Finite element analysis software has the function of grid automatic rebuild, which can rebuild the broken grid in the analysis into a complete grid shape, which can avoid the divergence caused by numerical calculation in the analysis process. Therefore, this study aims to investigate micro deep drawing process via experimental and analysis work. The objective of this research is to determine the most important factors influencing a drawing process, utilizing the help of. Sensitivity analysis of a deep drawing process for. Parametric analysis of deep drawing process for hemisphere dome shape of. Finite element simulation of deep drawing process to minimize.
To confirm the reliability of the finite element analysis of the multistage rectangular cup drawing process, ku et al. The deep drawing process is a forming process with ongoing interest which will have a major impact on industries in coming years. To find the best group of dimensionless geometric parameters, three scales are evaluated by commercial fe software. Theoretical and experimental analysis of deep drawing. The deep drawing process involves a great deal of sliding of the sheet material along the tools. It is thus a shape transformation process with material retention. Experimental study on multistage deep drawing for rectangular cup. In the last few decades, there is a global interest in micro products, and micro forming of metals is a promising micro manufacturing method. In this article, the influence of different process parameters on the bottom thickness of cng container during the deep drawing and ironing process has been analyzed by simulation.
Deep drawing experiments for sheet plates have performed, using the analysis results that had obtained by the finite elements method. Endnote harvard json mla ris xml iso 690 pdf downloads 1274. Friction aided deep drawing using newly developed blank. The factors affect the deep drawing process may be. Blankingblanking is the process ofcutting the initial sheet coil stockinto round or shaped flatsrequired for deep drawing.
For deep drawing without a blankholder thickness ratio should be at least 3%. Ibrahim demirci, cemal esner, mustafa yasar effect of the blank holder force on drawing of aluminum alloy square cup theoretical and experimental. As a result of the remarkable demands on electronic and other portable compact devices, the need to produce various miniaturized parts, particularly those made from metallic sheet is growing. The process requires sheet metal with a high thickness ratio, to avoid wrinkling. Scribd is the worlds largest social reading and publishing site. A new process on friction aided deep drawing has been developed in which a metal blankholder divided into eight fanshaped segments is used instead of an elastomer ring used in the maslennikov process. Because a part wrinkled during the deep drawing process will not be accepted and most likely become as scrap. In this paper a new method to predict the onset of the wrinkling will be introduced, and results of this test will be compared with real deep drawing parts. Mathematical description of the processes of sheet metal forming is very complicated process because of varying loading history and complex stress state in each point of material. Sign in here to access free tools such as favourites and alerts, or to. Presented contribution deals with force parameters research drawing and blankholding in deep drawing process of flat bottomed cylindrical cup. The parameters for description of metal behaviour by the mathematical models of sheet metal forming are normally taken from a simplest mechanical test such as, for example, uniaxial traction test.
This work is licensed under a creative commons license. Analysis of the drawing process is based on the axisymmetric condition. However, a comprehensive understanding of this process is absent. This paper reports on the initial stages of a combined experimental and finite element analysis fea of a deep drawing process. Deep drawing is an extensively used press working process since it eliminates expensive machining and welding operations and enables the production of components at a very high rate. The objective of this research is to determine the most important factors influencing a drawing process, utilizing the. Deep drawing process analysis and experiment experiment. Pdf design and analysis of deep drawing process on.
Abstract this paper reports on the initial stages of a combined experimental and finite element analysis fea of a deep drawing process. Specifically, if the depth of the item created is equal to or greater than its radius, then the metal forming process can be called deep drawing. And also minimizes cycle time and other process parameters in deep drawing process. Finite element simulation of single stage deep drawing. Investigation of a new methodology for the prediction of.
Pdf analysis of deep drawing process for hemispherical products. Deep drawing process analysis and experiment experiment nature. Finite element simulation of multistage deep drawing is performed in abaqus software, version 691. To reduce various defects in deep drawing process it is necessary to control some parameters of deep drawing process. A study on a deepdrawing process with two shaping states for a fuel. The continuum or solid elements, the shell elements and the. An investigation of wrinkling and thinning in hydroforming. Most punching and blanking technology through drawn or press let the material deformation to get what we wanted dimensions.
