Deformation assisted joining of sheets to rods by indentation and injection

Alves, Luis Cardoso; Afonso, Rafael M.; Brosius, Alexander; Martins, P.A.F.

doi:10.1016/j.cirpj.2021.03.018

Cited by 3 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sheet starts to be sheared along the axial cross-section until it reaches the total sheet thickness and gets separated from the ring that is left inside the rod cavity. Both cases were able to withstand a higher force than the maximum force of approximately 35 kN that was previously observed for the same set of materials when joined by indentation and injection [5]. The reason is due to the remaining cross-section in that joining process being relatively smaller than the original sheet thickness (refer to the comparison of Fig.…”

Section: Destructive Testsmentioning

confidence: 57%

“…The research on the new sheet-rod connections made use of aluminium AA5754-H111 sheets with a thickness t 0 of 5 mm and aluminium AW 6082 rods with a diameter d 0 of 32 mm. Those materials and their respective flow curves were retrieved from a previous work of the authors [5] to which a comparison is to be made when discussing the performance of the new joining process.…”

Section: Mechanical Characterization Of the Materialsmentioning

confidence: 99%

“…In the previous approaches, the primary plastic deformation occurred in the rods instead of the sheets, but a new joining by forming process was recently developed in which the sheet is locally indented so that material is injected into a slot previously machined on the rod and a form-fit joint is produced at room temperature away from the rod ends [5]. As for boss forming [6], this process of indentation and injection can also be applied to both rods and tubes and in the case of rods, the axial compression applied by the punches will produce the indention and injection of the sheet material which will fill a circumferential slot machined in the rod (refer to Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hidden mechanical joints of sheets to rods by axial sheet bending and unbending

Afonso

Alves

2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Mechanical joints of sheets to rods by plastic deformation produced at room temperature away from the rod ends have been investigated in recent years but new developments are still needed. The process hereby presented relies in the axial bending of a sheet with a pre-drilled hole of smaller diameter than that of the rod, until the diameter of the sheet becomes equal to the initial diameter of the rod. Then, a rod is placed inside this larger hole diameter of the sheet and the sheet is unbent to its original shape, with its material being radially injected to a rectangular cross-section slot previously machined in the rod, thus producing a mechanical interlocking between the two geometries. The major process parameters are identified and their influence in the deformation mechanics is analysed by means of finite element modelling and experimentation. The experiments were carried out in unit cells while the numerical modelling analysed sheets of different lengths and thicknesses, so that to allow a proper understanding of the influence of different specifications on the new joining by forming process. Destructive performance tests were performed in the sheet-rod connections and comparisons with previous joining techniques were made to confirm the success of the new mechanical joint.

show abstract

Section: Destructive Testsmentioning

confidence: 57%

Section: Mechanical Characterization Of the Materialsmentioning

confidence: 99%