At present, the cylindrical details with a bottom thicker than wall made from sheet metal manufactured according to the traditional technological processes: deep drawing in the first step in order to reduce the diameter of the workpiece, then reduced wall thickness by the ironing (while almost no change in the diameter of product). For technology process being applied that has a lot of steps leads to reduced productivity, increased cost of tools manufacturing, increased energy costs and labor. To improve the efficiency of the drawing process, the paper conducted research and proposed combine drawing method. Combine drawing is the process of deformation while reducing the diameter and wall thickness of the workpiece or the product. By using 2D Deform simulation software, the article has simulated the first step of combine drawing technology in the process in fabrication of cylindrical details from sheet metal, which have wall thickness thinner than bottom. The simulation results are verified by empirical survey process. The simulation results show a similarity with the theoretical calculations and experimentation process. From this, it confirms the rationality of the combined drawing technological process and the usefulness of simulation tools in the calculation and design of the combined drawing technological processes in order to minimize the testing process, increase productivity and reduction in production costs.
Keywords : Drawing, Combine drawing, Forming, Deformation, Simulation.