Generalization of the tetraparametric assembly method for the optimization of bolt tightening sequences in ring-type joints

Coria, Ibai; Abasolo, Mikel; Aguirrebeitia, Josu; Bustos, Igor Fernández de

doi:10.1177/0954408918821223

Cited by 5 publications

(7 citation statements)

References 18 publications

(40 reference statements)

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“…Coria et al. 5,6 obtained the uniform final load distribution of ring type joints in one-pass tightening sequence and two-pass tightening sequences and verified the accuracy of the two methods by FEA and experimental tests. Nassar et al.…”

Section: Introductionmentioning

confidence: 85%

Investigation on bolt initial tensioning of inner-diameter saw blade

Pei

Wang

Zhang

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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Inner-diameter slicing based on a thin inner-diameter saw blade is one of the main hard and brittle material slicing methods. The inner-diameter saw blade needs to be tensioned for increasing its slicing stiffness and stability before working, and the tensioning quality affects the performance of subsequent material slicing directly and severely. In this paper, through finite element theoretical simulation and specialized experimental testing, the tensioning operation schemes are investigated systematically in the view of tensioning state and quality of the inner-diameter saw blade. By including mechanical equipment and electrical instruments, a specialized automatic experiment system is designed and manufactured with control and measurement function. Effects of bolts pre-tightening force, tightening sequence and rounds, and tensioning amount on the inner-diameter saw blade cutting-edge unevenness, lateral thrust stiffness, and transversal vibration response are investigated by theoretical simulation and experimental observation. A guideline on the optimization and improvement of initial tensioning is proposed for the inner-diameter saw blade practical engineering production.

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Section: Introductionmentioning

confidence: 85%

Investigation on bolt initial tensioning of inner-diameter saw blade

Pei

Wang

Zhang

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Then, the relationship between axial preload of the bearing and the axial displacement δ a can be obtained by replacing equation (7) and equation ( 21) into equation (20).…”

Section: In the Bearingmentioning

confidence: 99%

“…Due to the recommended tightening sequence, it is usually complicated and still needs to be optimized. 19 In this sense, different optimization methodologies have been developed to obtain more efficient tightening patterns, 20 which are realized by accurately calculating the preload variations during the tightening process. Elastic interaction coefficient method (ECIM) 21 and inverse sequence method (ISM) 22 are sometimes used to optimize the tightening sequence.…”

Section: Introductionmentioning

confidence: 99%

Assembly method for two symmetrical bolt-bearing joints based on the tightening model and angle-eccentricity relationship

Fang

Luo

Xin

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper focused on the assembly of two symmetrically distributed bolt-bearing joints, both the single bolt tightening control and two bolts adjusting were studied. An improved assembly method for two annular parts connected by these two bolt-bearing joints was proposed to improve the tightening quality of these joints and the eccentricity between these two annular parts. First, the tightening process of single bolt-bearing joint was analyzed, and the mathematical model of the tightening process was established. Then, aiming to improve the tightening quality, an improved tightening control method for single bolt-bearing joint was proposed based on the mathematical model. Finally, the angle-eccentricity relationship was studied, and the eccentricity adjustment strategy based on the inverse sequence method was presented for adjusting the eccentricity between two connected parts. Considering that the measurement of the bearing preload is not convenient, the eccentricity was measured for indirectly reflecting the preload. The tightening experiments verified that the scatter of preload was obviously reduced under the improved tightening control method. The results of eccentricity adjustment experiments indicate that the eccentricity reduce gradually during the loosening and tightening process, and the eccentricity is less than 3.4 μm after adjustment process, which enough to meet the assembly requirements of the target groupware.

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“…The required pre-tightening force of the bolts is calculated in the multi-pass tightening process. Coria et al 14,15 proposed a tetraparametric assembly method for the tightening strategy of ring-type joints, as an improvement to the regular elastic interaction coefficient method, which can significantly increase the efficiency of multi-bolt tightening. A circular beam theoretical analysis model was proposed by Zhu et al 16 to simulate the elastic interaction during bolted flange tightening.…”

Section: Introductionmentioning

confidence: 99%

A multi-bolt tightening method based on elastic interaction coefficient and gasket creep relaxation

Zheng

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Flange connections are widely used in various mechanical components. The most important purpose of tightening for flanged bolts is to achieve designed clamping force for the maintenance of overall performance. In this work, a multi-bolt tightening algorithm is proposed based on elastic interaction coefficient and gasket creep relaxation. Firstly, dispersion of the individual bolt clamping forces for torque control method is considered in the algorithm. Relationship between the nut factors of the flange bolts in multi-pass tightening is established through experiment. Subsequently, the elastic interaction coefficient matrix was updated during the multi-pass tightening process to reduce the error. Two cases, without gasket and silicone gasket, are considered in the multi-bolt tightening experiment. Without gasket, the elastoplastic deformation at the initial stage after tightening will also cause a loss of clamping force. When using gasket, the clamping force loss due to gasket creep relaxation is more pronounced. Through experimental verification, the proposed multi-bolt tightening algorithm are able to achieve the target range of designed clamping forces and reduce its dispersion. Finally, the main influencing factors of the multi-bolt tightening are analyzed to provide a reference for the design of flange connections.

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Generalization of the tetraparametric assembly method for the optimization of bolt tightening sequences in ring-type joints

Cited by 5 publications

References 18 publications

Investigation on bolt initial tensioning of inner-diameter saw blade

Investigation on bolt initial tensioning of inner-diameter saw blade

Assembly method for two symmetrical bolt-bearing joints based on the tightening model and angle-eccentricity relationship

A multi-bolt tightening method based on elastic interaction coefficient and gasket creep relaxation

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