DC welding control method and device

Abstract

The present invention provides a DC welding control method and device, the method comprising: obtaining the transition time of the molten droplet, determining the molten droplet transition time deviation value based on the preset DC welding standard parameters; if the deviation value exceeds the first preset range, adjusting the arcing stage parameters, re-determining the deviation value, so that the deviation value is within the first preset range; obtaining the arcing time and arcing energy after parameter adjustment, and determining the arcing time deviation value and arcing energy deviation value based on the DC welding standard parameters; adjusting the short-circuit stage parameters according to the arcing time deviation value and the arcing energy deviation value. By adjusting the arcing stage parameters, the molten droplet transition time is reasonable, the arc is stable, and no large spatter is generated; by adjusting the short-circuit stage parameters to match the arcing stage, the force of the wire breaking at the moment of transition is small, and the amount of spatter generated during the welding process is further reduced, thereby reducing the later cleaning, improving the welding efficiency, and improving the welding effect.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and in particular to a direct current welding control method and device. Background Art

[0002] With the development of welding technology, gas shielded arc welding is increasingly used in actual welding operations, and the technology is becoming more and more mature. Among them, DC welding is widely used in various occasions due to its low heat input and easy operation. However, DC welding will produce more spatter in actual use, which will stick to the surface of the workpiece and affect the welding effect. The spatter needs to be cleaned up later, which consumes manpower and material resources and leads to low welding efficiency. Summary of the invention

[0003] The object of the present invention is to provide a direct current welding control method and device with good welding effect and high welding efficiency.

[0004] To achieve the above object, the present invention provides a DC welding control method, which comprises:

[0005] Obtaining a transition time of a molten droplet of DC welding, and determining a molten droplet transition time deviation value of DC welding based on preset DC welding standard parameters;

[0006] If the droplet transfer time deviation value exceeds the first preset range, adjust the arcing stage parameters and redetermine the droplet transfer time deviation value of DC welding so that the redetermined droplet transfer time deviation value is within the first preset range;

[0007] Obtaining the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted, and determining the arcing time deviation value and the arcing energy deviation value based on the preset DC welding standard parameters;

[0008] The short-circuit phase parameters are adjusted according to the arcing time deviation value and the arcing energy deviation value.

[0009] The present invention provides a DC welding control device for improving welding effect and welding efficiency, which includes:

[0010] A first deviation value determination module is used to obtain a transition time of a molten droplet of DC welding, and determine a deviation value of the molten droplet transition time of DC welding based on preset DC welding standard parameters;

[0011] An arcing stage parameter adjustment module, used to adjust the arcing stage parameters and redetermine the droplet transfer time deviation value of DC welding if the droplet transfer time deviation value exceeds the first preset range, so that the redetermined droplet transfer time deviation value is within the first preset range;

[0012] A second deviation value determination module is used to obtain the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted, and determine the arcing time deviation value and the arcing energy deviation value based on the preset DC welding standard parameters;

[0013] The short-circuit stage parameter adjustment module is used to adjust the short-circuit stage parameters according to the arcing time deviation value and the arcing energy deviation value.

[0014] The present invention provides a computer device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the DC welding control method as described above when executing the computer program.

[0015] The present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the DC welding control method as described above is implemented.

[0016] The present invention provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the DC welding control method described above is implemented.

[0017] The embodiment of the present invention obtains the transition time of a molten droplet of DC welding, and determines the molten droplet transition time deviation value of DC welding based on the preset DC welding standard parameters; if the molten droplet transition time deviation value exceeds the first preset range, adjust the arcing stage parameters, and redetermine the molten droplet transition time deviation value of DC welding, so that the redetermined molten droplet transition time deviation value is within the first preset range; obtain the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted, and determine the arcing time deviation value and arcing energy deviation value based on the preset DC welding standard parameters; adjust the short-circuit stage parameters according to the arcing time deviation value and arcing energy deviation value. By adjusting the arcing stage parameters, the molten droplet transition time is reasonable, the arc is stable, and no large spatter is generated; by adjusting the short-circuit stage parameters in coordination with the arcing stage adjustment, the force of the wire breaking at the moment of transition is small, and the amount of spatter generated during the welding process is further reduced, thereby reducing the workload of later cleaning, which not only improves the welding efficiency but also improves the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0019] Figure 1 It is a schematic diagram of a DC welding current waveform;

