CN115255576A

CN115255576A - Welding working point setting method, device, equipment and storage medium

Info

Publication number: CN115255576A
Application number: CN202210893820.2A
Authority: CN
Inventors: 郑兵
Original assignee: Shenzhen Adax Technology Co ltd
Current assignee: Shenzhen Adax Technology Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-11-01

Abstract

The application is applicable to the technical field of welding, and provides a welding working point setting method, a device, equipment and a storage medium, wherein the method comprises the steps of obtaining a parameter setting mode of a welding working point, and obtaining an initial parameter offset of a last welding working point adjacent to the current welding working point; processing the initial parameter offset according to the parameter setting mode to generate a new parameter offset; and searching the process parameters of the current welding working point from the welding process parameter set, and performing superposition processing on the new parameter offset and the process parameters to generate the static setting parameters of the current welding working point. The welding working point setting method avoids the risk of neglecting the initial offset due to inexperience of a user, and improves the stability of welding quality; and the technological parameters corresponding to the current welding working points are all tested parameters meeting the preset performance requirements, so that the stability of the welding quality can be better ensured, and the welding performance is improved.

Description

Welding working point setting method, device, equipment and storage medium

Technical Field

The application belongs to the technical field of welding, and particularly relates to a welding working point setting method, device, equipment and storage medium.

Background

The cooperative gas metal arc welding typically incrementally adjusts the weld operating point prior to welding. Through incremental adjustment, the extension length of a welding wire and welding energy parameters (such as welding current) influencing arc energy can be preset and adjusted when the wire feeding speed is constant, so that high-quality welding seam quality and satisfactory welding performance can be obtained in the welding process.

An offset in a weld energy parameter, such as a weld current offset, is typically generated after the welding operator has performed an incremental adjustment of a certain weld work point. How to deal with the above-described amount of deviation of the welding energy parameter depends excessively on the experience and judgment of the welding operator when performing incremental adjustment of the next welding work point, resulting in poor stability of welding quality.

Disclosure of Invention

In view of the foregoing background, an embodiment of the present application provides a method for setting a welding operating point, so as to solve a technical problem in the prior art that a static setting method for a welding operating point is likely to cause unstable welding quality.

In a first aspect, an embodiment of the present application provides a welding work point setting method, where the method includes:

acquiring a parameter setting mode of a welding working point;

acquiring initial parameter offset of a previous welding working point adjacent to the current welding working point;

processing the initial parameter offset according to the parameter setting mode to generate a new parameter offset;

searching the technological parameters of the current welding working point from the welding technological parameter set, and performing superposition processing on the new parameter offset and the technological parameters to generate static setting parameters of the current welding working point; the welding process parameter set comprises process parameters of a plurality of welding working points meeting preset welding performance requirements.

In one possible implementation form of the first aspect, the initial parameter offset comprises an offset of a welding energy parameter;

the obtaining of the initial parameter offset of the last welding working point adjacent to the current welding working point includes:

acquiring a first welding energy parameter after the last welding working point is subjected to incremental adjustment;

searching a second welding energy parameter of the last welding working point from the welding working point parameter set;

determining a difference between the first weld energy parameter and the second weld energy parameter as the initial parameter offset.

In a possible implementation manner of the first aspect, the initial parameter offset is processed according to the parameter setting mode to generate a new parameter offset; the method comprises the following steps:

when the parameter setting mode is the neglect mode, the initial parameter offset is subjected to zero returning processing to generate the new parameter offset;

determining the initial parameter offset as the new parameter offset under the condition that the parameter setting mode is a band following mode;

and under the condition that the parameter setting mode is a change mode, acquiring the offset amplitude of the welding energy parameter of the current welding working point, and carrying out amplitude limiting processing on the initial parameter offset according to the offset amplitude to generate the new parameter offset.

In a possible implementation manner of the first aspect, before the obtaining the parameter setting mode of the welding working point, the method further includes:

according to a welding process test, acquiring process parameters of a plurality of welding working points meeting preset welding performance requirements; wherein the preset welding performance requirements include: the molten drop transition frequency is greater than or equal to 60% of the maximum molten drop transition frequency, and/or the weld forming width consistency is less than or equal to 10%;

combining the process parameters of the plurality of welding working points to generate the welding process parameter set; the technological parameters of each welding working point comprise wire feeding speed, mutually matched welding energy parameters and welding wire extension length.

In a possible implementation manner of the first aspect, the obtaining, according to a welding process test, process parameters of a plurality of welding operation points that meet a preset welding performance requirement includes:

acquiring a welding work upper boundary point, a welding work lower boundary point and a plurality of welding work test points at the current wire feeding speed; the welding operation upper boundary point has a minimum welding wire extending length meeting the preset welding performance requirement and a welding energy parameter matched with the minimum welding wire extending length, and the welding operation lower boundary point has a maximum welding wire extending length meeting the preset welding performance requirement and a welding energy parameter matched with the maximum welding wire extending length;

performing interpolation operation according to the welding work upper limit point, the welding work lower limit point and the plurality of welding work test points, and determining a welding work middle point at the current wire feeding speed and a welding process parameter subset at the current wire feeding speed; the welding performance is optimal when the technological parameters of the welding working midpoint are adopted for welding;

and adjusting the current wire feeding speed, and returning to execute the acquisition of the upper limit point of the welding work, the lower limit point of the welding work and the plurality of test points of the welding work at the current wire feeding speed until the acquisition of the welding process parameter subsets respectively corresponding to the plurality of wire feeding speeds.

