156B Week 5

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

• • Two designs have been decided for manufacturing. The team has been assigned to two groups for each design.

  • Collet Design (William and Tianyi) (Team 1)

  • Side Clamp Design (Jonathan and Raymond)  (Team 2)

  • Team 1 finished the analysis phase and moving to manufacture.

  • Team 2 still worked on the design and will move to manufacture this week.

Accomplishments from Previous Week

• • Made a Pugh Chart and decided two designs. (All members)

  • Adjusted design based on the second prototype to create more stability (Team 1)

  • Ran FEA tests on blade and shaft. (Team 1)

  • The shaft broke twice during physical testing due to torque applied to it, which is primarily related to material toughness. After talking to Tom, the design was changed again for manufacture purpose. (Team 1)

  • Made 3D print for the new design. (Team 2)

  • Selected material for manufacturing in the machine shop. (Team 2)

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

• • Finish manufacture for Collet Design by Friday. (Team 1)

  • Finish manufacture for Side-Clamp Design by Friday. (Team 2)

  • Ran physically test (cutting fruit or potato) next week. (All members)

  • Make demonstration to the sponsor for final design decision and possible improvement. (All members) 

  • Prepare Proof of Concept Presentations. (All members)

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

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

• • Evaluate each design based on the functional requirements. (4/25/2018 from Prof. Delson) 

    • Action: Pugh chart was created and two designs were selected.

  • Meet with James on Friday. (4/25/2018 from Prof. Delson) 

    • Action: Discussion was made with James. The team also took in James' suggestions for further improvement.

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

• • Collet design includes weak points that might potentially cause breaking. A possible combination can also be made for the socket design. (Team 1)

  • Hard to find hinges in commonplace markets that is small enough to fit our design. (Team 2)

Resources or Information Required but not Available

• • N/A

Schedule

• • Describe upcoming milestone

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • • $117 (For benchmarking)

    • $68(3D printing, not exceeding the free $100 budget)

• • Remaining:

    • $3383

Progress on Report and Webpage

• • Team webpage updated to contain all important contacts.