FAQs

Q: Precision machining refers to the manufacturing method that controls the part tolerance within ±0.002 to 0.01mm and the surface roughness within Ra ≤ 0.8μm through CNC numerical control, grinding, EDM, turning, etc.

Q: Standard precision: ±0.01mm (conventional precision parts) – High precision: ±0.005mm (medical, semiconductor, robotics) – Ultra precision: ±0.001 to 0.002mm (optics, mirror surface, aviation)

Q: Reasons: machine tool clearance, tool wear, thermal deformation, clamping displacement – Countermeasures – Regular compensation for reverse clearance/lead screw error – Control tool life, replace tools in batches during processing – Constant temperature workshop, separate rough and finish machining, stress relief and aging – Optimize fixture positioning and rigidity

Q: Reasons: high feed rate, dull tool, poor cooling, vibration – Countermeasures – Small cutting depth, high feed rate, low feed – Use sharp new tools/coated tools/PCD/BCN – Adequate high-pressure internal cooling + extreme pressure cutting fluid – Short tool extension, shock-resistant tool handle, vibration fixture

Q: Countermeasures – Small cutting depth, fast feed rate, high rotational speed – Symmetrical layer processing, reduce cutting force – Vacuum/magnetic force/soft jaws/low melting point alloy clamping – Stress relief annealing, constant temperature processing

Q: Collision with tool: insufficient safety height, program error → Raise safety height, simulate verification – Tool snapping: thin tool shaft → Use large tool diameter, short extension, segmented processing – Overcutting: tool radius compensation error, small allowance → Verify tool compensation, leave reasonable allowance

Q: Metals: aluminum, copper, brass, stainless steel, titanium alloy, nickel-based alloy – Plastics: POM, PEEK, PTFE, PMMA, ABS – Optics/special: non-ferrous metals, electroplated nickel, germanium, zinc sulfide

Q: First piece + process inspection + final piece inspection – CMM three-dimensional coordinate full-size report – Tool life management, parameter solidification, personnel standardization

Q: Ordinary CNC: ±0.05 to 0.1mm, appearance/structural parts – Precision machining: ±0.002 to 0.01mm, mating/key parts – Differences: equipment precision, constant temperature, tools, inspection, process

Q: The stricter the tolerance, the smoother the surface, the more expensive and slower for thin-walled, deep holes, and irregular shapes – Materials difficult to machine (titanium, stainless steel, PEEK) have high costs – Small batch, fixture/programming sharing is high.