Management of imported bearing antirust auxiliary materials from fag
The fit clearance between fag imported bearing and shaft must be appropriate to make the service life of fag imported bearing longer. The following methods can be used to detect the radial clearance of fag imported bearing:Management of imported bearing antirust auxiliary materials from fag
Management of imported bearing antirust auxiliary materials from fag
For fag imported bearings with large diameter, the clearance is large, so it is proposed to use a narrow feeler gauge for direct detection. For fag imported bearing with small diameter, the clearance is small, which is convenient to measure with feeler gauge, but the side clearance of fag imported bearing must be measured with feeler gauge with appropriate thickness.
Lead pressure detection method
It is more accurate to detect the clearance of fag imported bearing with lead pressing method than with feeler gauge, but it is more troublesome. The aluminum wire used for testing should be soft and moderate in diameter. It should not be too large or too small. The ideal diameter is 1.5 ~ 2 times of the gap. In practical work, soft lead wire is usually used for testing.
During the inspection, first open the fag inlet bearing cover, select the lead wire with appropriate diameter, cut it into a small section with a length of 15 ~ 40mm, put it on the journal and the interface between the upper and lower fag inlet bearings, cover the fag inlet bearing cover, tighten the fixing bolts according to the specified torque, then loosen the bolts, remove the fag inlet bearing cover, detect the thickness of the flattened lead wire with a micrometer, and calculate the average value of the top clearance of the fag inlet bearing.Management of imported bearing antirust auxiliary materials from fag
If the top clearance is too small, a pad can be added on the joint surface of the upper and lower tiles. If it is too large, the pad shall be reduced, scraped or the tile shall be poured again.Management of imported bearing antirust auxiliary materials from fag
Adjustment of bearing bush tightening force: in order to prevent the possible rotation and axial movement of the bearing bush in the working process, in addition to matching the interference and stop parts, the bearing bush must also be compressed with fag imported bearing cover. The measurement method is the same as the top clearance measurement method. In addition to measuring the thickness of soft lead wire, the bearing bush tightening force can be calculated.Management of imported bearing antirust auxiliary materials from fag
Generally, the pressing force of bearing bush is 0.02 ~ 0.04 mm. If the pressing force does not meet the standard, it can be adjusted by increasing or decreasing the thickness of the gasket at the joint surface of fag inlet bearing and bearing seat, and the pad back is not allowed to be padded.Management of imported bearing antirust auxiliary materials from fag
In addition to ensuring the radial clearance, the sliding bearing should also ensure the axial clearance. When detecting the axial clearance, move the shaft to an extreme position, and then measure the displacement of the shaft from one extreme position to another with a feeler gauge or dial indicator, that is, the axial clearance. When the clearance of sliding bearing does not meet the requirements, it shall be adjusted. Split fag imported bearings often use gaskets to adjust the radial clearance.Management of imported bearing antirust auxiliary materials from fag
Cooling water mainly plays multiple roles in fag imported bearing processing, such as cooling, lubrication, cleaning and rust prevention. Its correct use and maintenance directly affect the surface quality of processed parts and the service life of cutting tools. The cooling water used can be roughly divided into soda water, emulsion and synthetic grinding fluid. Basically, more than 50 tons of groove fluid is used for large-scale recycling. The washed grinding products, grinding wheel dust, iron filings and oil stain are easy to cause the corruption and deterioration of cooling water, resulting in burns and corrosion of machined parts. Strengthening the scientific management of cooling water can improve its performance, ensure product quality and reduce the use cost of cooling water.
In order to ensure that the antirust process can be seriously implemented, the technology department formulates specific assessment rules according to the process requirements, and fag imports bearings and converts the component value to assess the manufacturer. Management of imported bearing antirust auxiliary materials from fag
The first-class antirust management personnel shall conduct a monthly process discipline inspection on the production plant, conduct a comprehensive inspection on the management of cooling water, antirust fluid, cleaning fluid and antirust oil, as well as the corrosion rate, cleanliness and oiling packaging of finished fag imported bearings, the management level of antirust personnel and the detection of monitoring items, score the assessment, and send the assessment results to the production plant. Establish a rust prevention management network from top to bottom, so that the rust prevention work has a good management foundation.Management of imported bearing antirust auxiliary materials from fag
The quality of antirust materials directly affects the quality of product processing. Therefore, when selecting antirust materials, the physical and chemical properties shall be tested according to the quality requirements first, and then the pilot test shall be carried out after being qualified. Only when meeting the process requirements can they be used in large quantities.
