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Journal articles on the topic 'Headstock of horizontal machine tool'

Author: Grafiati
Published: 28 June 2021
Last updated: 5 February 2022

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1

Xu, Yakai, Weiguo Gao, Yuhan Yu, Dawei Zhang, Xiangsong Zhao, Yanling Tian, and Huaying Cun. "Dynamic Optimization of Constrained Layer Damping Structure for the Headstock of Machine Tools with Modal Strain Energy Method." Shock and Vibration 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/2736545.

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Dynamic stiffness and damping of the headstock, which is a critical component of precision horizontal machining center, are two main factors that influence machining accuracy and surface finish quality. Constrained Layer Damping (CLD) structure is proved to be effective in raising damping capacity for the thin plate and shell structures. In this paper, one kind of high damping material is utilized on the headstock to improve damping capacity. The dynamic characteristic of the hybrid headstock is investigated analytically and experimentally. The results demonstrate that the resonant response amplitudes of the headstock with damping material can decrease significantly compared to original cast structure. To obtain the optimal configuration of damping material, a topology optimization method based on the Evolutionary Structural Optimization (ESO) is implemented. Modal Strain Energy (MSE) method is employed to analyze the damping and to derive the sensitivity of the modal loss factor. The optimization results indicate that the added weight of damping material decreases by 50%; meanwhile the first two orders of modal loss factor decrease by less than 23.5% compared to the original structure.
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2

Zhang, Yao Man, Qi Wei Liu, and Jia Liang Han. "Finite Element Analysis on Thermal Characteristic of the Headstock of NC Machine Tool." Advanced Materials Research 291-294 (July 2011): 2302–5. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2302.

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The final manufacturing performances of the machine tools will be influenced by its thermal characteristics seriously and accurately predict thermal characteristic is helpful to improve the machine design level. Based on the analysis on factors that influence machine thermal characteristic, finite element analysis model of the headstock has been constructed, and the steady temperature field distribution and thermal equilibrium time calculation of the headstock are calculated, and then the temperature field and thermal deformation of the headstock under the action of heat and structure load have been calculated, and analysis to identify the trend of the spindle assembly and headstock heat distortion are also been done. The analysis reveals the machine processing performance influence will be influenced by the hot asymmetric, the study give priority to spindle assembly of optimization design, thermal error compensation.
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3

Zhang, Yao Man, Jia Liang Han, and Ren Jun Gu. "Thermal Characteristic Analysis on the Headstock of a High Precision CNC Machine Tool." Applied Mechanics and Materials 201-202 (October 2012): 157–61. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.157.

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The performances of the precision machine tool will be influenced by its thermal characteristics seriously, and accurately predict the thermal characteristic of the key component of the machine tool is helpful to improve the design level. The headstock of a high precision CNC lathes has been regarded as the research objects, and the thermal properties and its influence on the performance of the machine tool are studied. Finite element analysis model of the headstock has been constructed, and the simulation calculations of the steady temperature field distribution and thermal equilibrium time of the headstock are calculated, and then the analysis to identify the thermal deformation trends of the spindle assembly and the heat distortion of the headstock are also been done. Some of the key factors that have significant influence on the thermal characteristic of the high precision machine tools are also studied. The analysis reveals that the performances of the machine tool will be influenced by the hot asymmetric, the study lays a foundation for the optimization design and thermal error compensation of the spindle assembly.
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4

Cheng, Feng Lan, and Feng He Wu. "Topology Optimization of Headstock of Heavy Machine Tool." Advanced Materials Research 305 (July 2011): 442–45. http://dx.doi.org/10.4028/www.scientific.net/amr.305.442.

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The problem of topology optimization of large spindle box of heavy machine was studied. Based on ICM topology optimization, the parameters topology optimization were changed by sensitivity analysis and the sensitivity parameters were normalized; the topological parameters were modified and removed which judgment based on the sensitivity of the cross-section unit cell in the progress of optimization. Example shown that the integrated optimization method made the structure optimization more intuitive, not only avoided effectively the occurrence of the load strange in the optimization process, but accelerated the convergence speed.
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5

Sang, Lu Ping. "Turning-Milling Machining Center of Each Axis Movement Principle and the Headstock Structure Analysis." Advanced Materials Research 912-914 (April 2014): 878–81. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.878.

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Turning milling machining center are analyzed the structure and working principle of headstock of numerical control machine tool headstock consists of motor, drive system and components of the head of a bed, is mainly used to achieve the main movement of the machine tool. Spindle structure adopts precision double row cylindrical roller bearing and two-way thrust angular contact ball bearing group and type. The machine is the best combination of lathe and milling machine. Configuration French NUM1060 system, realize five axis control, a loading card can complete a variety of difficult machining of complex.
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6

Wang, Yahui, Ling Shi, Yiqi Dang, Shengkai Sun, and Huipeng Zhang. "Application of the Headstock of CNC Boring Machine for Tractor Engine Cylinder Block Based on Multi-Objective Genetic Algorithm." Applied Engineering in Agriculture 37, no. 2 (2021): 343–49. http://dx.doi.org/10.13031/aea.14459.

