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Welding method

A welding method and joint joint technology, which is applied in the field of CO2 gas shielded welding of dissimilar steel solid wires in pulleys, can solve problems such as the development of bonded robot welding technology, high fillet weld bead, poor weld shape, etc., and achieve good filling Weld seam forming effect, strong economic benefits and use value, and the effect of reducing manufacturing processes

Inactive Publication Date: 2013-09-25
SHANGHAI ZHENHUA HEAVY IND
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Problems solved by technology

Due to CO 2 The opening angle of the arc is small, the root weld bead (that is, the root of the weld bead) is prone to unfused defects, the weld bead reinforcement of the filling bead is large, and the weld seam is poorly formed, which is prone to defects between weld bead
[0005] In addition, automatic robot welding usually adopts the method of solid wire mixed gas protection, and the common mixed gas composition is 80% Ar and 20% CO 2 , but the cost of the mixed gas is high, which hampers the development of robot welding technology

Method used

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Embodiment Construction

[0026] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same numbers will be used throughout the drawings to refer to the same or like parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the description of the present invention may be selected by the applicant according to his or her judgment, and the detailed meanings thereof are set forth herein described in the relevant section of the description. Furthermore, it is required that the present invention be understood not only by the actual terms used, but also by the meaning implied by each term.

[0027] Figure 1a Standard forms of prior art welded joints are shown. In the actual production proce...

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Abstract

The invention provides a welding method. A group of to-be-welded joints comprise a parent material and a backing plate respectively, wherein the parent materials of the group of the joints are different metal from each other; the side surfaces of the parent materials of the group of the joints are opposite to each other; each backing plate is arranged on the lower surface of the opposite side of each parent material. The welding method comprises the following steps: setting the nearest distance between the side surfaces of the parent materials to be a preset distance; welding the group of the joints in a saw-toothed swinging wire welding manner.

Description

technical field [0001] The present invention relates to a welding method, in particular to a kind of solid core welding wire CO 2 Gas shielded welding technology. Background technique [0002] The pulley is an important component of the hoisting machinery. The traditional pulley is manufactured by integral forging, which is costly. Now it is manufactured by welding. The material of the hub is low-alloy high-strength steel (commonly used as 35CrMo), and the material of the web is ordinary carbon. Steel (commonly used as A709-50-2), which greatly reduces production costs. The traditional welding manufacturing process is semi-automatic flux cored CO 2 Gas shielded welding, because of the connection of dissimilar metals, requires preheating before welding, heat preservation after welding, and the need to control the temperature between layers, which greatly increases the welding labor intensity of workers. At the same time, since the welding wire is flux-cored, welding slag n...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/133
Inventor 包孔盛凯杨晓华张华军刘长虹陈志荣
Owner SHANGHAI ZHENHUA HEAVY IND
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