In a possible implementation manner of the first aspect, the obtaining an upper limit point of welding work, a lower limit point of welding work, and a plurality of test points of welding work at the current wire feeding speed includes:

determining the technological parameters of a first working point meeting the preset welding performance requirement by adopting a trial and error method;

determining the first working point as a starting point, and adjusting the technological parameters of the starting point to generate first parameters; wherein the adjusting comprises adjusting the welding wire extension length and the welding energy parameter simultaneously, and the welding wire extension length and the welding energy parameter conform to a monotone decreasing relation curve;

acquiring welding performance parameters when welding is carried out by adopting the first parameters;

under the condition that the welding performance parameters meet the preset welding performance requirements, saving the welding working point corresponding to the first parameter as a starting point;

and returning to the step of executing the step of adjusting the process parameters of the starting point to generate the first parameters until the welding work upper boundary point and the welding work lower boundary point are obtained.

In a possible implementation manner of the first aspect, after obtaining the subset of welding process parameters corresponding to each of the plurality of wire feed speeds, the method further includes:

carrying out interpolation operation on the welding working midpoints corresponding to the wire feeding speeds respectively to generate a welding median working baseline;

performing interpolation operation on the welding work upper boundary points respectively corresponding to the wire feeding speeds to generate a welding work upper boundary base line;

and carrying out interpolation operation on the welding work lower boundary points respectively corresponding to the wire feeding speeds to generate a welding lower boundary work base line.

In the welding working point setting method provided by the embodiment of the application, after the parameter setting mode is selected, the welding machine automatically processes the current and/or voltage offset of the previous working point according to the selected working mode, and then superimposes the offset on the parameter corresponding to the current welding working point to obtain a new and applicable welding process parameter. On one hand, the method provides parameter setting mode selection for the user, meets different welding requirements in different welding application scenes, improves the efficiency of setting the welding working point, avoids the risk of neglecting the initial offset due to the lack of experience of the user, and improves the stability of welding quality; on the other hand, the technological parameters corresponding to the current welding working points are obtained by searching in a welding technological parameter set, and the technological parameters are all tested parameters meeting the preset performance requirements, so that the stability of welding quality can be better ensured, and the welding performance is improved.

In a second aspect, an embodiment of the present application provides a welding work point setting device, including:

the first acquisition module is used for acquiring a parameter setting mode of a welding working point;

the second acquisition module is used for acquiring the initial parameter offset of the last welding working point adjacent to the current welding working point;

the generating module is used for processing the initial parameter offset according to the parameter setting mode to generate a new parameter offset;

the superposition module is used for searching the process parameters of the current welding working point from the welding process parameter set, and carrying out superposition processing on the new parameter offset and the process parameters to generate the static setting parameters of the current welding working point; the welding process parameter set comprises process parameters of a plurality of welding working points meeting preset welding performance requirements.

In a third aspect, an embodiment of the present application provides a welding work point setting device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of any one of the methods of the first aspect when executing the computer program.

In a fourth aspect, the present application provides a computer-readable storage medium, where a computer program is stored, and when executed by a processor, the computer program implements the steps of any one of the methods in the first aspect.

In a fifth aspect, the present application provides a computer program product, which when run on a terminal device, causes the terminal device to execute the method of any one of the above first aspects.

It is to be understood that, for the beneficial effects of the second aspect to the fifth aspect, reference may be made to the relevant description in the first aspect, and details are not described herein again.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic flowchart of a welding work point setting method according to an embodiment of the present disclosure;

FIG. 2 is a schematic flow chart diagram illustrating a method for obtaining a set of welding process parameters according to an embodiment of the present application;

FIG. 3 is a schematic flowchart of a method for obtaining a set of welding process parameters according to another embodiment of the present application;

FIG. 4 is a schematic flow chart illustrating a method for obtaining welding process parameter sets according to another embodiment of the present application;

FIG. 5 is a graphical illustration of the relationship between CTWD and welding current and welding performance parameters, respectively, as provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a welding work point setting apparatus according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a welding operation point setting device according to another embodiment of the present disclosure

Fig. 8 is a hardware composition diagram of a welding work point setting apparatus according to an embodiment of the present disclosure.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically stated.

For example, when the wire feed speed is constant, a) the welding point changes from the welding midpoint to the welding high point, both the welding current and the welding voltage should be increased, while the proposed sheet thickness is unchanged; alternatively, b) the welding point is changed from the welding point middle point to the welding point low point, the welding current and the welding voltage are both reduced correspondingly, while the proposed sheet thickness remains unchanged.