Najmeddin arab et al4, there are mainly two methods of deep drawing analysis. Earing is one of the major defects observed in a deep drawing process. Stresses beyond yield strength of the workpiece material is required. A first course in design and analysis of experiments gary w. Pdf analytical analysis of axisymmetric deep drawing. The deep drawing process, as one of the most applicable sheet metal forming process, is widely used in many industries. Effects of various parameters in deep drawing process over. Simulation results are in good agreement with the experimental data. Under certain conditions, this sliding will cause friction between the tools and the material. Similar to other sheet metal forming processes, the dominant strain in this process is usually tensile. Deep drawing, deep drawing products, micro deep drawing. New approach for wrinkle prediction in deep drawing process.
This blank holding device consists of four drawing segments and four small wedges, which can move radially in and outwards under a certain blankholding pressure. Prediction of wrinkling is a very important process for a deep drawing operation. Finite element simulation of deep drawing process to minimize earing. Keywordsdeep drawing, finite element analysis, anisotropy, aluminum alloys. Experimental analysis can be useful in analyzing the process to determine the process parameters that produce a defect free. A deep drawing rig was designed and built for this. There are mainly two methods of deep drawing analysis. Deep drawing process analysis and experiment free download as pdf file. Analysis and experiment this paper reports on the initial stages of a combined experimental and finite element analysis fea of a deep drawing process. Deep drawing process of steelbrass laminated sheets. To achieve this, deep drawing experiments of a square cup were conducted. Deep drawing for high ldr by a new hydrorim forming process with differential temperature analysis and experiments y. In deep drawing process the main objectives are to obtain defect less or minimum defects in product.
Journal of materials processing technology 147 2004 3227 sensitivity analysis of a deep drawing process for miniaturized products amit jaisingha, k. Experimental laboratory tooling for deep drawing process. The following is a list of common problems that may be encountered when deep drawing cyclindrical cups. The objective of this research is to determine the most important factors influencing a drawing process, utilizing the help of a design of experiments and statistical analysis. In other words, in order for manufacturing companies to stay in competition, they are required to develop new and innovative fabricating processes to produce micro components with more complex features. In which effects of different sheets and dieblank holder angle on deep drawing process observed for sheet metal of 0. Sheet metal forming massachusetts institute of technology. Ruptures in deep drawing, bioresources 112, 46884704.
The developed tool sets are applied to the multistage deep drawing process of this study, and a systematic experiment for the rectangular. In this research, geometric parameters were given in dimensionless form by the buckingham pi dimensional analysis method, and a series of dimensionless groups were found for deep drawing of the round cup. Deep drawing is an important process used for producing cups from sheet metal in large quantities. Using the fld0 as a failure criterion, excellent agreement in failure heights between numerical and experimental results was achieved. Experimental analysis can be useful in analyzing the process to determine the process parameters that produce a defect free product, and the analyticalnumerical modeling can be used to model and analyze the process through all stages of deformation. Finite element simulation of earing defect in deep drawing. Applying a punch with microridges in multistage deep drawing. Rapid design of corner restraining force in deep drawn. The application of the finite element method to the numerical simulation of the deep drawing process has evolved in a significant way in the course of the last few years.
In this article, a deepdrawing process using a doubleaction hydraulic. New trends in the deep drawing of tailored blanks demands for the analysis of process parameters and their setup to obtain the drawn parts with required shape precision, strength and stiffness. Deep drawing for high ldr by a new hydrorim forming. Sheet metal stamping drawing car industry 90million cars and commercial vehicles. Recent experiments at the institute ifu indicated that the buckling test using modified specimens can enhance accuracy for the predication of wrinkling. To investigate the effects of the blank holder forces on differences in the wall thickness, which were extracted under constant pressure, deep drawing process. After analyzing all effective geometric parameters, a fittest. Finite element simulation of multistage deep drawing. Metal forming processes indian institute of technology.
A first course in design and analysis of experiments. One option is to perform the experiments, measurements and optimization of that process on an experimental laboratory device and to compare the results. Modelling and failure analysis in sheet metal forming. The workpiece material used in a deep drawing process is anisotropic in nature, due to a prior thermomechanical treatment. Deep drawing process is a sheet metal forming process where a punch. Deep drawing is put a metal sheet or stainless steel plate on the mold, through place force it will deform the sheet metal material homogeneous.