CN115889944A - Manual arc welding control method and control device - Google Patents
Manual arc welding control method and control device Download PDFInfo
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Abstract
The application relates to a manual arc welding control method and a control device. The method comprises the following steps: acquiring a starting signal, and detecting welding voltage and welding current according to the starting signal; if the welding voltage and the welding current are both zero, entering a standby state; wherein, in a standby state, the welding voltage is controlled to be a standby voltage; acquiring welding voltage in a standby state; if the welding voltage is less than the contact voltage, entering an arc striking preparation state; wherein, in the arc striking preparation state, the welding current is controlled to be arc striking current; if the arc striking current is detected within the preset time, entering an arc striking state; acquiring preset arc striking time in an arc striking state; if the transition time is equal to the arc striking time, entering a welding state; and controlling the welding current to carry out constant current welding in a welding state. By detecting the fault state in advance, the arc striking operation is started only when the arc welding is not in fault, and the arc striking performance and effect are improved.
Description
Technical Field
The application relates to the technical field of manual arc welding, in particular to a manual arc welding control method and a manual arc welding control device.
Background
With the development of welding technology, most of the existing manual arc welding adopts a pure hardware mode to realize the functions of arc striking control, welding control and the like. In the related art, the manual arc welding starts immediately after the arc welding is started, but the method causes poor arc starting effect when the manual arc welding fails.
Disclosure of Invention
In view of the above, it is necessary to provide a manual arc welding control method and a control apparatus capable of improving the arc striking effect.
In a first aspect, the present application provides a manual arc welding control method. The method comprises the following steps: acquiring a starting signal, and detecting welding voltage and welding current according to the starting signal; if the welding voltage and the welding current are both zero, entering a standby state; wherein, in the standby state, the welding voltage is controlled to be a standby voltage; acquiring the welding voltage in the standby state; if the welding voltage is less than the contact voltage, entering an arc striking preparation state; wherein, in the arc striking preparation state, the welding current is controlled to be arc striking current; if the arc striking current is detected within the preset time, entering an arc striking state; acquiring preset arc striking time in the arc striking state; if the transition time is equal to the arc striking time, entering a welding state; and controlling the welding current to carry out constant current welding in the welding state.
In one embodiment, the step of controlling the welding current to perform constant current welding in the welding state includes: acquiring the welding voltage; and if the welding voltage is greater than the preset voltage, controlling the welding current to be a constant value.
In one embodiment, the step of controlling the welding current to perform constant current welding in the welding state further includes: and if the welding voltage is smaller than the preset voltage, adjusting the welding current according to the maximum thrust current so as to carry out constant-current welding.
In one embodiment, the step of controlling the welding current to perform constant current welding in the welding state further includes: if the welding voltage is less than the adhesion voltage within a preset time period, entering an adhesion-preventing state; wherein in the anti-adhesion state, the welding current is controlled to be anti-adhesion current.
In one embodiment, the method further comprises: detecting the welding current in the adhesion prevention state; and if the welding current is zero, entering the standby state.
In one embodiment, the method further comprises: if the welding voltage or the welding current is not zero, entering a fault state; and under the fault state, controlling the welding voltage and the welding current to be zero and outputting a fault signal.
In one embodiment, the method further comprises: acquiring the welding current in the arc striking state; and if the welding current is zero, entering the standby state.
In one embodiment, the method further comprises: acquiring the welding current in the welding state; and if the welding current is zero, entering the standby state.
In a second aspect, the present application also provides a manual arc welding control apparatus for performing the manual arc welding control method according to the embodiment of the first aspect, the apparatus including: a main welding circuit for converting an input alternating current to a welding output; the driving circuit is connected with the main welding circuit and is used for driving and controlling the main welding circuit; a welding voltage detection circuit for detecting a welding voltage of the welding output; a welding current detection circuit for detecting a welding current of the welding output; the processor is respectively connected with the driving circuit, the welding voltage detection circuit and the welding current detection circuit, and is used for generating a driving signal according to the welding voltage and the welding current, and the driving signal is used for controlling the driving circuit to drive and control the welding main circuit.
In one embodiment, the apparatus further comprises: and the human-computer interaction module is connected with the processor and is used for setting welding parameters and displaying the parameters in real time.
