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• Experimental Study on the Effect of the Geometry of Punching Tool on Clinch Joints

  154-158

  Szabolcs Jónás

  Péter Zoltán Kovács

  Views:

  129

  In this study the effect of the punching tool’s geometry on aluminum alloy clinch joints is analyzed by experiments. Based on FE simulations the tip radius and the cone angle of the punching tool is changed, and their effect was analyzed by microscopic investigations and single lap tensile-shear tests.

• Experimental and Numerical Investigation of Clinched Joints

  80-86

  Szabolcs Jónás

  Miklós Tisza

  Views:

  102

  In this study DP600 type of steel sheets were examined by experimental and numerical simulations. The clinch joint is can be created between thin sheets with a punching tool and a die during plastic deformation. The punching tool is deforming the sheets with a given force. The process is kind of a press forming joining technique which makes the joints defines by the tools. During the process the sheets are plastically deformed and the specific “S” shaped undercut is formed. This shape is one of the most essential geometrical parameter of the joints.

• Effect of the Friction Coefficient on Clinch Joints

  86-90

  Szabolcs Jónás

  Miklós Tisza

  Views:

  192

  In this study the effect of the friction coefficient on the clinch joints was examined in experimental and numerical way also. The knowledge of the frictional behaviour during the mechanical joining (i.e. clinching) is important from the point of view of resultant geometry which is related to and influence the strength of the joints, and furthermore the maximal forming force is limited by the tool’s failure load which can be reach with a non-favourable frictional condition, as well the aesthetic aspect are also has an importance in some special cases (e.g. in automotive industry).

• Determination of Different Parameters to High Strength Steel Clinch Joints by FEA

  341-347

  Szabolcs Jónás

  Miklós Tisza

  Views:

  223

  In this article the clinched joints were analyzed by finite element method (FEA). The base materials were advanced high strength steels (DP 600, DP 800 and DP 1000). The model validation procedure was done by the DP 600 type of steel sheets; the other two types of steel were only simulated. The goal was to determine the geometrical properties of the joints with different strength steels. The FEA model was the same in every mechanical point of view therefore the results are comparable. The main geometrical parameters of the clinch joints are the neck thickness (tN), the undercut (C), the bottom thickness (tB) and the height of the protrusion (h); these values were compared.

• Quality Questions of Clinch Join

  122-127

  Szabolcs Jónás

  Miklós Tisza

  Views:

  89

  This article deals with the quality of the clinch joints. Due to the volume of the production there is a need for the inspection of the joints and the monitoring of the joining process. Different producers give solutions for the inspection and monitoring and these solutions will be introduce through 1-1 example their importance.