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Geometrical parameters and strength of clinching joint formed with the use of an additional rivet

Mucha Jacek, Boda Łukasz, Witkowski Waldemar

Archives of Civil and Mechanical Engineering

2023

Vol. 23, no. 2

art. no. e114, 2023

In the publication, the results of an experimental analysis of joint formation by pressing of DX51D steel sheets with thickness of 1.5 (mm) with the use of a rigid punch and an additional deformable rivet of various shapes were presented. The influence of the use of a steel rivet with a diameter d = 5 (mm), similar to the dimensions of the forming punch in the case of the classic clinching variety on the interlock parameters was investigated. The used die was with a four movable segments-dedicated to connections made in the clinch-riveting technology by TOXR PRESSOTECHNIK. In additional, experimental tests were made for joining sheets with a rivet of various shapes, i.e. with a through hole. Joints were formed and the correctness of the upper blockage in the lower sheet was observed on the joints cross-sections. The interlock parameters were measured for each joints samples. In order to compare the influence of using an additional rivet on interlock parameters and joints strength the traditional clinching joints were also made. The minimal thickness of the traditional clinching joint embossment for 2 sheets of 1.5 (mm) thickness for each was X = 0.75 (mm).

The characteristics of H320LA steel sheet clinching joints

Mucha J.

Advances in Manufacturing Science and Technology

2010

Vol. 34, nr 4

47-61

This paper presents the examination results for redrawing joints made of H320LA thin sheet metal. The joint quality has been evaluated by visual and strength examinations. The numerical model of joint forming process has been developed. The effect of die geometrical parameters on the achieved joint lock size and maximum forming force has been determined. It has been found that the die groove width is the most important parameter affecting the material plastic flow effect and energy consumption of the joining process. The results of experiments and numerical tests enable determining the effective process parameters of H320LA sheet metal joining process.

W pracy przedstawiono wyniki badań połączeń przetłoczeniowych, wykonanych z cienkiej blachy ze stali H320LA. Podstawą oceny jakości tych połączeń były wyniki próby statycznej rozciągania oraz badania makroskopowe. Opracowano model numeryczny procesu kształtowania połączenia. Określono stopień oddziaływania parametrów geometrycznych matrycy na rozmiary utworzonego zamka w złączu oraz maksymalną siłę jego formowania. Stwierdzono, że szerokość rowka ma największy wpływ na efekt płynięcia plastycznego oraz energochłonność procesu łączenia blach. Wyniki badań eksperymentalnych oraz numerycznych umożliwiają ustalenie efektywnych parametrów technologicznych procesu łączenia blachy ze stali H320LA.