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HighlightsThe headstock of the single-sided horizontal CNC boring machine specializing in processing tractor 6-cylinder engine cylinders is optimized.The constraint conditions such as tooth width and modulus are constructed. The model is optimized by the NSGA algorithm, and the optimization results are good.The optimization results of the NSGA algorithm are compared with the results of the weighted sum method and the GA, which highlights the superiority of the NSGA algorithm.ABSTRACT. The tractor is one of the most frequently used equipment in agricultural production, and its mass production is the general trend. With the continuous advancement of the global industrialization process, the importance of Computer Numerical Control (CNC) machine in the entire industrial production has become more and more prominent, and the application of CNC machine in tractor manufacturing has greatly improved production efficiency. This article takes the headstock of a single-sided horizontal CNC boring machine dedicated to processing tractor 6-cylinder engine cylinders as the research objective, takes the key parameters of the gear train in the headstock as the optimization design variables, constructs constraints, such as modulus, tooth width, etc., establishes a multi-objective optimization mathematical model, uses the Non-dominated Sorting Genetic Algorithm II (NSGA-II) to process the model and obtains the Pareto solution set through multiple iterations. The optimization results show that the volume, center distance and the reciprocal of coincidence degree of the main shaft 1 transmission group are reduced in varying degrees. Finally, it is compared with the weighted sum method and genetic algorithm (GA) to highlight the superiority of NSGA-II. Keywords: Headstock, Multi-optimization, Non-dominated Sorting Genetic Algorithm II, Tractor cylinder.
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7

Li, Zhe, Song Zhang, Yan Chen, Peng Wang, and Ai Rong Zhang. "Dynamic Characteristics Analysis for the Headstock of a Vertical Machining Center." Materials Science Forum 836-837 (January 2016): 348–58. http://dx.doi.org/10.4028/www.scientific.net/msf.836-837.348.

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Dynamic characteristics of numerical control (NC) machine tools, such as natural frequency and vibration property, directly affect machining efficiency and finished surface quality. In general, low-order natural frequencies of critical components have significant influences on machine tool’s performances. The headstock is the most important component of the machine tool. The reliability, cutting stability, and machining accuracy of a machining center largely depend on the structure and dynamic characteristics of the headstock. First, in order to obtain the natural frequencies and vibration characteristics of the headstock of a vertical machining center, modal test and vibration test in free running and cutting conditions were carried out by means of the dynamic signal collection and analysis system. According to the modal test, the first six natural frequencies of the headstock were obtained, which can not only guide the working speed, but also act as the reference of structural optimization aiming at frequency-shift. Secondly, by means of the vibration test, the vibration characteristics of the headstock were obtained and the main vibration sources were found out. Finally the corresponding vibration reduction plans were proposed in this paper. That provides the reference for improving the performance of the overall unit.
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8

Sheng, Zhong Qi, Chang Chun Liu, Jian Yong Wang, and Liang Dong. "Research on Thermal Characteristic and Thermal Compensation Technology of Spindle System of CNC Machine Tool." Advanced Materials Research 490-495 (March 2012): 1595–99. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.1595.

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The paper mainly studies the thermal characteristic and methods of thermal compensation of the spindle system of a precision turning center. The three-dimensional model of spindle system is constructed and meshed by ANSYS Workbench. The boundary condition and heat source of the spindle system are computed by relevant theory and the results are applied to the finite element model. By comparing results of FEM and experiment, the boundary condition is adjusted if necessary to make the analysis results be similar to experimental results. Then the temperature field is used as a load to calculate the thermal deformation. Two ways of changing boundary condition of spindle system have been analyzed to find their influence on spindle thermal deformation, which are changing air flowing speed around headstock and setting up a cooling jacket at the front surface of the headstock respectively.
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9

Brecher, C. Prof, and M. Klatte. "Sensorischer Spindelstock zur Thermo-Korrektur*/Sensory headstock for thermo compensation." wt Werkstattstechnik online 107, no. 07-08 (2017): 500–506. http://dx.doi.org/10.37544/1436-4980-2017-07-08-24.

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Vorgestellt wird ein Sensorkonzept zur integralen Dehnungsmessung für Werkzeugmaschinenstrukturen. Mithilfe dieser Sensoren ist die Implementierung traditioneller sowie neuartiger Methoden zur steuerungstechnischen Korrektur thermisch bedingter Tool-Center-Point-Verlagerungen möglich. Die Sensoren wurden im Spindelstock einer 3-achsigen Vertikalfräsmaschine umgesetzt sowie Korrekturkonzepte mit unterschiedlichen Modellierungsverfahren validiert.   In this paper, a sensor concept for integral strain measurement in machine tool structures is introduced. With the help of these sensors the implementation of both traditional and novel methods for the control-based compensation of thermally induced tool center point dislocations is possible. The sensors have been integrated in the headstock of a 3-axis vertical milling machine. Furthermore, correction concepts with different modeling methods have been validated.
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10

Sun, Guo Yan, Jian Hua Zhang, Hao Yang, and Gang Li. "Modal Analysis of Artificial Granite Grinding Machine Tool Bed." Advanced Materials Research 971-973 (June 2014): 573–76. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.573.

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Machine tool bed, which supports headstock, tailstock and other functional components, is one of the important structure parts of machine tools. Precision grinding machine tool beds are designed by the authors with artificial granite and cast iron respectively for research. Their three-dimensional models were established via software SOLIDWORKS and then imported into the finite element software (ANSYS) to simulate for the first eight modal frequencies and the corresponding vibration modes. Simulation results show that the first eight order natural frequencies of artificial granite bed are better and the corresponding maximum amplitude of vibration modes are decreased significantly than cast iron bed. The dynamical properties of artificial granite bed are obviously better than grey cast iron bed.
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11

Liu, Yang, Ying Lu, Xue Feng Bi, and Guang Qi Cai. "Research on the Influence of Shields to Thermal Equilibrium of CNC Machine Tool." Materials Science Forum 626-627 (August 2009): 441–46. http://dx.doi.org/10.4028/www.scientific.net/msf.626-627.441.

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In order to investigate that shields have the effect on the thermal equilibrium of CNC machine tool, this paper applies the theory of heat transfer and finite element analysis to analyze the thermal characteristics of CNC lathe CK40A/1000. By ANSYS software, the temperature distributions of spindle engine, headstock and bearing at thermal equilibrium with/without shields are obtained. By analyzing thermal equilibrium patterns and experiments, the temperature of spindle bearings with shields are 3-4 higher than without shields at thermal equilibrium. And shields have less influence on the temperature gradient of tool inner thermal sources.
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12

Babu, Ramesh, V. Prabhu Raja, J. Kanchana, and Devara Venkata Krishna. "Identification, development and testing of thermal error compensation model for a headstock assembly of CNC turning centre." International Journal of Engineering & Technology 3, no. 2 (March 27, 2014): 113. http://dx.doi.org/10.14419/ijet.v3i2.2012.

