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Date:2015-05-15

The basic structure of rolling bearings
    With sliding bearings developed on the basis of the rolling bearing, its working principle is based on rolling friction instead of sliding friction, usually by two rings, a set of rolling elements and a cage consisting of very versatile, standardization, serialization of very high machine parts. A variety of machinery have different working conditions, the load on the bearing capacity, structures and other aspects of performance have raised a variety of different requirements. To this end, the need for a wide Ball Bearing range of rolling bearing structure. However, the basic structure is from the inner ring, outer ring, rolling elements and cage formed.
    Various parts in the bearing of the role are:
    For radial bearings, inner ring and the shaft is usually tight co-operation together with the shaft, usually with the bearing outer ring or shell hole into the transition with the machine, from the supporting role. However, in some cases, there are outer operation, from the supporting role of the fixed inner ring or inner ring, outer ring are also functioning. For thrust bearings, and shaft tight and together with the axis of movement of said ring, and the bearing or mechanical shell hole and into the transition from the supporting role with said seat. Rolling elements (ball, roller or needle) through the bearing cage is usually arranged evenly between the two rings for the rolling motion, its shape, size and number of direct impact on the load bearing capacity and performance. In addition to rolling element cage can uniformly separated outside, but also from the guide roller bearings rotating internal lubrication and improve performance and so on.
    Section II Classification of rolling bearings
    1. Bearing structure according to the type of classification
    (1) can bear the load bearing direction according to the nominal contact angle or different, are divided into:
    1) radial bearings ---- mainly used to bear radial load bearing, the nominal contact angle from 0 to 45. At different nominal contact angle, is divided into: radial contact bearings ---- nominal contact angle of 0 radial bearings: radial angular contact bearings ---- nominal contact angle greater than 0 to 45 radial bearings.
    2) ---- thrust bearing is mainly used for axial load bearing, the nominal contact angle greater than 45 to 90. According to the nominal contact angle is divided into different: axial contact bearings ---- nominal contact angle of the thrust bearing 90: Axial angular contact bearings ---- nominal contact angle greater than 45 but less than 90 of the thrust bearing.
     (2) The rolling bearing according to the type, divided into:
    1) The ball is rolling ball bearings ----:
    2) ---- rolling roller bearings for the roller. Roller bearings by roller types, is divided into: ---- cylindrical roller bearings are cylindrical roller roller bearings, cylindrical roller length and diameter ratio less than or equal to 3; Needle Roller Bearings --- - is a needle roller bearings, needle length and diameter greater than 3, but the diameter is less than or equal to 5mm; tapered roller bearings ---- rolling body is tapered roller bearings; self-aligning roller rolling bearing eleven are spherical roller bearings.
     (3) bearing aligning their work can be divided into:
    1) Spherical roller bearings ---- is spherical, and can adapt to the two roller angular deviation between the axis line and the angular motion of the bearing;
    2) non-self-aligning bearing (rigid roller bearing )---- can impedance offset angle between the axis of the bearing.
     (4) The rolling bearing according to the number of columns, divided into:
    1) with a single row bearings ---- roller bearings;
    2) Double row bearings ---- with two roller bearings;
    3) multi-row bearings ---- with more than two roller bearings, such as three, four bearings.
    (5) bearing its separate parts can be divided into:
    1) separable bearings ---- with detachable parts of bearings;
    2) can not be separated in the final package bearing ---- bearings, the ring can not be separated from any free bearings.
    (6) bearing structure according to their shape (if no slot loading, with or without inner and outer rings and the ring shape, wall structure, even without the cage, etc.) can also be divided into a variety of structural types.

Classification of rolling bearings by its outside diameter size size, divided into:
    (1) miniature bearings ---- nominal diameter size range of 26mm below the bearings;
    (2) small bearings ---- nominal diameter size range of 28-55mm bearings;
    (3) small and medium size bearings ---- nominal diameter range of 60-115mm bearings;
    (4) large bearings ---- nominal diameter size range of 120-190mm bearing
    (5) large bearings ---- nominal diameter size range of 200-430mm bearings;
    (6) large bearings ---- nominal diameter size range of 440mm above the bearing.
    Section III the basic production process of rolling bearings
    As the rolling bearing type, structure type, tolerance level, technical requirements, materials and quantities of the different, the basic production process is not exactly the same.
    A variety of bearing the main parts of the process:
    1. Processing of rings: inner and outer bearing raw materials or processing according to the form of rough vary, including car before processing can be divided into the following three processes, the whole process is: bar or tube material (subject to some bar forging and annealing, normalizing heat treatment )---- vehicle processing ---- ---- ---- grinding parts lapping or polishing the final inspection ---- ---- Rust ---- ----( be combined package with storage>
    2. Processing of steel ball, steel ball raw materials by processing the same state vary, cut or ball of light which fell before the process can be divided into the following three, before heat-treatment process can be divided into the following two, the whole process is: red bar or wire cold (cold red bar after some needed punch ring and annealing )---- setback cut, coarse, soft grinding or ball of light ---- Heat Treatment - Hard grinding mill ---- --- ---- ---- lapping or polishing the final inspection group ---- rust, packaging ---- storage <set to be combined with>.
    3. Process roller roller processing of raw materials vary according to different pre-heat treatment process which can be divided into the following two, the whole process is: bar-turning or cold heading wire and Polishing after the string ring string of soft-point heat ---- ---- ---- ---- OD roughing roughing end mill end end ---- ---- ---- fine grinding diameter diameter end mill ---- groups ---- rust final inspection, packaging ---- storage (to be set together with>.
    4. Processing of cage cage design process according to the different structures and materials can be divided into the following categories:
    (1) ¡ú cutting ¡ú punching sheet metal stamping ¡ú ¡ú ¡ú shaping and finishing of light pickling or shot blasting or strings rust ¡ú ¡ú final inspection, packaging ¡ú warehousing (to be combined with packages)
    (2) the processing of solid cage: the processing of solid cage, depending on raw materials or a bad hair vary, including car before processing can be divided into the following four types of rough, the whole process are: bar, pipe material, forgings, castings ---- cars diameter, outside diameter, face, chamfer ---- drilling (or broaching, boring final inspection )---- ---- ---- pickling anti-rust, packing ---- storage <set to be combined with>.
    Second, the rolling bearing assembly process:
    Bearing parts such as the inner ring, outer ring, rolling elements and cage, etc., have passed the test after the assembly into the assembly plant, the process is as follows:
Parts demagnetization, cleaning ¡ú inside and outside the roll <channel> Road size grouping together sets of sorting ¡ú ¡ú ¡ú clearance inspection riveting seized Cage ¡ú end ¡ú demagnetization, cleaning rust ¡ú packaging ¡ú into finished products (packing, shipping >.
    IV characteristics of rolling bearings
    Rolling and sliding bearings, has the following advantages:
    1. Rolling friction coefficient smaller than the sliding bearing, high transmission efficiency. General sliding friction coefficient Mini ball bearings of 0.08-0.12 bearings, and bearing friction coefficient of 0.001-0.005;
    2. Bearing has been achieved standardization, serialization, generic, suitable for mass production and supply, use and maintenance is very convenient;
    3. Rolling bearings for steel manufacturing, and after heat treatment, therefore, bearing not only has high mechanical performance and long service life, but it will save manufacturing plain bearings are used in more expensive non-ferrous metals

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