<< Click to Display Table of Contents >> Navigation: Getting Started Tutorials - MechDesigner > Tutorial 6: Cams: Flat, Barrel, Globoidal, 'Slot' |
•To learn how to model different cam types. •To improve your modeling skills. Please do tutorials 1,2,3, and 5 before Tutorial 6. |
In machines, Cams impart motions to Followers. The Cam usually has a simple motion, and the Follower has a more complex motion. It is possible that the Cam or the Follower is stationary. Also, the Cam and the Follower may both have complex motions. |
Example of cams in a protected enclosure with forced oil feed, typical of a packaging machine.
2D-Cams and 3D-Cams
Terms : |
Definitions |
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Cam : |
The Part that supports the Cam-Profile shape. Its motion is the input to the Cam system. |
Cam-Shaft : |
A rotating-Part, the shaft part, to which you the 2D-Cam (or 3D-Cam) and the Cam-Profile. A cam-shaft usually rotates with a constant angular-velocity. |
Cam-Profile : |
The surface of a 2D-Cam (or 3D-Cam) that is in continuous contact with the Follower-Profile. |
Cam-Track : |
A groove that is cut into a Cam-Blank with an Outer and an Inner Cam-Profile. |
Follower : |
The Part that supports the Follower-Profile. Its motion is the output from the cam system. |
Follower-Profile : |
The surface that interacts with the Cam-Profile. |
Follower-Roller : |
A Follower with a Follower-Profile that is cylindrical or barrel-shaped. |
Flat-faced Follower : |
A Follower with a Follower-Profile that is a flat surface. |
Translating Follower : |
A Follower that moves along a straight axis. |
Reciprocating : |
A sliding-Part that has a non-progressive motion. |
Rotating Follower : |
A Follower that rotates about a fixed axis with a progressive or non-progressive motion. |
Oscillating : |
A rotating-Part that has a non-progressive motion. |
Progressive Motion : |
A motion that moves the Follower generally in one direction. |
Non-Progressive Motion : |
A motion that returns the Follower to its original position after each machine cycle. |
Indexing : |
A progressive, usually rotating motion. |
Indexer : |
A device whose input is a constant-speed Cam-Shaft and output is a rotating shaft with a progressive motion. After the cam-shaft rotates fully a number of times, the output shaft rotates by 360º. |
Cam-Blank : |
The material that you need before you cut the shape of the Cam-Profile. |