Volume 20, Issue 5 (May 2020)                   Modares Mechanical Engineering 2020, 20(5): 1235-1243 | Back to browse issues page

‎ 20.1001.1.10275940.1399.20.5.17.6

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Effect of Tool Geometry on the Tensile Strength of Clinched Joint and Tool Optimization Using Orthogonal Experimental Design Method
S.A. Alavinejad1 , S.H. Ghaderi * 2
1- Mechanical & Mechatronics Engineering Faculty, Shahrood University of Technology, Shahrood, Iran
2- Mechanical & Mechatronics Engineering Faculty, Shahrood University of Technology, Shahrood, Iran , s.h.ghaderi@shahroodut.ac.ir
Abstract:   (2015 Views)
Sheet metal clinching process is a forming-based method for joining sheet metal parts. To ensure sufficient joint strength, it is necessary to design the forming tool optimally. This paper deals with numerical and experimental study of the clinching process of steel sheets of dissimilar thicknesses using a fixed die in order to optimize the geometric parameters of the clinching tool. In this study, using the orthogonal experimental design (OED) method and finite element analysis in Abaqus software, the important input parameters of tool design including punch radius RP, die cavity depth Pm, die groove width Lm and punch face angle PBA were optimized in order to achieve the highest clinch strength F as the target variable. The upper and lower sheets used in this study are 1.5 and 2 mm in thickness, respectively, and made of DX51D galvanized steel, manufactured according to EN10346/00 by Mobarakeh Steel Company. After running the experiments designed based on the OED in the computer, the optimal values of RP= 2.6mm, Pm= 1.4mm, Lm= 1.2mm and PBA= 1° and F= 2319N were obtained. Next, a clinched joint tool was designed and fabricated based on the optimum geometric parameters. The evaluation and comparison of clinch geometry and tensile strength obtained from optimum design simulation and the experimental counterparts demonstrated very close correlations.
Keywords: Sheet Metal Clinching, Orthogonal Experimental Design (OED) Method, Optimization Finite Element Analysis, Joint Strength
Full-Text [PDF 1070 kb]   (1880 Downloads)    
Article Type: Original Research | Subject: Metal Forming
Received: 2019/07/2 | Accepted: 2019/10/22 | Published: 2020/05/9
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