How To Solve The Failure Of CNC Machining Center?

The CNC machining center has faults in the shaft components. The problems often occur are the automatic tool clamping mechanism and automatic speed regulating equipment in the spindle. In order to ensure that the tool holder will not come loose in operation or during a power failure, the tool automatic clamping mechanism uses a spring clamp and is equipped with a travel switch to announce the clamping or relaxation signal. The problem that the tool cannot be loosened after being clamped can be adjusted by adjusting the pressure of the hydraulic cylinder of the loose knife and the stroke switch device or adjusting the nut on the disc spring, so as to reduce the compression amount of the spring. In addition, the spindle heating and the noise of the spindle box must also be taken seriously. When operating a CNC lathe, pay attention to whether there are abnormal noises. If there are abnormal noises, consider cleaning the spindle box and adjusting the amount of smooth oil to ensure the cleanliness of the spindle box. Replacement of spindle bearings, repair or replacement of headstock gears, etc.
Defects in the feed chain of the CNC machining center. In the feed transmission system of CNC lathes, ball screw pairs, hydrostatic screw nut pairs, roll guides, hydrostatic guides and plastic guides are used throughout. Therefore, the failure of the feed transmission chain is mainly reflected in the decline in the quality of movement. For example: the mechanical parts do not move to the specified orientation, the operation is interrupted, the positioning accuracy is reduced, the reverse clearance is increased, the noise is increased, and the bearing noise is increased after a collision.

About such problems can be prevented by:
(1) It can improve the transmission accuracy, adjust the pre-tightening force of each motion pair, adjust the loosening link, eliminate the transmission gap, shorten the transmission chain and set the reduction gear in the transmission chain, and also improve the transmission accuracy.
(2) High transmission rigidity, adjusting the pre-tightening force of the screw nut pair and supporting components, and selecting the size of the screw itself are effective ways to improve the transmission rigidity. Poor stiffness may also cause choking and vibration on the workbench or carriage, as well as the formation of reverse dead zones, which affects transmission accuracy.
(3) To improve the accuracy of the movement. If the strength and stiffness of the components are satisfied, the mass of the moving parts should be reduced as much as possible, and the diameter and mass of the rotating parts should be reduced, so as to reduce the inertia of the moving parts and improve the accuracy of the movement.
(4) The foreign body of the rolling guide rail has a greater impact. This requires excellent protection equipment. When conditions permit, automatic secretion equipment can be added. The pre-tightening force of the rolling guide rail should be selected properly. If the assembly will cause a significant increase in traction. The static pressure guide rail should have a set of oil supply system with excellent filtering effect.