Analysis of metal forming process based on meshless method. Finite element analysis of sheet metal forming process 60 3. An analysis of metal forming processes using large deformation elastic plastic formulations jungho cheng and noboru kikuchi department of mechanical engineering and applied mechanics, the university of michigan, ann arbor, mi 48109. Numerical methods are used increasingly to optimize product design and deal with problems in metal forging, rolling, and extrusion processes. Metal forming processes include a wide range of operations which deform sheet or tube metal to form the component with the desired geometry. Sheet metal forming an overview sciencedirect topics. Machining processes, which include cutting, grinding, and various nonmechanical chipless processes, are desirable or even necessary for the following basic reasons. Metal forming processes full notes ebook free download pdf. Volume one, sheet metal forming fundamentals covers the principle variables of sheet forming including the interactions between variables as a basic foundation for the most effective use of computer aided modeling and simulation of sheet metal forming processes. Sheet metal forming processes and applications pdf download author. Mechanics of sheet metal forming college of engineering. Combining forging forming with alternative production technologies can enable next generation products opportunities exist to break the economic barrier of tooling and provide flexible and configurable methods it is and can be high value manufacturing really achieving advances in metal forming requires a total route to market.
Eulerian analysis of bulk metal forming processes based on. Ganesh narayanan, iitg metal forming processes metal forming. It provides the 3d coordinates of the components surface as well as the distribution of major and minor strain on the surface and the. Sheet metal forming processes and applications asm. Definition of tooling geometry sheet metal forming processes are the complex interaction between specimen geometry, tolerance, surface topology, etc. Cambridge core materials science metal forming by william f. Handbook of metalforming processes crc press book reflecting handson experience of materials, equipment, tooling and processes used in the industry, this work provides uptodate information on flatrolled sheet metal products.
Analysis of springback during forming of the element made of ams 5604 steel analiza sprezynowania powrotnego podczas ksztaltowania elementu ze stali ams 5604 springback poses a serious problem during the design of the sheetmetal forming processes due to di. There exists a considerable body of literature on the analysis of sheet metal forming process. The characteristics of the shop equipment for metal forming and technology of the main metal forming methods have been given in separate sections. They occur for a number of reasons including faults in original metal. Sheet metal forming processes and applications pdf download. Professor, mechanical department, nbn sinhgad school of engineering, pune, india. Cutting and forming thin sheets of metal usually performed as cold working sheet metal 0. For each primary class of processes, such as forging, rolling, extrusion, wiredrawing, and sheet metal forming, it explains how fea finite element analysis can be applied with great precision to characterize the forming condition and in this way optimize the processes. Analysis clearance 48% but sometime 1% of thickness too small fracture does not occur requiring more force. It provides the 3d coordinates of the components surface as well as the distribution of major and minor strain on the surface and the material thickness reduction.
Hot working and cold working operatio slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Analysis of springback during forming of the element made of ams 5604 steel analiza sprezynowania powrotnego podczas ksztaltowania elementu ze stali ams 5604 springback poses a serious problem during the design of the sheet metal forming processes due to di. Too large get pinched and cause an excessive burr clearance. Lowcarbon steel is the most commonly used sheet metal because of its low cost and. Finite element analysis of sheet metal forming process. Friction and lubrication 2 introduction metal forming uses plastic deformation to change the shape of metal workpieces materials metals plastic deformation external loads. If the compressive strain, on the drawing side of the forming limit diagram, is. Applied metal forming including fem analysis applied metal forming. The rigidplastic finiteelement method was used to analyze two new problems of metal forming processes. Wrinkling is one of the defects in sheet metal forming operations, it is produced by a compressive stress field.
Sep 29, 2015 comparison of metal forming processescomparison of metal forming processes 34. Metal forming processes indian institute of technology. Individual chapters cover all major sheet forming processes such as blanking, bending, deep drawing, and more. Metal forming analysis the introduction of numerical methods, particularly. Some physical defects in metal forming processes such as rolling and forging, defects in forging reduce its strength. Manufacturing companies producing metals supply metals in form of ingots which are obtained by casting liquid metal into a square cross section. Deformation processes have been designed to exploit the plasticity of engineering materials plasticity is the ability of a material to flow as a solid without deterioration of properties deformation processes require a large amount of force processes include bulk flow, simple shearing, or compound bending. Many small companies are required to manufacture curved products and shallow parts with fine details in a small lot size which leads to both a higher production cost per detail and a need for multiple tools. The introduction of numerical methods, particularly finite element fe analysis, represents a significant advance in metal forming operations. One of the main issues when implementing eulerian framework is how to define and update the free surface of the domain. Process modeling using finite element analysis is described in one chapter and discussed in all appropriate chapters. Most of the literature available on sheet metal forming focuses on the parameters that influence the quality and economic factor of the final product. In most numerical analysis of sheet metal forming processes, the yield surface is assumed to possess a pointsymmetry with respect to its centre, meaning that a stress state and its reverse state.
To be useful in metalforming analyses, the flow stresses of metals must be determined experimentally for the strain, strainrate, and temperature conditions that exist in metalforming processes. Forming processes rolling, extrusion, forging, drawing dr. Sheet metal forming massachusetts institute of technology. Pdf analysis of the industrial sheet metal forming.
