COURSE DES1050: CAD 1
Description: Students develop basic knowledge and skills in computer-aided design (CAD).
For this course, we will continue to develop our skills in Autodesk Inventor, with a focus on creating 2D drawings.
Using Autodesk Inventor, Complete the following assignments:
Dimensioning Presentation: Dimension Guidelines
- Dimensions should NOT be duplicated, or the same information given in two different ways.
- No unnecessary dimensions should be used – only those needed to produce or inspect the part.
- Dimensions should be attached to the view that best shows the contour of the feature to be dimensioned.
- Whenever possible, avoid dimensioning to hidden lines and features.
- Avoid dimensioning over or through the object.
- A dimension should be attached to only one view; for example, extension lines should not connect two views.
- Whenever possible, locate dimensions between adjacent views.
- Avoid crossing extension lines, but do not break them when they do cross.
- Whenever possible, avoid sending extension lines through object views.
- In general, a circle is dimensioned by its diameter and an arc by its radius.
- Holes are located by their centerlines, which may be extended and used as extension lines.
- Holes should be located and sized in the view that shows the feature as a circle.
- Do not cross a dimension line with an extension line, and avoid crossing dimensions with leader lines.
- Leader lines point toward the center of the feature, and should not occur horizontally or vertically.
- Dimension numbers should be centered between arrowheads, except when using stacked dimensions, and then the numbers should be staggered.
- Concentric circles are dimensioned in the longitudinal view, whenever practical.
The requirements for the Final Project are as follows:
- Choose an object to model in Inventor. You will be given one week of class time (5 hours minimum) to complete the model.
- Object chosen must not be too simple. It must demonstrate your knowledge and skills in inventor. Here are some of the functions we have used in Inventor:
- Creating Sketches
- Extruding to 3D
- Drilling holes (countersinking, threaded, etc.)
- Using constraints.
- Drawing lines, arcs, circles, splines, etc.
- Selecting Materials
- Provide at least one photograph of the object you are going to model. Print it in colour (Room203-C Printer) and attach it to this sheet.
- 50-70% Design and create a model that will 3D print successfully.
- 70-80% Design and create a model that uses 2 parts that fit together precisely and that will 3D print successfully.
- 80-90% Design and create a model that uses more than 2 parts that fit together precisely and that will 3D print successfully.
- 90-100% Design and create a model that incorporates a hinge (3 parts minimum) that fits together precisely and that will 3D print successfully.
3D Printing Reminders
- Be aware of overhangs and bridges. Minimize them.
- The printer’s nozzle is 0.4mm, you cannot physically print any details smaller than that.
- Make all holes and features no smaller than 2mm.
- Wall thickness should be 2mm minimum.
- Parts that will fit together must have tolerance (looseness) designed in.
- Be aware of print time. No 10 hour prints.
- Be aware of build volume (size). Keep all parts to within a 150mm max dimension.
- Be aware of build height. See above.
- Be aware of what causes warping. Choose print orientations to avoid warping.
The rest of the instructions are on the CAD1-Final assignment sheet.