What Advanced Technologies are Used to Inspect and Measure Valves to Ensure Zero Defects?​

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In the world of engine valve manufacturing, inspection is not a final step but an integral part of the entire process. Advanced metrology technologies are employed to ensure absolute adherence to specifications and to achieve true zero-defect production. Coordinate Measuring Machines (CMMs) are used for first-article inspection and periodic audits to verify the complex geometry of the valve, including the concentricity of the seat to the stem.

However, for 100% in-line inspection, faster and more specialized systems are used. Laser micrometers instantly and accurately measure stem diameter at multiple points along its length. Vision systems equipped with high-resolution cameras automatically inspect the valve keeper grooves for dimensional accuracy and surface defects. Furthermore, non-destructive testing (NDT) methods like eddy current testing are used to check for surface cracks, while hardness testers verify that the heat treatment process was successful. This data is often fed back to the machining cells in a closed-loop system, creating a self-correcting manufacturing process that guarantees every valve leaving the line is flawless.