CN113042861B - Aluminum alloy material multi-pulse group welding method, system, device and storage medium - Google Patents

Abstract

The invention discloses a multi-pulse group welding method, a system, a device and a storage medium for aluminum alloy materials, wherein the method comprises the following steps: determining the average welding current according to the thickness of the aluminum alloy material; determining a plurality of pulse groups for welding according to the welding average current, wherein the total average current of the pulse groups is the welding average current, and the average current of each pulse group is periodically changed in a step manner; configuring welding parameters according to each pulse group, wherein the pulse group parameters comprise pulse group duration time, pulse group peak current, pulse group base value current, pulse group peak time length, pulse group base value time length and pulse group number; and welding the aluminum alloy material according to the welding parameters. The invention is beneficial to overflow of bubbles in a molten pool when the aluminum alloy material is welded, reduces air holes in a welding line, avoids welding line cracks generated by sudden rise or dip of heat input in the welding process, improves the welding quality of the aluminum alloy material, and can be widely applied to the technical field of metal welding.

Description

Aluminum alloy material multi-burst welding method, system, device and storage medium

technical field

The invention relates to the technical field of metal welding, in particular to a multi-pulse group welding method, system, device and storage medium for aluminum alloy materials.

Background technique

Compared with ordinary ferrous metal materials, aluminum alloy materials have the characteristics of light weight, high strength, small specific gravity, good corrosion resistance and convenient recycling. Wide range of applications. However, compared with conventional ferrous metal materials, the physical and chemical properties and welding process performance of aluminum alloy materials have their own significant characteristics, and the difficulty of welding has always been the biggest obstacle restricting its wide use. The characteristics of aluminum alloys make it easy to form welding defects such as slag inclusions, incomplete fusion, incomplete penetration, shrinkage cavities, thermal cracks and hydrogen pores during welding.

There are two common methods of pulse current welding process, namely single pulse welding and double pulse welding. When single-pulse welding aluminum alloy, the bubbles in the molten pool are not easy to escape, and the mechanical properties will be affected after the weld is formed; when double-pulse welding aluminum alloy, the strong and weak pulse groups can have the effect of stirring the molten pool, which is beneficial to the formation of the molten pool. Bubbles escape, but there are too many pulse control parameters, parameter optimization is difficult, and there is no smooth transition between strong and weak pulse groups, the arc voltage jumps greatly, and there is more spatter. Based on the above method, someone proposed to use the step single pulse welding method to improve the forming effect of the weld. However, in practical applications, the step single pulse welding still cannot avoid welding defects such as pores and cracks in the weld, which affects the aluminum alloy material. welding quality.

Contents of the invention

The purpose of the present invention is to solve one of the technical problems in the prior art at least to a certain extent.

Therefore, an object of the embodiment of the present invention is to provide a multi-pulse group welding method for aluminum alloy materials. In this method, a plurality of pulse groups with stepwise changes in the average current are selected to form a multi-pulse group to weld aluminum alloy materials. On the one hand, It can produce a periodic stirring effect in the aluminum alloy molten pool, which is conducive to the overflow of bubbles in the molten pool and reduces the pores in the weld. On the other hand, the average current of the pulse group changes in steps to make the heat input during the welding process It is stable and avoids weld cracks caused by sudden rise or drop of heat input during the welding process, thereby improving the quality of weld forming and the welding quality of aluminum alloy materials.

Another object of the embodiments of the present invention is to provide a multi-pulse group welding system for aluminum alloy materials.

In order to achieve the above technical objectives, the technical solutions adopted in the embodiments of the present invention include:

In a first aspect, an embodiment of the present invention provides a multi-burst welding method for an aluminum alloy material, comprising the following steps:

Determine the average welding current according to the thickness of the aluminum alloy material;

A plurality of pulse groups used for welding are determined according to the welding average current, the total average current of the plurality of pulse groups is the welding average current, and the average current of each of the pulse groups shows a periodic step change;

Configuring welding parameters according to each of the bursts, the burst parameters include burst duration, burst peak current, burst base current, burst peak duration, burst base duration and the number of bursts;

The aluminum alloy material is welded according to the welding parameters.

