Characteristics of Grinding Machine Spindle Performance

The grinding machine spindle is mainly used to support transmission parts such as gears and pulleys, transmit motion and torque during operation. The motion accuracy and structural stiffness of the spindle are important factors determining the machining quality and efficiency of the grinder. The main indicators for measuring the performance of a grinder spindle are rotation accuracy, stiffness, and speed adaptability:

① Rotation accuracy: The radial and axial runout that occurs in the direction that affects machining accuracy when the spindle rotates (see form and position tolerances), mainly determined by the manufacturing and assembly quality of the spindle and bearings

② Dynamic and static stiffness: mainly determined by the bending stiffness of the spindle, the stiffness and damping of the bearings

③ Speed adaptability: The maximum allowable high speed and speed range are mainly determined by the structure and lubrication of the bearing, as well as the heat dissipation conditions

Maintenance of grinding machine spindle

To reduce the working temperature of bearings, lubricating oil is often used.

. Lubrication methods include oil air lubrication, oil circulation lubrication, oil mist lubrication, and spray lubrication. When using these methods, the following points should be noted:

1. When using oil circulation lubrication, ensure that the oil level in the spindle constant temperature oil tank is sufficient. The advantage of cyclic lubrication is that, while meeting lubrication requirements, it can reduce frictional heating and absorb a portion of the heat from the spindle components

2. Oil air lubrication is exactly the opposite of oil circulation lubrication, as it only needs to fill 10% of the bearing space capacity