Practically all metals, which are not used in cast form are reduced to some standard shapes for subsequent processing. He was a visiting professor at denmarks technical university in 199798. Recent developments in metal forming technology lead to the development of a new group of metal forming processes entitled sheetbulk metal forming. Design pursuing, nbn sinhgad school of engineering, pune, india. For each primary class of processes, such as forging, rolling, extrusion, wiredrawing, and. They include a very wide range of consumer and industrial products, such as beverage cans, cookware, file cabinets, metal desks, appliances, car bodies figure 9. Including fem analysis describes metal forming theory and how experimental techniques can be used to study any metal forming operation with great accuracy. Self reading for your interestself reading for your interest defects in metal forming processesdefects in metal forming processes and their remedies. The technique of sheet metal forming analysis requires a noncontact optical 3d deformation measuring system. Manufacturing process ii fundamentals of metal forming 1 introduction metal forming includes a large group of manufacturing processes in which plastic deformation is used to change the shape of metal workpieces. Manufacturing process ii fundamentals of metal forming 1.
The analysis of deformation in sheet metal forming is often based on the two principal membrane strains. To plot the forming limit diagram and to study the effect of various strain paths on formability 3. The term pressworking or press forming is used commonly in industry to describe general sheet forming operations, because they typically are performed on presses. May 22, 2018 metal forming processes with analysis 1. First, as being advocated by kobayashi and his col laborators 68701, the rigidplastic formulations in which the elastic deformations are assumed to be negligible compared to the large plastic strains, have gained a wide range of applications. Assume elasticplastic behavior for material m r 1k m y s e e e y s y. Draw beads a schematic illustration of a draw bead. Avitzur facebook introduction to sheet metal forming processes metal forming processes. This paper aims at scattering light on the recent research and developments in the sheet metal forming processes over the last two decades. Metal forming processes with analysis linkedin slideshare. In the flow formulation, metal workpieces are treated as an incompressible viscous nonnewtonian fluid. Upsetting is a basic metal forming operation used in most forging sequences. The methods most commonly used for obtaining flow stress data are tensile, uniform compression, and torsion tests. Metal forming includes a large group of manufacturing processes in which plastic.
This lecture describes the fundamentals of rolling process including working principle, calculation of various rolling parameters rolling force, power consumption, torque etc. These analysis are good test problems to verify the use of the meshless method as a simulation and design tool for metal forming applications. Where possible, the limits governing each process are identi. Several researches of the analysis of metal forming processes based on eulerian framework can be found. Bending, stretching and drawing of simple shapes are analysed, as are certain processes for forming thinwalled tubing. Advances in sheet metal forming technologies 63 fig. It addresses the processing and forming of lighttomediumgauge flatrolled sheet metal, illustrating the versatility an. Metal forming process an overview sciencedirect topics. That not only means selecting and characterizing the right sheet metal materials, but also method stage planning for all sheet metal forming processes which is boosted by numerical methods of calculation. The fundamental of metal forming theory, the theories of processes of rolling, forging and stamping as well as drawing and pressing extrusion have been given. Stresses beyond yield strength of the workpiece material is required.
Metal forming, third edition this book is designed to help the engineer understand the principles of metal forming and analyze forming problems both the mechanics of forming processes and how the properties of metals interact with the processes. Sheet metal forming processes recent technological. These defects, which may occur on the surface or be internal, are undesirable not only because of the surface appearance, but because they may adversely affect. The system analyzes, calculates and documents deformations of sheet metal parts, for example. The term pressworking or press forming is used commonly in industry to describe general sheet forming operations, because they. The ring test was developed to experimentally estimate the friction coefficient in metal forming operations. Bending and forming tools nageswara rao posinasetti 1 february 6, 2012 2 nageswara rao posinasetti february 6, 2012 sheet metal operations 3 nageswara rao posinasetti february 6, 2012 4 nageswara rao posinasetti february 6, 2012 bending refers to the operation of deforming a flat sheet around a straight axis where the. Metal forming processes full notes ebook free download pdf practically all metals, which are not used in cast form are reduced to some standard shapes for subsequent processing. Analysis of the industrial sheet metal forming process using the forming limit diagram fld through computer simulation as integrated tool in car body development. Handbook of metalforming processes henry ericsson theis. Including fem analysis describes metal forming theory and how experimental techniques can be used to study metal forming operations with great accuracy. Classification of forming processes there are a number of ways to divide up forming processes hot working, warm working, cold working bulk forming, sheet metal forming primary and component producing processes steady and nonsteady processes continuous and incremental forming processes.
It addresses the processing and forming of lighttomediumgauge flatrolled sheet metal, illustrating the versatility and myriad uses of. For each primary class of processes, such as forging, rolling, extrusion, wiredrawing, and sheet metal forming, it explains how fea finite element analysis can be. Sheet metal forming processes almustansiriya university. Review of various methods for experimental measurements of friction in metal forming processes.
Professor valbergs main fields of research are materials, metal forming, experimental deformation analysis, and fe analysis. Reflecting handson experience of materials, equipment, tooling and processes used in the industry, this work provides uptodate information on flatrolled sheet metal products. Appreciable residual stresses and warping can occur on the quenching of steel forgings in heat treatment. In this paper, a detailed theoretical treatment for a coupled thermomechanical finite element analysis of the sheet metal forming process has been presented. His work covers all main metal forming processes, including forging, rolling, extrusion, drawing, and sheet metal forming. There are a wide range of physical defects which occur during metal forming processes. Sheet metal forming is a costly manufacturing process that is widely used in different industries. Fundamentals of metal forming overview of metal forming material behavior in metal forming temperature in metal forming. Finite element analysis of sheet metal forming process 62 figure 5.
1039 1536 1512 1297 451 1590 603 1290 895 362 929 278 1504 336 245 87 614 1021 141 234 1135 220 710 954 650 701 365 1234 568 1030 900 1394 703 1031 1054 290 316