[0020] Figure 2 Schematic diagram of the implementation process of the DC welding control method according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of a specific implementation process of step 204 in a specific embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the flow of the DC welding control scheme in a specific example of the present invention;

[0023] Figure 5 is a structural schematic diagram of a DC welding control device according to an embodiment of the present invention;

[0024] Figure 6 It is a structural schematic diagram of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0026] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0027] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0028] When using DC welding, the size of the molten droplet formed by the melting of the welding wire will change during the actual welding process due to changes in the dry extension or other welding conditions such as welding voltage, workpiece size, etc. When the molten droplet transitions to the parent material, it will cause arc instability and produce large spatter. To ensure that the welding process is automatically adjusted to remain stable when disturbed by the outside world, and that no large welding spatter is generated. To ensure arc stability and small spatter, the core issue is to ensure the consistency of the droplet size, that is, to maintain the consistency of the transition time of each droplet. The droplet transition time refers to the time from the formation to the shedding of the droplet.

[0029] Therefore, the inventors found that in order to solve the problem of a lot of spatter on the surface after welding, the embodiments of the present invention need to solve two problems existing in DC welding. One is the arc instability caused by external interference such as changes in dry elongation or workpiece size during welding; the other is to reduce the amount of spatter generated during DC welding.

[0030] DC welding consists of an arcing phase and a short-circuiting phase. Figure 1The figure shows a DC welding current waveform. It can be seen from the figure that the short-circuit stage parameters include: short-circuit rising first slope ISL1, short-circuit rising second slope ISL2, short-circuit rising current inflection point value Iac, necking current I_sht, transition time T1 from arcing stage to short-circuit current climbing stage, transition time T2 from short-circuit stage to arcing stage, and short-circuit time T_sht of the entire short-circuit stage, and T1 and T2 are fixed values, T_sht is a variable value. The arcing stage parameters include: arcing maximum current I_arc1, current maximum time T_arc1, electronic reactor downslope Ki and arcing stage maintenance time - arcing time T_arc, I_arc1, T_arc1 and Ki are the three parameters that determine the size of the droplet.

[0031] From the arcing stage, molten droplets are formed, and the size of the molten droplets continues to increase. When the molten droplets contact the base material, they enter the short-circuit control stage. Through two stages of current climb, they quickly enter the necking stage. At this time, the necking current is I_sht, and the molten droplets fall off into the molten pool. At this time, the entire stage from the formation to the falling of a molten droplet is completed. The time required is T_cyc (transition time of a molten droplet), T_cyc=T_sht+T_arc.

[0032] In order to solve the problem of arc instability caused by external disturbances during DC welding, it is necessary to maintain the consistency of droplet transition during welding, that is, the size of the droplets formed should be roughly the same. To achieve this goal, T_cyc should be kept roughly the same in actual welding without sudden increase or decrease, so as to minimize the change of T_cyc.

[0033] In order to reduce the spatter generated during the welding process, according to the changes in the arcing stage, the climbing slopes ISL1 and ISL2 of the two currents are appropriately adjusted in the short-circuit control stage to promote the transition of the molten droplet. By changing the inflection point value Iac of the short-circuit rising current, the necking current I_sht, that is, the current value at the moment of droplet shedding, is changed, so that the force of the welding wire breaking at the moment of transition is smaller, thereby reducing the amount of spatter generated during the welding process.

[0034] With the above findings, an embodiment of the present invention provides a DC welding control method to improve welding effect and welding efficiency. Figure 2 As shown, including:

[0035] Step 201: obtaining a transition time of a molten droplet in DC welding, and determining a molten droplet transition time deviation value in DC welding based on preset DC welding standard parameters;

[0036] Step 202: if the droplet transfer time deviation value exceeds the first preset range, adjusting the arcing stage parameters, and re-determining the droplet transfer time deviation value of DC welding, so that the re-determined droplet transfer time deviation value is within the first preset range;

[0037] Step 203: obtaining the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted, and determining the arcing time deviation value and the arcing energy deviation value based on the preset DC welding standard parameters;

[0038] Step 204: adjusting the short-circuit phase parameters according to the arcing time deviation value and the arcing energy deviation value.

