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Overview and common types of crossed bearing cylindrical roller
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Release time:
2021-02-03
Before the forming of precision Cylindrical roller, except that the fillet area of the small end of the roller and a part of the column center are subject to three-dimensional compressive stress, most of them are basically subject to one-dimensional compressive stress field and two-dimensional tensile stress field. The closer to the large end of the Cylindrical roller, the larger the tensile stress field is, and the tensile stress field will lead to intergranular deformation of the metal composite and reduce the plastic deformation of the metal composite. Therefore, when the design of blank or mold specifications and models is unreasonable, the raw materials are poor, and the manufacturing process is improper, the Cylindrical roller of rolling bearing generally causes cracking at the fillet of the big end.
In addition, the friction between the blank and the die in the precision Cylindrical roller, the uneven internal structure of the raw material and the unreasonable specification of the die will also lead to the additional stress field in the Cylindrical roller of the rolling bearing, reduce the plastic deformation of the metal composite, improve the deformation immunity of the metal composite, and cause the thermal stress in the roller of the precision cross bearing.
The additional stress field will lead to the change of specifications, models and patterns of precision Cylindrical roller, and reduce the performance index, especially in the additional stress field caused by external friction, which is not good for the quality and processing technology of roller bearing. It mainly causes the axial region of the small end fillet of Cylindrical roller, which reduces the internal and external quality of the fillet of Cylindrical roller, and improves the die quality Damage and reduce die life. The important factors of damaging friction are the characteristics of raw materials, the pattern of stamping die, the service performance and the expected effect of lubrication.
If we fully grasp the load force of precision Cylindrical roller, then we can buy better quality rolling bearing products. Considering the requirements of industrial equipment application, if the load is not up to standard, it will have a great impact on the use of rolling bearing needles in the second half of the period. It can be seen that the quality of rolling bearing needle is related to the operation of mechanical equipment. Good precision Cylindrical roller can make full use of its function, make the transmission device of mechanical equipment smooth, improve work efficiency, also can effectively reduce the friction between each part, improve the service life of mechanical equipment.
Cylindrical roller is the most common one, it can not only be used in cylindrical roller bearings, but also can be directly used in mechanical roller components. As the size of the roller has been standardized, it can be used as a product roller for design and user selection.
It is slightly different from long cylindrical roller. It can also be subdivided into shaft diameter and non shaft diameter. Both can be used in long cylindrical roller bearings, and roller components can also be directly used in machinery. Needle roller is also a kind of roller, which is a part of needle roller bearing, general needle roller bearing and thrust needle roller bearing. Of course, it can also be used as a mechanical part.
There is also a tapered roller with a tapered cone shape. The cone angle is usually 1 ° to 4 ° 20 ', and is also less than 1 ° or greater than 4 ° 20', but most of them are 2 °. The length of the roller is usually not more than twice the diameter of the big end of the roller. It is more used in tapered roller bearings, in which the rollers with large taper angle are basically used in thrust tapered roller bearings.
Cylindrical,roller
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