Inner wall shot peening strengthening treatment process and device

Abstract

The invention discloses an inner wall shot peening strengthening treatment process which is characterized by comprising the following steps: (1) introducing impact steel balls into an impact treatment pipe, and guiding the impact steel balls to a preset shot peening region by using electromagnets; (2) coordinating the magnetism magnitude and alternative frequency of the electromagnets according to the pipe diameter, pipe wall thickness, material to be impacted and diameter of impact steel balls, thereby guiding the impact steel balls to accelerate and collide with the inner wall of the pipe, and further implementing the shot peening strengthening by impacting; and (3) after finishing shot peening strengthening by impacting, recycling the impact steel balls and scraps by the electromagnets. The device comprises impact steel balls and electromagnets, wherein the electromagnets are matched with the impact steel balls and symmetrically arranged on the outer side of an impact treatment pipe, and connected with a control system via connecting cables. The electromagnets are utilized to guide the impact steel balls into the pipe, and the magnetism magnitude and frequency of the electromagnets are coordinated to adjust the speed of the impact steel balls, so that the impact steel balls collide with the inner wall of the pipe; and thus, the invention can be used for carrying out shot peening strengthening on the pipe with any inner diameter by impacting, thereby effectively prolonging the service life of the pipe.

Description

technical field [0001] The invention relates to a shot peening process, in particular to an inner wall shot peening strengthening treatment process and device. Background technique [0002] At present, in petroleum, chemical industry, power station, metallurgy and other fluid transmission industries, the use of pipelines is becoming more and more common. During the long-term use of pipelines, due to the corrosion of the environment and various media flowing inside, it is inevitable to produce If there is a certain damage, the pipe needs to be shot blasted at this time. [0003] Shot peening treatment, also known as shot peening strengthening treatment, is one of the effective methods to reduce fatigue damage of parts and improve service life. As the distance between the spray gun and the workpiece increases (reminiscent of the light of a flashlight, the farther it is, the more divergent), the processing position is difficult to control, especially for the narrow position, w...

AI Technical Summary

Problems solved by technology

[0004] However, in actual use, it is found that for long pipelines with small and medium inner diameters, the common shot peening impact strengthening treatment method can only be implemented on the outer surface of the pipeline, while the inner surface is often more likely to become the source of pipeline failure due to direct contact with corrosive media. In addition, as the most vulnerable part of the pipeline system, the welded joint is also particularly important for shot peening impact strengthening on its inner surface

Images