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Welding power supply

A technology of welding power supply and main welding current, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of reducing operation efficiency and arc failure, and achieve the effect of improving operation efficiency

Active Publication Date: 2013-03-06
OTC ELECTROMECHANICAL QINGDAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, when arcing is done again, sometimes arcing fails
Therefore, the work efficiency will be reduced, and the skill of the welder is also required.

Method used

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Examples

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Effect test

Embodiment approach 1

[0070] The embodiments of the invention will be described based on examples and with reference to the drawings. figure 1 It is a block diagram of the welding power source according to Embodiment 1 of the present invention. The welding power source of the first embodiment of the present invention, in order to prevent the burn-through of the penetration weld bead in the prior art, instead of quickly separating the arc welding rod from the base material so as to cut off the arc and cool the base material, Pass low-level current. That is, the main welding current is applied for back cover welding, the low-level current is applied to cool the base material, and the current is applied alternately according to the judgment of the welding operator. When the average current value of the main welding current during the back cover welding is 150A, in order to cool the base material, the low-level current is formed to be a current with an average current value of 30-50A that is smaller tha...

Embodiment approach 2

[0082] The welding power source of the second embodiment of the present invention replaces the welding power source of the first embodiment of the present invention by turning on or off the switch start switch BS to pass low-level current, by removing the coated arc electrode 2 from the base material 4 Pull it slightly apart or make it close to pass the low-level current or stop the low-level current. That is, when the arc length when the main welding current is applied is, for example, 5 mm, the arc length for applying the low-level current is formed to be longer than the arc length when the main welding current is applied, and the arc is not cut off. Long, and set to 8-10mm.

[0083] image 3 It is a block diagram of a welding power source according to Embodiment 2 of the present invention. In this figure, the voltage detection circuit VD of the welding power source PS2 detects the welding voltage Vw and outputs a voltage detection signal Vd. The arc length when the welding o...

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Abstract

The present invention provides a welding power supply (PS1) for avoiding working efficiency dropping and cooling a base metal to prevent burnthrough of penetration welding. In the welding power supply using a medicine arc welding strip to realize back cover welding, a main welding current setting circuit is used for outputting main welding current setting signals, a low level current setting circuit is used for outputting low level current setting signals made of high speed pulses. A current setting and switching circuit is used for outputting low level current setting signals as current setting control signals during the process of switching a starting switch and outputting high level signals, and outputting main welding current setting signals as current setting control signals during the period of outputting low level signals. A power supply main circuit is used for supply power between a medicine welding arc welding strip and the base metal. Working efficiency is greatly enhanced without skills of welding personnel.

Description

Technical field [0001] The invention relates to a welding power source for sealing bottom welding using a coating arc welding rod. Background technique [0002] The flux-coated arc welding in which an arc is generated between the flux-coated arc electrode and the base material to perform welding is widely used as a simple welding method (for example, refer to Patent Document 1). For welding of butt joints such as pipes, one-sided welding by arc welding is performed. However, in one-sided welding, backside welding is performed in which an adjusted wave bead is formed on the back side opposite to the groove side. [0003] In back cover welding using a coated arc electrode, the welding operator observes the state of the molten pool during welding, and when the arc continues for a few seconds and judges that it melts to the back side, in order to prevent excessive heat entering the base material The burn-through of the penetration weld bead causes the coated arc electrode to quickly l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10
Inventor 杨熙
Owner OTC ELECTROMECHANICAL QINGDAO CO LTD
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