Roller hearth heat treatment furnace is plate heat treatment production line in standard configuration, state of the furnace bottom roll is good or not will directly affect the appearance and quality of steel plate factory.In the production of furnace bottom roll roll breakage problems sometimes.Furnace bottom roll breakage roll reason is:

1) the processing qualityIn order to appearance quality and outer diameter size, processing plants in the joint turning processing will be carried out in general, the thickness of the turning from the conference lead to machining surface edge and journal of surface appear chamfering, pour Angle produced stress, high, when stress is too large, the roll breakage happens. 

2) litre coolingAnother roll and roll neck welding parts cooperate for clearance fit, the frequent rises cooled to accelerate the roll and roll neck weld cracks, eventually break.