Cause of Roll Breakage in Rolling Machine
Roll breakage occurs in rolling machine due to the catastrophic failure of rolling rolls. This can be caused by a few different factors. Here, three of the most common causes of roll breakage are analysed, along with advice on how to prevent it.
The first cause of roll breakage is excessive local stress. This happens when the loading on the roll increases beyond the level that the roll material can tolerate. Too much roll loading can be due to a number of factors, such as the wrong type of roll support being used, too much roll pressure, or a roll set-up that is too tight. To prevent this from happening, ensure the roll material is appropriate for the working pressure, and that the roll is supported correctly.
The second cause of roll breakage is fatigue failure. This is when the strength of the roll material decreases due to repeated exposure to cyclic loading. The fatigue failure of the roll can also be caused by prolonged exposure to heat or vibration, both of which weaken the material. To prevent this from happening, it is important to properly maintain the rolls and ensure that they are not being subjected to undue stress.
The third and final cause of roll breakages is material defect. This is when there is a flaw or defect in the material that makes it impossible to withstand the load it is put under. To prevent this from happening, careful inspection of the material before use is necessary. It is also important to use the correct amount of lubricant to ensure that the roll is functioning as intended.
Roll breakage can be a costly disruption, so it is important to be aware of the potential causes and to take the necessary steps to prevent it from happening. It is advisable to regularly inspect the rolls for any signs of wear and tear, and to ensure that lubrication and support are adequate. By following these simple steps, potential roll breakages can be minimised.
