Mechanical Joining by Forming[1]

The increasing use of multi-material constructions lead to a continuous increase in the use of mechanical joining techniques due to the wide range of joining possibilities as well as the high load-bearing capacities of the joints. Nevertheless, the currently rigid tool systems are not able to react to changing boundary conditions, like changing the material-geometry-combination. Therefore research work is crucial with regard to versatile joining systems. In this paper, a new approach for a versatile self-piercing riveting process considering the joining system as well as the auxiliary joining part is presented.

Download Full-text

A New Mechanical Joining Technique for Steel Compared with Spot Welding

10.4271/830128 ◽

1983 ◽

Cited By ~ 2

Author(s):

J. M. Sawhiil ◽

S. E. Sawdon

Keyword(s):

Spot Welding ◽

Mechanical Joining

Download Full-text

Joining by forming of metal–polymer sandwich composite panels

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405418815386 ◽

2018 ◽

Vol 233 (10) ◽

pp. 2089-2098 ◽

Cited By ~ 2

Author(s):

João PM Pragana ◽

Tomás RM Contreiras ◽

Ivo MF Bragança ◽

Carlos MA Silva ◽

Luis M Alves ◽

...

Keyword(s):

Adhesive Bonding ◽

Sandwich Composite ◽

Composite Panels ◽

Forming Process ◽

Joining By Forming ◽

Bulk Forming ◽

New Concepts ◽

Mechanical Fastening ◽

Mortise And Tenon ◽

Metal Polymer

This article presents new joining-by-forming processes to assemble longitudinally two metal–polymer sandwich composite panels perpendicular to one another. Process design draws from an earlier development of the authors for metal sheets to new concepts based on the combination of sheet-bulk forming with mortise-and-tenon joints. Selected examples obtained from experimentation and finite element modelling give support to the presentation. A new three-stage joining by the forming process is capable of producing mechanically locked joints with larger and stiffer flat-shaped heads than those fabricated by alternative single- or two-stage solutions. Failure in the new three-stage joining by the forming process is found to take place by cracking instead of disassembling after unbending the flat-shaped head of the joint back to its original shape. The required forming forces to produce the new metal–polymer joints are below 15 kN, allowing them to be an effective, easy-to-implement alternative to existing solutions based on adhesive bonding, welding and mechanical fastening.

Download Full-text