Post Processing Operations for CNC Machined Parts

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  • Source:Orbis Parts



CNC machining is renowned for producing parts with exceptional dimensional accuracy and complex geometries directly from digital designs. However, the journey from a raw block of material to a finished, readytouse component often doesn't end with the last machining pass. Postprocessing operations are critical, valueadding steps that enhance the part's functionality, durability, and aesthetics, ultimately determining its success in the final application.


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The choice of postprocessing is driven by the part's material and its intended use. For components requiring smooth movement, reduced friction, or improved corrosion resistance, surface finishing is paramount. Processes like anodizing (Type II for corrosion resistance, Type III for wear resistance) create a hard, protective oxide layer on aluminum. Passivation is used for stainless steel to restore the corrosionresistant chromium oxide layer, which can be compromised during machining. For aesthetic appeal and additional protection, powder coating and painting offer a durable, colored finish. Simpler techniques like bead blasting provide a uniform matte texture, while brushing creates a directional satin finish.

Beyond surface treatments, secondary operations address specific functional requirements. Heat treatment, such as annealing or tempering, alters the material's microstructure to increase hardness, strength, or toughness. For parts that must hold fluids or operate in vacuum environments, tumble deburring or more precise vibratory finishing is essential to remove sharp edges and microscopic burrs left from machining, ensuring safety and performance.

Furthermore, some projects demand operations that go beyond the capabilities of a standard 3 or 5axis CNC mill. This is where our comprehensive "onestop" service proves invaluable. We seamlessly integrate additional machining (like drilling and tapping on a part's other faces), precision grinding for ultratight tolerances, or sheet metal fabrication to create enclosures for your machined components.

By expertly selecting and executing the right postprocessing operations, we transform a precisely machined piece into a highperformance, reliable, and marketready product. This holistic approach to manufacturing not only saves you time and simplifies your supply chain but also guarantees that the parts you receive are perfectly suited for their enduse, driving your product's quality and reliability to new heights.