An offset in a weld energy parameter, such as a weld current offset, is typically generated after the welding operator has performed an incremental adjustment of a certain weld work point. When the incremental adjustment of the next welding working point is carried out, how to process the offset of the welding energy parameter excessively depends on the experience and judgment of welding operators, scientific basic theory guidance is lacked, and no corresponding technical standard can be complied with, so that the welding quality stability of the designed welding machine system is not high, and the requirements of high-quality and high-performance welding production cannot be met.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. It is worth mentioning that the specific embodiments listed below may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

Fig. 1 is a schematic flowchart of a welding working point setting method according to an embodiment of the present application, and as shown in fig. 1, the method includes:

and S101, acquiring a parameter setting mode of a welding working point.

In this embodiment, the parameter setting mode is used to describe a processing mode of the parameter offset. The parameter offset refers to the variation of the welding energy parameter in incremental adjustment. Such as an increase in welding current, or an increase in welding voltage.

In incremental adjustments, the welding current (or welding voltage) is allowed to vary over a range with a constant wire feed speed, so that one wire feed speed may correspond to multiple welding work points, including a mid-point welding work point, a high welding work point, and a low welding work point.

Generally, the welding working points in the initial state of the welding machine are all the welding working middle points, and the welding working points after incremental adjustment are no longer the welding working middle points, for example, the welding working points are high welding working points. Therefore, the adjusted welding working point generates the variation of the welding current and/or the welding voltage relative to the welding working point, namely the parameter offset.

And S102, acquiring the initial parameter offset of the last welding working point adjacent to the current welding working point.

In this embodiment, the initial parameter offset includes a welding energy parameter offset, such as a current offset, a voltage offset.

In this embodiment, a feasible implementation manner for obtaining the initial parameter offset of the previous welding operating point adjacent to the current welding operating point includes:

step 1: and acquiring a first welding energy parameter after the previous welding working point is subjected to incremental adjustment.

Step 2: the second welding energy parameter of the last welding working point is searched from the welding working point parameter set.

And step 3: determining a difference between the first weld energy parameter and the second weld energy parameter as an initial parameter offset.

The welding process parameter set comprises process parameters of a plurality of welding working points meeting preset welding performance requirements.

In this embodiment, the first welding energy parameter and the second welding energy parameter are the same type of parameter.

And S103, processing the initial parameter offset according to the parameter setting mode to generate a new parameter offset.

In this embodiment, the parameter setting mode includes an ignoring mode and a band following mode to change the modes, and the mode corresponds to the clear, hold and clip operations, respectively. Accordingly, a feasible implementation manner for processing the initial parameter offset according to the parameter setting mode and generating a new parameter offset includes:

mode 1: and under the condition that the parameter setting mode is the neglect mode, carrying out zero returning processing on the initial parameter offset to generate the new parameter offset.

The parameter setting mode is an ignoring mode, which means that the offset of the welding energy parameter of the last welding working point is ignored, and specifically, the initial parameter offset is subjected to zeroing processing to generate a new parameter offset.

Mode 2: and determining the initial parameter offset as a new parameter offset under the condition that the parameter setting mode is the band-associated mode.

The parameter setting mode is a follow-up mode, which means that the welding energy parameter of the last welding working point is kept unchanged, and is specifically characterized in that the initial parameter offset is determined as a new parameter offset.

Mode 3: and under the condition that the parameter setting mode is the change mode, acquiring the offset amplitude of the welding energy parameter of the current welding working point, and carrying out amplitude limiting processing on the initial parameter offset according to the offset amplitude to generate a new parameter offset.

The parameter setting mode is a band-following mode, which indicates that the welding energy parameter of the last welding working point needs to be changed, and specifically, amplitude limiting processing can be performed on the initial parameter offset according to the offset amplitude of the welding energy parameter of the current welding working point. Alternatively, the offset magnitude of the welding energy parameter of the current welding working point may be obtained from a set of welding process parameters.

In this step, the limiting process of the initial parameter offset according to the offset amplitude includes: if the initial parameter offset is greater than or equal to the offset amplitude, determining the offset amplitude as a new parameter offset; and if the initial parameter offset is smaller than the offset amplitude, determining the initial parameter offset as a new parameter offset.

S104, searching the technological parameters of the current welding working point from the welding technological parameter set, and performing superposition processing on the new parameter offset and the technological parameters to generate static setting parameters of the current welding working point.

In this embodiment, the process parameters of each welding working point in the welding process parameter set include wire feeding speed, mutually matched welding energy parameter, and welding wire extension length.

The welding wire extending length refers to the length of the welding wire extending from the end of the contact tip to the surface of the workpiece, i.e., the welding wire extending length is used to describe the distance CTWD from the contact tip to the workpiece, and the CTWD is expressed by the welding wire extending length hereinafter.

As is clear from the arc characteristics, when the welding current becomes small, the arc length becomes small, the welding arc becomes short, the amount of heat generated by the welding current decreases, and in order to ensure that the melting speed at the time of welding does not change (i.e., the wire feeding speed does not change), it is necessary to increase the wire stick-out length, i.e., increase the CTWD, and at this time, the CTWD becomes large, and the welding wire generates a large resistance heat, and it is possible to ensure that the melting speed is kept the same as before (before the welding current decreases) by this large resistance heat. Therefore, in incremental adjustment, the welding energy parameter (e.g., welding current) and the wire stick-out length are paired up and need to be adjusted simultaneously.

