Hot grinding process service : Salient feature

It is a service to provide hot grinding finishing of roll under the same temperature condition of steel plant manufacturing site of roll in use. Roll utilization condition in steel plant and paper making industry which should be exposed directly to radiant heat released from molten metal and high temperature vapor, differs very much from that of ordinary processing job site. Consequently, the satisfactory accuracy (Inspection and measurement), obtained in the normal finishing processing condition, may vary delicately when brought into production site affected by metal expansion. The hot grinding processing of roll of Nomura Plating can reserve the high accuracy when used in the actual manufacturing site by the result of the effort to reproduce the identical conditions of actual manufacturing roll as much as possible. Nomura Plating can meet with the large-size machining up-to φ1,400 and L8,000. The Company is furnished with large size processing facility and equipment in weight-wise as well, so it can meet with the subject weighted 35,000kg.

Hot grinding process service : Salient feature-2

As for the temperature condition of hot grinding, Nomura Plating can meet with widely the temperature condition of production site of customer up-to 250℃ of heated oil and 200℃ of hot water. Generally speaking, iron material varies its dimension 0.0117mm per meter according to 1℃ temperature change. This is being of the iron expansion coefficient is 11.7, it can be foreseen the change by filling the following equation;
Formula △Ｌ=L x heat expansion x coefficient x T ( △L: Length △T:Temperature change)
It is recognized that the hot grinding is definitely essential to industrial roll in order to maintain the accuracy in the production site, since the large size of industrial roll of over φ1,000 and length of over 5,000.are not rare.