The basic process of rolling bearings

Process of rolling bearings in generally can be divided into the main components of the machining process and assembly process. Among them, the main parts is only the bearing of the four elements ( Outer ring, inner ring and ball and cage) 。 In many bearing company, in order to reduce the production cost, improve the company's benefits, not all of the bearing parts are produced by themselves. For example the grace of my internship, bearing co. , LTD. , their bearing products, especially for high military products. Company main processing outer ring and inner ring and ball and cage from outside factory to buy finished product, and then are assembled. So in the following main parts processing process, familiar with machining process of ring, is introduced in detail, for steel ball and cage in a production process. In the process of internship, I learned that in the actual production and assembly process, a batch of the same type of bearing with a process product flow card. Transfer all processing procedures are printed on the card products. When the bearing in the process of car, this flow card is in the hands of a lathe technical workers, when he finished the process, he is on the card corresponding sign his name on the form, it represents the products he processing, and if the product has quality problem, he is to blame. Then the flow card will go together with the bearing to the hands of workers in the next procedure. I think this card system is very good, this not only can easily see it every working procedure, and, when problem of product occurrence quality, can be found in the first place, processors, let him to rework or responsible. The major parts of the process, as a result of the rolling bearing type, structural type and tolerance grade, technical requirements, material and batch is different, the basic production process is not entirely the same. Ring ring processing: processing of bearing inner ring and outer ring processing varies according to the difference of the raw materials or blank form, the whole process is: the bar stock or tube ( Some bar need to the forging, annealing and normalizing) - Car processing - Heat treatment - Grinding - Final inspection - lapping or polishing parts Rust - Warehousing - - - ( For sets of assembly) Ring we can see from the flow card, for inspection of the basic behind each working procedure have inspectors this item, this is the quality assurance department inspector's work. When I worked as an intern in quality department, a former inspector's work. I learn about some basic test bearing instruments and methods. Rolling bearing assembly process and characteristics of rolling bearing parts such as inner ring and outer ring, rolling elements and cage, after inspection, are assembled into the assembly workshop, the process is as follows: part demagnetization, cleaning, internal and external roll < channel> way size group choose don't - and set to check the clearance, riveting cage - final inspection - demagnetization, cleaning and antirust, packaging and shipping department ( Packing and delivery>. Rolling bearing small friction coefficient than sliding bearing, high transmission efficiency. The friction coefficient of sliding bearing is 0. 08 - 0. 12 and the friction coefficient of rolling bearings is only 0. 001 - 0. 005; Rolling bearing is standardization, seriation, generalization, suitable for mass production and supply, use and maintenance is very convenient. Rolling bearing made of bearing steel, and after heat treatment, therefore, the rolling bearing not only has high mechanical performance and longer service life, and can save make prices more expensive nonferrous metals used in the sliding bearing; Rolling bearing internal clearance is small, the processing precision of parts is higher, therefore, high precision. At the same time, can be made by the method of additive load bearing rigidity increase. This is very important for precision machinery; Some of the rolling bearing can bear radial load and axial load at the same time, therefore, can simplify the structure of the bearing pedestal; Because of the rolling bearing high transmission efficiency, less calorific value, therefore, can reduce consumption of lubricating oil, lubricating maintenance more convenient; Rolling bearing can be easily applied to uranium in any direction. Rolling bearing load capacity is much less than the same volume of sliding bearing, therefore, radial size of rolling bearings. So, under heavy load situations and demands radial size, structure compact occasions (such as internal combustion engine crankshaft bearing) , use sliding bearing more; Particularly sensitive to scrap metal and other foreign bodies, rolling bearings bearings once in foreign body, can produce bigger vibration and noise in an intermittent, also can cause early damage. In addition, the rolling bearing due to metal inclusions, etc. Also the possibility of early damage of the easy happening. Even if you don't happen early damage, the service life of rolling bearing also has certain limits. In a word, the life of the rolling bearing is the shorter of the sliding bearing. Rolling bearing compared with sliding bearing, however, each have advantages and disadvantages, each has certain applicable occasions, therefore, they cannot fully replace each other, and to a certain direction, expand their areas. However, due to the prominent advantages of rolling bearings, there is quite a competitor. Today, the development of rolling bearing has become the main mechanical bearing type, more and more widely applied.