Timed CAD Drills
Terms you will need
- orthographic projectionA way to show a 3D object in 2D by drawing it from different flat sides, like front, top, and side views, so you can see all the details clearly.
- third-angle projectionA method of drawing an object where the views are shown as if the object is inside a box and each side of the box is opened to show the view from that side, used mainly in the US and Canada.
- section viewA drawing that shows the inside of an object by imagining it is cut open, so you can see the hidden parts clearly.
- hidden lineA dashed line in a drawing that shows parts of an object that are not visible from the current view but are still important to understand the shape.
- dimensioningAdding numbers and lines to a drawing to show the exact size and shape of each part of an object.
- title blockA section on a drawing that includes important information like the drawing title, who made it, the date, and the units used.
How this topic runs
Timed CAD Drills are exercises that help students improve their speed and accuracy in using computer-aided design (CAD) software. The goal is to become faster at drawing while still keeping the work precise and correct. To do well in timed CAD drills, students need to know key terms like 'orthographic projection,' 'isometric view,' and 'dimensioning.' These terms describe how objects are shown in drawings and how measurements are added.
Students should also remember that CAD is used to make clear, detailed drawings for manufacturing. This means every line, label, and measurement must follow standard rules. With practice, they can create professional-quality drawings in less time.
Key Points
- Orthographic projection is a means of representing three-dimensional objects in two dimensions by projecting lines that are orthogonal to the projection plane.
- Third-angle projection is a type of orthographic projection where the parallel projectors originate as if radiated from the far side of the object and pass through the 3D object to project a 2D image onto the orthogonal plane in front of it.
- A section view is a projected view that shows a cross section of the source object along a specified cut plane, often used to show internal features with more clarity.
- A hidden line is a short-dashed line used in engineering drawings to represent edges that are not directly visible.
Terms
Tap a term for a plain-language explanation.
Sources & licensing(4)
- OpenStax — openstax.org/books/college-physics-2e/pages/1-2-physical-quantities-and-units (Creative Commons Attribution 4.0)
- Wikipedia contributors — en.wikipedia.org/wiki/Orthographic_projection (Creative Commons Attribution-ShareAlike 4.0)
- Wikipedia contributors — en.wikipedia.org/wiki/Engineering_drawing (Creative Commons Attribution-ShareAlike 4.0)
- Wikipedia contributors — en.wikipedia.org/wiki/Curly_birch (Creative Commons Attribution-ShareAlike 4.0)