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Address: Zhouwangzhuang Village, Shankou Town
Taian City Shandong Province China
CNC lathe manufacturers talk about the methods of maintaining accuracy of compound CNC lathe
The indexing accuracy and quasi-stop accuracy of the electric spindle system of the turn-milling compound CNC machine tool is an important index to evaluate the spindle accuracy of the machine tool, and an important factor to affect the machining accuracy of the machine tool. During operation, the rotation of the motor rotor drives the rotation of the main shaft. The speed loop and position loop of the spindle rotation adopt high-precision feedback elements to achieve full closed-loop control. The position signals collected by the feedback elements are processed by the frequency division of the CNC system, so that the resolution of the spindle indexing reaches 0.001 ° or less, so that the spindle system of the turn-milling compound CNC machine tool has high indexing accuracy and quasi-stop accuracy. In order to achieve high indexing accuracy and quasi-stop accuracy of the electric spindle system, the internal spindle motor is used in the international turn-milling complex machining centers. The spindle and the motor rotor are assembled into one body to reduce the impact of the intermediate transmission link on the spindle accuracy.
Precision preservation solution:
1. The motor rotor and the machine tool spindle adopt special assembly process to ensure the connection rigidity of the machine tool spindle and the inner hole of the motor rotor, and can transmit large cutting torque.
2. High-level high-speed dynamic balance is adopted during the assembly and allocation of the electric spindle to reduce the residual unbalance of the spindle group and ensure the stability of the spindle during high-speed rotation.
3. The electric spindle system adopts the spindle braking and damping device. When the spindle is required to stop milling or drilling, the spindle is in the braking state to ensure that the spindle does not shake during milling. During continuous indexing milling, the spindle is in damping state to ensure the stability of spindle rotation during milling. The braking state and damping state can be switched automatically and set by programming.
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