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The deep drawing process is commonly used in the industry because its ability to produce parts with reduced weight and good mechanical properties at a high production rates. However, the elasto-plastic deformation mechanism of deep drawing is complex and difficult to analyse; this because there are many process parameters and variables involved tha...
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... [10], however in this paper this concept is combined with the volume conservation principle. According to Lange [10], the equivalent diameter De is defined as the diameter of the circular blank whose area AC is equal to the rectangular blank area, AR, with length A and width B, see Figure 3. Thus, considering that AC=AR the equivalent diameter De can be obtained as: ...
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Citations
Deep drawing is the process of obtaining three-dimensional containers of certain depths and shapes under pressing forces with the help of drawing molds of sheet materials. In this study, the numerical shaping of rectangular cups in angled deep drawing dies was investigated experimentally and by using the finite element method (FEM). For this purpose, die/blank holder surfaces have α=0°, α=3°, α=6°, α=9°, α=12° and α=15° angles in order to facilitate material flow into the die cavity. The punch and die corner radii are taken as 8 mm. St37 steel sheet with a thickness of 0,9 mm was used as the test material. The experiments were carried out by applying die/blank holder forces of 2500 N, 5000 N, 7500 N and 10000 N. The effects of angles and die/blank holder force on limit draw ratio, wall thickness and the damage of cups were investigated experimentally and numerically, and optimum punch force was determined. Obtained experimental results were compared with ANSYS results. As a result, it has been determined that the increase in die/blank holder surface angles in drawing dies with rectangular geometry with different angles provides a higher limit drawing rate than conventional dies. It has been seen that the experimental results and numerical results are approximate values.
Considering the fact that the most of the human equipment developed by forming processes, one of the methods of producing these materials is through the metal forming process. In Industrial process, prediction of the final dimension of the part after unloading is an essential problem. Thickness distribution is the geometric change made to a part at the end of the forming process when the part has been released from the forces of the forming tool. In this study, the effects of grain size and sheet thickness on the formability of annealed copper sheets in the deep drawing process were studied. To this end, the effect of friction coefficient was evaluated for a total of 64 different cases by the finite element method (FEM). The effect of optimal parameters and grain size on the maximum deep drawing height (DDH) and thickness distribution of the square part was investigated. According to the literature review, punch and die radii uses were spotted. Based on the simulation software, the best thickness distribution was obtained in no-friction force between tools. According to the experimental results, as the grain size increased from 33 to 161 µm and from 25 to 158 µm, the thickness of wall and bottom specimens was increased, and the corner was decreased.
