26 / 01 / 2023 | Videos

Making a double piston hydraulic cylinder



Even if we have made hydraulic pistons in many of our previous videos this one has some specialties.

While in the common ones we find one piston and two spots from where the oil can be inserted to make it move, in this video this piston has 4 spots to insert the oil as well as there are 2 pistons. The two oil insertions push the two pistons forward so the piston opens while it closes when the oil pushes the pistons from the opposite direction.

The reason we made this video  is that we find it useful for many cases. One piston can be made having two other pistons when we require more safety like in the case of the airplanes when its wheels going down. If the one piston of the two is damaged then the other one takes over to avoid any accidents. Another reason is when the piston with the two oil insertions moves the oil moves accordingly from both insertions as a result we are able to attach an additional piston on them in another spot like the lorries turn. A further reason is that we can generate greater powers with a shorter diameter as the force needed to push the pistons act cumulatively.
Closing, we really hope to use this piston in one of our future creations.

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23 / 12 / 2022 | Videos

Making a polygon lathe cutter mechanism



In many cases, a processed piece on the lathe needs to have some shapes in some parts of it not cylindrical shapes that a conventional lathe cannot create.

These shapes can be square, hexagons and generally polygons. These shapes are commonly seen in normal metallic pieces like screws, tool nuts, drive shafts and other. Therefore, for their making we use the lathe and then we make the spots that they have angles using other machines like the milling machime, the metal shaper, the surface grinder and other. Thus, in order to avoid using other machines which simultaneously do other tasks as well as saving some time and having greater accuracy, we decided to make an attachment on the lathe that we already use to make polygon shapes without the need to use any other machines.

Initially, we "borrowed" motion from the leadscrew for our mechanism which is responsible for cutting the thread on the processed pieces on the lathe. This screw which works as a motion transmitter is connected with the norton gearbox that is responsible for cutting various threads meaning that if we set the speed accordingly we can create threads in various shapes. Furthermore, using this gearbox we control how many spins the lead screw can make according to a full spin of chuck. 

After taking motion from the lead screw we transmitted it on an axis through two gears with 2:1 ratio. This axis transmits the rotary motion on our cutter. Also, it has cross shaft transition in its edges so while crossing it is enabled to move forward and backward the same time.

Also, the axis that is connected   with the cutter can be moved while spinning at right and left.
In this way, while our cutter is spinning the attached piece to chuck is also moving right and left along it as well as in front of it or behind it and vertically towards it.

Afterwards we made a spindle, on which we placed a cutting tool that has three carbide cutting tools on it. Having this tool combined the gears, we can create an octagon, heptagon, hexagon,pentagon and a square.
Using various other cutting tools and gears, a lot of other polygons can be done. The shape is made on the piece while the piece is moving against the rotation of the cutter which removes  material from the piece.

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22 / 11 / 2022 | Videos

Making a gasoline pulse Jet Engine



Watching various videos on youtube featuring various pulse engines, we decided to make our own pulse engine that we are going to place on a bike in our future project.

Having no experience on this particular thing as it is the first time that we are making it, we got some knowledge from an expert of this kind of things, Rocketman. Although, these motors theoretically are very simple to be made, precision is required to make some parts of them.

First of all, we used a 110mm stainless steel tube of 65cm length that is welded on a cone with 110mm diameter on one side while its longer side has 165mm diameter. This cone has 320mm length.

Afterwards, we welded a cylinder of 320mm on the cone  therefore our machine was made. At the edge of the cylinder, we applied a lid on which there is a rectangular hole 80x100mm from where the air is inserted to the machine. In this hole, we placed the reed valves that consist an inlet valve of air which functions automatically while the motor is working. This valve works as one way valve as it allows the fresh air to enter into the machine while it prevents the combustion gases to exit the machine so the pressure is forced to be applied in high speed from the exit of the machine where the 110mm tube is. This valve works with flexible sheets from spring steel which unfold towards one side. Behind the valve, we placed a hopper that improves the air flow during its entrance to the motor.

