Milling Machine

Definition

Gantry milling machine, referred to as gantry milling, is a milling machine with a portal frame and a horizontal long bed. The gantry milling machine can use multiple milling cutters to machine the surface at the same time. The machining accuracy and production efficiency are relatively high. It is suitable for processing large-scale workpieces in the batch and mass production planes and slopes. CNC Gantry Milling Machines can also machine curved surfaces and some special parts.

the difference 

The shape of the portal milling machine is similar to that of a planer, except that its beams and columns are not equipped with a planer but a milling head with a headstock, and the reciprocating motion of the longitudinal table of the portal milling machine is not the main movement but the advancement. To exercise, and the rotary motion of the cutter is the main movement.

Structure

The portal milling machine consists of a portal frame, bed table and electrical control system.

The portal frame consists of a column and a top beam with beams in the middle. The beam can move up and down along the two column guides. There are 1 to 2 milling heads with vertical spindles on the crossbeam, which can be moved laterally along the crosshead rails. Two milling heads with horizontal spindles can also be mounted on the two columns, respectively, which can be moved up and down along the column guides. These milling heads can process several surfaces at the same time. Each milling head has a separate motor (up to 150 kilowatts of power), transmission mechanism, steering mechanism and spindle components.

The long horizontal bed frame has a movable table and covers. During processing, the workpiece is mounted on the table and then moved longitudinally.

There are some variants of the portal milling machine to suit different processing objects.

1Gantry boring and milling machine: milling cutters can be mounted on the beam

Gantry boring and milling head boring and milling head

The main shaft (sleeve or ram) can be used as an axial motor feed and there is a movement fine-tuning device, fine-tuning speed can be as low as 5 mm / min. For boring and milling operations.

2 gantry drilling and milling machine: The power head is installed on the crossbeam. Drilling and milling operations can be completed by installing drills or milling cutters on the post.

The gantry milling machine body is equipped with an X-axis guide rail, and the gantry milling machine table is fastened across the bed. The gantry frame is arranged above the table across the activity table. The gantry frame also includes: a gantry carriage, and the gantry carriage plate is clamped on the X-axis guide. Z-axis guide, installed on the gantry. The cross beam is equipped with a Z-axis drag plate, and the cross beam is movable and clamped on the Z-axis guide rail through the Z-axis drag plate, and a Y-axis guide rail is also installed on the cross beam. The milling device and the milling machine of the portal milling machine are installed on the Y-axis guide so that the gantry is under the control of the control system of the numerical control circuit to perform the three-dimensional space milling processing of X, Y and Z axes. The CNC milling machine has high-precision milling, drilling, boring, cutting and other operations.