In this paper a numerical study of hdd of a can box is presented. Effects of forming media on hydrodynamic deep drawing. Hydromechanical deep drawing process of one irregular box with tapered sidewall and curved flange was investigated by numerical simulation and. Hydromechanical deep drawing of cups with stepped geometries. Microhydromechanical deep drawing mhdd, a typical microforming method, has been developed to take advantage of hydraulic force. In this paper, an improved approach is proposed to determine the optimal profiles of two controllable process parameters hydraulic pressure and blank holder force, which improve the forming condition andor make better use of forming limits in.
The information contained in a drawing must be used to build an accurate componentsystem. Hydromechanical deep drawing this paper deals with the. Jens buchert, university of applied sciences, aalen, germany. Technical drawing is concerned mainly with using lines, circles, arcs etc. Theoretical study on hydromechanical deep drawing process. The deep drawing process involves a great deal of sliding of the sheet material along the tools.
The thickness reduction pointed out a good agreement with the values of 8. Our approach combines optimization scheme, design rules and numerical tests using finite element analysis incorporated with a damage model. On the scale dependence of micro hydromechanical deep drawing. Deep draw press is applied in production techniques, like deep drawing, stamping, cutting. Hydromechanical definition of hydromechanical by the. Conventional deep drawing of automobile parts which have large outer surface areas such as roofs, doors and hoods leaves. The study of the mechanics of fluids or the laws of equilibrium and motion concerning fluids. Teaching the most important fundamental laws governing deep drawing. A cup deep drawing example from literature is used for the validation of the simulation methods available in lsdyna. The advantages of hydromechanical deep drawing such as increased deep drawing ratio, transfer of complex contours from punch to the blank surface, reduction of drawing stages and better part quality have been successfully investigated. Analysis of an axisymmetric deep drawn part forming using. Simulation of aluminium sheet metal deep drawing at. Increasing use of new technologies in automotive and aircraft applications requires intensive research and developments on sheet metal forming processes.
Introduction deep drawing is a sheet metal forming operation. Pdf theoretical study on hydromechanical deep drawing. Hydromechanical deep drawing, geerts deep drawing and re. Special considerations for deep drawing of aluminium sheet metal. Numerical simulation of hydromechanical deep drawing a. 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. Read theoretical study on hydromechanical deep drawing process of bimetallic sheets and experimental observations, journal of materials processing technology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. In the hydromechanical deepdrawing process, the fluid pressure is used for postponing the fracture occurrence in the blank, while the thtb technique allows to create a material property gradient through a suitable artificial aging treatment carried out prior to the forming process. The hydromechanical forming tool may include a liquid. Optimization of forming load and variables in deep drawing. A new type of passivepressurized hydromechanical deep drawing phdd tooling with two pistons is designed and manufactured. The manufacturing of deep, cuplike products from thin sheet metal is known as deep drawing.
Browse through 84 potential providers in the deepdrawing industry on europages, a worldwide b2b sourcing platform. However, it is very important that the drawing produced to be accurate and clear. Mech 211, mechanical engineering drawing welcome to. Deep drawing for a circular cup a initial stage and. Drawing tools nageswara rao posinasetti 1 february 6, 2012 2 february 6, 2012 sheet metal operations drawing is the process of making cups, shells, and similar articles from metal blanks. Numerical simulation conducted by finite element method is one of the most powerful tools for analyzing metal forming processes. Among them, hydromechanical deep drawing hdd is, probably, the process which has gained the major interest in industries in the last few years. To investigate the effects of draw depth and blank holder force in deep drawing process.
It is a language of communication between architects and engineers, usually to convey information about the object. Mechanical engineering drawing concordia university. The deepdrawing process is simply and widely used in the. Effect of various parameters on the wrinkling in deep. The punchdie clearance is slightly larger than the thickness of the sheet metal to be deep drawn. Effect of various parameters on the wrinkling in deep drawing cylindrical. Deep drawing of circular shells o given circular cup inside diameter, height and material, the calculator determines the number of deep drawing operations needed to form the cup. A hydromechanical forming tool is disclosed that may include electrohydraulic forming chambers in which a stored charge circuit may be discharged through electrodes to improve the level of detail that may be formed in a blank.
Journal of engineering sciences, assiut university, faculty of engineering, vol. Isf150b50mp2 the deep drawing press offers new advanced hydroforming capabilities needed for complex part designs. Optimization of forming load and variables in deep drawing process for automotive cup using genetic algorithm kakandikar g. Hydromechanical deep drawing forming of flat sheets alongside internal highpressure forming, hydromechanical deep drawing is also continually gainin. Investigation of forming speed and friction on drawability. Sheet metal process calculator nagformsheet contains a calculator to help design the forming sequence. Micro hydromechanical deep drawing mhdd, a typical microforming method, has been developed to take advantage of hydraulic force. This study focuses on the assessment of sheet hydroforming, hydro. The next work will be focused to numerical simulation of the researched. Matthias an analysis, based on the energetic stability criterion combined with numerila. In this study, the effect of this relative tooling feature size on drawing characteristics and effects to improve the drawability, such as friction holding effect, hydrodynamic lubrication effect and compression effect by blank edge radial pressure, in micro hydromechanical deep drawing mhdd are investigated using plasticity theory and. Pdf effects of forming media on hydrodynamic deep drawing. Similar to conventional deepdraw forming, our press shapes metal sheets into a predefined geometry by using a fluid under high pressure. Improving the hydromechanical deepdrawing process using.
Hydromechanical drawing process and machine ford global. Study on hydromechanical deep drawing with uniform. Talat lecture 3704 deep drawing 15 pages, 16 figures advanced level prepared by k. Read study on hydromechanical deep drawing with uniform pressure onto the blank, international journal of machine tools and manufacture on deepdyve, the largest online rental service for scholarly research with thousands.
Sheet metal drawing is a more complex operation than cutting or bending, and more things can go wrong. Fukui test engelhardt test determination of the forming limit curves flc ldh test high speed deep drawing cup test deep drawing tests with blankholder quick release for earing test tests with preselected punch stroke deep drawing test at high temperatures. Hydro mechanical deep drawing press isf series action. Under certain conditions, this sliding will cause friction between the tools and the material. Microhydromechanical deep drawing of metal cups with hydraulic pressure effects liang luo 1, zhengyi jiang 1, 3, dongbin wei 2, xiaogang wang 3, cunlong zhou 3, qingxue huang 3 1. Comparison of conventional deep drawing, hydromechanical. Theoretical study on hydromechanical deep drawing process of bimetallic sheets and experimental observations article pdf available in journal of materials processing technology 2129. Ravi kumar department of mechanical engineering indian institute of technology delhi, new delhi 110 016, india corresponding author email. Microhydromechanical deep drawing of metal cups with. Study on micro hydromechanical deep drawing using finite. Journal of engineering manufacture, 2007, 221, 2, 155crossref. Hora, lnstitut fur umformtechnik, ethzurich submitted by e.
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