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Real-time tracking control method of magnetron arc sensing weld seam in gas metal shielded welding

A melting electrode gas and arc sensing technology, used in arc welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of poor real-time performance, complex structure, low control accuracy, etc., and achieve good tracking effect and high control accuracy. , The effect of stable and reliable operation

Inactive Publication Date: 2012-02-01
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is mainly to solve the problems of complex structure, low control precision and poor real-time performance of the current automatic tracking control system for gas metal arc welding.

Method used

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  • Real-time tracking control method of magnetron arc sensing weld seam in gas metal shielded welding
  • Real-time tracking control method of magnetron arc sensing weld seam in gas metal shielded welding
  • Real-time tracking control method of magnetron arc sensing weld seam in gas metal shielded welding

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Effect test

Embodiment 1

[0014] In Embodiment 1, the present invention is composed of a welding system, a control system, and a tracking actuator composed of a magnetron arc sensor, a welding gun, and a welding power source. The magnetron arc sensor is installed on the welding gun, and the welding gun is installed on the tracking actuator. The magnetron arc sensor generates an alternating magnetic field and drives the MIG welding arc to swing at a certain frequency and amplitude, thereby scanning the weld to obtain weld information, which is filtered and amplified by the filter circuit and sent to the control system for processing and control The system adjusts the execution structure of the slider and the welding trolley in real time to track the weld seam. The welding point of the system is the collection point of deviation signal, and it can be tracked while welding, and the real-time performance is very good. See figure 1 .

[0015] It mainly solves the problems of complicated structure, high cost,...

Embodiment 2

[0017] In Embodiment 2, the magnetron arc sensor of the present invention is composed of excitation power supply, magnetic field generating device, Hall sensor and other components. The magnetic field generating device is directly installed on the welding gun of MIG welding, so the temperature is very high during welding. , There are a lot of spatters. The pair of magnetic poles of the magnetic field generator are made of high temperature resistant materials and made into a replaceable form. The structure of the magnetron arc magnetic field generator figure 2 . The function of the excitation power supply is to generate an excitation current with adjustable frequency and amplitude and two interrupt pulse signals with the same frequency as the excitation current. The function of the interrupt pulse signal is to determine the position of the start of sampling. Refer to the structure diagram of the excitation power supply. image 3 . During welding, the excitation coil generates a...

Embodiment 3

[0018] In Embodiment 3, the filter circuit of the present invention uses two Butterworth low-pass filters connected in series for hardware filtering. Because in MIG welding, the arc length is short, the spatter is large, and there are many interference factors, so the processing of the sampled signal is very important, so the hardware such as Figure 4 2 Butterworth low-pass filters connected in series for hardware filtering. See Figure 4 , The rest is the same as the above embodiment.

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Abstract

The invention discloses a real-time tracking control method for a magnetically controlled arc sensing welding seam in gas metal shielded welding, which belongs to a welding control technology. It mainly solves the problems of complex structure, high cost, unstable performance, and poor real-time performance of the existing MIG shielded welding seam tracking system. The key points of its technical scheme are: it includes a magnetically controlled arc sensor, a welding system composed of a welding torch and a welding power supply, a control system, a set of cross carriages and a wheeled robot, and a tracking actuator. The magnetically controlled arc sensor is directly installed on the welding torch of MIGMAW, and collects the lateral and height deviation information of the weld. After signal processing, it is sent to the computer for software processing, and the tracking actuator is controlled in real time to automatically track the weld. This technology realizes the automatic seam tracking of metal gas shielded welding. The magnetron arc sensor is installed on the welding torch of the metal gas shielded welding, without pre- and post-position problems, and has the characteristics of good real-time performance, low cost, high stability and accuracy.

Description

Technical field [0001] The invention relates to welding control technology, in particular to a welding seam automatic tracking technology used for MIG welding. Background technique [0002] MIG welding has been widely used in actual production due to its high efficiency, energy saving, simple and convenient operation, and has become an alternative process for manual arc welding. The main problem to be solved to realize the automatic control of the welding process is the automatic tracking of the welding seam. At present, most of the welding seam tracking sensors used for MIG welding are mechanical arc sensors and laser sensors. Mechanical arc sensors use the arc itself as the sensor, which has strong real-time performance and good flexibility and accessibility of the torch movement. The cost is low, but the volume is large, the noise is large, easy to wear, and the control accuracy is not high. Although the laser sensor has a relatively high control accuracy, its cost is high a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/127B23K9/173
Inventor 洪波来鑫洪宇翔尹力魏复理
Owner XIANGTAN UNIV
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