MEC106 Project Assignment (Final) 2024-2025 Semester One

Orthographic Drawing (Multiview Drawing) for Engineering Solids & Isometric Sketching from Orthographic Views

Assessment Weighting

This assessment counts for 100% of the final mark of the module.

Aims

This project firstly  aims to provide  students the knowledge and  skill  set for orthographic drawing (multiview drawing). If the object is correctly positioned relative to the projection planes, the dimensions of features will be represented in true size in one or more of the views. Multiview drawing provide the most accurate description of 3D objects and structures for engineering, manufacturing and construction requirements. Last but not least, this project aims to provide students the knowledge and skill set for isometric sketch. An isometric sketch is a type of parallel projection that represents all 3D in a single image. Though there are a number of ways  of orienting  an  object  to  represent  all  3D,  isometric  pictorials  have  a  standard orientation that make them particularly easy to sketch.

Learning Outcomes

On completion of this assignment you should be able to:

1. demonstrate a clear understanding of the standards in engineering drawing;

2. apply orthographic projection to view and analyze engineering solids;

3. propose the isometric representation of engineering components;

4. apply spatial-visual thought, spatial imagination, exploration and innovation;

5. master the knowledge of Computer Aided Design applications;

6. produce an engineering style. report.

Design Instruction

The risk to lose full or partial points or marks would be effective, if students do not follow the instructions and the given grading information.

In multiview drawing, generally three views of an object are drawn (front view, right side view and top view). The views are defined according to the positions of the planes of projection with respect to the object. A multiview drawing example is given as follow in Figure 1:

Figure 1

An axonometric projection in which three of the axes are measured on the same scale and are at the same angle relative to each other. The projected lengths are approximately 80 percent of the true lengths. If the drawing is produced using full scale, it is called an isometric drawing. An isometric sketch example from multiview is given as follow in Figure 2:

Figure 2

Section A (30%):

Figure 3 shows components in Orthographic view. Use hand drawing to present the engineering drawing of the 3 components, including isometric sketch and multiviews.

Section B (50%):

Two engineering parts are given in Figure 4 - 5. Please provide the engineering drawing of the objects  using  Creo,  so  that  they  contain  sufficient  information  for  the  fabrication,  i.e., containing all views necessary for manufacture (all the holes are through holes).

Figure 4

Figure 5

Section C (20%):

1.    Figure  6  shows  a  photo  of  a  guitar.  Design  a  guitar  holder  (by  Creo).  Prepare  an engineering drawing for the manufacture of this part (orthographic projection). Provide also an elaboration/explanation of your design in your report.

Figure 6

Grading Information:

Please scan, or photo your completed design and put/integrate them with the report in one pdf file (clearly presented).

1.   Section A (30%)

1)   Design Layout (5%):

Please draw the front view, top view and right-side view on the left part of the A4 size drawing paper with grid. Please design the isometric sketch on the right part of the paper. Please make full use of the A4 size drawing paper with proper scale.

2)   Design in Multiview Drawing and Isometric Sketch (20%):

Multiview Drawing: the expected drawings shall match each line to the given generic geometry objects ’ feature in the multiview drawing (front view, right side view and top view). Each multiview name (front view, right side view and top view) shall be listed under each drawing. Isometric Sketch: the final isometric sketch shall match each line from the given object feature in the given multiview drawing.

3)   Report (5 %):

Please list the benefit of isometric sketch and give comparison of isometric sketch and oblique sketch in this part.

2.   Section B (50%)

1)    3D modeling of the objects (15%)

Please create the 3D model of the objects using Creo. Provide the screenshot of 3D model of various angles (up to 5) in your report.

2)    Designs in Multiview Drawing (28%):

Multiview Drawing: the expected drawings shall match each line to the given generic geometry objects ’ feature in the multiview drawing (front view, right side view and top view).

3)    Report (7%)

Please present the benefit of multiview drawing, as well as a briefing comparison of multiview drawing, pictorial drawing and perspective drawing in the part. Please also discuss about the Computer Aided Design (CAD) application/software in the part.

3.   Section C (20%)

1)    3D modeling of the objects (8%)

Please create the 3D model of the object using Creo. Provide the screenshot of 3D model of various angles (at least 5) in your report.

2)    Designs in Multiview Drawing (10%):

Provide the multiview drawing of you design contains sufficient information (dimension).

3)    Give the explanation of your design (2%).