Matching Precision Requirements
For ultra-high-precision components requiring tolerances of ≤±0.005mm and surface roughness of Ra ≤0.4μm, prioritize 5-axis CNC machining or Swiss-type (sliding headstock) machining to avoid the inability of standard turn-mill processes to meet specifications.
For standard precision parts with tolerances in the ±0.01mm to ±0.05mm range, turn-mill and precision grinding processes are sufficient, eliminating the need for costly ultra-precision equipment.
For parts with complex, irregular curved surfaces or deep cavities, prioritize 5-axis CNC machining to minimize positioning errors caused by multiple setups.
Matching Material Properties
Hard-to-machine, high-hardness materials-such as titanium alloys and nickel-based alloys-are suitable only for 5-axis CNC machining; specialized cutting tools and temperature control systems are required to minimize thermal deformation.
For engineering plastics like PEEK, prioritize turn-mill or Swiss-type machining to prevent edge chipping or cracking caused by the high-speed cutting associated with 5-axis machining.
Standard aluminum alloys and stainless steels are compatible with all three mainstream CNC processes; the specific choice can be further refined based on the part's structure.
Considering Part Structure and Geometry
For rotational parts such as shafts and sleeves, prioritize turn-mill machining; this allows all operations to be completed on a single machine, significantly shortening the production cycle.
For small, slender parts, prioritize Swiss-type machining to prevent deformation caused by machining vibrations and to ensure concentricity and straightness.
For large, heavy parts that exceed the machining capacity of Swiss-type machines, select 5-axis CNC or large-travel turn-mill equipment.
