Deep drawing experiments were performed at room temperature in a 300 ton servo press. Theoretical and experimental analysis of deep drawing. In deep drawing process the main objectives are to obtain defect less or minimum defects in product. Coating of metal sheets with a polymer material before the deep drawing process provides numerous other advantages such as long service life, decorative appearance, corrosion protection. Under certain conditions, this sliding will cause friction between the tools and the material. Effect of different parameters on deep drawing process. Analysis of deep drawing process for stainless steel micro. The deep drawing process involves a great deal of sliding of the sheet material along the tools. Analysis and experiment this paper reports on the initial stages of a combined experimental and finite element analysis.
A copy of the deep drawing analysis is made and placed on a new tab. Deep drawing parameters, bioresources 122, 35303545. Therefore, an appropriate experiment cup drawing test has been performed. In the work, the size of the fixed long axis was 80 mm, and with the short axis as variables, the initial size of the short axis was 40 mm, which was increased by 10 mm after each experiment. The experiment design and finite element methods are interfaced. Deep drawing process analysis and experiment free download as pdf file. Prediction of wrinkling is a very important process for a deep drawing operation. Fundamental issues in hydroforming of deep drawing. If the depth of the formed cup is more than its diameter, the process is called deep drawing. The finite element method has recently been sufficiently developed for the analysis of metal forming processes.
The research is related to forces that appear in machine tool during the process and also to. Limiting draw ratio, deep drawing, finite element analysis, warm formin. One option is to perform the experiments, measurements and optimization of that process on an experimental laboratory device and to compare the results. A deep drawing rig was designed and built for this purpose. Hani aziz ameen ansys deep drawing process 1 ansys analysis of deep drawing process asst. The chemical composition of ni201 is given in table 1. 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. Experimental laboratory tooling for deep drawing process. Materials and methods in the present work, ni 201 was used to make parabolic cups. This extra dry contact surface is one of the major deficiency in the conventional deep drawing processes. Since the forming process is essentially a quasistatic. It is a finite element analysis based simulation has been done using deform3d for the deep drawing process. Forming of al 5182o in a servo press at room and elevated. Experimental and umerical study of ydrodynamic deep.
This paper intends to approach the deep drawing process of thin walled, mild steel, cylindrical containers, by means of a finite element analysis. Circumferential tensile strain radial tensile strain ironing. This thesis friction in deep dra wing considers some aspects of friction on the deep drawing process. The effects of forming speed at room temperature was evaluated and presented in detail. 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. Rule based dfm analysis for deep drawing wikipedia. Sheet metal forming massachusetts institute of technology. A deep drawing rig was designed and built for this. Pdf analysis of deep drawing process for hemispherical products. Table 9 and figure 14 show thickness distribution with several values of the blank thickness t.
Parts of various geometric and sizes are made by drawing operation, two extreme example being bottle caps, automobiles panels etc. The starting point of the forthcoming analysis is to. Ruptures in deep drawing, bioresources 112, 46884704. Click the select process and material bu on to open the selec on dialog. Abstract this paper reports on the initial stages of a combined experimental and finite element analysis fea of a deep drawing process.
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 is a widely used cold sheet metal forming process to draw the sheet metal in forming dye of desirable crosssection using mechanical force of the punch. Deep drawing, springback, finite element analysis, aa5754o. 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. Because of these factors, some failures may occur during the process. The original blank thickness has some effect on the thickness distribution and thinning of sheet metal blank in the deep drawing processes. Analysis of punch velocity dependent process window in. Paper open access related content design and analysis of. Parametric finite element analysis of square cup deep drawing f. In which effects of different sheets and dieblank holder angle on deep drawing process observed for sheet metal of 0. The levels chosen for the controllable process parameters are summarized in table 2.
Detailed experimental and numerical analysis of a cylindrical. Because a part wrinkled during the deep drawing process will not be accepted and most likely become as scrap. A method of correction and optimization of stamping processes is proposed. Deepdrawing is one of the most important methods used to form sheet. Dfma stands for design for manufacture and assembly. Deep drawing process analysis and experiment experiment nature. Tearing, necking, wrinkling, earing and poor surface appearance are the main failure types that can be seen in deep drawing. The objective of this research is to determine the most important factors influencing a drawing process, utilizing the help of. An incremental formulation incorporating the effect of shape change and anisotropy is used for the analysis of elastic. The blankholder increases the frictional resistance to plastic deformation. 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.
There are mainly two methods of deep drawing analysis. Fundamental issues in hydroforming of deep drawing processes. Deep drawing process is a sheet metal forming process where a punch is. Cup deep drawing test with tight deep radii assists. Deep drawing deep drawing deep drawing is defined as a. The deformation during a step is considered using the natural convected coordinate system.
Influence and interaction between lubrication condition, blank holder force and strip surface roughness on maximum drawing force and friction coefficient are investigated. It is thus a shape transformation process with material retention. Influence of process parameters on the deep drawing of. Compressive stress of the hold down plate in the axial direction radial tensile stress compressive hoops stress material thickens due to circumferential shrinking as it moves in on the cup wall. Comparative investigation of sheet metal forming processes. Presented contribution deals with force parameters research drawing and blankholding in deep drawing process of flat bottomed cylindrical cup. Analysis of elliptical cup drawing process of stainless.
The nonisothermal fe simulations are carried out using commercial software pamstamp. The traditional deep drawing process has a blankholder to prevent wrinkling of the blank. The effect of bending is investigated through the comparison of the membrane analysis and the shell analysis for stretching and deep drawing. The main aim of this paper is to determine the friction coefficient. Moreoer, the effect of forming pressure on thickness distribution has been inestigated. Deep drawing dd is one of the sheet metal forming processes widely used in automobile.
The sheet of metal is formed into 3d product by deep drawing process. I have a multistep analysis which requires an explicit implicit transfer using initial state predefined field. Analysis of optimization of blank holding force in deep. Sheet metal stamping drawing car industry 90million cars and commercial vehicles. It is a practice for designing the engineering components. Analysis of dominant process parameters in deepdrawing of. Geometrical defects correction of stamping parts by. Rightclick the original analysis tab and select copy rightclick again and select paste. This is applied on a part showing large springback. Deep drawing of polymer coated metal sheets springerlink.
After the determination of the important process parameters to study, a fractional factorial experiment design is built and the corresponding numerical simulations are carried out. 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. Finite element approach to analysis of axisymmetric reverse drawing process the intention of this research is to make analyze of deep drawing crni stainless steel process. Blankingblanking is the process ofcutting the initial sheet coil stockinto round or shaped flatsrequired for deep drawing. Finite element model figure 1 shows a sketch for drawing a circular cup. This paper reports on the initial stages of a combined experimental and finite element analysis fea of a deep drawing process. The effect of dieblank holder and punch radiuses on limit drawing. Effect of different parameters on deep drawing process for. Thus micro deep drawing with the punch diameter of 1 mm was performed with different punch velocities 1, 10 and 100 mms in this work, whereby the process behaviour, especially the experimentally acquired process window changes with variation of punch velocities.
In the present study, the deep drawing of polymer coated metallic sheets were experimentally investigated to reduce friction and increase manufacturing efficiency without using a lubricant. The factors affect the deep drawing process may be. Deep drawing is affected by many factors such as material properties, tool geometry, lubrication etc. We are a leading manufacturer specialized in sheet metal fabrication mainly stamping and welding parts since 1997, we are located in laizhou, shandong.
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