Further, in one embodiment of the present invention, the step of determining the average welding current according to the thickness of the aluminum alloy material is specifically:

The diameter of the welding wire is determined according to the thickness of the aluminum alloy material, and the average welding current is determined according to the thickness of the aluminum alloy material and the diameter of the welding wire.

Further, in one embodiment of the present invention, the step of determining multiple pulse groups for welding according to the welding average current specifically includes:

determining a total average current of a plurality of pulse groups according to the welding average current;

determining the number of pulse groups, the average current of each of the pulse groups and the duration of the pulse groups according to the total average current of the plurality of pulse groups;

According to the average current and the duration of each pulse group, determine the peak current of each pulse group, the base value current of the pulse group, the duration of the peak value of the pulse group, the duration of the base value of the pulse group and the number of current pulses, thereby determining Multiple bursts for welding.

Further, in one embodiment of the present invention, the number of the bursts, the average current of each burst and the duration of the bursts are determined according to the following formula:

Among them, i=1,2,3...n, n represents the number of pulse groups, I represents the total average current of n pulse groups, I _i represents the average current of the i-th pulse group, T _i represents the i-th pulse group burst duration.

Further, in one embodiment of the present invention, the peak value current of each pulse group, the base value current of the pulse group, the peak duration of the pulse group, the base value duration of the pulse group and the number of current pulses are determined according to the following formula:

T _i =(t _ip +t _ib )m _i

Among them, i=1,2,3...n, n represents the number of pulse groups, m _i represents the number of current pulses of the i-th pulse group, I _i represents the average current of the i-th pulse group, T _i represents the i-th pulse group The pulse group duration of a pulse group, I _ip represents the pulse group peak current of the i-th pulse group, I _ib represents the pulse group base value current of the i-th pulse group, and t _ip represents the burst peak value of the i-th pulse group duration, t _ib represents the duration of the burst base value of the i-th burst.

Further, in an embodiment of the present invention, the configuration parameters also include wire feeding speed and welding torch walking speed.

Further, in one embodiment of the present invention, the step of welding the aluminum alloy material according to the welding parameters specifically includes:

start welding;

If the welding arc start is successful, the welding is carried out according to the welding parameters, and the welding arc is closed after the welding is completed; if the welding arc start is unsuccessful, the welding arc start is continued until the welding is completed.

In the second aspect, the embodiment of the present invention provides a multi-burst welding system for aluminum alloy materials, including:

The average welding current determination module is used to determine the average welding current according to the thickness of the aluminum alloy material;

A pulse group determination module, configured to determine a plurality of pulse groups used for welding according to the welding average current, the total average current of the plurality of pulse groups is the welding average current, and the average current of each of the pulse groups is Periodic step change;

The welding parameter configuration module is used to configure the welding parameters according to each of the pulse groups, and the pulse group parameters include the pulse group duration, the pulse group peak current, the pulse group base value current, the pulse group peak duration, and the pulse group base value Duration and number of bursts;

The welding module is used for welding the aluminum alloy material according to the welding parameters.

In a third aspect, an embodiment of the present invention provides a multi-burst welding device for aluminum alloy materials, including:

at least one processor;

at least one memory for storing at least one program;

When the at least one program is executed by the at least one processor, the at least one processor is made to implement the above-mentioned multi-burst welding method for aluminum alloy materials.

In a fourth aspect, the embodiment of the present invention also provides a computer-readable storage medium, which stores a processor-executable program, and the processor-executable program is used to execute the above-mentioned one when executed by the processor. Aluminum alloy material multi-burst welding method.

Advantage of the present invention and beneficial effect will be provided in part in the following description, part will become apparent from the following description, or understand by practice of the present invention:

