Forging new generations of engineers Oblique Pictorials Introduction to Engineering DesignTM Unit 1 – Lesson 1.2 – Intro to Technical Sketching Forging new generations of engineers Project Lead The Way, Inc. Copyright 2007

Oblique Pictorials

Oblique Pictorials An Oblique pictorial starts with a straight-on view of one of the object’s faces, which is often the front face. Angled, parallel lines are drawn to one side to represent the object’s depth. Common oblique angles include 30°, 45°, and 60°. 45°

Types of Oblique Drawings Oblique Pictorials Introduction to Engineering DesignTM Unit 1 – Lesson 1.2 – Intro to Technical Sketching Types of Oblique Drawings There are two types of oblique pictorials: cavalier and cabinet. The difference between the two is based on how the depth of the object is represented. This slide is for informational purposes so the student is aware that there are different types. Oblique Cavalier Oblique Cabinet Project Lead The Way, Inc. Copyright 2007

Types of Oblique Drawings Oblique Pictorials Introduction to Engineering DesignTM Unit 1 – Lesson 1.2 – Intro to Technical Sketching Types of Oblique Drawings Oblique Cavalier Oblique Cabinet The difference in the two is the depth of the object. Project Lead The Way, Inc. Copyright 2007

Oblique Pictorials Introduction to Engineering DesignTM Unit 1 – Lesson 1.2 – Intro to Technical Sketching General Oblique A general oblique is a type of oblique pictorial that represents an object’s width and height, but the depth can be any size and drawn at any angle. The idea is to worry about getting the thought down as a sketch not worrying about the depth or angle. This is the oblique the students will be drawing. This will allow students to draw the sketch or thought they have and not worry about getting the angle or depth exact. Project Lead The Way, Inc. Copyright 2007

The Box Method The box method is a sketching technique that is used to maintain proportionality. It starts with the sketcher envisioning an object contained within an imaginary box.

Oblique Sketches Step #1: Layout the box within which the oblique view will occur using points and construction lines.

Oblique Sketches Step #2: Use points and construction lines to identify edges that occur on the surface of the box.

Oblique Sketches Step #3: Trace out the visible edges of the part with thick, dark object lines.

Oblique Sketches Step #4: Use points and construction lines to identify edges that occur on the surface of the box.

Oblique Sketches Step #5: Trace out the visible edges of the part with thick, dark object lines.

Oblique Pictorials Introduction to Engineering DesignTM Unit 1 – Lesson 1.2 – Intro to Technical Sketching Tonal Shading Add tonal shading to two of the three views by drawing parallel lines spaced closely together. Increase the contrast by cross-hatching the lines on the darkest face. Tonal shading is a nice feature to use to enhance your sketch. Project Lead The Way, Inc. Copyright 2007