In general, the following rule applies in forming process analysis. These processes include hydroforming, hydromechanical deep drawing, aquadrawing, hydraulic deep drawing, the guerin process and the marform process. Blankingblanking is the process ofcutting the initial sheet coil stockinto round or shaped flatsrequired for deep drawing. The starting point of the forthcoming analysis is to. 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, prevention of. Groover, fundamental of modern manufacturing materials, processes and systems, 4ed. Swift has shown that a value of dd2 is close to the maximum that can be achieved before tearing of the sidewall occurs just above the punch nose radius. A copy of the deep drawing analysis is made and placed on a new tab. The process is best suitable for complex shaped problems. 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 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.
Finite element simulation of multistage deep drawing is performed in abaqus software, version 691. Finite element analysis of deep drawing and springback failure criteria two types of failures were followed through the modeling. The mechanical parameters of the sheets have been determined in uniaxial tensile and bulge tests. Deep drawing is a sheet metal forming process that involves complex material flow and force distributions. The design and control of a deep drawing process depends not only on the workpiece material, but also on the condition at the toolworkpiece interface, the mechanics of plastic deformation and the equipment used. Theoretical study on hydromechanical deep drawing process of bimetallic sheets and experimental observations article pdf available in journal of materials processing technology 2129. Fundamental issues in hydroforming of deep drawing processes. Jun 01, 20 deep drawing stationtypes blanking drawing piercing trimming 8. Analysis of punch velocity dependent process window in micro. However, the method requires high fluid pressure and punch loads.
The present study is focused on effect of mechanical parameters on the sheet formability prediction during the deep drawing process and also their sensitivity on cup dome height and thickness distribution is seen. The general preprocessor prep7 contains powerful solid modeling and mesh generation capabilities, and is. Deep drawing process, one of sheet metal forming methods, is very useful in industrial field because of its efficiency. 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. Predictioin the limiting drawing ratio in deep drawing. The traditional deep drawing process has a blankholder to prevent wrinkling of the blank. In this operation, forming of a flat metal sheet into a hollow or. Applying a punch with microridges in multistage deep drawing.
In deep drawing process the main objectives are to obtain defect less or minimum defects in product. Detailed experimental and numerical analysis of a cylindrical. In this paper, metal stamping deep drawing forming process was simulated by abaqus software. This analysis ignores the effects of friction and redundant work, which would. 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. He conducted deep drawing of irregular cups and used the slip line field slf theory to determine the optimum blank size. Analysis of the drawing process is based on the axisymmetric condition. Prediction of wrinkling is a very important process for a deepdrawing operation. Development of a multipass drawing process design system for. Deep drawing is a process for shaping flat sheets into cupshaped articles without fracture or excessive localized thinning. This process is experimental and the keywords may be updated as the learning algorithm improves. Journal of engineering sciences, assiut university, faculty of engineering, vol. The process is considered deep drawing when the depth of the drawn part exceeds its diameter.
To obtain the best deep drawing parameter in reducing wrinkle and tearing during deep draw process. Of deep drawing process the article deals with the analysis of formability of deep drawing dc06 steel sheets. Finite element simulation of single stage deep drawing. The numerical analysis and experiment results show that the punch load increases with the increase of punch stroke, and when the load reaches its maximum, the blank continues to deform with the increase of the.
Study of earing defect during deep drawing process with. The factors affect the deep drawing process may be. Numerous unconventional deep drawing techniques have recently been implemented that have helped increase the industrial uses of deep drawing. The aim of the investigations is to verify possibilities of formability of sheet metal with thickness of 0. To study the properties of the separatelyexcited dc shunt generator under noload and fullload conditions 2.
Because a part wrinkled during the deep drawing process will not be accepted and most likely become as scrap. Deep drawing provides a great application potential for the manufacturing of parts with complex shapes, even in very small dimensions. Finite element simulation of multistage deep drawing. Prediction of wrinkling is a very important process for a deep drawing operation. Deep drawing for a circular cup a initial stage and. This paper reports on the initial stages of a combined experimental and finite element analysis fea of a deep drawing process. Then the simulation results of drawing parts metal forming were analyzed. 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. Effect of mechanical properties on deep drawing formability. As the blank is drawn radially inwards the flange undergoes radial tension and circumferential compression 1.
