Numerical and analytical investigation of steel–aluminum knurled interference fits: Joining process and load characteristics

Kleditzsch, Stefan; Awiszus, Birgit; Lätzer, Michael; Leidich, Erhard

doi:10.1016/j.jmatprotec.2014.12.019

Cited by 11 publications

(7 citation statements)

References 4 publications

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“…However, the proposed computational method is not validated experimentally. Kleditzsch et al 21 studied the effect of shaft chamfer angle, hub diameter and geometrical characteristics on joining as well as push out forces of steel-aluminium knurled interference fitted assemblies and concluded that the shaft chamfer angle is one critical parameter that influences the joining as well as extraction of the interference fitted assemblies. Buczkowski and Kleiber 22 studied the influence of surface roughness on elasto-plastic shrink fitted joints and concluded that the static behaviour of the assembly depended considerably on the surface finish of the mating components.…”

Section: Introductionmentioning

confidence: 99%

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Raj

Bhatti

Dhanish

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Interference fits are commonly used in engineering for various applications. While the effect of many factors on the load-carrying ability of interference fits has been studied extensively, the combined effect of cylindricity, roundness and roughness does not appear to have been considered to that extent, and this paper is an attempt to remedy the situation. As a first step, finite element method was used to verify that there will be a reduction in the load-carrying ability due to the introduction of perfect geometrical deviations on the shaft. Thereafter, a detailed experimental investigation was carried out to study the effect of cylindricity and their joint effect with various other factors on the axial load-carrying ability of shaft–bearing interference fitted assemblies. A number of shafts of C40 steel of nominal diameter 20 mm were manufactured with varying cylindricity values and selectively assembled with standard deep grove ball bearings, thereby achieving interference fits with a grade of H7/u6 between them. The assembled specimens were tested on a Universal Testing Machine with a specially made fixture and the maximum extraction load determined. The effect of the various factors on the extraction load was examined using statistical methods. It was found that shaft cylindricity error did reduce the load-carrying ability of interference fits. The combination of interference, cylindricity and surface roughness was found to give the best prediction for extraction load. Certain other parameters were also examined, but they were not found significant.

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Section: Introductionmentioning

confidence: 99%

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Raj

Bhatti

Dhanish

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Afonso et al presented a new joining by the boss forming process for fixing rods and tubes to sheets [ 22 ]. Kleditzsch et al investigated the joining process of steel-aluminum knurled interference fits [ 23 ]. They provided detailed investigation results of the influence of the shaft-chamber angle, hub-diameter ratio, and geometric interference on knurled interference fits.…”

Section: Introductionmentioning

confidence: 99%

Study on Effect of Shapes of Serration of Joining Plane on Joining Characteristics for the Aluminum–Steel Multi-Materials Press Joining Process

Lee

et al. 2020

Materials

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Recently, mechanical joining processes have received much attention for joining multi-materials. In particular, these processes have a great demand in the automobile industry for weight reduction. The press-fitting process is a representative mechanical joining process. In this process, the shape of the interfacial serration on the joining plane is very important because it has a significant effect on the joining strength. In this study, the characteristics of the aluminum–steel press joining process were investigated according to the shape of the interfacial serration of the joining plane. The deformation of the material and the forming load were investigated by conducting finite element analysis. In addition, the unfilled height of the material, joining force, and torque were measured experimentally.

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“…Further calculations of the static load capacity in studies reviewed by the authors are predicated on the shear failure or equivalent stress of the counter profile [3][4][5][6]. Some of these studies regard the strain hardening in relation to the shaft chamfer angle φ, which divides the joining process into cutting and forming joining [7]. Similar to chip removing processes, a sharp edge (φ = 90°, Figure 1b) of the harder knurled machine part cuts a groove into the softer part, forming a chip.…”

Section: Introductionmentioning

confidence: 99%

Fatigue strength of inner knurled interference fit joined by forming and cutting methods

Suchý

Leidich

Hasse

et al. 2019

Frattura Ed Integrità Strutturale

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The joining of machine parts by plastic forming is a common method for transmitting forces and torque. In drive trains, the 'knurled interference fit' has a high transmission capacity through the combination of frictional connection and form fit. In the present study, the shaft specimen made of C45 steel is joined with an inner knurled hub made of 16MnCr5 casehardened steel. The influence of the joining process parameters on the torsional fatigue strength of the shaft-hub connection is experimentally investigated in this paper. The most important parameter is the chamfer angle of the knurled hub, which determines the rate of strain hardening in the material and differs between the cutting and forming joining processes. This study shows that knurled interference fit connections, joined by forming, achieve a higher fatigue strength and a higher maximum static torque than connections joined by cutting.

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Numerical and analytical investigation of steel–aluminum knurled interference fits: Joining process and load characteristics

Cited by 11 publications

References 4 publications

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Study on Effect of Shapes of Serration of Joining Plane on Joining Characteristics for the Aluminum–Steel Multi-Materials Press Joining Process

Fatigue strength of inner knurled interference fit joined by forming and cutting methods

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