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Carbon dioxide gas shielded welding machine and method of controlling arc strike by adopting digital pulse

A technology of gas shielded welding and carbon dioxide, which is applied in the direction of manufacturing tools, welding equipment, arc welding equipment, etc., can solve the problems of slow wire feeding arc ignition, difficult to use, etc., achieve high arc ignition success rate, improve service life, and reliability strong effect

Active Publication Date: 2014-10-15
SHENZHEN RILAND IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The common methods to improve the success rate of arc ignition are: start-up compensation for the characteristics of the welding power supply; increase the current rise rate; increase the short-circuit peak current; slow wire feeding arc ignition; parallel capacitor method; Point; in the semi-automatic carbon dioxide gas shielded welding machine, use scratch arc ignition method; connect capacitor in parallel between electrode and workpiece; and increase instantaneous arc ignition current, improve arc ignition performance, etc., so many methods are due to the consideration of circuit compatibility. Difficult to use with existing technology

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  • Carbon dioxide gas shielded welding machine and method of controlling arc strike by adopting digital pulse

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Embodiment Construction

[0033] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] The invention provides a method for controlling the arc ignition of a carbon dioxide gas shielded welding machine by using digital pulses, referring to figure 1 , In one embodiment, the method for controlling the arc ignition of a carbon dioxide gas shielded welding machine using digital pulses includes an arc ignition stage and an arc transition stage, wherein,

[0035] The arc ignition phase includes the following steps:

[0036] Step S100, supply air to the welding gun of the carbon dioxide gas shielded welding machine; the welding wire is fed in a slow wire feeding mode; when the output voltage is detected to be 0 volts, the carbon dioxide gas shielded welder outputs a short-circuit current pulse signal of 250-500 amperes to the welding wire strike the arc;

[0037] In this embodiment, when the arc is str...

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Abstract

The invention discloses a method of controlling the arc strike of a carbon dioxide gas shielded welding machine by adopting digital pulse. The method comprises the steps of feeding gas for a welding gun; feeding a welding wire in a slow wire feeding mode; when the output voltage is detected to be 0 volt, outputting a 250-500 ampere short-circuit current pulse signal to the welding wire for arc strike; when the output voltage is detected to be smaller than 8 volts, switching from the slow wire feeding mode of the welding wire into a quick wire feeding mode, outputting a 250-500 ampere short-circuit current pulse signal to the welding wire to build a molten pool, and controlling an arc to be subjected to transition from arc strike to a stable arc. According to the method, the transient impact stress which is borne by a hardware power device is reduced, and the service life is prolonged; the arc strike time is shortened, the arc strike process is stable, the reliability is strong, and the arc strike success rate is high; the molten pool is built in the arc strike process, and thus a basic is established for normal, stable and reliable welding in the future. The invention further discloses a carbon dioxide gas shielded welding machine.

Description

technical field [0001] The invention relates to the field of welding, in particular to a method and equipment for controlling the arc striking of a carbon dioxide gas shielded welding machine by using digital pulses. Background technique [0002] At present, the carbon dioxide gas shielded welding machine usually adopts the droplet transfer form of short-circuit transition, which is easy to realize all-position welding, and its arc ignition method adopts short-circuit arc ignition. Whether the arc ignition is successful or not and whether the arc can be started reliably at one time is directly related to whether the subsequent welding can be carried out normally, especially in the field of welding automation. However, if the arc is not properly controlled, a large section of welding wire will burst. On the one hand, this kind of bursting will directly affect the welding quality, cause weld defects, and affect the appearance; on the other hand, it may cause arc breaks. If th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/067B23K9/095B23K9/16
CPCB23K9/0673B23K9/095B23K9/16
Inventor 邱光王巍刘南王科海
Owner SHENZHEN RILAND IND
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