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In CNC machine tools, transient temperature variation in the headstock assembly is the major contributors for spindle thermal error. The compensation of thermal error is critical for ensuring the accuracy of machine tool. The performance of an error compensation system depends largely on the accuracy and robustness of the thermal error model. In the present work, a robust thermal error model is developed for minimizing the error in lateral direction of the spindle which significantly influences the geometrical accuracy of the workpiece. Analysis-of-variance (ANOVA) is applied to the results of the experiments in determining the percentage contribution of each individual temperature key point against a stated level of confidence. Based on the analysis of existing approaches for thermal error modeling of machine tools, an approach of LASSO (least absolute shrinkage and selection operator) is proposed in order to avoid the multi collinearity problem. The proposed method is an innovative variable selection method to remove redundant or unimportant temperature key points in the linear thermal error model and minimize the residual sum of squares. The predictive error model is found to have better robustness and accuracy in comparison to the combination of grey correlation and step wise linear regression for error compensation of CNC lathe. Keywords: Analysis Of Variance (ANOVA), CNC Machine Tool, Grey Correlation Analysis (GCA), Headstock Assembly, LASSO Regression, Mean Absolute Deviation (MAD), Mean Square Error (MSE), Robustness, Standard Deviation (SD), Thermal Error.
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13

Zhao, Hong Lin, Qing Fu Wang, Wei Hua Li, Guang Peng Zhang, Zhi Heng Wu, Bo Gao, and Shi Guang Chen. "Research on Machine Tool Components Contribution Calculation and the Weak Link Identification of the Whole Machine." Applied Mechanics and Materials 52-54 (March 2011): 1496–502. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.1496.

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After modeling and calculating of whole machine, the static and dynamic characteristics are obtained, since it is difficult not only to judge out machine components’ influence on machining precision intuitively , but also to identify the weak link of the whole machine. Therefore, through extracting key nodes coordinates of machine components and deformation information of finite element software calculated, we brought forward a space vector transfer algorithm, calculated the contribution of components for tools and work piece system and expressed impact of machine components on tool and work piece system by histogram. By this means ,we can judge out the whole machine’s weak links intuitively. Take XK713B Vertical Milling Machine as the case research object, extract key nodes and their deformation information of general structure such as lathe bed , column, headstock, sliding table, workbench etc. By using space vector transfer algorithm, the result shows that the largest contribution to tool system and workbench system is column, which is the weakest link in the whole machine and its vibration type is swing. According to this, further optimize design of column can be proceed.
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14

Zhang, Yao Man, Yong Chen, and Hu Li. "Temperature Field Analysis and Thermal Error Testing for CNC Machine Tool's Headstock." Advanced Materials Research 889-890 (February 2014): 316–20. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.316.

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The dynamic and thermal characteristics of spindle assembly will affect the final machining performance of a machine tool seriously. It is of great significance to study the dynamic and thermal characteristics of the spindle assembly for improving the level of machine tool's design and manufacturing. The paper takes a high precision computer numerical control lathe as the research object. First the thermal characteristics were obtained by using finite element method. Then the laser triangle measuring instrument and the infrared thermal imager were used to measure the temperature field and thermal deformation of the spindle assembly. Finally in order to get the thermal equilibrium time and the thermal deformation data of spindle system, the wavelet toolbox was used to deal with thermal testing data. The paper's work laid a foundation for the further research on the thermal characteristics analysis and thermal error's compensation of machine tools.
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15

Liu, Haitao, and Wenming Wei. "Key Technologies of Finite Element Modeling of Machine Tools Based on ANSYS Platform." MATEC Web of Conferences 175 (2018): 03050. http://dx.doi.org/10.1051/matecconf/201817503050.

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In order to establish the joint interface elements more quickly, and to analyze the dynamic characteristics of machine tools under different states (such as headstock at different position), the CAD model of machine tool must be divided effectively, so that the hexahedron elements with specified size can be generated in the area of the joint interfaces, so that the nodes on the joint surfaces can be coincident. Using APDL technology, the linear spring-damped elements are quickly established on the fixed joint (bolt joint interface between the bed and base) and the moving joint (guideway-slider, screw-nut). The experimental and simulation results show that the method is effective.It has considerable accuracy, and can greatly speed up the machine tool modeling, especially the processing speed of the joint interfaces.
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16

Li, Dian Xin, Ping Fa Feng, and Jian Fu Zhang. "Simulation, Experiment and Optimization for Thermal Characteristics of a Machine Tool Spindle System." Key Engineering Materials 693 (May 2016): 403–10. http://dx.doi.org/10.4028/www.scientific.net/kem.693.403.

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Taking a vertical machining center as an example, thermal characteristics of the spindle system were researched by finite element simulation and experimental test. Firstly, temperature field and thermal deformation of the spindle system were simulated considering boundary conditions of the finite element model, such as heat sources, convective heat transfer coefficients and thermal contact resistances between joints. Accuracy of the simulation was verified compared with test. The results shows that key areas of temperature rise locate at spindle bearing; thermal deformation of Y and Z directions are large; thermal characteristics of the spindle system has little influence on other parts. Thermal characteristics of the spindle system were optimized by changing structures and sizes of the cooling passage located at the headstock, and effectiveness of the optimization was verified by finite element simulation. The research results provide guidance for thermal characteristic simulation and optimization of a machining center.
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17

Sheng, Zhongqi, Lei Zhang, Hualong Xie, and Changchun Liu. "Research on Key Technologies of Unit-Based CNC Machine Tool Assembly Design." Mathematical Problems in Engineering 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/191069.