In the embodiment of the present invention, the appropriate welding average current is determined according to the thickness of the aluminum alloy material to be welded, and then a plurality of pulse groups whose average current changes periodically in steps are determined according to the welding average current, and then the welding is performed according to the determined plurality of pulse groups. The parameters are configured to complete the welding of aluminum alloy materials. In the embodiment of the present invention, a plurality of pulse groups with stepwise changes in the average current are selected to form a multi-pulse group to weld aluminum alloy materials. On the one hand, a periodic stirring effect can be generated in the aluminum alloy molten pool, which is beneficial to the air bubbles in the molten pool. The overflow reduces the pores in the weld. On the other hand, the average current of the pulse group changes in steps to make the heat input stable during the welding process, avoiding the weld cracks caused by the sudden increase or decrease of the heat input during the welding process, thus The forming quality of the weld seam is improved, and the welding quality of the aluminum alloy material is improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the embodiments of the present invention are described below. It should be understood that the accompanying drawings in the following introductions are only for the convenience of clearly expressing the technology of the present invention For some embodiments in the solution, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a flow chart of the steps of a multi-burst welding method for aluminum alloy materials provided by an embodiment of the present invention;

2 is a schematic diagram of a current waveform for single-pulse welding of aluminum alloy materials in the related art;

3 is a schematic diagram of a current waveform of double-pulse welding of aluminum alloy materials in the related art;

Fig. 4 is a schematic diagram of current waveforms of stepped single-pulse welding of aluminum alloy materials in the related art;

Fig. 5 is a schematic diagram of a current waveform of a multi-pulse group welding method for an aluminum alloy material provided by an embodiment of the present invention;

Fig. 6 is a structural block diagram of an aluminum alloy material multi-pulse group welding system provided by an embodiment of the present invention;

Fig. 7 is a structural block diagram of an aluminum alloy material multi-pulse group welding device provided by an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. For the step numbers in the following embodiments, it is only set for the convenience of illustration and description, and the order between the steps is not limited in any way. The execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art sexual adjustment.

In the description of the present invention, multiple means two or more. If the first and the second are described only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implying Indicate the number of indicated technical features or implicitly indicate the sequence of indicated technical features. Also, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

Firstly, the welding method of aluminum alloy material in the related art is introduced and explained.

As shown in Figure 2, it is a schematic diagram of the current waveform of single-pulse welding of aluminum alloy materials in the related art, wherein, I _p represents the magnitude of the single-pulse peak current, I _b represents the magnitude of the single-pulse base value current, and _tp represents the duration of the single-pulse peak value, t _b represents the time length of the single pulse base value. Since the single pulse current cannot generate agitation in the aluminum alloy molten pool, the bubbles in the molten pool are not easy to overflow, and pores will be formed after the weld is formed, which will affect the mechanical properties of the aluminum alloy material.

Figure 3 is a schematic diagram of the current waveform of double-pulse welding of aluminum alloy materials in the related art. Strong pulses and weak pulses are used to form double pulses, where T _S represents the total time for maintaining the strong pulse group, and T _W represents the total time for maintaining the weak pulse group. Time, I _sp represents the peak current of the strong burst, I _sb represents the base current of the strong burst, t _sp represents the peak time length of the strong burst, t _sb represents the base time length of the strong burst, and I _wp represents the weak burst The magnitude of the peak current, I _wb represents the current magnitude of the base value of the weak pulse group, t _wp represents the peak time length of the weak pulse group, and t _wb represents the time length of the base value of the weak pulse group. When welding aluminum alloy with double pulses, the strong and weak pulse groups can stir the molten pool, which is conducive to the escape of bubbles in the molten pool, but there are too many pulse control parameters, and parameter optimization is difficult, and there is no smoothness between strong and weak pulses Transition, the arc voltage jumps greatly, there is more spatter, and defects such as cracks are prone to occur.

As shown in Figure 4, it is a schematic diagram of the current waveform of stepwise single-pulse welding of aluminum alloy materials in the related art, which is an improvement on the single-pulse welding current waveform shown in Figure 2, wherein, I _m represents the size of the step pulse current, and t _m represents The length of the step pulse time, and the meanings of other parameters are the same as those in Figure 2. Although step pulse welding can theoretically control the droplet transfer, in practical applications, welding defects such as pores and cracks will still occur.

Referring to Fig. 1, an embodiment of the present invention provides a multi-burst welding method for aluminum alloy materials, which specifically includes the following steps:

S101. Determine the average welding current according to the thickness of the aluminum alloy material.

Specifically, an appropriate average welding current can be determined according to the type and thickness of the aluminum alloy material, thereby improving welding quality.

