 Hello everyone, myself Professor Prithish Chittay working as an assistant professor in mechanical engineering department in WIT, Sallapur. Today we are starting with the classification of milling machine that is our first session of the course manufacturing technology. So what are the learning outcomes? So at the end of the session the students will be able to explain the classification of milling machine and also the types of milling machine. So these are the content. First we will discuss how actually the milling machine will work after that the classification of milling machine that are different types of milling machine and one type of milling machine that we will discuss in this session that is horizontal milling machine. So first of all we will discuss what is being by milling machine. So in front of you there is one schematic diagram of the milling machine here you can see it consists of a work table on which the work piece can be mounted or that can be placed here. So what is the difference between that is the lathe machine and the milling machine? In case of lathe machine the cylindrical type of work pieces that can be mounted in the lathe machine. In the job holding devices like may be a chuck or may be the mandrel or may be the face plate etcetera these are the job holding devices that can be placed in the lathe machine but in case of milling machine irregular type of work pieces can be mounted that can be placed in the milling machine that is the advantage of the milling machine. For example you are having may be the fuel injector or may be the any component of engine of the vehicle that can be placed on the milling machine for the different types of cutting operations. So this is a very much important advantage of the milling machine that irregular type of work pieces can be placed can be mounted in the milling machine. So it consists of the work table it consists of the work piece or the material or the part this is the milling cutter or the we can in the in the simple word we can called as a cutting tool here the milling cutter can be mounted on the arbor yes you can see there is a arbor that is a very a simple spindle that is keyed with the help of a key yes you can see the rectangular or the square key with the help of which the milling cutter that is fixed with the help of arbor this is the arbor that is the a hatching one that is called as arbor on which your milling cutter will be mounted and it is rotating here the work piece or the table and the milling cutter is having the relative motion that is having the feed but in case of you can see the work table or the work piece can be having the movement in the horizontal direction maybe in this way or maybe in this way and also the milling cutter is also having the rotating action like this maybe the anticlockwise or maybe the counterclockwise direction with respect to the direction of the work table or maybe the work piece but in case of lathe machine your work piece or the cylindrical type of work piece that is rotating in the headstock or may be the three jaw chuck and you can take the cutting tool maybe it's a turning tool or maybe the left hand turning tool or maybe the threading tool or maybe the drilling tool nearer to the work piece means only your work piece is rotating it is not moving in maybe the horizontal direction or maybe the vertical direction but in case of milling machine the work table or can be or maybe the work piece can be having the horizontal direction feed in this way like yes to the right side or to the left side now here the work piece is having the feed in the in this direction and also the milling cutter is rotating in the anticlockwise direction that is in the similar direction of the work piece so whenever so whenever when there will be the chip removal process so there will be the question like when there will be the chip removal process or maybe the metal removal process so when the milling cutter will have the contact with the work piece like this yes you can see this portion yes so just I will mark this portion just a minute okay so you can see this portion here so there is a contact between the milling cutter or the the tip of the milling cutter or the tooth of the milling cutter with respect to the work piece so here we can say here we can say here whenever there will be the relative motion between the milling cutter like this and and the work piece so in that case only in that case only there will be the chip removal process there are the different methods of milling like maybe the up milling or the down milling so with respect to that we can called as how the there will be the chip removal process it is in the increasing direction or maybe it is in the decreasing direction so this is the working principle of we can call it as milling machine hope you understand the working principle of milling machine we will go to the next page okay now just give me a minute now here you can see the classification of milling machine there are the different types of milling machine that is divided into maybe the column and knee type milling machine which consists of horizontal milling machine vertical milling machine or maybe the universal type of milling machine hand milling machine yes we are discussing in detail in upcoming sessions that is maybe the vertical milling machine or horizontal milling machine the another type or the another section of the milling machine that is fixed bed type milling machine where your bed or maybe we can called as the work table that will be fixed which is called as plane type or maybe the duplex head triplex head or maybe the profile milling machine after that there is a planar type milling machine after that there is another section that is production milling machine that is rotary type milling machine or drum type milling machine rotary type milling machine where you can provide the rotary motion to the work table also. Yes as we have discussed in the working principle of the milling machine where the job is having maybe for example in the horizontal direction yes the job is moving maybe in the right side or maybe to the left side yes but in the lathe machine the work piece is only rotating here the work piece is having the horizontal direction or it can be having the rotary movement so that you can have the different types of cutting operation maybe you can provide the angle to the cutting operation or maybe suppose you want to provide the different types of drilling operation to the angle yes you can provide in the milling machine there are the different types of special purpose milling machine for example thread milling machine gear milling machine or there are the different types of machine tools like the gear hobbing machine whenever you want to develop the teeth of the gears or the gears, there is the mechanism which is called as indexing mechanism with the help of which you can create the gears, there is a cam milling, the planetary milling or the table end milling after that. Now, there is one question in front of you, listen very carefully, what is the working principle of milling machine that we have discussed already? You can think about this question and just be ready with your answer, what is the working principle of milling machine. So, as we have discussed that it consists of the work piece and the work piece can be mounted on the work table, yes and the milling cutter that is called as the cutting tool of the milling machine and the milling machine can be mounted on the arbor, yes so that is the working principle of the milling machine. Now, the one type of milling machine that we are discussing today in this session that is horizontal milling machine, so with the help of a simple a diagram with some of the animation part, yes you can easily understood, yes what are the different components it consists of, that we have discussed like the work table, there is a feed handle here, just give me a minute, yes there is a work table, there is a feed handle, so suppose you want to provide the feed or may be for example, you want to provide the movement for the work table or the work piece, yes you can use the work the feed handle here, yes that is in this direction, so after that there is a over arm, yes over arm that will be the support for the may be the armor bracket, the arbor is attached to the arbor bracket, always remember that over arm will be having the very much support to the armor bracket and the armor, on the arbor, yes your milling cutter that will be attached that is in the rotating direction, yes this is this will be acted as a spindle, your arbor that is a hollow portion that can be mounted on the arbor, this is the cutting tool or the milling cutter, this is the machine vice, vice is the job holding device, we will discuss the milling attachment in upcoming session, milling in the milling machine, the machine vice is the job holding device, there is a cross traverse handle, suppose you want to provide the feed to the machine vice or may be the work piece, yes you can use the cross traverse handle, the knee, suppose you want to provide may be you want to provide the movement in the upward direction, may be all to the downward direction to the work piece, yes you can use the cross traverse handle and also the knee, there is a vertical traverse handle, yes means you can provide the movement in the horizontal direction or in the vertical direction to the work piece with the help of a knee or may be the cross traverse handle, so these are the references, thank you.