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The shear strength of the round clinching joints formed by using extensible dies

Witkowski W.

Advances in Science and Technology. Research Journal

2015

Vol. 9, nr 26

72--76

The clinching joining technology is one of the most popular joining technologies by redrawing sheet material. The joining process parameters, the sheet material and its arrangements influences joints’ strength. Cylindrical axial-symmetrical joints formed by using rigid die and punch are still developed. The change of the rigid die on the die with movable segments affect the forming process and joint strength parameters. So there is a need to do experimental researches of the possibilities of joint formation by unchanged punch geometry and different die shape. In this article the forming process parameters (forming force, process energy consumption and its standard deviations) and joints strength parameters (maximum shearing force, total dissipated energy and dissipated energy up to 0.3 maximum force), according to the ISO 12996 standard, for the joints formed with using die with 2, 3 and 4 movable segments were presented. The punch geometry was unchanged and the minimum thickness of the embossment was also unchanged. For the die with 2 and 4 segments the load force direction influence on the joints strength was also presented.

Wytrzymałość okrągłych połączeń przetłoczeniowych typu clinching podczas próby ścinania i rozrywania

Witkowski W.

Mechanik

2014

R. 87, nr 12

990--992

Przedstawiono wyniki analizy eksperymentalnej wytrzymałości okrągłych połączeń przetłoczeniowych formowanych z użyciem jednolitych narzędzi. Badania przeprowadzono na blachach o grubości 1 mm: ze stali DX51D+Z/275 oraz ze stopu aluminium EN AW-5754 w stanie O/H111. Próby ścinania i rozciągania wykonano na próbkach o różnych kształtach.

Experimental test results of clinching joints formed by redrawing by means of round single tools were presented. One millimeter gauge metal sheet materials were used respectively: steel DX51D+Z/275 and aluminum alloy EN AW-5754 in O/H111 state. The shearing and tension tests were performed on samples of different shapes.