Since the development of large CNC machining centers, the total output value has gradually increased, and the domestic machine tool industry is becoming more and more prosperous. According to the appearance design of most machining centers in the market, the slicing conveyor can be adjusted to the back of the production line, which is suitable for customizing the arrangement of the production line, which is also one of the reasons why customers like it. The machine adopts high torque motor. The output of the motor can fully reflect the characteristics of the main shaft. The indexing disc has high efficiency and high precision, including 8 oil circuit joints. One air pressure is tightly confirmed and has high mobility. It can be used with oil pressure fixture.
The main shaft of the large NC machining center is a vertical machining center, the structural form is a fixed column, the worktable is rectangular and has no indexing rotation function. It is suitable for machining disc, sleeve and plate parts. It has three linear motion coordinate axes, and it can be installed on a rotary table rotating along the horizontal axis on the worktable to process spiral parts. The replacement of the machine tool adopts pneumatic mode, which is fast and convenient. The machine adopts automatic lubrication to ensure the good operation of all parts of the machine tool.
The structure of the machine tool adopts the form of horizontal carriage, and the layout is reasonable. The three-axis feed adopts precision ball screw connected with servo motor to improve the transmission accuracy. The X and y-axis guide rails of the machine adopt precision rolling linear guide rails with high feed sensitivity; The z-axis adopts rectangular hardened cast iron plastic sliding guide rail pair, which has good vibration absorption; The machine control system adopts AC servo system, which is suitable for the processing of complex parts, especially complex molds.
The machine tool spindle adopts servo spindle motor, and the spindle box is equipped with counterweight device to ensure the smooth operation of z-axis. As we all know, the spindle speed of large CNC machining center is generally high, but with the continuous improvement of spindle speed, especially the rapid and various random vibrations, the instability of rotating shaft will increase. When the anti fatigue strength of spindle is exceeded, the spindle rotation error will increase reversibly, and finally affect the machining accuracy of machine tool. Therefore, the selection of spindle speed is very important.
ken. tang@chengcg.com
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