Hi guys, so, welcome to the next lecture of the course a quick guide for carrier for part design module. In the last lecture we have completed the most commonly used features from the toolbar of sketch based features. Now in this session we will start learning about this breadth of features like select chamfer etc. So let's get started. So go to the park design. Yeah, okay.

Right. This is one. Now let us have a certain component Say for example a cuboid for simplicity of unrest effort to maintain the simplicity of understanding or knowledge taking the example of a cuboid. Later on we will go for the complex examples once we are thorough with main things or basic concepts in Katia now exit workbench So, let us Patrick. Now let me let it be some say 50 mm now, this is what we have got a cuboid now, actually the this Phillips chamfer everything common dresser feature they're like something like you can say finishing operations or the gesture. Last but finishing operations you may say just before the ones that are performed just before finishing the final finishing.

Now, you'll see there are Some aesthetic aspects, some car bodies, aeroplane bodies, many other things. So from the perspective of design such as airplanes, car now present generation cars, etc, to have certain aerodynamic features, the sharp edges of the vehicle bodies or airplane bodies are avoided. We try to streamline the surfaces of the bodies as much as possible, at least for cars, or at least for lower high end cars, it's fine we are paying a lot of price well it is possible to do as much streamlining of the surfaces as possible. But for general day to day basis, normal cars are also given some proper touch to their bodies surfaces with a light curvatures instead of giving sharp corners. So two things are being there two things are involved. Three things are involved there.

One is regarding aesthetics and look of that. Another thing is stress concentrations longevity of the particular part increases once there are less that there is less concentration of stresses in it. Say for example, we are who those who have studied Strength of Materials subject or machine design subject they might know that sharp corners and it the points where cross sectional area reduces all of a sudden there is tremendous change of area of concern cross sections, the stress concentrations will be high such as V notches etc. And so, avoid that we use some curvaceous radius at the edges and corners. So, that is one reason why we do feel it's the fillers is the one way in which we can reduce that. Now, another one is chamfer that is like some finishing to that is also one way of avoiding direct sharp corners, but still there will be the angular Angular sharpness will be reduced, but still sharpness will be there in case of chamfers but prior to applying fillets applying chamfers or producing chamfered surfaces is easier and the nominees draft angle, another one is shell.

So, we will see different aspects of shell like for example, our trees fruit trees etc, you can see that is this thickness, there is some thickened material will be there with the hollow space inside them so that we can play some other objects in such a book trace cartons which carry mil packets, etc all those things, those all come under shell type of products. So, say for example, one by one we will study them. So, this is an object for us. Now, we don't want this sharp edge, we want a rounded edge here, then we can apply fillit if you want a uniform radius from this point to this point, then you just apply an edge affiliate. Here you absorb, say radius B phi i want 10 So, from me 10 minutes from this corner Here 10 m radius and here 10 embryos it will go into the new center it will be somewhere here from there some circular arc will come like this.

So, that's what follows. So, 10 here 10 here, you can observe that as a tangency that circle that will be found will be tangent to this edge and this edge. So, if you apply okay you will get like this. So, further material This is a sharp corner material is removed. So, if you want to have a look with different looks, you can have like this. So, that is one part say for suppose you don't want uniform full it, you want this radius of curvature at this edge or corner to vary at top and bottom edge just let it be 10 at the middle Let it be five and the curve that propagates back up then that is also possible.

Say for example, you want to make a change here. Then you have to Go for this delete that part delete that feature. Now again let us try out a fresh no go to and select this edge. Now go for variable radius split. Now see here by default it is taking tenement enema from first to last Say for example, here you want 10 year you want 10 fine, but in between if you do direct okay what happens is uniformly it will take 10 throughout the 10 radius of curvature will detail throughout the thickness or height, but what you want is five in the middle at midpoint then your points selected is two points that is this point and this point. Now you can select third point in the middle say here somewhere between whatever point positioning is there you take it now, there again Brady system so it shows that here also radius of Korea Have the filter button here are certain there are certain now you would like to change this change it to says five then see the preview or you can say okay directly.

Now observe here, this is filtered from here to here this is a total filtered, but variable radius is variable here it is 10 this gradually decreasing to five mm radius here and again it is gradually increasing to time radius here, this change this curve which are follows three dimensional that is cubic curve, you can observe here it is cubic nature variation is cubic if you want to live here that is also possible then this curve is linear variation will be there. So, that depends how you want So, depending on the type of structure and type of element you want, you can create the things design the things that is one part another one and the generally used are only those two other things are not that much necessary to discuss. These things now, next one is chamfer This is rounded rounding the corners. Now this one is reducing the level of sharpness chamfer chamfer say it has taken this direction by default from this direction to what extent of angle you want to have a chamfer and say for example 45 degrees then otherwise you say 30 degrees then you observe 32 from here 30 degrees means this is 90 degrees here, so, here 30 degrees, so, here it will be 60 degrees observe that So, sorry it is not visible because I have taken the lens to be set and then it will be clearly clearly visible.

Then see here our default direction was taken this site So, with this angle this edge, this chamfer line will make 30 degrees. For example, if you make 60 degrees with this edge, this will make 60 degrees. So, 45 degrees you can adjust as per your request generally four to five degrees is a standard followed everywhere. So, that is chamfer. Now, draft draft actually used for specific reasons wherever required, such as removing and fixing, dropping out like design of dice in forging machines. So, that insertion of our punching of dye into the material and taking it back is easier, such as another example is in castings we use drafted shapes or drafted walls that means, angle will vary that that wall will be inclined to the vertical direction at certain angle.

