Radial drilling machine, also known as cross arm drilling machine. The spindle box can move left and right on the rocker arm and rotate ± 180 degrees around the column with the rocker arm. The rocker arm can also be lifted up and down along the outer column to adapt to the processing of workpieces with different heights. Smaller workpieces can be installed on the workbench, and larger workpieces can be directly placed on the machine base or the ground. Radial drilling machine is widely used in single piece and medium and small batch production to process the holes of workpieces with large volume and weight. The radial drilling machine has a wide processing range and can be used to drill various screw holes, threaded bottom holes and oil holes of large workpieces. The main variants of radial drilling machine include sliding seat type and universal type. The sliding seat type radial drilling machine is formed by changing the base of the basic radial drilling machine into a sliding seat. The sliding seat can move along the guide rail of the bed to expand the processing range. It is suitable for boilers, bridges, rolling stock, shipbuilding, machining and other industries. The rocker arm of universal rocker drilling machine can not only make vertical and rotary movement, but also make horizontal movement. The spindle box can make tilt adjustment on the rocker arm to adapt to the processing of various parts of the workpiece. In addition, there are car type, wall type and digitally controlled radial drilling machines.

Main structure

The radial drilling machine is mainly composed of base, inner column, outer column, rocker arm, spindle box and worktable. The inner column is fixed at one end of the base, and an outer column is sleeved outside it. The outer column can rotate 360 degrees around the inner column. One end of the rocker arm is a sleeve, which is sleeved on the outer column to move up and down. Since the screw rod is connected with the outer column as a whole, and the lifting nut is fixed on the rocker arm, the rocker arm cannot rotate around the outer column, but can only rotate around the inner column together with the outer column. Headstock is a composite component, which is composed of main drive motor, spindle and spindle drive mechanism, feed and speed change mechanism, operating mechanism of machine tool and so on. The headstock is installed on the horizontal guide rail of the rocker arm and can be operated by the hand wheel to move along the rocker arm on the horizontal guide rail.

Movement form

When processing, the spindle box is fastened on the rocker guide rail by a special tightening device, while the outer column is fastened on the inner column, and the rocker arm is fastened on the outer column, and then drilling is carried out. During drilling, the drill bit performs rotary cutting and longitudinal feeding at the same time. Its motion form is as follows:

1. The main motion of the radial drilling machine is the rotary motion of the main shaft.

2. The feed motion is the longitudinal feed of the spindle.

3. Auxiliary movements include: the rocker arm moves vertically along the outer column, the spindle box moves along the length of the rocker arm, and the rocker arm rotates around the inner column together with the outer column.