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What are the basic requirements for commonly used rolling bearings used on CNC Machine

Dec. 16, 2019

1. The science of rotation and temperature rise is developing, the technology is improving, the CNC machining spindle speed is getting higher and higher, and the speed range is getting wider.

As a result, the requirements for high-speed running stability of bearings have become 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 the method, clearance (preload) size, lubricant and lubrication method, etc. can to a certain extent Improve the high-speed performance of rolling bearings.

CNC Machined Parts

CNC Machined Parts

2. Service life and load carrying capacity for heavy machine tools or powerful cutting machine tools, the bearing capacity of air filter bearings should be first.

For ordinary machine tools, the life of the spindle assembly refers to the service 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 CNC Machined Parts, the spindle system must have sufficient rigidity, otherwise there will be large re-image errors or even chattering.

Vibration resistance refers to the ability to resist forced vibration and self-excited vibration. The vibration resistance of the main shaft assembly depends on the stiffness and damping of the main shaft and bearings. The use of pre-tensioned rolling bearings can effectively increase the rigidity of the spindle system.

4. Noise In the high-speed grinding machine, the noise of the grinding head bearing is an important component of the whole noise, and it is advantageous to select a low-noise rolling bearing.

In CNC machining fault detection, the 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, as the reasoning goes deeper and deeper, you will realize that the personality characteristics of the reasoning analysis object is the faults you are looking for.

CNC Machining has the following advantages:

①Reduce the number of tooling a lot, and do not need complicated tooling to process complex shaped parts. If you want to change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.

② The processing quality is stable, the processing accuracy is high, and the repeat accuracy is high, which is suitable for the processing requirements of the aircraft.

③ The production efficiency is higher in the case of multi-variety and small batch production, which can reduce the time for production preparation, machine tool adjustment and process inspection, and reduce the cutting time due to the use of the optimal cutting amount.

④ It can process complex profiles that are difficult to process by conventional methods, and can even process some unobservable processing parts.

CNC is also called computer gong, CNCCH or CNC machine tool. It is actually a kind of name in Hong Kong. Later it was introduced into the Pearl River Delta in mainland China, which is actually a CNC milling machine. Our company is CNC Machining Cutting Service Supplier, welcome to consult.