[0039] In a specific embodiment, by obtaining the transition time T_cyc of a molten droplet in DC welding, the molten droplet transition time deviation value of DC welding is determined based on the preset DC welding standard parameters; if the molten droplet transition time deviation value exceeds the first preset range, the arcing stage parameters are adjusted to redetermine the molten droplet transition time deviation value of DC welding, so that the redetermined molten droplet transition time deviation value is within the first preset range; the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted are obtained, and the arcing time deviation value and arcing energy deviation value are determined based on the preset DC welding standard parameters; the short-circuit stage parameters are adjusted according to the arcing time deviation value and the arcing energy deviation value. By adjusting the arcing stage parameters, the molten droplet transition time is reasonable, the arc is stable, and no large spatter is generated; by adjusting the short-circuit stage parameters in conjunction with the adjustment of the arcing stage, the force of the wire breaking at the moment of transition is small, and the amount of spatter generated during the welding process is further reduced, thereby reducing the workload of later cleaning, which not only improves the welding efficiency but also improves the welding effect.

[0040] First, the transition time of a molten droplet in DC welding is obtained, and the deviation value of the molten droplet transition time in DC welding is determined based on the preset DC welding standard parameters. The preset DC welding standard parameters include at least: arcing stage standard parameters, including: arcing stage maximum current standard value, arcing stage current maintenance maximum value standard time, arcing stage electronic reactor standard decline slope, arcing time standard value and arcing energy standard value; short circuit stage standard parameters, including: short circuit time standard value, short circuit rise first slope standard value, short circuit rise second slope standard value and short circuit rise current inflection point standard value.

[0041] In a specific embodiment, the DC welding standard parameters are determined by preliminary tests, and the specific process includes: under the condition that the dry extension length (the dry extension length of the welding wire refers to the distance from the end of the welding wire to the end of the conductive nozzle) remains unchanged, the short circuit stage parameters and the arc burning stage parameters are adjusted to make the welding process arc stable and the spatter small. At this time, the current short circuit stage parameters and arc burning stage parameters are recorded as standard data, and subsequent adjustments are based on this standard data. The standard data under different set currents are different, and multiple tests are required to determine the standard data under different set currents, that is, the DC welding standard parameters are obtained.

[0042] Since the preset DC welding standard parameters include the standard value of the transition time of a molten droplet under the set current of this DC welding, the difference with T_cyc of this DC welding can obtain the molten droplet transition time deviation value ΔT_cyc of this DC welding. If the molten droplet transition time deviation value ΔT_cyc exceeds the first preset range, adjust the arcing stage parameters, and redetermine the molten droplet transition time deviation value of DC welding, so that the redetermined molten droplet transition time deviation value is within the first preset range. Among them, the first preset range is a preset time range, which is an acceptable range of T_cyc changes, for example, it can be 0 to 1ms. In specific implementation, the adjusted arcing stage parameters are determined according to the set voltage of DC welding, the preset DC welding standard parameters, the preset first arcing adjustment coefficient, and the preset second arcing adjustment coefficient.

[0043] In specific implementation, the adjusted arcing stage parameters are determined according to the following formula based on the set voltage of DC welding, the preset DC welding standard parameters, the preset first arcing adjustment coefficient and the preset second arcing adjustment coefficient:

[0044]

[0045]

[0046]

[0047] Among them, Iarc1 adj Represents the adjusted value of the maximum current value in the arcing stage of DC welding, A; Iarc11 represents the standard value of the maximum current in the arcing stage, A; Iarc K1 Represents the preset first arc maximum current adjustment coefficient; Iarc K2 Represents the preset second arc maximum current adjustment coefficient; setV represents the set voltage for DC welding, V; baseV represents the standard voltage (the factory default voltage of the welding machine), V; Tarc1 adj Represents the adjustment value of the time that the current maintains the maximum value during the arcing stage of DC welding, s; Tarc11 represents the standard time that the current maintains the maximum value during the arcing stage, s; Tarc K1Represents the preset first arc current maximum value maintenance time adjustment coefficient; Tarc K2 Represents the preset second arc current maximum value maintenance time adjustment coefficient; Ki adj Represents the adjustment value of the standard downslope of the electronic reactor in the arcing stage of DC welding; Ki1 represents the standard downslope of the electronic reactor in the arcing stage; Ki K1 Represents the preset first arcing down slope adjustment coefficient; Ki K2 Represents the preset second arcing down slope adjustment coefficient.