Wherein the welding energy parameter comprises one or more of a welding current, a welding voltage, a welding impedance, a welding power. For ease of understanding, the welding energy parameter is hereinafter represented by the welding current for exemplary purposes.

In this embodiment, the welding process parameter set may be obtained in advance through a welding process test. Optionally, the set of welding process parameters includes a subset of welding process parameters corresponding to each of the plurality of wire feed speeds.

Wherein each subset of welding process parameters includes a plurality of pairs of welding currents and wire stick-out lengths at the same wire feed speed.

In this embodiment, a feasible implementation manner of generating the static setting parameter of the current welding working point by performing the overlay processing on the new parameter offset and the process parameter includes:

step 1: and overlapping the new current offset and the welding current in the process parameters of the current welding working point to obtain the updated welding current.

Step 2: and determining the searched wire feeding speed, the updated welding current and the searched wire extending length as the static setting parameters of the current welding working point.

In the welding working point setting method provided by the embodiment of the application, after the parameter setting mode is selected, the welding machine automatically processes the current and/or voltage offset of the previous working point according to the selected working mode, and then superimposes the offset on the parameter corresponding to the current welding working point to obtain a new and applicable welding process parameter. On one hand, the method provides parameter setting mode selection for the user, meets different welding requirements in different welding application scenes, improves the efficiency of setting the welding working point, avoids the risk of neglecting the initial offset due to the lack of experience of the user, and improves the stability of the welding quality; on the other hand, the process parameters corresponding to the current welding working point are obtained by searching in a welding process parameter set, and the process parameters are all tested parameters meeting the preset welding performance requirements, so that the stability of the welding quality can be better ensured, and the welding performance is improved.

As can be seen from the embodiment of fig. 1, a welding process parameter set needs to be acquired in advance before the current welding working point is set, so as to set the welding working point parameters. The welding process parameter set comprises process parameters of a plurality of welding working points meeting the preset welding performance requirement, and the process parameters are tested parameters meeting the preset performance requirement, so that the stability of the welding quality can be better ensured, and the welding performance is improved. A possible embodiment of the pre-acquisition of the welding process parameter set is described below by means of the embodiment of fig. 2 to 4.

Fig. 2 is a schematic flowchart of a method for obtaining a welding process parameter set according to an embodiment of the present application, and as shown in fig. 2, before step 101, the method further includes:

s201, acquiring process parameters of a plurality of welding working points meeting the preset welding performance requirement according to the welding process test.

The technological parameters of each welding working point comprise wire feeding speed, mutually matched welding energy parameters and welding wire extension length.

Since in the incremental adjustment, one wire feeding speed may correspond to a plurality of welding operation points, in this embodiment, the wire feeding speed may be determined as a basis for the adjustment of the welding operation points. After a wire feeding speed is set, the wire feeding speed is kept constant, and a welding process parameter subset (i.e. process parameters corresponding to a plurality of welding working points respectively) corresponding to the wire feeding speed is obtained. The wire feed speed is then adjusted to obtain various respective subsets of welding process parameters for different wire feed speeds, as illustrated by the embodiment of fig. 3 below.

In this embodiment, the preset welding performance requirement includes: the droplet transfer frequency is greater than or equal to 60% of the maximum droplet transfer frequency, and/or the weld formation width uniformity is less than or equal to 10%.

And S202, combining the process parameters of the plurality of welding working points to generate a welding process parameter set.

In this embodiment, combining the process parameters of the plurality of welding operation points to generate the welding process parameter set includes: and combining the welding process parameter subsets respectively corresponding to the wire feeding speeds to generate a welding process parameter set.

The method for acquiring the welding process parameter set provided by the embodiment of the application determines the preset welding performance requirement and comprises the following steps: the molten drop transition frequency is greater than or equal to 60% of the maximum molten drop transition frequency, and/or the consistency of the weld forming width is less than or equal to 10%, so that the welding performance of parameters in a welding process parameter set is guaranteed when a welding working point is set.

FIG. 3 is a schematic flow chart diagram illustrating a method for obtaining a set of welding process parameters according to another embodiment of the present application, which illustrates one possible implementation of step 201 in the embodiment of FIG. 2; as shown in fig. 3, acquiring the process parameters of the plurality of welding operating points meeting the preset welding performance requirement includes:

s301, obtaining a welding work upper limit point, a welding work lower limit point and a plurality of welding work test points at the current wire feeding speed.

In this embodiment, the upper boundary point of the welding operation has a minimum wire extending length that meets the preset welding performance requirement and a welding energy parameter that matches the minimum wire extending length, and the lower boundary point of the welding operation has a maximum wire extending length that meets the preset welding performance requirement and a welding energy parameter that matches the maximum wire extending length.

In this embodiment, the welding work test points are welding work points that have been verified by a welding process test and meet a preset welding performance requirement, and process parameters of the plurality of welding work test points are different from each other.

