Mechanical Clinching and Self-Pierce Riveting of Thin Three Sheets of 5000 Series Aluminium Alloy and 980 MPa Grade Cold Rolled Ultra-High Strength Steel

Abe, Yohei; Maeda, Takato; Yoshioka, Daiki; Mori, Ken-ichiro

doi:10.3390/ma13214741

Cited by 36 publications

(21 citation statements)

References 46 publications

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“…The joint quality of self-punch riveting and clinched joints was studied simultaneously. 13 The tensile and shear loads of the two joints were almost the same, and the tensile load of both joints was lower than the shear load. Li et al 14 proposed a laser shock micro-shear riveting process and investigated joint failure.…”

Section: Introductionmentioning

confidence: 89%

Numerical investigations of the clinching process and the failure prediction of clinched joints for dissimilar sheets

Gao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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The clinching process is more and more used in automotive design and manufacturing. Traditional quality inspection of joints needs a lot of destructive tests, which is time-consuming and material-consuming. In this paper, the clinching process and joints failure of dissimilar materials, 6061 aluminium alloy and HC340/590DP dual-phase steel, are studied. A two-dimensional finite element model is established. Experiments were carried out to verify the numerical model. Through the axial tensile test, the quality of clinched joints for upper steel-lower aluminium alloy and upper aluminium alloy-lower steel were measured, respectively, and the strength and safety of the joints met the requirements of design indexes. The conventional prediction model of maximum tensile force and its modified model was researched. Combined with numerical simulation results, the fracture load, the separation load, and the failure mode of two clinched joints were predicted, respectively. Furthermore, the results are in good agreement with the experimental results. The results show that the modified prediction model of maximum tensile force has a good prediction result, and the error rate is less than 10%. The modified prediction model of maximum tensile force can effectively predict the tensile failure test results, which provides a basis for the quality evaluation and strength prediction optimization of dissimilar materials clinched joints.

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Section: Introductionmentioning

confidence: 89%

Numerical investigations of the clinching process and the failure prediction of clinched joints for dissimilar sheets

Gao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…However, it was limited to conditions where the lower sheet thickness ratio was large. Mori et al [ 35 ] conducted the joining experiments under conditions where the lower sheet thickness ratio was small, but the joining by self-pierce riveting is difficult because of the risk of cracking and the large difference in flow stress of the sheets [ 19 , 36 ]. In addition, self-pierce riveting has the problem that different sheet strengths affect the joinabilities, and the effect of different combinations of sheets on the deforming behaviors has not been clarified.…”

Section: Introductionmentioning

confidence: 99%

Self-Pierce Riveting of Three Thin Sheets of Aluminum Alloy A5052 and 980 MPa Steel

2022

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Self-pierce riveting of three thin sheets of 980 MPa steel and 5052 aluminum alloy was performed to investigate the effect of sheet configuration on the deforming behaviors of the sheets and the rivet and joint strength. When the lower sheet was aluminum alloy, the joining range was relatively wide, i.e., the interlock hooking the rivet leg tended to be large. In the sheet configuration in which the upper and lower sheets were A5052 and the middle sheet was 980 MPa steel, the rivet leg spread out moderately and the joint without defects was obtained. In the lower 980 MPa steel sheet, fracture tended to occur due to the low ductility of the lower sheet, and the joining range was narrow with the small interlock although the three sheets were joined by an appropriate die shape. In joint strength of joined three sheets, fracture occurred in the lower-strength aluminum alloy sheet if interlocks of about 300 μm and 150 μm could be formed in the lower aluminum alloy sheet and 980 MPa steel sheet, respectively.

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“…Joining by the pressing method usually does not require an additional hole. The use of pressed joints is limited by the maximum joining force, the sheets’ material elastic spring back, the protrusion of the joint and sheet thickness [ 1 , 2 ]. Joining by pressing methods are still being developed and improved, so a brief account of new varieties of pressing joints (clinching, self-piercing riveting, clinch riveting) will be presented in this paper [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…The main geometric parameters of the clinched joint are thickness of the embossment (parameter X ), width of the interlock in the upper sheet ( t n ), width of the interlock in the lower sheet ( t d ) and interlock angle ( θ ). The designed groove in the die controls sheet material flow, and it is critical to the formation of the interlock [ 1 , 2 ]. Witkowski [ 6 ] presented the strength of clinching joints made by rigid tool for two sheet material: steel DX51D + Z/275 and the aluminum alloy EN AW-5754 in O/H111 state.…”

Section: Introductionmentioning

confidence: 99%

“…The most commonly used joining methods for aluminum parts are welding, resistance welding, brazing, soldering and friction stir welding. Other joining methods that can be used in the assembly process of aluminum elements are adhesive bonding, fastening, riveting, clinching, clinch riveting, self-piercing riveting or tabs bending [1,2]. In welding processes, the thermal after-effects and distortion are obtained [3,4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on the Influence of the AW 5754 Aluminum Alloy State Condition and Sheet Arrangements with AW 6082 Aluminum Alloy on the Forming Process and Strength of the ClinchRivet Joints

2021

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Clinching joints with an additional deformable rivet are modifications of the clinching joints. The clinch riveting (CR) joint is formed indirectly by a deformable rivet. The research included an analysis of CR joints’ forming process for aluminum alloy sheets made of AW 6082 in T6 state condition and AW 5754 in three different state conditions: H11, H22 and H24. As a result of forming the joint for various sheet arrangements, the highest value of blocking the upper sheet in the lower sheet (tu) was obtained for the arrangements with two 5754-H24 aluminum alloy sheets. For such a large interlock parameter tu, the greatest thinning of lower sheet (tn) was obtained, which influenced the maximum tensile shear force and the joint failure mechanism. Based on the load-displacement diagrams obtained from the static shear test of lap joints, the total energy of failure and energy to achieve the maximum load capacity were calculated. The highest energy absorption to achieve the maximum load capacity, in the case of the same sheet materials, was obtained for the 5754-H11 aluminum alloy sheets. On the other hand, among the tested combinations, the highest value of energy absorption (for the joint maximum load capacity) was obtained for the sheet arrangement: top sheet AW 6082-T6 and the bottom AW 5754-H24. The highest value of the total energy up to fracture was obtained when the material of the top sheet was AW 6082-T6, and the bottom AW 5754-H22. For each sheet arrangement, a similar analysis of the joint strength parameters, interlock parameters and forming force were made.

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Mechanical Clinching and Self-Pierce Riveting of Thin Three Sheets of 5000 Series Aluminium Alloy and 980 MPa Grade Cold Rolled Ultra-High Strength Steel

Cited by 36 publications

References 46 publications

Numerical investigations of the clinching process and the failure prediction of clinched joints for dissimilar sheets

Numerical investigations of the clinching process and the failure prediction of clinched joints for dissimilar sheets

Self-Pierce Riveting of Three Thin Sheets of Aluminum Alloy A5052 and 980 MPa Steel

Research on the Influence of the AW 5754 Aluminum Alloy State Condition and Sheet Arrangements with AW 6082 Aluminum Alloy on the Forming Process and Strength of the ClinchRivet Joints

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