Control method for pulse direct-current hybrid welding and storage medium

Abstract

The invention discloses a control method for pulse direct-current hybrid welding and a storage medium, and belongs to the technical field of welding control. The control method comprises the following steps: setting parameters according to a feedback current average value, a feedback voltage average value and a pulse welding stage setting parameter of the pulse welding stage, and a feedback current average value, a feedback voltage average value and a direct current welding stage initial setting parameter of the direct current welding stage; adjusting parameters of the direct-current welding stage and adjusting parameters of the pulse welding stage are obtained through calculation, and adjusting values of waveform parameters of the pulse welding stage and the direct-current welding stage are obtained through continuous processing according to the adjusting parameters. The feedback voltage and the feedback current in the welding process are collected, multiple times of parameter processing are carried out, real-time and accurate adjustment of the pulse welding stage and the direct-current welding stage is achieved, and the stability of the welding process can be effectively guaranteed.

Description

Technical Field

[0001] This application relates to the field of welding control technology, specifically to a control method and storage medium for pulsed DC hybrid welding. Background Technology

[0002] With the development of welding technology, gas metal arc welding (GMAW) is increasingly used in actual welding operations, and the technology is becoming more and more mature. Commonly used GMAW methods include pulse welding and direct current welding. Pulse welding has a high arc heat, suitable for welding medium and thick plates. Taking a 1.2mm diameter carbon steel welding wire as an example, the commonly used welding current range is approximately 140A-260A. Direct current welding, on the other hand, has a lower arc heat, suitable for welding relatively thinner materials. Taking a 1.2mm diameter carbon steel welding wire as an example, the commonly used welding current range is approximately 80A-160A. The welding method used varies depending on the location of the weld. For example, vertical welding and butt joint root passes mostly use direct current welding, while fillet welding is more commonly done using pulse welding.

[0003] During welding, when workpiece deformation or poor workpiece assembly occurs, the wire extension length (the "tether extension") changes, causing deviations in the actual feedback current and voltage compared to the set values. When the wire extension length increases, the arc is momentarily elongated, resulting in a higher feedback voltage than the set value. Without adjustment, this increases the heat input, potentially leading to defects such as undercut and burnt contact tip. Conversely, when the wire extension length decreases, the arc is compressed, the feedback voltage decreases, and the heat input decreases, potentially causing problems such as incomplete wire melting and arc interruption. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a control method and storage medium for pulsed DC hybrid welding, which adjusts the pulsed DC waveform parameters in real time according to the set parameters and feedback parameters to ensure welding stability.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0006] In a first aspect, the present invention provides a control method for pulsed DC hybrid welding, comprising:

[0007] Set the initial settings parameters for the pulse welding stage and the DC welding stage;

[0008] The average value of the feedback current and the average value of the feedback voltage during the pulse welding stage are calculated.

[0009] Based on the average value of the feedback current, the average value of the feedback voltage, and the set parameters of the pulse welding stage, the adjustment parameters of the DC welding stage are calculated.

[0010] Calculate the average value of the feedback current and the average value of the feedback voltage during the DC welding stage;

[0011] Based on the average value of the feedback current, the average value of the feedback voltage, and the initial setting parameters of the DC welding stage, the adjustment parameters of the pulse welding stage are calculated.

[0012] Based on the adjustment parameters and initial settings of the pulse welding stage, as well as the adjustment parameters and initial settings of the DC welding stage, the adjustment values ​​of the waveform parameters for the pulse welding stage and the DC welding stage are calculated.

[0013] Furthermore, the initial setting parameters for the pulse welding stage and the initial setting parameters for the DC welding stage specifically include:

[0014] Initial settings for pulse welding stage: set current Setting voltage Set time ;

[0015] Initial settings for DC welding: Setting current Setting voltage Set time .

[0016] Furthermore, the adjustment parameters for the DC welding stage are calculated based on the average feedback current, average feedback voltage, and pulse welding stage setting parameters, as expressed by the following formula:

[0017] ;

[0018] in, This indicates the adjusted holding time during the DC welding stage. This represents the average feedback current during the pulse welding phase. This represents the average feedback voltage during the pulse welding phase.

