15 / 01 / 2018 | Videos

Making air vane motor



In our new project, which is a motor that moves with the energy of the air, the pleasure that we receive during this project is double as besides the joy we got during making it, there is also the joy of recycling a system which is non-functional anymore.  This happened when we collected pieces from a broken air conditioning compressor taken from a car and from that we made a pneumatic motor, which can be used in our future projects.

The type of motor that we made is called ‘air vane motor’ and it can be used in various pneumatic tools and systems. Firstly, we started making it by taking the rotor of an old compressor as well as the vanes, which were divided right in the middle in order to enable the rotor to spin within the cylinder. We, also took the bearing of the old compressor to enhance the concept of recycling. 

Then, we turned two aluminium papers sized 100 mm in diameter and 50 mm in thickness to make them the place where the bearings and the o-rings will be placed so that the rotor to be rotated without making any noise, and to achieve a smooth move and keep the air inside the machine when it’s activated. Further, a cylinder was placed between the two aluminium papers that was taken by a tube that is used for making hydraulic pistons and it has great preciseness and smooth internal surface to make the vanes of the rotor slide smoothly on the walls of the cylinder keeping the air inside. 

The cylinder was placed at the centre of the two aluminium papers while the nests of the bearings were made 9mm away from the centre. Therefore, the rotor of the motor is located off centre in relation to the cylinder as a result on the one point of the rotor, the vanes are completely closed while at the exact opposite side of it, the vanes are completely open. In this way, when the air is inserted to the cylinder it pushes the vanes that are completely open and when the rotor spins, the air is exerted from the cylinder as a result we managed to have constant air provision. This procedure happens constantly so the spinning is constant as well.

Finally, there are two holes on the cylinder that work as the insertion and the exertion and they can work in reverse in order to change the torque of the motor’s spinning. Certainly, this functional motor was not just made to present its functionality but also to show to the public how it works. Also, we are aware of the fact that if we used vanes made of carbon fibre, a lighter rotor and many other things would increase the performance of this motor. Although, we should highlight that at 8 bars, the particular motor reached an exertion in about 3000rpm and a sufficient torque and compared to the amount of money that we spent to make it, we are sure that it worth every minute of the procedure of creating it.

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02 / 11 / 2017 | Videos

Making propane forge



Blacksmithing is the ancient art that refers to the process of metal in order to make tools, objects, ornaments and various other things. It is still considered as a particularly, interesting activity and not so as a profession but mostly as a hobby as the state of the art equipment that it is used nowadays, makes the whole procedure easier and faster. Additionally, many professional and amateur blacksmiths impress us with their incredible creations which are undoubtedly works of art, pieces of valuable worth. 

Therefore, we came up with the idea to make a necessary tool used by blacksmiths and this is an oven that heats the metal placed in it in order to be bendable and easy to be shaped by the blacksmith. First of all, there are various ways to heat a metal such as using coal with air like they used to do it many years ago. Also, by using the phenomenon of induction, ovens using electrical elements or gas oven. This particular construction numbered 0074 is a gas oven that uses a burner of venturi. 

To start with, we took an old tank taken by an old compressor of 80 litres of air captivity. Firstly, we cut its two edges in order to make two ports that will be able to open to clean the oven if necessary. Next, we removed the parts of it that always stay open as there is the place where the objects are put in order to be heated.

Furthermore, on the top surface of the oven we placed six burners of venturi that we made them and they are capable to automatically absorb the amount of air that is needed to achieve the most desirable heating of the oven inside. Achieving the best heating of our oven, we also manage greater temperature, faster heating and better performance.

To make the burners, we used nozzles that are used for welding having a 0,6 mm hole. On these nozzles we used a thread to put the ‘butterfly’ that controls the insertion of the air in order to reach the best possible outcome. We made the procedure which the conduits of the gas are bifurcated to end up to the burners in such a way in order to use as much as we need from the six as a result to consume less gas if we are making something small.

Regarding the temperature of the oven, to keep the oven warm and prevent the increase of the temperature outside the oven we used ceramic fibre as an insulating material as well as at the bottom part of the oven, we added a special concrete that is tolerant in temperatures of 1400c as we wanted a hard surface at this place where the metals are located. 

Closing, we made a base for our oven to be at an ergonomic height. The oven was painted using fireproof paint tolerable in 800 c in black colour. Also, to try our oven, we made a knife during our limited free time. To sum up, we are very pleased by our oven’s performance as it is also very ergonomic. We hope to make many knives and other metallic objects in the future using our tool!

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26 / 09 / 2017 | Videos

Power Hacksaw



A very common machine capable of cutting metals is this week’s construction and it is called ‘power hacksaw’. Our version of ‘power hacksaw’ has not been applied any special modifications of the machines that already exist at the market. 