In this embodiment, the welding work upper boundary point, the welding work lower boundary point, and the welding work test point are obtained through a welding process test.

S302, performing interpolation operation according to the upper limit point of welding work, the lower limit point of welding work and a plurality of welding work test points, and determining a welding work midpoint at the current wire feeding speed and a welding process parameter subset at the current wire feeding speed; and the welding performance is optimal when the welding is carried out by adopting the process parameters of the welding working midpoint.

In this embodiment, the optimal welding performance may include the highest droplet transfer frequency, the most uniform uniformity of the weld forming width, and/or the like.

In this embodiment, if the welding wire extending length CTWD is taken as the ordinate and the welding performance parameter is taken as the abscissa, the approximately normal distribution curve of the welding performance parameter and the CTWD may be obtained.

Illustratively, the Welding Performance Parameter (WPP) is the droplet transfer frequency. The droplet transfer frequency corresponding to the welding operating midpoint is the maximum, 100%. The upper boundary point and the lower boundary point of the welding work respectively correspond to the minimum molten drop transition frequency which meets the preset requirement and is 60 percent; the corresponding molten drop transition frequency of each welding work test point is between 60% and 100%.

In order to improve efficiency, the welding working midpoint at the current wire feeding speed and the subset of the welding process parameters at the current wire feeding speed may be determined by an interpolation operation method.

Alternatively, the process parameters of the welding work midpoint can also be directly determined by welding process tests.

And S303, adjusting the current wire feeding speed, and returning to execute the acquisition of the upper limit point of the welding work, the lower limit point of the welding work and the plurality of test points of the welding work at the current wire feeding speed until the welding process parameter subsets respectively corresponding to the plurality of wire feeding speeds are obtained.

In this embodiment, the selection range of the wire feeding speed may be determined according to the application requirement.

In this embodiment, the plurality of wire feed speeds at least include the maximum wire feed speed and the minimum wire feed speed in the selected range, so as to perform interpolation operation.

Optionally, for determining the welding process parameter set in the maximum range, after obtaining the welding process parameter subsets corresponding to the wire feed speeds respectively, the method may further include:

mode 1: and carrying out interpolation operation on the welding working midpoints corresponding to the wire feeding speeds respectively to generate a welding median working baseline, and storing the welding working points on the welding median working baseline as initial values in a welding machine system.

Mode 2: and carrying out interpolation operation on the welding work upper boundary points respectively corresponding to the wire feeding speeds to generate a welding work upper boundary base line.

And 3, performing interpolation operation on the welding work lower boundary points respectively corresponding to the wire feeding speeds to generate a welding lower boundary work base line.

Optionally, a closed area enclosed by the welding upper-bound work baseline, the welding lower-bound work baseline, the maximum wire feeding speed, and the minimum wire feeding speed is a possible value range of the welding process parameters meeting the preset performance requirements.

The embodiment of the application provides a method for acquiring process parameters of a plurality of welding working points, which can acquire the process parameters of all the welding working points meeting the preset performance requirement so as to be recommended when the welding working points are set, thereby ensuring the stability of the welding quality.

Fig. 4 is a flowchart of a method for obtaining a set of welding process parameters according to another embodiment of the present application, illustrating a possible implementation of step 301 in fig. 3, where as shown in fig. 4, obtaining an upper limit point of a welding operation, a lower limit point of the welding operation, and a plurality of test points of the welding operation at a current wire feed speed includes:

s401, determining the process parameters of the first working point meeting the preset welding performance requirement by adopting a trial and error method.

In this embodiment, the first working point may be any welding working point that meets the preset welding performance requirement at the current wire feeding speed.

For example, the welding current may be adjusted to ensure that the welding performance at the first operating point meets the preset requirements at the current wire feed speed by first setting the wire extension CTWD and then keeping the wire extension constant. Wherein, the extension length of the welding wire and the welding current can be set according to the experience of users.

Illustratively, the current wire feed speed is V_fThe wire stick out length at the first working point was 14mm, matching a welding current of 70A.

S402, determining a first working point as a starting point, and adjusting the technological parameters of the starting point to generate first parameters; the adjusting comprises adjusting the welding wire extension length and the welding energy parameter simultaneously, and the welding wire extension length and the welding energy parameter conform to a monotone decreasing relation curve.

In incremental adjustments, where the wire feed speed is held constant, the welding energy parameter (e.g., welding current) and the wire stick-out length are paired up with each other, requiring simultaneous adjustment of the welding energy parameter and the wire stick-out length.

As is clear from the arc characteristics, when the welding current becomes small, the arc length becomes small, the welding arc becomes short at this time, the amount of heat generated by the welding current decreases, and in order to keep the melting speed at the time of welding constant (i.e., the wire feeding speed constant), it is necessary to increase the wire stick-out length, and at this time, the wire stick-out length CTWD becomes large, and the wire generates large resistance heat, and it is possible to keep the melting speed consistent with that before (before the welding current decreases) by this large resistance heat. Accordingly, when the welding current is increased, the arc length becomes large, and when the wire feed speed is kept constant, the wire stick-out length needs to be reduced, and therefore, the wire stick-out length and the welding energy parameter conform to a monotonous decreasing relation curve in the present embodiment.

