Field repairing method of welding cracks of feeding slip-ring body of large-sized slide mill

Abstract

The invention provides a field repairing method of welding cracks of a feeding slip-ring body of a large-sized slide mill, wherein a field detection step comprises the following steps of coloring, detecting defects, drilling crack arrest holes and cleaning and polishing a surface; a repairing welding step comprises reinforcing plate repairing welding, repairing welding method and defect re-detection; in a machine processing step, a supporting frame arranged near a feeding slip-ring body is used for installing a turning machine for grinding and processing the surface of the maximum outside diameter of a slip ring; and finally, the field repairing is achieved by replacing a new bearing bush and commissioning and inspecting a cylinder body. The invention utilizes an installation base of the traditional device without disassembling the cylinder body of the traditional large-sized slide mill and has short repairing period, simple operation and safe and reliable running. The field repairing method of the welding cracks of the feeding slip-ring body is also suitable for the field reparation of welding cracks of a discharging slip-ring cone.

Description

technical field [0001] The invention belongs to the technical field of tube mills, and in particular relates to an on-site repair method for welding cracks in a feed slip ring body of a large-scale sliding shoe mill. Background technique [0002] Tube mill refers to a cylindrical rotary grinding machine with a long length and size. The cylinder aspect ratio of the tube mill is greater than 2.5. Because of its tubular shape, it is collectively called "tube mill". Tube mills are subdivided into sliding shoe mills and hollow shaft mills, and sliding shoe mills with a cylinder diameter greater than 4m are called large sliding shoe mills. Tube mills have been widely used in building materials, metallurgy, chemical industry, electric power, ceramics, medicine and national defense industries. [0003] With the development of my country's cement industry technology in recent years, the use of large sliding shoe mills has become quite common. Compared with hollow shaft mills, large ...

AI Technical Summary

Problems solved by technology

Usually, if the annular crack is not too serious, repair welding can be carried out on the weld of the slip ring and the web, but repair welding is not ideal, because the slip ring may be deformed after field repair welding, which affects the size of the slip ring Accuracy, shape and position tolerance or surface roughness, etc.; if the production is stopped, disassembled and repaired, the repair will take 2-3 months, which will bring tens of millions of major economic losses to the user, or replace the cylinder

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