Measurement and Control 54, no. 5-6 (2021): 1055–67. http://dx.doi.org/10.1177/00202940211010835.

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To address the problems of the low accuracy of geometric error identification and incomplete identification results of the linear axis detection of computer numerical control (CNC) machine tools, a new 21-item geometric error identification method based on double ball-bar measurement was proposed. The model between the double ball-bar reading and the geometric error term in each plane was obtained according to the three-plane arc trajectory measurement. The mathematical model of geometric error components of CNC machine tools is established, and the error fitting coefficients are solved throug

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35

Liu, Chun Lin. "The Analysis and Application of Machine Tool Spindle Self-Grinding Method." Advanced Materials Research 706-708 (June 2013): 1598–601. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.1598.

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The self-grinding method was adapted on the fine grinding machine spindle after the parts of machine tool were assembled, which was easy to guarantee the spindle datum plane geometric accuracy. The Self-grinding is a reliable and economical technology method. The turning accuracy of Machine Tool Spindle and grinding process system were analyzed to guarantee the grinding accuracy and cutting accuracy of the whole machine material.

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Harja, Herman Budi, Anisa Nurbaniah, Novi Saksono Brodjo Muhadi, and Andi Noviandi. "Straightness Geometric Error Assessment for CNC Milling Machine." Key Engineering Materials 939 (January 25, 2023): 39–46. http://dx.doi.org/10.4028/p-a8n75m.

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The straightness movement error of the machine tools axis contributes significantly to the straightness of the workpiece machining feature. This paper focuses on the assessment study of CNC machine tools’ straightness geometric error for obtaining recommendation information to improve machine geometric accuracy. A research method by determining measurement parameters according to ISO 230 procedure, no-load measurement of straightness vertical-horizontal geometric error using a laser interferometer, collecting data, data analysis. Data analysis calculates positional straightness deviation, mean

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Liu, Hongwei, and Rui Yang. "The modeling method of machine tool geometry error based on Bryan principle." Advances in Mechanical Engineering 15, no. 3 (2023): 168781322311629. http://dx.doi.org/10.1177/16878132231162983.

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The error caused by measurement itself directly affects the accuracy of models. The error caused by the failure to follow the Bryan principle in the process of measuring the volumetric error of the machine tool makes the geometric accuracy of the machine tool after compensation less than the ideal effect. In this paper, it is proposed that the measurement error will be caused by the non coincidence of the measurement point and the tool position point in the measurement of linear axis error. According to Bryan principle, the relationship between the center point of the reflective mirror of the

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Mir, Y. A., J. R. R. Mayer, and C. Fortin. "Tool path error prediction of a five-axis machine tool with geometric errors." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, no. 5 (2002): 697–712. http://dx.doi.org/10.1243/0954405021520391.

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Predicting the actual tool path of a machine tool prior to machining a part provides useful data in order to ensure or improve the dimensional accuracy of the part. The actual tool path can be estimated by accounting for the effect of the machine tool geometric error parameters. In computer aided design/computer aided manufacture (CAD/CAM) systems, the nominal tool path [or CL (cutter location) data] is directly generated from the curves and surfaces to be machined and the errors of the machine tool are not considered. In order to take these errors into consideration, they must first be identi

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Švéda, Jiří, Štěpán Chládek, Tomáš Hornych, Tomáš Kozlok, and Jan Smolík. "Increasing Machining Accuracy Based on CNC Machine Tool Correction Data by Using Ad Hoc Modification." Machines 10, no. 5 (2022): 288. http://dx.doi.org/10.3390/machines10050288.

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The geometric accuracy of a workpiece represents one of the key parameters defining its quality, and it is affected by the appropriate selection of the machine tool, control system, NC program and cutting conditions. Up-to-date control systems contain advanced compensation functions, which increase the volumetric accuracy of the machine tools. Nevertheless, these functions use correction data measurements within the machine tool’s periodic maintenance plan. This paper introduces a method for ad hoc correction data modification. This modification is based on the difference between the real and

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Liang, Gui Qiang, Jun Xian Zhang, and Fei Fei Zhao. "Geometric Error Modeling of a Vertical Machining Center." Advanced Materials Research 694-697 (May 2013): 1842–45. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.1842.