The antirust auxiliary materials selected for use shall be strictly tested according to the quality standards of different materials after entering the factory. Only after fag imported bearings are qualified can they be issued and used by the supply department. During use, the antirust materials and the prepared solution shall be tested regularly to ensure that the concentration and proportion of the solution meet the process requirements and meet the service performance.
The establishment of a complete material acceptance system and quality acceptance standard provides a reliable guarantee for doing a good job in rust prevention management After the installation of IKO bearing, in order to check whether the installation is correct, operation inspection shall be carried out. Small machinery can be rotated by hand to confirm whether it rotates smoothly.Management of imported bearing antirust auxiliary materials from fag
The inspection items include poor operation caused by foreign matters, scars and indentation, unstable torque caused by poor installation and poor processing of mounting base, excessive torque caused by too small clearance, installation error and sealing friction, etc. If there is no abnormality, the power operation can be started.
Large machinery cannot rotate manually, so the power shall be cut off immediately after no-load start, and the machinery idles. Check whether there is vibration, noise, contact of rotating parts, etc. after confirming that there is no abnormality, enter the power operation.Management of imported bearing antirust auxiliary materials from fag
Power operation, starting from no-load and low speed, slowly increase to the rated operation under the specified conditions. During the test run, the inspection items are whether there is abnormal sound, IKO bearing temperature change, lubricant leakage or discoloration, etc. If any abnormality is found, stop the operation immediately, check the machinery, and remove the bearing for inspection if necessary.Management of imported bearing antirust auxiliary materials from fag
The temperature of IKO bearing can generally be inferred from the external temperature of bearing pedestal. However, it is more accurate to directly measure the temperature of the bearing outer ring by using the oil hole. The bearing temperature rises gradually from the beginning of operation, and the temperature is usually stable after 1 ~ 2 hours. Management of imported bearing antirust auxiliary materials from fag
If the bearing is not installed properly, the temperature will rise sharply, resulting in abnormal high temperature. The reasons are too much lubricant, too small bearing clearance, poor installation, excessive friction of sealing device, etc. In the case of high-speed rotation, the wrong choice of IKO bearing structure and lubrication mode is also the reason.Management of imported bearing antirust auxiliary materials from fag
The rotating sound of IKO bearing is checked with stethoscope, and there are strong metal noise, abnormal sound, irregular sound and other indications of abnormality. The reasons include poor lubrication, poor accuracy of shaft or bearing seat, bearing damage, foreign matter intrusion, etc.Management of imported bearing antirust auxiliary materials from fag
The causes of NTN bearing failure are often multifactorial. All influencing factors in the design and manufacturing process will be related to the bearing failure, which is difficult to judge by analysis. In general, it can be considered and analyzed from two aspects: use factors and internal factors. Use factors mainly refer to whether the installation, adjustment, use and maintenance, maintenance and repair meet the technical requirements. The installation condition is one of the primary factors in the use factors. Management of imported bearing antirust auxiliary materials from fag
The improper installation of the bearing often leads to the change of the stress state between the parts of the whole bearing, and the bearing operates in an abnormal state and fails early. According to the technical requirements of bearing installation, use, maintenance and repair, monitor and inspect the load, speed, working temperature, vibration, noise and lubrication conditions borne by the running bearing, find out the cause immediately and adjust it to make it return to normal. In addition, it is also important to analyze and test the quality of grease and the surrounding medium and atmosphere.Management of imported bearing antirust auxiliary materials from fag
Internal factors mainly refer to the three factors that determine the quality of bearings, such as structural design, manufacturing process and material quality.Management of imported bearing antirust auxiliary materials from fag
First of all, the reasonable design and advanced nature of the structure will lead to longer bearing life. The manufacturing of bearings generally goes through multiple processing processes such as forging, heat treatment, turning, grinding and assembly. The rationality, advanced nature and stability of all the processing technologies will also affect the life of bearings. Management of imported bearing antirust auxiliary materials from fag
Among them, the heat treatment and grinding processes that affect the quality of finished bearings are often more directly related to the failure of bearings. In recent years, the research on the metamorphic layer on the working surface of bearing shows that the grinding process is closely related to the surface quality of bearing.
The metallurgical quality of NTN bearing material was once the main factor affecting the early failure of rolling bearing. With the progress of Metallurgical Technology (such as vacuum degassing of bearing steel), the quality of raw materials has been improved. The proportion of raw material quality factor in bearing failure analysis has decreased significantly, but it is still one of the main influencing factors of bearing failure. Proper material selection is still a factor that must be considered in bearing failure analysis.
