Permanent joint such as blind rivet is most widely available and commonly used as auxiliary fastening elements. However, this assembly is permanent joint and need to avoid in design for disassembly. The objective of this research is to design and fabricate Interference Press-Fit Nut named INPRENUT. This novel product used as auxiliary fastener in mechanical assembly and it is able to disassemble for recyclability and reusability. Furthermore, INPRENUT has designed and manufactured to fulfill the needs such as; reduce setup time to pre-assemble, safety due to reduce the number sharp tools used, light-weight, and improve part assembly accuracy. In this study, preferred interference fit based on hole basis system was used to mating INPRENUT with aluminum hollow. Finite element Analysis (FEA) was used to analyse the frictional stress and maximum deformation parameter for selected dimensional fit tolerance. The results show that frictional pressure to push-in INPRENUT into aluminum hollow tube is about 435Mpa whereas to pull-out frictional force is 388MPa. Maximum deformation shows small deformation of 0.4μm occurred due to small interference of shaft and hole. Finally, the INPRENUT was fabricated, tested and assembled to an aluminum hollow tube and modular aluminum profiles. The result shows the INPRENUT was able to improve pre-assembly, safety and disassembly quality.
Aznizam, A., Husaini, M., Mohd Yusof, Z. N., Ibrahim, M. R., & Maidin, S. (2016). Design and fabrication of interference Press-Fit Nut. ARPN Journal of Engineering and Applied Sciences, 11(3), 1515–1523.