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Assembly is the part that produces the maximum workload and consumed time during product design and manufacturing process. CNC machine tool is the key basic equipment in manufacturing industry and research on assembly design technologies of CNC machine tool has theoretical significance and practical value. This study established a simplified ASRG for CNC machine tool. The connection between parts, semantic information of transmission, and geometric constraint information were quantified to assembly connection strength to depict the assembling difficulty level. The transmissibility based on trust relationship was applied on the assembly connection strength. Assembly unit partition based on assembly connection strength was conducted, and interferential assembly units were identified and revised. The assembly sequence planning and optimization of parts in each assembly unit and between assembly units was conducted using genetic algorithm. With certain type of high speed CNC turning center, as an example, this paper explored into the assembly modeling, assembly unit partition, and assembly sequence planning and optimization and realized the optimized assembly sequence of headstock of CNC machine tool.
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18

Ren, Ai Hua, and Chuan Qiong Sun. "The Design of Control System of Camshaft Grinding Machine Based on FANUC 0i-TC." Advanced Materials Research 468-471 (February 2012): 1136–40. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.1136.

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Grinding machine is widely used in the camshaft producing process. H187 slanting headstock camshaft grinding machine is upgraded from the original relay, contactor and other electronic controlled system into PMC controlled CNC machine tool by using FANUC 0i-TC system, which is not only to adapt to the current auto industry production mode of “more batches and more variety”, but also to improve the production efficiency and the manufacturing quality. The upgrading process is introduced especially from the following aspects such as the design of CNC system architecture and electrical control system, development of grinding feed NC program and PMC program. It is proved that this transformation fully realized the expected goals from practice.
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19

Meng, Xiang Zhi, Jia Shun Shi, Guang Qi Cai, Ming Hu, and X. Chen. "A New Vertical-Horizontal Conversion Parallel Machine Tool." Key Engineering Materials 259-260 (March 2004): 734–38. http://dx.doi.org/10.4028/www.scientific.net/kem.259-260.734.

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20

Li, Yang, Ji Zhao, and Shi Jun Ji. "The Use of DBB Measurement in Horizontal Machine Tool." Advanced Materials Research 1027 (October 2014): 274–77. http://dx.doi.org/10.4028/www.scientific.net/amr.1027.274.

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The double ballbar(DBB) is an instrument to measure roundness error of the machine tools. Traditionally, DBB is used in the vertical machine tool which has a vertical spindle, so the DBB can be easily installed to measure without additional jigs. But the condition in the horizontal machine tool is different. Because the horizontal machine tool has no vertical spindle, additional jigs are needed for the measurement. Not only the differences in the using DBB but also in the forming circular trajectory exist. Center of the circular trajectory in the vertical machine tool is stationary, but not in the horizontal machine tool. The trajectories of two balls of the DBB are not same in the two kinds of the machine tools. The method that the DBB measurement in the horizontal machine tool has the same effect comparing with the measurement in the vertical machine tool is presented.
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21

Rudyk, Andrey, Volodymyr Chupryna, and Vladislav Rudyk. "Effect of shape formation on the accuracy of grinding ends while compensating for machine tool errors." Eastern-European Journal of Enterprise Technologies 2, no. 1 (110) (April 20, 2021): 90–96. http://dx.doi.org/10.15587/1729-4061.2021.226479.

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There are several general methods for correcting errors related to positioning the machine tool structural units. The task to achieve optimal manufacturing accuracy can be resolved by using a compatible solution to vector equations, a variation of the shape formation function, or applying a matrix of transfer coefficients. However, there is no mutual relationship between various calculation methods for the case of grinding flat surfaces. The methods should be simplified and tested for the elongated shape formation function while considering the links’ dimensions. This paper reports a study into the accuracy of grinding flat surfaces, determining and reducing the share of manufacturing errors. The content of variation matrices and transfer coefficients has been substantiated. The comparison of the orientation angles of the grinding machine headstock relative to the machine tool bed has demonstrated close results from all methods. These angles were taken as machine tool errors. The calculation error does not exceed 1.5 %. The experiments are consistent with the calculations. Different signs of the transfer coefficients in the orientation angles of grinding machine headstocks in the matrix make it possible to mutually compensate for the overall impact. The calculations have shown that the accuracy of the side-end machining is largely affected by a change in the orientation angle in the vertical plane. The effect exerted on the accuracy of individual mated parts by the machine tool structural units has been estimated. The calculations show that the error of positioning a part in the drum window acquires the highest absolute values and is random in nature, which requires a more accurate base positioning. The findings from both theoretical and experimental studies have been applied. The mathematical model makes it possible to determine the degree of scattering the end surface around the base plane via its variance. The measured trajectory provides diagnostic information about the sources of error in the machine tool assembly. A task to calculate the accuracy of the end-grinding machine tool can be solved for other models of machine tools in the same way
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22

Maresca, Piera, Emilio Gómez, Jesús Caja, and Cintia Barajas. "Modeling of a Horizontal Coordinate Measuring Machine." Key Engineering Materials 615 (June 2014): 177–82. http://dx.doi.org/10.4028/www.scientific.net/kem.615.177.

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This paper presents a new virtual environment aimed to the realization of dimensional metrology practices, in the framework of the Degree in Mechanical Engineering of Technical University of Madrid. The development of this project allows the implementation of an interactive teaching model, focused on the student, which combines master classes and virtual applications, in an environment known as DE–learning (driven e-learning). This teaching tool directs and helps students on an individual way in the dynamic and interactive practice development. In particular, this module simulates the functioning, calibration and measurements using a horizontal coordinate measuring machine (HCMM). The program interface has been developed trying to create an easy-to-use environment for the students, in order to be a first contact with the HCMM and its possible metrological applications.
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23

Huang, Yu Bin, Wei Sun, Qing Chao Sun, Yue Ma, and Hong Fu Wang. "Numerical Analysis of Thermal Error for a 4-Axises Horizontal Machining Center." Applied Mechanics and Materials 868 (July 2017): 64–68. http://dx.doi.org/10.4028/www.scientific.net/amm.868.64.

