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Technology of carrying out surfacing of aluminum bronze on inner surface of coal mine hydraulic bracket 27SiMn oil cylinder

An inner surface, aluminum bronze technology, applied in the direction of manufacturing tools, welding equipment, arc welding equipment, etc., can solve problems such as scratches, affecting the sealing effect, high environmental pollution, etc., achieve stable welding quality, improve production efficiency, and reduce production cost effect

Inactive Publication Date: 2020-06-23
TIANJIN YINGYUAN WELDING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the working process of the bottom cylinder of the hydraulic support, hard particles such as coal chips are easy to accumulate on the mating surface with the column, causing scratches, and the hydraulic oil is easily mixed with corrosive media such as water and hydrogen sulfide, resulting in corrosion on the inner surface of the bottom cylinder , affect the sealing effect, and eventually cause the lifting force to drop. At present, the electroplating process is used, and its disadvantages are: 1. This process is highly polluting to the environment and seriously carcinogenic to the body; 2. It is easy to fall off and affects the service life.

Method used

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  • Technology of carrying out surfacing of aluminum bronze on inner surface of coal mine hydraulic bracket 27SiMn oil cylinder
  • Technology of carrying out surfacing of aluminum bronze on inner surface of coal mine hydraulic bracket 27SiMn oil cylinder
  • Technology of carrying out surfacing of aluminum bronze on inner surface of coal mine hydraulic bracket 27SiMn oil cylinder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: The material of the oil cylinder in the column of the coal mine hydraulic support is 27SiMn. The inner surface of the steel is surfacing with aluminum bronze, and the technical level of the surfacing of the copper layer is very important to the internal quality of the copper layer and the bonding performance of the steel matrix. The impact; due to the high carbon content of 27SiMn, the content of alloying elements is also high. Therefore, the main problem of welding is to avoid welding cracks, reduce the hardenability of the heat-affected zone, reduce the content of diffusible hydrogen before welding, and reduce the binding force of the welding zone.

[0019] The inner wall of 27SiMn oil steel cylinder is surfacing welded with aluminum bronze, and the process is as follows: the welding method is hot wire non-melting pole inert gas shielded welding, and the welding material is directly 1.2mm HK200 aluminum bronze welding wire, of which the hot wire is non-melti...

Embodiment 3

[0027] Embodiment 3: Taking a cylinder tube as an example, the cost and time comparison of newly manufactured products and repairing a cylinder tube with the technology of melting copper in the inner hole:

[0028] 1. New manufacturing process: preparation, turning, welding, heating, turning, boring, etc.;

[0029] 2. The cost of the two and the time it takes are compared as shown in the table below;

[0030]

[0031] Through calculation, it can be concluded that the cost of repairing a cylinder tube by melting copper is 1042.48 yuan compared with the new manufacture of a cylinder tube, and it takes 50.35 hours to manufacture a new cylinder tube, and it takes 21.83 hours to repair a cylinder tube by melting copper, and it takes 21.83 hours to manufacture a new one. The time-consuming is 2.3 times of repairing one root. It can be seen from the above table that the reasonable use of the new copper melting process can effectively shorten the overhaul cycle, and the overall qu...

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Abstract

The invention relates to the technical field of welding and discloses a technology of carrying out surfacing of aluminum bronze on the inner surface of a coal mine hydraulic bracket 27SiMn oil cylinder. The technology comprises the following steps: 1, evaluating the condition of the inner surface of the coal mine hydraulic bracket 27SiMn oil cylinder; 2, removing an accessory, rust and dirt; 3, boring the corrosion layer on the inner surface of the oil cylinder; and 4, adopting a HK 200 aluminium bronze welding wire with the diameter being 1-1.5 mm as the welding material, and adopting inert gas arc welding to weld the inner surface, except a thread, of the oil cylinder through a hot wire nonmelt electrode. With adoption of the technical scheme, the technology has the following benefits: the scrapped or to-be-scrapped hydraulic bracket 27SiMn oil cylinder is recycled, the original using performance of the oil cylinder is recovered through the technology, so that remanufacturing of theoil cylinder is reached; and the welding quality is stable, the technology completely replaces the electroplating technology to realize the remanufacturing effect, so that the production cost is greatly reduced, the production efficiency is improved and the service life of the oil cylinder is greatly prolonged.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a process for overlaying aluminum bronze on the inner surface of a 27SiMn oil cylinder of a coal mine liquid support. Background technique [0002] During the working process of the bottom cylinder of the hydraulic support, hard particles such as coal chips are easy to accumulate on the mating surface with the column, causing scratches, and the hydraulic oil is easily mixed with corrosive media such as water and hydrogen sulfide, resulting in corrosion on the inner surface of the bottom cylinder , affect the sealing effect, and eventually cause the lifting force to drop. At present, the electroplating process is used, and its disadvantages are: 1. This process is highly polluting to the environment and seriously carcinogenic to the body; 2. It is easy to fall off and affects the service life. Contents of the invention [0003] The purpose of the present invention is to aim at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/04B23P6/00
CPCB23K9/044B23K9/167B23P6/00
Inventor 边克勇徐家银宋宗贤
Owner TIANJIN YINGYUAN WELDING TECH
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