Direct-current submerged arc welding machine fusion depth increasing method and achieving circuit

A technology of submerged arc welding machine and depth of penetration, which is applied in the direction of arc welding equipment, welding equipment, manufacturing tools, etc., which can solve the problems of reduced welding efficiency and welding penetration that cannot meet the requirements, so as to reduce the number of welding layers and improve the welding efficiency. Speed, the effect of reducing the groove angle

Active Publication Date: 2015-02-04
CHENGDU HUAYUAN ELECTRIC EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for enhancing the penetration depth of a DC submerged arc welding machine and a realization circuit, which solves the problem that the welding penetration depth of the DC submerged arc welding fails to meet the requirements in the past, resulting in a decrease in welding efficiency

Method used

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  • Direct-current submerged arc welding machine fusion depth increasing method and achieving circuit
  • Direct-current submerged arc welding machine fusion depth increasing method and achieving circuit
  • Direct-current submerged arc welding machine fusion depth increasing method and achieving circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as figure 1 As shown, a method for enhancing the penetration depth of a DC submerged arc welding machine described in this implementation includes the following steps:

[0037] (1) Keep the effective value of the welding current unchanged, and adjust the peak-to-peak value of the pulse current to make it within the range of 300~500A;

[0038] (2) Keep the effective value of the welding current unchanged, and adjust the pulse width ratio of the pulse current so that it is within the range of 40% to 60%;

[0039] (3) Adjust the frequency of the pulse current so that it is in the range of 20~100Hz.

[0040] Taking the effective value of 600A as an example, Tables 1 to 9 show the influence of frequency on penetration when the current peak-to-peak value and pulse width ratio are constant.

[0041] Table 1 The effect of frequency on penetration when the peak-to-peak value is 400A and the pulse width ratio is 50%

[0042]

[0043] Table 1

[0044] Table 2 The e...

Embodiment 2

[0077] Such as image 3 As shown, this embodiment is basically the same as Embodiment 1, the difference is that this embodiment also includes a resistor R1 and a capacitor C1, and the resistor R1 and capacitor C1 are connected in parallel between the positive input terminal of the operational amplifier N1A and the ground terminal, and the resistor R1 and capacitor C1 can reduce the interference in the input signal, filter the signal, and ensure a stable and reliable output signal.

Embodiment 3

[0079] Such as Figure 4 As shown, on the basis of Embodiment 2, this embodiment also includes a resistor R2, the resistor R2 is connected in series with the parallel resistor R1 and capacitor C1 and then connected between the positive input terminal of the operational amplifier N1A and the ground terminal. This increases the input impedance, prevents the abnormal voltage from the input signal from damaging the operational amplifier N1A, and increases the service life of the operational amplifier N1A.

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Abstract

The invention discloses a direct-current submerged arc welding machine fusion depth increasing method and an achieving circuit. The method includes the following steps: (1) keeping a welding current effective value unchanged, adjusting a pulse current peak value to be within a range of 300-500 A; (2) keeping the welding current effective value unchanged, adjusting pulse width ratio of pulse current to be in a range of 40%-60%; and (3) adjusting the frequency of the pulse current to be in a range of 20Hz-1000Hz. The circuit comprises a pulse bottom value current output circuit, a pulse peak current output circuit and an oscillating circuit. By means of the design, fusion depth can be increased, welding efficiency is improved, and a welding requirement of a user is met to a large extent.

Description

technical field [0001] The invention relates to the field of direct current submerged arc welding, in particular to a method for enhancing the penetration depth of a direct current submerged arc welding machine and a realization circuit. Background technique [0002] At present, there are mainly two types of DC submerged arc welding machines that are widely used, namely thyristor rectifier type and inverter type. The output welding current is filtered by the filter reactor to output a stable DC welding current. In the actual use process, it cannot meet the user's welding process requirements on some metal thick plates, mainly because the welding penetration cannot meet the requirements under the welding current and welding voltage specified in the process, which greatly reduces the welding efficiency. Contents of the invention [0003] The invention provides a method for enhancing the penetration depth of a direct current submerged arc welding machine and a circuit for rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/09B23K9/18H02M9/02
Inventor 袁荣勤王洪张永刚
Owner CHENGDU HUAYUAN ELECTRIC EQUIP
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