Self-lubricating bearings visual inspection method

How to identify a product quality, the first is the view from the appearance.For precision products - self-lubricating bearing is no exception.How should the appearance test?Where is the focus of the test?Hengshun self-lubricating bearing engineer to explain one by one.
Self-lubricating bearing inspection to be carried out under astigmatism lamp, appearance of self-lubricating bearing, cracks and other parts for careful observation.
1, all kinds of machinery, such as abrasion, cut and bruised, crushed, can cause bad self-lubricating bearing installation, causing partial load and stress concentration, caused by rotation precision and service life.
2, rust, black and pitting, the latter two are easy to store water and dirt of defects, most likely to develop into rust.The corrosion is caused pollution sources, the installation of non-performing, early wear and fatigue of severe corrosion will make the self-lubricating bearing damaged.
3, all kinds of crack, crack, such as raw materials, forging, heat treatment of crack crack and grinding cracks, the crack in the process of self-lubricating bearings after operation, will become a source of stress concentration and expanded rapidly, causing self-lubricating bearing is broken, and the self lubricating bearing has enormous influence on the safety of life and work.In fact, for important use of self-lubricating bearings, self-lubricating bearing factory has been to 100% of their component parts magnetic or radiographic inspection.
4, peeling and folding, the two defects of local combined with matrix metal not firm, and its surroundings often exist in different degrees decarburization or poor phenomenon, carbon material easy caving, the indented or abrasion, the self-lubricating bearing life and accuracy very unfavorable.
5, maintains a riveting or welding quality, mainly to see whether it has offset the rivet head, skew, relaxation, lack of meat, or "double eyelid, correct the position of the welding, solder joint is too big or too small, for welding not firm or excessive cause jam phenomenon of roller.
Above several we check key check part of self-lubricating bearings, in addition to the part of the check, in addition, such as poor typing, such as blur, damaged, defective products should be think, severe cases may also not be acceptance.