rolling mill defect ?
rolling mill defect ?
(OP)
hello,
does someaone have already make a diagnosis on rolling mill ?
does someaone have already make a diagnosis on rolling mill ?
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RE: rolling mill defect ?
cylinders, balls, hammers?
what kind of material?
cement chalk seeds?
luimont
RE: rolling mill defect ?
I am talking of a hot steel rolling mill.
with 7 stands with 4 cylinders (2 work rolls and 2 backup rolls per stand)
RE: rolling mill defect ?
C. Hugh
RE: rolling mill defect ?
I want to measure the 7 thrust bearings on a hot rolling (7 stands) for morgoil.
To you have some examples, i means photos.
Where could i put the sensor, the best way ?
RE: rolling mill defect ?
RE: rolling mill defect ?
You did not say why you are measuring the thrust bearing, but these machines are typically low speed except for stand #7. This raises many more issues. Are you comparing stands? (different speeds, different products = hard to compare).
Are you interested in product quality? motor condition? gearbox condition?
If you are measuring a thrust bearing on the gearbox, then I would use stud mounted acceleometers on the bearings. If you are in the clean area, magnet mounts will be sufficient. If spindle thrust is a problem and you are more interested in the slow speed stands (#1 to 4), proximity sensors may be better.
I could be a little more helpful if you let me know what the measurements are for?
Chris.
C. Hugh
RE: rolling mill defect ?
I want to measure the thrust bearing condition, it is for a rolling mill type morgoil. (all the 7 stands)
speed is ok upper than 60RPM stand 1 to 600RPM for stand 7
load : to have a constant load i want to take measurement
without load, it means without product
temperature is constant.
RE: rolling mill defect ?
If you can, I would compare the loaded versus unloaded thrust levels. To do so you will have to schedule measuremtns with a large run of similar product so that you can move from stand to stand.
There will still be an issue of the varying stand speeds. One method I used was synchronous time averaging using a shaft trigger before and after the gearbox. I then compared the levels for all the stands.
Good Luck
C. Hugh