Transcript

Welcome to lecture 2 in the Laboratory Demonstration week of this course, “Design Thinking for Agricultural Implements” the first prototype that I would like to discuss here is the grain filling machine. This is a grain filling machine. What is the drudgery? What is the laborious thing when the farmers or the laborers have to fill the grain? Bags, they have to fill the bags using spade manually. Then they have to take the bags and weigh them. And then they have to lock the bags. So this machine can just fill the bags in one go. So how does that happen.

There are certain components, I will show you. This is outer frame. This is the inner frame. And we have the base here, this is the base. On this base we have the weighing machine. This is the weighing machine. How does that happen? Suppose the wheat pile is here, the big mountain of wheat is here. The pile of wheat is here. So this machine can be taken forward to the pile. Now once it has hit the pile of the wheat. Then the outer frame can be rotated. Now this portion is filled with wheat. This portion is filled with wheat. Now the wheat is transferring to the bag. The bag is will touch here. It is we will show you in the low fidelity prototype.

This is the final prototype we have developed. So this is the bag that is being filled. And while filling also it is being weighed. So we didn’t attach that, but we have the wire for that, we have the weigh display here; the display for the weight, that would be filled. Once it is filled, the bag would be detached from this and this would be loosened. Now the bag can be taken off from this position. And this machine can further we can keep on filling the bag in the similar manner. The best part in this machine is that we have made it foldable for transportation. While just removing one or two screws. While removing this; this machine can be folded and then taken to the place where it can be stored.

So the design for outer frame is like this. The view that is being drawn is an isometric view. So you have two links parallel, and in between we have a rod, that is used as the linking rod for rotating. This is outer frame. Similarly you have the inner frame. So this is a very broad drawing that we are making here. But while making the low fidelity prototype. Or the prototype using the bamboo sticks or using corrugated board. We will show you details of the component. This is the inner frame. Similarly we have the base.  Four numbers of chips that can be used to develop the base. We haven’t put the dimensions here right now, because this is the, very first iteration. But while developing or while making the component, we need to know the dimensions as well. While cutting the corrugated sheet.

This is the base and we have four number of pillars. Those can be put on this base and inner frame and outer frame are attached, using this pillar on the base. Now how did we develop this, we will show you a small model that is made of bamboo. So small sticks are used to develop this low fidelity model. So when we cut these sticks, we just need to make sure the size of the pillars. Has to be same, the size of the links has to be same. See it can be rotated in the same way. So when we fill this, if it is very high quantity, it will fill like that and it will flow. You can see, a small bag can be filled using this. For the same this is the first iteration, for the physical field of the model and the second iteration, we had the corrugated sheet.

You can see a little more precise model, than what we had in the six model. And also we have developed the wooden model. That is full fledged working model. If I call the machine that we showed, the big machine as a product. This is the final prototype. This is the high fidelity prototype that is made of wood. Also this is a bag. You can see a wheat pile. So when we fill it, it is taken forward. And if it is a big pile it will fill by itself. Now we are filling it with hand, and when we rotate it, it will fill the bag. So this bag can be taken out. Now also, there is a small model of the weighing machine down there, white color. This is weighing balance. So this is a high fidelity prototype. So this is also a folding machine. This is a folding machine. This is full-fledged working machine This is a high fidelity prototype, which is properly working, so it is also foldable see. It has all, everything like wheels, outer links, outer frame, inner frame, base, pillars, everything. How did we develop the corrugated board model. That we will demonstrate you in a few minutes. So how did we develop the model out of the corrugated board. We have cut these sticks already. We will just assemble them in front of you. So these are the sticks used for inner and outer frame. We have cut them almost into equal sizes. While matching them we cut them into equal sizes. This is the cross link for the base. Similarly we need one link in the center.

We are not mentioning any dimensions here, because we do not want you to go into the mechanical or dimensional accuracy part at this time point of time. We just need you to know that how do you get the feel of the model. Just to get the feel of the model we are cutting into equal sizes. Almost equal sizes. We are attaching them using this cellulose tape. Here it is also interesting to know that cellulose tape since it is not hand tearable. There is a tape holder here. And on the tape holder we have small teether that can be used to cut the tape. Sometimes taping has to be done twice or thrice, to give the strength, so that the model doesn’t break in between. But this is all craftsmanship. Once you start developing the models. Your finishing, your accuracy, your closest to the original model, that improves with practice.

Scissor is a very important cutting tool, that was here on the table but I did not mention in the first lecture. Scissor is also important tool. It needs to be always there, when you think of the cutting. So this is an inner frame. We need to have 4 pillars of equal height. Now these pillars are being attached to the inner frame. See how quickly this is happening. When you know specifically what you need to do. We have already developed the model using the bamboo sticks. Now we know where the components what to be fixed. So it is happening very quickly. The horizontal links in the outer frame are to be little larger than we have in the inner frame because the outer frame has to come outside the inner frame.

And this fit, if you talk about the fit it has to be clearance fit. Clearance fit means it has to go very loose, very, alliance has to be very high from the inner frame. Other than the cellulose tape, you can also use alpins. Alpins for the quick joining in the corrugated sheets. So now the frame and the base is almost ready. So we have two alpins, that we will use as the pivoting points here. This alpin is put here in the left hand side. So this works as a pivot, along which my prototype can rotate. So this is a low strength, low fidelity prototype, that gives you the feel of the design that we have made.

So this is a low fidelity prototype that we made out of corrugated board. So in this lecture we discussed about the grain weighing machine and the grain packaging machine that we developed in this laboratory, in the tinkering laboratory. We will talk about certain other machines, certain other prototypes that we have developed in this laboratory in the next lecture.

Thank You.