The usage of some iron and steel enterprise bearing analysis

A 2019 - bearing iron and steel enterprise usage analysis 12 - 11 Dong Weiliang site condition: the enterprise has a 18 machine short stress bar production line, from March 2019 to May 2019 online accident has 17 is as follows: 1 # frame: 2 times, 2 # frame: 1, 6 # rack: 2 times, 9 # frame: 3 times, 10 # frame: 1, 13 # rack: # 1, 15 frame: 3 times, 17 # frame: 3 times, 18 # frame: 1. The 1 # frame belongs to bearing online time is too long cause; 6 # rack and 10 # frame damaged thrust bearing; 9 # next drive side the rest of the frame rack accident accidents have occurred in the roller drive side and are all lead to damage of main bearing. According to the scene to understand in April with occasional too low temperature steel cause blowout of face of the roll breakage or roller. Field observation a few on the roller bearing inner ring raceway has minor scratches; The scene found individual online running time short outside cylinder four row roller bearing inner ring friction marks circle is not closed. The above phenomenon in other bar line production units is not common. Cause analysis: 1, the use of the Great Wall brand molybdenum disulfide lithium grease no. 2, product quality is very good. Have online periodical filling lubricating oil demand. 2, watch bearing installation, individual bearing box aging, because there is no measurement can not judge the aging degree. The scene to watch the operation of the basic norms. Level 3, on-site measuring roll neck in line with the P6 interference national standard requirements. 4, in addition to the 1 # frame bearing online for too long, 6 # rack and 10 # frame bearing abnormal damage so far, the rest of the vehicles problems occurred on the drive side and roll, typical of regularity, thus boils down to the accident because of the roll system appeared on the transmission chain of a node is not coordination, should be determined as the main reason. Recommended measures: 1, see if universal shaft driving a smooth, Radial runout value is too large, impact Angle changed too much damage to the four columns of cylindrical bearing) 。 2, check the cardan shaft in the process of operation whether there is a rash move ( In the thrust bearing damage) 。 3, the diameter of the roll is used within the scope of the diameter of the design. 4, check to see if the error of bearing box holes used in allowed range. 5, install new bearing and bearing maintenance in accordance with the corresponding operation rules after logging off, roll when loading to avoid four row cylindrical bearing inner ring cylinder scratch. 6, appropriate to increase the number online running bearing the filling of lubricating oil. 7, in addition to the rolling steel should put an end to rolling steel at low temperature. （ Source: WeChat public 'rolling mill bearing)