Experiment-based thermal behavior research about the feed drive system with linear scale

Li, Yang; Zhang, Jun; Su, Dongxu; Zhou, Changxing; Zhao, Wanhua

doi:10.1177/1687814018812359

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…Such approach, being utilized to construct an updated kinematic command, aims at generating inverse errors with respect to the current original thermal positioning error [31]. Accordingly, the inputs and outputs are nominal coordinates in the feeding direction and the compensation coordinates, respectively [32][33][34]. Afterwards, the updated CNC codes are obtained through the compensation coordinates, based on which the thermal positioning errors are decreased or even eliminated due to the inverse errors.…”

Section: Compensations Of Thermal Positioning Errorsmentioning

confidence: 99%

A novel approach for decoupling and separating the thermal positioning errors of machining center linear axes

Yao¹,

Teng

Wang³

et al. 2023

Preprint

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CNC machining center linear axis thermal positioning errors, seen as the synthetic consequences of geometric and thermal errors, respectively generated due to the manufacturing and assembling inaccuracies and the asymmetric thermal deformation of the machining center structure, are significantly affected by varying position of the cutting point and shifting state of temperature field. Hence, developing a practical approach to reduce or even eliminate thermal positioning errors is crucial. This paper proposes a novel approach to decouple and separate machining center linear axis thermal positioning errors, based on which a highly accurate prediction model of the thermal positioning error is formulated. Firstly, a new concept on thermal positioning error sensitivity is presented where grey correlation analysis is borrowed to characterize the mapping between varying temperature fields and thermal positioning errors, according to which the sensor sensitivities and distributions are derived and optimized, respectively. Then, the thermal positioning errors are decoupled and separated into geometric and thermal errors by adopting multiple linear regression and GM (1, n) algorithms, respectively. Finally, the corresponding embedded compensation module is also developed within the SIEMENS 840D CNC system to realize the online compensation strategy providing the engineering applications. Experimental validations are performed on a commercial machining center, where the thermal positioning errors of the Z-axis are measured with the help of a laser interferometer testing kit and a thermal inspection instrument. The data comparisons indicate that the maximum thermal positioning errors of the Z-axis in the cold and warm state are respectively decreased for 86.5% and 71.6% after activating the compensation module, which also suggests that the proposed approach is adequate and accurate to decouple and separate the thermal positioning errors.

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Section: Compensations Of Thermal Positioning Errorsmentioning

confidence: 99%

A novel approach for decoupling and separating the thermal positioning errors of machining center linear axes

Yao¹,

Teng

Wang³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Consequently, it becomes imperative to incorporate a displacement sensor with high accuracy and a large detection range. Additionally, adherence to other requisites, such as compact size, ease of integration, robust stability, and cost-effectiveness, should be tailored to specific application scenarios [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A Self-Powered Flexible Displacement Sensor Based on Triboelectric Effect for Linear Feed System

Zhao,

Li,

Cui

et al. 2023

Nanomaterials

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The detection and feedback of displacement and velocity significantly impact the control accuracy of the linear feed system. In this study, we propose a flexible and self-powered displacement sensor based on the triboelectric effect, designed for seamless integration into linear feed systems. The displacement sensor comprises two parts, the mover and stator, operating in a sliding mode. This sensor can precisely detect the displacement of the linear feed system with a large detection range. Additionally, the sensor is capable of real-time velocity detection of linear feed systems, with an error rate below 0.5%. It also offers advantages, such as excellent flexibility, compact size, stability, easy fabrication, and seamless integration, with linear feed systems. These results highlight the potential of the self-powered displacement sensor for various applications in linear feed systems.

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“…Sun [26] presented a precision testing method called seven-sensor configuration method to measure the thermal errors of a horizontal machining center with linear optical grating scale. Li [27] tests the temperatures and positional deviations of the ball screw feed drive system and the linear motor feed drive system equipped with linear scales, and analyzes the factors that affect the positioning error. Then, the temperatures and positioning coordinates were used as inputs to build the thermally induced positional deviation model of full closed-loop feed drive system.…”

Section: Introductionmentioning

confidence: 99%

Analysis of thermal error model of ball screw feed system based on experimental data

Yang

et al. 2022

Int J Adv Manuf Technol

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In order to investigate the effect of thermal expansion on the ball screw feed system (BSFS) of a precision machine tool, theoretical modeling of and experimental study on thermally induced error are focused in this paper. A series of thermal experiments are conducted on the machine tool to measure the temperature of the main heat source and measuring points of BSFS. To classify the main heat sources and discuss the impact on the ball screw feed system separately. By the experimental data of ball screw system, the thermal model of screw shaft in the axial direction is analyzed and verified. Based on the heat generation and transfer analysis of ball screw system, thermal expansion of screw shaft in the axial direction is modeled mathematically. In addition, by analyzing the effects of machining parameters such as rotational speed, preloads and lead, we get the parameter influence of BSFS's temperature rising and thermal deformation. This work can help us reduce thermal deformation effectively, and improve the precision of CNC machining.

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Experiment-based thermal behavior research about the feed drive system with linear scale

Cited by 8 publications

References 18 publications

A novel approach for decoupling and separating the thermal positioning errors of machining center linear axes

A novel approach for decoupling and separating the thermal positioning errors of machining center linear axes

A Self-Powered Flexible Displacement Sensor Based on Triboelectric Effect for Linear Feed System

Analysis of thermal error model of ball screw feed system based on experimental data

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