The material experiences plastic deformation to change the shape of the component and converted to the desired shape of the component. Electromagnetic forming emf is a non conventional metal working process that relies on the use of electromagnetic forces to deform metallic materials at high speeds. Stretching of the sheet during superplastic forming is much higher than with rolling and sheet forming. The first one is sheet metal cutting, second one is sheet metal bending or forming and the last one is known as deep drawing. In this article we mainly focus on sheet metal cutting operations and other two we will discuss into upcoming articles. Thank you nptel for making these lectures available for the entire international comunity. Hot working and cold working operatio slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Self reading for your interestself reading for your interest defects in metal forming processesdefects in metal forming processes and their remedies. Lecture series on manufacturing processes i by prof. Fundamentals of metal forming overview of metal forming material behavior in metal forming temperature in metal forming. Rolling is the deformation process of a metal that is widely used in the metal forming process. The ability of materials to exhibit extensive plastic deformation generally the elongation is over 200% at an elevated temperature t 0. Comparison of metal forming processescomparison of metal forming processes 34. Transverse sheet stretch forming press fett up to 12 independently controlled axes allow for the forming of leading edge and fuselage parts.
It provides a detailed discussion of specific forming processes, such as deep drawing, rolling, bending extrusion and stamping. Pdf civil engineering books huge collections subject wise free download. This article presents the technique of limit analysis, both upper and lower bound. Important casting terms nptel course on manufacturing processes i, pradeep kumar et al. Sep 25, 2011 fundamentals of metal forming overview of metal forming material behavior in metal forming temperature in metal forming. Metal forming is a manufacturing process in which forces are applied on raw material such that stresses induced in the material are greater than yield stress and less than ultimate stress. Metal in powder form is costlier than in solid form. Powder metallurgy pm is a metal working process for forming precision metal components from metal powders. Some mmc properties cannot be measured as they would be for monolithic metals. Manufacturing processes i nptel online videos, courses. Metal forming processes indian institute of technology guwahati.
Mechanics of sheet metal forming college of engineering. Unconfined type explosive forming a gas bubble is also produced which expands spherically and then collapses. Manufacturing companies producing metals supply metals in form of ingots which are obtained by casting liquid metal into a square cross section. Nptel mechanical engineering manufacturing processes i. Maintaining precise material flow characteristics is crucial for producing a highquality stamped part. Superplastic forming an overview sciencedirect topics. Metal matrix composite an overview sciencedirect topics. Metal matrix composites mmcs are a group of materials such as metals, alloys or intermetallic compounds incorporated with various reinforcing phases, such as particulates, whiskers or continuous fibres. Metal casting processes indian institute of technology guwahati. Nptel mechanical engineering forming joint initiative of iits and iisc funded by mhrd page 3 of. Mainly sheet metal process can be divided into three types. Lecture notes design and manufacturing ii mechanical. A first stage where the volume of the part is generated a second stage where the. Some of the original topics have been omitted or given in an abbreviated form in appendices.
The relative positions of bed and ram in the press are. This paper discussion will be made about the rolling process, the working principle of the rolling process along. Under the action of such forces, the shape and size of metal piece undergo a change. Nptel mechanical engineering forming joint initiative of iits and iisc funded by mhrd page. The author highlights recent developments of metal forming technologies and explains sound, new and powerful expert system techniques for solving advanced engineering problems in metal forming. Metal forming processes indian institute of technology. Bulk metal forming, sheet metal forming stretching. Once the certificates are printed, reprint of certificates with corrections will be done only by paying additional fees. Chapter 4 metal matrix composites princeton university. Property data given in this chapter are therefore given as ranges rather than as single values.
Metal casting processes indian institute of technology. Metal forming involves changing the shape of the material by permanent plastic deformation. Advances in metal forming expert system for metal forming. This paper discussion will be made about the rolling process, the working principle of the rolling process along with that the working principle of the rolling mills. The author has conducted research in metal forming and has taught the subjects of metal forming analysis and metal forming technology to the graduate and undergraduate students of iit bombay and iit delhi for a total period of more than 35 years, during which time, he also guided many ph. Metal forming and machining processes springerlink. Practically all metals, which are not used in cast form are reduced to some standard shapes for subsequent processing. In this article we mainly focus on sheet metal cutting operations and. Casting consists of pouring molten metal into a mold, where it solidifies into the shape of the mold. A line diagram of a typical pres is explained in the figure 2.
