The structural characteristics of the gantry machining center are mainly reflected in the following aspects:

1. Overall gantry structure: The gantry machining center adopts an overall gantry structure, which has high rigidity and high stability, can provide good machining accuracy and stability, and is suitable for various complex metal cutting processes.

3. Workbench: The workbench of the gantry machining center is basically rectangular. Large castings such as the workbench, bed, column, beam and ram are usually made of Meehanite cast iron. The inner cavity of the casting is a honeycomb composite arrangement structure with advanced design. They are all treated with aging and secondary tempering to eliminate residual internal stress to stabilize the material and ensure the stability of workpiece machining accuracy and machine tool life.

3. Gantry: The gantry machining center consists of a beam and two columns, which are divided into three types: beam fixed, beam locked by positioning block and segmented lifting, and beam arbitrary lifting.

4. Ram: The ram of the gantry machining center can be divided into two types: open and closed in structure. The ram of the open structure is clamped on the spindle box through the pressure plate, and the cross-sectional area of ​​the ram is large; the ram of the closed structure is clamped in the spindle box, and the cross-sectional area of ​​the ram is small.

5. High-precision transmission system: The gantry machining center adopts a high-precision transmission system, including gear boxes, lead screws, bearings and other components, which can ensure the high precision and high stability of the spindle during the processing.

6. Linear guide pair: The gantry machining center adopts a high-precision linear guide pair, which has the characteristics of high precision, high rigidity and long life. This guide pair can ensure the stability and precision of the spindle during the processing and improve the processing efficiency.

7. Dual motor drive: The gantry machining center adopts dual motor drive, which can provide greater processing force and higher acceleration. This drive mode can improve processing efficiency and quality, and is suitable for cutting processing of various difficult-to-process materials.

8. Automatic tool magazine: The gantry machining center is equipped with an automatic tool magazine that can automatically change tools. The basic forms of tool magazines include turrets, drums and chain lengths, which can prevent chip splashing and accidental operations.

9. Accessory head library: Gantry machining centers for large and complex parts usually require many accessory heads. The accessory heads are specially designed according to the processing requirements of the workpiece, and are usually divided into right-angle heads, extended heads, special angle heads, universal heads, etc.

10. CNC system: Gantry machining centers are usually equipped with a new generation of CNC systems, which have a high cost performance.

In general, the structural design of the gantry machining center fully considers factors such as rigidity, stability, precision and efficiency, ensuring precise and efficient work under various processing conditions.