Cam-Mechanism Design

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Cam-Mechanism Design

Cam and Mechanism Design with MechDesigner

Packaging Machine with Cams. Courtesy of Lareka NL

Example of cams in a protected enclosure with forced oil feed, typical of a packaging machine.

Even though there have been many advances in servo control in recent decades, cams are still important machine elements. There are many cam designs that servomotors cannot replace. Cam mechanisms are often preferred by designers on account of their apparent simplicity. Experienced design engineers know, however, that cam mechanisms are not always as simple as they seem. Considerable theoretical understanding is needed in order to get the best from a cam mechanism and avoid its premature failure. The performance of machines that appear to be identical can in fact be very different, and are entirely dependent on the quality of the cam system and motions. Those manufacturers who have the better knowledge will have machines that operate at higher speed and with greater reliability, lower maintenance costs, but at the same capital cost.

This section helps you understand how your design decisions can make a large difference to the cam-system's overall performance.

GST-Icon-Add2DCam Cam Mechanisms

The Cam Mechanical System

Cam and Follower General Classifications

Force-Closed / Form-Closed Cams

Follower-Roller: Design-Arrangements

Follower-Roller: Design Specifications

Dynamics of Cam Mechanical Systems

Motion-Law Coefficients

Cam Analysis and Design Checklist

Configure the Power Source

Geometric Analysis: Cam-Size

Geometric-Analysis : Pressure-Angle / Overturning Moment

Geometric-Analysis: Radius-of-Curvature

Force and Stress Analysis

Configure the Model for Payload Analysis

Contact-Force

Maximum Shear Stress

Wear and Rolling Contact Fatigue.

Materials for Cam Manufacture