Process for repairing inner surface damages in outer cylinder and inner cylinder of mine hydraulic support column

Abstract

The invention relates to process for repairing inner surface damages in an outer cylinder and an inner cylinder of a mine hydraulic support column. The repair process comprises the following steps of: lathing off the cylinder bottom of a cylinder on a lathe; grinding off a joint and an oil pipe; lathing both ends of the cylinder flat with an upper lathe, chamfering an external angle of 15 DEG, and repairing a frame opening; boring an inner bore; heating a place to be embedded with the cylinder in the bored inner bore of the cylinder to a temperature between 580 and 620 DEG C; discharging the cylinder, putting the cylinder on a disk tool on a platform, quickly pressing a stainless steel cylinder into the inner bore of the cylinder through a spinning machine, and simultaneously spinning to make the stainless steel cylinder and the inner wall of the cylinder complete close interference fit; immersing the cylinder with the stainless steel cylinder into water for quenching when the cylinder temperature is between 450 and 500 DEG C, and rolling the inner bore with an upper deep hole boring machineafter cooling the cylinder with the stainless steel cylinder to a normal temperature; grinding the inner bore with a grinder; repairing a cylinder opening inner chamfer angle of 20 DEG with the upper lathe; and welding the cylinder bottom by the conventional process, assembling the cylinder, and testing pressure to complete the process. The repair process can repair the inner surface damages in the outer cylinder and the inner cylinder of the mine hydraulic support column to reuse the outer cylinder and the inner cylinder so as to avoid waste, and has the advantages of reliability, easy operation and stable product quality.

Description

Technical field: [0001] The invention relates to a process for repairing damages on the inner surfaces of the outer cylinder and the middle cylinder of a vertical column of a mine hydraulic support. Background technique: [0002] The outer cylinder and the middle cylinder of the mining hydraulic support column, after a period of use, the inner surface has strains, scratches, normal wear, water corrosion or cylinder swelling. Due to the high value of the outer cylinder and the middle cylinder of the column, if there are strains, scratches, wear, corrosion or expansion of the cylinder, if it is treated as scrap, the loss to the enterprise will be great, and the repair will be more difficult. Invention content: [0003] The purpose of the present invention is to provide a repair process for the damage of the inner surface of the outer cylinder and the middle cylinder of the hydraulic support column for mining, which is used to repair the inner surface of the outer cylinder an...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a repair process for the damage of the inner surface of the outer cylinder and the middle cylinder of the hydraulic support column for mining, which is used to repair the inner surface of the outer cylinder and the inner surface of the middle cylinder of the hydraulic support column of the mining hydraulic support and the inner surface similar to the cylinder barrel. The technical problem that the inner surface of the cylinder is not easy to repair

Images