 Hello everyone, myself Prof. Preetish Chutte working in mechanical engineering department in Walshchan Institute of Technology, Solopur. In this session, we will learn a new concept which is called as data exchange format. So, in the last session, we have discussed the one concept that is what is the need of standardization process in the CADCAM software. So, the data exchange format is regarding the course CADCAM CA. So, what you are learning? So, at the end of the session, the students will be able to apply the CAD fundamentals like geometrical transformation to the industry problem because the data exchange format is the part of geometrical modeling or may be the geometrical transformations or may be the application program. Also, you can analyze the application of the geometrical modeling. So, what we are learning in this session? First, we will see what we are learning in the last session. After that, we will discuss in detail data exchange format. So, the standardization process always needed in the field of CADCAM software. So, there is a use of different data exchange format files. For example, there are different types of data exchange format file which is in front of you like GKS which is a basic file. After that, IGES that is initial graphic exchange specification, DXF drawing exchange format, STAPE, DMIS which is regarding, suppose we are dealing with the device like the VDI or may be the VDM that is virtual data interface or may be the virtual device metafile. Now, the standardization that is required in the CADCAM software which are having different types of steps or may be the cycle. For example, it consists of may be the graphic database which will be work as an library. It consists of different types of tools, the toolbars, icons with the help of which the user can develop a 2D model or with the 3D model of any mechanical component. It also consists of may be the application program. The application program is interconnected to the graphic device and the graphic function. Graphic function consists of interactive computer graphics and all these things together which is connected to a device. The device will be act as an input or for example, the graphic software which we can install it in the device like the computer system or may be the laptop and for those there is a requirement of data exchange format. One basic data exchange format which is a part of standardization process which is called as graphic kernel system which consists of different types of functions. For example, polyline. Suppose you want to draw a line, you want to draw a multiple lines continuously. Yes, you can use the polyline. Polymaker. Suppose you want to provide the color. In that case, you can use may be the polymaker. You want to draw a different geometrical entities. We can use the generalized drawing permatives. You want to type some letters, text, words or maybe you want to type symbols. Yes, with the help of text, you can write it. You can create the part list, name plate and the bill of material in the computer-aided drafting sheet with the help of text. Fill area. Suppose you want to provide maybe the color or maybe the material in the particular area. Yes, you can use the fill area. Now, there is one question which is in front of you. What is the use of data exchange format? Yes, you can think about this question. Yes. As we have discussed earlier, yes, there are different types of data exchange format. So the use of data exchange format will be to import the different, we can call it as a different types of files from one software to the another software. For example, I want to take a 3D model software into the analysis software or maybe 3D model software into the hyper mesh software or maybe 3D model software from one modeling software to the another modeling software. In that case, you will require the data exchange format. Whenever you will use appropriate and correct data exchange format, there will not be any problem whenever you are importing or moving a one file into the another file of the software. Now, so what is meant by data exchange format? So with the help of one example, we will discuss this particular, we can call it as one particular example or maybe the diagram we will discuss the data exchange format. For example, maybe yes, suppose this is a one system where there is a 3D model software, yes, there is a 3D model software after that and you are performing a 3D model into a Katia software like I will just write a cat like the Katia software because in the Katia software, whenever you will save the file, that will be saved with the help of .cat file after that. Suppose I want to import this 3D model file into another modeling software, listen very carefully, this is very important concept. So suppose I want to import this 3D model file into maybe solid works, yes. Suppose without using the data exchange format, you have imported the Katia file into the solid bus, yes, there will be loss of data, maybe the dimensions will not be there or maybe one of the surfaces will be deleted, yes it may happen because you have not used the proper data exchange format file. Now suppose you want to import that 3D file, 3D model file into the solid works, yes, after that maybe suppose you want to import this 3D Katia file into maybe the machine software, yes, we are having the different machine softwares like for example, I will take one example like the hyper mesh, yes, just I will write the hype, yes hyper mesh is the software with the help of which you can create the machine, machine means to, this is the discretization process, we can create the nodes and the elements of the particular surface, after that suppose this hyper mesh file that is machine file, you want to import it into the analysis, analysis software, suppose this is my ansys, ansys as in for example, analysis software, yes I will write the ans, yes this is the particular file, now, so this is the particular importing, we can call it as the direction, suppose I want to provide the 3D Katia file into the hyper mesh, hyper mesh file into the ansys or maybe the 3D Katia file into the solid bus, but whenever you want to import, very important concept you must use the data exchange format file, extension, very important we can called as extension that is called as dot I G E S, dot I G E S that is initial graphic exchange specification, dot I G E S is a very important data exchange format file which will be needed whenever you want to import the Katia file into the solid bus file, Katia file into the hyper mesh file or machine file into the analysis, yes this is a very important we can called as data exchange format, another we can called as the direction, suppose I want to, yes in the ansys software also you can provide the machine, yes, so I want to import the 3D model of the Katia software into the ansys, yes we can do that or for example, I want to import the solid work file into the ansys software, yes I can do that or maybe the solid work file into the hyper mesh software for the machine file, yes and all these things which is only possible with the help of data exchange format, the advantage of the data exchange format will be the compatibility and this compatibility is only possible with the help of data exchange format file or which is also called as extension. So, for example, you have created the 3D model in the Katia software, you have to save that particular Katia file with the help of dot I G S and that dot I G S file, you can open it in the solid works, you can open it in the hyper mesh software or maybe ansys software without losing in the data, yes without the loss of data, you can open that file each and every dimension surfaces, inner surfaces will be there for you, so that you can go ahead for the further process or maybe the post process, post process means maybe you can provide the machine or maybe you can provide the analysis, it may be structural analysis or maybe the static analysis, yes with respect to the application, yes. So, vice versa, suppose there is a requirement to again, suppose there is a requirement to change the model to modify the model, yes we can go ahead with that. Suppose I want to provide the machine file or maybe I want to change in the solid works files, yes I can do that. Suppose I want to change in the solid works file with respect to the ansys software, yes we can do that. Yes, so this is the importance of data exchange format file, this is the importance of data exchange format file. Now, so the data exchange format that is a communication between the different application program and the hardware, there is a linkage and the connectivity between the different softwares, we can avoid the repetitive work. Very important concept that is initial graphic exchange specification, yes we will discuss initial graphic exchange specification, drawing exchange format and D M I S. Whenever you want to transfer the entire product which consists of the information regarding the design and manufacturing, we are using the I G E S. There are different sections like the start section, the parameter section, directory section, global section and terminate section, start section. So, which this section will provide you the readable file for the post processing. In the parameter entry which will provide the geometrical entities and the dimensional types. In the directory entry which will provide the rendering properties like suppose you want to provide the color or maybe the material. In the global section, the details regarding the product, who is developing the product, name of the company, the date of the product or the drafting standards will be provided in the global section. In the terminate section, the export choices in which as per the convenience of the data will be edited, well the file will be transferred into the another software. These are the references. Thank you.