Sixth Week November 5-9th

The last week, we discovered  an error in the gravity center calculations. As we did not have enough time to correct it, and as we have been so busy during this week, we correct it the friday. First of all, we distribute the bend into 15 pieces and after that we discovered that instead being 15, were 11. As we have thought that were 15 pieces, the total perimeter of the cutting was bigger than we need it.

On the other hand, we mistake some mistakes at the time of calculating the bending perimeter. We put as reference the hole bending and we only had to put the thickness of one line.
We thought that the force of the bending and the cutting was the same but this is not true because a cutting operation, needs 80% more force than a bending operation.

The numeration of the pieces

After correcting this big mistakes, we recalculate the total perimeter of the piece. To calculate this perimeter, we sume the cutting perimeter to the bending perimeter.
As you can see in the first picture, the hole perimeter of our piece is 741mm and before correcting the mistake was 969mm.
 After correcting all the mistakes made during the last weeks, we applied the formula that appear in the photopraph. To finish, the gravity center is 3,4mm desviated from the origin.

Axys systems

During monday, we start creating the axys systems of our die´s adaptator in catia. Then, we will use this axys systems to colocate all the plates in this adaptator. This plates needs to have some parameters and relations because if we make any mistake while we design the die, we would change or solve the problem without starting from the beginning again. Apart from that, during monday, we start to introduce some plane references to the axys system. We are going to use this planes to know how much space the die provide us. To make sure that everything is going well, we had to look at the parameterization of the plates. Seeing that all responded well to any future change, we went ahead

The colums and the caps 

During thursday, we retake the tree design in Catia and we inserted some colums in the lower plate. To do this, we create two parts, the first one to pad the sketch and the second one to pad the column in the Y axys. ( vertically). To finish it we create a pocket inside column to make a hole in the lower plate.

To finish with the assembly made during this week, we chose in a catalogue called "UNCETA" some caps to introduce in the colums. We did the same steps to introduce the caps into the assembly design. The unique change compared with the last paragraph mentioned, is that in this case the hole was created for the colums could pass from the caps. 

The canon assembly done in Catia

With Julen we created some different pieces and after that we did an assembly with all of them. During the creation of the assembly, we learn to use some different Catia tools such as the relations. The relations, are used to put together different faces, axys or whatever you want. Besides that, we fixed some pieces with an icon with looks like an anchor. We learned how to use the library that Catia has. In this library, you can find different commercial pieces such as screws or washers. Finally, we created the plane of the assembly in an isometric view and apart from that we create the assembly exploded view too.




During tuesday, in Nagore´s class, Asier De Miguel, explained an AMFE that Garita supported him. This AMFE belonges to a piece that is made in Garita, and is used to give transmission to the car wheels. In this AMFE, we look different problems/mistakes or troubles that can occur since the raw material is being transported to the company until the piece is finalized. Some of the common mistakes that can appear during this process are the aparition of burs, deformations and measures out of tolerance. Apart from looking the AMFE, we see the plane of the piece and a control pattern that is provided to the operators. In this control patterns, apeare some common mistakes that can occur and how to check if the piece is correct or incorrect with images and photos.

Piece plane

Mechanising control pattern

AMFE excel

During the english class, we did some exercises. In one of them, we read a text about the steps of doing a car and after that, we did a exercises. Apart from that, we listen a conversation between a teacher and her students. In that conversation, she told them about some studying methods and give them some advices to study in a better way. After listening the recording, we did some questions about the conversation. Moreover, looking ahead to the subject of Iranzu, on wednesday, we agreed that the group presentation we would do on 16th, Friday, in English. For this, we are going to do a prezi, which we have started doing this Friday in advance of a week.