What are the basic requirements for cnc machining commonly used rolling bearings?
1. The science of rotation and temperature rise is developing, the technology is progressing, the spindle speed of the aluminum cavity cnc machining is getting higher and higher, and the shift range is getting larger and larger.
Therefore, the requirements for the high-speed running stability of bearings are getting higher and higher. The temperature rise of the spindle of the machine tool is an important factor limiting the speed of the bearing. Under normal circumstances, the correct choice of bearing type, worse grade, configuration, clearance (preload) size, lubricant and lubrication method can be to some extent. Improve the high speed performance of rolling bearings.
2. Life and load capacity For heavy-duty machine tools or powerful cutting machine tools, the bearing capacity of the air filter bearing should be first.
Because for a general machine tool, the life of the spindle assembly refers to the lifetime of the spindle accuracy. Therefore, the accuracy of the bearing is required to meet the life requirements of the spindle assembly.
3. Stiffness and vibration resistance In order to ensure the processing quality of the aluminum cavity cnc processing, the spindle system must have sufficient rigidity, otherwise large recombination errors or even vibrations will occur.
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 main shaft and the bearing. The use of preloaded 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 complete noise, and it is advantageous to use a low-noise rolling bearing.
In the fault detection of aluminum cavity cnc processing, reasoning can be carried out in two aspects, namely, forward and reverse. Forward: Starting from the cause of the failure, explore its functional connection and check the impact of the cause on the result.
That is, according to the reason why the fault may occur, it is determined whether the fault is consistent with the fault phenomenon to determine the fault point.
Using reasoning, it is often ambiguous to start inferential analysis because, among many failure causes or phenomena, find out their common features.
Therefore, the fault point is determined. As the reasoning progresses step by step, it will be aware that the personality characteristics of the inference analysis object are the faults to be found.
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