Jinan engraving machine

      Rolling bearings are mass-produced mechanical parts, and the manufacturing precision is very strict, and the degree of specialization in technology is very high. Therefore, for most of the easy-to-buy bearing types, it should be more cost-effective to buy than in the following cases. Only consider the bearing repair problem, namely:       (1) A large number of bearings of the same type used in large factories are mainly in the form of wear on the rolling surface, fatigue or fretting abrasion, especially the damaged parts are mostly cages or rolling elements, and the ferrules or gaskets are still repaired. value;       (2) Large and extra large bearings , which have no major damage to the parts due to failure or failure, or valuable bearings must be managed to extend their useful life;       (3) Some types of bearings that are really difficult to purchase, have no spare parts after failure and have to be repaired,...

Causes and Prevention of Corrosion of Imported Bearings Corrosion of imported bearings is caused by various internal and external factors. The main ones are:     1, metal surface finish (oxygen concentration difference battery corrosion).     2. The chemical composition and structure of the metal material itself.     3. The composition of the solution and the pH value in contact with the metal surface;     4. Ambient temperature and humidity.     5. Various environmental media in contact with the metal surface.     6, other people's sweat is also the cause of bearing corrosion, its pH is 5 ~ 6. Therefore, in order to prevent rust caused by hand sweat, the installation and production personnel should wear gloves, do not touch the imported bearings by hand. Apply anti-rust oil to prevent skf bearing from rusting 1. Immersion method: Some small imported bearings are immersed in anti-rust grease. The thickness of the oil ...

Core Tip: The cause of rusting of the motor NSK bearing is very complicated. It may be that the bearing is not treated well, or it may be caused by moisture and rust caused by paint mist. Most electricity The cause of the rust of the motor NSK bearing is very complicated. It may be that the bearing is not treated well, or it may be caused by moisture and rust caused by paint mist. Most of the motor manufacturers use the insulating paint to volatilize the acid components mainly: four: unreacted low molecular paint raw material acid components (anhydrous and terephthalic acid, anhydrous maleic acid, trans Butylene diacid). 2 The acid component formed during curing of the paint (from formaldehyde to carboxylic acid, from formaldehyde to formic acid). 3 Lower fatty acids (formic acid, acetic acid) produced by thermal or oxidative decomposition. 4 The acid component of the cured product after water decomposition. The main acid component produced by the insulating varnish is formic acid, ...

Core Tip: How to easily clean textile sealed bearings and refueling methods. The introduction is as follows: The new cotton spinning equipment uses a large number of sealed bearings due to dust, heat and high speed requirements. These axes How to easily clean textile sealed bearings and refueling methods. The introduction is as follows: The new cotton spinning equipment uses a large number of sealed bearings due to dust, heat and high speed requirements. After a certain period of operation of these bearings, the bearings are dry and damaged due to lack of oil inside. For example, the imported air-sea spinning machine has a large number of sealed bearings, and the material is good. However, after several years of use, the grease can not be cleaned and replenished, which causes a large number of sealed bearings to be scrapped, which increases equipment failure and unnecessary expenses. Two simple and effective cleaning and refueling methods are introduced. The first type of sleeve cle...

    If the FAG bearing can be used correctly without the wrong choice, it can be used for a long time before the service life of the flat needle roller bearing. On the other hand, there is an accidental early damage, and the early damage that cannot be used is used as the The causes of early damage are not enough to consider the use of lubrication, and there are also foreign matter intrusion, the error of bearing assembly and the deflection of the shaft are large, and the research on the shaft and the bearing housing is insufficient. It can be said that these reasons overlap each other.     A comparative study using various mechanical design lifes and various durable bearing limits, while determining the FAG bearing size. In the selection of FAG bearings, flat needle bearings tend to be considered, the grease life in aging, the fatigue life of the grease, wear resistance, and low noise, also need to be fully studied.     When the FAG bearing ring rotates...

