Characteristic Analysis and Optimization of CNC Machine Tool Spindle Based on Finite Element Method

2012 ◽  
Vol 507 ◽  
pp. 217-221 ◽  
Author(s):  
Zhong Qi Sheng ◽  
Sheng Li Dai ◽  
Yu Chang Liu ◽  
Hua Tao Fan
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Static And Dynamic Characteristics ◽  
Machine Tool Spindle

Relying on HTC3250µn and HTC2550hs high-speed precision CNC turning center, this paper analyzes the static and dynamic characteristics of CNC machine tool spindle with finite element analysis software. Based on the results and using ANSYS software, this paper considers the volume and amplitude of vibration model as the objective function to optimize the size of the spindle. According to the optimized size of spindle, this paper analyzes the static and dynamic characteristics of the CNC machine tool spindle again and concludes the optimization results.

Structural investigation of steel-reinforced epoxy granite machine tool column by finite element analysis

2019 ◽  
Vol 233 (11) ◽  
pp. 2267-2279 ◽  
Author(s):  
Prabhu Raja Venugopal ◽  
M Kalayarasan ◽  
PR Thyla ◽  
PV Mohanram ◽  
Mahendrakumar Nataraj ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cast Iron ◽  
Machine Tool ◽  
Dynamic Characteristics ◽  
Element Model ◽  
Static Stiffness ◽  
Element Analysis ◽  
Static And Dynamic Characteristics ◽  
Machining Center

Higher damping with higher static stiffness is essential for improving the static and dynamic characteristics of machine tool structures. The structural vibration in conventional machine tools, which are generally made up of cast iron and cast steel, may lead to poor surface finish and the dimensional inaccuracy in the machined products. It leads to the investigation of alternative machine tool structural materials such as concrete, polymer concrete, and epoxy granite. Although epoxy granite has a better damping capacity, its structural stiffness (Young's modulus) is one-third as compared to cast iron. Therefore, the present work represents optimization of the structural design of the vertical machining center column by introducing various designs of steel reinforcement in the epoxy granite structure to improve its static and dynamic characteristics using experimental and numerical approaches. A finite element model of the existing cast iron vertical machining center column has been developed and validated against the experimental data obtained using modal analysis. Furthermore, finite element models for various epoxy granite column designs have been developed and compared with the static and dynamic characteristics of cast iron column. A total of nine design configurations for epoxy granite column with steel reinforcement are evolved and numerical investigations are carried out by finite element analysis. The proposed final configuration with standard steel sections has been modeled using finite element analysis for an equivalent static stiffness and natural frequencies of about 12–20% higher than cast iron structure. Therefore, the proposed finite element model of epoxy-granite-made vertical machining center column can be used as a viable alternative for the existing column in order to achieve higher structural damping, equivalent or higher static stiffness and, easy and environmental-friendly manufacturing process.

Dynamic Characteristic Analysis and Validation of Spindle Assembly of High Speed Machine Tool

2009 ◽  
Vol 407-408 ◽  
pp. 135-139
Author(s):  
Yao Man Zhang ◽  
Xiu Li Lin ◽  
Chun Shi Liu ◽  
Guang Qi Cai
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Spindle Assembly ◽  
Analysis Model ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
High Speed Machine

To design a machine tool successfully, its essential parts should be analyzed and evaluated after design but before prototype being made. The spindle assembly is one of the most essential parts of high speed machine tool, so how the dynamic characteristics of the spindle assembly affect the performance of high speed NC machine tool are of great significance and should be studied. This paper’s research is based on a high speed machine tool manufactured by some plant. The finite element analysis model of the spindle assembly of the high speed machine tool was developed by taking the advantage of the spring-damper element to simulate the bearing supports. The modal analysis was made to confirm the dynamic characteristics of the spindle assembly, and the results were compared with the testing ones.

Finite Element Analysis of Milling Head Box of CNC Machine Tool

2012 ◽  
Vol 605-607 ◽  
pp. 1519-1522
Author(s):  
Lei Sun ◽  
Xia Wang
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Response Analysis ◽  
Optimized Design ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Element Analysis ◽  
Harmonic Response ◽  
Harmonic Response Analysis ◽  
Vibration Modal

The modal analysis and harmonic response analysis of milling head box were done by means of finite element method. Find out its characteristics of vibration modal. The analysis is conducive to the design of the milling head box of machine tool. It makes a base for optimized design and remanufacturing.

The Analysis on Dynamic Characteristics and the Structural Optimization of HRG Polishing Machine Tool

2013 ◽  
Vol 770 ◽  
pp. 54-58 ◽  
Author(s):  
Ming Jun Chen ◽  
Lin Yu ◽  
He Nan Liu ◽  
Wan Qun Chen
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Element Model ◽  
Machining Accuracy ◽  
Cnc Machine ◽  
Element Analysis ◽  
Dynamic Performances ◽  
Supporting Frame

The dynamic characteristics of machine tool directly affect machining accuracy of the final parts. Taking the self-developed HRG ultra-precision polishing CNC machine tool as the research object, the simplified finite element model is established with the finite element analysis software to do the dynamic analysis and the natural frequency is detected as the index of the dynamic performances. Based on the comparative analysis of the natural frequency and vibration modes, the gantry and the supporting frame are recognized as structural weaknesses of the machine tool, and then the modal test is done to verify simulation results. Eventually the structural weaknesses are optimized effectively. The 1st order nature frequency of the optimized gantry and the optimized supporting frame is increased 75.5% and 80.8% respectively so that they have better dynamic performances, resulting in offering higher workpiece quality and process stability.

