The motor commutator can realize the bi-directional rotation of the motor, which is suitable for occasions that need to change the steering of the motor frequently. At the same time, the commutator can also control the motor speed, making the motor run more smoothly. The disadvantage is that the commutator’s…

Castings are essential in engine manufacturing. Among engine parts, castings accounted for about 35%, casting product quality directly affects the performance of engine products. There are many uncontrollable factors in the casting manufacturing process, casting defects are difficult to avoid. At present, the detection of surface defects in castings is…