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Digger teeth of ballast digger chain and manufacturing method thereof

A technology for excavating teeth and excavating chains, which is applied to the field of ballast excavating chain excavating teeth and its preparation, can solve the problems of restricting the service life of the excavating teeth, difficulty in melting the brazing material, weak bonding, etc., so as to improve the brazing connection strength and reduce the The difficulty of brazing process and the effect of prolonging the life of the digging teeth

Inactive Publication Date: 2012-02-22
CRRC BEIJING ERQI LOCOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using interference press-in connection, the connection is not firm, and it is easy to fall off during complex impact excavation. Brazing is performed with pre-soldered solder. Due to the constraints of the brazing process, it is difficult to melt the internal solder and easily form defects.
[0005] The excavating tooth shank only relies on impact hardening, and it will wear out quickly in the environment of subgrade ballast excavation; and only a few ring-shaped wear-resistant layers are clad on the surface of the excavating tooth shank, which is easy to fall off under severe impact conditions, which restricts the excavating tooth service life

Method used

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  • Digger teeth of ballast digger chain and manufacturing method thereof
  • Digger teeth of ballast digger chain and manufacturing method thereof
  • Digger teeth of ballast digger chain and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The excavating tooth of the ballast excavating chain disclosed in this embodiment comprises an excavating tooth shank and an alloy head embedded in one end of the excavating tooth shank,

[0035] The end of the digging shank close to the alloy head is provided with grooves along the direction of the helix, and the distance between two grooves is not limited; the grooves are provided with a thermal spraying and cladding groove wear-resistant layer; the digging shank is along the circumferential direction. An annular wear-resistant layer clad by thermal spraying is provided. The wear-resistant layer of the groove can be made of wear-resistant materials containing iron, carbon, silicon, boron and other metals. This embodiment solves the problem that the alloy head is easy to fall off, reduces the difficulty of the brazing process, and improves the wear resistance of the digging tooth handle. Applying this embodiment to a roadbed processing vehicle can improve its working ...

Embodiment 2

[0037] figure 1 It is a structural schematic diagram of the alloy head of the present invention; figure 2 It is a structural schematic diagram of the excavating tooth shank of the present invention; image 3 It is a structural schematic diagram of the excavating teeth of the ballast excavating chain of the present invention.

[0038] Depend on figure 1 It can be seen that the alloy head has a conical structure, and the material of the alloy head is YG13.

[0039] Depend on figure 2 It can be seen that the excavating tooth shank includes a frustum section and a cylindrical section with variable diameter, and the frustum section of the excavating tooth shank is provided with a central hole for embedding the alloy head; the radius of the end of the cylindrical section with variable diameter close to the embedded alloy head Larger than the end away from the alloy head, the radius of the cylindrical section away from the alloy head is reduced for installation and can also eff...

Embodiment 3

[0047] The preparation method of the excavation teeth of the ballast excavation chain described in embodiment 2, the steps are as follows:

[0048] First, process grooves along the direction of the helix at the end of the digging shank close to the alloy head (precision casting can be used to save costs);

[0049] The alloy head is embedded on the digging tooth handle, and the embedding is brazed;

[0050] Laser cladding is carried out in the groove to form a groove wear-resistant layer, the thickness of the groove wear-resistant layer is not limited, and it is preferably flush with the notch of the groove;

[0051] Finally, a ring-shaped wear-resistant layer is laser clad on the wearable part of the excavation tooth shank along the circumferential direction, and multiple ring-shaped wear-resistant layers can be set according to actual needs.

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Abstract

The invention discloses digger teeth of a ballast digger chain and a manufacturing method thereof. The digger teeth of the ballast digger chain comprise a digger tooth handle and an alloy head, wherein the alloy head is embedded into one end of the digger tooth handle; one end of the digger tooth handle close to the alloy head is provided with a groove along a spiral line; a cladded anti-abrasion layer is formed in the groove; and the digger tooth handle is provided with a cladded annular anti-abrasion layer along the circumferential direction. The digger teeth have the advantages of simple, reasonable, compact and firm structure, avoidance of a plurality of defects in the prior art, high abrasive resistance and long service life.

Description

technical field [0001] The invention relates to railway technology, in particular to an excavating tooth of a ballast excavating chain and a preparation method thereof. Background technique [0002] The ballast excavation chain excavation tooth is the key wearable part of the large-scale railway roadbed treatment vehicle. This part mainly consists of the excavation tooth handle and the alloy head fixed at the end of the excavation tooth handle. The excavation tooth handle and the alloy head are fixed in the form of brazing , its shape is similar to that of a coal pick, but the limited size of the components is much smaller than that of a coal pick, and the use environment is more severe and complex. In use, the alloy head first contacts with the ballast and wears first, but the failure mode is often that the alloy head falls off due to the excessive wear of the excavating tooth shank or the entire excavating tooth falls off from the shovel due to the excessive wear of the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B27/00
Inventor 焦传江钱兆勇王东孙建军孙保林任伯涛
Owner CRRC BEIJING ERQI LOCOMOTIVE CO LTD
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