Welding process of cutting pick head and cutting pick base of coal cutter

A technology of welding process and pick seat, which is applied in the field of picks, can solve the problems that the efficiency of mining machinery cannot be fully utilized, the hard alloy pick head falls off, and the service life cannot be met, so as to facilitate large-scale mechanized production, Improved production efficiency and high yield

Inactive Publication Date: 2015-12-16
ANHUI AODE MINING MACHINERY & EQUIP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, although the hard alloy pick head used has better wear resistance than steel, it still cannot meet the service life requirements, and due to the poor life of this kind of pick, it leads to frequent replacement of picks, making The efficiency of mining machinery cannot be fully utilized
At the same time, because the pick shank is made of alloy steel and other materials, the pick shank is extremely non-wear-resistant, causing the carbide pick head to fall off prematurely, resulting in premature damage and failure of the entire pick. The tooth shank is heat treated or a layer of wear-resistant welding rod is surfacing on the surface of the pick shank to increase the wear resistance and achieve the purpose of keeping the diameter, but the effect is not obvious

Method used

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  • Welding process of cutting pick head and cutting pick base of coal cutter
  • Welding process of cutting pick head and cutting pick base of coal cutter
  • Welding process of cutting pick head and cutting pick base of coal cutter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] see figure 1 : A welding process of a shearer pick head and a pick seat, comprising a pick handle 1, a pick seat 2 and a pick head 3, the pick seat 2 is connected to one end of the pick handle 1, and the pick The tooth head 3 is fixed in the pick holder 2, and the connection mode between the said pick head 3 and the pick holder 2 is copper brazing, and the welding process is as follows:

[0020] 1. Open the valve of the welding torch and ignite the welding torch, at this time black smoke will come out from the welding torch;

[0021] 2. Turn the oxygen regulating valve to make the flame on the tip of the welding torch evenly distributed, so that the temperature of the flame on the tip reaches 2900-3100°C;

[0022] 3. Use a welding torch to burn the contact part between the pick head and the pick holder and keep the distance between the welding tip and the welding part between 3-5cm. Make the welding torch move quickly and evenly, so that the contact part is heated even...

Embodiment 2

[0026] see figure 1 : A welding process of a shearer pick head and a pick seat, comprising a pick handle 1, a pick seat 2 and a pick head 3, the pick seat 2 is connected to one end of the pick handle 1, and the pick The tooth head 3 is fixed in the pick seat 2, and the pick head 3 includes a cemented carbide substrate and a diamond alloy layer coated on the end of the cemented carbide substrate, and the diamond alloy layer is surfacing welded on by diamond alloy powder. On the surface of the cemented carbide substrate end, a diamond alloy layer is formed, and the diamond alloy powder is made of the following components in mass percentage:

[0027]

[0028]

[0029] When the above diamond alloy powder is welded, it needs to generate 1500-2000°C within 0.5 seconds, and the diamond alloy powder is welded to the pick head to increase wear resistance, so that it can be matched with the alloy to achieve year-on-year wear. Because the instantaneous high temperature will not da...

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PUM

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Abstract

The invention discloses a welding process of a cutting pick head and a cutting pick base of a coal cutter. The welding process adopts a cutting pick handle, the cutting pick base and the cutting pick head, wherein the cutting pick base is connected to one end of the cutting pick handle, the cutting pick head is fixed in the cutting pick base, and copper brazing is adopted as the connecting mode between the cutting pick head and the cutting pick base. The welding process comprises the following steps: 1, opening a valve of a welding gun, and igniting the welding gun, and at the time, emiting black smoke from the welding gun; 2, rotating an oxygen regulating valve, so that flames on a welding nozzle of the welding gun are uniformly distributed, and the temperature of the flames on the welding nozzle achieve 2900-3100 DEG C; 3, burning the contact part between the cutting pick head and the cutting pick base by using the welding gun, wherein the distance between the welding nozzle and the welded part is 3-5cm, and the welding gun can not stay at one position to avoid fusion of the contact part if wondering that the welding gun moves rapidly and uniformly and the contact part is uniformly heated; 4, visually checking the cutting pick head and the cutting pick base, locally heating the part which is not fused, and trimming the unsmooth part; and 5, turning off the welding gun, and after the welding spot is cooled, completing the welding.

Description

technical field [0001] The invention relates to the technical field of picks, in particular to a welding process of a shearer pick head and a pick seat. Background technique [0002] In the prior art, coal mining and excavation picks are the key components of large coal shearers and roadheaders. Generally, carbide pick heads and alloy steel are welded (brazed) together, which are mainly used in mining in coal fields. In mining fields such as coal and roadway excavation, with the increasing demand for resources, large-scale mining machinery is used more and more widely, so higher requirements are put forward for the performance of mining picks. [0003] At present, although the hard alloy pick head used has better wear resistance than steel, it still cannot meet the service life requirements, and due to the poor life of this kind of pick, it leads to frequent replacement of picks, making The efficiency of mining machinery cannot be fully utilized. At the same time, because ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00
CPCB23K1/0008
Inventor 李保华王新廷
Owner ANHUI AODE MINING MACHINERY & EQUIP LTD
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