The main task of NTN bearing failure analysis is to find out the main factors causing bearing failure according to a large number of background materials, analysis data and failure forms, so as to put forward targeted improvement measures, prolong the service life of the bearing and avoid sudden early failure of the bearing. The temperature of ina bearing can be inferred from the temperature outside the bearing chamber. It is more appropriate if the oil hole can be used to directly measure the temperature of ina bearing outer ring.
Generally, the temperature of INA Bearing starts to rise slowly with the operation of the bearing, and reaches a stable state after 1-2 hours. The normal temperature of INA Bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are appropriate, the bearing temperature will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and necessary preventive measures must be taken.
Using the thermal sensor, the working temperature of ina bearing can be monitored at any time, and the automatic alarm or stop when the temperature exceeds the specified value can be realized to prevent the occurrence of combustion shaft accident.
High temperature often indicates that it is in an abnormal situation. High temperature is also harmful to the lubricant of INA Bearing. Sometimes INA Bearing Overheating can be attributed to the lubricant of the bearing. If ina bearing is kept at a temperature higher than 125 ℃ for a long time, the service life of INA Bearing will be reduced. The causes of high temperature ina bearings include insufficient or excessive lubrication and lubricant. It contains impurities, excessive load, INA Bearing Ring damage, insufficient clearance, high friction caused by oil seal, etc.
Therefore, it is necessary to continuously monitor the temperature of INA Bearing, whether it is measuring ina bearing itself or other important parts. If the operating conditions remain unchanged, any temperature change can indicate that a fault has occurred.
The periodic measurement of ina bearing temperature can be aided by a thermometer, such as a digital thermometer, which can accurately measure the INA Bearing Temperature and display it in degrees Celsius or Fahrenheit.
The important ina bearing means that when it is damaged, it will cause the shutdown of the equipment. Therefore, this kind of INA Bearing should be equipped with temperature detector.Management of imported bearing antirust auxiliary materials from fag
The bearing temperature will rise after one or two days of natural lubrication. The sound detector is used to check the rolling sound and sound quality of the running fag bearing. Even if there is slight peeling and other damage, the fag bearing will emit abnormal sound and irregular sound, which can be distinguished by the sound detector.
It is a common method to use hearing to identify irregular operation. For example, it is often used by experienced operators to detect the abnormal noise of a part with the help of an electronic stethoscope.Management of imported bearing antirust auxiliary materials from fagManagement of imported bearing antirust auxiliary materials from fag
If fag bearing is in good continuous rotation state, it will make a low whine sound. If sharp hiss, squeak and other irregular sounds are made, it often indicates that fag bearing is in poor continuous rotation condition.Management of imported bearing antirust auxiliary materials from fag
Sharp squeaking noises may be caused by improper lubrication. Improper fag inlet bearing clearance can also cause metal sound. Dents on the concave track of fag bearing outer ring track will cause vibration and cause smooth and crisp sound. If the knocking scar caused during installation will also produce noise, the noise will vary with the speed of fag bearing.Management of imported bearing antirust auxiliary materials from fag
If there is intermittent noise, it indicates that the rolling parts may be damaged. This sound occurs when the damaged surface is rolled out. If there are pollutants in fag bearing, it will often cause hissing sound. Serious damage to the bearing will produce irregular and loud noise.
Fag bearing damage can be detected by hearing, but usually it is time for fag bearing to be replaced immediately. Therefore, it is better to use, for example, electronic condition monitoring instruments. The fag bearing condition can be estimated more accurately by using a wooden stick than the old method.
