Abstract
Friction spot welding is an innovative technique developed and patented in 2005 by the research centre Helmholtz Zentrum Geesthacht. Advantages of the process include fast joining cycles, low operational costs and good mechanical performance. It was originally developed to weld lightweight metals and has been continuously improved to weld polymers. There are only a few studies on friction spot welding of thermoplastics, and the welding of polymeric composites by Friction spot welding (FSpW) is still unpublished. This study demonstrated the technical feasibility of welding a polyamide 6 (PA6) plate over a carbon fibre polyamide 66 laminate (CF-PA66) by FSpW. The thermal history, the surface finish, the microstructure of the weld region and the mechanical shear strength of PA6/CF-PA66 lap joints were investigated. The increase in the diameter of the clamping ring – originally designed for welding lightweight metals – led to the selection of welding parameters that result in high heat input, resulting in an increased welded area and lower notch left by the tool in the sample that improved the surface finish of the weld. This optimisation resulted in a PA6/CF-PA66 joint with lap shear strength of 35 MPa (2196 N), with fracture occurring mainly in the top plate of PA6.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
