After a couple hours of use (depending on thickness of material and length of rolling) my Turkish built plate roll starts to make a "grinding" noise, but only when rolling in a clockwise direction (from the operator's position). Thicker material formed to tighter diameters will cause the sound to start quicker than if I am rolling thinner material (ie. when the machine is under more stress). At first I will only hear the noise a little as I change to a clockwise direction in rolling, but it will increase over the next 10-15 minutes until it is a constant grinding noise whether the machine is under pressure or not. If I shut the machine down for the day and come back in the morning, all is fine again. This has been occurring for years and hasn't seemed to be getting any worse. My best guess is that the bearings may be heating up and expanding, thus causing them to grind, but that wouldn't explain why it is happening only when the rolls are turning in one direction.
I've tried to locate the source of the sound and even resorted to a mechanic's stethoscope, but the sound seems to emanate from the entire frame of the plate roll and it's impossible to pinpoint when I am under the plate roll looking for the source.
I've been a plate roll operator for 25 years and this is the only machine I have operated that has had this issue. I've posted a link to a short video I created to try and give you an idea of the sound. You don't really hear it until about the 35 second mark and even then only for a few seconds. I didn't have any more material to roll form after this piece to make the grinding sound more audible, so this is the best I have for now.
Dropbox - 20190503_143854.mp4 - Simplify your life
Any insight? Thoughts?
I have an upcoming project that will require the rolls to work properly for at least a full 8 hour day and I'm hoping someone may have experienced this in the past and can explain what is going on.
I've tried to locate the source of the sound and even resorted to a mechanic's stethoscope, but the sound seems to emanate from the entire frame of the plate roll and it's impossible to pinpoint when I am under the plate roll looking for the source.
I've been a plate roll operator for 25 years and this is the only machine I have operated that has had this issue. I've posted a link to a short video I created to try and give you an idea of the sound. You don't really hear it until about the 35 second mark and even then only for a few seconds. I didn't have any more material to roll form after this piece to make the grinding sound more audible, so this is the best I have for now.
Dropbox - 20190503_143854.mp4 - Simplify your life
Any insight? Thoughts?
I have an upcoming project that will require the rolls to work properly for at least a full 8 hour day and I'm hoping someone may have experienced this in the past and can explain what is going on.