CN201116976Y - On-line monitoring and process parameter optimization system of aluminum alloy welding process - Google Patents

Abstract

The utility model discloses an on-line monitoring and process parameter optimization system of an aluminum alloy welding process. The signal output end of the visual sensor is connected to the signal input end of the image acquisition card, the signal output end of the image acquisition card is connected to the image information input end of the industrial computer, the offset signal output end of the industrial computer is connected to the signal input end of the stepping motor Connection, the mechanical control end of the stepping motor and the mechanical control end of the welding torch are mechanically fixedly connected, the welding parameter signal output end of the industrial computer is connected to the signal input end of the welding power supply, and the power output end of the welding power supply is connected to the power input end of the welding torch . In the welding process of aluminum alloy fusion welding, the utility model can automatically make optimized and precise control on the position of the welding torch and welding parameters according to the specific conditions, which can not only realize the high-quality welding process, but also significantly improve the welding quality; it can also realize automation, Reduce the impact of human factors and reduce costs.

Description

On-line monitoring and process parameter optimization system of aluminum alloy welding process

technical field

The utility model relates to an on-line monitoring and process parameter optimization system of an aluminum alloy fusion welding process, which belongs to the field of aluminum alloy welding processing.

Background technique

As a high-efficiency welding method, aluminum alloy fusion welding has been widely used in the production of aviation and aerospace products. In the production of aviation and aerospace products, a small defect may bring about a huge disaster, but in actual operation, the smoothness, angle and gap between the edges of the aluminum plate materials to be welded are not exactly the same In the past, welding was performed according to the same welding parameters and welding torch position, or judged by the experience of the technician, and the welding parameters and welding torch position were properly adjusted during the welding process, so that the welding quality could not be fundamentally changed, and the efficiency was low , if the quality is unqualified and reworked, it will not only take time and effort, but also increase the cost. There is still no effective device to solve the above problems, including academic papers, patent documents, etc., and there are no reports of relevant solutions.

Contents of the invention

The purpose of this utility model is to provide an on-line monitoring and process parameter optimization system of the aluminum alloy welding process that can effectively improve the welding quality in order to solve the above problems.

The utility model realizes the above-mentioned purpose through the following technical solutions:

In the utility model, the signal output end of the visual sensor is connected with the signal input end of the image acquisition card, the signal output end of the image acquisition card is connected with the image information input end of the industrial computer, and the offset signal output end of the industrial computer is connected with the stepper The signal input terminal of the motor is connected, the mechanical control terminal of the stepping motor is connected mechanically with the mechanical control terminal of the welding torch, the welding parameter signal output terminal of the industrial computer is connected with the signal input terminal of the welding power supply, and the power output terminal of the welding power supply is connected with the welding torch connected to the power input terminal.

During the operation, the visual sensor is used to detect the groove geometry and gap information of the aluminum alloy to be welded online in real time and convert it into an electrical signal, which is converted into image information by the image acquisition card and then transmitted to the industrial computer.

Next, the industrial computer first accurately calculates the groove geometry and gap information in the image information, and then accurately calculates the position of the welding torch according to the preset scheme in the knowledge base, and outputs the offset signal. The signal is converted into mechanical motion by the stepper motor (its mechanical motion is realized by the cross slider), and then the position of the welding torch is precisely controlled (generally, it is precisely aligned with the middle position of the gap between the aluminum alloy plates); at the same time, the industrial control According to the preset welding parameter model, the machine optimizes the online real-time welding parameters with the preset size and consistency of the weld seam as the optimization goal, and outputs the optimized welding including arc voltage, welding current and wire feeding speed Parameter signal, the welding parameter signal is converted by the welding power supply to realize the precise control of the welding parameters (ie arc voltage, welding current and wire feeding speed) of the welding torch.

As a preferred mode of the present invention, the visual sensor mainly includes a laser and a photoelectric converter. The system adopts real-time laser imaging measurement technology, which has the advantages of rapidity and precision.

The industrial computer is also connected with a keyboard, a mouse and a display through a data transmission line. In this way, man-machine communication can be realized, and it is also convenient for the industrial computer to build a welding database including process parameter matching information, groove state information, defect feature information, and quality statistics information according to the instructions issued by the operator during the operation process, and store all the information. The above-mentioned welding database is stored to support the online parameter optimization of the welding process and the quality monitoring of weld seam formation, and form the "recordable" and "traceable" management capabilities of the processing process and quality of important welding products.

