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Analysis of the problems that easily occur in the spindle configuration process of CNC lathe manufacturers

The spindle plays a role in power transmission throughout the entire operation of the CNC lathe, and its efficiency can directly affect the efficiency of the entire lathe. Therefore, when configuring and operating the spindle, it is necessary to install regulations for operation, and remember to operate at will. If there is a problem with the spindle, it should be immediately stopped for treatmentRationally, remember to run with faults. Today, we will explain to you the problems that can easily occur during the spindle configuration process.

The main shaft is a hollow stepped shaft, which passes through the steel rod when using long bar material at the inner hole position and unloading the top. It can also be used for pneumatic, electric, and hydraulic clamping device mechanisms. The taper hole of the front axle of the main shaft is 90mm, used for installing the top sleeve and front top tip. Sometimes a spindle can also be installed, using the friction force matched by the cone to directly drive the spindle The workpiece rotates, and the tapered hole at the rear end of the spindle is the process hole.

For the clearance adjustment operation between the spindle of a CNC lathe, we can roughly follow the following steps:

① Loosen the locking screw on the front nut first.

② Tighten the adjustment nut and move the inner ring to the right of the spindle cone. As the bearing inner ring is thin and the inner hole is the same as the spindle cone, it has a 112 ° taper. Therefore, while the inner ring moves axially, it undergoes radial elastic expansion to adjust the radial clearance or preload of the bearing. After the adjustment is completed, the screws on the nut are locked tightly.

The allowable deviation for radial and glaze runout of the main shaft is 00imrrJ. The radial runout of the CNC lathe spindle directly affects the roundness and concentricity of the machining surface, while the axial runout affects the flatness and pitch accuracy of the machining end face. When the spindle runout exceeds the allowable value, simply adjust the front support clearance appropriately to adjust the spindle runout quantifier to within the allowable value. If the radial runout does not meet the requirements, the rear bearing should be adjusted.

The front and rear supports of the CNC lathe spindle are lubricated by a lubricating oil pump, which provides sufficient lubrication to the bearings through the oil inlet hole. At the same time, the heat generated by the bearings during operation is taken away. To avoid oil displacement, an oil groove sealing mode is adopted at the front and rear support positions, with serrated circular grooves on the outer surface of the front nut and rear support sleeve. When the spindle of the CNC lathe rotates, due to centrifugal force, the oil will be thrown along the inclined plane (towards the box) into the oil groove of the flange plate. The oil will flow through the return hole to the bottom of the box, and then back to the oil pool in the left bed leg.

The above is a list of common issues that may arise during the spindle configuration process organized by CNC lathe manufacturers. We hope it will be helpful for everyone in configuring CNC lathe spindles in the future.