Method for regulating and controlling heat input of variable-polarity CMT

A heat input, changing polarity technology, applied in arc welding equipment, manufacturing tools, welding equipment, etc., can solve problems such as imperfect VP-CMT research

Inactive Publication Date: 2020-10-23
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

Nowadays, VP-CMT has been widely used and used, but the research on VP-CMT is not perfect, and there are few research reports on the relationship between the EP / EN Balance parameter (that is, the ratio of positive and negative electrodes in a cycle) to the joint morphology. and the effect of heat input

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  • Method for regulating and controlling heat input of variable-polarity CMT
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  • Method for regulating and controlling heat input of variable-polarity CMT

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Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0016] The test base material involved in the present invention is aluminum alloy 6061, the specification of the test piece is 300×150×4mm, and the welding wire is ER4043. A plate surfacing test was carried out on an aluminum alloy with a plate thickness of 4 mm using polarity-variable CMT technology. The CMT welder used for the test is the CMT Advanced 4000 welder from Fronius. EP / EN Balance distribution takes -2 (13 consecutive negative poles in one positive pole in one cycle), 0 (7 consecutive positive poles in one cycle and then 7 consecutive negative poles) and 2 (13 consecutive positive poles in one negative pole in one cycle), in Under the condition of synergy, plate surfacing is carried out.

[0017] Its main implementation steps are as follows:

[0018] 1. Before the surfacing test, use a wire brush to remove the oxide film on the alum...

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Abstract

The invention discloses a method for regulating and controlling the heat input of a variable-polarity CMT. The value of a parameter EP / EN Balance is changed, the influence of the EP / EN Balance on aluminum alloy heat input and joint forming under a unified condition is researched, and surfacing is carried on a flat aluminum alloy plate to obtain a surfacing joint with faultless surface and metallicluster.

Description

technical field [0001] The invention belongs to the field of welding technology, and more specifically relates to a CMT heat input welding process in the field of polarity-changing CMT technology. Background technique [0002] Cold Metal Transfer (CMT) is an advanced digital and unified welding technology developed by Fronius. Its main advantages are low heat input and almost no spatter in the welding process. CMT technology is mainly used for thin plate and ultra-thin plate welding, dissimilar material welding and low dilution rate surfacing welding, etc. In 2012, the company developed a variable polarity CMT (Variable Polarity CMT, VP-CMT) welding mode on the basis of DC CMT mode. VP-CMT is based on DC CMT technology, adding polarity conversion control Technology, the polarity change is completed in an instant, which further improves the stability of the CMT welding process, low heat input and spatter-free welding, and enhances the joint bridging ability and other advanta...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/09B23K9/235
CPCB23K9/04B23K9/092B23K9/235
Inventor 胡绳荪田银宝申俊琦勾健王谦
Owner TIANJIN UNIV
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