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Method for automatically welding narrow groove of hydraulic support structural part

A technology of automatic welding and hydraulic support, which is applied in the direction of welding equipment, welding accessories, welding rod characteristics, etc., can solve the problems of restricting the production cycle and welding quality of hydraulic support, leaving gaps easily, and affecting the performance of weld seams, etc.

Pending Publication Date: 2020-12-11
ZHENGZHOU COAL MINING MACHINERY GRP
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AI Technical Summary

Problems solved by technology

On the one hand, the thickness of the cover plate is relatively thick, generally between 20-30mm. Due to the narrow groove, large depth, and narrow space at the root of the groove, it is difficult for the welding arc to penetrate deep into the root, and it is difficult to fuse the root with ordinary welding methods. , it is easy to leave gaps and affect the performance of the weld; on the other hand, the blunt edge of the narrow groove is generally about 2mm in theory, but due to the cutting error, the blunt edge of the groove of the actual cover part floats within 0-4mm, And due to the low assembly accuracy, the consistency of the groove gap formed by the cover plate parts is poor, generally changing frequently within the range of 0-2mm, which makes it difficult to maintain the consistency of the welding effect everywhere, and the welding is extremely difficult
At present, the welding wires generally used for welding hydraulic support structural parts in the industry are solid welding wires, and the diameters of the welding wires are φ1.2mm and φ1.6mm. The current produces a small arc, which is helpful for the fusion of the root of the narrow groove, but the welding efficiency of this kind of welding wire is low, and the average welding wire deposition rate can only reach 5kg / h, which is not conducive to the automatic welding of hydraulic supports, and seriously restricts The production cycle and welding quality of the hydraulic support are improved; after adopting the thicker diameter φ1.6mm welding wire, although the welding efficiency has been significantly improved, due to the thick arc at the end of the welding wire, the molten pool cannot enter the root of the narrow groove, resulting in fusion at the root of the weld poor sex
[0003] At present, there is no welding method with high welding efficiency and excellent welding effect for the narrow groove of the cover plate with the characteristics of narrow groove, large depth, and poor consistency of the blunt edge.

Method used

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  • Method for automatically welding narrow groove of hydraulic support structural part
  • Method for automatically welding narrow groove of hydraulic support structural part

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Embodiment Construction

[0021] The technical solutions of the present invention will be described in further detail below through specific implementation methods.

[0022] Such as figure 1 and figure 2 As shown, an automatic welding method for a narrow groove of a hydraulic support structure includes the following steps:

[0023] The first step, the step of cleaning the groove, prepares the structural parts of the hydraulic support to be welded, removes the rust, oil, scum and other impurities within the range of 30-50mm on both sides of the groove, and grinds the groove with an angle grinder until it appears Metallic luster;

[0024] The second step, the step of groove assembly, assembles the grooves of the hydraulic support structural parts to be welded together. When assembling, ensure that the assembly gap is ≤2mm, and the groove angle is 30-40° (cover plate 1, vertical plate 2 and The bottom plate 3 forms a box structure of the hydraulic support structure);

[0025] The third step, the ste...

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Abstract

The invention provides a method for automatically welding a narrow groove of a hydraulic support structural part. The method comprises the following steps that S1, a hydraulic support structural partto be welded is spliced into the narrow groove, and the groove angle of the narrow groove is 30-40 degrees; S2, a welding robot is subjected to offline programming or field programming teaching; S3, the large fusion depth function of the welding robot is started, the welding gun angle of the welding robot is adjusted, a welding gun equally divides the narrow groove, and compression arc large fusion depth bottoming welding is carried out; and S4, the narrow groove is subjected to filling cosmetic welding. The method for automatically welding the narrow groove of the hydraulic support structuralpart has the advantages that the welding efficiency is high, the fusion effect of the root of the narrow groove is good, the consistency of the welding effect of all positions is high, and the product performance is good.

Description

technical field [0001] The invention relates to a welding method, in particular to an automatic welding method for narrow grooves of hydraulic support structural parts. Background technique [0002] As the main support equipment in coal mine fully mechanized mining equipment, hydraulic support has the characteristics of large volume and weight, harsh service conditions, many box-shaped welding structures, complicated weld seams, and large welding volume. All components of the hydraulic support are box-shaped structures composed of medium and thick plates. The general box body is composed of a bottom plate, a vertical plate and a cover plate, etc., and the welds at the cover plate are all groove welds. In order to improve welding efficiency, To reduce welding costs, the groove angle of some cover plates is less than 45°, generally 30-40°, which we call narrow groove. On the one hand, the thickness of the cover plate is relatively thick, generally between 20-30mm. Due to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/28B23K9/32
CPCB23K9/16B23K9/28B23K9/32
Inventor 杨明杰朱红波赵旭兰志宇韩振仙段青辰凡乃峰银升超吴瑞芳王海洋
Owner ZHENGZHOU COAL MINING MACHINERY GRP
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