Method for improving loading shovel bucket tooth welding strength

A welding strength and loader technology, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of lowering the bucket, reducing the performance of the bucket, losing the use value, etc., and achieving the effect of improving the welding strength.

Inactive Publication Date: 2015-04-22
GUANGXI LIUZHOU YUTIAN MACHINERY
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, post-welding deformation correction is not economical and seriously damages its working reliability.
In addition, fracture cracks often occur at the welds between the bucket teeth on both sides of the loader bucket and the side guard plate, and these cracks even extend to all the weld structures of the entire bucket lip (the flat plate with the bucket teeth), causing serious damage. Fracture damage reduces the performance of the bucket
The fracture cracks that have been formed are gradually expanded by the vibration of the equipment and the external force of the operation, and finally a large area of ​​fracture cracks is formed to reduce or lose the use value of the bucket

Method used

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Embodiment Construction

[0010] A method for improving the welding strength of loader bucket teeth, using flux-cored wire melting electrode gas shielded surfacing, the diameter of the flux-cored wire is 1.6mm, the welding current is 220-240A, the arc voltage is 24-26V, and the flow rate of CO2 gas 12~16L / min; heat the bucket teeth and side guards and keep the temperature of the parts to be welded at 300-400°C; the welding sequence is: first in the middle, then symmetrically weld to both sides; The mouth plate is welded at the corresponding position, and then the two sides of the bucket tooth are corresponding to the side guard plate from the tooth root to the tooth tip. CO2 gas-shielded arc surfacing welding of the molten electrode adopts semi-automatic or fully automatic process, and the surfacing speed is fast and the cladding rate is high; the density of CO2 gas is high, and the effect of isolating the air and protecting the welding area is very good; the thermal efficiency of CO2 arc is high, and t...

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Abstract

The invention provides a method for improving loading shovel bucket tooth welding strength. A flux-cored wire consumable electrode gas shielded overlaying is adopted, the diameter of a flux-cored wire is 1.6 mm, welding current is 220 A -240 A, arc voltage is 24 V-26 V, and CO2 gas flow is 12 L/min-16 L/min. Bucket teeth and a side protection plate are heated, the temperature at the position to be welded ranges from 300 DEG C to 400 DEG C. The welding sequence is the middle welding is in advance of sequential symmetric welding towards two sides. The tooth root ends of the bucket teeth are welded with the corresponding position of a bucket opening plate, and then two sides of the bucket teeth correspond to the side protection plate from tooth roots to tooth tops. By means of the method for improving the loading shovel bucket tooth welding strength, cracking, tearing, excessive abrasion, scattering during lifting and other fault phenomena do not occur in usage under the continuous high-strength working condition.

Description

technical field [0001] The invention relates to a method for improving the welding strength of bucket teeth of a loader bucket, which belongs to the technical field of machinery. Background technique [0002] When the loader bucket is used in continuous high-strength conditions, failures such as open welding, tearing, excessive wear, and boring scattering during lifting will occur. This is caused by the use of super-strength material density. The strength safety factor of the bucket Insufficiency is one of the main reasons. In general, the welding of the bucket support will inevitably produce welding residual deformation that cannot be ignored. However, post-welding deformation correction is not economical but also seriously damages its working reliability. In addition, fracture cracks often occur at the welds between the bucket teeth on both sides of the loader bucket and the side guard plate, and these cracks even extend to all the weld structures of the entire bucket li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/173B23K9/095B23K9/235
CPCB23K9/173B23K9/044B23K9/164B23K9/32
Inventor 罗继才江迪
Owner GUANGXI LIUZHOU YUTIAN MACHINERY
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