All these are Machine Drawing Concepts with Real Values. I have attached the drawing sheets for all these designs so that it can be put to use in a right manner. The printouts are scaled version (0.5 to 0.75) of the original drawings. It is just to help students visualize the model by touching and feeling them.
Not all the models need support structures. Certain models can be printed without support structures. But for certain ones, you would need support structures.
Overview and Background
Machine drawing deals with the information regarding a part or component of a machinery and it also has information about the way it should be made. A machine drawing generally gives all the external and internal details of the machine component from which it can be manufactured. The machining symbols, tolerances, bill of material, etc. are specified on the drawing.
Lesson Plan and Activity
Take a printout of the drawing sheets on paper
Ask the student to use a modeling software (any licensed version of AutoCAD, Fusion 360, Spaceclaim, Rhino, etc. can be used) and start with the line sketch
The dimensions for the line sketch are all given in the drawing sheets
Using the line sketch, ask the student to extrude the surfaces created in three dimensional bodies
Using various tools like pull, move, fill, combine, split, chamfer, rounds, tapers, shell, offset curves, etc. produce the shapes of the machine components in each object
Create a drawing sheet for every machine component and lay down the dimensions
Save the file in various formats suitable for CNC and 3D Printing machines
Load the .STL saved file in MakerBot Print
Use the printer parameters specified and print the file
Materials Needed Include
- Laptop or Desktop PC with configuration related to the Modeling Software
- Licensed or Education Licensed Modeling Software's
- 3D Printer
- Software for Slicing
1 Hour Lesson per Machine Drawing