Jaspreet Singh

This week I started to make some engineering drawings for the braking system. I will be using the  drawings to machine the design using a lath and mill. The design will most likely be be fabricated in Makerspace located on campus. I will be getting help from some individuals to machine the design, as it has been a while since I last used machining tools.  Furthermore, I also worked on the essay that was due this week.

I was able to source most of my needed material this week. I stopped by at Campbell Metals in San Jose and picked up 6061 aluminum that will be needed for my design. I purchased 2 5/8" x 1 ft aluminum round rod for the top base and bottom base pieces. 7/8" x 2ft round rod was purchased for the moving rod inside the braking system, as well as the compression system. 1.5" x 2 ft rectangular stock was purchased for the brackets and electromagnet mounting pieces. I plan to start to machine my design late March as i have several midterms coming up next week.

I was able to finalize my design this week and plan to start machining at makerspace very shortly. Additionally, I received my springs and brake material this week from Mcmaster Carr. I will be purchasing my aluminum stock from Campbell Metals today. By Friday 03/08/2019, I will have 90% of my parts for my design. The other 10% are misc hardware that can be purchased from Homedepot and Dale Hardware. I plan to have my design built by late March/ Early April.

This week, I was able to completely redesign my braking system. I made some small changes which will help during the manufacturing stage. All the fabrication, manufacturing, and assembly will be done my myself. I am currently in contact with the central shop with several questions about equipment. As soon as I hear back from them, I will purchase all my metal stock needed. I plan to finish manufacturing my design by the end of March.

The braking system is undergoing some minor changes in the design to ease in manufacturability. The Braking system will be made from aluminum instead of steel in the original design. Since the bogie will be traveling only 2mph at maker faire, a smaller force will be needed to stop it. The new stopping distance is 2 feet. Currently, the 130 lb magnet has been purchased from Amazon. All other components except the spring will be machined by myself.

Our last presentation was given in this week. I also had a chance to speak with Dan and Ethan about my emergency braking design. Overall, Dan and Ethan seemed to have liked the Design. One thing Dan told me was that the brake material may shear off the metal pad backing upon deployment. This is something that needs to be tested and would be extremely difficult to calculate. Furthermore, the team is working on the final report as well. We saved all of our pictures throughout the semester so it should be easy to implement in the report.

In this week, I prepared for my part of the presentation. I was able to perform FEA on several parts in my assembly. My goal was to have a factor of safety of at least 2. Furthermore, we started to work on the project report and we are planning to finish it soon. I am looking to start my bill of material to insert into the final report as well.The pictures below are FEA of several parts of the assembly.