Investigation of load distribution and deformations for ball screws with the effects of turning torque and geometric errors

Zhao, Jiajia; Lin, Mingxing; Song, Xianchun; Guo, Qizhen

doi:10.1016/j.mechmachtheory.2019.07.006

Cited by 48 publications

(27 citation statements)

References 21 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%

“…In addition to this model validation, results from the CCM on ball screws are compared with cases presented in existing literature. Three load distribution study cases are chosen for this purpose: Okwudire's Case study 1 [7], Wei's heavy load ball screw [14] and Zhao's numerical calculation [17].…”

Section: Validation Process Of the Equivalent Fem Modelmentioning

confidence: 99%

“…In this case, the r parameter is higher than previous case, as shown by the downward form of the curve. The s parameter and, therefore, the non-uniformity at the local level, even though it is also high, loses relevance as it is much lower than the non-uniformity at the global level Lastly, Zhao's numerical calculation [17] studies the effects of turning torque on a medium nut (3 turns). Both the axial load and the turning torque are applied to the screw and the nut is fixed.…”

Section: Ball Screw Model Validationmentioning

confidence: 99%

“…This phenomenon and its effect combined with geometry errors was studied in more detail by Zhen and An [18]. Lastly, Zhao et al [17] added the effect of the turning torque caused by assembly errors in their model. In addition, Wei and Kao [14] presented their model focusing on high load cases.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Numerical Characterization of the Load Distribution in Ball Screws

Sangalli

Oyanguren

Larrañaga

et al. 2021

Preprint

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Section: Implementation Of Ccm In a Fem Modelmentioning

confidence: 99%

Section: Validation Process Of the Equivalent Fem Modelmentioning

confidence: 99%

Section: Ball Screw Model Validationmentioning

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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“…To date, studies on the precision loss of ball screws due to sliding and rolling motion have typically focused on kinematic and static analyses [1][2][3][4][5][6] or creep theory [7,8]. By combining sliding motion analysis with Archard theory [9], a ball screw precision loss model for analyzing sliding motion behavior was previously established [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Optimization Analysis of Structural Parameters for Ball Screw Precision Retention Based on Advanced Neural Fuzzy Network

Cheng

Liu

et al. 2020

IEEE Access

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Ball screws are used as precision transmission components in a wide range of industries. The combination of sliding/rolling motion can influence the degree of precision degradation of the ball screw. Optimization analysis of structural parameters can reduce precision loss and improve precision retention. This paper presents an optimization analysis of the ball screw to improve precision retention under mixed sliding-rolling motion. Precision loss of the ball screw due to mixed sliding-rolling motion was calculated. In addition, the effects of operating conditions and structural parameters on the precision loss were analyzed. Factors affecting precision loss of the ball screw under mixed motion were determined and the objective function to characterize precision retention was established according to imposed constraints. Structural parameter optimization of the ball screw based on an advanced neural fuzzy network can reduce the average rate of precision loss by approximately 18.36% and improve precision retention.

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Numerical characterization of local and global non-uniformities in the load distribution in ball screws

Sangalli

Oyanguren

Larrañaga

et al. 2021

Int J Adv Manuf Technol

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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 finite element (FE) models, which has been validated against the state of the art. This tool is based on the combination of an analytical contact model and the use of high-order FE models for the analysis of the load distribution of ball screws and stands out for its accuracy (less than 1% error against high-order FE models), adaptability, versatility (models are generated with more than 20 design variables and they can be introduced as components in larger models) and efficiency (being the computational time 1.25% of that of a high-order FE models) with respect to other existing models. Many different design variables (number of start threads, pitch, contact angle, ball size, slenderness and load arrangement) are studied in order to obtain a general characterization of the morphology of the load distribution in ball screws. Among them, the most influential variables on the load distribution and therefore on the structural behavior of ball screws are, load arrangement (with ratio r variations of up to 25% on the same ball screw) and slenderness (with ratio variations of up to 13% on ball screws with two turns of difference). 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.

show abstract

Investigation of load distribution and deformations for ball screws with the effects of turning torque and geometric errors

Cited by 48 publications

References 21 publications

Numerical Characterization of the Load Distribution in Ball Screws

Numerical Characterization of the Load Distribution in Ball Screws

Optimization Analysis of Structural Parameters for Ball Screw Precision Retention Based on Advanced Neural Fuzzy Network

Numerical characterization of local and global non-uniformities in the load distribution in ball screws

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