Torque Strength and Influencing Factors Analysis for Assembled Camshaft by Knurling Joining

Qiao, Jian; Kou, Shu Qing; He, Dong; Yang, She Hua

doi:10.4028/www.scientific.net/msf.575-578.216

Cited by 11 publications

(7 citation statements)

References 3 publications

(3 reference statements)

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“…Taniguchi et al successfully used press fitting to assemble constituent parts of a bimaterial gear [172]. Shrink fitting has also been employed in research to assemble bimaterial parts [173,174].…”

Section: Joining Processesmentioning

confidence: 99%

Negative Thermal Expansion Metamaterials: A Review of Design, Fabrication, and Applications

Dubey,

Mirhakimi,

Elbestawi

2024

JMMP

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Most materials conventionally found in nature expand with an increase in temperature. In actual systems and assemblies like precision instruments, this can cause thermal distortions which can be difficult to handle. Materials with a tendency to shrink with an increase in temperature can be used alongside conventional materials to restrict the overall dimensional change of structures. Such structures, also called negative-thermal-expansion materials, could be crucial in applications like electronics, biomedicine, aerospace components, etc., which undergo high changes in temperature. This can be achieved using mechanically engineered materials, also called negative thermal expansion (NTE) mechanical metamaterials. Mechanical metamaterials are mechanically architected materials with novel properties that are rare in naturally occurring materials. NTE metamaterials utilize their artificially engineered architecture to attain the rare property of negative thermal expansion. The emergence of additive manufacturing has enabled the feasible production of their intricate architectures. Industrial processes such as laser powder bed fusion and direct energy deposition, both utilized in metal additive manufacturing, have proven successful in creating complex structures like lattice formations and multimaterial components in the industrial sector, rendering them suitable for manufacturing NTE structures. Nevertheless, this review examines a range of fabrication methods, encompassing both additive and traditional techniques, and explores the diverse materials used in the process. Despite NTE metamaterials being a prominent field of research, a comprehensive review of these architected materials is missing in the literature. This article aims to bridge this gap by providing a state-of-the-art review of these metamaterials, encompassing their design, fabrication, and cutting-edge applications.

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Section: Joining Processesmentioning

confidence: 99%

Negative Thermal Expansion Metamaterials: A Review of Design, Fabrication, and Applications

Dubey,

Mirhakimi,

Elbestawi

2024

JMMP

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“…Lätzer et al [84] and Qiao et al [122] developed knurled interference fits consisting of a shape profile that improved the performance compared to conventional interference fits. Liewald et al [92] utilised lateral extrusion of a shaft to a hardened, thin-walled hub to manufacture a combined complex shaft-flange component.…”

Section: Shrink Fittingmentioning

confidence: 99%

Review of recent developments in manufacturing lightweight multi-metal gears

Politis

Lin

2021

Prod. Eng. Res. Devel.

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This paper provides a review of recent developments in the manufacturing of lightweight multi-metal components, and in particular gears. The literature has shown that significant efforts have been made in manufacturing light gears and numerous technical challenges exist when designing for and manufacturing with dissimilar metals including challenges in heating technologies, mechanical performance, processing parameters, metal compatibility and the interface layer between adjacent materials, as well as difficulties in multi-metal simulations. Whilst the scope of multi-metal manufacturing is vast, the main concentration of this study is on the main stages of multi-metal gear production, and specifically on preform production, multi-metal heating, intermetallic bonding, and modelling of essential forming parameters. The effects of each of these methods as well as the numerous approaches studied in the literature are presented, with a recommendation being made as to a processing route that may lead to a robust multi-metal gear with minimal production line modifications to conventional steel gears.

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“…Furthermore, by assuming the external force and torque of the cam when the camshaft was in service, they simulated and analysed the fatigue coefficient of the camshaft during service, reflecting the connection strength. Qiao et al 26 developed a simulation analysis of the assembly process of the knurled assembly camshaft and analysed the equivalent stress at different torsion moments. Moreover, they tested the static torsional strength and found the camshaft used the torque value as the static torsional strength when an angular displacement (an accuracy of 0.7°) occurred between the cam and the mandrel.…”

Section: Introductionmentioning

confidence: 99%

Finite-element-analysis of connection strength of assembled camshafts with different cam-bore profiles using tube hydroforming technology

Ma,

Jiang,

Lei

et al. 2023

Sci Rep

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The assembled camshaft is a novel manufacturing product which connects the cam and the mandrel by tube hydroforming (THF) technology after they are processed separately. However, in the process of THF, the structure of the cam-bores has a crucial influence on the connection strength of the assembled camshafts. Therefore, three kinds of cam-bores with circular structure, isometric-trilateral profile and logarithmic spiral profile are selected for hydroforming with a hollow mandrel (tube) in this study. The finite-element-analysis is carried out by ABAQUS software, the variations of (residual) contact pressure and contact area under different structures are obtained, and the torsional angle variations after assembly are measured. Further, the connection strength of the assembled camshaft under three structures is discussed. The results show that the evaluation of connection strength of the assembled camshaft is affected by many factors, including contact pressure, maximum residual contact pressure, axial and circular residual contact pressure, contact area and its rate, residual contact area percentage and torsional angle. Through the comprehensive analysis of various factors, the torsional angle of the camshaft with circular structure is the largest, i.e. poor connection strength. By contrast, the torsional strength of the camshaft with isometric-trilateral profile is the largest, namely, the best connection strength.

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Torque Strength and Influencing Factors Analysis for Assembled Camshaft by Knurling Joining

Cited by 11 publications

References 3 publications

Negative Thermal Expansion Metamaterials: A Review of Design, Fabrication, and Applications

Negative Thermal Expansion Metamaterials: A Review of Design, Fabrication, and Applications

Review of recent developments in manufacturing lightweight multi-metal gears

Finite-element-analysis of connection strength of assembled camshafts with different cam-bore profiles using tube hydroforming technology

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