Joining sheets to rods by boss forming

Alves, L.M.; Afonso, Rafael M.; Martins, P.A.F.

doi:10.1016/j.cirp.2019.03.002

Cited by 8 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Along recent years, joining solutions have been presented that are limited to the production of sheet-rod connections located at the rods ends by conventional boss forming [2] and incremental boss forming [3], which produce two annular flanges for both supporting and fixing the sheet to the rod. More recently, a cross-rolling process was employed to produce sheet-rod connections away from the rod ends [4], through the expansion of the rod against the sheet by a combined axial and rotational movement of two pairs of V-grooved rolls which form two opposite annular flanges that lock the rod to the sheet.…”

Section: Introductionmentioning

confidence: 99%

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

Afonso

Alves

2022

Int J Adv Manuf Technol

Self Cite

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: Introductionmentioning

confidence: 99%

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

Afonso

Alves

2022

Int J Adv Manuf Technol

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this method, the teeth shape of the shaft was transcribed to the inside hole surface of the disc. Alves et al (2019) proposed a cold plastic joining method for rod and annular sheet. In this method, the rod was mechanically interlocked with the sheet by boss forming of the outer radius of the rod.…”

Section: Introductionmentioning

confidence: 99%