ENGR1025 - Tutorial 3

Auxiliary Views Overview

  • Definition: Auxiliary views are true projections of slanted or angled faces, showing accurate dimensions of those features.
  • Characteristics:
    • Slanted faces appear in more than one view.
    • The shape of slanted faces is always distorted in standard views.
  • Purpose:
    • They provide a way to visualize inclined surfaces and accurately dimension important features, such as holes.
    • Common example: a "half auxiliary" view is often used to simplify complex representations.

Techniques for Creating Auxiliary Views

  1. Depth Auxiliary View Technique
  2. Height Auxiliary View Technique (projected from the top view)
  3. Width Auxiliary View Technique (projected from the profile view)
Depth Auxiliary View Technique
  • Steps:
    1. Identify the true size of slanted faces.
    2. Draw an auxiliary plane parallel to the inclined face.
    3. Project lines from the top view and profile view to form the true outline of the face.
    4. Dimension the auxiliary view correctly for clarity.
Height Auxiliary View Technique
  • Steps:
    1. Determine the line of sight (LOS) for viewing the inclined surfaces.
    2. Draw auxiliary planes parallel to the feature viewed from top or profile.
    3. Project necessary dimensions from the adjacent views.
    4. Ensure that the auxiliary view accurately reflects height dimensions.
Width Auxiliary View Technique
  • Steps:
    1. Establish the line of sight to capture width features.
    2. Create an auxiliary plane perpendicular to the view, capturing the correct dimensions.
    3. Use projections from both top and side views for accuracy.

Types of Auxiliary Views

  1. Full Auxiliary View:
    • Displays the inclined face and all other features.
    • Rarely used due to complexity and potential for clutter.
  2. Partial Auxiliary View:
    • Illustrates only the inclined face.
    • More practical for complex shapes where clarity is needed.
  3. Half Auxiliary View:
    • Presents only half of the inclined face.
    • Useful for symmetrical shapes, simplifying representation.

Examples of Auxiliary Views

  • Example 1: Create a partial auxiliary view based on provided dimensions and outlines. Focus on capturing the true projections of inclined faces.
  • Example 2: Demonstrate both partial and full auxiliary views, comparing the detailed orientation of face features.

Design Project - Manual Juicing Machine

  • Design Requirements:

    • Manual operation as well as powered by handheld electric drill.
    • Focus on swift assembly, disassembly, and cleaning.
    • Ensure a compact, cost-effective, and user-friendly design.
    • Design for usability, minimizing effort required by various user demographics.

  • Marking Criteria:

    • Depend on effective collaboration, design creativity, and clarity.
    • Individual grading based on contribution to team projects.

Homework Assignments

  • Practice drawing isometric and auxiliary views based on given objects to enhance understanding of projections and views in engineering designs.

Conclusion

  • Mastery of auxiliary views is essential in engineering design for accurate representation and dimensioning of complex shapes. Understanding these techniques will aid in effectively communicating design solutions.