[0048] In a specific embodiment, it also includes: a determination process of the first arcing adjustment coefficient and the second arcing adjustment coefficient. Specifically, based on the test of the standard value, the set current is fixed, the length of the stem extension is changed, the stem extension is increased or decreased, and the arcing stage parameters (I_arc1, T_arc1, Ki) are changed so that T_cyc changes within the first preset range, generally controlled at about 1ms, and the values ​​of I_arc1, T_arc1, and Ki at this time are recorded, and each is divided by the standard data Iarc11, Tarc11, and Ki1 to obtain the first arcing adjustment coefficient: Iarc K1 、Tarc K1 and Ki K1 Different stem extension lengths correspond to different first arcing adjustment coefficients. In specific implementation, multiple pairs of test data can be input into a computer for fitting, so that the first arcing adjustment coefficients corresponding to different stem extension lengths can be obtained.

[0049] Then fix the set current, increase or decrease the set voltage value, match the change of stem extension length, and change the arcing stage parameters (I_arc1, T_arc1, Ki), so that T_cyc changes within the first preset range, generally controlled at about 1ms, record the values ​​of I_arc1, T_arc1, Ki at this time, divide them by the standard data Iarc11, Tarc11 and Ki1 respectively, and get the first arcing adjustment coefficient: Iarc K2 、Tarc K2 and Ki K2 Different combinations of stem extension lengths and different set voltages correspond to different second arcing adjustment coefficients. In specific implementation, multiple pairs of test data can be input into a computer for fitting, so that the second arcing adjustment coefficients corresponding to different combinations of stem extension lengths and different set voltages can be obtained.

[0050] After adjusting the arcing stage parameters using the above formula, the droplet transfer time deviation value of DC welding is re-determined, and the deviation value now falls within the first preset range. Based on the adjusted arcing stage parameters, the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted are determined, and compared with the preset DC welding standard parameters to determine the arcing time deviation value and arcing energy deviation value. According to the arcing time deviation value and arcing energy deviation value, the short circuit stage parameters are adjusted. The specific implementation process is as follows: Figure 3 As shown, including:

[0051] Step 301: If the arcing time deviation value exceeds the second preset range, adjusting the inflection point value of the short-circuit rising current in the short-circuit stage;

[0052] Step 302: If the arcing energy deviation value exceeds the third preset range, adjust the short-circuit rising first slope and the short-circuit rising second slope in the short-circuit stage.

[0053] Among them, the second preset range and the third preset range are allowable deviation ranges. The second preset range is generally greater than 0.3 times the arcing time standard value, and the third preset range is generally greater than 0.5 times the arcing energy standard value.

[0054] Since spatter is mainly generated at the moment when the molten droplet falls off during the short circuit stage, there are two main aspects to reduce spatter. One is to reduce the current value at the moment when the molten droplet falls off, and the other is to ignite the arc as soon as possible by adjusting the current rise slope after the short circuit occurs.

[0055] The current inflection point value and slope in the short-circuit stage determine the current value I_sht of the droplet shedding. The embodiment of the present invention mainly adjusts the inflection point current in real time by calculating the deviation between the current value of the arcing time and the standard value, thereby achieving the purpose of reducing I_sht. The longer the arcing time, the larger the droplet formed, and vice versa. Therefore, adjusting the short-circuit rising current inflection point in the short-circuit stage includes:

[0056] The adjusted short-circuit rising current inflection point value is determined according to the arcing time of the arcing stage after the arcing stage parameters are adjusted, the preset short-circuit inflection point current coefficient and the arcing time deviation value.

[0057] According to the following formula, the adjusted short-circuit rising current inflection point value is determined based on the arcing time of the arcing stage after the arcing stage parameters are adjusted, the preset short-circuit inflection point current coefficient and the arcing time deviation value:

[0058]

[0059] Among them, Iac adj Represents the adjustment value of the inflection point of the short-circuit rising current, A; Iac K1 Represents the preset short-circuit inflection point current coefficient, a given value, generally 0.9; T 差值Represents the arcing time deviation value, s; T now Represents the arcing time of the arcing stage after the arcing stage parameters are adjusted, s.

