The motor of the equipment, as a power source, also generates noise. The noise generated during the operation of the motor includes electromagnetic noise, aerodynamic noise, and mechanical noise from the motor winding. The degree of motor noise mainly depends on the power and speed of the motor. The electromagnetic noise of a motor is usually caused by the vibration of the rotor and stator excited by alternating electromagnetic fields, and is usually high-frequency noise.
Clutch noise, when the clutch is closed, generally precision pneumatic presses will produce noise. This is the intermittent sound generated by the impact of the inertial force of the slider and connecting rod in reciprocating motion and the centrifugal force of the crankshaft rotating mass. The main factor causing clutch noise is the impulse when the clutch is closed, which depends on the impact speed of the punch when the mass remains constant, and is also related to the stiffness and damping characteristics of the contact material itself.
These mechanical noises have little impact on the stamping accuracy of equipment with sufficient tonnage. Therefore, when choosing a precision air pressure punch, everyone should choose a brand with low noise and stable performance.
The crank connecting rod slider structure of the operating components of the precision pneumatic punch has three pairs of friction pairs, namely the connecting rod small end and the slider ball head seat; Crankshaft neck and crankshaft shoes; The crankshaft neck and connecting rod big end bearing shells. Due to production debugging errors, there are inevitably gaps between these components. When the relative motion between parts transitions from free motion to contact motion, it will inevitably lead to collisions, and the larger the difference, the greater the noise. In addition, when the gap is fixed, the larger the number of strokes of the slider, the greater the noise.