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Effect of interference and form defect on the cohesion of the shrink-fit assembly

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Abstract

One of the greatest mechanical assembly techniques is shrink-fit assembly because of its superior economics. The axis and hub are all that are needed. It is employed in a wide range of sectors, including the manufacture of trains, automobiles, and aircraft. For this action, the inner diameter of the axis is greater than the outer diameter of the hub; this discrepancy is known as the “interference” between the two cylinders. This can be done in three different ways: the outside cylinder is heated to make it expand, through the inner cylinder’s cooling to make it contract, and third, by finishing the assembly under a press. From it produces contact pressure and frictional force at the point where the two matched components come together. Because they prohibit the connection between the axis and the hub from having a flawless form surface and because we will be examining how they affect the assembly, interference, and form defects are taken into consideration in this article. The distribution of stresses, assembly resistance, and plasticity are examined using numerical modeling to determine whether interference and form flaws have a positive or negative impact, where it was concluded that the form defect is necessary in the shrink-fit assembly.

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Abbreviations

σ r :

Radial stress

σ t :

Tangential stress

p i :

Internal pressure

p o :

External pressure

δ :

Interference

E :

Young’s modulus

E ′ :

Equivalent of Young’s modulus

p nom :

Nominal pressure needed along the axial direction

F ax :

Axial loading (force extraction)

μ :

Friction coefficient

a :

Radius inside the inner ring

b :

Either the nominal inner radius of the outer ring or the nominal outer radius

c :

Radius outside the outer ring

A S :

Constant

B S :

Constant

C S :

Hollow shaft elasto-plastic radii

R :

The asperity’s peak radius

d :

Nominal diameter of the fit

l :

Length of the fit

N :

Amount of imperfections

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Authors and Affiliations

  1. Laboratoire Energétique, Mécanique et Ingénieries (LEMI), Faculté de Technologie, Université M’hamed Bougara Boumerdes, Boumerdes, 35000, Algerie

    Allal Bedlaoui & Hamid Boutoutaou

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  1. Allal Bedlaoui
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Contributions

The study’s inception and design involved input from all authors. Allal Bedlaoui and Hamid Boutoutaou prepared the material and carried out data gathering, analysis, and analysis. Allal Bedlaoui concept the manuscript’s initial draft, and all of the other authors offered feedback on earlier drafts. All authors have read and approved the final draft.

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Correspondence to Allal Bedlaoui.

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Bedlaoui, A., Boutoutaou, H. Effect of interference and form defect on the cohesion of the shrink-fit assembly. Int J Adv Manuf Technol 128, 2407–2418 (2023). https://doi.org/10.1007/s00170-023-12099-1

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