Responsible for the daytoday operations on assigned mechanical sheet metal tasks. Metal casting processes indian institute of technology. The standard sizes of metal sheets available in the market are quite large. Nptel mechanical engineering manufacturing processes i. Process design is the ensemble of operations leading from the design geometry to. This is nothing but cutting of sheets by shearing action. Lecture series on manufacturing processes i by prof. The quality of the cut surface is greatly influenced by the clearance. Advances in sheet metal forming technologies 65 special presses to stand for high pressures up to 80 mpa in the pressure chamber. So, we have discussed mostly so far about the bulk deformation processes. In sheet metal forming practice, we distinguish five basic modes of. Sheet metal forming is widely used for producing wide range of products starting from household vessels to aerospace parts, to automobile or aircraft bodies. These thin sheets are used to produce various types of sheet metal.
Nptel provides elearning through online web and video courses various streams. This lecture describes the fundamentals of sheet metal operations including working principle, mechanisms involved and various processes etc. Apply to sheet metal mechanic, supply manager, shop manager and more. Mechanics of sheet metal forming college of engineering. For obtaining straight, vertical edge during blanking, what clearance is preferred. Metal finishing systems l 18007472637 introduction to buffing buffing is the process used to shine metal, wood, or composites using a cloth wheel impregnated with cutting compounds or rouges.
The complex shape products with high strength and rigidity and small mass are produced in the process of separating, shaping and assembly operations. The measuring and marking operations carried over on sheet metal are discussed as under. Fundamental concepts of metal forming technology nptel. Sheet metal forming processes 3432 press for sheet metal press selection for sheet metal forming operations depends on several factors. Sheet metal drawing is a more complex operation than cutting or bending operation, and more things can go wrong during sheet metal drawing. This is a commonly used manufacturing process that helps in manufacturing the parts for tons of known and unknown purposes. Metal forming processes indian institute of technology. The principles of forming sheet metal and plate by bending the meaning of springback and how to compensate for it the types and uses of bending folding machines the principles of bending in press tools the use of press brakes and typical press brake operations. In low carbon steel sheet metal, the minimum radius of a bend should be one. A number of defects can occur in a sheet metal drawn product. The term pressworking or press forming is used commonly in industry to describe general sheetforming operations, because they.
Chandramouli associate deanresearch sastra university, thanjavur6 401. Definitions and classification of metal forming processes. When the sheet metal is going like this one of the first operation is you want to blank it. By physical removal of the material from the sheet, if the required shape of the component is obtained called as cutting or shearing operation. Sheet metal forming massachusetts institute of technology. Sold either as an individual tool or as a complete kit in a case with 7. Today we will be talking about the other processes a like a stretch forming, ironing, then here is coining, drawing, then a spinning, bending and one more process. Sheet metalworking terminology punchanddie tooling to perform cutting, bending, and drawing stamping press machine tool that performs most sheet metal operations stampings sheet metal products. Advances in sheet metal forming technologies 63 fig. What are the requirements for superplastic forming. Sheet metal forming processes and applications asm.
Sheet metalworking terminology punchanddie tooling to perform cutting, bending, and drawing stamping press machine tool that performs most sheet metal. By mechanical working processes, the given shape and size of a machine part can be achieved with great economy in material and time. A few among the most common applications of sheet metal parts are as automobile and aircraft panels, housings, cabinets. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Sheet metal operations other sheet metal forming processes nptel. Sheet metal operations other sheet metal forming processes. Sheet metal fabrication is a classification of manufacturing processes that shape a piece of sheet metal into the desired part through material removal andor material deformation. But before moving ahead to understand these operations, we should also understand what actually the sheet metal is.
