How to solve the problem of roll shaft surface wear?

Rolls are the main working parts and tools on the mill to produce continuous plastic deformation of the metal, mainly by the roll body, roll neck and shaft head of three parts. Roll body is actually involved in rolling the metal of the middle part of the roll, it has a smooth cylindrical or with rolling groove surface. The roll neck is mounted in a bearing and transmits the rolling force to the frame through the bearing seat and the press-down device. The head of the drive end is connected to the gear housing through a connecting shaft, which transmits the rotating torque of the electric motor to the rolls. Rolls in the mill stand can be two-roll, three-roll, four-roll or multi-roll form of arrangement.
Mill rolls running in a long time in the low speed and heavy load environment, it is inevitable that there will be some problems, such as roll shaft surface wear.

An enterprise’s mill has been roll shaft surface wear problems, wear depth of 0.4mm. due to the low speed and heavy load operation characteristics of the roll, if it is welding machining repair, welding thermal stress will make the roll operation of the broken shaft problem, so many companies will use the replacement of new rolls to solve the problem of roll shaft surface wear. However, this method needs to be based on the downtime of the components, the stock situation and the value of the components, considering the replacement of the problem shaft, not only disassembly and installation time-consuming and laborious, but more importantly, the need to do a large number of inventory of spare parts, taking up a large amount of corporate capital flow. With the development of science and technology and the progress of technology, there are constantly some new materials and new technology emergence, greatly make up for the shortcomings of these traditional repair methods, such as Sole carbon nanopolymer material technology.

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