CNC lathe spindle assembly structure

CKA6150 CNC lathe spindle is a hollow stepped shaft. A spindle bore for leading through the bar when the materials detached by a long rod, means may also be used by pneumatic, electric and hydraulic clamping device. The leading end of the spindle taper hole metric 90mm, for mounting the front top cover and the top. It may also be installed a spindle, using tapered friction fit direct drive spindle and workpiece rotation. Cone spindle back-end process for the hole.

The CNC lathe spindle is mounted on three supports. There are three front support rolling bearing, in front of the C-level precision 3182124k double row cylindrical roller bearings, for absorbing radial forces. This bearing has the advantages of good rigidity, high precision, small size, and large bearing capacity. The rear support uses a pair of 7020ACTA / P5DBB radial thrust bearings. Spindle support has a great impact on the accuracy and rigidity of the spindle of a CNC lathe. The spindle bearing of a CNC lathe should run without clearance (or a small amount of interference), which directly affects the machining accuracy of the machine tool. Therefore, the clearance of the spindle bearing must be adjusted regularly. The adjustment method of the front bearing clearance is as follows: first loosen the lock screw on the front adjusting nut, and then tighten the adjusting nut. At this time, the 3182124k inner ring moves to the right relative to the main shaft cone. Because the inner ring of the bearing is very thin, and spindle taper hole and also as having a taper 112 is, therefore, while the inner ring axially movable radially elastically expanded to adjust the degree of the radial bearing clearance or preload, adjusted properly, tighten the adjusting nut Locking screws. Glaze spindle runout and runout tolerance is 0 0imrrJ. The radial runout of the CNC lathe spindle affects the roundness and concentricity of the machining surface; the axial runout affects the flatness and pitch accuracy of the machining end face. In general, when the runout of the main shaft exceeds the allowable value, only the clearance of the front support needs to be adjusted appropriately to make the main shaft runout quantifier within the allowable value; if the radial runout still fails to meet the requirements, the rear bearing should be adjusted.

The lubrication of the front and back support of the spindle of the CNC lathe is supplied by the lubricating oil pump. The lubricating oil sufficiently lubricates the bearing through the oil inlet hole, and takes away the heat generated by the operation of the bearing. In order to avoid oil spills, oil groove type seals are used at the front and rear supports, that is, there are annular grooves with a sawtooth section on the outer surface of the front nut and the rear support sleeve. It was thrown into the oil tank of the flange along the inclined surface (toward the tank), and the oil flowed to the bottom of the tank through the oil return hole, and then returned to the oil pool in the left bed leg.

There are three halogen wheels on the spindle of the CNC lathe. Two meshing gears are not simultaneously right side, when the gear 702 (z = 68) and the gear 703 meshes: when (z 50) from the spindle at low speed; when two gears are disengaged, the spindle is neutral; When the gear 703 <. = 50) and engaging the gear 702 (z = 68) from the spindle is in high gear. Gear 705 (z = 66) for connection with the encoder shaft gearing.