There are different tools and methods to be used in inspecting CNC machined parts.
Dimensional and Tolerance Measurement Tools
Precision and dimensional perfection are necessary for CNC machining manufacturers. These tools include modern and traditional ones.
Coordinate measuring machines (CMM): CMM is a powerful measuring device that uses a contact probe to set random points on the measured surface. It ues the touch-trigger or lazer scanner technologies to create a digital plan of the part and provide precise measures, to use CMM you must be familiar with using CAD models to compare measured data with the intended design.
Traditional Measurement Tools: To measure CNC machined parts, we can also use traditional tools such as Calipers and micrometres, which are easy to use and valuable tools when it comes to dimensional measurements.
Surface Finish Inspection
The inspection of the surface of the machined part ensures its quality and functionality. Several techniques could be used for surface inspection, such as visual inspection, one of the simplest and most efficient techniques, and Eddy Current Testing.
Hardness Testers
If material hardness is unknown, it needs to be tested to ensure that it meets the hardness requirements. There is many techniques you can use in the hardness tests such as Brinell and Vickers.
Visual Inspection
A visual inspection could be one of the most efficient inspection methods, but it requires a manufacturer with a high level of experience who is skilled in using tools like borescopes and microscopes to verify all the product parts, especially the angles, holes, and geometric tolerances, by comparing them with the engineering drawings.