What methods can be used to improve the accuracy of mechanical parts processing?
Published Time:
2026-08-19
Regular equipment accuracy calibration and maintenance
1. Improve the accuracy of the equipment itself
Regular equipment accuracy calibration and maintenance
Calibrate the positioning accuracy, repetitive positioning accuracy, and screw rod clearance of the machine tool coordinate axis; do a good job of guide rail lubrication and spindle maintenance to reduce dimensional drift caused by clearance.
Reasonable selection of equipment
Use a machining center/engraving machine for high-precision features. Do not use ordinary equipment to forcefully process parts with high tolerance requirements.
Control device environment
The precision machining area has constant temperature and shock absorption to avoid vibration causing tool vibration and dimensional fluctuations.
2. Optimize tooling fixtures and reduce clamping errors
Improve the accuracy of the fixture positioning surface and reduce the positioning gap; use reasonable positioning benchmarks and follow the principle of unified benchmarks.
Moderate clamping force: Prevent parts from being extruded and deformed (especially thin-walled plastic parts, thin sheet metal, and aluminum parts).
Reduce multiple clampings, complete multi-faceted processing in one clamping as much as possible, and eliminate accumulated errors in repeated clampings.
The fixtures should be cleaned regularly to remove aluminum chips, burrs, and dust to avoid foreign matter on the positioning surface causing parts to be lifted and offset.
3. Tool (machining)/mold (injection molding) control
CNC machining
Choose tools with sufficient rigidity and sharp edges; replace worn tools in a timely manner. Tool wear will directly lead to larger sizes and rough surfaces.
Reasonably design the tool path to avoid force deflection of parts caused by large margin unilateral cutting.
Plastic injection molded parts (dimensional accuracy control)
Mold cavity size pre-compensates for material shrinkage;
Maintain the mold regularly to prevent cavity wear and insert gaps from becoming larger;
Ensure the ejection mechanism is synchronized to avoid product deformation caused by uneven ejection force.
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