FAG bearing card injury analysis

FAG bearing card injury analysis:
Damage state: The so-called jam is a surface damage caused by a combination of minute burns generated on the sliding surface. The slide surface, the linear flaw in the circumferential direction of the rolling surface. Cycloidal flaws on the end of the roller. A jam on the collar face near the end face of the roller.
Cause: Excessive load, excessive preload.
       Poor lubrication.
       Foreign body bites like.
       The inner ring, the outer ring is inclined, the shaft, and the bearing box have poor precision.
Action: Check the size of the load.
       Preload should be appropriate.
       Improve lubricants and lubrication methods.
       Check the accuracy of the shaft and bearing housing.

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What is a stamped bearing

An external force is applied to a plate, a strip, a pipe, a profile, and the like by a punch and a die to cause plastic deformation or separation, thereby obtaining a forming process of a workpiece of a desired shape and size, and the obtained workpiece is a stamped part.
The stamping bearing is a forming method for applying a force to a plate, a strip, a pipe, a profile, and the like by a press and a mold to cause plastic deformation or separation to obtain a workpiece of a desired shape and size (a stamped bearing stamping). Stamping and forging are the same plastic processing (or pressure processing), collectively called forging. The stamped blanks are mainly hot rolled and cold rolled steel sheets and strips.
Of the world's steel, 60 to 70% are sheets, most of which are stamped into finished products. The body, chassis, fuel tank, radiator piece of the automobile, the steam drum of the boiler, the casing of the container, the iron core silicon steel piece of the electric motor and the electric appliance are all stamped and processed. There are also a large number of stamping parts in instruments, household appliances, bicycles, office machinery, living utensils and other products.
Compared with castings and forgings, stamping bearings are thin, uniform, light and strong. Stamping can produce workpieces with ribs, ribs, undulations or flanging that are difficult to manufacture by other methods to increase their rigidity. Thanks to the use of precision molds, the precision of the workpiece can reach micron level, and the repeatability is high and the specifications are the same. It is possible to punch out the holes and the bosses.
Stamped bearings are generally no longer machined or require only a small amount of machining. The accuracy and surface condition of hot stampings are lower than that of cold stampings, but they are still superior to castings and forgings, and the amount of cutting is small.
Stamping is an efficient production method. It adopts composite molds, especially multi-station progressive molds. It can complete multiple stamping processes on one press, and realize the whole process of unwinding, leveling and punching to forming and finishing. Automatic production. High production efficiency, good working conditions, low production costs, and generally can produce hundreds of pieces per minute.
Stamping is mainly classified according to the process, and can be divided into two major categories: separation process and forming process. The separation process is also referred to as blanking, and its purpose is to separate the stamped parts from the sheet along a certain contour line while ensuring the quality requirements of the separated sections. The purpose of the forming process is to plastically deform the sheet without breaking the blank to produce a workpiece of the desired shape and size. In actual production, it is often the case that multiple processes are integrated into one workpiece. Blanking, bending, shearing, drawing, bulging, spinning, and correction are several major stamping processes.
The surface and intrinsic properties of stamping sheets have a great influence on the quality of stamped products. The thickness of stamping materials is required to be precise and uniform. The surface is smooth, no spots, no flaws, no scratches, no surface cracks, etc.; yield strength is uniform, no obvious Directionality; high uniform elongation; low yield ratio; low work hardenability.

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