According to the manual arc welding control method and the manual arc welding control device, after the starting signal is obtained, the welding voltage and the welding current are detected, and the manual arc welding control method and the manual arc welding control device enter a standby state under the condition that the welding voltage and the welding current are zero. When the welding voltage in the standby state is less than the contact voltage, the subsequent arc striking preparation state and the arc striking state are entered to start the arc striking operation. The method comprises the steps of detecting the welding voltage and the welding current after starting up, judging whether the current manual arc welding has faults or not, entering a standby state under the condition that the faults do not exist, and performing subsequent arc striking preparation state and arc striking state to finish arc striking operation. By detecting the fault state in advance, the arc striking operation of the manual arc welding is started under the condition that no fault occurs, and the arc striking performance and effect are improved.
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In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a manual arc welding control method according to an embodiment;
FIG. 2 is a schematic flow diagram illustrating the constant current welding process in one embodiment;
FIG. 3 is a schematic view of a process of entering a standby state in an anti-blocking state according to an embodiment;
FIG. 4 is a schematic diagram illustrating an embodiment of a process for entering a standby state during an arc initiation state;
FIG. 5 is a schematic diagram illustrating a process for entering a standby state during a welding state according to an embodiment;
FIG. 6 is a flowchart illustrating a manual arc welding control method according to another embodiment;
fig. 7 is a block diagram of a manual arc welding control device in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
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 to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," or "having," and the like, specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In one embodiment, as shown in fig. 1, there is provided a manual arc welding control method including the steps of:
step S110, a starting signal is obtained, and welding voltage and welding current are detected according to the starting signal. Specifically, when the manual arc welding is started, the fault detection is performed first. When the manual arc welding is started, a starting signal is generated to indicate the manual arc welding to be started. Under the condition of acquiring the starting signal, the detection of the welding voltage and the welding current is started, wherein the welding voltage and the welding current are the output voltage and the output current which are output by the manual arc welding in real time.
Step S120, if the welding voltage and the welding current are both zero, entering a standby state; wherein, in the standby state, the welding voltage is controlled to be the standby voltage. Specifically, when the welding voltage and the welding current are both zero, the corresponding circuit is not in fault, and the manual arc welding is controlled to enter a standby state. It will be appreciated that in some other embodiments, a threshold and return difference may be set to prevent false positives of faults in order to enhance immunity. In addition, the welding current and the welding voltage are detected in real time in the whole welding process, and when the detected welding voltage and the detected welding current are not proper, the manual arc welding enters a fault state. Meanwhile, in other embodiments, the temperature of the manual arc welding can be detected in real time, and when the temperature of the welding machine is too high, the welding machine can be switched to a fault state, so that the situations of device burnout and the like caused by overheating of the welding machine can be effectively prevented.
When the manual arc welding enters a standby state, the welding machine controls the duty ratio of pulses output to the driving circuit in the standby state, a voltage feedback mode is adopted, the standby voltage output by the welding machine is far lower than the voltage value of the no-load voltage of the welding machine, and the standby voltage can be set through a set human-computer interaction interface. For example, the standby voltage may be set to 24V or 12V, implementing a voltage reduction function. It can be understood that the no-load voltage of the normal arc striking of the welder is relatively high, about 60V to 80V, and the purpose of outputting the standby voltage with low voltage is to protect the personal safety of the welder operator and prevent the occurrence of electric shock accidents of the operator in the standby state.
In step S130, a welding voltage is acquired in a standby state. Specifically, in a standby state, the welding voltage is maintained at the standby voltage, and in this case, a certain low voltage output is maintained to correctly detect whether the welding rod is in contact with the workpiece, so that a no-load voltage is timely output to facilitate welding arc striking, and therefore the voltage of the welding voltage in the standby state needs to be obtained in real time.
Step S140, if the welding voltage is less than the contact voltage, entering an arc starting preparation state; wherein, in the arc striking preparation state, the welding current is controlled to be the arc striking current. Specifically, the magnitude of the contact voltage may be set through the human-computer interface, for example, the contact voltage may be set to 5V. When the welding rod is contacted with a workpiece, most of standby voltage (such as 12V or 24V) output by the welding machine in a standby state is shared by a main circuit of the welding machine, the welding voltage between the welding rod and the workpiece is small, and when the welding voltage is smaller than the contact voltage, the welding rod is contacted with the workpiece, and subsequent welding work needs to be carried out, and at the moment, the manual arc welding is controlled to enter an arc striking preparation state. In the arc starting preparation state, the welding machine adopts a current feedback mode, the arc starting current is given, and a user can set the arc starting current to be different values according to factors such as a welding workpiece and the like. It will be appreciated that the arc initiation current is greater than the current level at the time of welding in order to facilitate arc initiation.