Finite Element Analysis of Static and Dynamic Characteristics of High-Speed Horizontal Machining Center Bed

2014 ◽  
Vol 889-890 ◽  
pp. 58-61 ◽  
Author(s):  
Peng Wang ◽  
Yan Rui Zuo ◽  
Li Na Ren ◽  
Dong Dong Song
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Lightweight Design ◽  
Element Analysis ◽  
Static And Dynamic Characteristics ◽  
Machining Center ◽  
Analysis Theory ◽  
Work Area

Based on the theory of finite element and modal analysis theory, analysis of static and dynamic characteristics of the lathe bed has been done. The static displacement contours and mode natural frequency and displacement contours have been given to realize the structure optimization of lathe bed of high-speed horizontal machining center. It is shown that the bed has good static stiffness and natural frequency and the deformation of lathe bed mainly occurred in the tray conversion mechanism and the cutter location. The deformation of processing work area is small and has certain light weight space, which lay the foundation for the lightweight design of the bed.

Static and Dynamic Characteristic Analysis for the HSR Series Linear Motion Guide

2013 ◽  
Vol 834-836 ◽  
pp. 1488-1492
Author(s):  
Yao Man Zhang ◽  
Ren Jun Gu ◽  
Guang Xiao Yang
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Dynamic Characteristic ◽  
Dynamic Characteristics ◽  
Linear Motion ◽  
Characteristic Analysis ◽  
Static And Dynamic Characteristics ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
Linear Motion Guide

The dynamic characteristic of junction surface is an important part of the dynamic characteristics of NC machine tools, and it is sometimes the weakest link of the machine tool's dynamic characteristics. The precision of the finite element calculation of the machine tool's dynamic characteristics shall be affected by the junction surface parameters directly. Linear Motion guide is one of the most widely used components of the NC machine tool, and its characteristic is one of the most important components of the performances of the NC machine tool. The HSR series of linear motion guides are taken as the object of the paper, and its static and dynamic characteristics are studied. And the parameters of static and dynamic characteristics of HSR, such as static stiffness, natural frequency and modal shape are obtained. The accuracy of the finite element analysis mode is verified, which establishes the foundation for the dynamics analysis of machine tool.

Finite Element Analysis of Moving Trestle of CNC Machine Tool

2011 ◽  
Vol 361-363 ◽  
pp. 1553-1556
Author(s):  
Lei Sun ◽  
Ming Hai Wang ◽  
Xiao Peng Li ◽  
Yue Sun
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Response Analysis ◽  
Optimized Design ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Element Analysis ◽  
Harmonic Response ◽  
Harmonic Response Analysis ◽  
Vibration Modal

Taking moving trestle of machine tool as example,the modal analysis and harmonic response analysis were done by means of finite element method. Find out its characteristics of vibration modal. The analysis is conducive to the design of the moving trestle of machine tool. It makes a base for optimized design and remanufacturing.

scholarly journals A method of thermal error prediction modeling for CNC machine tool spindle system

2021 ◽  
Author(s):  
Wenjie Cao ◽  
Haolin Li ◽  
Qiang Li
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Prediction Model ◽  
Machine Tool ◽  
Thermal Error ◽  
Error Prediction ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Spindle System ◽  
Machine Tool Spindle

Abstract In order to improve the machining accuracy of the thermal error prediction model of CNC machine tools, a new method for calculating the position of the measuring points optimal combination researched on linear correlation is proposed, according to the thermal-mechanical finite element analysis(FEA) model of spindle system established after analyzing the thermal characteristics of heat source temperature field of CNC machine tool spindle system. Based on the correlation analysis(CA) of the finite element model of heat source temperature field of CNC machine tool spindle system, combined with the concept of mutual information (MI), this method measures the information of the measurement point variables including the thermal error variables and uses principal component analysis (PCA) to eliminate the collinearity effect within measuring point variables. By using multilinear regression(MR), The thermal error prediction model(CAMI-PCAMR) is established. The accuracy of the prediction model is verified by comparing the actual measurement thermal error with the predicted thermal error through the experimental measurement and analysis of the thermal error of the CNC end grinder test machine tool system. That the axial prediction accuracy of this method can reach 1.099 \(\mu m\), and the prediction radial accuracy can reach 1.28 \(\mu m\) under the variable ambient condition, so as to provide parameters and theoretical guidance for embedding temperature sensors in the machine tool to compensate thermal error in the design stage. And the experimental results also show that the CAMI-PCAMR method is superior to the gray correlation and fuzzy clustering(FC-GCA) modeling method.

Analysis on Dynamic Characteristics of CNC Machine Tool and Experiment with Influence of Rolling Guide Joint Considered

2012 ◽  
Vol 443-444 ◽  
pp. 745-750 ◽  
Author(s):  
Xiao Peng Li ◽  
Hui Fan Nie
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Great Influence ◽  
Element Model ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Rolling Guide ◽  
Vibration Modal

The 3D finite element model of CAKxxx CNC machine tool is established and the static/dynamic characteristics of the machine tool are analyzed with finite element method when the influence of the linear rolling guide (LRG) joint is considered or neglected. The lowest five natural frequencies and vibration modal shapes are obtained in both cases. It shows that when considering the influence of the LRG joint, each of the lowest five natural frequencies is 14 Hz smaller than the results of neglecting the influence, and the vibration modal shapes are more stable. The modal experiment shows that the results of considering the influence of the LRG joint are closer to the actual situation. It also proves that LRG joint has great influence on the dynamic characteristic of the machine tool. It provides an important reference for accurate modeling and dynamic design of machine tool.

Sign in / Sign up

Export Citation Format

Share Document