Structure of precision gantry milling machine

The precision gantry milling machine is a gantry frame horizontal long bed milling machine. Gantry milling machine can use multiple milling cutters to process curved surfaces at the same time, with high machining accuracy and high production efficiency. It is applicable to the plane and bevel processing of large workpieces in batch production. CNC gantry milling machine can also process spatial surfaces and some special parts.

The appearance of the precision gantry milling machine is similar to that of the gantry planer, but the difference is that the crossbeam and column of the precision gantry milling machine are not installed with the planer tool rest, but with the milling tool rest with the spindle box. Moreover, the reciprocating motion of the longitudinal workbench of the gantry milling machine is not the main motion, but the feeding motion, while the rotary motion of the milling cutter is the main motion.

The precision gantry milling machine is composed of a gantry, a machine bed workbench and an electrical control system. The portal frame is composed of columns and top beams, with beams in the middle. The beam can move up and down along the guide rails of the two columns. There are several milling heads with vertical spindle on the beam, which can move laterally along the beam guide rail. A milling head with a horizontal spindle can also be installed on the two columns, and the milling head can move up and down along the column guide rail. These milling heads can machine several surfaces at the same time. Each milling head has a separate motor, speed change mechanism, control mechanism and spindle components. The horizontal bed is provided with a movable workbench, which is covered with a shield. During processing, the workpiece is installed on the workbench and moves longitudinally.

The beam of the precision gantry milling machine is equipped with a milling and boring cutter head, and its main shaft can conduct axial electric feed, and it is equipped with a motion fine adjustment device, so the fine adjustment speed is low. It can be used for drilling and milling. The power head is installed on the beam, and the drilling and milling operation can be completed by connecting the drill pipe with a drill or milling cutter. The bed is equipped with X-axis guide rail, and the gantry milling machine workbench is fastened on the bed. The gantry frame is installed in the movable span above the workbench. The gantry frame also includes the gantry carriage, which is clamped on the X-axis guide rail. The z-axis guide rail is installed on the gantry frame. The beam is equipped with Z-axis carriage, which is clamped on the Z-axis guide rail through Z-axis carriage, and the beam is also equipped with Y-axis guide rail. Milling device: The milling device of the gantry milling machine is movably installed on the Y axis guide rail, so that the gantry rack can be milled in the three-dimensional space of X, Y, Z axis under the control of the CNC circuit control system. CNC gantry milling machine has high-precision milling, drilling, boring and cutting operations. Classification of species forms

According to whether the gantry frame moves, it can be divided into gantry fixed workbench moving and gantry moving. Bridge gantry milling is characterized by small floor area and large bearing capacity. The travel of the gantry frame can reach 20m, which is convenient for processing ultra long or overweight workpieces. Whether the beam moves on the column can be divided into movable beam type and fixed beam type; The movement of beam on elevated bed is called elevated bed.

System division of precision gantry milling machine

It is divided into ordinary type and CNC type. The manufacturer has developed digital intelligent gantry milling with one key conversion between ordinary milling and CNC milling, which is more flexible and practical. The capacity can be divided into light, medium and heavy gantry milling.