Production of the rolling element of the rolling bearing (1)

Source: China Bearing Network Time: 2013-04-20

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The rolling elements of the rolling bearing are mainly steel balls and rollers. Their processing progress is as follows:
1. The processing process of the steel ball, the processing of the steel ball is different depending on the condition of the raw material, and the process before the frustration or the photosphere can be divided into the following three types, the process before the heat treatment, and can be divided into The following two processes; the whole processing process is: bar or wire cold-punching (some bars need to be punched and annealed after cold-shrinking)----frustration, rough grinding, soft grinding or light ball---- Heat treatment----hard grinding----fine grinding----finishing or grinding----final inspection group----rust prevention, packaging----into the warehouse to be installed.
2. Roller processing The processing of the roller varies depending on the raw material. The process before the heat treatment can be divided into the following two types. The whole processing process is as follows: bar processing or wire cold rolling after the string And soft grinding----heat treatment----string soft point----rough grinding outer diameter----rough grinding end face----finishing end face----fine grinding outer diameter----final grinding Outer Diameter----Final Inspection Group----Anti-rust, packaging----into the warehouse (to be installed).
Common sense of rolling bearings The basic layout of the first section of the rolling bearing is a rolling bearing developed with the sliding bearing as the base; the working principle is to replace the sliding friction with the rolling friction; generally consists of two ferrules; a set of rolling elements and a cage The mechanical roots of the composition are very versatile, standardized, and highly serialized. Because various machines have different working conditions; the rolling bearings are different in terms of load capacity, layout and function. Demand. To this end; the rolling bearing needs to have a general layout. However, the most basic layout consists of the inner ring, the outer ring, the rolling body and the cage.
The effects of various parts in the bearing are:
About the radial bearing; the inner ring generally cooperates with the shaft; and works with the shaft; the outer ring generally cooperates with the bearing seat or the mechanical housing hole; the support effect. However; in some cases; there are also outer ring operations The inner ring is fixed to support the effect or the inner ring and the outer ring are all working together. About the thrust bearing; the shaft ring which cooperates with the shaft and moves together; and the bearing seat or the mechanical housing hole cooperates with each other and supports the effect The seat ring. The rolling body (steel ball, roller or needle roller) is generally placed between the two ferrules in the bearing for rolling movement; its shape, size and quantity directly affect the load of the bearing. And the use of functions. The cage can not evenly separate the roll body from the gap; it can also guide the rotation of the roll body and improve the smooth function inside the bearing.
The second section of the rolling bearing classification 1. Classified according to the type of roll bearing layout (1) Bearings are different according to their acceptable load direction or nominal touch angle;
1) Radial bearing----first for rolling bearings with radial load; its nominal touch angle is from 0 to 45. It is different according to the nominal touch angle; it is divided into: radial touch bearing----nominal touch Radial bearing with angle 0: centripetal angle touch bearing----central bearing with nominal touch angle greater than 0 to 45.
2) Thrust bearing----first for rolling bearings that accept axial load; its nominal touch angle is greater than 45 to 90. According to the nominal touch angle, it is divided into: Axial touch bearing----Nominal touch angle is Thrust bearing of 90: thrust angle touch bearing----the thrust bearing with a nominal touch angle greater than 45 but less than 90.
(2) Bearings according to the type of their roll; divided into:
1) Ball bearing----roller is ball:
2) Roller bearing----roller is roller. Roller bearing is made of roller; it is divided into: Cylindrical roller bearing----roller is the bearing of cylindrical roller; the length of cylindrical roller The ratio of the diameter is less than or equal to 3, the needle bearing----roller is the needle bearing; the ratio of the length to the diameter of the needle is greater than 3; but the diameter is less than or equal to 5mm; tapered roller bearing----rolling The body is a tapered roller bearing; the spherical roller bearing one by one rolling body is a spherical roller bearing.
(3) Bearings can be adjusted according to their operation, and are divided into:
1) Self-aligning bearing----the raceway is a spherical shape, which can be used to the angular error and angular movement between the two raceways.
2) Non-aligning bearings (rigid bearings)----bearings that can offset the axial angle between the raceways.
(4) Bearings are divided into:
1) Single row bearings----bearings with one row of rolling bodies;
2) Double row bearings----bearings with two rows of rolling bodies;
3) Multi-row bearings----bearings with more than two rows of rolling elements, such as three-row and four-row bearings.
(5) Bearings can be separated according to their components, divided into:
1) Can be separated from the bearing----with bearings that can be separated from the parts,
2) Do not leave the bearing ---- After the bearing is matched at the end, the ferrule can not be free from the bearing.
(6) Bearings can be divided into various layout types according to their layout shape (if there is no filling groove, whether there are inner and outer rings and the shape of the ferrule, the layout of the ribs, or even the cage).
2. According to the scale of the rolling bearing, the bearing is classified according to its outer diameter scale.
(1) Miniature bearings----bearings with a nominal outer diameter scale of 26 mm or less;
(2) Small bearings----bearings with a nominal outer diameter scale of 28-55mm;
(3) Small and medium-sized bearings----bearings with a nominal outer diameter scale of 60-115mm;
(4) Medium and large-sized bearings----bearings with a nominal outer diameter scale of 120-190mm (5) Large bearings----bearings with a nominal outer diameter scale of 200-430mm;
(6) Extra large bearings----bearings with a nominal outer diameter scale of 440mm or more.

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