2009
Table Of Contents
- Contents
- Overview
- 1 About AutoCAD Mechanical
- AutoCAD Mechanical Software Package
- Leveraging Legacy Data
- Starting AutoCAD Mechanical
- AutoCAD Mechanical Help
- Product Support and Training Resources
- Design Features in AutoCAD Mechanical
- Mechanical Structure
- Associative Design and Detailing
- External References for Mechanical Structure
- Associative 2D Hide
- Autodesk Inventor link
- 2D Design Productivity
- Engineering Calculations
- Machinery Systems Generators
- Intelligent Production Drawing and Detailing
- Detailing Productivity
- Annotations
- Standard Mechanical Content
- Standard Parts Tools
- Collaboration
- 2 Commands in AutoCAD Mechanical
- 1 About AutoCAD Mechanical
- Design and Annotation Tools
- 3 Working with Templates
- 4 Using Mechanical Structure
- 5 Designing Levers
- 6 Working with Model Space and Layouts
- 7 Dimensioning
- 8 Working with 2D Hide and 2D Steel Shapes
- 9 Working with Standard Parts
- Key Terms
- Working with Standard Parts
- Inserting Screw Connections
- Copying Screw Connections with Power Copy
- Creating Screw Templates
- Editing Screw Connections with Power Edit
- Working with Power View
- Deleting with Power Erase
- Inserting Holes
- Inserting Pins
- Turning Off Centerlines in Configurations
- Hiding Construction Lines
- Simplifying Representations of Standard Parts
- 10 Working with BOMs and Parts Lists
- 11 Creating Shafts with Standard Parts
- Key Terms
- Creating Shafts
- Configuring Snap Options
- Configuring Shaft Generators
- Creating Cylindrical Shaft Sections and Gears
- Inserting Spline Profiles
- Inserting Chamfers and Fillets
- Inserting Shaft Breaks
- Creating Side Views of Shafts
- Inserting Threads on Shafts
- Editing Shafts and Inserting Sections
- Replacing Shaft Sections
- Inserting Bearings
- Engineering Calculations
- Autodesk Inventor Link
- Index
DefinitionTerm
Controls the precision of curves. A low value increases computing
time. Use a higher value for initial design.
resolution
Graph of the speed of the straight driven element, or the rotation
angle of a rocker and the cam plate angle of rotation.
step width
Designing and Calculating Cams
With the cam design and calculation functionality in AutoCAD Mechanical,
you can implement all motions required in the scope of process control with
a minimum number of gear elements. The basis for systematic design
procedures is offered using standardized laws of movement in the development
of new cam gears.
With the automated cam features, you can create cams (linear, circular, and
cylindrical cams) based on sections drawn in a motion diagram. You can also
calculate velocity and acceleration of an existing section of the motion
diagram. The cam curve path can be determined with the calculated cam
sections. An existing curve path can be scanned and transferred in the motion
diagram. A driven element can be coupled to the cam. NC data can be created
using the curve path.
In the following exercise, you generate a circular cam and a swinging follower
with a single roller. You also calculate the spring of the follower. The cam and
the follower are inserted into the drawing together with the motion diagrams.
At the end you generate the NC data for the cam production.
Start with an ISO drawing template.
To open a template
1 On the command line, enter NEW.
2 The Select template dialog box opens. Select the template am_iso.dwt and
click Open. This creates a new drawing based on the am_iso template.
Use Save As to save the drawing file with an appropriate name.
342 | Chapter 18 Designing and Calculating Cams