Research on thermal dynamics characteristics and modeling approach of ball screw

Xia, Junyong; You-min, HU; Wu, Bo; Shi, Tielin

doi:10.1007/s00170-008-1723-y

Cited by 20 publications

(5 citation statements)

References 15 publications

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“…In high-speed precision feed system, the thermal positioning errors are mainly three types: axial thermal error, radial thermal error, and backhaul thermal error [27]. According to ISO 230-2 and ISO 230-3, the axial thermal positioning error is mainly focused in this paper.…”

Section: Thermal Positioning Error Of Feed Systemmentioning

confidence: 99%

Temperature distribution and thermal error prediction of a CNC feed system under varying operating conditions

Jin

2014

Int J Adv Manuf Technol

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In high-speed and high-precision feed systems, the thermal errors are mainly caused by the non-uniform temperature variations and time-varying thermal deformations under different operating conditions. The research work undertaken herein ultimately aims to develop a generic method which is capable of evaluating the temperature rises of heat sources (such as supporting bearings and ball screw nut) and thermal positioning error of the feed system induced by varying operating conditions (feed speed, cutting load, and preload of ball screw). Experiments were carried out on a high-speed feed system experimental bench, and the influences of operating conditions on temperature rises of supporting bearings and ball screw nut were analyzed. Based on wavelet neural network and NARMA-L2 model, the relationship between temperature rise of supporting bearings and operating conditions was established. Furthermore, with the temperature of ball screw nut set to be a moving heating source load, the temperature and thermal deformation distributions of ball screw under bearings and ball screw nut heat sources were simulated. The experiment and simulation results show that the recommended modeling method can be used to predict thermal positioning errors of feed system with good accuracy. The work described lays a solid foundation of thermal error prediction and compensation in a feed system under varying operating conditions.

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Section: Thermal Positioning Error Of Feed Systemmentioning

confidence: 99%

Temperature distribution and thermal error prediction of a CNC feed system under varying operating conditions

Jin

2014

Int J Adv Manuf Technol

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“…(8) According to the theory on the coefficient calculation of convection heat transfer of a flat plate when air flows on it, the coefficient of convection heat transfer of spindle surface can be computed by (8).…”

Section: ) Boundary Layer Of Laminar Flowmentioning

confidence: 99%

“…Zhao Haitao simulated the spindle of CNC machine tool and got satisfying result, as in [7]. Xia Junyong did some researches on thermal dynamic characteristics and modeling approach of ball screw, as in [8]. Xu Min developed an improved thermal model for machine tool bearings, as in [9].…”

Section: Introductionmentioning

confidence: 99%

An improved thermal simulation model for the spindle of CNC machine tool

Sun

Yang

et al. 2010

2010 International Conference on Mechanic Automation and Control Engineering

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The spindle is an important part of a CNC machine tool, and it is very significant to study how to simulate the deformation of the spindle accurately no matter in theoretical or practical way. Traditionally, the boundary coefficients for simulation have always been defined as some constants with the help of personal experience. This is the main reason for inaccuracy in the thermal model deducing. Referencing the theory on calculation of the heat transfer convection coefficient on a flat plate when air flows along it, this paper proposes a new calculating method on the boundary coefficients. The heat transfer convection coefficients of a rotating spindle are deduced theoretically along with the change over time, and they are the attenuation function against time. Moreover, the dynamical characteristics of the spindle have also been analyzed using the FEM (finite element method). The relationship between temperature of point on spindle and thermal error has been investigated and some satisfying results are achieved at last. Keywords-machine tool; finite element method; boundary coefficient; thermal errorI.

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“…In recent years, plenty of studies have been conducted on the thermal behavior, temperature distribution, and thermal error analysis of ball screws. Xia et al [3] put forward a dynamics characteristic thermal deformation model of the ball screw according to the least square system identification theory and proved the correctness and validity of the model by simulation data. Min et al [4] developed a thermal model by the finite element method to investigate the temperature distribution in a ball screw feed drive system.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Thermal Elongation of the Ball Screw Mechanism under Various Rotational Speeds

Zhang

Feng

2021

Int. J. Precis. Eng. Manuf.

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In numerical control machines, the thermal elongation of the ball screw influences the position accuracy. Different rotational speeds lead to different temperature changes at different positions in a ball screw system. In this paper, a new method is proposed to calculate the temperature rise of different positions when the ball screw is in the thermal equilibrium state. The thermal transmission of ball screws is analyzed, and the heat generation and transfer coefficient are calculated based on the laws of thermodynamics. The function between the temperature rise and position is built by solving the thermal equilibrium differential equations. The thermal elongation is obtained after the temperature rise is calculated. In order to prove the validity of this model, a series of detection tests are conducted to obtain the temperature rise of a ball screw and the thermal elongation under different rotational speeds. The experimental results show that the realistic temperature rise and the thermal elongation agree well with the theoretical values.

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Research on thermal dynamics characteristics and modeling approach of ball screw

Cited by 20 publications

References 15 publications

Temperature distribution and thermal error prediction of a CNC feed system under varying operating conditions

Temperature distribution and thermal error prediction of a CNC feed system under varying operating conditions

An improved thermal simulation model for the spindle of CNC machine tool

Prediction of the Thermal Elongation of the Ball Screw Mechanism under Various Rotational Speeds

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