The function of the double row deep groove ball bearing is to make the stationary ring and the rotating ring of the NSK bearing are respectively fixed with the stationary part (usually the bearing seat) and the rotating part (usually the shaft) of the mounting part, thereby realizing the rotating state. The underlying load transfer and the basic task of defining the position of the motion system relative to the stationary system. On the shaft and in the housing, NSK bearings require their position to be fixed in three directions: radial, axial and tangential. The radial and tangential positioning is achieved by the tight fit of the double row deep groove ball bearing ring. The axial positioning is only used in a few cases; the axial limit parts, such as the end cover and the retaining ring, are generally used. The axial position is limited to the range of the play. The double-row deep groove ball bearing prevents the adhesion and boundary lubrication when the shaft diameter is in di...

INA bearings must be installed in a dry, clean environment. Care should be taken to check the mating surfaces of the shaft and the housing, the end faces of the shoulders, the grooves and the joining surface before installation. All mating joint surfaces must be carefully cleaned and burred removed, and the unmachined surface of the casting must be cleaned of sand. 1. After the bearing is installed, the rotation test should be carried out. Firstly, it should be used for the rotating shaft or the bearing box. If there is no abnormality, the power will be run without load and at low speed. Then, according to the running condition, the rotation speed and load will be gradually increased, and the noise, vibration and temperature rise will be detected. If an abnormality is found, it should be stopped and checked. It can be delivered after the operation test is normal. The lubricating base filled in the INA bearing configuration will gradually lose its lubricating properties. Therefore, w...

Whether INA bearings can continue to be used is the degree of damage according to various needs, and the main consideration in this regard is the effect of damage. For mechanical performance, importance, installation conditions are considered, to the next time. The effect determined during the inspection period, but in the case where the defect cannot be used, it is necessary to replace the new electric spindle bearing. For the inner ring, the outer ring, the rolling element, and the cage, there is a crack in the crack. Note that this is also an effect that is maintained in this regard. After the INA bearing is subjected to a load, plastic deformation occurs at the contact between the rolling element and the raceway. When the load is too heavy, plastic deformation pits will be formed on the surface of the raceway, and the electric spindle bearing will generate vibration and noise during operation. Due to the relative movement of the rolling elements and the raceways and the intrusio...

Often affecting the noise of the entire machine, reducing the sound of the raceway can reduce the noise of the entire machine.     Impact sound of rolling element and its control method When a larger type of ball NSK bearing or cylindrical roller bearing runs at low speed under pure radial load, the rolling element in the non-loading area will be impact-maintained due to the small centrifugal force of the rolling element. Noise caused by racks or raceways. But as the speed increases, the sound will disappear. The control methods for the impact sound of the rolling element are: appropriately reducing the radial clearance, and using the NSK bearing with a reasonable structure and a flexible material.    The rolling noise of NSK bearing and its control method The rolling sound is the harsh metal friction sound of cylindrical roller bearing which can occur in all occasions. Most of them occur in the grease-lubricated NSK bearing, but the base oil performance deteriora...

      The so-called INA bearing burn injury state means that the INA bearing's race wheel, rolling element and cage are heated rapidly during rotation until discoloration, softening, welding and damage. The main cause of burns in INA bearings is the poor lubrication of INA bearings, the possibility of using irregular lubricants, or too many lubricants, too few, are incorrect. For information on INA bearing lubrication, please refer to the introduction of the two articles "The Misunderstanding of Lubricating Grease in Repairing FAGINA Bearings" and "Introduction to Lubrication Technology in INA Bearings". Secondly, it may be an excessive load (preload is too large). The speed is too high. The play is too small. There is water or other foreign matter invading. If the above two cases are not the case, the accuracy of the shaft, the INA bearing housing is poor, and the deflection of the shaft is large. Seeing this, I think everyone wants to know the solution. Fir...

The service life and reliability of rolling bearings are closely related to the quality of the steel used for bearing. Due to the characteristics of bearing steel, the quality of smelting is much stricter than that of general industrial steel, such as the chemical composition, purity, organization and uniformity of steel.       Strict chemical composition requirements       Generally, the steel for bearing is mainly high carbon chromium bearing steel, that is, hypereutectoid steel containing about 1% of carbon, adding about 1.5% of chromium, and containing a small amount of manganese and silicon. Chromium can improve heat treatment performance, improve hardenability, microstructure uniformity, tempering stability, and improve the rust resistance and grinding performance of steel. However, when the chromium content exceeds 1.65%, the retained austenite in the steel is increased after quenching, the hardness and dimensional stability are lowered, the carbi...

