Strength and rigidity
When the motor is running, the mechanical force and torque of the axis are different from the type of motor and the transmission mechanism. The main force is: the gravity of the rotor component itself, the unidirectional magnetic pulling force caused by the rotor eccentric, the centrifugal force of the unbalanced weight, the load torque of the transmission mechanical on the axis by the transmission mechanical. Therefore, the axis of the motor must first have sufficient strength to ensure that the motor does not produce residual deformation or damage in the working state and processing. At the same time, the motor shaft must have sufficient stiffness so that the axis is in work, the axis disturbance is at work, and the axis disturbance is in the axis. Within the allowable range, the critical speed of the axis should also be considered, and there should be sufficient difference between the working speed and critical speed of the shaft to prevent resonance. Especially for motors with higher speeds, if necessary, you must carry out if necessary Criticism of critical speed.
Surface hardness
During the manufacturing process, the axis often collides with the assembly mold. In the process of punching and beer positioning circles, there is a certain amount of assembly. Ensure that the axis surface scratch, wounds and other phenomena are not produced in the assembly. On the other hand, if the bearings are installed on the shaft, the surface hardness of the shaft must be controlled than HV450. For rolling bearings, the requirements of the surface hardness of the shaft can be properly relaxed. Generally, surface heat treatment is generally not performed.
Surface roughness
Surface roughness is a very important surface quality control parameter. If it is sliding bearing, the high surface roughness will directly destroy the contact mask, thereby increasing the wear of the bearings. The friction between the molecules between the bearing is also harmful. Therefore, the range of our frequent control is in the use of materials and the differences in application conditions, and the range of control has changed accordingly. If it is a rolling bearings, when the surface roughness does not meet the requirements, the bearing segment of the shaft will reduce the contact surface of the bearing inner circle, and the coordination will become loose, causing the axis response and noise. The shaft extension segment will directly affect the connection accuracy with the load device, and it is easy to cause vibration and noise. The iron core segment will cause the changes in the air gap between the rotor and the flatness of the chip arrangement. Essence
Straight (T.I.R.)
If the straight line of the overall shaft body does not meet the requirements, it will cause imbalance in the shaft segment to vibrate the motor. In the bearing segment, the contact surface of the shaft and the bearings will be tilted, resulting in a low -speed and high current sub -product motor. The shaft extension section will vibrate and produce noise. In short, the straight line of the shaft is a necessary condition for the normal operation of the motor. In a special environment, the material of the shaft requires a certain amount of corrosion resistance.
