What are the basic requirements for CNC rolling bearings?

  1. The science of rotation and temperature rise is developing and the technology is improving. The spindle speed of CNC machining of aluminum cavity is getting higher and higher, and the speed range is getting wider. Therefore, the requirements for high-speed running stability of the bearing are becoming higher and higher. The temperature rise of the spindle bearing of the machine tool is an important factor that limits the speed of the bearing. Generally, the correct choice of bearing type, worse grade, configuration method, clearance (preload) size, lubricant and lubrication method, etc. can to a certain extent Improve the high-speed performance of rolling bearings.
  2. Life and load carrying capacity For heavy machine tools or powerful cutting machine tools, the bearing capacity of air filter bearings should be first. Because for ordinary machine tools, the life of the spindle assembly refers to the life of maintaining the accuracy of the spindle. Therefore, the accuracy of the bearings is required to meet the life requirements of the spindle assembly.
  3. Stiffness and vibration resistance In order to ensure the machining quality of the CNC machining of the aluminum cavity, the spindle system must have sufficient rigidity, otherwise there will be a large re-image error or even chatter.
    Vibration resistance refers to the ability to resist forced vibration and self-excited vibration. The vibration resistance of the spindle assembly depends on the stiffness and damping of the spindle and bearings. The use of pre-tensioned rolling bearings can effectively increase the rigidity of the spindle system.
  4. Noise In high-speed grinding machines, the noise of the grinding head bearing is an important component of the whole noise. It is advantageous to select a low-noise rolling bearing.

In the fault detection of cnc machining of aluminum cavity, inference can be performed from two aspects, namely forward and reverse. Forward: starting from the cause of the failure, exploring its functional connection, and checking the effect of the cause on the result.
That is, to determine the fault point based on the reasoning that may cause this kind of fault, and see if it finally matches the fault phenomenon.
Using inference method, starting to infer the analysis object is often ambiguous, because among many failure causes or phenomena, they must find their common characteristics.
In order to determine the fault point, requirements for CNC rolling bearings as the reasoning goes deeper and deeper, you will realize that the personality characteristics of the reasoning analysis object are the faults you are looking for.