How the manufacturing process of electric nail drill machine affects the noise level

As an indispensable professional tool in the modern nail industry, the noise level of the electric nail drill machine not only affects the operator's experience, but also poses a potential threat to the working environment and human health. In view of this problem, it is particularly important to deeply analyze the noise sources of the electric nail drill machine and optimize its manufacturing process.
The noise sources of the electric nail drill machine can be divided into many types, mainly including mechanical noise, electromagnetic noise, aerodynamic noise and load noise. The quality of the manufacturing process directly affects the generation and propagation of these noises. Therefore, optimizing the manufacturing process is the key to reducing noise.
Mechanical noise mainly comes from the friction and vibration of the rotor, stator and bearing of the motor during high-speed operation. When the processing technology of the bearing is not up to standard, such as the inner wall smoothness, roundness and surface roughness do not meet the requirements, or the roundness of the bearing hole is out of tolerance, it may cause the bearing to run unbalanced, thereby causing irregular impact and noise. In addition, the dynamic balance accuracy of the rotor is also an important factor affecting mechanical noise. Poor dynamic balance will directly lead to increased mechanical vibration, thereby aggravating the noise problem.
Electromagnetic noise is caused by changes in the magnetic field inside the motor. In electric nail drills, brushless motors control current switching through electronic commutators, which may generate electromagnetic noise. By optimizing the manufacturing process, such as reducing the air gap flux density, increasing the air gap, adopting the armature skew slot design, and increasing the rigidity of the base, the generation of electromagnetic noise can be effectively reduced.
Aerodynamic noise is mainly caused by eddy currents and turbulences in the rotation of the fan and rotor of the motor. In order to reduce aerodynamic noise, measures such as sealed soundproof covers, increasing the gap between rotating parts and fixed parts, improving the shape of the wind guide cover, and reducing the circumferential speed of the rotor surface can be used in the manufacturing process to effectively suppress the generation of aerodynamic noise.
Load noise is an inevitable noise of electric nail drills during operation, mainly due to manufacturing tolerances, assembly gaps, and surface damage and damage caused by electrical corrosion during operation, transportation, and installation. In order to reduce load noise, the manufacturing process needs to strengthen the detection of the smoothness, roundness, and surface roughness of the inner wall of the bearing to ensure the quality of the bearing hole and the shaft head, and avoid excessive gaps during assembly.
In view of the above noise sources, the manufacturing process optimization of electric nail drills can start from the following aspects:
Optimization of bearing processing technology and material selection: Ensure that the smoothness, roundness and surface roughness of the inner wall of the bearing meet the standards, thereby reducing the generation of mechanical noise.
Improvement of rotor dynamic balancing accuracy: Use high-precision dynamic balancing test equipment to ensure the stability of the rotor during operation and reduce mechanical vibration and noise.
Optimization of motor design: Effectively reduce electromagnetic noise by reducing air gap flux density, increasing air gap and adopting armature skew slots and other design methods.
Improvement of fan and air guide cover design: Use sealed soundproof covers, increase component gaps and other methods to reduce aerodynamic noise.
Quality control during manufacturing and assembly: Strengthen quality monitoring of each link to ensure the accuracy and quality of each component, thereby reducing the generation of load noise.