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Compound electric arc welding method

An arc welding and arc technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of high voltage arc pressure at the end of the main arc, main arc deviation, etc., and achieve improved melting speed, reliable operation, and easy operation. The effect of large-scale promotion and implementation

Active Publication Date: 2012-12-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current welding method using composite arc has a large voltage arc pressure at the end of the main arc, and the main arc will shift, and to provide a method for composite arc welding

Method used

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specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination figure 1 Describe this embodiment, this embodiment connects the same pole output end of main power supply 1 and auxiliary power supply 2 with the head end of main melting electrode 3 at the same time, connects the other pole output end of main power supply 1 with workpiece 4 to be welded, auxiliary The output end of the other pole of the power supply 2 is connected to the head end of the auxiliary electrode 5, and its welding method is as follows:

[0018] Put the end of the main melting electrode 3 close to the part to be welded of the workpiece 4 to be welded, so that under the action of the main power source 1, a main arc is formed between the end of the main melting electrode 3 and the surface to be welded of the workpiece 4 to be welded; at the same time, the The end of the auxiliary electrode 5 is close to the end of the main melting electrode 3, so that under the action of the auxiliary power supply 2, a...

specific Embodiment approach 2

[0020] Specific implementation mode two: the following combination figure 1 This embodiment will be described. This embodiment is a further description of Embodiment 1, and the auxiliary electrode 5 is a melting electrode or a non-melting electrode. Other components and connections are the same as those in Embodiment 1.

[0021] When the auxiliary electrode 5 is a melting electrode, the diameter of the welding wire of the auxiliary electrode 5 can be the same as that of the main melting electrode 3, or it can be different; when the auxiliary electrode 5 is a non-melting electrode, the main arc formed by the main melting electrode 3 can be used to start the arc first. , After the auxiliary electrode 5 is energized, the arc can be started automatically without high-frequency arc starting.

specific Embodiment approach 3

[0022] Specific implementation mode three: the following combination figure 2 Describe this embodiment. The difference between this embodiment and Embodiment 1 or 2 is that it also includes N additional auxiliary power sources 6 and N additional auxiliary electrodes 7, where N is a natural number greater than zero.

[0023] The homopolar output terminals of the N additional auxiliary power supplies 6 are connected to the head end of the main melting electrode 3 at the same time. The other pole output terminal of the power supply 6 is connected with the head end of an additional auxiliary electrode 7,

[0024] When implementing welding, the end of each additional auxiliary electrode 7 is approached respectively to the end of the main melting electrode 3, so that under the effect of each additional auxiliary power source 6, the end of the main melting electrode 3 is connected to the end of each additional auxiliary electrode 7. Additional auxiliary arcs are formed between them...

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Abstract

The invention relates to an electric arc welding method with high welding wire melting speed and low welding heat input, belonging to the technical field of welding. The electric arc welding method solves the problem of the mutual contradiction between improving the melting speed of a welding wire and reducing the welding heat input in the consumable electrode electric arc welding method. The electric arc welding method is characterized in that: the homopolar output ends of a main power supply and an auxiliary power supply are connected with the head end of a main consumable electrode, and the other electrode output end of the main power supply is connected with a workpiece to be welded, and the other electrode output end of the auxiliary power supply is connected with the head end of an auxiliary electrode. The welding method comprises the following steps of: enabling the tail end of the main consumable electrode to be close to the part to be welded, of the workpiece to be welded, and forming a main electric arc between the tail end of the main consumable electrode and the surface to be welded, of the workpiece to be welded under the action of the main power supply; enabling the tail end of the auxiliary electrode to be close to the tail end of the main consumable electrode, forming an auxiliary electrode arc between the tail end of the main consumable electrode and the tail end of the auxiliary electrode under the action of the auxiliary power supply, and forming a composite electric arc between the main electric arc and the auxiliary electric arc so as to realize the welding. The invention is used as an electric arc welding method.

Description

technical field [0001] The invention relates to a compound arc welding method, belonging to the technical field of welding. Background technique [0002] Arc welding is the most widely used welding method at present, especially the metal arc welding because it has the advantages of adapting to all positions, automation and high efficiency, and has become the most important welding method at present, accounting for all metal welding applications. More than 70%. One of the main technical indicators to measure the welding efficiency in the welding application field is the melting amount of the welding wire per unit time, that is, the melting speed of the welding wire. Since the melting speed of the welding wire is proportional to the welding current, it is necessary to increase the melting speed of the welding wire. Increase welding current. While increasing the welding current is conducive to improving the welding penetration, it also increases the welding heat input. The in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/00B23K9/10
Inventor 耿正
Owner HARBIN INST OF TECH
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