Medical Device Type Aluminium Profile
Types of aluminum alloy medical devices include crutches, wheelchairs, stretchers, walkers, hospital beds, rails, handrails, and the like. There are strict requirements and standards for production. Aluminum profile medical devices help your medical devices maintain tight tolerances and withstand your stringent cleaning and sterilization requirements. The new technologies and products of aluminum alloy medical devices can improve and improve clinical medicine.
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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>NSK bearing quality composition problem analysis solution NSK bearing quality composition of the problem analysis solution
1. Feel the quality of NSK bearing through the appearance. In the process of selling NSK bearing, many customers said that only the external light of the bearing is good quality; this is wrong. The appearance of the NSK bearing should be black and bright; The reason is that the steel used in the NSK bearing can be qualified and its grinding process and the cutting fluid used, etc.; /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
2, chamfering can be bright NSK bearing chamfer does not determine the quality of NSK bearing; but it reflects the processing method of NSK bearing. The chamfer is black; clarify the heat treatment by quenching; so add the hardness of NSK bearing; People think that chamfering is not good for black. It is not processed completely; this is a misunderstanding.
3, one cage is better than the two; although the new process uses an integrated cage; but it only saves data; and the performance of the reverse is worse than the two.
In general; the service life of NSK bearings is related to three elements; one is the quality of NSK bearings themselves. The second is the use of the environment. The third is the installation method.
It is common for NSK bearings to appear faulty during the operation; so there is no need to see how strange it is. It is a problem; discrimination and disposal are the key points.
1. NSK bearing temperature is too high during tissue operation; the part of the device NSK bearing promises a certain temperature; when the tissue is touched by hand; it should be normal without feeling tricky; otherwise, the NSK bearing temperature is too high.
The reason why the NSK bearing temperature is too high is that the smooth oil quality does not meet the demand or the enthalpy change; the smooth oil viscosity is too high, the tissue device is too tight (the gap is lacking), the NSK bearing device is too tight, and the NSK bearing seat is transformed on the shaft or the shell. , the load is too large, NSK bearing cage or roll body fragmentation.
2. NSK bearing noise tumbling NSK bearing promises a subtle work noise during operation; if the sound is too loud or there is abnormal noise or impact sound, it indicates that the NSK bearing is faulty.
The reason for the noise of rolling NSK bearing is more complicated; the first is the wear and tear of the inner and outer rings of the bearing. Because of this kind of wear; it destroys the cooperative connection between the NSK bearing and the shell, the bearing and the shaft; the axis is deviated from the correct orientation. When the shaft is moving at high speed, abnormal noise occurs. When the NSK bearing is exhausted; its outer metal is peeled off; it also causes the NSK bearing radial clearance to increase the abnormal sound. In addition; the bearing is smooth and lacking; constitutes a dry conflict; and the NSK bearing is broken. Waiting for abnormal movements. NSK bearings wear loose after the loose; the cage is loose and damaged; it will also cause abnormal NSK bearing damage.
Rolling NSK bearing dismantling view; can judge the fault and damage of NSK bearing according to the damage condition of NSK bearing.
1. The outer surface of the raceway is detached from the NSK bearing and the inner and outer raceways are subjected to periodic pulsating loads; then the contact stress changes during the attack cycle. When the number of stress cycles reaches a certain value; in the roll or inside, On the outer ring raceway, there is fatigue and shedding. If the load of the NSK bearing is too large, it will increase the fatigue. Others; NSK bearing device is not correct, the shaft is tortuous; the raceway will be off the surface. NSK bearing raceway The fatigue shedding will lower the accuracy of the shaft's work; the tissue will oscillate and noise.
2. NSK bearings burned NSK bearings have tempered color on the raceway and roll body. The cause of burn is usually lack of smoothness, smooth oil quality does not meet the demand or metamorphosis; and NSK bearing device is too tight.
3. The plastic deformation NSK bearing has uneven pits on the touch surface of the roller and the roller; it clarifies the plastic deformation of the NSK bearing. The reason is that the NSK bearing is under the effect of large static load or impact load; The yield limit of the data; this condition usually occurs on low-speed rotating NSK bearings.
4. NSK bearing race crack NSK bearing seat crack crack can be caused by NSK bearing cooperation too tight; NSK bearing foreign or inner ring loose; NSK bearing housing deformation; device NSK bearing appearance processing and so on.
5. The reason why the cage is broken is that it is smooth and lacking; the rolling body is broken; the seat is inclined.
6. The reason why the metal of the cage adheres to the tumbling body is that the tumbling body is stuck in the cage or is lacking in smoothness.
7. Severe wear of the raceway can be caused by foreign objects falling into the race; lack of smooth oil or smooth oil trademark is not suitable.
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NSK bearing quality composition of the problem analysis solution
Source: China Bearing Network Time: 2013-06-29