Sheet metal forming with elastic tools is commonly used in. A gate cutter is a piece of sheet metal bent to the desired radius. So, in this lecture we are going to discuss about the sheet metal operations like bending, drawing or deep drawing, and other miscellaneous kind of sheet metal. Other machining operations shaping and planing a singlepoint tool moves linearly relative to the work part shaping a tool moves planing a workpart moves broaching performed by a multipletooth cutting tool by moving linearly relative to the work in the direction of the tool axis. A sheet formed part is usually obtained through a number of operation phases final surface intermediate surface each operation can be decomposed in several phases. Metal forming is possible in case of such metals or alloys which are sufficiently malleable and ductile. Different sheet metal operations with diagrams guide by tips. 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.
Following is a list of common defects during sheet metal operation, with sketches are shown in figure 1. Material with high strain rate sensitivity parameter, 3. But the required sheet size for making a component may be smaller and hence a standard size sheet may have to be therefore cut into several smaller pieces. Avoid large sheet metal parts with small bent flanges. Sheet metal operations cutting and related processes. Sheet metalworkingforming on metal sheets, strips, and coils. Sheet metal forming an introduction introduction sheet metal is simply metal formed into thin and flat pieces. Layout and fabrication of sheetmetal and fiberglass duct.
Shearing not a forming process but a cutting process. The operations performed on the sheets to get the required shape is called sheet metal operations. Anything thinner is referred to as a foil and thicker is considered as a plate. Marciniak the technical university of warsaw, poland. Greater the gauge number, thinner the sheet of metal. It is one of the fundamental forms used in metalworking, and can be cut and bent into a variety of different shapes. Sheet metal forming processes sheet metal procedural. Sheet metal is a thin sheet produced by rolling or hammering. Pdf document that has been purchased, the document will appear. Nptel mechanical engineering forming sheet metal operations.
Pulla reddy engineering college, autonomous, kurnool abstract. Sheet metal operations cutting and related processes nptel. Sheet metal, which acts as the workpiece in these processes, is one of the most common forms of raw material stock. Bending straining of a metal sheet to form an angle bend. Sheet stamping is the method of metal plastic processing in which the sheet and strip bars are used for product manufacturing fig. Sheet metal parts are some of the most important semifinished products. Sheet metal forming processes almustansiriya university. This practical and comprehensive reference gives the latest developments on the design of sheet forming operations, equipment, tooling, and process modeling. In this article, we will discuss the various types of sheet metal operations. Nptel mechanical engineering forming joint initiative of iits and iisc funded by mhrd page 1 of sheet metal operations other sheet metal forming processes r.
Continuing our focus on sheet metal forming, this issue of dfm guidebook focuses on design guidelines for bend relief parameters, distance between holes and bends and offset bend material when a bend is made close to an edge. Manufacturing processes i nptel online videos, courses. Here, punching and blanking comes under cutting or shearing operations whereas deep drawing and bending come under forming operations. Progressive tool design and analysis for 49 lever 5 stage tools h. 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. Sheet metal tools 1 roper whitney hand punch punches up to 14 hole through 16 ga. Design for manufacturability sheet metal guidelines. Sheet metal forming basics, processes and material used. Important casting terms nptel course on manufacturing processes i, pradeep kumar et al.
As a result, many other operations, such as machining, forging, and welding, can be minimized. Sheetmetal forming includes cutting and forming operations performed on relatively thin sheet of metal typical sheet metal thicknesses. Press working operations or sheet metal operations. Therefore the first step in any sheet metal process is to cut the correct shape and sized blankfrom larger sheet. Progressive tool design and analysis for 49 lever 5 stage. Mainly sheet metal process can be divided into three types. If you design sheet metal parts, you may know that bend relief is a notch cut made into the. Design for manufacturability sheet metal guidelines bends for the ease of manufacturing, multiple bends on the same plane should occur in the same direction. Drawing forming a sheet into a hollow or concave shape. Extensive knowledge of all hvac sheet metal systems installation. Typically, sheets of metal are sold as flat, rectangular sheets of standard size. The cloth buff holds or carries the compound, while the compound does the cutting. Press working operations are also known as sheet metal operations. In this article we mainly focus on sheet metal cutting operations and.
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