156B Week 9

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

• • The Flow Splitter Design is machined, was assembled on Tuesday and will be tested on the SEM on Wednesday morning.

  • Testing was intended for Tuesday, but assembly took much longer than expected.

  • Did a basic check on Tuesday to make sure gas flows through the channels

Accomplishments from Previous Week

• • Machined Top and Bottom Flow Splitter piece

  • Glued top and bottom piece together for testing

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

• • Modify the CAD design based on testing results (Kuanren)

  • Manufacture updated Flow splitter (Dylan)

  • Test on updated Flow Splitter (Edwin)

  • Complete Poster for Gas Injection Mechanism (Haonan)

  • Complete Report on Gas Injection Mechanism (Everyone)

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

• • N/A, Sponsor is in Europe until 6/11

  • He encouraged us over email to attempt making the design out of titanium, but we're not sure if we have enough time

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

• • Not enough time on microscope (5/23 in person)

    • This week we have Tuesday and Wednesday (possibly Thursday)

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

• • What if our design does not work? (May,23th 2018 in person)

Risks and Areas of Concern

• • Internal gas channel may be blocked by epoxy adhesive or PEEK chips

  • Difficulties in sample alignment

  • The design may not work as the CFD predicted

  • Charged nitrogen gas trapped by the confined design may interfere with microscope imaging process

Resources or Information Required but not Available

• • N/A

Schedule

• • May, 30th -- Test Flow Splitter on Scanning Electron Microscope

  • June, 6th --  Finish machining for the updated flow splitter

  • June, 7th -- Test the updated flow splitter

Budget (list amount spent and amount remaining)

• • PEEK, $200

  • Machining at CRMS, ~$400 (waiting for exact quote from Bob)

  • Grade 2 Titanium,  1 inch wide, 1 ft long, 1/4 in thick, ~$43 (McMaster)

  • 2 Uncoated Carbide Square-End End Mill, 2 Flute, 1/64’’ Mill Diameter, $65.94

  • $4291.06 remaining

Progress on Report and Webpage

• • Completed Second Draft for Report and Webpage