Since the development of large-scale CNC machining centers, the total output value is gradually increasing, and the domestic machine tool industry is also booming. Most of the machining centers on the market have an appearance design, and the chip conveyor can be adjusted directly behind the production line, which is suitable for customized production line layout, which is also one of the reasons why customers like it. The mechanical machine adopts a high-torque motor, the motor output can be fully expressed in the characteristics of the spindle, high efficiency and high precision indexing plate, including 8 oil circuit joints, one air pressure tightness confirmation, high flexibility, can be used with hydraulic jigs.

The main shaft of the large CNC machining center is a vertical machining center, the structure is a fixed column, the worktable is rectangular, and there is no indexing rotation function. It is suitable for processing disk, sleeve, and plate parts. It has three linear motion coordinate axes and can be used in A rotary table rotating along a horizontal axis is installed on the worktable to process spiral parts. The machine tool is changed pneumatically, which is quick and convenient. The machine tool adopts automatic lubrication method to ensure the good operation of all parts of the machine tool.

The structure of the machine tool adopts the form of a cross carriage with a reasonable layout. The three-axis feed is driven by a precision ball screw connected with a servo motor to improve the transmission accuracy. The X and Y axis guides of the machine tool adopt precision rolling linear guides with high feed sensitivity; the Z axis adopts rectangular quenched cast iron-plastic sliding guide rail pair, which has good vibration absorption; the machine tool control system adopts AC servo system, and FUNAC-Oi can be selected. -Mate, Siemens 802D and other control systems are suitable for complex parts processing, especially complex mold processing.

The spindle of the machine tool adopts a servo spindle motor; the spindle box has a counterweight device to ensure the smooth running of the Z-axis. We know that the spindle speed of a large CNC machining center is generally high, but as the spindle speed continues to increase, especially when it reaches a rapid speed, various random vibrations and the instability of the rotation axis also increase. The fatigue resistance of the machine will eventually lead to an irreversible increase in the spindle rotation error, which will affect the final machining accuracy of the machine tool. So the choice of spindle speed is very important.

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