[0060] Since the rising slopes ISL2 and ISL2 of the current in the short-circuit stage determine the speed of short-circuit release, they are adjusted according to the energy generated in the arcing stage. The energy in the arcing stage can be calculated by the integral operation of current and voltage. In specific implementation, the first short-circuit rising slope and the second short-circuit rising slope in the short-circuit stage are adjusted, including:

[0061] Determine the adjusted short-circuit rising first slope according to the preset short-circuit rising first slope coefficient, the arcing energy deviation value and the arcing energy adjusted by the arcing stage parameters;

[0062] The adjusted short-circuit rising second slope is determined according to the preset short-circuit rising second slope coefficient, the arcing energy deviation value and the arcing energy adjusted by the arcing stage parameters.

[0063] Specifically, it is determined according to the following formula:

[0064]

[0065]

[0066] Among them, ISL1 adj Represents the adjustment value of the first slope of short circuit rise; ISL2 adj Represents the adjustment value of the second slope of short circuit rise; ISL1 K1 Represents the preset short-circuit rising first slope coefficient, a given value, generally 400A / ms; ISL2 k1 Represents the preset short-circuit rising second slope coefficient, a given value, generally 200A / ms; Q 差值 Represents the arc energy deviation value, J; Q base Represents the standard value of arc energy, J.

[0067] The arcing energy refers to the energy generated by the current and voltage during the arcing stage, which is calculated by current × voltage × time.

[0068] like Figure 4 As shown, it is a scheme flow chart of a specific example in the embodiment of the present invention. First, the standard value is collected as the standard parameter and stored and recorded. Based on this, the molten droplet transition time deviation of this welding is calculated. If there is a deviation, the main parameters of the arcing stage (I_arc1, T_arc1, Ki) are adjusted. After there is no deviation, the arcing time deviation is calculated. If there is a deviation, the short-circuit inflection point current value (Iac) is adjusted. If there is no deviation, the arcing energy deviation is calculated. If there is a deviation, the rising slope is adjusted until there is no deviation.

[0069] Through the actual welding verification of this specific example, the arc remains stable during the welding process, the spatter is small, and the welding quality is good.

[0070] Based on the same inventive concept, the embodiment of the present invention also provides a DC welding control device, the principles of solving the problems are similar, and the repeated parts are not repeated. The specific structure is as follows Figure 5 As shown, including:

[0071] The first deviation value determination module 501 is used to obtain the transition time of a molten droplet in DC welding, and determine the deviation value of the molten droplet transition time in DC welding based on preset DC welding standard parameters;

[0072] The arcing stage parameter adjustment module 502 is used to adjust the arcing stage parameters if the droplet transfer time deviation value exceeds the first preset range, and redetermine the droplet transfer time deviation value of DC welding so that the redetermined droplet transfer time deviation value is within the first preset range;

[0073] The second deviation value determination module 503 is used to obtain the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted, and determine the arcing time deviation value and the arcing energy deviation value based on the preset DC welding standard parameters;

[0074] The short circuit stage parameter adjustment module 504 is used to adjust the short circuit stage parameters according to the arcing time deviation value and the arcing energy deviation value.

[0075] The preset DC welding standard parameters include at least:

[0076] Standard parameters of the arcing stage, including: standard value of the maximum current in the arcing stage, standard time for the current to maintain the maximum value in the arcing stage, standard descending slope of the electronic reactor in the arcing stage, standard value of the arcing time and standard value of the arcing energy;

[0077] The standard parameters of the short-circuit stage include: the standard value of the short-circuit time, the standard value of the first slope of the short-circuit rise, the standard value of the second slope of the short-circuit rise and the standard value of the inflection point of the short-circuit rise current.

[0078] In a specific embodiment, the arcing stage parameter adjustment module 502 is specifically used to:

[0079] The adjusted arcing stage parameters are determined according to the set voltage of DC welding, the preset DC welding standard parameters, the preset first arcing adjustment coefficient and the preset second arcing adjustment coefficient.

[0080] In specific implementation, the short-circuit stage parameter adjustment module 504 is specifically used to:

[0081] If the arcing time deviation value exceeds the second preset range, adjusting the inflection point value of the short-circuit rising current in the short-circuit stage;

[0082] If the arcing energy deviation value exceeds the third preset range, the short-circuit rising first slope and the short-circuit rising second slope in the short-circuit stage are adjusted.