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Thermal deformations of machine tool are among the most significant error source of machining errors. Most of current thermal error modeling researches is about 3-axies machine tool, highly reliant on collected date, which could not predict thermal errors in design stage. In This paper, in order to estimate the thermal error of a 4-axise horizontal machining center. A thermal error prediction method in machine tool design stage is proposed. Thermal errors in workspace in different working condition are illustrated through numerical simulation and volumetric error model. Verification experiments shows the outcomes of this prediction method are basically correct.
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24

Li, Yang, Ji Zhao, Shi Jun Ji, and Xin Wang. "A New Error Compensation Method for a Four-Axis Horizontal Machine Tool." Key Engineering Materials 679 (February 2016): 1–5. http://dx.doi.org/10.4028/www.scientific.net/kem.679.1.

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A new method compensating geometric error components of a four-axis horizontal machine tool is presented in this paper. Homogeneous transformation matrices (HTMS) and error conversion are integrated in the compensation strategy. A mathematical model which contains 29 geometric error components is established based on HTMS and the errors in X, Y and Z directions are obtained through calculation. The errors in three directions are compensated by shifting the corresponding axis. But the configuration of this machine tool is X-axis, Z-axis, B-axis, C-axis without Y-axis, so the errors in X, Y and Z directions need to be converted into X, Z and C directions which is different from the traditional machine tools. The errors after conversion are used to compensation directly. This approach is significant for the error modeling and compensation which is an easy and efficient way to improve the precision of the four-axis machine tools.
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25

Petreshin, Dmitriy, Viktor Khandozhko, Andrey Dubov, and German Dobrovolsky. "Improvement of horizontal borer control system." Science intensive technologies in mechanical engineering 2020, no. 7 (July 16, 2020): 41–48. http://dx.doi.org/10.30987/2223-4608-2020-7-41-48.

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The control system improvement of a machine-tool is considered. The necessity in control system updating is substantiated. There is shown a procedure for horizontal borer updating. A problem on adjustment of modern digital electrical feed drives is presented. A sample of electrical feed drive and NC device adjustment is presented.
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26

Allwood, J. M., N. E. Houghton, and K. P. Jackson. "The Design of an Incremental Sheet Forming Machine." Advanced Materials Research 6-8 (May 2005): 471–78. http://dx.doi.org/10.4028/www.scientific.net/amr.6-8.471.

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A new incremental sheet forming machine has been built in Cambridge and was commissioned in October 2004. The basis for the machine design is described, including estimates of tool forces, the need for access to the reverse side of the workpiece, and the need to cope with high horizontal loads at the tool tip. The tool-mounting has been designed to rotate freely but passively, and to allow for simple exchange of tool tips. The workpiece is mounted on a set of load cells providing a six degree of freedom constraint without moment loading of the cells. The initial operation of the machine is briefly described.
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27

Zhao, Yan, Wen Bin Li, Hao Ran Liu, and Jing Shao. "Double-Spindle Symmetrical Machining to Improve Machining Efficiency." Advanced Materials Research 403-408 (November 2011): 4367–70. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.4367.

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In order to improve the machining efficiency of the duralumin turbine rotor of maglev molecular pump, this paper proposes a new double-spindle horizontal milling machining center structure. Through a brief introduction to other types of machine tools, describes the characteristics of this new machine tool and symmetrical machining implementation. This paper proposes a new double-spindle horizontal milling machining centers so that the machining efficiency of duralumin turbine rotors is improve 100% more than that of the traditional machine tool in theory. Moreover, its machining accuracy get relative improve as the decrease of the dividing accumulative error. At the same time, the cost of workpiece is reduced greatly.
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28

Ma, X. B., Jian Qiu, Qi Wei Liu, and J. F. Lin. "Study on Spindle Thermal Field Distribution and Thermal Errors of Horizontal Machine Tool." Materials Science Forum 697-698 (September 2011): 273–76. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.273.

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Research on thermal field and thermal errors of NC machine tools were carried on using infrared imaging and laser distance measurement technologies. It mainly focused on the analysis of thermal field distribution of a three-axis horizontal machining center and the relationships between thermal behaviors and their temperatures. It was found experimentally that spindle thermal errors is one of the main errors sources of NC machine tools, and spindle thermal errors has been observed to be closely linked to the temperature distribution of machine tools. There was a significant increase in the axis positioning error related to the spindle temperature increasing. The elongations on Z direction are much larger than the extensions of X and Y directions. Finally, a method by adjusting spindle temperature to control spindle thermal errors was taken.
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29

Huang, Yu Bin, Yue Ma, Qing Chao Sun, Wei Sun, Wen Bin Yue, and Xin Sun. "Dynamic Modeling and Optimal Design of a Horizontal Machining Center Based on Experimental Modal Analysis." Applied Mechanics and Materials 868 (July 2017): 271–76. http://dx.doi.org/10.4028/www.scientific.net/amm.868.271.

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The modeling and optimization of machine tool’s dynamic performance remains to be a grand challenge in machine tool design. In this paper. In order to identifying the concentrated modals of a horizontal machining center, a combined experiment modal analysis method is proposed. A FEA dynamic model accurate in frequency and mode shape is built and verified by comparing with EMA results. Based on the model the optimization of frame structure is made, Simulation results shows the optimized frame enhances the dynamic performance of machine tool.
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Guan, Shang Jun, Ke Yang, Jun You Sun, and Wen Jie Zheng. "The Design of a Horizontal Combining CNC Machine Tool of Turning and Grinding." Applied Mechanics and Materials 271-272 (December 2012): 544–48. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.544.

