Introduction of spindle of machining center
The CNC system of machining center is the core component, which is mainly used to control the action of machining center. It usually controls the position, angle and speed of the three axes of the machining center. From the above, the CNC system of the machining center is equivalent to the human brain, so the spindle of the machining center is the cutting processing, and the output of the power is equivalent to the heart of the human body. The spindle determines the cutting ability, dynamic stiffness and machining accuracy of the machining center. The start, stop and rotation speed of the spindle are controlled by the CNC system. After the spindle is installed with a tool, it can participate in the cutting of the workpiece. The spindle is the most important mechanical part of the machining center, which has a great influence on the performance, stability and machining accuracy of the machining center.
Composition of spindle of machining center
The spindle of machining center is mainly composed of spindle, spindle support, spindle bearing, spindle drive and seal. According to the different transmission parts of the spindle, it can be divided into four types: gear driven spindle, belt driven spindle, direct coupling spindle and motorized spindle. The speed and application of these four types of spindles are different. The speed of gear driven spindle is generally 6000r / min, which is more suitable for heavy cutting; belt driven spindle is also known as synchronous belt drive spindle, which is mainly driven by belt teeth, and its spindle speed is generally at 8000r / min, which is more suitable for heavy cutting occasions; direct connected spindle is composed of motor The spindle is connected by a shaft coupler to drive. The speed of this kind of spindle is generally 12000-18000r / min. the direct connected spindle is not suitable for heavy cutting, but only suitable for processing workpieces with small cutting capacity, which is suitable for finishing. Motorized spindle: its spindle is integrated with the motor, the motor is the spindle, and the main shaft is the motor. The motor and the spindle are integrated into one, and its spindle is the most in the world For a fast spindle, its speed is more than 18000r / min. if the motorized spindle adopts aerostatic bearing and maglev bearing, the maximum speed can reach 100000r / min. this kind of spindle is generally used in finish machining, not suitable for heavy cutting.
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