156B Week 8

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Currently waiting for the order of stainless steel tubes, delrin rods, and fitting to arrive.

  • Once the order arrive, the process of making the bushing will begin.

  • Fabricated and machined the top hinge with 2inches hole cut out at a 10 degrees angle

Accomplishments from Previous Week

• • Order of Delrin rod of 1.25", 1.5", 1.75", and 2" have been placed.

  • Purchase orders sent for the Stainless steel tubing from tube service and online metals.

  • Purchase orders sent for the fittings.

  • Load test on prototype legs with Delrin bushing.

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Machining Delrin bushing for tubes (Kwan & David)

  • Machining tube end out of aluminum (Steven)

  • Purchase orders sent for the threaded tube ends and the swivel feet (Kwan)

  • Purchase order sent for the truss elements (Steven)

  • Purchase order sent for the remaining fittings (Alex)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Off the shelf threaded tube end would not work well to attach the swivel feet since it does not match the ID of our pipe size. Therefore, it is best to fabricate our own tube ends out of aluminum and machine the inner thread.

  • The tube end where it meets the top hinge plate will be secured by nuts and bolts with bushing. 

  • It is recommended to use 3/8" thick aluminum for the shaker attachment plate for stronger stiffness and avoid any bending of the plate.

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• • 1/4 inch thread for the swivel feet is very strong and be sufficient in this design.

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

Risks and Areas of Concern

• • Machining for the delrin bushings, tube ends, and hinge plate with tight tolarence might be difficult but should be doable.

Resources or Information Required but not Available

Schedule

• • 5/20 - Purchase orders sent for the threaded tube ends and the swivel feet (Kwan)

  • 5/21 - Purchase order sent for the truss elements (Steven)

  • 5/22 - CAD model uploaded to the project website and update (Alex)

  • 5/22 - Meet with the sponsors (Group)

  • 5/23 - Purchase order sent for the remaining fittings (Alex)

  • 5/21-25 - Machining bushings out of delrin rods 

Budget (list amount spent and amount remaining)

• • Spent: $340 + 110 + 168 + 376 + 50 = 1044

  • Remaining: $406

Progress on Report and Webpage

• • Rough draft of the report submitted and reviewed with advice and amendments to be made