Automatic tracking system and method for gas shield welding of straight seam steel pipe pre-welding machine

An automatic tracking and pre-welding machine technology, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of poor anti-interference, achieve high anti-interference, perfect welding bead line, high reference value and promotion value effect

Active Publication Date: 2021-12-31
SINOPEC OILFIELD EQUIP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an automatic tracking system and method for gas-shielded welding of a straight seam steel pipe pre-welding machine, which can better identify the center of the weld, control the gas-shielded welding torch to track the center of the weld, and exhibit high resistance to arc spatter. Interference, can successfully solve the problem of welding deviation caused by the poor anti-interference of the imported tracking system
[0005] The invention provides an automatic tracking system and method for gas shielded welding of a straight seam steel pipe pre-welding machine, which solves another problem of being able to calculate the groove parameters and welding torch offset, and automatically start welding through the driving system and automatically carry out the welding process. Welding torch position adjustment to avoid welding deviation caused by tube billet movement during welding

Method used

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  • Automatic tracking system and method for gas shield welding of straight seam steel pipe pre-welding machine
  • Automatic tracking system and method for gas shield welding of straight seam steel pipe pre-welding machine
  • Automatic tracking system and method for gas shield welding of straight seam steel pipe pre-welding machine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as Figure 1-2 Among them, a straight seam steel pipe pre-welding machine gas shielded welding automatic tracking system and method, including a drive system, the drive system includes a drive card 2 in a host 1, a drive mechanism 5, a welding torch bracket 7, a welding torch 8 and a visual sensor 9, the host The driving card 2 in 1 is connected to the driving mechanism 5 through the signal line, and the driving mechanism 5 is connected to the welding gun bracket 7, and the welding gun 8 and the visual sensor 9 are arranged on the welding gun bracket 7. With this structure, the system does not need an arc shield, and exhibits high anti-interference to arc spatter, which can successfully solve the problem of welding deviation caused by the poor anti-interference of imported tracking systems, and the tracking system has The linkage control function of equipment such as welding machines and conveyor drag chains has the advantage of one-button convenient operation.

...

Embodiment 2

[0061] Further illustrate in conjunction with embodiment 1, as Figure 1-7 As shown, the method is: the laser stripe emitted by the laser emitter 901 of the visual sensor 9 hits the pre-welding groove 10, and the visual camera 902 transmits the image mixed with the arc light and the laser groove to the acquisition card 3; The image acquisition and display module 101 in the arc light is processed to obtain a clean groove image, and the calculation algorithm module 102 calculates the lowest point of the groove; the welding wire stretched out by the welding torch 8 is adjusted to the lowest point of the groove, remembering the groove center Position; the signal card 4 sends a driving signal to the welding machine control board 12 and the conveying frequency converter 13, the welding machine control board 12 controls the welding machine 6 to weld the tube blank 11, the conveying frequency converter 13 starts the conveying device 15 to rotate, and drives the tube blank 11 to move I...

Embodiment 3

[0063] Further illustrate in conjunction with embodiment 1, as Figure 3-4 As shown, the function of the neighborhood mean filter is to reduce image noise, realize image smoothing, and weaken and suppress most noise, such as noise caused by arc light and transmission channel. The basic idea is to perform template operation on the image matrix with the help of an average template, and replace the gray level of each pixel with the average value of several pixel gray levels. The mathematical expression is:

[0064]

[0065] In the above formula: f(x,y)-M×N pixel image; s-neighborhood set centered on (x,y), but including (x,y) points; F(x,y)- The image obtained after filtering; the total number of coordinate points in the M-set.

[0066] It can be seen from the above formula that the filtered image set is F(x, y), and the gray level of each pixel is determined by the average gray level of several pixels included in the predetermined neighborhood of f(x, y). of.

[0067] Her...

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Abstract

The invention provides an automatic tracking system and method for gas shield welding of a straight seam steel pipe pre-welding machine. The automatic tracking system comprises a driving system, the driving system comprises a driving card, a driving mechanism, a welding gun support, a welding gun and a visual sensor which are arranged in a host, the driving card in the host is connected with the driving mechanism through a signal line, and the driving mechanism is connected with the welding gun support; and the welding gun and the visual sensor are arranged on the welding gun support. The automatic tracking system can better identify the center of a welding seam and control the gas shield welding gun to follow up to trace the center of the welding seam, the line type of a welding bead after welding is perfect, and the system does not need an arc light shielding cover, shows higher anti-interference performance on arc light splashing, and can successfully solve the problem of welding deviation caused by poor arc light anti-interference performance of an imported tracking system; and the tracking system has a linkage control function with equipment such as a peripheral welding machine and a conveying drag chain, and has the advantage of one-button convenient operation. The system and method have high reference value and popularization value in the straight seam type oil and gas welded pipe industry.

Description

technical field [0001] The invention relates to the field of electrical automation, in particular to an automatic tracking system and method for gas shielded welding of a straight seam steel pipe pre-welding machine. Background technique [0002] The straight seam welded pipe pre-welding machine is a device for pre-welding the straight seam open pipe blank. It uses CO2 and Ar mixed gas shielded welding. Due to the inherent characteristics of gas shielded welding, the welding arc spatters a lot. During the welding process, if No gas shielded welding automatic tracking system requires the operator to wear goggles and anti-scalding gloves to touch the pre-welded seam near the welding torch, and feel the relative offset of the pre-welded seam in the groove center based on experience. Manually adjust the position of the welding torch in time, and the quality of the pre-weld seam is difficult to guarantee. At present, the gas shielded welding tracking system of a pre-welding mach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/127B23K9/12B23K9/32
CPCB23K9/173B23K9/124B23K9/12B23K9/1274B23K9/32Y02P90/02
Inventor 陈亮蔡绪明闵建东张新芳陈军蒲麟蔡小青张晓强沈祎军周光杰
Owner SINOPEC OILFIELD EQUIP CORP
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