Tube rolling set large-scale member repairing by macromolecular complex material and its process

Abstract

The present invention relates to a process for repairing large member of tube mill unit by adopting high-molecular compound material. It is characterized by that it utilizes the metal characteristics possessed by high-molecular compound material and uses it as filling repairing material. Said process includes the following steps: according to the position, accuracy and number of area to be repaired, define reference surface, design and make applicable mould; clean member to be repaired, check the wear condition of surface to be repaired, process the surface to be repaired to required size; dress, clean, degrease and corrode the surface to be repaired; apply demoulding agent on surface of mould, prepairng high-molecular compound material, fill it in the surface to be repaired, mount mould and regulate it to define the position, demould after said compound material is solidified; dress and check repaired accuracy and performance.

Description

technical field [0001] The invention relates to a repairing large-scale component of a pipe rolling unit by using a polymer composite material and a process method. Background technique [0002] Most of the large components of pipe rolling equipment work under high temperature, heavy load and harsh environment, and are severely corroded, damaged and worn. For example, the bearing seat hole of the square frame of the sizing machine will be worn to varying degrees after a period of use, and the wear is irregular wear, which seriously affects the transmission accuracy of the drive shaft, and causes inaccurate positioning of the sizing roller, and the hole shape is up to If the technical requirements are not met, the steel pipe sizing size will be out of tolerance, which will have a great impact on the quality of the steel pipe product. [0003] At present, various steel pipe manufacturers have carried out a number of repair tests on large components of the rolling mill. Take ...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: 1) The dimensional accuracy of the frame is high and the structure is complex, and the surfacing welding is easy to cause deformation or cracking of the frame

2) Machining after surfacing is more difficult

3) High repair costs

The disadvantages of this method are: 1) the process is complicated and requires high machining

2) If the precision of the processing equipment does not meet the requirements, the amount of grinding will be large

3) Due to the compact structure of the frame, some bearing housing holes cannot be nested

[0004] Most of the large-scale components of the pipe rolling mill are made of ductile iron. It is difficult to guarantee the accuracy requirements of the repair surface and the quality requirements of the steel pipe production by using welding inserts and surfacing welding methods. The repair process requires high requirements and is technically difficult.

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