   Improper disassembly of the shaker bearing may result in damage inside the bearing. Contaminants may enter the bearing or may cause errors when reinstalled. Therefore, the vibration of the vibrating screen bearing must be very careful, the shaft must have proper support, otherwise the disassembly force may damage the bearing.     1. Peripheral disassembly     Disassemble the outer ring of the interference fit, and set several outer ring extrusion screw screws on the circumference of the outer casing in advance, and tighten the screw equally on one side. Disassembled on one side. These screw holes are usually covered with a blind plug, a split-type bearing such as a vibrating screen tapered roller bearing, and a plurality of slits are provided on the outer shoulder of the outer casing, and the spacer is used, disassembled by a press, or gently tapped and disassembled.    2. Disassembly of the vibrating screen cylindrical bore bearing ...

Deep groove ball bearings , angular contact ball bearings, four-point contact ball bearings, self-aligning ball bearings, tapered roller bearings, cylindrical roller bearings, spherical roller bearings, these types of bearings are all over, the use is common, the model How many kinds of tens of thousands of species, let us briefly introduce the construction of these types of bearings, advantages and limitations of the use of the industry. Deep groove ball bearing The most representative rolling bearing is of common use. Radial load and bidirectional axial load are acceptable. It is used in places where high-speed torsion and low noise and low vibration are required. Sealed bearings with steel dust caps or rubber seals are pre-filled with excess smooth grease and bearings with snap rings or flanges on the outer ring for easy axial positioning and for easy installation in the housing. The size of the maximum load bearing is the same as that of the standard bearing, but there is a fill...

Grease has many advantages in bearing use, but it also has the following disadvantages: (1) The grease is semi-solid and does not flow at normal temperature, so it is difficult to grease or change the grease on the friction parts, and the cleaning of the bearings is not very convenient. (2) It is difficult to separate moisture, dust, and abrasive debris. In the case of lubricating oil, the impurities generally sink to the lower part or are easily removed by the oil filter. (3) The stirring resistance is large, so the heat generation is large and the cooling effect is poor. However, it should be noted here that this has a close relationship with the lubrication method. If the lubricating oil is lubricated with a fully immersed (or semi-immersed) oil bath, the grease will consume less power than the oil. For example, the British Journal of Friction and Lubrication reported in 1973, 6th issue: With a rolling bearing with a diameter of 100, the rotational speed is 1500r/min, and it is ...

Common quality defects of bearing parts after heat treatment include: quenching microstructure overheating, underheating, quenching cracks, insufficient hardness, heat treatment deformation, surface decarburization, soft spots, etc.       Overheat     Overheating of the microstructure after quenching can be observed from the rough mouth of the bearing part. However, the exact microstructure must be observed to determine the degree of overheating. If coarse needle-shaped martensite appears in the quenched structure of GCr15 steel, it is quenched and superheated. The formation may be caused by excessive overheating of the quenching heating temperature or excessive heating and holding time; or it may be due to the serious banding of the original structure, forming a local martensite needle-like coarseness in the low carbon zone between the two zones. Local overheating caused. The retained austenite increases in the superheated structure, and the dimensional st...

The reasons for the failure of imported bearings are often multi-factorial. The influencing factors of all design and manufacturing processes will be related to the failure of imported bearings, and it is difficult to judge by analysis. In general, it can be considered and analyzed in terms of both usage factors and internal factors.     The use factors mainly refer to whether the installation adjustment, use and maintenance, maintenance and repair, etc. meet the technical requirements. The installation condition is one of the primary factors in the use factor. The imported bearing is often changed due to improper installation, and the force state between the parts of the whole bearing changes, and the bearing runs in an abnormal state and fails early. According to the technical requirements for the installation, use, maintenance and maintenance of imported bearings, monitor and check the load, speed, working temperature, vibration, noise and lubrication conditions of the b...