Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Finished set-up and performed Sound Testing.
Created a mechanism for the Steel Die Cut.
Laser Cut and 3D Printed Components from CAD Models for linkage mechanism.
Talked with Tom and Ian about machining die/punch
Accomplishments from Previous Week
Finished a protocol for sound testing and found soundtracks to simulate different heartbeats and lung sounds.
Performed test and decided which material to use with the best range of frequencies/cost/availability.
Designed a tape cutting mechanism.
Improved CAD Models.
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Make the Steel Rule Die (or a temporary version of it) and test the cutting mechanisms (Aliya and Ngoc)
Test the quality of the cut with a punch with the shape of the negative of the die, a rubber punch, and potentially a lever as a mechanical multiplier of force when punching (Aliya and Ngoc)
Assemble linkage mechanism (Aliya and Ngoc)
Start prototyping and troubleshooting (Aliya and Ngoc)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments
The sponsor was happy with the current design and working schedule (April 13th , conference call)
Instructor Comments from Last Meeting and Actions Taken to Address these Comments
Research on Steel Rule Die Mechanism with rubber and how to apply to the project (April 16, OH)
Use of rubber with different durometers (April 16, OH)
Consider using a lever (April 16, OH)
Action taken: made a CAD model of a potential design after talking with Ian form the machine shop
Comments from Other Students in the Class
Pay more attention when using the motor to unroll the tape ( April 11th, presentation)
Risks and Areas of Concern
The tolerance of the die/punch.
The tape may stick to the punch. (Consider non-stick material: UHMW)
Potential need for guiding pins/linear rolling bearings.
Accounting for different orientations in which the stethoscope might be pushed
Volume of rubber inside die: as push down compressive force might make rubber push hard on the die walls causing it to potentially deform.
Resources or Information Required but not Available
N/A
Schedule
Machining and 3D print all the required components (04/23)
1st Prototype (05/02)
Device materials selection/production methods (05/16)
Budget (list amount spent and amount remaining)
Spent: $454.87
Remaining: $2545.13
Progress on Report and Webpage
Completed Week 3 portion of the report report
Started the outline of the final report
Laying ground work for splash page and presentation video