activity 5.5A
description
In order to use CAD effectively as a design tool, the designer must have the skills necessary to create, edit, and manipulate a 3D model of a part in order to create a realistic representation of an imagined object. In this activity you will build on the CAD skills that you learned in Activity 5.2b Introduction to CAD Skills. You will learn about and use additional tools and features available in most CAD programs and apply your new CAD skills to the creation of more complex parts that will be used in later activities (as components in the assembly of parts) to create complete products (including a complete Automoblox vehicle and a Button Maker machine).
As you work through the exercises in this activity, pay particular attention to the environment in which you are working. Several CAD tools can be used as sketch tools or features tools, and it is important to understand the difference. For instance, sketch components (such as points or shapes) can be patterned within a sketch. But pattern tools are also available outside of the sketch environment to create patterns of features (such as holes or protrusions).
As you work through the exercises in this activity, pay particular attention to the environment in which you are working. Several CAD tools can be used as sketch tools or features tools, and it is important to understand the difference. For instance, sketch components (such as points or shapes) can be patterned within a sketch. But pattern tools are also available outside of the sketch environment to create patterns of features (such as holes or protrusions).
conclusion
What 3D CAD functions could be used to create a wire coat hanger?
Sweep, workplane, line, circle, Project reality
For each of the following, sketch a 2D shape and an axis of rotation that you could use to model each of the following solid forms using the Revolve function within 3D modeling software. Dimension each sketch and indicate the axis of rotation that you would use. You may use software to check your answers.
1) A solid cylinder with a diameter of 3.5 in. and a height of 7 in. Be sure to dimension the shape.
2) A solid sphere using the Revolve function. What rotation angle would you use?
180 degrees
Sweep, workplane, line, circle, Project reality
For each of the following, sketch a 2D shape and an axis of rotation that you could use to model each of the following solid forms using the Revolve function within 3D modeling software. Dimension each sketch and indicate the axis of rotation that you would use. You may use software to check your answers.
1) A solid cylinder with a diameter of 3.5 in. and a height of 7 in. Be sure to dimension the shape.
2) A solid sphere using the Revolve function. What rotation angle would you use?
180 degrees
Conclusion question 2, part 1