How to reduce the noise during the processing of precision mechanical parts?

How to reduce the noise during the processing of precision mechanical parts?
When we are operating large machines, the sound of the machine is generally louder, so that there will be noise, which will cause other workers to cause certain troubles. The same is true for precision machining, so how to reduce precision machining parts Noise? What is the solution?
   1. Civilized production:
   More than 30% of gear transmission noise is caused by burrs and bumps. Some precision machinery parts processing plants remove burrs and bumps before the gearbox is assembled, which is a passive approach.
  2, to ensure the accuracy of the tooth blank:
  The accuracy of the size of the gear hole is required to be distributed around the middle difference of the hole deviation value, set at ±0.003-±0.005mm; if it is out of tolerance and within the range of the hole design requirements, it must be classified and transferred to the gear cutting process.
3. Control the precision of gears:
The basic requirements of gear accuracy: verified by practice, the gear accuracy must be controlled at GB10995-887~8, the linear speed is higher than 20m/s gear, the pitch limit deviation, the radial runout tolerance of the gear ring, and the tooth direction tolerance must be stably achieved Level 7 accuracy.Lemo company are professional manufacturer to process precision mechanical parts , the normal material can be aluminum, stainless steel, brass, copper,POM, PEEK and so on. 
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