For example, referring to fig. 5, fig. 5 is a schematic diagram illustrating the relationship between CTWD and welding current and welding performance parameters, respectively, according to an embodiment of the present application; it should be understood that the wire feed speed is a constant value in this figure. In fig. 5, curve 1 is a monotonically decreasing relation between the wire extension CTWD and the welding current I, and curve 2 is an approximately normal distribution curve between CTWD and WPP (taking the droplet transition frequency as an example).

As shown in curve 1 in fig. 5, the welding current I decreases as the wire extension CTWD increases, and increases as the CTWD decreases, and a single-valued monotonic correspondence between CTWD and I is satisfied.

In the embodiment, the adjustment comprises two adjustment directions, wherein the first adjustment direction is used for obtaining a low welding working point, namely, the welding current is reduced while the extension length of the welding wire is increased; the second adjustment direction is used for obtaining a high welding working point, namely, the welding current is increased while the extension length of the welding wire is reduced.

Illustratively, referring collectively to FIG. 5, the current wire feed speed is V_fThe first working point may be P4 point, and the wire stick-out length CTWD at P4 point may be C₁Correspondingly, the welding current is I₁Setting the adjusting direction as a second adjusting direction, and obtaining a welding working point P5 and a welding wire extension length C of P5₂Correspondingly, the welding current is I₂In which C is₁Greater than C₂，I₁Is less than I₂And the molten drop transition frequencies of the point P4 and the point P5 are both larger than 60 percent, so that the requirement of preset welding performance is met.

And S403, acquiring welding performance parameters during welding by adopting the first parameters.

In this step, the welding performance parameters include droplet transfer frequency and/or weld width uniformity.

And S404, under the condition that the welding performance parameters meet the preset welding performance requirements, saving the welding working point corresponding to the first parameter as a starting point.

In this embodiment, if the welding performance parameter of the first parameter does not meet the preset welding performance requirement, it indicates that the adjusted first parameter in step 402 has exceeded the process parameter range of the welding operation upper limit point or the welding operation lower limit point. And at the moment, keeping the initial point unchanged, and reducing the adjustment amount until the welding performance parameter when the first parameter is adopted for welding meets the preset welding performance requirement.

If the welding performance of the first parameter meets the preset welding performance requirement, the welding working point corresponding to the first parameter can be determined as a welding working test point.

Optionally, the welding performance of the first parameter may be compared to the welding performance of the weld using the process parameters of the first operating point to determine the effect of the adjustment in step 402.

S405, returning to the step of generating the first parameter by executing the process parameter of the adjusting starting point until the welding work upper limit point and the welding work lower limit point are obtained.

As can be seen from the embodiment of FIG. 3, the upper boundary point of the welding operation has a minimum wire stick-out length that meets the preset welding performance requirements, and a welding energy parameter that matches the minimum wire stick-out length. After the upper boundary point of the welding work is determined as the starting point, if the extension length of the welding wire is reduced, the welding performance can not meet the preset requirement no matter how much the welding current is.

Correspondingly, the lower boundary point of the welding work has the maximum welding wire extending length meeting the preset welding performance requirement and the welding energy parameter matched with the maximum welding wire extending length. And after the lower boundary point of the welding work is determined as the starting point, if the extension length of the welding wire is increased, the welding performance of the welding wire cannot meet the preset requirement no matter how much the welding current is.

For example, referring to fig. 5, as shown in fig. 5, point P3 is an upper limit point of the welding operation, the droplet transition frequency is 60%, the preset requirement is met, and point P3 has a minimum wire extension length CTWD and a maximum welding current matching the minimum wire extension length; the point P2 is a lower boundary point of welding work, the droplet transition frequency is 60%, the preset requirement is met, and the point P2 is provided with the maximum welding wire extending length CTWD and the minimum welding current matched with the maximum welding wire extending length.

In this embodiment, in order to improve the efficiency of acquiring the upper boundary point and the lower boundary point of the welding work, the adjustment direction or the adjustment amount in the next iteration may be determined according to the welding performance parameters in three adjacent iterations.

Wherein, the adjusting direction comprises the adjustment of the wire extending length CTWD or the adjustment of the wire extending length CTWD, and the size of the adjusting quantity is used for describing the changing quantity of the CTWD during each adjustment.

The adjusting in the step also comprises adjusting the extending length of the welding wire and the welding current at the same time, and the extending length of the welding wire and the welding current conform to a monotone decreasing relation curve.

For a more clear description of the present embodiment, please refer to FIG. 5, in which the current wire feeding speed is V_f。

The extending length of a welding wire at the first working point is 14mm, the matched welding current is 70A, and the molten drop transition frequency is F1 when the welding is carried out by adopting the technological parameters of the first working point;

in the 1 st iteration, the direction is adjusted to be smaller, the welding current is adjusted to be larger, correspondingly, the welding wire extension length in the first parameter is adjusted to be 12mm, the welding current is adjusted to be 80A, and the molten drop transition frequency when the first parameter is adopted for welding is F2;

the adjustment direction is kept unchanged in the 2 nd iteration, the correspondingly adjusted parameters are that the extension length of the welding wire is adjusted to be 10mm, the welding current is adjusted to be 90A, and the molten drop transition frequency when welding is carried out by adopting the adjusted parameters is F3.