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The effect of geometric error on machining accuracy was researched by multi-body system theory, as well as homogeneous coordinate transformation method. Taking a vertical machining center as example, topological structure of the machine tool was described by lower body array. Lower body array of the machining center, motion freedom between adjacent bodies and geometric errors of the vertical machining center were analyzed. Geometric errors of the bodies in the multi-body system were expressed by homogeneous coordinate transformation. Error model for machining accuracy was deduced and geometric

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Zhu, Xian Qiu, Dong Gao, and Gang Wei Cui. "Geometric Error Detection and Identification of a Heavy NC Boring and Milling Machine Tool by Using Laser Tracker." Applied Mechanics and Materials 37-38 (November 2010): 505–8. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.505.

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It is inefficient and complicate to detect geometric errors of a heavy machine tool with large scale dimensions by using traditional laser interferometer. With the development of the laser tracker convenient for measuring large scale dimension, the accuracy of the laser tracker can meet the accuracy requirements for geometric error measurement of heavy machine tools. In this paper a method of using laser tracker for detecting and identifying the error of a heavy NC boring and milling machine tool is introduced. The measuring experiment demonstrates that this new method can improve the measurem

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Deng, Yu Fen, Jun Jie Guo, Jin Dong Wang, and Jun Feng Lu. "The Detection of NC Machine Geometric Accuracy Based on the Principle of Multiple-Time GPS." Advanced Materials Research 308-310 (August 2011): 531–37. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.531.

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This paper presents a measurement method of NC machine geometric accuracy. The principle is that a laser tracker is used to collect a lot of target point coordinates on four different locations around the machine during the machine spindle moving. A redundant equations could be established through target point coordinates,then the exact location of each target point coordinates could be determined by the principles of GPS positioning.Through the target point coordinates,the geometric error of machine could be separated. The method has fast measuring speed and low cost.Moreover the measurement

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Cheng, Qiang, Qiunan Feng, Zhifeng Liu, Peihua Gu, and Ligang Cai. "Fluctuation prediction of machining accuracy for multi-axis machine tool based on stochastic process theory." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 14 (2014): 2534–50. http://dx.doi.org/10.1177/0954406214562633.

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Geometric error has significant influence on the processing results and reduces machining accuracy. Machine tool geometric errors can be interpreted as a deterministic value with an uncertain fluctuation of probabilistic distribution. Although, the uncertain fluctuation can not be compensated, it has extremely profound significance on the precision and ultra-precision machining to reduce the fluctuation range of machining accuracy as far as possible. In this paper, a typical 3-axis machine tool with high precision is selected and the fluctuations in machining accuracy are studied. The volumetr

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Jian, Yi, Qian Qian Li, Hong Cheng, Bin Wu Lai, and Jian Fei Zhang. "Research on Geometric Error Compensating Technique of CNC P3G Grinding Machine." Advanced Materials Research 462 (February 2012): 287–94. http://dx.doi.org/10.4028/www.scientific.net/amr.462.287.

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Kinematic accuracy is a key reason which influence workpiece's geometric error precision on traditional working process of precisely CNC（Computerized Numerical Control）P3G（polygon profile with 3 lobes） grinding machine. A systematic geometric error model has been presented for CNC P3G grinding machine， proposed multi-body system theory integrate with the structure of CNC P3G grinding machine tools, researched on the machine's space geometric errors. By means of separate geometric errors from the machine tools, build geometric mathematical error model. Then, identify 21 error parameters through

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Wang, Liping, Mengyu Li, and Guang Yu. "A Novel Error Sensitivity Analysis Method for a Parallel Spindle Head." Robotics 12, no. 5 (2023): 129. http://dx.doi.org/10.3390/robotics12050129.

