The process of the three-jaw chuck of the machine tailstock

In the numerical control machining, the action process of the three-jaw chuck of the machine tailstock is as follows: Firstly, the clamping force is adjusted to a suitable position, and then the working parts of the three-jaw and the tailstock electric three-jaw are respectively adjusted to be slightly smaller than the blank. Hole size, ready to clamp the workpiece;

Secondly, the workpiece is lifted under the cooperation of the crane, the inner end of the small end of the workpiece is sleeved on the tailstock chuck, and the workpiece is pushed to close the big end to the three-jaw chuck of the machine tool, and the operation panel switch knob is turned to the control symbol A0. The motor rotates counterclockwise, and the planetary reducer in the electric chuck is driven by the driving pin and the transmission rod to rotate the chuck disk counterclockwise, the three claws open to clamp the workpiece, and then the three claws of the spindle end are manually clamped to complete the workpiece. Clamping. When the machining is completed, first manually release the spindle chuck, then operate the panel reset switch HK0 to the control symbol B0, the motor rotates clockwise, the chuck disk rotates clockwise, the chuck is retracted, and the workpiece is released.

After using the electric chuck, the distance between the spindle end chuck and the tailstock electric chuck can be adjusted arbitrarily due to the influence of the chuck wrench. The machine tool, the workpiece and the tailstock electric chuck are enhanced. In the processing system rigidity, the workpiece is not easy to slip and tremble, and each processing surface is completed in one clamping, which eliminates the phenomenon of the workpiece size head, the connecting knife and the tying knife, and greatly improves the surface processing quality of the workpiece. The original two manual loading and unloading of the workpiece has now become a manual loading and unloading of the workpiece, which reduces the labor intensity and shortens the working hours.

Since the magnitude and direction of the clamping force are adjusted by the motor controller, the operator only needs to issue an instruction through the operation panel. It eliminates the complicated manual operation, avoids the limitation of the narrow position between the wrench and the workpiece, and can adjust the clamping force at any time without stopping according to the condition of the blank or the change of the amount of the cutter. The core part fixing sleeve of the fixture is made of high-quality shaft blank steel. It is processed by quenching and tempering 250-280HB, and it is precisely matched with the tail hole of the machine tool to enhance the bending rigidity and ensure the coaxiality. In addition, two rows of 7216 bearings are selected to ensure The rotation of the structure is flexible.

Thanks to the KD11200 electric three-jaw self-centering chuck, the power for clamping the workpiece is driven by the Y07134 motor through the transmission rod and the rotating pin to the planetary gear reducer in the chuck, which drives the disc to rotate, so that the chuck is simultaneously oriented. Heart or centrifugation. The circuit part is provided with three glass tube fuses as overload and short circuit protection of the circuit, and the self-locking performance is good.