Dynamic Characteristics of Guideway Joints for CNC Machine Tool

2011 ◽  
Vol 80-81 ◽  
pp. 1051-1054
Author(s):  
Chun Xia Zhu ◽  
Bin Li ◽  
Ji Man Luo
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
Optimization Design ◽  
Joint Stiffness ◽  
Element Model ◽  
Cnc Machine Tool ◽  
Regular Pattern ◽  
Cnc Machine ◽  
Harmonic Response ◽  
The Finite Element Model

In order to analyze accurately the dynamic characteristics of guideway joints of CNC, the finite element model(FEM) of guideway joints of CNC is built in ANASYS software, which that springs and damping units imitate guideway joints in this paper. The proposed method can predict the regular pattern which joint stiffness and joint span affect natural frequency and harmonic response. The research demonstrates that the method predicts well the dynamic characteristics of the guideway joints of CNC; therefore, it can be a reference for dynamic optimization design of guideway joints of CNC machine tool.

Modeling and Simulation of Dynamic Characteristics of the Linear Rolling Guide in Turn-Milling Centre

2011 ◽  
Vol 464 ◽  
pp. 358-361 ◽  
Author(s):  
Li Da Zhu ◽  
Wan Shan Wang ◽  
Jian Yu Yang ◽  
Tian Biao Yu
Keyword(s):  
Finite Element ◽  
Dynamic Optimization ◽  
Dynamic Characteristics ◽  
Optimization Design ◽  
Joint Stiffness ◽  
Design Stage ◽  
Regular Pattern ◽  
Harmonic Response ◽  
Rolling Guide ◽  
Turn Milling

In order to analyze accurately the dynamic characteristics of Linear Rolling Guide during the design stage, the Linear Rolling Guide that springs and damping units imitate joints is simulated by finite element methods in this paper. The proposed method can predict the regular pattern which joint stiffness and joint span affect natural frequency and harmonic response. The research demonstrates that the method predicts well the dynamic characteristics of the Linear Rolling Guide; therefore, it can be a reference for dynamic optimization design of Linear Rolling Guide in turn-milling center.

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.

Research on Thermal Characteristic of Spindle System of CNC Machine Tool

2012 ◽  
Vol 510 ◽  
pp. 23-27 ◽  
Author(s):  
Zhong Qi Sheng ◽  
Zong Xiao Zhu ◽  
Chang Chun Liu ◽  
Chao Biao Zhang
Keyword(s):  
Machine Tool ◽  
Thermal Characteristic ◽  
Thermal Error ◽  
Element Model ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Spindle System ◽  
Turning Center ◽  
Machine Spindle ◽  
Steady Temperature Field

The main heat source of the spindle system of CNC machine tool has been analyzed. The friction heat of the motor as well as the bearing has been calculated. This paper established the finite element model of the spindle system of a precise CNC turning center, and used ANSYS to analyze the steady temperature field of the spindle system and the thermal deformation of the spindle. Finally, this paper proposed a solution to install a cooling sleeve in front of the spindle box, which can apparently reduce the thermal error of machine spindle.

Analysis of Dynamic Characteristics of Space Deployable Antenna Based on ANSYS

2010 ◽  
Vol 37-38 ◽  
pp. 127-130
Author(s):  
Da Ke Tian ◽  
Rong Qiang Liu ◽  
Zong Quan Deng ◽  
Hong Wei Guo
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Optimization Design ◽  
Element Model ◽  
Truss Structure ◽  
Vibration Modes ◽  
Ansys Software ◽  
Dynamic Modification ◽  
The Finite Element Model

Analysis of dynamic characteristics is one of the important parts of structure analysis for space deployable antenna. In order to study the dynamic characteristics of truss structure for space deployable truss antenna, according to the structure composition, the finite element model of truss structure is built by using ANSYS software, and the modal analysis is carried out by finite element method, then the natural frequencies and the features of vibration modes are obtained. It is emphatically analyzed that the influence of structure parameters such as chords, vertical beams, diagonal beams and crossing cables on the first natural frequency, and the change curves of natural frequency are given. The results can provide the theoretical basis for the antenna’s structural optimization design and dynamic modification.

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.

Dynamic Characteristic Calculation of CNC Machine Tool’s Base Based on FEM

2013 ◽  
Vol 546 ◽  
pp. 20-24
Author(s):  
Xiao Lei Deng ◽  
Jian Chen Wang ◽  
Zhao Zhong Zhou
Keyword(s):  
Machine Tool ◽  
Optimization Design ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Nc Machine Tool ◽  
Structural Improvement ◽  
Nc Machine ◽  
Complete Calculation ◽  
Main Component ◽  
Safety Operation

Base is a main component of CNC machine tool, so its dynamic characteristics impact on machine tool’s machining precision and stability directly. However, the traditional analytic way cannot finish the accurate and complete calculation and analysis. So it is very necessary to make FEM dynamics research on base of machine tool. This paper employs FEM modal analysis to research the free vibration of base which is undamped. And then we can get the nature frequencies of the base’s first six modal, there are 407.79 Hz, 430.47 Hz, 501.23 Hz, 623.63 Hz, 626.51 Hz and 661.19 Hz, respectively. In addition, the first six modal shapes are also obtained. The forth frequency and the fifth frequency are much closed, so they can be considered the multiple roots for the vibration equation. The research results can provide theoretical basis for fault diagnosis，safety operation and vibration control，and the important parameters are useful for structural improvement and optimization design of the NC machine tool．

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.

Research and Development of a CNC Machine Tool Dynamic Characteristics Test and Analysis System

2012 ◽  
Vol 562-564 ◽  
pp. 1352-1357
Author(s):  
Kai Tian ◽  
Qiang Liu ◽  
Song Mei Yuan ◽  
Yi Qing Yang
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
Function Analysis ◽  
Cutting Parameters ◽  
Parameters Optimization ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Function Modules ◽  
Analysis System ◽  
Cutting Parameters Optimization

A dynamic characteristics test and analysis system for CNC machine tool is developed based on C++/Qt platform and NI-DAQmx data acquisition driver. The function modules include hammer experiment, signal continuous acquisition, spectral analysis, frequency response function analysis and signal coherence analysis, etc. The analysis results provide the basis of dynamics characteristics simulation and cutting parameters optimization. The system can be also used to analysis the vibration of the cutting process. Spectrum analysis modules help to assess the cutting stability and diagnose problems. Experiments show that the system has good accuracy and efficiency while the size and price are decreased compare with traditional equipment.

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