Various parts of precision CNC machining
1. Parts with high precision requirements
The precision requirements of precision CNC machining parts mainly refer to theprecision requirements of size, shape, position and surface, and the surfaceprecision mainly refers to the surface roughness. Because the CNC lathe hasgood rigidity, high precision in manufacturing and tool setting, and can easilyand accurately perform manual compensation and automatic compensation, it canprocess shaft parts with high dimensionalaccuracy. In some cases, it can achieve the effect of turning instead ofgrinding. In addition, because the motion of the CNC lathe is realized byhigh-precision interpolation and servo drive, it can process parts with highshape accuracy requirements such as straightness, roundness, and cylindricity.
Because the CNC lathe can complete a lot ofprocessing content in one clamping, it can effectively improve the positionaccuracy of the parts, and the processing quality is stable. The CNC lathe hasthe function of cutting at constant linear speed, so it can not only cnc machine parts with small and uniformsurface roughness, but also suitable for turning parts with different surfaceroughness requirements. Generally, the machining accuracy of CNC lathes canreach 0.001mm, and the surface roughness Ra can reach 0.16μm (precision CNClathes can reach 0.02μm).
2. Parts with small surface roughnessvalues
The precision CNC machining numerical control lathe has aconstant linear speed cutting function, which can machine parts with small anduniform surface roughness values. The problem is that the surface roughnessdepends on the feed rate and cutting speed when the material, the finishingallowance and the tool have been determined. The cutting speed changes,resulting in inconsistent surface roughness after turning. Using the constantline cutting function of the CNC lathe, you can choose the best line speed tocut cones, spheres and end faces, so that the surface roughness values afterturning are small and consistent. .
3. Parts with complex surface contourshapes
Because the precision titanium machining CNC lathe has linearand circular interpolation functions (some CNC lathes also have some non-arccurve interpolation functions), it can turn complex shapes composed ofarbitrary straight lines and various flat curves. Body parts, including listcurves that cannot be described by equations that are processed by fittingcalculations. As shown in Figure 4-1, the molding surface of the closed cavityof the shell part cannot be machined on an ordinary lathe, but it can be easilymachined on a CNC lathe.
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