Under the motor we have put a fuel nozzle that sprays the petrol in the motor so we have their ignition caused by a constant spark which is approximately in the middle  of the cone. To feedback the fuel we have used a car pump and with a simple mechanism we control the quantity of the fuel that the motor accepts; increasing it and reducing it accordingly.

Regarding the ignition, we have used the sparks taken by a high voltage igniter. The transmission of these sparks is achieved by an ignition spark. Thus, this burning process is implemented in a great frequency and the gases that exit the motor create thrust so we get a motion in various vehicles.

Although, these motors do not have a great performance they are amazing not only functionally but also constructively. The mistake that we did on our own structure is that we have used stainless steel sheets on the reed valves while the ideal material would be the spring steel therefore the function of our motor is not completely normal but this is a false part that we are going to improve in the future.

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30 / 09 / 2022 | Videos

Making an Electric Powered Braking Differential


Having in mind to make an electric, chain vehicle, we started doing this project. 

First of all, choosing a differential system taken from a BMW car and a motor taken from an old, electric hand lift we collected the main elements of this creation. The differential system of the car is the part that enables the movement of its wheels and plays an important role to the normal function of the vehicle. Besides the transmission of movement from the motor to the wheels, it also regulates the different speed move among the wheels if it is essential, when the car turns.

Taking advantage of this function, we made our structure. After connecting the motor on the movement entrance of the deferential, we fastened both elements on the metallic frame. Next, we put transmission shafts and two disc brakes on the two exits of the differential, one on each side accordingly. The shafts are responsible for the transmission of the movement to the creepers. In addition, the disc brakes are used to enable the driver of the vehicle to make the transmission to each creeper selectively.

In this way, when we press the right shaft of the differential, the movement of the right creeper stops or decreases and the left one needs to be moved faster so that our vehicle can turn. The opposite happens when we press the right shaft as well.
Concluding, until we create this vehicle we need to solve various problems and to make other pieces like the creepers, the batteries and others. The first part of this vehicle is ready and it was such a pleasant manufacturing creation.


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21 / 09 / 2022 | Videos

Slotting Machine on a Lathe



Watching various videos on youtube featuring various pulse engines, we decided to make our own pulse engine that we are going to place on a bike in our future project.

Having no experience on this particular thing as it is the first time that we are making it, we got some knowledge from an expert of this kind of things, Rocketman. Although, these motors theoretically are very simple to be made, precision is required to make some parts of them.

First of all, we used a 110mm stainless steel tube of 65cm length that is welded on a cone with 110mm diameter on one side while its longer side has 165mm diameter. This cone has 320mm length.

Afterwards, we welded a cylinder of 320mm on the cone  therefore our machine was made. At the edge of the cylinder, we applied a lid on which there is a rectangular hole 80x100mm from where the air is inserted to the machine. In this hole, we placed the reed valves that consist an inlet valve of air which functions automatically while the motor is working. This valve works as one way valve as it allows the fresh air to enter into the machine while it prevents the combustion gases to exit the machine so the pressure is forced to be applied in high speed from the exit of the machine where the 110mm tube is. This valve works with flexible sheets from spring steel which unfold towards one side. Behind the valve, we placed a hopper that improves the air flow during its entrance to the motor.

Under the motor we have put a fuel nozzle that sprays the petrol in the motor so we have their ignition caused by a constant spark which is approximately in the middle  of the cone. To feedback the fuel we have used a car pump and with a simple mechanism we control the quantity of the fuel that the motor accepts; increasing it and reducing it accordingly.

Regarding the ignition, we have used the sparks taken by a high voltage igniter. The transmission of these sparks is achieved by an ignition spark. Thus, this burning process is implemented in a great frequency and the gases that exit the motor create thrust so we get a motion in various vehicles.

Although, these motors do not have a great performance they are amazing not only functionally but also constructively. The mistake that we did on our own structure is that we have used stainless steel sheets on the reed valves while the ideal material would be the spring steel therefore the function of our motor is not completely normal but this is a false part that we are going to improve in the future.

Check out our Tools ans Plans Here




















 
...
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