The appearance of the rolling bearing can be checked under the astigmatic lamp. Since the appearance inspection items are mostly related to the accuracy of the bearing, the performance and the service life, so the inspection should be careful, do not think this is not important.
The following points are highlighted in the appearance inspection:
(1) Various cracks, such as cracks in raw materials, forging cracks, heat treatment cracks and grinding cracks, etc. These cracks will become stress concentration sources and rapidly expand during the subsequent bearing operation, causing bearing rupture, bearing life and work Security has a great impact. In fact, for important-use bearings, bearing factories have conducted 100% magnetic or ray inspection inspections of their constituent parts.
(2) A variety of mechanical flaws, such as abrasions, scratches, crushes, bumps, etc., can result in poor bearing installation, causing partial load and stress concentrations, resulting in reduced rotation accuracy and service life.
(3) Corrosion, black skin and pitting, the latter two are defects that easily store water and dirt, and are most likely to develop corrosion. Corrosion, on the other hand, is the cause of poor installation, early wear and fatigue. Severe corrosion can cause the bearing to be scrapped.
(4) from the skin and the fold, the two defects and the base metal part of the bond is not strong, and around there are often different degrees of decarbonization or carbon depletion, the material is easy to collapse, embossing or wear, bearing life and accuracy Very unfavorable.
(5) The riveting or welding quality of the cage mainly observes whether the rivet head is eccentric, skewed, slack, lacking of meat or “double eyelidsâ€, whether the welding position is correct, whether the welding spot is too large or too small, and whether the welding is not secure Or the phenomenon of stuck rolling elements caused by excessive welding, certain slopes of the cages, edges, whether the quality of the caulking and cutting is guaranteed, whether the rolling elements can not fall out of the cage and can turn freely, these points are not satisfactory Smaller ones result in lower bearing noise and rotation accuracy, while larger cages may occur, causing mechanical failure or accidents.
If any of the above inspections from (1) to (5) are found, the bearing will not be accepted. In addition, if the quality of typing is not good, such as writing is ambiguous or damaged, it should be considered as a defective product, and severe cases may not be accepted. In addition, the bearing assembly surface must not have visible burns (annealing traces).
The following points are highlighted in the appearance inspection:
(1) Various cracks, such as cracks in raw materials, forging cracks, heat treatment cracks and grinding cracks, etc. These cracks will become stress concentration sources and rapidly expand during the subsequent bearing operation, causing bearing rupture, bearing life and work Security has a great impact. In fact, for important-use bearings, bearing factories have conducted 100% magnetic or ray inspection inspections of their constituent parts.
(2) A variety of mechanical flaws, such as abrasions, scratches, crushes, bumps, etc., can result in poor bearing installation, causing partial load and stress concentrations, resulting in reduced rotation accuracy and service life.
(3) Corrosion, black skin and pitting, the latter two are defects that easily store water and dirt, and are most likely to develop corrosion. Corrosion, on the other hand, is the cause of poor installation, early wear and fatigue. Severe corrosion can cause the bearing to be scrapped.
(4) from the skin and the fold, the two defects and the base metal part of the bond is not strong, and around there are often different degrees of decarbonization or carbon depletion, the material is easy to collapse, embossing or wear, bearing life and accuracy Very unfavorable.
(5) The riveting or welding quality of the cage mainly observes whether the rivet head is eccentric, skewed, slack, lacking of meat or “double eyelidsâ€, whether the welding position is correct, whether the welding spot is too large or too small, and whether the welding is not secure Or the phenomenon of stuck rolling elements caused by excessive welding, certain slopes of the cages, edges, whether the quality of the caulking and cutting is guaranteed, whether the rolling elements can not fall out of the cage and can turn freely, these points are not satisfactory Smaller ones result in lower bearing noise and rotation accuracy, while larger cages may occur, causing mechanical failure or accidents.
If any of the above inspections from (1) to (5) are found, the bearing will not be accepted. In addition, if the quality of typing is not good, such as writing is ambiguous or damaged, it should be considered as a defective product, and severe cases may not be accepted. In addition, the bearing assembly surface must not have visible burns (annealing traces).
Diamond Wheels,Diamond Tool,Cbn Wheels
Fenghua Jade Motor Co., Ltd. , http://www.nscuttingdisc.com