Further as an optional implementation, the step of determining the average welding current according to the thickness of the aluminum alloy material is specifically:

The diameter of the welding wire is determined according to the thickness of the aluminum alloy material, and the average welding current is determined according to the thickness of the aluminum alloy material and the diameter of the welding wire.

In the embodiment of the invention, taking the welding of 6061 aluminum alloy flat material with a thickness of 3 mm as an example, the appropriate welding wire diameter is determined to be 1.2 mm, and the appropriate average welding current is determined to be 92A.

S102. Determine a plurality of pulse groups used for welding according to the average welding current, the total average current of the plurality of pulse groups is the average welding current, and the average current of each pulse group changes periodically in steps.

Specifically, in the embodiment of the present invention, a plurality of pulse groups with stepwise changes in the average current are selected to form a multi-pulse group to weld aluminum alloy materials. The overflow of air bubbles in the pool reduces the pores in the weld. On the other hand, the average current of the pulse group changes in steps to make the heat input stable during the welding process, avoiding the weld seam caused by the sudden increase or decrease of the heat input during the welding process. Cracks, thereby improving the quality of weld formation and the welding quality of aluminum alloy materials. Step S102 specifically includes the following steps:

S1021. Determine the total average current of multiple pulse groups according to the average welding current;

S1022. Determine the number of pulse groups, the average current of each pulse group, and the duration of the pulse group according to the total average current of multiple pulse groups;

S1023. Determine the peak current of each burst, the base current of the burst, the peak duration of the burst, the base duration of the burst, and the number of current pulses of each burst according to the average current of each burst and the duration of the burst, so as to determine the Multiple bursts for welding.

Further as an optional embodiment, the number of pulse groups, the average current of each pulse group and the duration of the pulse group are determined according to the following formula:

Among them, i=1,2,3...n, n represents the number of pulse groups, I represents the total average current of n pulse groups, I _i represents the average current of the i-th pulse group, T _i represents the i-th pulse group burst duration.

Specifically, in the embodiment of the present invention, the appropriate number of pulse groups, the average current of each pulse group, and the duration of the pulse group can be selected according to the aforementioned determined welding average current 92A and the above formula. Specifically, the number n of bursts is 4, the average current _I1 of the first burst is 118A, the duration _T1 of the burst is 120ms, the average current _I2 of the second burst is 102A, and the duration T1 of the burst is 102A. _T2 is 96ms, the average current _I3 of the third pulse group is 86A, the duration _T3 of the pulse group is 144ms, the average current _I4 of the fourth pulse group is 74A, and the duration _T4 of the pulse group is 180ms.

Further as an optional implementation mode, the peak value current of each pulse group, the base value current of the pulse group, the peak duration of the pulse group, the base value duration of the pulse group and the number of current pulses are determined according to the following formula:

T _i =(t _ip +t _ib )m _i

Among them, i=1,2,3...n, n represents the number of pulse groups, m _i represents the number of current pulses of the i-th pulse group, I _i represents the average current of the i-th pulse group, T _i represents the i-th pulse group The pulse group duration of a pulse group, I _ip represents the pulse group peak current of the i-th pulse group, I _ib represents the pulse group base value current of the i-th pulse group, and t _ip represents the burst peak value of the i-th pulse group duration, t _ib represents the duration of the burst base value of the i-th burst.

Specifically, according to the average current of each pulse group obtained above and the duration of the pulse group and the above formula, the appropriate peak current of each pulse group, the base value current of the pulse group, the peak value of the pulse group, and the base value of the pulse group can be selected. and the number of current pulses. In the embodiment of the present invention, the pulse group peak current I _1p of the first pulse group is 300A, the pulse group base value current I _1b is 70A, the pulse group peak duration T _1p is 2.5ms, and the pulse group base value duration T _1b is 9.5 ms. ms, current pulse number m ₁ is 10, the pulse group peak current I _2p of the second pulse group is 280A, the pulse group base value current I _2b is 55A, the pulse group peak duration T _2p is 2.5ms, the pulse group base value The duration T _2b is 9.5ms, the number of current pulses m ₂ is 8, the burst peak current I _3p of the third burst is 260A, the burst base current I _3b is 40A, and the burst peak duration T _3p is 2.5ms , the pulse group base value duration T _3b is 9.5ms, the number of current pulses m ₃ is 12, the pulse group peak current I _4p of the fourth pulse group is 240A, the pulse group base value current I _4b is 30A, and the pulse group peak duration T _4p is 2.5ms, the pulse group base duration T _4b is 9.5ms, and the number of current pulses m ₄ is 15.