[0019] Furthermore, the adjustment parameters for the pulse welding stage are calculated based on the average feedback current, average feedback voltage, and initial setting parameters of the DC welding stage, as expressed by the following formula:

[0020] ;

[0021] in, This represents the adjustment coefficient for the average feedback voltage change during the DC welding stage. This represents the adjustment coefficient for the average feedback current variation during the DC welding stage. This indicates the adjusted holding time during the pulse welding phase.

[0022] Furthermore, the step of calculating the adjustment values ​​of the waveform parameters for the pulse welding stage and the DC welding stage based on the adjustment parameters and initial setting parameters for the pulse welding stage, and the adjustment parameters and initial setting parameters for the DC welding stage, specifically includes:

[0023] The holding time was adjusted according to the pulse welding stage. With set time The deviation, and the holding time after adjustment during the DC welding stage. With set time The deviation is used to calculate and obtain the adjustment values ​​of waveform parameters for the pulse welding stage and the DC welding stage.

[0024] Furthermore, the waveform parameters include: pulse welding peak current, pulse welding base current, and DC welding arc descent slope.

[0025] Furthermore, the calculation formula for the peak current adjustment value of pulse welding is expressed as follows:

[0026] ;

[0027] in, This represents the adjustment factor for the peak current caused by changes in the duration of the pulse welding phase. This represents the adjustment factor for peak current caused by changes in the holding time during the DC welding stage. This indicates the set peak current. This indicates the adjusted peak current.

[0028] Furthermore, the calculation formula for the pulse welding base current adjustment value is expressed as follows:

[0029] ;

[0030] in, The adjustment factor for the base current to account for the change in the duration of the pulse welding phase; The adjustment factor for the base current to account for the change in holding time during the DC welding stage; This indicates the set base current. This represents the adjusted base current.

[0031] Furthermore, the calculation formula for the DC welding arc descent slope adjustment value is expressed as follows:

[0032] ;

[0033] in, This represents the adjustment coefficient for the arc descent slope caused by the change in the holding time during the DC welding phase. This represents the adjustment coefficient for the arc descent slope caused by changes in the duration of the pulse welding phase. This indicates the set arc descent slope. This indicates the adjusted arc descent slope.

[0034] In a second aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the methods described above.

[0035] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0036] This invention provides a control method and storage medium for pulsed DC hybrid welding. Based on the average feedback current and voltage values ​​of the pulsed welding stage, the set parameters of the pulsed welding stage, the average feedback current and voltage values ​​of the DC welding stage, and the initial set parameters of the DC welding stage, adjustment parameters for the pulsed welding stage are calculated. After multiple data processing steps, adjustment values ​​for the waveform parameters of the pulsed welding stage and the DC welding stage are obtained. By closely monitoring the feedback voltage and current during the welding process and employing rigorous parameter processing, this invention achieves real-time and accurate adjustment of the pulsed welding stage and the DC welding stage, effectively ensuring the stability of the welding process. Attached Figure Description

[0037] Figure 1 This is a flowchart of a pulsed DC hybrid welding control method provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the pulsed DC hybrid welding waveform in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the pulse welding waveform in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of DC welding waveforms in an embodiment of the present invention. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Example 1

[0045] Please see Figure 1 This embodiment describes a control method for pulsed DC hybrid welding, including the following steps:

[0046] S100, Set welding parameters: Set the pulse welding stage parameters and DC welding stage parameters.

[0047] Specifically, the parameters to be set include: the set current for the pulse welding stage. The set voltage during the pulse welding stage The set time for the pulse welding stage The set current during the DC welding stage Setting voltage during DC welding stage Setting time for DC welding stage .

[0048] S200: Detect and calculate the average value of the feedback current and the average value of the feedback voltage during the pulse welding stage.