If F1 is larger than F2 and F2 is larger than F3, the welding performance index is reduced by two iterations in the same adjusting direction; and (3) indicating that the WPPs corresponding to the first working point, the working point after the 1 st iteration and the working point after the 2 nd iteration are positioned on the descending side of the approximate normal distribution curve, and if the adjusting direction is kept unchanged, acquiring an upper bound point P3 of the welding work after N iterations, wherein N is more than 2.

If F1 is smaller than F2 and F2 is smaller than F3, namely in the same adjusting direction, the welding performance index is improved in two iterations, the WPPs corresponding to the first working point, the working point after the 1 st iteration and the working point after the 2 nd iteration are positioned on the rising side of the approximate normal distribution curve, the adjusting direction is changed at the moment, namely the adjusting direction is changed to increase the extending length of the welding wire, the upper boundary point of the welding work can be obtained after M iterations, wherein M is larger than 2.

Accordingly, if the adjustment direction is kept unchanged, the welding work midpoint P1 is obtained after at least one iteration.

If F1 is smaller than F2 and F2 is larger than F3, the first working point, the working point after the 1 st iteration and the WPP corresponding to the working point after the 2 nd iteration are represented on two sides of the approximate normal distribution curve, and it can be known that the process parameter of the welding working midpoint P1 should be located among the three working points. The welding work midpoint P1 may be determined experimentally or by interpolation.

Further, at this time, the adjustment direction of the first working point may also be changed, and the WPP corresponding to the working point after the 3 rd iteration is obtained, so as to determine whether the first working point and the WPP corresponding to the working point after the 3 rd iteration are on the ascending side or the descending side of the approximate normal distribution curve, and further continue the iteration to obtain the welding work upper bound point or the welding work lower bound point.

And all the working points meeting the preset welding performance requirements, which are acquired in the multiple iteration processes, are welding working test points.

It should be understood that the welding energy parameters in the present embodiment are exemplified by the welding current. The welding energy parameter can also be welding voltage, and the extension length of the welding wire and the welding voltage also accord with a monotone decreasing relation curve.

It should be understood that, while ensuring that the welding wire extension length and the welding energy parameter are adjusted at the same time, and the welding wire extension length and the welding energy parameter conform to the monotonically decreasing relation curve, a welding process parameter set meeting the preset welding performance requirement may be obtained in a plurality of welding process test modes, which are not described herein in detail.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Based on the welding working point setting method provided by the embodiment, the embodiment of the invention further provides an embodiment of a device for realizing the embodiment of the method.

Fig. 6 is a schematic structural diagram of a welding working point setting device according to an embodiment of the present application. Including units for performing the steps of the embodiment corresponding to fig. 1, refer to the related description of the embodiment corresponding to fig. 1. For convenience of explanation, only the portions related to the present embodiment are shown. Referring to fig. 6, the welding work point setting device 60 includes:

a first obtaining module 601, configured to obtain a parameter setting mode of a welding working point;

a second obtaining module 602, configured to obtain an initial parameter offset of a previous welding operating point adjacent to a current welding operating point;

a generating module 603, configured to process the initial parameter offset according to the parameter setting mode, and generate a new parameter offset;

the superposition module 604 is configured to search a set of welding process parameters for a current welding operating point, and perform superposition processing on the new parameter offset and the process parameters to generate static setting parameters of the current welding operating point; the welding process parameter set comprises process parameters of a plurality of welding working points meeting preset welding performance requirements.

Optionally, the initial parameter offset comprises an offset of a welding energy parameter; the second obtaining module 602 is configured to obtain an initial parameter offset of a last welding working point adjacent to the current welding working point, and specifically includes:

acquiring a first welding energy parameter after the previous welding working point is subjected to incremental adjustment;

determining a difference between the first welding energy parameter and the second welding energy parameter as the initial parameter offset.

Optionally, the generating module 603 processes the initial parameter offset according to the parameter setting mode, and generates a new parameter offset, which specifically includes:

In the welding working point setting device provided by the embodiment of the application, after the parameter setting mode is selected, the welding machine automatically processes the current and/or voltage offset of the previous working point according to the selected working mode, and then superimposes the offset on the parameter corresponding to the current welding working point to obtain a new and applicable welding process parameter. On one hand, the method provides parameter setting mode selection for the user, meets different welding requirements in different welding application scenes, improves the efficiency of setting the welding working point, avoids the risk of neglecting the initial offset due to the lack of experience of the user, and improves the stability of welding quality; on the other hand, the process parameters corresponding to the current welding working point are obtained by searching the welding process parameter set, and the process parameters are all tested parameters meeting the preset performance requirements, so that the stability of the welding quality can be better ensured, and the welding performance is improved.

