Cleaning and welding integration device for black volume endless rolling

An endless rolling and post-welding technology, applied in the field of cleaning and welding integrated devices, can solve the problems of inability to realize partial cleaning of black coils, waste liquid environment is easy to cause pollution, and cannot be completely removed, so as to suppress arc root drift and reduce The effect of broken belt risk and easy balance regulation

Active Publication Date: 2018-12-18
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, further studies have shown that the above-mentioned prior art still has the following deficiencies or defects: First, although laser cleaning is performed on the surface of the workpiece to be processed, it is for the cleaning of finished parts and does not involve welding and post-weld cleaning processes, and The entire equipment is equipped with cameras and infrared detectors, which makes the system complex, high equipment cost, and slow response time, and is not suitable for harsh on-site conditions such as steel enterprises; secondly, in the prior art, the entire black coil strip Cleaning is carried out

Method used

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  • Cleaning and welding integration device for black volume endless rolling
  • Cleaning and welding integration device for black volume endless rolling
  • Cleaning and welding integration device for black volume endless rolling

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Experimental program
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Effect test

Embodiment 1

[0048] The workpiece material is 304 austenitic stainless steel black coil with a thickness of 4mm, and the welding method is flat tailor welding.

[0049] In this embodiment, the laser light source is an 8000W fiber laser, the arc heat source is a 320A pulse digitally controlled inert gas welder, and the laser cleaning device is a 500W fiber laser cleaning machine.

[0050] The process parameters of laser cleaning before and after welding in this embodiment are: laser power 300W, cleaning speed 60mm / s, defocus amount 2mm, gas flow 50L / min; the process parameters of laser-arc hybrid welding are: choose ER316L with a diameter of 1.0mm Stainless steel welding wire, shielding gas using Ar+2.5% CO 2 Mixed gas, the gas flow rate is 25L / min, the angle between the vertical laser beam and the arc welding torch is 30°, the distance between the light wires is 3mm, the defocus of the laser beam is -2mm, the laser power is 4500W, the arc current is 150A, and the welding speed is It is 3....

Embodiment 2

[0053] The workpiece material is black coil of 2Cr13 martensitic stainless steel with a thickness of 6mm, and the welding method is flat tailor welding.

[0054] Laser cleaning and composite welding equipment are consistent with Embodiment 1.

[0055] The process parameters of laser cleaning before and after welding in this embodiment are: laser power 450W, cleaning speed 35mm / s, defocus amount 0mm, gas flow rate 60L / min; the process parameters of laser-arc hybrid welding are: choose ER310L with a diameter of 1.0mm Stainless steel welding wire, shielding gas using Ar+2.5% CO 2Mixed gas, the gas flow rate is 20L / min, the angle between the vertical laser beam and the arc welding torch is 40°, the distance between the light wires is 2mm, the defocus of the laser beam is -2mm, the laser power is 7000W, the arc current is 215A, the welding speed It is 2.1m / min.

[0056] The welding process using the above process parameters is stable, and the welding speed has been increased from...

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Abstract

The invention belongs to the technical field of hybrid welding and discloses a cleaning and welding integration device for black volume endless rolling. The cleaning and welding integration device comprises a hybrid welding module and a laser cleaning module. Hybrid heat source is formed by the hybrid welding module through laser and electric arc, and the hybrid heat source and the hybrid weldingmould cooperate on the surface of black coil steel to be welded to trigger the molten pool, meanwhile, the laser attracts the electric arc so that drift of arc root of the electric arc can be restrained; the laser cleaning module is used for partial cleaning of the upper and lower surfaces before and after welding of the joint of the black coil steel ; the hybrid welding module and the laser cleaning module are both arranged on the same support, and a integrative structure of cleaning-welding-cleaning is formed, therefore, that on-line cleaning and welding are conducted simultaneous is achieved. The invention further discloses a welding method of the cleaning and welding integration device for black volume endless rolling. According to the cleaning and welding integration device for the black volume endless rolling, metallurgical defects of air holes, inclusion and incomplete fusion in the welding process are prevented efficiently, seam quality and smooth after welding in the hybrid welding process are guaranteed, efficiency and stability of endless rolling are improved, and risk of strip breakage is reduced.

Description

technical field [0001] The invention belongs to the technical field of composite welding, and more specifically relates to an integrated cleaning and welding device used in endless rolling of black coils. Background technique [0002] In the industry, semi-finished steel coils without pickling, descaling and other follow-up processes are called black coils, otherwise they are white coils. Endless rolling is to weld the first and last two black coils on the middle roller table, and continuously feed them into the rolling mill. , so as to realize a technology of continuous rolling, since the rolling tension in the whole process remains unchanged, the production rhythm is greatly improved, and it is widely used in the production of steel products. [0003] Compared with white coils, black coils have thicker oxide scales on the upper and lower surfaces. On the one hand, the oxide scales with different thicknesses greatly affect the stability of the black coil welding process. On...

Claims

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Application Information

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IPC IPC(8): B23P23/04B23K26/348B08B7/00
Inventor 高明龚梦成曾晓雁郝康达陆洋肖雄
Owner HUAZHONG UNIV OF SCI & TECH
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