The concept of mechanical spindle

It refers to a mechanical spindle rotation axis of the workpiece or tool drive on the machine. Usually consists of a spindle, bearings and transmission parts (gears or pulleys) etc. spindle components. The machine is mainly used to support transmission parts such as gears, pulleys, transmit motion and torque, such as machine tool spindle; some for clamping workpieces, such as a mandrel. In addition planer, broaching machine and other main motion to linear motion outside, most machines have a spindle assembly. Motion accuracy and structural rigidity spindle unit is an important factor in determining the processing quality and cutting efficiency. Performance indicators to measure the spindle assembly is mainly rotational accuracy, rigidity and speed of adaptation. ① rotation accuracy: radial and axial grinding spindle is rotated in the direction of impact precision beating occur (see geometric tolerance), mainly on the manufacturing and assembly quality spindle and bearings. ② dynamic and static rigidity: The main decision of the bending stiffness of the spindle, the bearing stiffness and damping. ③ speed adaptation: the maximum permissible speed and speed range, primarily determine the structure and lubrication in bearings, and cooling conditions.