156B Week 8

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

• • New flow splitter design is being machined (Bottom half is 90% done, Tom started the top part on 5/21)

  • Testing will be done either this Friday (5/25) or early next week

Accomplishments from Previous Week

• • Machined bottom piece for flow splitter

  • Completed CAD design for upgraded flow splitter

  • Finished 2nd draft of report, fixing the numerous corrections given to us.

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

• • Modify CAD flow splitter design based on test results (Kuanren & Edwin)

  • Microscope test on flow splitter (Edwin)

  • Machine new flow splitter (Dylan)

  • Complete Teamwebpage, Poster (Haonan)

  • Complete Report Draft (Everyone)

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

• • Changed the design to have more clearance from the stage block and more clearance from the cutting mechanism

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

• • Widen the parts of the channel further from the outlet, since they don’t need to be narrow, and simplify the channel to make it easier to make a CNC program. (5/16 in person)

    • We implemented these changes, our channel is now much wider at the inlet and only has 3 90 degree turns.

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

• • N/A

Risks and Areas of Concern

• • Gas leakage due to improper epoxy seal between top and bottom piece

  • Misalignment due to machining error

  • Unexpected effects from charged gas that stays above the sample due to confined space created by the flow splitter

  • Low microscope availability

Resources or Information Required but not Available

• • N/A

Schedule

• • May, 25th - Manufacture First Two Layer Flow Splitter

  • May, 28th - First Flow Splitter Test

  • May, 29th - Modify Two Layer Flow Splitter Design based on test results

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

• • Working on second report draft

  • 50% Team webpage

  • Poster WIP