: The spot clinch process is one of the processes for joining metal sheets. This process involves two steps, first the deep drawing of the sheets and then the peripheral extrusion of the sheets. The deformation in this process is such that the thickness of the sheets decreases and this reduction of the thickness is the result of the extrusion of the sheets. In this process, the thickness of the sheets is reduced to a degree that does not fail. One of the applications of this method of connection is the automotive industry, airplane and home appliances. Given the positive effect of reducing the contact surface of the punch with the sheets, in this study a punch rotation system was designed. The design is reducing the contact conditions of the punch and change the contact. By reducing the forces of cold forming process, there are also suitable conditions for optimizing the press used in this process. In this research, the design of the rotary system in Catia software has been performed. In order to validate the results after evaluating the energy and pitch force diagrams, simulation volatility is shown in the networking. Then, the rotary system was designed, made and applied in practice by connecting metal plates (st13) with this method. After comparing the numerical and practical simulation results, the c-frame press used in this process is optimized topologically to reduce the weight. Then, the optimized model was created by Abaqus 6.13 with the help of Geomagic and Catia software. In order to ensure an optimization model, this model has been numerically simulated in Abaqus software, and the pressure tensions of this model have been investigated. To validate numerical simulation results, the optimization model was made and under the test of tensile test. Keywords: Metal forming , spot clinch , orbital clinch , Topology optimization , FEM simulation