Testing of beveled crimp connections made on a prototype stand

Open access


The purpose of this study is to form and test inseparable tight joints, commonly used in the construction of heat exchangers, by crimping operation on designed prototype stand. Crimped joints are made by tools in form of cones with two types of shapes, each of the designed tools have got identical forming angle. This study uses two types of connecting blocks and plates, differing in diameters of hole and flange. Elaboration contains a case study of joints being made by the stand, which in addition to the crimping operations for some cases were glued or brazed. The article presents the features of the formed joints, by examining them by destructive testing: Micrography, tensile strength test, and non-destructive testing: Leakage test. The examined elements have been made of aluminum 6060, which is well suited to indirect or direct operations of forming joints for all kinds of coolers or condensers. Elaborated tests and studies in this study allowed to state, that joining the connection block to plate with the small diameter, was more energy-consuming than in sample sets with bigger diameter, use of glue increasing the strength of the joints by 20%, significant strength increase can be obtained after mechanical clinching with brazing operation or modification of geometrical shape of the jaws

[1] J. Varis, Economics of clinched joint compared to riveted joint and example of applying calculations to a volume product, Journal of MaterialsProcessing Technology, (2006), 172, 1, pp. 130-138.

[2] R.W. Maruda, G.M. Krolczyk, P. Nieslony, S.Wojciechowski, M. Michalski, S. Legutko,The influence of the cooling conditions on the cutting tool wear and the chip formation mechanism, Journal of Manufacturing Processes (2016)24, pp.107-115.

[3] G. Krolczyk, J. Królczyk, S. Legutko, A. Hunjet, Effect of the disc processing technology on the vibration level of the chipper during operations, Tehnički Vjesnik -Technical Gazette, (2014) 21, 2, pp. 447-450.

[4] C. Chen, X. Han, S. Zhao, F. Xu, X. Zhao, T. Ishida, Comparative study on two compressing methods of clinched joints with dissimilar aluminum alloy sheets, The International Journal of Advanced Manufacturing,(2017), 93, 5, pp.1929-1937.

[5] F.Lambiase,Joinability of different thermoplastic polymers with aluminium AA6082 sheets by mechanical clinching, The International Journal of Advanced Manufacturing Technology,(2015), 80, 9, pp.1995-2006.

[6] X.C. He,Recent development in finite element analysis of clinched joints, The International Journal of Advanced Manufacturing Technology, (2010),48, 5, pp.607-612.

[7] R. Kumar, S. Chattopadhyaya, S. Hloch, G. Krolczyk, S. Legutko, Wear characteristics and defects analysis of friction stir welded joint of aluminium alloy 6061-t6, Eksploatacja i Niezawodnosc -Maintenance and Reliability (2016), 18, pp. 128-135.

[8] J. Mucha, L. Kaščák, E. Spišák,Joining the car-body sheets using clinching process with various thickness and mechanical property arrangements Archives of Civil and Mechanical Engineering,(2011),11, 1, pp. 135-148.

[9] J. Mucha, L. Kaščák, E. Spišák,The Experimental Analysis of Forming and Strength of Clinch Riveting Sheet Metal Joint Made of Different Materials, Advances in Mechanical Engineering, (2013),5, pp. 185-196.

[10] N. Wrobel, M. Rejek, G. Krolczyk, S. Hloch, Testing of Tight Crimped Joint Made on a Prototype Stand, Lecture Notes in Mechanical Engineering, (2017), pp. 497-507.

[11] K. Mori, T. Maeno, S. Fuzisaka, Punching of ultra-high strength steel sheets using local resistance heating of shearing zone Journal of Materials Processing Technology, (2012), 212, 2, pp. 534-540.

[12] R. Pilawka, T. Spychaj, Kleje epoksydowe z nanocząstkami do łączenia metali, Kompozyty (Composites) 4 (2004) 9, pp. 34-35.

[13] N. Wrobel, M. Rejek, G. Krolczyk, E3S Web of Conferences, International Conference Energy, Environment and Material Systems (EEMS 2017), (2017), 19.

[14] P.-C. Lin, J.-W. Lin,G.-X. Li, Clinching process for aluminum alloy and carbon fiber-reinforced thermoplastic sheets, The International Journal of Advanced Manufacturing Technology (2018).

[15] Ľ. Kaščák, E. Spišák, R. Kubík, J. Majerníková, The evaluation of properties of mechanically clinched joints made of ferrous and non-ferrous materials, Advances in Science and Technology (2018),12, 1,pp. 162-170.

[16] C.-J.Lee, J.-Y.Kim, S.-K. Lee, D.-Ch.Ko, B.-M.Kim, Design of mechanical clinching tools for joining of aluminium alloy sheets, Materials and Design, (2010), 31, pp. 1854-1861.

Journal Information


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 119 119 19
PDF Downloads 47 47 8