Device for narrow gap welding and welding method

A narrow gap and welding power supply technology, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of difficult fusion of the two side walls of the gap and low welding efficiency, and reduce the possibility of non-fusion of the side walls. Effect of improving welding efficiency and reducing heat input

Active Publication Date: 2018-11-20
HARBIN INST OF TECH AT WEIHAI
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Problems solved by technology

[0004] In view of this, one of the objects of the present invention is to provide a device and welding method for narrow gap welding with high welding efficiency, good weld quality and good welding effect, so as to solve the problems of the two sides of the gap in the narrow gap welding process. Difficulty in fusion and low welding efficiency

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  • Device for narrow gap welding and welding method
  • Device for narrow gap welding and welding method
  • Device for narrow gap welding and welding method

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Embodiment Construction

[0039] The present invention is described below based on the embodiments, and those skilled in the art should understand that the drawings provided here are for the purpose of illustration, and the drawings are not necessarily drawn to scale.

[0040] Unless the context clearly requires, throughout the specification and claims, "comprises", "comprises" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive meaning; that is, "including but not limited to" meaning.

[0041] Note: In this application, directions such as up, down, left, and right are represented by figure 1 The directions shown in the

[0042] Such as figure 1 As shown, the present application provides a device for narrow gap welding, wherein the narrow gap refers to a gap with a width ranging from 10 to 15 mm, that is, the groove width is 10 to 15 mm. Preferably, when processing the thick plates 7 that need to be welded together, the groove between the thick plates...

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Abstract

The invention provides a device for narrow gap welding and a welding method. The device comprises a welding gun and a heating part, and the welding gun comprises at least two contact tubes which are arranged side by side. The device also comprises wire conveying parts which are respectively used for conveying welding wires to at least two contact tubes. The heating part is used for heating the welding wires in the contact tubes in a mode of pulse heating. The heat input of a welding arc to the welding wires is reduced, and the heat input of the welding arc to the side wall of a narrow gap is increased. Meanwhile, the flow path of a molten pool can be changed, and therefore the welding efficiency is effectively improved. The possibility that the side wall is not fused after welding is greatly reduced, and therefore a high-quality welding seam is obtained.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a device and a welding method for narrow gap welding. Background technique [0002] Narrow gap welding technology is very suitable for welding large thick plates, which has a small welding heat input, and the welding position of large thick plates in the narrow gap welding process adopts a narrow groove form, which can reduce the welding material use, saving resources. [0003] At present, the narrow gap welding methods mainly include TIG welding, MIG welding, laser welding, electron beam welding and so on. Narrow gap TIG welding is a thick plate welding method with very high welding quality, so it is widely used in the welding process of non-ferrous metal thick plates. In the existing narrow gap TIG welding process, the welding efficiency is very low because the heat input of the arc is not concentrated and the heat input is relatively small compared with other welding method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235B23K9/32
CPCB23K9/16B23K9/235B23K9/32
Inventor 孙清洁刘泰刘一搏徐鹏威冯吉才
Owner HARBIN INST OF TECH AT WEIHAI
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