A brief introduction to CNC gantry machining centers Release time：2021-12-07 12:56:32 Number of views:333

A CNC gantry machining center refers to a machining center where the Z-axis of the spindle is perpendicular to the worktable. The overall structure is a large machining center with a gantry structure, consisting of double columns and a top beam, with a crossbeam in the middle of the double columns. Especially suitable for processing large workpieces and workpieces with complex shapes. There are various types of CNC gantry machining centers, including fixed beam type (fixed beam, mobile/rotating worktable), mobile beam type (beam up and down movement, worktable forward and backward movement), mobile column type (fixed worktable, mobile gantry), and crane type (fixed worktable, crossbeam movement). The processing characteristics, capabilities, and target product processing applications are not exactly the same. Let's take a look at the structural characteristics of CNC gantry machining centers.

1. Workbench

The worktable of the CNC gantry machining center is basically rectangular. Large castings such as workbenches, beds, columns, crossbeams, and gates are made of cast iron or welded components. The inner cavity of the casting is a honeycomb shaped composite arrangement structure, with advanced design. All have undergone aging and secondary tempering treatment to eliminate residual internal stress, stabilize the material, ensure the stability of workpiece processing accuracy and machine tool life.

2. Longmen

The gantry consists of a crossbeam and two pillars. It is divided into three types: fixed crossbeam, positioning block fixed crossbeam, and random lifting.

3. Ram

Rams can be divided into two types structurally: open and closed. The open structure gate is clamped by a pressure plate on the spindle box, and the gate has a large cross-sectional area; The closed structure of the gate is clamped in the spindle box, and the cross-sectional area of the gate is small.

4. Tool magazine

There are three basic types of tool libraries in CNC gantry machining centers: turret type, drum type, and chain length type.

5. Attachment header library

The processing of large and complex parts usually requires many accessory heads. The attachment head is specially designed for CNC gantry machining centers based on the machining requirements of the workpiece. It is generally divided into right angle head, extended head, special angle head, and universal head.

6. CNC system

There are many suppliers of CNC systems, and different system brands and models can be selected according to different needs.

7. Accuracy

Machine tool accuracy refers to the original accuracy of a CNC gantry machining center without external loads. Accuracy is usually represented by its opposite - the deviation from the ideal state (referred to as error), the smaller the error, the higher the accuracy.