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 w

Method used

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  • Processing technology for prolonging service life of guiding slide shoes

Examples

Experimental program
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Example Embodiment

[0054] Example 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: Use a casting furnace to cast the preliminary molded product of the guide shoe base. The raw material used during casting is ZG35CrMoV. The internal cavity structure of the casting mold used during casting and the structure of the guide shoe base need to be molded 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 mold is used to form the guide shoe base between two adjacent guide surfaces The forming angles of the included angles 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 to 0.35% C, 1.0 to 1.4% Cr, 0.3 to 0.5% Mo, 0.5 to 0.8...

Example Embodiment

[0073] Example 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 bottom welding layer between the wear-resistant layer and the guide surface is 6.5 mm and the forming angle used for forming the angle between the two adjacent guide surfaces of the guide shoe base in the casting forming mold is a rounded corner with a radius of 6mm; the machining allowance left during casting is 4mm. During the secondary machining in step 5, it is ensured that the roots, i.e., corners of the preliminary product of the guide shoe base body, are all processed into rounded corners with a radius of 6 mm. Before performing the bottom welding in step 801, put the XHD646 electrode into an oven for drying and keep it warm for 1 hour at a drying temperature of 220°C; during the bottom welding, use the torch of the manual arc welding machine to slide the guide When the ...

Example Embodiment

[0075] Example 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 bottom welding layer between the wear-resistant layer and the guide surface is 5.5 mm and the forming angle used for forming the angle between the two adjacent guide surfaces of the guide shoe base in the casting forming mold is a rounded corner with a radius of 7mm; the machining allowance left during casting is 1mm. During the secondary machining in step 5, it is ensured that the roots, i.e. corners, in the preliminary product of the guide shoe base body are processed into rounded corners with a radius of 7 mm. Before performing the bottom welding in step 801, put the XHD646 electrode into an oven for drying and keep it warm for 2 hours at a drying temperature of 180°C; during the bottom welding, use the torch of the manual arc welding machine to slide the guide When the temp...

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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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