The beneficial effects of the utility model are:

As can be seen from the above, since the utility model can automatically perform optimized and precise control on the position of the welding torch and welding parameters according to specific conditions during the fusion welding process of aluminum alloy, it can realize high-quality welding process and greatly improve the welding quality ; It can also realize automation, reduce the influence of human factors and reduce costs.

Description of drawings

Accompanying drawing is the system construction block diagram of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in the accompanying drawing, the signal output end of the visual sensor is connected with the signal input end of the image acquisition card, the signal output end of the image acquisition card is connected with the image information input end 2 of the industrial computer, and the offset signal output end 5 of the industrial computer It is connected with the signal input end of the stepping motor, the mechanical control end of the stepping motor is mechanically fixedly connected with the mechanical control end 8 of the welding torch, the welding parameter signal output end 3 of the industrial computer is connected with the signal input end of the welding power source, and the welding power source The power output end is connected with the power input end 6 of the welding torch, and 1 is an aluminum alloy plate.

The visual sensor mainly includes a laser and a photoelectric converter (that is, the CCD in the figure). The system adopts real-time laser imaging measurement technology, which has the advantages of rapidity and precision.

The industrial computer is also connected with the keyboard, mouse and monitor through the data transmission line. In this way, man-machine communication can be realized, and it is also convenient for the industrial computer to build a welding database including process parameter matching information, groove state information, defect feature information, and quality statistics information according to the instructions issued by the operator during the operation process, and store all the information. The above-mentioned welding database is stored to support the online parameter optimization of the welding process and the quality monitoring of weld seam formation, and form the "recordable" and "traceable" management capabilities of the processing process and quality of important welding products.

During the operation, the visual sensor is used to detect the groove geometry of the edge of the aluminum alloy plate 1 to be welded in real time and the gap information between the two aluminum alloy plates 1 to be welded and convert it into an electrical signal. The image information is converted into image information by the image acquisition card, and then transmitted to the CPU of the industrial computer through the image information input terminal 2 of the industrial computer.

Next, the CPU of the industrial computer first accurately calculates the groove geometry and gap information in the image information, and then accurately calculates the position of the welding torch according to the preset scheme in the knowledge base, and outputs the offset signal. The amount signal is transmitted to the stepper motor through the offset signal output terminal 5, and the stepper motor converts the received signal into mechanical movement (the mechanical movement is realized by the cross slider), and then through the connection with the mechanical control terminal 8 of the welding torch Accurately control the position of the welding torch (generally, to accurately align the middle position of the gap between the aluminum alloy plates 1); at the same time, the industrial computer uses the preset size of the weld shape and its Consistency is the optimization goal, optimize the online real-time welding parameters, and output the optimized welding parameter signals including arc voltage, welding current and wire feeding speed, this welding parameter signal is transmitted to the welding power source through the welding parameter signal output terminal 3 At the signal input end, the welding power supply converts it into a specific power figure and then controls the welding torch's welding parameters (ie, arc voltage, welding current and wire feeding speed) precisely.

Claims (3)

1, a kind of on-line monitoring of process of aluminium alloy fusion welding and parameters Optimization system, it is characterized in that: the signal output part of vision sensor is connected with the signal input part of image pick-up card, the signal output part of image pick-up card is connected with the image information input end (2) of industrial computer, the offset signal output terminal (5) of industrial computer is connected with the signal input part of stepper motor, the mechanical control end of stepper motor adopts mechanical fixation to be connected with the mechanical control end (8) of welding gun, the welding parameter signal output terminal (3) of industrial computer is connected with the signal input part of the source of welding current, and the power output end of the source of welding current is connected with the power input of welding gun (6).

2, the on-line monitoring of process of aluminium alloy fusion welding according to claim 1 and parameters Optimization system, it is characterized in that: described vision sensor mainly comprises laser instrument and photoelectric commutator.

3, the on-line monitoring of process of aluminium alloy fusion welding according to claim 1 and parameters Optimization system is characterized in that: described industrial computer also is connected with keyboard, mouse, display by data line.

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