What are the basic requirements for CNC machining rolling bearings with aluminum cavity? How to reason CNC machining failure?

The main component of CNC machining of aluminum cavity is the spindle assembly, which is also composed of the spindle, the bearing, the transmission parts installed on the spindle and some fasteners.Whether it can work normally has a great impact on the quality and production efficiency of the workpiece, among which the bearing is the most influential part on the performance of the spindle assembly.What are the basic requirements for rolling bearings commonly used in CNC machining of aluminum cavity?

1. With the development of rotation and temperature rise science and technology, the spindle speed of CNC machining of aluminum cavity is getting higher and higher, and the speed range is getting larger and larger.Therefore, the requirements for high speed operation stability of bearings are becoming higher and higher.The temperature rise of machine tool spindle bearings is an important factor to limit the speed of bearings. Under normal circumstances, the right choice of bearing type, worse grade, configuration mode, clearance (preload) size, lubricant and lubrication mode can improve the high-speed performance of rolling bearings to a certain extent.

2. Life and bearing capacity for heavy machine tools or strong cutting machine tools, the bearing capacity of air filter bearings should be the first thing.Because for general machine tools, the life of the spindle assembly refers to the service life of the spindle accuracy.Therefore, the accuracy of the bearing is required to meet the life requirements of the spindle assembly.

3. Stiffness and anti-vibration In order to ensure the machining quality of CNC machining of aluminum cavity, it is necessary to make the spindle system have sufficient stiffness, otherwise there will be large replication error or even vibration.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 bearing.The stiffness of the spindle system can be improved effectively by using preloaded rolling bearings.

4. Noise In a high-speed grinder, the noise of the grinding head bearing is an important component of the overall noise, and it is advantageous to choose low noise rolling bearings.

In the fault detection of CNC machining of aluminum cavity, the reasoning can be carried out from two aspects, namely forward and reverse.Forward: that is, starting from the cause of the fault, explore its functional connection, check the effect of the cause on the result, that is, according to the probable cause of the fault reasoning, to see whether it is consistent with the fault phenomenon, to determine the point of failure.

Using the reasoning method, the beginning of the reasoning analysis object is often ambiguous, because, in many fault causes or phenomena, to find out their common characteristics, so as to determine the point of failure, with the step by step in-depth reasoning, will realize the personality characteristics of the reasoning analysis object, is to find the fault.

The replacement method is to observe the operation of the ALUMINUM cavity CNC machining center through the substitution and comparison of the same functional modules or components on the premise of spare parts, so as to analyze and judge the fault.The above method is simple, but effective, especially when there are multiple sets of the same aluminum cavity CNC machining, more practical.

To find and eliminate the failure of the NUMERICAL control system, there is no invariable rules, as long as you can safely troubleshoot, no matter which method can be used, to improve maintenance skills, through a lot of maintenance practice to accumulate and explore experience.