Fig. 7 is a schematic structural diagram of a welding work point setting device according to another embodiment of the present application. The units are included for executing steps in the embodiments corresponding to fig. 2 to fig. 4, and refer to the related descriptions in the embodiments corresponding to fig. 2 to fig. 4. For convenience of explanation, only the portions related to the present embodiment are shown, and as shown in fig. 7, the welding work point setting apparatus 60 further includes:

a third obtaining module 605, configured to obtain, according to the welding process test, process parameters of a plurality of welding operating points that meet a preset welding performance requirement; wherein the preset welding performance requirements include: the molten drop transition frequency is greater than or equal to 60% of the maximum molten drop transition frequency, and/or the weld forming width consistency is less than or equal to 10%;

a combining module 606 for combining the process parameters of the plurality of welding working points to generate the welding process parameter set; the technological parameters of each welding working point comprise wire feeding speed, mutually matched welding energy parameters and welding wire extension length.

Optionally, the third obtaining module 605 obtains, according to the welding process test, the process parameters of the multiple welding working points that meet the preset welding performance requirement, specifically including:

performing interpolation operation according to the welding work upper limit point, the welding work lower limit point and the plurality of welding work test points, and determining a welding work midpoint at the current wire feeding speed and a welding process parameter subset at the current wire feeding speed; the welding performance is optimal when the technological parameters of the welding working midpoint are adopted for welding;

Optionally, the third obtaining module 605 obtains the welding work upper limit point, the welding work lower limit point, and the plurality of welding work test points at the current wire feeding speed, which specifically includes:

determining the technological parameters of a first working point which meets the preset welding performance requirement by adopting a trial and error method;

Optionally, the third obtaining module 605 is further specifically configured to:

The welding working point setting device provided by the embodiment of the application can acquire the process parameters of all welding working points meeting the preset performance requirements, so that the recommendation can be carried out when the welding working points are set, and the stability of the welding quality is further ensured.

The welding working point setting device provided in the embodiment shown in fig. 6 and 7 can be used for implementing the technical solutions in the above method embodiments, and the implementation principle and technical effects are similar, and are not described again in this embodiment.

Fig. 8 is a schematic diagram of a welding work point setting apparatus according to an embodiment of the present application. As shown in fig. 8, the welding work point setting device 70 of this embodiment includes: at least one processor 701, a memory 702 and a computer program stored in the memory 702 and executable on said processor 701, the welding work point setting device 70 further comprises a communication means 703, wherein the processor 701, the memory 702 and the communication means 703 are connected by a bus 704.

The processor 701, when executing the computer program, implements the steps in the method embodiment of setting a welding work point of fig. 1. Illustratively, a computer program may be partitioned into one or more modules/units that are stored in the memory 702 and executed by the processor 701 to complete the present application.

Those skilled in the art will appreciate that fig. 8 is merely an example of a welding point setting device and does not constitute a limitation of a welding point setting device and may include more or fewer components than shown, or some components in combination, or different components such as input output devices, network access devices, buses, etc.

The embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps in the welding parameter setting method embodiment may be implemented.

In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the particular application and constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other ways. For example, the above-described apparatus/network device embodiments are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A welding work point setting method is characterized by comprising the following steps:

acquiring a parameter setting mode of a welding working point;

2. The welding work point setting method of claim 1 wherein the initial parameter offset comprises an offset of a weld energy parameter;

3. The welding work point setting method of claim 1, wherein said processing the initial parameter offset according to the parameter setting mode to generate a new parameter offset comprises:

when the parameter setting mode is the neglect mode, carrying out zero-returning processing on the initial parameter offset to generate the new parameter offset;

determining the initial parameter offset as the new parameter offset under the condition that the parameter setting mode is a band-associated mode;

4. The welding work point setting method of any of claims 1-3, wherein prior to obtaining the parameter setting mode for the welding work point, the method further comprises:

5. The welding operation point setting method according to claim 4, wherein the obtaining process parameters of a plurality of welding operation points satisfying the preset welding performance requirements according to the welding process test comprises:

6. The welding work point setting method of claim 5, wherein obtaining the upper weld work limit, the lower weld work limit, and the plurality of weld work test points at the current wire feed speed comprises:

and returning to the step of adjusting the process parameters of the starting point to generate the first parameters until the welding work upper boundary point and the welding work lower boundary point are obtained.

7. The welding work point setting method of claim 5, wherein after obtaining a subset of welding process parameters corresponding to each of the plurality of wire feed speeds, the method further comprises:

8. A welding work point setting device, characterized in that the device comprises:

the first acquisition module is used for acquiring a parameter setting mode of a welding working point; the parameter setting mode comprises an ignoring mode, a band-associated mode and a changing mode;

the processing module is used for processing the initial parameter offset according to the parameter setting mode to generate an updated parameter offset;

the generating module is used for searching the process parameters of the current welding working point from the welding process parameter set, and performing superposition processing on the updated parameter offset and the process parameters to generate static setting parameters of the current welding working point; the welding process parameter set comprises process parameters of a plurality of welding working points meeting preset welding performance requirements.

9. Welding work point setting device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.