Sink Roll for color coating line by Qingdao Hexin Machinery Co.,Ltd.
Method for alleviating local wear of sink rolls
During the use of sink rolls, due to various reasons, the roll pass pattern is often worn, cracks and various local wear, etc., which make the sink rolls invalid, which brings a lot of inconvenience to industrial production and reduces the use of sink rolls. Life and production efficiency, how can we reduce the local wear of sink rolls? The following will give you a detailed analysis of the reasons:
There are roughly three reasons for the failure of sink rolls in welded pipe production:
First, the improper adjustment of symmetry causes heavy wear of the roll pass;
Second, the poor heat treatment leads to cracks in the rolls and "dropping meat";
Third, the linear speed of the R pass is not equal to cause local wear of the edge and bottom diameter of the pass.
The first two are human factors, which can be solved through technical training and strengthening of heat treatment process management; while the third reason, which is caused by the welding pipe production process, has always plagued the welded pipe industry.
Although various efforts have been made to improve the material of the rolls and allocate the sizing amount reasonably, there has been little success so far, and this part accounts for more than 80% of the total number of failed sink rolls.
Therefore, how to reduce the local wear of sink rolls hole pattern and prolong its service life has become a top priority. According to the analysis, the so-called pass wear refers to the phenomenon that the material on the contact surface of the pass (the metal of the roll pass) is continuously lost due to the friction between the roll pass and the surface of the welded pipe during the production of the welded pipe. Therefore, as long as the welded pipe is produced, the wear of the pass pattern is inevitable, and the consequence of this is that the welded pipe appears "edge and corner" and the roll fails prematurely. Therefore, as long as the welded pipe is produced, the wear of the pass pattern is inevitable, and the consequence of this is that the welded pipe appears "edge and corner" and the roll fails prematurely.