[0083] Specifically, the short-circuit phase parameter adjustment module 504 is used to:

[0084] Determine the adjusted short-circuit rising current inflection point value according to the arcing time of the arcing stage after the arcing stage parameters are adjusted, the preset short-circuit inflection point current coefficient and the arcing time deviation value;

[0085] Determine the adjusted short-circuit rising first slope according to the preset short-circuit rising first slope coefficient, the arcing energy deviation value and the arcing energy adjusted by the arcing stage parameters;

[0086] The adjusted short-circuit rising second slope is determined according to the preset short-circuit rising second slope coefficient, the arcing energy deviation value and the arcing energy adjusted by the arcing stage parameters.

[0087] An embodiment of the present invention further provides a computer device, Figure 6 Schematic diagram of a computer device in an embodiment of the present invention. The computer device can implement all steps in the DC welding control method in the above embodiment. The computer device specifically includes the following contents:

[0088] Processor (processor) 601, memory (memory) 602, communication interface (CommunicationsInterface) 603 and communication bus 604;

[0089] The processor 601, the memory 602, and the communication interface 603 communicate with each other through the communication bus 604; the communication interface 603 is used to realize information transmission between related devices;

[0090] The processor 601 is used to call the computer program in the memory 602, and the processor implements the DC welding control method in the above embodiment when executing the computer program.

[0091] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned DC welding control method is implemented.

[0092] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the above-mentioned DC welding control method is implemented.

[0093] The DC welding control method and device provided in this specific embodiment have the following advantages:

[0094] By obtaining the transition time of a molten droplet in DC welding, the molten droplet transition time deviation value of DC welding is determined based on the preset DC welding standard parameters; if the molten droplet transition time deviation value exceeds the first preset range, the arcing stage parameters are adjusted to redetermine the molten droplet transition time deviation value of DC welding, so that the redetermined molten droplet transition time deviation value is within the first preset range; the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted are obtained, and the arcing time deviation value and arcing energy deviation value are determined based on the preset DC welding standard parameters; according to the arcing time deviation value and arcing energy deviation value, the short-circuit stage parameters are adjusted. By adjusting the arcing stage parameters, the molten droplet transition time is reasonable, the arc is stable, and no large spatter is generated; by adjusting the short-circuit stage parameters in conjunction with the arcing stage adjustment, the force of the wire breaking at the moment of transition is small, further reducing the amount of spatter generated during welding, thereby reducing the workload of later cleaning, which not only improves welding efficiency but also improves welding effect.

[0095] Although the present invention provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in sequence or in parallel according to the method shown in the embodiments or the drawings (for example, in a parallel processor or multi-threaded processing environment).

[0096] It should be understood by those skilled in the art that the embodiments of this specification may be provided as methods, devices (systems) or computer program products. Therefore, the embodiments of this specification may take the form of complete hardware embodiments, complete software embodiments or embodiments combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0097] The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A device that provides the functions specified in a block or multiple blocks.

[0098] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0099] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0100] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0101] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and / or replacement of these aspects and / or embodiments. Moreover, each aspect and / or embodiment of the present invention may be used alone or in combination with one or more other aspects and / or embodiments thereof.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A DC welding control method, characterized in that: include: Obtaining a transition time of a molten droplet of DC welding, and determining a molten droplet transition time deviation value of DC welding based on preset DC welding standard parameters; If the droplet transfer time deviation value exceeds the first preset range, adjust the arcing stage parameters and redetermine the droplet transfer time deviation value of DC welding so that the redetermined droplet transfer time deviation value is within the first preset range; Obtaining the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted, and determining the arcing time deviation value and the arcing energy deviation value based on the preset DC welding standard parameters; The short-circuit phase parameters are adjusted according to the arcing time deviation value and the arcing energy deviation value.

2. The DC welding control method according to claim 1, characterized in that: If the droplet transfer time deviation value exceeds the first preset range, adjusting the arcing stage parameters includes: The adjusted arcing stage parameters are determined according to the set voltage of DC welding, the preset DC welding standard parameters, the preset first arcing adjustment coefficient and the preset second arcing adjustment coefficient.

3. The DC welding control method according to claim 2, characterized in that: The preset DC welding standard parameters at least include: Standard parameters of the arcing stage, including: standard value of the maximum current in the arcing stage, standard time for the current to maintain the maximum value in the arcing stage, standard descending slope of the electronic reactor in the arcing stage, standard value of the arcing time and standard value of the arcing energy; The standard parameters of the short-circuit stage include: the standard value of the short-circuit time, the standard value of the first slope of the short-circuit rise, the standard value of the second slope of the short-circuit rise and the standard value of the inflection point of the short-circuit rise current.

