Processing accuracy and productivity of gantry milling machine
The gantry milling machine includes a bed, a workbench erected on the bed and a CNC circuit control system. There is a gantry frame above the working platform, and the gantry frame also includes: the gantry towing plate, and the gantry towing plate is held on the X-axis guide rail. Z-axis guide rail, installed on the gantry frame. The beam, the beam is equipped with a Z-axis tow plate, the beam through the Z-axis guide rail, the beam is also equipped with a Y-axis guide rail.
Milling device, gantry milling machine milling device is installed on the Y-axis guide rail, so that the gantry under the control of the CNC circuit control system, the three axes of X, Y, Z three-dimensional space milling processing. The CNC gantry milling machine has high precision milling, drilling, boring, cutting and other operations.
The gantry milling machine is a horizontal milling machine created by American Whitney in 1818; To mill the spiral groove of twist bit, American Brown created the first universal milling machine in 1862, which is the prototype of elevator milling machine; around 1884; the semi-automatic milling machine appeared in the 1920s, the block can complete the automatic conversion of "feed-burst speed" or "burst speed-feed".
Milling machine with door frame and horizontal long bed body. The gantry milling machine has high processing accuracy and productivity, which is suitable for processing the plane and slope of large workpiece in batch and mass production. The CNC gantry milling machine can also process the space surface and some special parts. The gantry milling machine is made up of column and top beam. The beam can be lifted along the two columns. There are 1~2 milling heads with vertical spindle on the beam, which can move horizontally along the beam guide rail. The two columns can also be installed with a milling head with a horizontal spindle, which can be moved along the column guide rail. These mills can process several surfaces simultaneously. Each milling head has a separate motor, variable speed mechanism, control mechanism and spindle parts, etc. During processing, the workpiece is installed on the workbench and followed for longitudinal movement. The total weight of the large gantry milling machine is 850 tons. The gantry milling machine also has some variations to accommodate the different processing objects.① Gantry milling and boring machine: the beam is equipped with a milling and boring milling and boring head, its main shaft can be axial motor feeding and motion fine tuning device, fine tuning speed can be as low as 5 mm / minute.② Bridge gantry milling machine: working bench and workpiece do not move, but moved by the gantry. Its characteristic is covers an area is small, large bearing capacity, gantry travel up to 20 meters, facilitate processing specialty or heavy workpiece appearance is similar to the gantry planer, the difference is that its beam and column is not blade but with spindle milling cutter, and gantry milling machine longitudinal workbench reciprocating movement is not the main movement, but into the movement, and milling cutter rotary motion is the main movement
