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Processing technology for prolonging service life of guiding slide shoes

A technology of guiding sliding shoes and processing technology, which is applied in metal processing equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as difficulty in grinding and polishing, complex structure, non-wearable sliding shoes, etc., and achieves reasonable design of process steps, Reasonable structural design, avoiding the effect of stress concentration

Active Publication Date: 2009-12-23
XIAN COAL MINING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The material of the guide shoe of the existing large shearer is ZG40Cr. Due to the complex and bulky structure of the guide shoe and the poor hardenability of ZG40Cr, the matrix strength of the guide shoe cannot meet the performance requirements; at the same time, the guide The complexity of the structure of the sliding shoe also makes quenching cracks frequently appear in the existing surface quenching process, resulting in the guide sliding shoe not being wear-resistant and frequently breaking during use, and the service life is as long as 2 to 3 months and as short as 7 to 15 days, seriously affecting the quality of large coal mining machines
In practice, we have tried to adopt the D322 process of the surfacing wear-resistant layer, but there are some problems. It is very difficult for workers to smooth and polish the surface of the surfacing wear-resistant layer D322, and it often takes 8 to 12 hours for a guide shoe

Method used

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  • Processing technology for prolonging service life of guiding slide shoes

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Effect test

Embodiment 1

[0055] In this embodiment, the processing technology for prolonging the service life of the guide shoe according to the present invention includes the following steps:

[0056] Step 1. Casting: adopt a casting furnace to cast and form the preliminary molded product of the guide shoe base. The raw material used in casting is ZG35CrMoV material. The internal cavity structure of the casting molding mold used during casting and the structure of the guide shoe base to be formed Correspondingly, the total thickness of the wear-resistant layer and the bottom welding layer between the wear-resistant layer and the guide surface is 6 mm, and the casting molding mold is used to form the guide shoe base between two adjacent guide surfaces. The forming corners of the included corners are all rounded corners with a radius of 8mm; the machining allowance left during casting is 2mm. The ZG35CrMoV material contains the following chemical components: 0.28-0.35% C, 1.0-1.4% Cr, 0.3-0.5% Mo, 0.5-...

Embodiment 2

[0074] In this embodiment, the difference from Embodiment 1 is that when the structure of the casting mold is determined in step 1, the total thickness of the wear-resistant layer and the bottoming welding layer between the wear-resistant layer and the guide surface is 6.5 mm and the molding angle used to form the angle between two adjacent guide surfaces of the guide shoe base in the casting molding mold is a rounded corner with a radius of 6 mm; the machining allowance left during casting is 4 mm. During the secondary machining in step 5, it is ensured that each root, that is, the edges and corners in the preliminary product of the guide shoe base is processed into a rounded corner with a radius of 6 mm. Before the bottom welding in step 801, put the XHD646 electrode into the oven for drying and keep it warm for 1 hour, and the drying temperature is 220°C; When the temperature of the guide surface of the finished boot substrate is preheated to 220°C, start welding. And when...

Embodiment 3

[0076] In this embodiment, the difference from Embodiment 1 is that when the structure of the casting mold is determined in step 1, the total thickness of the wear-resistant layer and the bottoming welding layer between the wear-resistant layer and the guide surface is 5.5 mm and the molding angles used to form the angle between two adjacent guide surfaces of the guide shoe base in the casting molding mold are all rounded corners with a radius of 7 mm; the machining allowance left during casting is 1 mm. During the secondary machining in step 5, it is ensured that each root, that is, the edges and corners in the preliminary product of the guide shoe base is processed into a rounded corner with a radius of 7 mm. Before root welding in step 801, put the XHD646 electrode into an oven for drying and heat preservation for 2 hours, the drying temperature is 180°C; When the temperature of the finished guiding surface of the boot substrate is preheated to 280°C, start welding. And wh...

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Abstract

The invention discloses a processing technology for prolonging the service life of guiding slide shoes. The processed guiding slide shoes consist of guiding slide shoe base bodies and wear-resisting layers, wherein the wear-resisting layers are welded on guiding surfaces. The technology comprises the following steps: firstly, casting: the guiding slide shoe base bodies are cast and shaped, the raw material is ZG35CrMoV, and the remained processing tolerance is from 1 mm to 4 mm; secondly, annealing; thirdly, primary machining: the outer end surfaces of lugs and the guiding surfaces are machined; fourthly, fault detection; fifthly, secondary machining: the rest part size is respectively machined; sixthly, quality regulation treatment: the finished guiding slide shoe base bodies with the brinell hardness of 240 to 280 are obtained; seventhly, peening treatment; eighthly, welding of wear-resisting layers: XHD646 welding bars are used for carrying out bottom welding firstly, and then DO*15 is used for carrying out surface welding on the wear-resisting layers; ninthly, deburring and repairing treatment; and tenthly, vibration aging. The invention has the advantages of reasonable design and convenient operation, and the processed guiding slide shoes have the advantages of high quality and long service life.

Description

technical field [0001] The invention belongs to the technical field of processing and manufacturing guide sliding shoes of large coal mining machines, and in particular relates to a processing technology for prolonging the service life of guiding sliding shoes. Background technique [0002] The material of the guide shoe of the existing large shearer is ZG40Cr. Due to the complex and bulky structure of the guide shoe and the poor hardenability of ZG40Cr, the matrix strength of the guide shoe cannot meet the performance requirements; at the same time, the guide The complexity of the structure of the sliding shoe also makes quenching cracks frequently appear in the existing surface quenching process, resulting in the guide sliding shoe not being wear-resistant and frequently breaking during use, and the service life is as long as 2 to 3 months and as short as 7 To 15 days, seriously affected the quality of the large coal mining machine. In practice, we have tried to adopt the...

Claims

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Application Information

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IPC IPC(8): E21C35/08B22C9/22C21D1/26C21D1/25C21D10/00B23K9/235B23K9/04B23K9/16
Inventor 王黔白西训
Owner XIAN COAL MINING MACHINERY
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