[0049] S300, Adjust DC welding stage parameters;

[0050] Specifically, the average feedback voltage during the pulse welding stage is detected and calculated. With feedback average current The holding time F_B of the DC welding stage is adjusted by the deviation between the feedback current / voltage and the set current / voltage, as expressed by the following formula:

[0051] ;

[0052] in, This represents the adjustment coefficient for the average voltage variation during the pulse welding stage. This represents the adjustment coefficient for the average current variation during the pulse welding stage.

[0053] S400: Detect and calculate the average value of the feedback current and the average value of the feedback voltage during the DC welding stage;

[0054] S500, Adjust the parameters for the pulse welding stage;

[0055] Specifically, the average feedback voltage during the DC welding stage is detected and calculated. With feedback average current The duration of the pulse welding phase is adjusted by monitoring the deviation between the feedback current / voltage and the set current / voltage. The formula is expressed as follows:

[0056] ;

[0057] in, This represents the adjustment coefficient for the average feedback voltage change during the DC welding stage. This represents the adjustment coefficient for the average feedback current change during the DC welding stage.

[0058] S600: Based on the adjustment parameters and initial setting parameters of the pulse welding stage, and the adjustment parameters and initial setting parameters of the DC welding stage, calculate the adjustment values ​​of the waveform parameters for the pulse welding stage and the DC welding stage.

[0059] Specifically, the time is adjusted based on the pulse welding stage and the DC welding stage. , With set time , To address the deviation, the waveform parameters at each stage are adjusted. These waveform parameters include the pulse welding peak current, the pulse welding base current, and the DC welding arc descent slope.

[0060] Please refer to Figure 2 , Figure 3 and Figure 4 It should be noted that... Figure 1As shown in the figure, it is divided into two parts: stage A and stage B. Stage A is either pulse welding or DC welding, and stage B is either DC welding or pulse welding. Stages A and B constitute a complete welding output stage. Within this stage, A and B can be the same welding method or different welding methods. In this embodiment, pulse welding in stage A and DC welding in stage B are used as an example for explanation. The main parameters involved include the duration of stages A and B, the duty cycle of stage B in the total stage, and the total time of stages A and B, which is also the current transition frequency of one stage. The pulse welding waveform in stage A involves several main parameters, such as peak current, base current, peak time, rise and fall time, and slope. Figure 3 As shown. The main parameters involved in the DC welding waveform in stage B include the rising slope during the short-circuit phase. , And the decreasing slope Ki during the arcing phase, such as Figure 4 As shown.

[0061] More specifically, the formula for calculating the adjustment value of the pulse welding peak current is as follows:

[0062] ;

[0063] in, This represents the adjustment factor for the peak current in relation to the duration of the pulse welding phase. This represents the adjustment factor for the peak current as the holding time changes during the DC welding phase. IP_A indicates the set peak current magnitude. This indicates the adjusted peak current.

[0064] The formula for calculating the adjustment value of the pulse welding base current is as follows:

[0065] ;

[0066] in, The adjustment factor for the base current to account for the change in the duration of the pulse welding phase; The adjustment factor for the base current to account for the change in holding time during the DC welding stage; This indicates the set base current value. This represents the adjusted base current.

[0067] The formula for calculating the adjustment value of the arc descent slope in DC welding is as follows:

[0068] .

[0069] in, This represents the adjustment coefficient for the arc descent slope caused by the change in the holding time during the DC welding phase. This represents the adjustment coefficient for the arc descent slope caused by changes in the duration of the pulse welding phase. This indicates the magnitude of the set arc descent slope. This indicates the magnitude of the adjusted arc descent slope.

[0070] It should be added that the above content only lists the adjustment methods of the main parameters for pulse welding and DC welding. Other parameters may also be adjusted during the welding process. This concludes the control method of the present invention.

[0071] Example 2: This example provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the methods described in Example 1.

[0072] Example 3: This example provides a computer device, including:

[0073] Memory, used to store computer programs / instructions;

[0074] A processor for executing the computer program / instructions to implement the steps of any of the methods described in Embodiment 1.

[0075] Example 4: This example provides a computer program product, including a computer program / instructions, which, when executed by a processor, implement the steps of the method described in any one of Examples 1.

[0076] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

[0077] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0078] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0079] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0080] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit its protection scope. Although this disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading this disclosure, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims.