Various metal forming techniques and their analysis, viz. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Metal forming metal forming is a general term for a large group, that includes a wide variety of manufacturing processes. Metal casting ace engineering academy hand written notes free download. Nptel mechanical engineering forming joint initiative of iits and iisc funded by mhrd page 3 of 9 plasticity 1. Nptel mechanical engineering forming joint initiative of iits and iisc funded by mhrd page 5 of 10 temperature. Jul 27, 2009 lecture series on manufacturing processes i by prof. We are here to provides you the best study notes from best coaching like made easy, ace academy etc and lecture notes from best institutions like mit open course, iit nptel, crec tirupati, washington, middle east technical university etc. Plastic properties of metals are used during the process of metal forming.
Sheet metal forming massachusetts institute of technology. Principles of metal forming technology announcements. Developments in high temperature corrosion and protection of materials, 2008. J s campbell, principles of manufacturing materials and processes. The process involves stretching the sheet to a calculated yield point and forming it over a tool. Lecture 1 introduction to metal forming technology. Stress required for forming, yield or flow stress therefore depends on several factors, such as strain, strain rate, temperature etc. These manufacturing process som study notes will help you to get conceptual deeply knowledge about it. A press is a sheet metal working tool with a stationary bed and a powered ram can be driven towards the bed or away from the bed to apply force or required pressure for various metal forming operations. Metal forming processes, also known as mechanical working processes, are primary shaping processes in which a mass of metal or alloy is subjected to mechanical forces. Analysis and technology in metal forming 29 influence of strainrate i.
In this sheet metal high velocity forming, the electrical energy stored in a series of capacitors is. Forming nptel web course free ebook download as pdf file. Metal forming processes are characteristic in that the metal being processed is plastically deformed to shape it into a desired geometry. In recent years, enormous progress has been made in the analysis of forming of complex shapes using. Sheet stretch forming is a fast, economical, and accurate way to form a large panel from a metal sheet.
Pdf easyengineering team strength of materials handwritten classroom notes for ies. Luders bands can be eliminated by coldrolling the thickness by 0. Metal forming is the main method of making metal products and semifinished products. After converting nonporous metal into product form by metal forming processes, the mass as well as the volume remains unchanged.
More than 90% of smelted metal is processed by different methods of metal forming. Yieldpoint elongation lueders bands on lowcarbon steels and almg alloys. Carl zweben, metal matrix composites, contractor report for ota, january 1987. Sheet metal operations other sheet metal forming processes. For instance, toughness is an important but hardtodefine material property. Sheetmetal characteristics elongation the capability of the sheet metal to stretch without necking and failure. Two prominent methods of converting raw material into a product have been metal forming and machining. This process is also known as electromagnetic forming. Metal forming processes full notes ebook free download pdf. Superplastic forming involves stretching the material at least 200% beyond its original size, although the deformation can.
Exact analytical solutions for metalforming processes and operations are. May 07, 2017 mainly sheet metal process can be divided into three types. It is done by passing the strip of the metal between the rollers. Apr 12, 2018 41 videos play all principles of metal forming technology iit roorkee july 2018. It is particularly valuable for the economical production of complex shapes, ranging from massproduced parts. For each course, reporting of issues comes with its own deadline date and time check the exam scoreecertificate as soon as you receive our notification. Superplastic forming is a specialist process used for deforming metal sheet to extremely large plastic strains to produce thinwalled components to the nearnet shape. Find materials for this course in the pages linked along the left. The process was well established in the bronze age beginning c.
951 248 1357 280 487 561 54 928 1544 6 1184 1401 417 850 1099 1478 741 610 691 710 1447 125 790 1310 1242 1042 720 669 1037 370 1087 698 1302 1355 232 997 923 206 572 973 600 764 1243 1308 840 509 715 866