Rightclick the original analysis tab and select copy rightclick again and select paste. Analysis of elliptical cup drawing process of stainless. In the presented work, the single stage deep drawing process of thin walled, mild steel, conical back plate of radial impeller of blowers is approached by means of a finite element analysis. Anwar 8 studied the hydroforming deep drawing process and claimed that complex shapes can be easily formed using the process. Theory to install autocad 2000i click on start run then type the following path \\fileserver\softwares\graphics section\aucad 2000i. The deep drawing process involves five stages bending, straightening, friction, compressions, and tension. The entire process of performing a finite element analysis of a metal forming operation. Open source software for experiment design and control. Finite element analysis of magnesium az31 alloy sheet in warm deepdrawing process considering heat transfer effect. Pdf analysis of deep drawing process for hemispherical.
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. Object of experiments remarks date signature 1 getting familiar with the auto cad environment. Therefore, in this project a cylindrical cup shaped is studied in term of. The continuum or solid elements, the shell elements and the. The blankholder increases the frictional resistance to plastic deformation. To find the best group of dimensionless geometric parameters, three scales are evaluated by commercial fe software. This extra dry contact surface is one of the major deficiency in the conventional deep drawing processes. It is found that in order to adequately capture the plastic properties of hcp. 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.
Theoretical and experimental analysis of deep drawing. Yang finite element analysis of elliptic cup deep drawing of magnesium alloy sheet, journal of waleed khalid jawad, investigation of contact interface between the punch and blank in deep drawing process, eng. The barlat 1989 material model is adopted for modelling the plastic response of the material and the necessary input data is examined. Publishers pdf, also known as version of record includes final page. Fem simulation of metal drawing parts forming based on the. Pdf theoretical study on hydromechanical deep drawing. There are mainly two methods of deep drawing analysis. Open source software for experiment design and control tutorial thepurpose of this paper is to describe a software package that can be used for performing such routine tasksas controlling listening experiments e. Cad lab manual computer aided engineering drawing index. Deep drawing, springback, finite element analysis, aa5754o.
Friction in deep drawing technische universiteit eindhoven. However, this process is carried out usually under laboratory conditions with a relatively low punch velocity, for example 1 mms. The input data for an ansys analysis are prepared using a preprocessor. Deep drawing of polymer coated metal sheets springerlink. Simulation of the drawing process for determining stress distribution in the drawn component for a particular displacement is explained in the presented work. Keywordsdeep drawing, finite element analysis, anisotropy, aluminum alloys. Thus, a detailed analysis of the following process variables is performed. Amra talic cikmis muamer trako mladen karivan faculty of mechanical engineering zenica bosnia and herzegovina abstract deep drawing is a process for shaping flat sheets into cupshaped articles without fracture or excessive localized thinning. Wrinkle free products using deep drawing process lokvani. It is thus a shape transformation process with material retention. Sheet metal forming is a complex process involving geometric, material and. A deep drawing rig was designed and built for this.
Include the analysis of stressstrain changes over time and the most serious regional. Analysis of elliptical cup drawing process of stainless sheet. Of deepdrawing process the article deals with the analysis of formability of deepdrawing dc06 steel sheets. A report on metal drawing operations linkedin slideshare. Concerning the so called size effects micro deep drawing is widely investigated. Presented contribution deals with force parameters research drawing and blankholding in deepdrawing process of flat bottomed cylindrical cup. Swift has also shown that there is an approximate straightline relationship between changes to the punch. The mechanics of deep drawing process is shown in fig.
Cad lab manual computer aided engineering drawing index s. Instability in the work piece, also called wrinkling of the walls. The depth of the cup created should not exceed the diameter of the blank sheet dieter, 1988 and the thinning should be kept bellow 20% of the original thickness t. I analyse a model of an evolving network represented as a directed graph. To obtain the armature voltage vs armature current load curve of the generator. Click the select process and material bu on to open the selec on dialog. To confirm the reliability of the finite element analysis of the multistage rectangular cup drawing process, ku et al.
Circumferential tensile strain radial tensile strain ironing. Formation and destruction of autocatalytic sets in an. Deep drawing deep drawing deep drawing is defined as a. Objective getting familiar with the auto cad environment. Analysis of punch velocity dependent process window in. After analyzing all effective geometric parameters, a fittest relational. The phenomenon of wrinkling flange instability is specific to the process of deep drawing. Deep drawing is one of widely used sheet metal working process in industries to produce cup shaped components at a very high rate. Investigation of a new methodology for the prediction of. Process analysis and design in micro deep drawing utilizing a. Deep drawing draw ratio blank holder blank holder force tube hydroforming these keywords were added by machine and not by the authors.
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