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This paper describes and introduces the design method and driving principle of the horizontal Combining CNC machine Tool of Turning and Grinding in which the turning tool holder and wheel frame are arranged on both sides. In the meantime, it verifies the reliability of this scenario by digital module and dynamic simulation, which creates a solid base for the manufacture of CNC in the future.
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31

Li, Zhi, X. S. Zhao, and D. W. Zhang. "The Research of the Dynamic Characteristics of Horizontal Jig Boring Machine." Advanced Materials Research 712-715 (June 2013): 1391–94. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1391.

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Modal analysis is one way of studying the dynamic characteristics of the mechanical. In order to study the dynamic characteristics of machine tool,numerical machine model is set up with finite element analysis software,of which validity is verified by experimental modal analysis.The experimental test also provide the boundary conditions, so as to further structure modification and dynamic characteristic design
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32

Semjon, Ján, Peter Demeč, and Jozef Svetlík. "Virtual Model of Tool Path for Milling Machine at Classical Design Base." Applied Mechanics and Materials 282 (January 2013): 235–41. http://dx.doi.org/10.4028/www.scientific.net/amm.282.235.

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This article focuses on issue of proposal ideal tool paths for machine tools. Model of machine consists from 6 basic knots where milling machine disposes spindle placed in the horizontal direction are. Based on mathematical analysis we can detect the movement of machine axes for uncertainty investigated. The calculated values can be compared with machine model developed in Computer - Aided Design. Defining the shape of workpiece as well as assigning an appropriate instrument can be determined by true value of precision workpiece. After substituting the values of specific dimensions we get the final position of vectors point for contact in tool coordinate systems at individual model solids.
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33

LEE, Sunkyu, Hidenori SHINNO, Chikao INABA, and Yoshimi ITO. "A New Simulation Method for Thermal-appropriate Design of Machine Tool Structure. (Its Application to Clarify Effects of Main Bearing Surroudings and Headstock Structure)." Transactions of the Japan Society of Mechanical Engineers Series C 57, no. 538 (1991): 2092–99. http://dx.doi.org/10.1299/kikaic.57.2092.

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34

Ni, Jun. "CNC Machine Accuracy Enhancement Through Real-Time Error Compensation." Journal of Manufacturing Science and Engineering 119, no. 4B (November 1, 1997): 717–25. http://dx.doi.org/10.1115/1.2836815.

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Improving CNC machine tool accuracy has received significant attention recently. This paper intends to provide an introduction of the real-time error compensation methods as applied to reduce both geometric and thermally induced quasistatic machine tool errors. An illustrative example is used to demonstrate the use of error compensation systems for a horizontal machining center. Although several industrial applications of these error compensation systems have achieved significant results, a few major barriers have prevented this promising technology from being applied widely in manufacturing. Several ongoing research activities aimed at overcoming the barriers are also presented.
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35

Wu, Huan Qin, and Wei Qing Wang. "The Improved Design of Machine Tool Structure Based on Sensitivity Analysis." Applied Mechanics and Materials 423-426 (September 2013): 1929–35. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.1929.

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The machine tool bed is an important component of the center. The function is components of support column, worktable and so on. The machining accuracy can be influenced by the function machine tool bed. To establish the finite element model of horizontal machining center by Solid works. And the first six orders modal can be analyzed by Ansys. The dynamic sensitivity analysis is used to determine the parameters of stiffened plate by sensitivity optimization method. The better structure parameters can be getting by making a structural optimization design for the analysis. Finally, the dynamic characteristics and function of the machine tool bed can be improved.
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36

Yun, Qing, Wen Tie Niu, Jun Qiang Wang, and Li Zhang. "Structure Design of Precision Horizontal Machining Center and Multi-Objective Optimization of Large Structural Components." Advanced Materials Research 712-715 (June 2013): 1514–18. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1514.

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This paper presents the technical process of machine tool design and multi-objective optimization of large structural components based on Pro/E and SAMCEF. The main contents include: the design process of the machine tool layout and the large structural components; finite element modeling methods of the fixed joint, screw-nut joint and guide-slider joint; the optimization method of large structural components based on response surface model. A precision horizontal machining center is used as an example to verify the correctness and feasibility of the method.
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37

Funaru, Marian, and Gheorghe Stan. "Influence of Guideways Misalignment on the Positioning Precision of Kinematic Feed Chains Used on CNC Machine Tools." Applied Mechanics and Materials 657 (October 2014): 539–43. http://dx.doi.org/10.4028/www.scientific.net/amm.657.539.

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The main goal of the kinematic feed chains used on numerically controlled machine tools is to ensure the relative position between the manufactured part and the cutting tool tip with a high accuracy. Therefore, the positioning precision is a major performance criterion for CNC machine tools. The guidance system of the machine table, together with the actuation system and the closed-loop control system, represents a key factor in manufacturing high precision machine tools. Mounting and alignment errors of guideways, both in vertical and horizontal directions, directly affect the table positioning precision and implicitly, the manufacturing precision of the machine tool. Guideways misalignment also generates stresses, plays and excessive run-out. The present paper contains a method of experimental analysis regarding the influence of guideways alignment errors on the positioning precision of the kinematic feed chains, which takes into account the alignment of the two guide rails, both in vertical and horizontal plans. The feed axis used in the experimental setup is closed-loop controlled, making use of an indirect position measurement system.
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38

Chang, Y. S., and J. J. Fang. "Revival of 1920s Belt-Driven Machine Tools with Virtual Reality." Applied Mechanics and Materials 163 (April 2012): 155–61. http://dx.doi.org/10.4028/www.scientific.net/amm.163.155.

