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The high precision of the CNC machining center is reflected in the machining accuracy of the product and the precision of the equipment itself. The guarantee of these two points is inseparable from the participation of the high-precision electric spindle. A high-speed motorized spindle is a newly developed technology in recent years. It is an important part of the machining center and the main component that highlights the high-speed and high-precision advantages of the CNC machining center. So what does a high-precision spindle look like, and what are the advantages of a high-precision spindle?
If the selection of the main shaft of the machining center is unreasonable, the rigidity of the main shaft is poor, or the felt sealing method that cannot be used for a long time is adopted, it is very easy for the coolant to enter the main shaft structure, resulting in damage to the internal bearings of the main shaft structure and greatly reducing the service life of the main shaft. In order to avoid the problem of low accuracy, the spindle structure used for high-precision machine tools should be set at 0.005 to 0.010mm for a high-precision grinder spindle with a diameter of about 170 mm; and for a high-precision lathe spindle with a diameter of about 170 mm. Above 0.020mm, the spindle that can meet the appeal requirements can be defined as a high-precision spindle, which can ensure high precision in CNC machining.
The first groove, the sealing ring, the end cover, the stepped groove, the shell, the threaded mounting hole, the second groove, the first bearing, the spacer ring, the second bearing, the bearing locking adjustment piece, the fixing nut, the locking bolt, O-rings.
The common layout of the high-precision electric spindle is that the click is located between the two bearings of the spindle, and its main structure includes the tool clamping system, the motor and the cooling system. The tool clamping system is located at the shaft end of the spindle, and the shape of the shaft end depends on the type of machine tool and the installation form of the tool. The cooling system is the main structure for heat dissipation of the built-in motor, and the motor is the necessary power system for lathe work. Its work relies on the energy provided by the motor to drive the cutting action of the tool on the machined parts, and the clamping system and cooling system device are designed according to the specific process requirements.
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