So, So see an example say I'm certain this face I want to draft it at an angle, select draft option. Now, the direction will be drafting in that direction. Say for example, I want this to be 10 degrees of general draft is given some two to five degrees only to exaggerate and show you how it is very, I am giving 10 degrees but in general 10 degrees is never given. It's very rare case a selection neutral element, this element will be taken as the standard one whose dimension will not be changed from that the variation will go on and the other part will increase or decrease itself. Now, since that is the direction for example, let's see how it varies. This I'm selecting as a neutral plane.

Now the bottom face, the bottom face will if this is the toughest and taking as a neutral, the bottom this is a vertical wall with respect to vertical integration inclining like this in this way. So, dimension this dimension of the bottom part will increase and adjusts itself such that the angular angle between the vertical and the final position of the wall is 10 degrees see here I hope you are able to clearly observe it. So, that is how draft is applied. So, this top one is the exact surface or actual with this bottom one will increase its length such that this line this edge will be at 10 degrees with respect to the vertical because that is what we have given as a draft angle. So, another one is shell. So, shell shell components and once I apply you will be able to understand set default thickness the thickness of the walls inside thickness inside from inside That'd be some fire mm outset it can be zero that means we are not going to increase the material outside it will stay as it is, but inside we will you fire them along the boundaries.

No faces to remove no selection I don't I first suppose I want to remove this face. So toughest will be removed you will get something like this is a shell component. Now you want this hollow space inside but you don't want to get it removed open surface you want to close the surface like this hollow component enclosed completely. That means no faces removed. Then you can go back and here you can this face actually I was deleting removing the top surface that's why that's why you are able to see that. This is a hollow surface this is a hollow container type of material.

Now for suppose you don't want that you want it to be hollow from inside but To offer appearance purpose externally want to be solid, then in that case you can remove this option this one no it means that no face is selected which needs to be removed darkness all faces exists, but internally it is hollow. Now, if I show you anyone, no one will be able to say whether it is solid or hollow, but actually it is we only know the designer who is designing it knows that it is hollow from otherwise, if you are well versed with Katia by looking at this shell option, you can understand that there is hollow Otherwise, there will be certain option called dynamic sectioning. I will show you that also. With that help us that we can definitely yeah this is dynamic sectioning. See, once I'm in such providing section at certain place now, you see that this is this one, that green mat section that you clean a type of colored section is the actual material this insert what is hollow part that is dynamic section actually is another part there are different sites trying to show you the difference or sorry okay see from different aspects and try to show you this is what it is hollow part this is actually the full part.

Once I'm taking this dynamic section it is a see here. So, inside it is like the hollow but external appearance will be solid. So, that is how it is. It's okay now Desert the desert be selected. Now fine. So, two things we three things we learned four things we learnt in this video lecture one is fill it and applying chamfer and is another one is draft Another one is this shell right.

There are other things such as thickness tap and remove face but these things we use very rarely in this thread and we may use sometimes say for example, here we are applying certain hole and we want to tap internal threading, I meant to say internal threading there in that case, we can apply this one for example, say actually I already say for example, I already have a particular hole directly by applying hole option also, I can apply internal threading like threading given going to thread definition, I can select thread diameter, hole diameter etc. Otherwise, I will just provide a hole Hear up to the last say not blind it is up to the last Okay. Now this is a hole. So, I can select the I can apply this wherever it is what is that option there are some features or wonder features or features here tap now I want tapping not threading threading will be done external surfaces on external surface stopping will be done on internal surfaces.

So, I need to select lateral surface lateral surfaces the lateral surface cylindrical surface is showing us a warning or not it's not actually warning it is prompting us to use direct Get the whole command which I already showed you how to provide it tapping using the whole command directly we are trying to apply with this as a limiting face will be this one. So, allowing this filled with a boundary for this whole along that it has to tap along the direction of this hole. Now, that said that diameter is 11 mm thread that is fine among the diameter so and so, non standard and symmetric in which to insertion according to standard is 6.91 sir Okay, we will do that, then fine, no right handed or left handed Everything is fine. It is done that doesn't support diameter. Tab diameter must be greater than support barometer Okay fine.

Now fine. So, you see that it is actually but for the appearance purpose you are not able to see the threads inside you are only able to see a smooth surface but actually it is threaded that thing you will be only able to know if you are a designer and you are well versed with ktr here you will see the options threaded. So, when you see this and when you go there, this particular hole is getting highlighted. That means that this is a threaded hole not a normal hole. So, if you want to have a threaded appearance in actuality want to see as if it is threaded then there is some other alternate way to observe that those things we will learn later that is a bit advanced version. Now for the basic we will go step by step so here this is a threaded hole in action, but for appearance purpose only, it is not we are not able to see the threads.

It is As it is appearing as if it is smooth surface. So, that is as far as this is concerned that just use the tap option for this internal holes, if it was a cylinder and externally I want to thread it then I would have used it the third option right. So, that is part of grass of features. Now, that is all in this video in the next lecture we will go for the transformation features this one. So, we will learn about translation rotation etc. So, what are the things what are the possibilities we will not learn too, apply this patterns, rectangular and circular patterns etc and mirrors and also in sketches.

We will try to cover if possible. We'll try to cover these options operations trim, the nice chamfer and this corner etc, dismissal all those things, whatever is possible In some 1520 minutes in the next session we will try to cover. So thank you for being patient and listening this lecture. So let's meet in the next session. Thank you