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Taking one of the belt-driven machine tools, horizontal milling machine, as the protagonist, the study constructs a virtual environment based on OpenGL and Microsoft Foundation Class without using any well-developed commercial VR software. Belt-driven mechanism was developed in the 1920s, at which time the motor was first invented and rather expensive. Because of difficult preservation and underlying hazards in mechanical antiques, resurgence of the horizontal milling machine in virtual reality is proposed and an exhibition room is permanently settled to memorize the history of mechanical engineering in the 1920s. Aside from the application of exhibition, this developed system also allows users to operate the machine tool in the same manner as in reality.
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Sun, Wei-Heng, and Syh-Shiuh Yeh. "Using the Machine Vision Method to Develop an On-machine Insert Condition Monitoring System for Computer Numerical Control Turning Machine Tools." Materials 11, no. 10 (October 14, 2018): 1977. http://dx.doi.org/10.3390/ma11101977.

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This study uses the machine vision method to develop an on-machine turning tool insert condition monitoring system for tool condition monitoring in the cutting processes of computer numerical control (CNC) machines. The system can identify four external turning tool insert conditions, namely fracture, built-up edge (BUE), chipping, and flank wear. This study also designs a visual inspection system for the tip of an insert using the surrounding light source and fill-light, which can be mounted on the turning machine tool, to overcome the environmental effect on the captured insert image for subsequent image processing. During image capture, the intensity of the light source changes to ensure that the test insert has appropriate surface and tip features. This study implements outer profile construction, insert status region capture, insert wear region judgment, and calculation to monitor and classify insert conditions. The insert image is then trimmed according to the vertical flank, horizontal blade, and vertical blade lines. The image of the insert-wear region is captured to monitor flank or chipping wear using grayscale value histogram. The amount of wear is calculated using the wear region image as the evaluation index to judge normal wear or over-wear conditions. On-machine insert condition monitoring is tested to confirm that the proposed system can judge insert fracture, BUE, chipping, and wear. The results demonstrate that the standard deviation of the chipping and amount of wear accounts for 0.67% and 0.62%, of the average value, respectively, thus confirming the stability of system operation.
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40

Vorkapić, Nikola, Saša Živanović, Zoran Dimić, Branko Kokotović, and Nikola Slavković. "Virtual horizontal machining center LOLA HBG 80 for program verification and monitoring." FME Transactions 49, no. 3 (2021): 696–703. http://dx.doi.org/10.5937/fme2103696v.

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This paper describes configuring the virtual horizontal machining center LOLA HBG80 within the programming and verification system and the open architecture control system. The horizontal machining center LOLA HBG 80 is represented by an equivalent virtual machine in a CAD/CAM environment (PTC Creo and Catia), STEP-NC Machine environment, and the control system. Virtual simulation is essential for machining, and the developed virtual machines are used for program verification and monitoring of the machining process. The virtual machine in the programming system allows the verification of the program before sending it to the real machine and includes verification of the tool path (CLF-Cutter Location File) and G-code. The paper also discusses the possibility of applying a new programming method known as STEP-NC and preparing an adequate environment that includes a virtual machine. The virtual machine in the control system represents the last level for the final program verification and the process monitoring system.
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41

Shi, Hong, Wei Xu, and Guang Qi Cai. "Control and Analysis of Nonlinear Error for 5-Axis Machining of Hybrid Machine Tool." Key Engineering Materials 375-376 (March 2008): 485–89. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.485.

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Complex parts are the main object for CNC machining. The 3-TPS hybrid machine tool can achieve 3-axis, 4-axis, 5-axis, vertical and horizontal machining. The analysis of nonlinear error of the 3-TPS hybrid machine tool on 5-axis machining and the reduction the error by self-adaptation linearization are introduced in the paper. The obtained formula for nonlinear error can be used in different situations and estimate three-dimensional cutter evelope forming error.
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42

Cao, Shu Kun, Shang Wei Yang, Jing Bo Yin, Hui Zhang, and Hai Long Deng. "Lengthening Steel-Work Hole Processing Machine Design Based on Open CNC System." Advanced Materials Research 181-182 (January 2011): 685–90. http://dx.doi.org/10.4028/www.scientific.net/amr.181-182.685.

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This paper describes two schemes of lengthening steel structure hole processing machine tool. Their base length of lengthening steel structure hole processing machine tool is fixed and the column who can move around realizes the horizontal movement by dovetail slot and the screw. The former can realize that a machine can simultaneously process multiple holes after work-piece being clamped once. The latter is that machine tool can only process a single hole for the work-piece clamping, then process other holes by the mobile of the column and the spindle box. It is not only labor-saving and energy but is efficiency. Through the NC programming, the machine tool can fast install the parts and process four holes at the same time accurately. In allusion to all sorts of questions of the present NC programming using G, M code, lengthening steel structure hole processing machine tool based on open CNC is proposed in the paper, which can machining parts directly by using the corresponding computer modules and achieves information sharing of work-piece.
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43

Lin, Xian Xiang, Ze Yu Weng, Bo Lu, Tuo Yang, and Hong Gang Ding. "Dynamic Modeling of CNC High Precision Surface Grinding Machine with Horizontal Spindle and Rotary Table MGK7350." Applied Mechanics and Materials 141 (November 2011): 119–23. http://dx.doi.org/10.4028/www.scientific.net/amm.141.119.

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The dynamic model of machine tool structure is the basic of its dynamic analysis and dynamic optimization. The determination of joint interface stiffness and damping of grinding machine structures is one of key problems to dynamic analysis of machine tools. A method to identify interface dynamic parameters of grinding machine structures using measured transfer function data and optimization technique is presented in this paper. Finally, do the whole machine modal analysis with method and finite element method, contrast the experimental and theoretical results, proved this finite element model can stimulate the dynamic performance of the whole machine effectively, it is of practical value of engineering application.
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44

Wu, Qin, and Jian Jun Yang. "The Vibration Characteristic Analysis of Feed System of CNC Machine Tool." Applied Mechanics and Materials 482 (December 2013): 169–73. http://dx.doi.org/10.4028/www.scientific.net/amm.482.169.

