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An electric welding method for electroslag pressure welding of steel bars without contact sparks

An electroslag pressure welding and non-contact technology, which is applied in the field of electric welding, can solve problems such as reducing the service life of welding fixtures, burning welding fixtures, and potential safety hazards, and achieves the effects of increasing service life, improving safety, and avoiding burning

Active Publication Date: 2016-06-29
SHANGHAI TAYOR HEAVY IND GRP +1
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Problems solved by technology

[0014] Aiming at the problems that arc sparks exist in the existing electroslag pressure welding process, causing potential safety hazards, burning welding fixtures, and reducing the service life of welding fixtures, the purpose of the present invention is to provide a non-contact spark electroslag pressure welding scheme for steel bars

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  • An electric welding method for electroslag pressure welding of steel bars without contact sparks

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Embodiment Construction

[0033] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0034] The present invention outputs a virtual voltage lower than the safety voltage through the output terminal of the welding machine during the electroslag pressure welding of steel bars, and simultaneously detects the output circuit of the welding machine in real time. When the output circuit of the welding machine is short-circuited , drop the virtual voltage to 0 volts. Therefore, when the power is turned on and off, the output terminal of the welding machine always applies a virtual voltage to the steel bar, but the current is very small, or even 0, so as to avoid contact with arc sparks during the process of turning on and off the power, and realize Electroslag pressure welding of rebar without contact sparks.

[0035] Based on above-me...

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Abstract

The invention discloses an electrowelding method of touch spark-free steel electroslag pressure welding. In the whole welding process, virtual voltage is output to a welding output end, and the virtual voltage is reduced to 0 volt when an output circuit is short-circuited. According to the scheme, touch arc-spark is avoided in the process of connecting and disconnecting a power supply, and the touch spark-free steel electroslag pressure welding is realized.

Description

technical field [0001] The invention relates to an electric welding technology, in particular to an electroslag pressure welding technology. Background technique [0002] Electroslag pressure welding is to place two steel bars in a vertical or oblique (inclination range of 4:1) butt joint form, using welding current to pass through the gap between the two steel bars, forming an arc process and an electroslag process under the flux layer, resulting in Arc heat and resistance heat, melting steel bar, pressurized to complete a pressure welding method. Simply put, it is a fusion welding method that uses the resistance heat generated by the current passing through the liquid slag for welding. However, compared with arc welding, it has high work efficiency and low cost, and has achieved good results in some high-rise building constructions. According to the electrode shape used, it can be divided into wire electroslag welding, plate electroslag welding, and nozzle electroslag we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K25/00
CPCB23K25/00
Inventor 王进成陈振刚陈赛虎陈良王成多莫桂敏高世杰蔡涛冯光永邱翼宝裘群超徐永胜祁剑丁俊杰沈飞刘波谭津王琦童健文陈之峰胡红林周亚红王天府刘贤芬赵尔新何珍全马金普张世康呙军
Owner SHANGHAI TAYOR HEAVY IND GRP
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