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Plasma-MIG composite welding device used for narrow gap welding

A plasma welding and composite welding technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of difficult and narrow gap welding, inability to penetrate into narrow gaps, and inability to achieve dynamic and flexible coupling of two welding arcs. Build quality and efficiency, the effect of efficient narrow gap welding

Active Publication Date: 2019-05-21
HARBIN INST OF TECH AT WEIHAI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the nozzle at the lower end of the composite welding torch of the plasma-MIG composite welding device is too wide. The diameter of the nozzle top of the existing general plasma welding torch is 20-40mm. Peripheral width, unable to penetrate into narrow gaps, it is difficult to apply to narrow gap welding, that is, it is impossible to realize narrow gap welding of medium-thick plates and large-thick plates above 40mm
In addition, in the existing welding technology, the traditional paraxial narrow-gap welding torch has not been designed isomerized, so the narrow-gap plasma-MIG hybrid welding in the existing technology cannot realize the dynamic and flexible coupling of the two welding arcs

Method used

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  • Plasma-MIG composite welding device used for narrow gap welding
  • Plasma-MIG composite welding device used for narrow gap welding
  • Plasma-MIG composite welding device used for narrow gap welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a plasma-MIG composite welding device for narrow gap welding, such as Figure 1-7 As shown, it includes a left air supply pipe 22 , a plasma welding module, a melting electrode welding module, and a right air supply pipe 19 arranged in sequence and arranged in a row.

[0052] The plasma welding module is used to provide a plasma arc;

[0053] The melting electrode welding module is used to provide a reciprocating swingable MIG arc;

[0054] The left air delivery pipe 22 is provided with a left fixed magnetic guide plate 23 and a left coil 21; the right air delivery pipe 19 is provided with a right fixed magnetic guide plate 18 and a right coil 20, and the fixed magnetic guide plate and the coil stabilize the magnetic field at The surroundings of the plasma arc provided by the plasma welding module enable the plasma arc to swing.

[0055] The two arcs, plasma arc and MIG arc, swing synergistically, which can realize the coupling of the two arc...

Embodiment 2

[0077] Utilize the welding method that the plasma-MIG compound welding device disclosed in above-mentioned embodiment carries out, concrete working process comprises:

[0078] Step 1. Welding preparation stage

[0079](1) Connect the circulating cooling water to cool the plasma square nozzle 1 and the plasma tungsten electrode clamp jacket 7; specifically: the cooling water used to cool the plasma square nozzle 1 flows in from the cooling water inlet C, and is cooled by the cooling water tank The water outlet B flows out to form a nozzle cooling water circuit; the cooling water used to cool the tungsten electrode flows through the π-shaped cooling water channel from the tungsten electrode cooling water inlet E, and then flows out from the tungsten electrode cooling water outlet F to form a water circuit.

[0080] (2) The plasma welding module is connected to the plasma arc maintenance power supply, the plasma main arc power supply, the ion gas supply device, and the shielding ...

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Abstract

The invention discloses a plasma-MIG composite welding device used for narrow gap welding, and belongs to the technical field of efficient welding and special welding. The plasma-MIG composite weldingdevice comprises a plasma welding module, a consumable electrode welding module, a left gas supply pipe and a right gas supply pipe. The left gas supply pipe, the plasma welding module, the consumable electrode welding module and the right gas supply pipe are arranged in sequence to form a row. The plasma welding module is used for providing plasma arcs. The consumable electrode welding module isused for MIG arcs capable of swinging in a reciprocating manner. Magnetic conduction plates are arranged on the left gas supply pipe and the right gas supply pipe and stabilize a magnetic field around the plasma arcs provided by the plasma welding module so that the plasma arcs can swing. The plasma arcs and the MIG arcs swing coordinately, coupling of the two kinds of arcs can be achieved, and then narrow gap welding of medium-thickness plates can be achieved.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a plasma-MIG composite welding device for narrow gap welding. Background technique [0002] Traditional narrow gap welding methods can be divided into narrow gap gas metal arc welding (NG-GMAW), narrow gap submerged arc welding (NG-SAW), narrow gap argon tungsten arc welding (NG-GTAW), narrow gap electrode arc welding , Narrow gap electroslag welding, narrow gap laser welding. [0003] In the existing narrow gap welding, the most commonly used methods are NG-GMAW, NG-SAW and NG-GTAW. Among them, NG-GMAW is prone to spatter, and it is easy to produce sidewall unfused defects under low heat input. NG -SAW requires interlayer slag removal and is prone to defects such as slag inclusions and pores, while NG-GTAW has low cladding efficiency and mostly uses hot wire welding, and the process is more complicated. In addition, narrow-gap laser welding requires high precision and expensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02
Inventor 张洪涛吴宝才何鹏张鸿昌果春焕王波张文杰
Owner HARBIN INST OF TECH AT WEIHAI