WEEK 17

MECHANICAL DESIGN, MACHINE DESIGN

This week we have to make a machine, we have requirements that you must meet for the revision of our machines

Mechanical design

Group assignment:

Design a machine that includes mechanism + actuation + automation + application.

Build the mechanical parts and operate it manually.

Document the group project.

Document your individual contribution.

Machine Design

Actuate and automate your machine.

Document the group project.

Document your individual contribution.

Social work is for us as a Fab Lab Lima team and how the collection of little caps or hats at the Latin American level helps many people, especially children and disabled people with low economic resources. These campaigns help pay for their treatment or education or prosthetics among others.

That is why you will find teamwork here in the group task.

They exist in different Latin American countries such as Peru with the Angelito de Cristal Program

and Bolivia with the UNIFRANZ Foundation who have these incredible campaigns that they help many people.

In conjunction with Jorge from Bolivia from UNIFRANZ we thought of making a machine that separates bottle caps by color that has a simple mechanism and that helps to select faster and separate by color for distribution to companies and make new objects for injection, filaments, handicrafts among other things, the important thing here is to expedite these procedures.

SORTITA sketch

The mechanism is very simple:

The caps of different colors are introduced through the funnel that the machine has, then once inside it reaches a rotating platform that is directed by a servomotor that takes it to the position of the color sensor so that it recognizes the color and automatically the ramp that It is also directed by another servo motor, it will move to the container of the corresponding color and so it will happen with the different colors.

Let's do it:

The first thing I did was cut cardboard to see the real size of the pieces and if the model was feasible.

I then took the design to TINKERCAD so I could see what the machine would look like.

But we saw that the design needed adjustments and we decided to change to the next model.

Then the pieces were made in Fusion 360 and I went to laser cut them.

The parts were also 3D printed.

We first printed the piece that moves the caps through the sensor and then through the ramp, but we saw that it was very small and the caps got stuck, so we had to vary their size. and it finally worked!

We had some problems with the printing, it came off the printer table and it was a disaster, so I had to put an internal and external skirt to keep it from moving and that's it! I was finally able to print it.

Finally the machine worked and we could see how the caps go to their container of the corresponding color.

The 3D stl files of the pieces are here.

The files for laser cutting are here. here.