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Geometric errors are the main factors affecting the output accuracy of the parallel spindle head, and it is necessary to perform a sensitivity analysis to extract the critical geometric errors. The traditional sensitivity analysis method analyzes the output position and orientation errors independently, defining multiple sensitivity indices and making it difficult to determine critical geometric errors. In this paper, we propose sensitivity indices that can comprehensively consider position and orientation errors. First, the configuration of the hybrid machine tool is introduced, and the TCP p

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Zhao, Lei, Kai Cheng, Shijin Chen, Hui Ding, and Liang Zhao. "An approach to investigate moiré patterns of a reflective linear encoder with application to accuracy improvement of a machine tool." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 3 (2018): 927–36. http://dx.doi.org/10.1177/0954405417752506.

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The accuracy of a machine tool is based on the direct position feedback from its built-in encoders which accurately measure displacements of motion axes by moiré patterns. However, the posture of an encoder is altered by errors from the machine tool, resulting in six geometric deviations. A comprehensive analysis and scientific understanding on the influences of these deviations on moiré patterns are necessary. To investigate the influences, a simulation model of a reflective encoder is constructed to obtain moiré patterns, and four new methods are developed to identify characteristic paramete

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Liu, H. L. "Effects of Rotation Angle on the Circular Test of Geometric Errors." Key Engineering Materials 295-296 (October 2005): 289–94. http://dx.doi.org/10.4028/www.scientific.net/kem.295-296.289.

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DBB was originally manufactured and proposed for checking the accuracy of NC machine tools. The device can also be used to study the relations between motion error of trace and the machine motion error for the purpose of error compensation. The nominal angle obtained through rotation feed rate and sampling time was adopted instead of actual angle which cannot be measured by the device. This project examined in details the effect of the angle deviation problem caused by non-perpendicularity between the movements in axis X and axis Y. The analysis and calculation verified that a squareness devia

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Wang, Hongwei, Yan Ran, Shengyong Zhang, and Yulong Li. "Coupling and Decoupling Measurement Method of Complete Geometric Errors for Multi-Axis Machine Tools." Applied Sciences 10, no. 6 (2020): 2164. http://dx.doi.org/10.3390/app10062164.

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Precision and ultra-precision machining technology rely mainly on the machine tools’ accuracy. To improve it, the measurement, calculation, prediction and control of geometric errors are critical. The traditional measurement methods have lower precision because of ignoring small angle errors. To obtain complete geometric errors of multi-axis machine tools, this paper proposes a new method of coupling and decoupling measurement. Specifically, we used a laser interferometer and dial indicators to measure 36 items of complete geometric errors of multi-axis machine tools. A homogeneous transformat

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Tian, Wenjie, Shaopeng Liu, and Xingxing Liu. "Accuracy design of high precision machine tools using error sensitivity analysis methodology." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 18 (2016): 3401–13. http://dx.doi.org/10.1177/0954406216645625.

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Geometric accuracy is a crucially important performance factor for machine tools. Theoretically, the effects of source errors on pose accuracy (positional and angular accuracy) of 3-, 4- or 5-axis machine tools cannot fully be compensated by software, and only those pose errors associated with the permission motions are compensatable by means of error compensation. Therefore, the uncompensatable pose errors should be strictly guaranteed in the processes of design and manufacture. In this paper, after the geometric error model is established, the source errors affecting the uncompensatable pose

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Martin, Kirk A., and Nancy Weavers. "A Discussion of the Mechanical Limitations of Machinery Used For Sample-Preparation Processes." EDFA Technical Articles 18, no. 2 (2016): 4–10. http://dx.doi.org/10.31399/asm.edfa.2016-2.p004.

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Abstract Failure analysts use a variety of machines for sample preparation, many of which are mechanical in nature. This article discusses the factors that determine the accuracy, resolution, and repeatability of XY positioning systems, rotary stages, and multiaxis machines. It identifies critical machine parameters and explains how environmental effects, runout, and geometric inaccuracies contribute to uncertainty and positioning error. It also assesses the precision, accuracy, and repeatability required for backside thinning and delayering systems.

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