KOYO import bearings when installation work point method to avoid failure

( 1) Work together as much as possible through KOYO bearing axis, which requires the screws even symmetry and smooth, by spherical or parallel to the axis force application. ( 2) Wire should be smooth and uniform, the size of the unfavorable impact, this request can use hydraulic or use steady pull or pressure tool, it had to use hammer, also want to through soft without exfoliation metals such as copper sleeve to buffer, tapping force as gently as possible. It is best to use copper or copper hammer hammer. ( 3) Avoid by applying pressure roller, which requires the inner ring (installation Axial circle) When applying pressure through the inner ring and outer ring installation) Through the outer power works. ( 4) The extent of the drag force continued to be, for example, when installing a imported bearing in the bearing fit into the correct position to stop work, guarantee the ring ( Washers) The end face of landing on a hole or shaft shoulder end, neither packed too tight, nor does not reach the designated position. To scanning electron microscopy at high magnification observation of fracture site, find its characteristics are the following: (1) magnification observation, micro area appears many fan pattern morphology. (3) fan pattern shape is different, different point of view observes the fan pattern is formed different plane crack connection. Observed under high crack extension area, found that the typical fatigue crack; Low-power scan of crack source, can be found that the beach pattern around the crack source, the source of crack area distribution, there is a lot of corrosion pit some corrosion pits connection into line, mud shaped pattern morphology. (4) to accept the highest stress, for water jacket with contact point of the cylinder liner hot muscle. A and B stress is small. Bearing water work stress, assembling stress and thermal stress mainly accept bums three types of stress. Water set of hoop stress for the maximum stress, its value is about 128 mpa is oil-bearing assemblage is a kind of random anomaly, abnormal flames burn artifact defects often seriously affect the appearance quality of workpiece and product performance, even cause unqualified failure scrapped, especially on appearance quality requirements of high precision workpiece or important workpiece surface. (5) in the production of observation found that induction heating, artifacts and light sensor happen often isn't a point contact, bearing noise generated by the very sensitive. So, in order to adhere to KOYO import bearings running smooth, generally USES the high reliability of sintered bronze oil-retaining bearing, but also to take some measures, such as proper control of sintering conditions, make the organization of the alloy is single phase, and can be used anticorrosion technology measures; Another way is to make the compressive stress in the appearance of components, to offset the water jacket in service under tensile stress. We can find that the bearing water jacket with cylinder liner, A place for the water jacket with contact point of the cylinder liner hot muscle, the highest stress, less stress at A and B. KOYO import bearing water in main combustion under stress, assembling stress and thermal stress of three kinds of stress. Water set of hoop stress for the maximum stress, its value is about 128 mpa, water jacket inside the maximum stress of about 98 mpa.