As shown in Figure 5, it is a schematic diagram of a current waveform of an aluminum alloy material multi-pulse group welding method provided by an embodiment of the present invention. It should be noted that, in order to simplify the schematic diagram of the waveform, only two current pulses are shown in each pulse group , but actually the number of current pulses in each pulse group can be determined according to the actual situation (for example, in the embodiment of the present invention, the numbers of current pulses in the 4 pulse groups are 10, 8, 12 and 15, respectively).

It can be understood that, in the embodiment of the present invention, the four pulse groups are arranged in order according to the stepwise change of the average current from large to small, and then arranged in order according to the stepwise change of the average current from small to large after the fourth pulse group, thus forming One cycle (including 8 pulse groups), repeating this cycle can obtain multi-pulse groups in which the average current changes stepwise periodically.

S103. Configure the welding parameters according to each burst. The burst parameters include burst duration, burst peak current, burst base current, burst peak duration, burst base duration, and the number of bursts.

Specifically, each pulse group used for welding can be determined according to the various parameters obtained above, and then the welding parameters are configured according to the relevant parameters of each pulse group, so as to realize the control of the welding current pulse.

As a further optional implementation manner, the configuration parameters also include wire feeding speed and welding torch walking speed.

In the embodiment of the present invention, the wire feeding speed is 70 mm/s, and the welding torch travel speed is 8.5 mm/s.

S104, welding the aluminum alloy material according to welding parameters.

Specifically, the welding of the aluminum alloy can be automatically completed by controlling the welding current pulse, the wire feeding speed and the traveling speed of the welding torch according to the welding parameters. Step S104 specifically includes the following steps:

S1041, performing welding arc starting;

S1042. If the welding arc start is successful, perform welding according to the welding parameters, and perform welding arc stop after the welding is completed; if the welding arc start is unsuccessful, continue to perform welding arc start until the welding is completed.

In the embodiment of the present invention, the appropriate welding average current is determined according to the thickness of the aluminum alloy material to be welded, and then a plurality of pulse groups whose average current changes periodically in steps are determined according to the welding average current, and then the welding is performed according to the determined plurality of pulse groups. The parameters are configured to complete the welding of aluminum alloy materials. In the embodiment of the present invention, a plurality of pulse groups with stepwise changes in the average current are selected to form a multi-pulse group to weld aluminum alloy materials. On the one hand, a periodic stirring effect can be generated in the aluminum alloy molten pool, which is beneficial to the air bubbles in the molten pool. The overflow reduces the pores in the weld. On the other hand, the average current of the pulse group changes in steps to make the heat input stable during the welding process, avoiding the weld cracks caused by the sudden increase or decrease of the heat input during the welding process, thus The forming quality of the weld seam is improved, and the welding quality of the aluminum alloy material is improved. The embodiment of the present invention can achieve a good welding effect in the welding of aluminum alloy materials of various thicknesses, and can produce beautiful fish scale weld seams.

Referring to Fig. 6, an embodiment of the present invention provides a multi-burst welding system for aluminum alloy materials, including:

The average welding current determination module is used to determine the average welding current according to the thickness of the aluminum alloy material;

The pulse group determination module is used to determine a plurality of pulse groups used for welding according to the welding average current, the total average current of the multiple pulse groups is the welding average current, and the average current of each pulse group is periodically stepped;

The welding parameter configuration module is used to configure the welding parameters according to each pulse group. The pulse group parameters include the pulse group duration, the pulse group peak current, the pulse group base value current, the pulse group peak duration, the pulse group base value duration and the pulse group number;

The welding module is used for welding aluminum alloy materials according to welding parameters.

The content in the above-mentioned method embodiments is applicable to this system embodiment. The specific functions realized by this system embodiment are the same as those of the above-mentioned method embodiments, and the beneficial effects achieved are also the same as those achieved by the above-mentioned method embodiments.