Step S150, if arc striking current is detected within preset time, entering an arc striking state; and acquiring preset arc striking time in an arc striking state. Specifically, after the welding machine enters an arc striking preparation state, the timer starts to time, and the timed value is preset time preset by a user. If the welding current is detected to be changed into the arc striking current within the preset time, the stable contact between the welding rod and the workpiece is generated, and the arc striking state can be entered. It will be appreciated that the amount of arc initiation current and the amount of time preset can be varied to suit the requirements of different welders.
In an arc striking state, the welding machine adopts a current feedback mode, a given current Ig set by the welding machine is transited from arc striking current Iy to target welding current Ih, wherein the target welding current Ih is the current during constant current welding, the longest transition time T is arc striking time Ty, and Iy and Ih can be set through a human-computer interaction interface. The given current Ig can be calculated by the following formula: ig = Iy + T (Ih-Iy)/Ty, wherein T is 0. Ltoreq. Ty.
Step S160, if the transition time is equal to the arc striking time, the welding state is entered; and controlling the welding current to carry out constant current welding in a welding state. Specifically, after entering the arc striking state, a timer is used for calculating the transition time T, and when the transition time T is equal to the arc striking time Ty, the arc striking state is finished and the welding state is entered. In the welding state, the welder sets the welding current to a given current Ig to perform a constant current welding process.
According to the manual arc welding control method, after the starting signal is obtained, the welding voltage and the welding current are detected, and the manual arc welding control method enters a standby state under the condition that the welding voltage and the welding current are zero. When the welding voltage in the standby state is less than the contact voltage, the subsequent arc striking preparation state and the arc striking state are entered to start the arc striking operation. The method comprises the steps of detecting the welding voltage and the welding current after starting up, judging whether the current manual arc welding has faults or not, entering a standby state under the condition that the faults do not exist, and performing subsequent arc striking preparation state and arc striking state to finish arc striking operation. By detecting the fault state in advance, the arc striking operation of the manual arc welding is started under the condition that no fault occurs, and the arc striking performance and effect are improved.
In one embodiment, as shown in fig. 2, the step of controlling the welding current to perform constant current welding in the welding state comprises:
in step S161, a welding voltage is acquired. Specifically, during the constant current welding, detection is performed and the welding voltage is acquired.
And step S162, if the welding voltage is greater than the preset voltage, controlling the welding current to be a constant value. Specifically, a preset voltage (for example, 10V) is preset for welding, if the detected actual welding voltage is greater than the preset voltage, the welding is set to be in a constant current control mode, digital PID (proportional Integral Differential) operation is performed through the given welding current and the actually detected welding current, and the duty ratio of pulses output to the driving unit is controlled by using methods such as amplitude limiting, integral saturation preventing and the like and combining a fuzzy control theory, so that the output welding current is ensured to be a constant value, and thus constant current welding is completed.
In one embodiment, the step of controlling the welding current to perform constant current welding in the welding state further comprises: and if the welding voltage is less than the preset voltage, adjusting the welding current according to the maximum thrust current so as to carry out constant-current welding.
Specifically, if the actual welding voltage Us detected in the process of constant-current welding is smaller than the preset voltage Ut (for example, 10V), the welding machine needs to perform thrust control to prevent the welding rod from adhering to a workpiece, accelerate droplet transition and ensure good welding forming. The maximum thrust current It can be set, and the actually detected welding voltage is recorded as Us, then the calculation formula of the given current Ig set by the welder in the thrust phase is as follows: ig = Ih + It (Ut-Us)/Ut, wherein Us is more than or equal to 0 and less than or equal to Ut, and Ih is a target welding current in constant current welding.
In one embodiment, the step of controlling the welding current to perform constant current welding in the welding state further comprises: if the welding voltage is less than the adhesion voltage within a preset time period, entering an adhesion-preventing state; wherein in the anti-adhesion state, the welding current is controlled to be the anti-adhesion current.
