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CNC Machining
What is CNC Machining?
Different processes of CNC
Characteristics of CNC
Key points of CNC design
Economic considerations

CNC machining is the process of removing solid blocks of material through high-speed rotating cutting tools, in order to produce the required parts according to drawings. The tool plays an important role in CNC machining, directly contacting the parts and removing additional materials to obtain the required parts.


ü CNC Milling

 CNC milling is a subtractive manufacturing method that uses a cutting tool to moves and rotate to remove material. CNC mills can be used for cutting and machining operations of various metal materials. It is suitable for any industry that requires precision components.


ü CNC Turning

CNC turning removes material by contacting a cutter with the high-speed rotating workpiece and is usually used to create round or tubular shapes. The CNC turning process allows the generation of complex external geometries and internal holes, including the machining of various threads.


 CNC machining has the advantages of stable quality, high accuracy, the ability to process complex surfaces, and high efficiency.


ü  Cavities and pockets: Recommended cavity depth: 4 times cavity width. End mill tools have a limited cutting length (typically 3–4 times their diameter). Deep cavity milling: Cavities with depths greater than six times the tool diameter are considered deep. A tool diameter-to-cavity depth ratio of up to 30:1 is possible using specialized tooling (maximum depth: 35 cm with a 1-inch diameter end mill tool).

ü Internal edges: Vertical corner radius,Recommended: ⅓ times cavity depth (or larger). Using the recommended value for internal corner radii ensures that a suitable diameter tool can be used and aligns with guidelines for the recommended cavity depth. Floor radius,Recommended: 0.5  mm, 1  mm or no radius.

ü thin-wall: Minimum wall thickness, recommended: 0.8 mm (metals), 1.5 mm (plastics)
Feasible: 0.5 mm (metals), 1.0 mm (plastics).

ü Holes: Diameter, recommended: standard drill bit,Feasible: any diameter larger than 1 mm. Maximum depth, recommended: 4 times nominal diameter,typical: 10 times nominal diameter, Feasible: 40 times nominal diameter.

ü Threads:Thread size,minimum: M1 (and lower, in some cases),recommended: M6 or larger. Thread length,Minimum: 1.5 times nominal diameter, recommended: 3 times nominal diameter.

ü Tolerances:Typical: +-0.1 mm,Feasible: +-0.02 mm.


CNC machining is more suitable for the following scenarios:

ü Prototype machining for design verification and engineering testing.

ü Custom machining for Low-volume production of end-use parts.


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