Kammprofile

Kammprofile, or cam profile, is the outline of a cam surface that governs the motion of a follower in a cam mechanism. In engineering texts, the term cam profile describes the 2D curve traced by the cam surface as the cam rotates, prescribing the follower's displacement as a function of the cam angle. The design balances requirements for precise timing, smooth acceleration, and manufacturability.

For a radial cam, the follower translates as the cam rotates; for a cylindrical cam, the motion is along the axis. The profile is typically specified by a displacement function x(θ), from which the cam surface coordinates are derived. Designers ensure that velocity, acceleration, and sometimes jerk remain within limits to minimize shock, wear, and noise. The profile also must accommodate follower geometry, clearance, and potential undercutting to avoid interference.

Generation methods include deriving the profile from a desired motion law, then smoothing with polynomials or splines, and transforming to a 2D surface using standard construction methods. Common practice uses numerical data points or CAD-based representations. The cam profile is then manufactured by milling, grinding, or electrical discharge machining, often followed by finishing and lubrication steps to improve wear resistance.

Applications include internal combustion engines, where the cam lobes control valve timing, as well as automated machinery, packaging equipment, and textile machines. Knowledge of the cam profile is essential for predicting follower motion and system dynamics. See also: cam follower, camshaft, lobe profile.