Experimental and numerical study of the load distribution in a ball-screw system

Bertolaso, Romuald; Cheikh, Mohammed; Barranger, Yoann; Dupré, Jean-Christophe; Germaneau, Arnaud; Doumalin, Pascal

doi:10.1007/s12206-014-0128-0

Cited by 44 publications

(17 citation statements)

References 16 publications

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“…1). It can be assumed that the component where the load is applied is the displaced one (in this case the screw), while the other stays fixed (in this case the nut) [3,18,17]. The three mentioned centers remain in a single line, with a common pressure angle for both contacts.…”

Section: Implementation Of Ccm In a Fem Modelmentioning

confidence: 99%

“…Increasing the number of balls by increasing the number of circuits leads to long length nuts. Further it has been identified that the distance between the first and the last loaded ball affect the strain distribution between the screw shaft and the nut and, therefore, the ball load distribution [16,3].The characterization of the load distribution of ball screws has been the object of study lately, by both experimental and numerical means. Early work performed by Shimoda and Izawa [12], in 1977, involve some experimental tests using a 2D prototype where an uneven load distribution along the nut was observed.…”

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confidence: 99%

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confidence: 99%

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Numerical Characterization of the Load Distribution in Ball Screws

Sangalli

Oyanguren

Larrañaga

et al. 2021

Preprint

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Load distribution in ball screws is a representation of the ball contact stress, and it is fundamental to understanding the behavior of these machine elements. This work aims to conduct a multi-variable analysis of the load distribution in ball screws. For this purpose, a numerical tool is developed for the generation and calculation of ball screw FEM models, which has been validated against the state of the art. Many different design variables are studied in order to obtain a general characterization of the morphology of the load distribution in ball screws. The two most characteristic features, the non-uniformity at a local and global level are identified, along with as the possible causes of their appearance and the consequences that they may cause.

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Section: Implementation Of Ccm In a Fem Modelmentioning

confidence: 99%

mentioning

confidence: 99%

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Numerical Characterization of the Load Distribution in Ball Screws

Sangalli

Oyanguren

Larrañaga

et al. 2021

Preprint

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show abstract

“…Yoshida et al 10 proposed a novel finite element model to study the inconsistent distribution of contact stress, and the low order finite element model had been employed in studying the ball screw, including the static load distribution. 11,12 Bertolaso et al 13 had detected the static load of all balls by applying experimental set-ups where the screw and the nut were simplified to two-dimensional plates. Only axial load is applied on the ball screw under the standard installation.…”

Section: Introductionmentioning

confidence: 99%

A novel approach to predict the precision sustainability of ball screw under multidirectional load states

Zhao

Lin

Song

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The accurate model of the load state for all balls under multidirectional load is very helpful for the design process of ball screws. The contact deformation model of the ball screw without consideration of the stress difference of all balls is inaccurate. In this paper, a novel contact load model of the ball screw is established by considering coupled axial, radial load to study the elastic deformation displacement and position accuracy. The deviation and variation of axial elastic deformation with the dimension errors of all balls are investigated to obtain the influence of load state on the precision sustainability of the ball screw. The position precision including travel deviation and variation by considering load distribution of all balls is studied under the different load conditions. In addition, a new working bench is designed to study the position precision of the ball screw. The experimental study is carried out to obtain the relationship between the position precision and the contact load state of all balls, which is a reference to compensate for the precision loss of the ball screw.

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“…It was assumed that the normal force of the contact pair in every half lead was the same, and the phenomenon could be found from the computational results that load distribution was uneven with the unit of half a lead. Bertolaso et al [3] verified the ball screw nut pair's uneven distribution, through photoelasticity, tag tracking and the FEM numerical method based on the half lead model. However, the models proposed by the above scholars cannot describe the contact state of the whole ball-raceway pairs, and the research on the screw nut is still in the stage of static analysis.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Dynamic Contact Characteristics and Dynamic Stiffness Estimating Method of Single Nut Ball Screw Pair Based on the Whole Rolling Elements Model

Chen

Zhao

et al. 2020

Applied Sciences

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The purpose of this paper is investigating the characteristics of dynamic contact and dynamic stiffness of the single nut ball screw pair (SNBSP). Then a new sensorless method is proposed to extract the SNBSP dynamic contact stiffness of a mass production CNC machine tool feed system. First of all, the transformation relationship between each coordinate system of SNBSP is established. Secondly, the dynamic model of all ball–raceway contact pairs is established. Based on this, a dynamic contact stiffness model is established. The dynamic contact parameters are obtained by the numerical method. It is found that the influence of screw speed on screw and nut raceway normal force distribution are opposite. This will affect the variations of dynamic contact stiffness. It is also clear that the effect of axial load on dynamic stiffness is significant. Then, an effective method is proposed to estimate the dynamic contact stiffness of a mass production CNC machine tool feed system without any external sensors. The axial force of feed system is estimated by using torque current of servo motor. Current signals can be obtained through FANUC Open CNC API Specifications (FOCAS) library functions, and then dynamic contact stiffness can be calculated through the stiffness model without external sensors. Finally, a feed system dynamic model is built, and the contact model and sensorless stiffness estimating method are verified by experiments in this dynamic system.

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Experimental and numerical study of the load distribution in a ball-screw system

Cited by 44 publications

References 16 publications

Numerical Characterization of the Load Distribution in Ball Screws

Numerical Characterization of the Load Distribution in Ball Screws

A novel approach to predict the precision sustainability of ball screw under multidirectional load states

Analysis on Dynamic Contact Characteristics and Dynamic Stiffness Estimating Method of Single Nut Ball Screw Pair Based on the Whole Rolling Elements Model

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