First, we started making our construction by creating its framework by metallic pieces of 12cm width and 6,5cm height. At this framework, we added the bases, on which we put a gear box taken from an old paper-cutting machine. The gear box’s role is to decrease the spins and increase the power of the motion transmission that leads to the slow and strong motion of the blade in order to reach the most desirable outcome of cutting the metallic materials. 

Moreover, to make the gear box move, we attached it with a dc motor 2hp taken from an old treadmill. Apart of its small size and its high power, another benefit of the dc motor is that using another device, we can fluctuate the speed of the motor and subsequently, the motion speed of the blade that is cutting our object at the particular time.
We can actually get advantage from this particularity as it gives us the opportunity to set the speed in accordance to the kind of metal. For example, for aluminium material we need faster speed compared to the iron that it needs slower speed and stainless steel which needs even slower speed.  

Additionally, using a 240v ac from our provision, we placed a regulator of volt and afterwards, passing the electricity over a bridge, we get dc electricity on our way out that powers our motor.  Therefore, while the motor is moving, the gearbox is moving and it is spinning in its exit, too.

However, to transform the spinning motion into a motion moving towards and backwards that is needed for the blade, we used a ribbon, which transfers the motion to the point where the blade is placed. Thus, the blade moves towards and backwards by using a linear bearing that is dragged towards and backwards on two motionless chromium-plated axis. At the front part of our construction, the making of a vice gives us the potential to hold the piece during its cutting. It can hold a piece up to 20cm width. 

Finally, to achieve a faster cutting, we made a basis exactly on the blade, where some kilos are placed so their weight puts pressure on the blade during the cutting process. As soon as the piece is cut, a limit switch deactivates the motor and the machine stops working, automatically. In this way, we managed to make the cutting process easier without being necessary to be there during the material’s cutting.

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06 / 09 / 2017 | Videos

Electromagnetic drill press vise


An electromagnetic vise made for our drill press is our 72nd construction. The usefulness of our vise is huge as most of the times the common vice is not able to hold the piece of material in order to drill it and its support is unstable, so the whole procedure is very time consuming. Therefore, making this vise we can hold bigger and smaller pieces of material in irregular shapes and thickness and still be able to easily drill without any special procedure to support them, in advance.

Initially, we took an old blade of 20cm x 55 x 1cm and we conglutinated two metallic angles 55cm long on it, so we set the spots where our vise would be screwed at the sockets of the table of the drill press. On the upper side of the blade, we shaped two metallic boxes, which are dragged to the whole surface of the blade and they are immobilized to the position we want.

Moreover, we put two modified transformers in each metallic box that we took from old microwaves. Then, we immobilized the transformers using a resin as well as straightening the upper side so that the surface that holds the objects, be completely flat. 

The power supply of these two electromagnets is 12vdc 20a. Also, the two coils in each electromagnet are attached the one with the other and each of them gets activated by a switch. Thus, we can use one of each separately or both of them together. 

Finally, we painted our construction in green and black colour. Also, we got impressed by its retaining strength. In addition, it is relatively a very cheap construction and it also encourages the recycling of old appliances. Moreover, it can be made in various sizes and shapes according to someone’s needs. Closing, a very useful electromagnetic vise for knife makers for instance, would be one that inclines in order to sharpen at the right degrees but it could be also used in many other cases.

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28 / 07 / 2017 | Videos

Dining Table 3



This time another dining table was made by the make it extreme team using the combination of metal and wood as the previous time. 

First, we made and designed a metallic framework which was relatively simple, nice and ergonomic. Our framework shapes a frame around the wood that is 6 cm wide while the legs that support the frame are 80 x 80 mm wide and 69 cm long. Therefore, the table is 75 cm tall. The four legs of our dining table are connected with two triangles at the bottom side and these triangles are connected with a square tube. The reason making these triangles besides the fact that is aesthetically prettier is also functional as the triangles gives the potential to another two persons to sit on the table and be able to touch their feet down. 

Moreover, the wooden surface that was placed on the top part of the frame, was made by a branch of an olive tree that was cut in wood. After processing and cleaning the wood from weeds, we conglutinated each piece of wood with the other in order to make a surface with dimensions of 90cm x 190cm.

Closing, we would like to say that the wood that was used for our table is olive tree because of its unbelievable beauty. Also, the spots that were empty resulted by the frames of the tree, were filled with epoxy resin. Finally, it is a time consuming construction and we should say that some complications and difficulties might arise in every stage of making it. However, this does not mean that it was not an important, constructive experience providing us much knowledge and pleasure.

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