4. The DC welding control method according to claim 3, characterized in that: According to the following formula, the adjusted arcing stage parameters are determined based on the set voltage of DC welding, the preset DC welding standard parameters, the preset first arcing adjustment coefficient, and the preset second arcing adjustment coefficient: Among them, Iarc1 adj Represents the adjusted value of the maximum current value in the arcing stage of DC welding; Iarc11 represents the standard value of the maximum current in the arcing stage; Iarc K1 Represents the preset first arc maximum current adjustment coefficient; Iarc K2 Represents the preset second arc maximum current adjustment coefficient; setV represents the set voltage for DC welding; baseV represents the standard voltage; Tarc1 adj Represents the adjustment value of the time that the current maintains the maximum value during the arcing stage of DC welding; Tarc11 represents the standard time that the current maintains the maximum value during the arcing stage; Tarc K1 Represents the preset first arc current maximum value maintenance time adjustment coefficient; Tarc K2 Represents the preset second arc current maximum value maintenance time adjustment coefficient; Ki adj Represents the adjustment value of the standard downslope of the electronic reactor in the arcing stage of DC welding; Ki1 represents the standard downslope of the electronic reactor in the arcing stage; Ki K1 Represents the preset first arcing down slope adjustment coefficient; Ki K2 Represents the preset second arcing down slope adjustment coefficient.

5. The DC welding control method according to claim 1, characterized in that: According to the arcing time deviation value and the arcing energy deviation value, adjusting the short-circuit stage parameters includes: If the arcing time deviation value exceeds the second preset range, adjusting the short-circuit rising current inflection point value in the short-circuit stage; If the arcing energy deviation value exceeds the third preset range, the short-circuit rising first slope and the short-circuit rising second slope in the short-circuit stage are adjusted.

6. The DC welding control method according to claim 5, characterized in that: Adjust the short-circuit rising current inflection point during the short-circuit stage, including: The adjusted short-circuit rising current inflection point value is determined according to the arcing time of the arcing stage after the arcing stage parameters are adjusted, the preset short-circuit inflection point current coefficient and the arcing time deviation value.

7. The DC welding control method according to claim 6, characterized in that: According to the following formula, the adjusted short-circuit rising current inflection point value is determined based on the arcing time of the arcing stage after the arcing stage parameters are adjusted, the preset short-circuit inflection point current coefficient and the arcing time deviation value: Among them, Iac adj Represents the adjustment value of the inflection point of the short-circuit rising current; Iac K1 Represents the preset short-circuit inflection point current coefficient; T 差值 Represents the arcing time deviation value; T now Represents the arcing time of the arcing stage after the arcing stage parameters are adjusted.

8. The DC welding control method according to claim 5, characterized in that: Adjusting the short-circuit rising first slope and the short-circuit rising second slope in the short-circuit stage includes: Determine an adjusted short-circuit rising first slope according to a preset short-circuit rising first slope coefficient, the arcing energy deviation value and the arcing energy after the arcing stage parameter is adjusted; The adjusted short circuit rising second slope is determined according to the preset short circuit rising second slope coefficient, the arcing energy deviation value and the arcing energy after the arcing stage parameters are adjusted.

9. A DC welding control device, characterized in that: include: A first deviation value determination module is used to obtain a transition time of a molten droplet of DC welding, and determine a deviation value of the molten droplet transition time of DC welding based on preset DC welding standard parameters; An arcing stage parameter adjustment module, used to adjust the arcing stage parameters if the droplet transfer time deviation value exceeds a first preset range, and to redetermine the droplet transfer time deviation value of DC welding so that the redetermined droplet transfer time deviation value is within the first preset range; A second deviation value determination module is used to obtain the arcing time and arcing energy of the arcing stage after the arcing stage parameters are adjusted, and determine the arcing time deviation value and the arcing energy deviation value based on the preset DC welding standard parameters; The short-circuit stage parameter adjustment module is used to adjust the short-circuit stage parameters according to the arcing time deviation value and the arcing energy deviation value.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the DC welding control method according to any one of claims 1 to 8 is implemented.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the DC welding control method according to any one of claims 1 to 8 is implemented.

12. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the DC welding control method according to any one of claims 1 to 8 is implemented.

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