 Hello everyone, welcome to the second session of the course 3D printing. In this session we are discussing what is the need of additive manufacturing, what are the learning outcomes, the students will be able to describe the need of additive manufacturing, these are the content, first we will discuss what we have discussed in the last session and after that we will discuss the need of additive manufacturing. In the last session we have discussed like what is mean by additive manufacturing, with respect to the ISO 52900, the additive manufacturing means joining the material, the material may be the thermoplastic or may be the metal, definitely there is a advantage that the dissimilar material we can join, there are different types of conventional process like welding where we can't join the dissimilar materials. The prerequisite for the additive manufacturing that will be a 3D CAD model that will be the start of the 3D model data that we are providing to the additive manufacturing machine tool, there is one approach which is provided in additive manufacturing which is called as layer by layer approach, whenever there is a development of the product or the component that is developed by layer by layer approach. In additive manufacturing the name itself there will be addition of the material, there will not be any metal or material removal process, so this is not an subtractive manufacturing process or this is not the formative manufacturing methodologies like there is a forging or may be the soldering or there are different types of molding processes. These are the criteria that should define the additive manufacturing, there is a very simple statement with respect to the additive manufacturing, additive manufacturing is a manufacturing process where we are providing the 3D CAD model as a prerequisite after that there will be the development of the component by layer by layer approach by joining the material, there will not be any subtraction of the material in additive manufacturing. Now there are different types of processes by looking after we can say that these are the additive manufacturing processes but not, these are not satisfying the 5 conditions that we have discussed already, the additive manufacturing process always satisfy these 5 conditions. So for example this is a welding process, in the welding process we are not providing any 3D CAD model data, also there is somewhat metal removal process, after that 5 access CNC milling machine for the 5 access CNC milling machine we are providing the CAD model data as a input but here this is a subtractive process, this is a subtractive machine tool so that the 5 access CNC milling machine is not an additive manufacturing machine tool. After that electro disheveled machining, electro disheveled machining is a type of non-conventional machine tool, also there will not be any metal removal process in electro disheveled machining which is also called as EDM but we are not providing any CAD data to the EDM machine tool, centrifugal casting. In the centrifugal casting also there will not be any subtractive process but we are not providing any CAD data to the centrifugal casting machine tool, for example the application of centrifugal casting to develop different types of bearings with the material like the titanium base alloy or nickel base alloy in the submarine gearboxes. Injection molding, in the molding the shape of the die that will be taken, yes you can see the shape of the die that will be taken by the component, the molten metal that will be passed through the nozzle, yes there will not be any subtractive manufacturing or the any metal removal process here in the injection molding but then also one condition is missing that is we are not providing, we are not importing the 3D CAD data. After that investment casting which is also called as green technology, there are some of the 3D printing process which is also called as green technology, for example SLS, selective laser sintering which is also called as green technology. Similarly, investment casting is also called as green technology or the green process the parts those are developed in the investment casting which are called as green part or the green component, you can see the wax will be used as we can called as the material and we can reuse those material but there will not be any subtractive process or the metal removal process but here the 3D digital data we are not providing to the investment casting machine tools. Now these are the things that we have discussed in the last session, in today's session we are discussing the need of additive manufacturing, there are different types of criteria's in day to day world or in the competitive world, like there are some of the companies those who are working for the new products, they have not worked until now for those new products they are developing, so the time will be taken definitely different types of non-conventional machine tools they have to use, there are some of the companies those are working on the new product but already those products are available in the market, you can see the different types of criteria's, there are different types of companies those who are working on the product again but they want to modify, they want to edit with respect to the customer delight, with respect to the customer satisfaction, for that what is the requirement, the requirement or the need that is the additive manufacturing. In the additive manufacturing mainly there are 3 processes, design, production and the application, first we have to design, we have to develop the 3D model, we have to provide the computer edit design that is a prerequisite for any additive manufacturing machine tool, after that only there will be the manufacturing of the component with the help of the additive manufacturing machine tool, application means after developing the product which customer will use that is with respect to the customer, with respect to the customer we can called as application, at which condition, at which place that will be used which is based on the customer application, now what are the different components in this is called as product life cycle management cycle, with respect to the conventional processes. In the need of additive manufacturing we are discussing the 2 cycles, the product life cycle management with respect to the conventional process and the another one that is in the next slide we are discussing the PLM cycle with additive manufacturing, so always we are doing the customer survey and after that the new idea that will be generated for that we have to develop the 3D model that will be the part of the synthesis, to develop the 3D model with respect to the different we can called as computer edit designing softwares like the Katia software or may be Atodis fusion 360, whenever we are developing the 3D model we have to optimize that design for that there will be the use of computer edit engineering or finite element analysis, so just I will use the pointer here just give me a minute, so for that there will be the use of the finite element analysis, documentation and drawing, whenever we want to present any design definitely we are presenting that particular design with respect to the computer edit drafting that is called as drawing or which is called as documentation sheet not with respect to the 3D model, what is the advantage it consists of different types of views yes definitely it also consists of the dimension, so that the third party will understand what is that particular product after that there will be the part of computer edit process planning, what are the different raw material what are the different tools that we have to use, whenever there will be the decision that will be taken in computer edit process planning different types of machine tools like definitely for the CNC machine tools there will be the use of CNC program after the development of the product there will be the check by the quality control engineer and after checking the product the final product that will be developed with the help of assembly and it will be handed over to the customer, so this is product life cycle management with respect to the conventional process, now you can see in the additive manufacturing process definitely these three steps will be there that is design production and the application, but it does not consist of the four parts, so there will be the saving of the time because there will not be the requirement of computer edit drafting sheet yes this one after that there will not be the requirement of computer edit process planning, the raw material and the tool that will be used in the additive manufacturing that will be same with respect to the additive manufacturing machine tools, now the 3D model whenever it is provided to the machine tool yes what we can say that the additive manufacturing machine tool directly that will be taken the 3D model and there will be the development of the product by layer by layer manufacturing, CNC program that is also developed automatically and definitely there will be the checking of the quality control, the testing that will be done and the final product that will be provided in the hands of the customer, so we have discussed the need of additive manufacturing with the help of product life cycle management with respect to the conventional process and the additive manufacturing process, you can answer this question what is the meaning of 3D printing these are the references thank you