Pure Bending Equivalent Principle for Over-bend Straightening and Its Experimental Verification

Zhao, Jun Tian

doi:10.3901/jme.2012.08.028

Cited by 12 publications

(5 citation statements)

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“…It can be drawn from the data in Table 2 that the error between the theoretically calculated data and the simulated data is very small, which can prove the correctness of the theoretical model. In order to prove the correctness of the calculation results of the theoretical straightening stroke model, an experimental study is carried out for the D-type shaft specimen [24]. In the current experiment, the testing machine in Figure 16 is used to simulate the straightening process.…”

Section: Simulation Resultsmentioning

confidence: 99%

A General Stroke-Based Model for the Straightening Process of D-Type Shaft

et al. 2020

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D-type shaft is widely used in precision machinery products such as motors and intelligent robots. The straightness of the D-type shaft is an important factor influencing its machining accuracy and dynamic performance, which is normally improved by the three-point pressure straightening process. This paper proposes a general stroke-based model to predict the relevant parameters for the straightening process of D-type shaft, considering the bending deformations in three dimensions. The distribution of stress and strain inside the D-type shaft during the straightening process in arbitrary position of the cross section and the bending moment are analyzed by using linear hardening material model. The relationship between deflection and the internal stress on the loading position is explored, and a straightening stroke model of D-type shaft is obtained. The correctness of the stroke-based straightening model has been validated by finite element method (FEM) simulation analysis and bending experiments. The results show that the proposed model can improve the accuracy and efficiency of the D-type shaft straightening process. Furthermore, it provides a novel method for the modelling of the straightening process regarding the special shaped bar stock.

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Section: Simulation Resultsmentioning

confidence: 99%

A General Stroke-Based Model for the Straightening Process of D-Type Shaft

et al. 2020

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“…According to the arrangement position of the upper one relative to the two lower rollers, the roller system structure can be divided into symmetrical and asymmetrical arrangement. Based on the pure-bend equivalence theorem of the in-plane curved beams [28], the over-bend straightening process of in-plane curved beams with initial curvature 0 K is equivalent to the pure-bend process of straight beams with curvature 0 K after springback. At the same time, one of the deflection characteristics of LSAW pipes is the in-plane bending with single radian.…”

Section: Arrangement Of Roller Systemmentioning

confidence: 99%

A systematic study on three-roll continuous straightening process for LSAW pipes

Wang

Zhang

et al. 2022

Int J Adv Manuf Technol

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Aiming at the low efficiency and unstable accuracy of the current mold-pressing straightening for LSAW pipes, a three-roll continuous straightening process is proposed in this study, which uses the roller straightening instead of mold bending. According to the novel technology, the calculation model of theoretical straightening moment is derived based on the springback equation of plane bending with small curvature, and the calculation model of initial curvature is established for the new deflection detection method. Further, the numerical simulation analysis is carried out for the LSAW pipe case, and a straightening experimental platform is built for experiments. The research shows that the accuracy of theoretical moment equation required for straightening directly related to the initial curvature, rather than the fitting accuracy of deflection curve, and the low-order simple fitting curvature calculation model has the highest reliability. In order to control the section distortion and straightening blind area, the straightening roller should follow the equal diameter design principle, and the empirical formula of span estimation is given. Under the optimal conditions, the straightness of the corrected tubes can be controlled within 1.5‰ and the ovality of the section can be within 0.5%, which proves the feasibility and reliability of the new process. What's more, the straightening system built in this work, including process analysis software, is conducive to the automation and popularization of the new process.

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“…The straightening process of metal wire is usually divided into material nonlinearity, geometric nonlinearity and boundary condition nonlinearity, which belongs to relatively complex spatial contact problem [3] . In this paper, Explicit, a dynamic explicit analysis solver in ABAQUS software, is used to calculate and solve the problem.…”

Section: Simulation Analysis Process Of 1 Micro-aluminum Wire Straigh...mentioning

confidence: 99%

Simulation research on straightening process of micro-aluminum wire based on ABAQUS

Cai¹

2022

Fifth International Conference on Mechatronics and Computer Technology Engineering (MCTE 2022)

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Based on ABAQUS platform, this paper completes the simulation of micro-aluminum wire straightening process. Through ABAQUS simulation analysis software, combined with the characteristics of straightening process in metal wire, the straightening process is simulated and simulated; This paper analyzes some state parameters (plastic strain, residual stress, straightening force and straightness, etc.) of metal wire after straightening, and verifies the correctness of structural parameters, technological parameters and straightening scheme design included in straightening device by comparing the change curves of coordinates before and after straightening; It provides a reference basis for further perfecting the straightening theory of ultra-fine metal wire and exploring how to improve the configuration of related parameters in the straightening process.

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Pure Bending Equivalent Principle for Over-bend Straightening and Its Experimental Verification

Cited by 12 publications

References 0 publications

A General Stroke-Based Model for the Straightening Process of D-Type Shaft

A General Stroke-Based Model for the Straightening Process of D-Type Shaft

A systematic study on three-roll continuous straightening process for LSAW pipes

Simulation research on straightening process of micro-aluminum wire based on ABAQUS

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