The function of ina inlet bearing coordination is to make the stationary ring and rotating ring of ina inlet bearing consolidate with the stationary part (usually ina inlet bearing seat) and rotating part (usually shaft) of the installation part respectively, so as to realize the basic task of transmitting load in the rotating state and limiting the position of the moving system relative to the stationary system. On the shaft and in the ina inlet bearing seat, the rolling ina inlet bearing is required to fix its position in three directions: radial, axial and tangent directions. Radial and tangential positioning is realized through tight fit of ina inlet bearing ring, and tight fit is adopted for axial positioning only in a few cases; Management of imported bearing antirust auxiliary materials from fag
Generally, axial limit parts, such as end caps and retaining rings, are used to limit the axial position within the clearance range. Check the vibration of NTN imported bearing during operation. The peeling, indentation, corrosion, crack, wear, etc. will be reflected in the vibration measurement of NTN imported bearing. The vibration of NTN imported bearing is very sensitive to the damage of NTN imported bearing. Management of imported bearing antirust auxiliary materials from fag
Therefore, the vibration can be measured by using a special NTN imported bearing vibration meter (frequency analyzer, etc.), and the specific abnormal situation can not be inferred by frequency division. Since the measured values are different due to the service conditions of NTN imported bearings or the installation position of sensors, it is necessary to analyze and compare the measured values of each machine in advance to determine its judgment standard.Management of imported bearing antirust auxiliary materials from fag
Second, check the sound condition of NTN imported bearing during rolling. Because NTN imported bearing will emit abnormal sound and irregular sound even if there is slight peeling and other damage, it can be distinguished with a sound detector. The sound detector is used to check the rolling sound and sound quality of NTN imported bearing in operation, so as to prevent it in advance.Management of imported bearing antirust auxiliary materials from fag
Third, check the temperature of NTN inlet bearing during rotation. It is more appropriate if the outer ring temperature of NTN inlet bearing can be directly measured by oil hole. Generally, the temperature of NTN inlet bearing can be inferred based on the temperature outside the NTN inlet bearing chamber. If the lubrication and installation parts are appropriate, the temperature of NTN inlet bearing will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and necessary preventive measures must be taken.Management of imported bearing antirust auxiliary materials from fag
Generally, the temperature of NTN imported bearing rises slowly with the start of operation and reaches a stable state after 1-2 hours. The normal temperature of NTN imported bearing varies with the heat capacity, heat dissipation, speed and load of the machine.
Check the axle and find out the faults existing in Peilin before long-distance or race. In the early stage, when Peilin lubrication is seriously deteriorated, eliminate these faults in advance for lubrication or replacement, so as to avoid affecting the level of play due to hardware problems, which is very important for professional drivers and amateur drivers.Management of imported bearing antirust auxiliary materials from fag
Touch is a very simple method. In industry, the lubrication problem of Peilin can lead to high temperature, which can be felt by hand. This high temperature will be harmful to the lubricant in Peilin. It is difficult for the bicycle to rotate at that high speed, or even reach the ground that makes Peilin hot. Management of imported bearing antirust auxiliary materials from fag
The inspection touch of the bicycle is only the axis of the flower drum rotating with the hand mold, which can feel the situation inside, The vibration indicates that there are pits or the beads are not round, and the quicksand feeling is the lack of good lubrication. If the rotation is astringent and stuck, it indicates that the oil is dry or the wrong device has caused Peilin to be misaligned and too tight.Management of imported bearing antirust auxiliary materials from fag
The observation is mainly aimed at the appearance of Peilin to see whether the rubber seal has been broken. Open the rubber seal to check whether the lubricating oil is dry. Blackening means that the lubricating oil is polluted or carbonized. Whiteness and turbidity indicates water inflow. In this case, the earlier it is found, the smaller the damage after oil change. However, the long-term use of such oil can cause irreversible damage to Peilin.Management of imported bearing antirust auxiliary materials from fag
The low whine or whine of NTN means that the stethoscope is not working normally.
The sharp chirp may be caused by improper lubrication, which causes metal friction, while the hissing sound may be the pollution of lubricating oil. The irregular noise is caused by the vibration caused by the indentation of the raceway. In the absence of an electronic stethoscope, the bicycle has a very simple method. Put a wooden stick on the front fork or rear fork and turn it.Management of imported bearing antirust auxiliary materials from fag
This method can also be used for the center axle, but it is difficult to judge because the sound of the center axle will be mixed with the rear axle. There are two kinds of lubricants commonly used in Koyo bearings: lubricating oil and grease. When the circumferential speed of the shaft is less than 4-5m / s, or the parts on the vehicle that cannot be lubricated with lubricating oil, they shall be lubricated with grease. Management of imported bearing antirust auxiliary materials from fag
The advantage of grease lubrication is that the sealing structure is simple, the grease is not easy to lose, and it is not affected by temperature. Adding grease once can be used for a long time.Management of imported bearing antirust auxiliary materials from fag
Two problems should be paid attention to when using grease. One is to select the appropriate brand of grease according to the requirements of the automobile manual. For example, nano base grease should not be selected for automobile water pump bearing because of its poor water resistance. The second is to add an appropriate amount of lubricating grease into the Koyo bearing. Management of imported bearing antirust auxiliary materials from fag
Generally, it is appropriate to fill only 1 / 2-L / 3 of the cavity of the Koyo bearing. Too much is not only useless, but also increases the running resistance of the Koyo bearing and heats it up. Special attention should be paid to the automobile hub bearing. It is necessary to advocate “empty hub lubrication”, that is, only apply an appropriate layer of grease on the Koyo bearing. Otherwise, it will not only waste and poor heat dissipation, but also overflow the grease by heating, which may affect the braking performance.Management of imported bearing antirust auxiliary materials from fag