Overview of Status of Analysis, Design, Fabrication, Tests, etc.
New reduction on whether a water jet could remove flash was performed.
Settled on a preliminary design concept
Received pin CAD from sponsor
Accomplishments from Previous Week
New risk reduction test was performed
Question: Can a water jet remove the flash?
The stream of 100 psi water was unable to visibly alter the flash.
It may be that the flash is flimsy and will be pushed into the dimple by the jet of water. As a result, the jet is unable to remove the flash
Sharpie was placed on the ball to see if any material would be removed with the water jet of 100 psi
No visible alteration of the spots marked with the sharpie
Clarified goals with sponsor:
Wants a system can be manual or automatic that removes the all the flash off of a ball in a reasonable amount of time, i.e. 12 minutes per ball
The surface does not have to be perfectly smooth may be a little rough
Settled on a preliminary design concept
CNC mill be will used to move the dremel head
Custom dremel bit will be made following the contour of the head of the pins in the CAD
The tilting stage is not ideal due to the difficulty of finding a precise and inexpensive stage that suits the needs of the system
The system will be designed using gear trains in order to create a dremel bit that comes in from an angle to attack the hexagon dimples surrounding the pentagon dimple
The ball will be stationary
Goals for Next Week (list names after each item). Use specific and measurable objectives.
3D print the pins from the CAD file and determine if they fit the dimples (Marshall)
Custom design the dremel bit heads from the heads of the pin (Marshall)
Find a custom bit manufacturer that will make the bits using different levels of hardness (Aaron)
Order a CNC machine (Marshall)
Design in SolidWorks a gear train system that will allow for the dremel bits to be angled and attack the hexagon dimples (Jacen, Rohan, Aaron)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Clarified goals with sponsor: (in person 4/4/19)
Wants a system can be manual or automatic that removes the all the flash off of a ball in a reasonable amount of time, i.e. 12 minutes per ball
The surface does not have to be perfectly smooth may be a little rough
Sponsor sent us the CAD files of the pins used for the injection molding (email 4/3/19)
Sponsor required patent documents to be signed and returned (email 3/27/19)
These documents were signed and returned
Sponsor indicated approval of current preliminary design idea (in person 4/4/19)
Sponsor indicated that freezing the flash may be a viable option (in person 4/4/19)
Sponsor discussed idea of using hot gas and etching to remove the flash and presented issues regarding these options (in person 4/4/19)
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Instructor indicated approval of the preliminary design idea that was presented (in person 4/2/19)
Instructor suggested using etching as a way to remove the flash (in person 4/2/19)
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
Will the gear train of the preliminary design idea be viable?
Will the custom bits produced from the pins fit flush with the dimple?
Will the lead time on these custom bits be reasonable?
Resources or Information Required but not Available
Water Jet that can produce a stream greater than 100 psi
An understanding of the etching process in regards to polyurethane
A FOM account with the nano3 lab in order to use the machines.
Schedule
Describe upcoming milestone
Update Gantt chart.
Budget (list amount spent and amount remaining)
Spent: $12
Remaining: $9,988
Progress on Report and Webpage
Report not begun
Internal Webpage begun