Machining challenges
Eccentric cam geometry requires careful alignment to the journal datums. Heat-treatment distortion, journal finish and dynamic balance are key concerns.
Manufacturing route
Blank preparation and pre-heat treatment; rough and semi-finish turning; carbonitriding; center-hole correction; finish grinding; polishing and balancing.
Key control points
Control cam phase and journal alignment, heat-treatment distortion, surface hardness and finish. Critical journals and the cam profile require a specified finish of Ra ≤ 0.4 µm.
Dimensional and surface inspection
Inspection includes cam profile and phase, journal dimensions and roundness, surface finish, case depth and hardness, magnetic particle testing and dynamic balance.
The requirements and manufacturing route shown here apply to this project. New components are reviewed against their own drawings and agreed specifications.
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