Laser-electric arc composite welding real-time regulation and control system and regulation and control method thereof

A hybrid welding and real-time control technology, applied in the field of material engineering, can solve problems such as lack of fusion, burn-through, and incomplete penetration

Active Publication Date: 2017-06-13
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention designs a real-time control system and control method for laser-arc hybrid welding, so as to realize the precise control of the high-speed welding process of complex structures and solve the problems of burn-through, Welding defects such as lack of fusion and incomplete penetration, so that high-performance and high-quality welded joints can be obtained in the high-speed and complex structure welding process

Method used

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  • Laser-electric arc composite welding real-time regulation and control system and regulation and control method thereof
  • Laser-electric arc composite welding real-time regulation and control system and regulation and control method thereof
  • Laser-electric arc composite welding real-time regulation and control system and regulation and control method thereof

Examples

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example 1

[0034] Example 1: Irregular straight line structure welding

[0035] like figure 2 Shown is an irregular long straight weld that approximates a straight line. In a large number of actual engineering structures, with the increase of the actual structure length, the straight weld shows obvious irregularities in the welding manufacturing process, and because the specimen is larger In actual engineering manufacturing, the method similar to robot trial teaching has significantly affected the welding efficiency. To address the above problems, use the visual sensor of the welding process of the present invention to initially obtain the macroscopic structure of the actual test piece, collect the structural shape of the test piece to be welded in the real-time welding process, and determine a reasonable welding path according to the actual gap between the plate groups. Due to the large gaps in the plates, the single use of weld seam tracking cannot effectively solve the problem of la...

example 2

[0040] Example 2: Welding of complex space structures

[0041] like image 3 Shown is a complex elliptical space surface structure, which is basically manufactured by segmented welding in the traditional welding manufacturing process. Discontinuous welds affect the efficiency and quality of welding manufacturing to a certain extent. However, in order to realize the continuous welding of this structure, the test piece itself needs to cooperate with the movement. The welding process is the combination of the rotating movement of the test piece and the curved movement of the welding torch. Since the actual components are not completely symmetrical, the During the manufacturing process, the linear speed of the welding torch will also change with the movement of the test piece, and the coordinated control between the welding curve and the speed must be realized during actual welding. Not only that, in actual welding, the angle between the laser-arc hybrid welding torch and the tes...

example 3

[0045] Example 3: Penetration welding of T-shaped structural parts

[0046] Titanium alloy T-shaped structure (such as Figure 4 (shown) that is, the penetration welding of the wall plate and rib structure is mainly arc welding at first. During the welding process, the single arc welding current is very large, and the welded structural parts are obviously deformed under the condition of large heat input. have a significant impact. The present invention can change the energy state of the heat source formed between the laser and the arc by adjusting the angle between the laser and the electric arc and changing the angle α between the laser and the electric arc, thereby significantly improving the overall penetration of the heat source. Aiming at the problems of poor welding penetration energy, slow speed and large deformation in the arc welding process, the present invention focuses on the regulation of the following aspects:

[0047] ①The welding heat source, according to the...

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Abstract

The invention discloses a laser-electric arc composite welding real-time regulation and control system and a regulation and control method thereof. The regulation and control system comprises a laser-arc composite welding heat source system, a sensing system, a welding data collection system, a control unit, a control signal output system and a welding mechanical-movement control system. According to the laser-electric arc composite welding real-time regulation and control system and the regulation and control method thereof, information is collected through the sensing system, is input to the welding data collection system and is converted into respective digital signals, the digital signals are input into a data collection module of a control unit and are input into a human-computer interaction module through classification, the simple digital signals are converted into referable relative variable signals, then the relative variable signals are input into an intelligent module to be calculated, when the calculated result data deviates from a set range of the intelligent module, the electric arc current, the laser energy, the movement speed and the like are regulated and controlled in real time so that the welding comprehensive evaluation value is returned to the set range again, and therefore the purposes of stabilizing the welding process and improving the welding quality can be achieved.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and in particular relates to a real-time control technology of a laser-arc composite welding method, in particular to an intelligent control technology of a composite welding process. Background technique [0002] Laser-arc hybrid welding is a new type of hybrid welding method, and its application range gradually expands with the development of this welding method. In recent years, in the fields of aerospace, rail transit and energy equipment manufacturing, the shape of parts manufacturing has become more complex, the manufacturing cycle has gradually shortened, and the requirements for manufacturing quality have continued to increase, which puts forward an urgent demand for high-end welding manufacturing technology. In the process of laser-arc hybrid welding of large and complex structural parts, the conventional welding parameter setting method can realize the welding and manufactu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/70B23K26/348
CPCB23K26/348B23K26/702
Inventor 刘黎明王红阳宋刚张兆栋
Owner DALIAN UNIV OF TECH
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