Claims

1. A control method for pulsed DC hybrid welding, characterized in that, include: Set the initial settings parameters for the pulse welding stage and the DC welding stage; The average value of the feedback current and the average value of the feedback voltage during the pulse welding stage are calculated. Based on the average value of the feedback current, the average value of the feedback voltage, and the set parameters of the pulse welding stage, the adjustment parameters of the DC welding stage are calculated. Calculate the average value of the feedback current and the average value of the feedback voltage during the DC welding stage; Based on the average value of the feedback current, the average value of the feedback voltage, and the initial setting parameters of the DC welding stage, the adjustment parameters of the pulse welding stage are calculated. Based on the adjustment parameters and initial settings of the pulse welding stage, as well as the adjustment parameters and initial settings of the DC welding stage, the adjustment values ​​of the waveform parameters for the pulse welding stage and the DC welding stage are calculated.

2. The control method for pulsed DC hybrid welding according to claim 1, characterized in that, The initial setting parameters for the pulse welding stage and the initial setting parameters for the DC welding stage specifically include: Initial settings for pulse welding stage: Setting current Setting voltage Set time ; Initial settings for DC welding: Setting current Setting voltage Set time .

3. The control method for pulsed DC hybrid welding according to claim 2, characterized in that, The adjustment parameters for the DC welding stage are calculated based on the average feedback current, average feedback voltage, and pulse welding stage setting parameters, as expressed by the following formula: ； in, This indicates the adjusted holding time during the DC welding stage. This represents the average feedback current during the pulse welding phase. This represents the average feedback voltage during the pulse welding stage.

4. The control method for pulsed DC hybrid welding according to claim 3, characterized in that, The adjustment parameters for the pulse welding stage are calculated based on the average feedback current, average feedback voltage, and initial settings of the DC welding stage. The formula is as follows: ； in, This represents the adjustment coefficient for the average feedback voltage change during the DC welding stage. This represents the adjustment coefficient for the average feedback current variation during the DC welding stage. This indicates the adjusted holding time during the pulse welding phase.

5. The control method for pulsed DC hybrid welding according to claim 4, characterized in that, The step of calculating the adjustment values ​​of waveform parameters for the pulse welding stage and the DC welding stage based on the adjustment parameters and initial setting parameters for the pulse welding stage, and the adjustment parameters and initial setting parameters for the DC welding stage, specifically includes: The holding time was adjusted according to the pulse welding stage. With set time The deviation, and the holding time after adjustment during the DC welding stage. With set time The deviation is used to calculate and obtain the adjustment values ​​of waveform parameters for the pulse welding stage and the DC welding stage.

6. The control method for pulsed DC hybrid welding according to claim 5, characterized in that, The waveform parameters include: pulse welding peak current, pulse welding base current, and DC welding arc descent slope.

7. The control method for pulsed DC hybrid welding according to claim 6, characterized in that, The formula for calculating the peak current adjustment value in pulse welding is as follows: ； in, This represents the adjustment factor for the peak current caused by changes in the duration of the pulse welding phase. This represents the adjustment factor for peak current caused by changes in the holding time during the DC welding stage. This indicates the set peak current. This indicates the adjusted peak current.

8. The control method for pulsed DC hybrid welding according to claim 6, characterized in that, The formula for calculating the pulse welding base current adjustment value is as follows: ； in, The adjustment factor for the base current to account for the change in the duration of the pulse welding phase; The adjustment factor for the base current to account for the change in holding time during the DC welding stage; This indicates the set base current. This represents the adjusted base current.

9. The control method for pulsed DC hybrid welding according to claim 6, characterized in that, The formula for calculating the DC welding arc descent slope adjustment value is as follows: ； in, This represents the adjustment coefficient for the arc descent slope caused by the change in the holding time during the DC welding phase. This represents the adjustment coefficient for the arc descent slope caused by changes in the duration of the pulse welding phase. This indicates the set arc descent slope. This indicates the adjusted arc descent slope.

10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the steps of the method as described in any one of claims 1 to 9.

Images