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DESIGN STATEMENT: Design and build a wooden toy car to donate to Toys for Tots. This will be done with a computer - aided design program (Onshape) and a CNC Router.
DESIGN STATEMENT: Design and build a wooden toy car to donate to Toys for Tots. This will be done with a computer - aided design program (Onshape) and a CNC Router.
CRITERIA:
CRITERIA:
Car should be sanded.
Car should be painted/stained.
Car should contain at least on window.
Wheels should be free rolling.
Side profile of car should be no bigger than 4x6 inches.
Use 1.5 inch wheels.
Axles should be 1/4 inch in diameter.
CONSTRAINTS:
CONSTRAINTS:
Lumber
Screws
Stains and paints
CNC Router
Onshape
3 weeks in class
Technical Drawing, CAD Model, and
Technical Drawing, CAD Model, and
Final Prototype:
Final Prototype:
Design Process:
Design Process:
After sketching out my design, I created a 3D model of my car using Onshape. While transferring one of the CAD faces to V-Carve so I could cut it using the CNC Router, I realized that the wheel holes would go all the way through the car. To solve this, I decided to cut my car in three pieces, one piece with the windows and wheel holes, a middle piece with just the car outline, and a mirrored piece of the first. It took 3 cuts to successfully cut these out plus wheels. I had to design my own wheels to fit in m car. After sanding, I glued my car together then painted it. I was unsure of how to create the right size axles for my car in such a limited amount of time, so I used screws instead of wood.
Results:
Results:
My car was aesthetically pleasing. The design was very realistic compared to most of the other cars. The metal screw axles greatly contributed to the real car look. The choice in red paint made my car pop and not boring. A few of the cars's details looked slightly rough. Three of the wheels work great, but one is too close to the car edge and hits it, causing the wheel to not turn. My car can only about a foot.
Improvements:
Improvements:
I should not have took so long developing my CAD model. This caused me to be very rushed during it's construction. I would instead leave time to:
A neater paint job: some of my quick painting resulted in small dots of unpainted wood or areas where you two colors mixed together.
More complex paint job: I could add in details like headlights and a windshield.
I would have sanded the 4th wheel down so my car rolled well.
I should made sure the wheels rolled well before a drilled the holes into the car.
I should have sanded my car more so it had a more polished look.
SKILLS LEARNED: During this project, I gained experience using computer-aided design soft wares, in particular Onshape. During the process of creating my CAD model, I learned many things including how to make a sketch using the sketching tools. I then used the extrude feature to make it 3D and remove the window indentions. I also used V-Carve, CNC Router, jigsaw, electric sander, and a drill press.
SKILLS LEARNED: During this project, I gained experience using computer-aided design soft wares, in particular Onshape. During the process of creating my CAD model, I learned many things including how to make a sketch using the sketching tools. I then used the extrude feature to make it 3D and remove the window indentions. I also used V-Carve, CNC Router, jigsaw, electric sander, and a drill press.
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