Figure 2 shows the effect comparison before and after repair.
Before repairing
Figure 2: Comparison of the effects before and after repair
7 Case study
7.1 Background
The cold rolling mill workshop of a famous steel company bears the important responsibility of providing the roll bearing assembly for the cold rolling production line, which is directly related to the normal operation of each cold rolling production line. Since the rotating roller should be matched with the bearing, the quality of the bearing directly determines the stability of the roll and the rolled product. If the equipment fails to operate normally due to the failure of the bearing in the machine, the cold rolling mill and the subsequent production line are likely to stop. Down, resulting in unpredictable losses, so bearing reliability is critical.
The production line uses roller bearings mainly for four-row tapered roller bearings with a hole diameter of more than 350 mm, which belongs to the category of large-size bearings. Since the service life of the bearing is affected by the working conditions, the working condition of the rolling mill can be called “extremely bad†when rolling steel. Therefore, the bearing has a certain amount of replacement after inspection and maintenance every year, and the bearing replacement cost is nearly 10 million per year. Production costs also create very large pressures. However, due to concerns about the quality of the repaired bearings, the workshop did not dare to try to repair the bearings.
In mid-2006, the rolling mill work roll bearing in the production line found serious rolling body peeling in the daily cleaning and maintenance inspection, and could not be used again on the machine, but the supplier informed that the new order bearing delivery was delayed by 6 months, the production line The antegrade is facing threats. Considering various factors, the steel company decided to send four bearings to the Timken Bearing Repair Center.
Previous page next page
Pneumatic Vacuum Pump,Best Vacuum Pump,Oilless Vacuum Pump,Roots Vacuum Pump
Dongguan Beqile Mechanical&Electrical Equipment CO.,LTD , https://www.betemvacuum.com