CAD 2 was all about utilizing and expanding upon the information and skills we had acquired from CAD 1. We began with a refresher of some of the techniques and standards we had learned previously through some intro mechanical drawings before moving back into AutoCAD. We did orthographic, isometric, and three dimensional drawings using AutoCAD. My class was also able to experiment with architectural floor plans to end out our year.
Hand Drawing
We began with a refresher of some of the techniques and standards we had learned previously through some intro mechanical drawings as shown below. The hardest part to become accustomed to once again was the tedious specificity with using each drawing instrument and the attention to detail with dimensions.
Following our intro drawings, we moved into larger more complex CAD drawings using a new template on D-sized paper. The first of our drawings was an orthographic projection of a drive holder with an isometric drawing to help visualize the object.
Our final paper and pencil drawing was a toolmaker's clamp. This drawing was done in isometric and supplemented with a parts list which labeled the different pieces of the clamp. This drawing also utilized our new template and D-sized paper.
AutoCAD
Following our work in hand drawing, we moved into AutoCAD. We did a total of 8 basic mechanical drawings in AutoCAD and used both single sided views and orthographic projections of each part or piece
Manufacturing Presentation
We finished our 8 drawings in AutoCAD and had a slight break to learn about different manufacturing processes. Each student in our class was responsible for researching and presenting to the class a different manufacturing technique or material. I was in charge of plastic blow molding. The following images are slides of the presentation I presented to the class.
AutoCAD 3-D
After our brief manufacturing processes unit, we moved into AutoCAD 3-D. We used the same program and worked in a three dimensional space where we were able to manipulate and extrude our objects in the X-Y-Z matrix instead of working in the normal X-Y plane. Once we had out completed object, we were able to change the part to become see through using the X-Ray view or use a view such as shaded with edges to see a simulation of what the 3-D object would look like in real perspective. Below are some examples of what I was able to create.
For part of our AutoCAD 3-D unit, each student was required to choose a unique part from our textbook and successfully draw and then produce the part using a 3-D printer. In order to print from AutoCAD, I had to export my file to a program called FlashPrint which contains the software to slice the object, determine the temperature, and add supports to the object I wanted to print. The printer I used was a Flashforge Creator Pro. Below is the part that I chose, a RH Pipe Bracket which I printed using red PLA plastic.
Architecture
The final unit of CAD II was a small unit on architecture where every student was required to create a floor plan that fit a specific list of requirements. The requirements included, 2 entrances/exits, living room, kitchen with appliances, 2 full bathrooms, 2 bedrooms, 1 closet, and one mechanical area, among other more specific requirements. My floor plan is and the complete list of standards are shown below.
Conclusion
Perhaps my favorite part of CAD 2 was working with AutoCAD 3-D. It was a different way to use the program that I had not previously used. I thoroughly enjoyed using the 3-D printers and being able to help my peers as well. I spent a large portion of the class helping my classmates with their own projects and drawings. The satisfaction I received from watching them succeed or the excitement on their faces when I was able to show them a new way to do something they had not previously thought of was a large driving factor for me. That alone made my sacrifice of time worth every minute. Even though this was the second time this class was run, my teacher was deeply committed to our success and I appreciate everything he did to show us new skills and to help us succeed. Whether it was on the computer, in the classroom, or out in the real world, he prepared us to become the best person we were meant to be, and to become a competitive employee and citizen in an ever changing world. For that and so much more I am forever grateful. Thank your Mr. Zeroth.