Referring to Fig. 7, an embodiment of the present invention provides a multi-burst welding device for aluminum alloy materials, including:

at least one processor;

at least one memory for storing at least one program;

When the above-mentioned at least one program is executed by the above-mentioned at least one processor, the above-mentioned at least one processor is made to implement the above-mentioned multi-burst welding method for aluminum alloy materials.

The content in the above-mentioned method embodiment is applicable to this device embodiment, and the specific functions realized by this device embodiment are the same as those of the above-mentioned method embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned method embodiment.

An embodiment of the present invention also provides a computer-readable storage medium, which stores a processor-executable program, and the processor-executable program is used to execute the above-mentioned aluminum alloy material multi-burst burst when executed by the processor. Welding method.

A computer-readable storage medium according to an embodiment of the present invention can execute a multi-burst welding method for an aluminum alloy material provided by an embodiment of the method of the present invention, can execute any combination of implementation steps of the method embodiment, and has the corresponding methods of the method Functions and beneficial effects.

The embodiment of the present invention also discloses a computer program product or computer program, where the computer program product or computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device can read the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the method shown in FIG. 1 .

In some alternative implementations, the functions/operations noted in the block diagrams may occur out of the order noted in the operational diagrams. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/operations involved. Furthermore, the embodiments presented and described in the flowcharts of the present invention are provided by way of example in order to provide a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logical flow presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.

Furthermore, although the invention has been described in the context of functional modules, it should be understood that, unless stated to the contrary, one or more of the above-described functions and/or features may be integrated into a single physical device and/or one or more functions and/or features may be implemented in separate physical devices or software modules. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary to understand the present invention. Rather, given the attributes, functions and internal relationships of the various functional blocks in the devices disclosed herein, the actual implementation of the blocks will be within the ordinary skill of the engineer. Accordingly, those skilled in the art can implement the present invention set forth in the claims without undue experimentation using ordinary techniques. It is also to be understood that the particular concepts disclosed are illustrative only and are not intended to limit the scope of the invention which is to be determined by the appended claims and their full scope of equivalents.

If the above functions are realized in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the above-mentioned methods in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

The logic and/or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium, For use with instruction execution systems, devices, or devices (such as computer-based systems, systems including processors, or other systems that can fetch instructions from instruction execution systems, devices, or devices and execute instructions), or in conjunction with these instruction execution systems, devices or equipment used. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use in or in conjunction with an instruction execution system, device or device.

More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection with one or more wires (electronic device), portable computer disk case (magnetic device), random access memory (RAM), Read Only Memory (ROM), Erasable and Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the above-mentioned program can be printed, since the paper or other medium can be scanned, for example, optically, followed by editing, interpretation or other suitable means if necessary. Processing is performed to electronically obtain the above-mentioned programs, which are then stored in computer memory.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

In the above description of this specification, the description with reference to the terms "one embodiment/example", "another embodiment/example" or "some embodiments/example" means that the description is described in conjunction with the embodiment or example. A particular feature, structure, material, or characteristic is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the present invention. Equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims (7)

1. The multi-pulse group welding method for the aluminum alloy material is characterized by comprising the following steps of:

determining the average welding current according to the thickness of the aluminum alloy material;

determining a plurality of pulse groups for welding according to the welding average current, wherein the total average current of the pulse groups is the welding average current, and the average current of each pulse group is periodically changed in a step manner;

configuring welding parameters according to each pulse group, wherein the welding parameters comprise pulse group duration time, pulse group peak current, pulse group base value current, pulse group peak time length, pulse group base value time length and pulse group number;

welding the aluminum alloy material according to the welding parameters;

the step of determining a plurality of pulse groups for welding according to the welding average current specifically comprises the following steps:

determining a total average current of a plurality of pulse groups according to the welding average current;

determining the number of pulse groups, the average current of each pulse group and the pulse group duration according to the total average current of the pulse groups;

determining a pulse group peak current, a pulse group base value current, a pulse group peak time length, a pulse group base value time length and a current pulse number of each pulse group according to the average current and the pulse group duration of each pulse group, so as to determine a plurality of pulse groups used for welding;

the number of pulse groups, the average current of each pulse group and the pulse group duration are determined according to the following formula:

where i=1, 2,3 … n, n denotes the number of pulse groupsAnd n is not less than 3,

representing the total average current of n pulse groups, < >>

Represents the average current of the ith pulse group, < +.>

A pulse group duration representing an ith pulse group;

the pulse group peak current, the pulse group base value current, the pulse group peak time length, the pulse group base value time length and the current pulse number of each pulse group are determined according to the following formula:

wherein i=1, 2,3 … n, n representing the number of pulse groups and n being 3 or more,

indicating the number of current pulses of the ith pulse group, etc.>

Represents the average current of the ith pulse group, < +.>

Pulse group duration, which represents the ith pulse group,/-for the pulse group>

