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Mar

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Disk-o-Poli Saw: Bringing the 1813 Disk Saw Into the 21st Century Mar a del Mar Aguirre Font Efra n Hern ndez Rivera Leslie M. Mercado Santiago – PowerPoint PPT presentation

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Title: Mar


1
Disk-o-Poli Saw Bringing the 1813 Disk Saw Into
the 21st Century
María del Mar Aguirre Font Efraín Hernández
Rivera Leslie M. Mercado Santiago Elba M.
Sánchez Santiago Computer Aided Engineering
Design Course Dr. Vijay K. Goyal December 1st,
2007
2
Agenda
  • Background
  • Literature Survey
  • Problem Description
  • Project Flow
  • Analysis
  • Final Design
  • Recommendations
  • Conclusions

3
Background
  • Disk Saws
  • One of the most useful home improvement tools.
  • Invented in 1813 by Tabitah Babhit.
  • Project Focus
  • Bringing to the consumer the opportunity to have
    a
  • multifunctional disk saw.

Fig.1 Example of wood works
Fig.2 Wood Closet
4
Literature Survey
  • Existing Disk Saws and Sanding Machines
  • PROS
  • Versatile applications including cabinets, doors
    and many
  • other wood projects.
  • It can be adjusted for depth of cut, which
    minimizes kickback.
  • It can be adjusted to tilt up to 50 degrees in
    relation to the blade.
  • CONS
  • It is not possible to cut the wood at angles
    bigger
  • than 50 degrees.
  • Many workers have to make a big effort when
  • carrying out these tools to the work place.
  • -- Workers can not finish the entire work
    quickly.

Fig.3 Ergonomic problem when using disk saws
5
Problem Description
  • To modify the existent disk saws, providing a
    second application.
  • The second application selected was a sanding
    attachment.
  • This was achieved through the Design Analysis
    of a disk saw and a sanding machine components
    individually and uniting them will allow to the
    consumers
  • Fast switching to the sanding attachment.
  • Reduce- of steps time due to the
    multifunction.
  • Reduce human effort required.

6
Project Flow
Need
Generate Ideas
Final Design
3
Analysis
Final Remarks and Recommendations
Conclusions
7
Optimization Analysis
  • Method Lagrange's Optimization Method
  • Focus To optimize the total volume of the shaft
    and gear.
  • Analysis of stresses to which the shafts are
    submitted to.

Fig. 4 Shaft to be optimized
8
Optimization Analysis (Ctd.)
Design Variables
Fig.5 Sketch showing design variables
9
Optimization Analysis (Ctd.)
Objective Function
10
Optimization Analysis (Ctd.)
Constraints
Equality
Inequality
11
Optimization Analysis (Ctd.)
Results
  • The dimension obtained from the optimization
    analysis comply with K-T conditions
  • Analysis gives us the following results

f(x)1.77in3
12
Structural Analysis
ANSYS
Fig.7 Applied Forces (in red)
Fig.6 Meshed Product
13
Structural Analysis (Ctd.)
Stress and Strain Plots
14
Structural Analysis (Ctd.)
Deformation Plot
Fig.8 Ansys plot showing deformation
15
Cost Analysis
Miscellaneous screws, bolts, nuts, etc.
16
Final Design
After perform all the analyses the resulting
design of the Disk-o-Poli Saw optimized part
looks as shown
Fig.9 Optimized part
17
Recommendations
  • Develop a more detailed analysis of
  • Materials
  • Stresses
  • Thermal implications
  • To make an ergonomic analysis of the handle.
  • To design a universal adapter.
  • Design the machine in such a way that it can be
    used to cut not only wood, but plastic and
    concrete.

18
Conclusions
  • The Disk-o-Poli Saw will facilitate projects due
    to
  • Minimize workers effort during their projects
  • Guarantee workers less time of work
  • Multifunction will lead to complete the wood work
  • Feasible in terms of cost

19
Acknowledgements
  • God
  • Professor Vijay K. Goyal
  • Professor Ricky Valentín

20
  • Questions

21
  • Thank You!

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