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The mathematical model of feed system of CNC machine tool was established base of Lagrange Equation and energy principle, then uses the Runge-Kutta method to solve the equation, and analyzes the influence that the parameters to the vibration displacement of ball screw. According to the result of orthogonal test, it is concluded that the most important three factors which influence ballscrew vibration displacement were the ball screw's lead h, the table quality m and the longitudinal contact stiffness kn in the connection of workbench and ballscrew. On the feed system test-bed, the longitudinal amplitude, torsional amplitude and horizontal amplitude of ball screw were measured, the results show the larger the ball screw's lead and the quality of workbench, the greater the amplitude of ball screw, the bigger the longitudinal contact stiffness kn, and the smaller the amplitude of screw.
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45

Hung, Jui Pin, Wei Chu Lin, Tzou Lung Luo, and Yu Sheng Lai. "Dynamic Characteristics of a Horizontal Milling Machine with Hybrid Guideway Systems." Applied Mechanics and Materials 423-426 (September 2013): 2127–31. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.2127.

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This study was aimed to investigate dynamic characteristics of a milling machine with horizontal spindle tooling system, which was feed through the linear feeding mechanism combined with the sliding guides and linear roller guide modulus. To predict the dynamic characteristics, we created finite element model of the milling machine with the introduction of the contact stiffness defined at the sliding and rolling interface, respectively. The results of the finite element simulations reveal that linear guides with different preloads greatly affect the dynamic responses of the horizontal spindle tool. The maximum dynamic compliance can be increased by 7.4 % in X-axis direction and increased by 12 % in Y-axis direction, respectively when the linear guides are changed from low to high preload. Overall, current results clearly illustrate that the proposed modeling approach of feeding mechanism can quantify the preload effect of the guideway system on the dynamic performance of a milling machine.
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46

Zhang, Ya Wei, and Wei Min Zhang. "Analysis of Dynamics Characters of Bed Structure of CNC Machine Tool on FEM Method." Applied Mechanics and Materials 141 (November 2011): 208–11. http://dx.doi.org/10.4028/www.scientific.net/amm.141.208.

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In order that the CNC machine tool has to achieve very high process accuracy, the bed structure has to have a reasonable construction to meet this strict technical demand. The bed structure of machine tool as a important component is analyzed in order to be clarified about its vibration mechanisms. In this paper, the dynamic character of the bed structure of HTM40100 horizontal mill-turn compound machine center is researched by the finite elements method (FEM) in the circumstance of ANSYS, and modal analysis theory is introduced and applied. Bed structure is modeled as flexible body by FEM. The harmonic response and the modal results is given by calculation and running of the model in ANSYS. The bed structure of machine meets the technical demands well enough after those analyses.
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47

Vasilevich, Yu V., and S. S. Dounar. "FINITE ELEMENT ANALYSIS OF CENTRELESS-LUNETTE TURNING OF HEAVY SHAFT." Science & Technique 16, no. 3 (May 26, 2017): 196–205. http://dx.doi.org/10.21122/2227-1031-2017-16-3-196-205.

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Dynamics of huge renovated lathe is simulated. Turning scheme concerns to heavy rotor shaft finishing. Lofty parts and milling head may create dynamic problems. Static, modal and harmonic frequency response function simulations were provided. Bearing system consists of bed, support, tool, lunettes, tailstock. Headstock didn’t take part in shaft holding. Static and dynamic rigidities founded 3–4 times less for support than for shaft. Tool rigidity lessens from 186.5 to 11.9 N/µm for speeding from slow to near resonance turning. Twelve lathe eigenmodes were evaluated. Two eigenmodes are most dangerous. It is “shaft swinging on lunettes” (M1, 26.7 Hz) and “support pecking” (M3, 54.4 Hz). Bed has excessive flexibility due to through holes and lack of inner ribbing. Polymer concrete filling is moderately effective. Changing two-lunette (2L) scheme to three-lunette (3L) increases rigidity of shaft at 2.09 times at statics but gives limited action in dynamics. Resonant peaks on frequency response function are lowered only at 1.32 times for M1, M3. Effect of dynamic damping is revealed under condition of proximity middle lunette to lofty support. Support serves as tuned mass damper. Measures of machine tool reinforcement are simulated. Shaft swinging according to M1 may hardly be blocked by passive means. It would be better to bypass it. “Support pecking” resonance (M3) succumbs to only full set of measures. Small effect of partial reinforcement is predicted. Three frequency intervals are recommended for turn-milling at huge lathe: pre-resonant (<20 Hz), inter-resonant (35–45 Hz) and post-resonant (>65 Hz). The last one is more suited. Next design step is to create triangle inner ribbing system or caissons inside of bed.
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48

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 (August 9, 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 was established based on the machining features. The quality loss of the machine tool was also integrated into a single optimization objective. After identifying the relationship between the accuracy grade parameters of the feeding components and the geometric errors, the maximum in the Euclidean norm of all the accuracy parameters was defined as another optimization objective. The robust accuracy allocation was performed using Isight software and the Non-Dominated Sorting Genetic Algorithm-II built in the MATLAB. The optimization results for a four-axis horizontal machining center showed that the proposed method can realize the optimization of geometric accuracy and can determine the optimal accuracy grade of the feeding components satisfying the machining accuracy requirements.
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Jeong, Ji Hun, Gyungho Khim, Jeong Seok Oh, and Sung-Chong Chung. "Measurement of Location Errors in a Horizontal 4-axis Machine Tool using a Touch Trigger Probe." Journal of the Korean Society for Precision Engineering 36, no. 8 (August 1, 2019): 745–52. http://dx.doi.org/10.7736/kspe.2019.36.8.745.

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Zhao, Changyong, Yuanmeng Xia, Xuezhen Chen, Yunfeng Jiang, Yi He, Shilu Pan, and Ya Fei. "Thermal error detection and compensation technology for spindle of horizontal CNC machine tool with large torque." International Journal of Advanced Manufacturing Technology 107, no. 1-2 (February 12, 2020): 85–96. http://dx.doi.org/10.1007/s00170-020-05015-4.

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