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Device and method for magnetic control of wet process underwater welding

A technology of underwater welding and magnetic control devices, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problem that the droplet transition is not easy to transition to the base metal, etc., to improve welding efficiency, wide range of technical applications, The effect of reducing pores

Active Publication Date: 2015-04-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the droplet transfer in the existing underwater welding is not easy to transfer to the base metal, and provides a magnetic control device and method for wet underwater welding

Method used

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  • Device and method for magnetic control of wet process underwater welding

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specific Embodiment approach 1

[0025] Specific Embodiment 1: A magnetic control device for wet underwater welding according to this embodiment, which consists of an excitation power source 1, a magnetic core 2-1, an excitation coil 2-2, a copper sleeve 2-3, an upper end The cover 2-4 and the lower end cover 2-5 are composed, the magnetic conducting core 2-1 is hollow cylindrical, the excitation coil 2-2 is wound on the outer surface of the magnetic conducting core 2-1, and the copper sleeve 2-3 Covered outside the excitation coil 2-2, the upper end cover 2-4 is covered on the upper end of the copper sleeve 2-3, and the lower end cover 2-5 is covered on the lower end of the copper sleeve 2-3, which is characterized in that the In the magnetron device for wet underwater welding, the lower end of the permeable core 2-1 flares downward to form an inner conical surface, and the lead-out wire of the excitation coil 2-2 is drawn out through the bakelite ring 2-6, and the The bakelite ring 2-6 is sealed with silica...

specific Embodiment approach 2

[0035] Specific embodiment two: a kind of magnetic control method for wet underwater welding of this embodiment is realized according to the following steps:

[0036] Step 1. Under the condition of water depth of 1-500m, install the magnetic control device above the welding workpiece 3 and connect the excitation power supply 1;

[0037] Step 2, the welding wire is passed through the through hole 2-1-1 of the conductive core 2-1, the shielding gas is applied and the arc between the welding wire and the welding workpiece is ignited to start welding; wherein, the excitation current of the magnetic control device is 1-20A, the excitation frequency is 1-50HZ, the wet underwater welding current is 150-500A, the wire feeding speed is 2-50m / min, the wire diameter is 0.8-2.4mm, and the shielding gas flow rate is 0-50L / min min, the welding voltage is 20-60V, and the welding speed is 500-1000mm / min.

[0038] There are several ways to change the external magnetic field in this embodiment...

specific Embodiment approach 3

[0052] Embodiment 3: This embodiment is different from Embodiment 2 in that: the welding method described in step 2 is FCAW. Other steps and parameters are the same as in the second embodiment.

[0053] Verify beneficial effect of the present invention by following test:

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Abstract

The invention relates to a device and method for magnetic control of underwater welding, in particular to a device and method for the magnetic control of the wet process underwater welding and is applicable to the technical field of welding. The problem in the existing underwater welding that globular transfer can not be transited to a base material easily is solved. The magnetic control device is formed by an excitation power supply, a magnetic conducting core, an excitation coil, a copper sleeve, an upper end cover and a lower end cover. The magnetic control method includes that 1, the magnetic control device is installed, and the excitation power supply is connected; 2, a welding wire penetrates through a through hole of the magnetic conducting core, protecting gas is exerted, and an electric arc between the welding wire and a welding workpiece is ignited, namely wet process underwater welding is finished. The device and method for the magnetic control of the wet process underwater welding is applied to the technical field of welding.

Description

technical field [0001] The invention relates to a magnetic control device and method for underwater welding, which is suitable for the field of welding technology. Background technique [0002] With the development and utilization of marine resources, underwater welding technology is required for the emergency repair of submarine oil pipelines, offshore drilling platforms and ships. Underwater welding includes dry, partially dry and wet methods. Wet underwater welding does not require complicated equipment, and the diver or equipment dives into the water for welding, which has the characteristics of simple operation and rapid response. When performing wet underwater welding, the welding quality is greatly affected by welding parameters, welding structure, environment, water depth and other factors. Especially for the droplet transfer in underwater welding, due to the influence of the high-pressure quenching environment, the droplet is not easy to transfer to the base metal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/08
Inventor 李海超陈弈高洪明李凯巩杉
Owner HARBIN INST OF TECH
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