Laser cladding gear reconstruction and repair method

A technology of laser cladding and repairing methods, which is applied in the direction of coating, metal material coating technology, etc., can solve the problems of service life discount, failure to reach remanufacturing, etc., and achieve improved wear resistance, small heat-affected zone, low cost effect

Inactive Publication Date: 2019-02-22
阳泉煤业集团华越机械有限公司煤机装备研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some traditional repair methods cannot guarantee the original characteristics of the gear well, and the service life is greatly reduced, and it cannot meet the standard of remanufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take a certain gear in the running part of the model MG300 / 700 electric traction shearer as an example: After a period of use, many pitting corrosions appeared on the tooth surface of the gear, and the width of the pitting area on the tooth surface reached The total tooth height (the radius of the addendum circle minus the radius of the root circle) is 35%, and the length reaches 45% of the tooth length. If it does not meet the use standard, it is forced to be scrapped. The gear material is 18Cr2Ni4W, and its remanufacturing process is as follows:

[0015] (1) Thoroughly clean the surface of scrapped gears with kerosene, such as coal slime, metal chips and other impurities. In order to prevent other impurities from sticking to the tooth surface, after cleaning, wipe off the kerosene on the tooth surface with a rag that is not easy to fall off. The original color of the intact tooth surface should be exposed, and the pitting area should be polished with an angle grinder,...

Embodiment 2

[0023] Take a certain gear in the walking part of the cantilever roadheader model EBZ315 as an example: the gear tooth surface is glued (due to the relative sliding of the two gears, grooves are torn on the gear surface). Among them, the width of the glued area on the tooth surface reaches 1 / 2 of the full tooth height, and the length reaches 2 / 3 of the tooth length. If it does not meet the usage standards, it is forced to be scrapped. The gear material is 40Cr, and its remanufacturing process is as follows:

[0024] 1) Thoroughly clean the scrapped gears with kerosene for impurities such as coal slime and metal scraps on the surface. In order to prevent other impurities from adhering to the tooth surface, after cleaning, wipe off the kerosene on the tooth surface with a rag that is not easy to fall off. The original color of the intact tooth surface should be exposed, and the glued area should be polished with an angle grinder, file and other tools to reveal the metallic luste...

Embodiment 3

[0031] Take a certain gear in the Flender reducer model B3SH13-18-C as an example: the wear of the single surface of the gear reaches 8% of the tooth thickness, and it is forced to be scrapped if it does not meet the use standard. The material of the gear is No. 45 steel. The remanufacturing process is:

[0032] 1) Thoroughly clean the scrapped gears with kerosene for impurities such as coal slime and metal scraps on the surface. In order to prevent other impurities from adhering to the tooth surface, after cleaning, wipe off the kerosene on the tooth surface with a rag that is not easy to fall off, and the tooth surface should show its original color.

[0033] 2) Use anhydrous ethanol to thoroughly remove the residual oil on the surface of the cleaned gear, and then cladding repair can be carried out after air drying. If it cannot be repaired by cladding in time, it should be placed in a clean and pollution-free special box and covered to prevent sewage, impurities, metal ch...

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Abstract

The invention relates to a laser cladding gear reconstruction and repair method. The laser cladding gear reconstruction and repair method aims to prolong the service life of products and effectively save the production cost. The laser cladding gear reconstruction and repair method comprises the following steps of cleaning a scrapped gear with kerosene to remove surface impurities; wiping a tooth surface clean with cloth to reveal primary colors, and polishing an area to be repaired with an angle grinder and a file to reveal metallic luster; using absolute ethyl alcohol to carry out secondary cleaning, thoroughly removing residual oil stains on the tooth surface, and then carrying out air drying treatment; adopting metal powder to carry out local cladding treatment on damaged portions of gear surfaces through a laser cladding device, wherein the cladding area slightly exceeds a repairing area, and the cladding thickness exceeds the tooth surfaces by 1-1.5mm; and using a gear grinding machine to grind off gear surface allowance and complete tooth surface shaping and restoration.

Description

technical field [0001] The invention belongs to the technical field of gear remanufacturing, and mainly relates to a gear laser cladding remanufacturing and repairing method. Background technique [0002] Gear is a common transmission element, especially widely used in coal mining equipment, and is one of the most common wearing parts in the process of overhauling coal mining equipment. In order to obtain the various mechanical properties required, the manufacturing process of gears involves many processes and complex processes, so the production cycle of gears is relatively long, and the price is therefore very expensive. Due to the poor working conditions and heavy loads of coal mining equipment, the gears often suffer from severe wear, pitting, and gluing during use. If they do not meet the use standards, they must be scrapped and replaced with new gears. The price of a gear in an important part ranges from tens of thousands to hundreds of thousands. If it is scrapped du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05C22C38/02C22C38/04C22C38/34C22C38/40C22C38/54
CPCC22C19/05C22C38/02C22C38/04C22C38/34C22C38/40C22C38/54C23C24/103
Inventor 郭岱钱金宝胡明刚张福柱
Owner 阳泉煤业集团华越机械有限公司煤机装备研究院
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