Pulse group peak current representing the ith pulse group,/->

Pulse group base current representing the ith pulse group, +.>

Pulse group peak duration indicating i-th pulse group,/->

Representing the burst base duration of the ith burst.

2. The method for multi-pulse group welding of aluminum alloy materials according to claim 1, wherein the step of determining the average welding current according to the thickness of the aluminum alloy materials comprises the following steps:

the diameter of the welding wire is determined according to the thickness of the aluminum alloy material, and the average welding current is determined according to the thickness of the aluminum alloy material and the diameter of the welding wire.

3. The method of claim 2, wherein the welding parameters further comprise wire feed speed and torch travel speed.

4. A method of multi-pulse group welding of aluminum alloy materials according to any of claims 1 to 3, characterized in that said step of welding aluminum alloy materials according to said welding parameters comprises in particular:

performing welding arc starting;

and if the welding arcing is successful, welding according to the welding parameters, welding receiving the arc after the welding is completed, and if the welding arcing is unsuccessful, continuing to perform the welding arcing until the welding is completed.

5. An aluminum alloy material multi-pulse group welding system, comprising:

the welding average current determining module is used for determining the welding average current according to the thickness of the aluminum alloy material;

the pulse group determining module is used for determining a plurality of pulse groups used for welding according to the welding average current, wherein the total average current of the pulse groups is the welding average current, and the average current of each pulse group is periodically changed in a step manner;

the welding parameter configuration module is used for configuring welding parameters according to each pulse group, wherein the welding parameters comprise pulse group duration time, pulse group peak current, pulse group base value current, pulse group peak time, pulse group base value time and pulse group number;

the welding module is used for welding the aluminum alloy material according to the welding parameters;

the pulse group determining module is specifically configured to:

determining a total average current of a plurality of pulse groups according to the welding average current;

determining the number of pulse groups, the average current of each pulse group and the pulse group duration according to the total average current of the pulse groups;

determining a pulse group peak current, a pulse group base value current, a pulse group peak time length, a pulse group base value time length and a current pulse number of each pulse group according to the average current and the pulse group duration of each pulse group, so as to determine a plurality of pulse groups used for welding;

the number of pulse groups, the average current of each pulse group and the pulse group duration are determined according to the following formula:

wherein i=1, 2,3 … n, n representing the number of pulse groups and n being 3 or more,

representing the total average current of n pulse groups, < >>

Represents the average current of the ith pulse group, < +.>

A pulse group duration representing an ith pulse group;

the pulse group peak current, the pulse group base value current, the pulse group peak time length, the pulse group base value time length and the current pulse number of each pulse group are determined according to the following formula:

wherein i=1, 2,3 … n, n representing the number of pulse groups and n being 3 or more,

indicating the number of current pulses of the ith pulse group, etc.>

Represents the average current of the ith pulse group, < +.>

Pulse group duration, which represents the ith pulse group,/-for the pulse group>

Pulse group peak current representing the ith pulse group,/->

Pulse group base current representing the ith pulse group, +.>

Pulse group peak duration indicating i-th pulse group,/->

Representing the burst base duration of the ith burst.

6. An aluminum alloy material multi-pulse group welding device, comprising:

at least one processor;

at least one memory for storing at least one program;

when the at least one program is executed by the at least one processor, the at least one processor is caused to implement an aluminum alloy material multi-pulse group welding method as claimed in any one of claims 1 to 4.

7. A computer readable storage medium in which a processor executable program is stored, characterized in that the processor executable program is for performing a multi-pulse group welding method of an aluminum alloy material as claimed in any one of claims 1 to 4 when being executed by a processor.

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