Study of the Dynamic Characteristics of the CNC Machine Tool Which Guarantees the Flexible Manufacturing of Logistics

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.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.562-564.1352 ◽

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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The friction effects for contact force analysis of three-axes CNC machine tool

Industrial Lubrication and Tribology ◽

10.1108/ilt-02-2017-0045 ◽

2018 ◽

Vol 70 (8) ◽

pp. 1527-1535 ◽

Cited By ~ 1

Author(s):

Yunn-Lin Hwang ◽

Thi-Na Ta

Keyword(s):

Machine Tool ◽

Dynamic Characteristics ◽

Dynamic Structure ◽

Contact Forces ◽

Numerical Control ◽

Cnc Machine Tool ◽

Cnc Machine ◽

Static Structure ◽

Content Type ◽

Machine Tool Structure

Purpose The purpose of this paper is to study the influence of friction on static and dynamic characteristics, as well as the strength and lifetime of a flexible three-axes computer numerical control (CNC) machine tool. Design/methodology/approach The machine tool is first modeled by using finite element method to analyze static structure with frictionless surface-to-surface contact type. Because the machine tool structure is becoming more and more sophisticated over time, the significant influence of contact conditions between structural elements on the dynamic characteristics of the whole structure must be considered. To examine the dynamic effects caused by inertia forces and displacement of moving bodies on contact stress, the coefficient of friction between two contact bodies is added to perform dynamic simulation and compare the results with the static analysis results. Findings Distribution of stress and contact forces in solid-flexible contact is also studied by using the fundamental dynamic characteristics of a bushing joint. Originality/value Finally, the influence of dynamic structure, cutting conditions and material properties on the strength and lifetime of the CNC machine tool is discussed by using fatigue analysis. Consequently, this research can be used for efficient simulation of structural dynamics, lifetime assessment and interactions of the real CNC machine with the machine tool structure in a virtual environment.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.443-444.745 ◽

2012 ◽

Vol 443-444 ◽

pp. 745-750 ◽

Cited By ~ 1

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.

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Dynamic Characteristics Analysis for the Bed of CNC Machine Tool

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.37-38.370 ◽

2010 ◽

Vol 37-38 ◽

pp. 370-373

Author(s):

S.R. Zhang ◽

X.G. Li ◽

L.F. Yang ◽

B. Yu

Keyword(s):

Machine Tool ◽

Natural Frequency ◽

Dynamic Characteristics ◽

Pulse Excitation ◽

Cnc Machine Tool ◽

Cnc Machine ◽

Main Mode ◽

Characteristics Analysis ◽

Dynamic Characteristics Analysis ◽

Made In

The experimentation modal analysis is made in the bed of the CNC machine tool with the hammering method of the pulse excitation. Then the dynamic characteristics of this bed are studied and the natural frequency of the bed in the specified frequency band. It supplies a clear reference for the structured optimum design of the bed through the analysis of the main mode on every rank.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.507.217 ◽

2012 ◽

Vol 507 ◽

pp. 217-221 ◽

Cited By ~ 1

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.

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