Mechanical Spindle Working Principle And Maintenance Method

- Sep 05, 2017 -

The mechanical spindle refers to the axis on which the workpiece or tool rotates on the machine. Spindle parts are usually composed of spindle, bearing and drive parts (gears or pulleys). In the machine is mainly used to support the transmission parts such as gears, pulleys, transmission movement and torque, such as machine tool spindle;

Machine mechanical spindle refers to the machine tool to drive the workpiece or the rotation of the tool shaft. Spindle parts are usually composed of spindle, bearing and drive parts (gears or pulleys). In the machine is mainly used to support the transmission parts such as gears, pulleys, transmission movement and torque, such as machine tool spindle; In addition to planer, broaching machine, such as the main movement of the linear movement of machines, most of the machine tools have spindle components. The kinematic accuracy and stiffness of the spindle parts are important factors to determine the machining quality and the cutting efficiency. The index of measuring the performance of spindle parts is the adaptability of rotational precision, stiffness and speed. ① Rotation accuracy: the radial and axial runout (see form-position tolerance) in the direction of spindle rotation affecting machining accuracy is mainly determined by the manufacturing and assembling quality of the spindle and bearing. ② dynamic and static stiffness: mainly depends on the bending stiffness of the spindle, the stiffness and damping of the bearing. ③ Speed Adaptability: Allows the maximum speed and speed range, mainly depends on the bearing structure and lubrication, as well as the heat dissipation conditions.

Mechanical Spindle Maintenance

Reduce the working temperature of the bearing, often using the method is lubricating oil. Lubrication methods are, oil and gas lubrication methods, lubrication fluid circulation two kinds. Note the following points when using these two methods:

1, in the use of oil circulation lubrication, to ensure that the spindle constant temperature tank oil enough sufficient.

2, oil and gas lubrication is just the same as the fluid circulation lubrication, it as long as the bearing space capacity can be filled.

The advantage of cyclic lubrication is that, in the case of lubrication, it can reduce the friction and heat, and can absorb some of the heat of the spindle assembly.

The lubrication of the spindle also has two types of discharge: Oil mist lubrication and injection lubrication.

General knowledge of mechanical spindle

Oil mist and oil-gas lubrication are generally used for steam turbine oil No. 32nd. Oil and gas lubrication system should be opened before the spindle of the lubricating machine is started operation, and then the lubrication system will be closed after the spindle is shut down. Water cooling is a common way of cooling the main shaft, requiring cooling water has a certain rust-proof function, when necessary, the cooling water should be properly filtered, the main shaft before the operation should be opened cooling system to start cooling. The spindle of the machine tool can be slowed down, but the corresponding input voltage (inverter output) parameters must be adjusted according to the design characteristic curve of the motor. The use of oil mist or hydrocarbon lubrication of the spindle also need to ensure that compressed air drying clean.

The parameters of the spindle are different, and the requirements of the inverter are different. Select the inverter to match the machine tool spindle parameters, wherein the rated current of the inverter is at least 1.3 times times the spindle of the machine tool, preferably at more than 1.5 times times. There are three kinds of lubrication methods used in spindle: grease, oil mist and oil and gas. Grease lubrication structure is simple, easy to use, green and environmental protection; oil mist lubrication can adapt to a higher speed, the current application is also the most extensive, but it has a certain impact on the environment; Oil and gas lubrication is the best, can adapt to higher speed, no pollution to the environment.


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