Week 13


There is less than one month before this semester ends and we are starting to shift our focus on to our project report. We feel that we have enough information to discuss our progress. We have made significant progress with our designs and will continue to tweak and improve details. We have ran FEA calculations and have made prototypes to test out our designs. With finals coming in a few weeks, we would like to make significant progress to our report each week and hopefully have our reports completed before the week of December 10th.

Guide Arm
I have added mounting points to the guide arm for the drive bogie, and have tested that it fits the drive bogie. Now the interaction team needs to add mounting points to the drive bogie. Last, there was also focus on completing the last individual writing assignment. The goal is to determine mounting points for the slave bogie next. FEA was also completed on the guide arm with these new mounting points, and two different loading scenarios were tested. The F.o.S was 2.8 for one scenario and 4.4 for the other.




Comments

  1. Eric HagstromNovember 20, 2018 at 9:12 AM

    Thank you for showing your work on the drive bogie. Looks like you guys got this coming together nicely.

    Akash: I may be wrong, but looking at the model above, it seems that the guide arm wheels may be tucked back too far and if the guide arm experiences extreme motion (to the left for example), then the metal mounting would hit the guide rail? Is this true, or no?

    What are your plans for manufacturing your components? In-shop? Or outsource? Or both? You both have enough experience on the welder, so please use it if you can!

    ReplyDelete

Post a Comment

Popular posts from this blog

Week 12

Image
Week 11/17/2018                                                                        Full-Scale Articulation and Brakes Articulation          We were able to get solid work models of early versions of the new slave bogie. we are currently working on trying to incorporate the new articulation system to the updated slave bogie. We will need to make some adjustments to some side panels of the wheel housing so that it does not interfere with the articulation system. We will need an FEA after the parts are cut to see if the structure still retains its strength. Pins are still being modeled. we might just use premade pins (if available) to reduce manufacturing cost. Guide Arm (Akash Sandhu)        For the guide arm, I was facing two problems. As discussed ...
Read more

Week 11

Image
Week 11, For this week the team continued to work on our individual components Articulation: currently redesigning thrust bearing carriage, need to consider there being an axle that connects both wheels together. currently designing pins that will lock in place for the steering rack, Guide Arm: currently working on improving on the design for the spring holder and wheel holder the Safety factor is really high attempting to decrease material and make design changes to improve design and optimize for safety of factor above 2, but not extremely high. images of the components are provided that show area where material can be removed. furthermore, the prototype should a concern a different loading concern when it comes off of switching tracks, the force will not all be perpendicular to the track, so additionally FEA was done with different loading conditions. minimum Factor of safety = 27 goal for next week start report Redesign the "arm" for the...
Read more

Week 10

Image
Week 10 this week the team worked on finishing up solid work models and conducted FEA on most of them Through rapid prototyping we were ale to see that our designs had a few problems that needed to get fixed before the final product. Articulation The problem with articulation structure where it would fail when loaded with 2500lb was fixed by adding a small section that helped reduced the moment arm caused by the bearing carriage. Shown in next figure.  The following figure shows the redesigned part. This new design greatly reduces the moment arm allowing the structure to carry more weight. This design has a factor of safety of 8.86 this means there is alot we can do to improve the design and reduce its weight from current 14 pounds. Since the bogie will not be using an axle we had to think of a new way to mount wheel housing to the new articulation system for now we designed this component which works as a carriage for the thrust bearing and also has mounting ho...
Read more