Specifically, in the normal welding process, the current of the welding arc is kept constant (the current is increased in the thrust state), the welding voltage is changed or even is close to zero sometimes, but the time for continuously maintaining the welding voltage at the low voltage is short (less than 10 ms), if the welding voltage is detected to be maintained at the low voltage value in a long time, the possibility that the welding rod is adhered to the workpiece can be judged, and special treatment is needed to be carried out at the moment to prevent the welding rod from adhering to the workpiece. In the welding state, the actually output welding voltage is continuously detected in real time, and if the welding voltage is continuously detected to be smaller than the adhesion voltage (the adhesion voltage can be set) within a preset time period (for example, 20 ms), the manual arc welding is controlled to enter the adhesion prevention state. In the anti-adhesion state, the welding current is maintained at a very small current value, namely, the welding current is maintained at the anti-adhesion current value, so that the welding rod is maintained at a certain temperature, and a user can conveniently separate the welding rod from a workpiece. If the welding machine still keeps larger welding current or directly reduces the welding current to zero, the welding rod and the workpiece are welded together and are not easy to separate. It is understood that the magnitude of the anti-sticking current can be set according to the size of the welding rod.
In one embodiment, as shown in fig. 3, the manual arc welding control method further includes:
in step S171, the welding current is detected in the adhesion prevention state. Specifically, the welding machine can detect the welding current in real time in an anti-adhesion state, and whether welding is finished or not is judged according to the welding current.
In step S172, if the welding current is zero, the welding system enters a standby state. Specifically, when the welding current is detected to be zero, the user indicates that the welding rod is lifted, the welding rod is separated from the workpiece, the anti-adhesion process is finished, the welding machine is controlled to enter a standby state at the moment, and the welding voltage output by the welding machine is controlled to be the standby voltage.
In one embodiment, the manual arc welding control method further includes: if the welding voltage or the welding current is not zero, entering a fault state; and in a fault state, controlling the welding voltage and the welding current to be zero, and outputting a fault signal. Specifically, when the manual arc welding is started, and the situation that the welding voltage or the welding current is not zero is detected, the situation that the corresponding detection circuit has a fault is indicated, and the welding machine is controlled to enter a fault state. And in a fault state, the driving output is closed, so that the welding voltage and the welding current which are output currently are zero, the damage to the welding machine caused by the fault is avoided or reduced, a fault signal is output, and corresponding fault information is displayed on a human-computer interaction interface to prompt a user to maintain.
In one embodiment, as shown in fig. 4, the manual arc welding control method further includes:
and step S181, obtaining the welding current in the arc striking state. Specifically, the welding machine can still detect the output welding current in real time in the arc striking state so as to judge whether the arc striking process needs to be interrupted.
In step S182, if the welding current is zero, the welding system enters a standby state. Specifically, when the welding current is detected to be zero, it is indicated that the user has lifted the welding rod, so that the welding rod is separated from the workpiece, and the welding process is finished, and at the moment, the welding machine is controlled to enter a standby state, and the welding voltage output by the welding machine is controlled to be the standby voltage.
In one embodiment, as shown in fig. 5, the manual arc welding control method further includes:
in step S191, a welding current is acquired in the welding state. Specifically, the welding machine can detect the magnitude of the output welding current in real time in a welding state so as to judge whether the welding process needs to be interrupted.
In step S192, the welding apparatus enters a standby state when the welding current is zero. Specifically, when the welding current is detected to be zero in the welding state, the user is indicated that the welding rod is lifted, the welding rod is separated from the workpiece, the welding process is finished, the welding machine is controlled to enter the standby state at the moment, and the welding voltage output by the welding machine is controlled to be the standby voltage.
Referring to fig. 6, the manual arc welding control method according to the present invention will be described in detail with an exemplary embodiment. When a welding machine for manual arc welding is started, firstly, welding voltage and welding current are detected according to a starting signal so as to judge whether the current welding machine has faults or not. And if the welding machine has a fault, controlling the welding machine to enter a fault state, namely controlling the welding voltage and the welding current to be zero, and outputting a fault signal. And meanwhile, continuously judging whether the fault disappears, and if the fault disappears, controlling the welding machine to enter a standby state to enable the welding machine to output standby voltage. If the fault does not disappear, the device is always in a fault state. And if the current welding machine is judged to have no fault, directly entering a standby state.
And after entering the standby state, detecting the welding voltage in real time in the standby state so as to detect whether the welding rod is in contact with the workpiece. If the welding voltage is less than the contact voltage, the welding rod is in contact with the workpiece, and the arc starting preparation state is entered. If the welding voltage is larger than or equal to the contact voltage, the welding rod is not contacted with the workpiece, and the welding machine is always in a standby state at the moment. In the arc striking preparation state, whether arc striking current is detected within preset time needs to be judged, and if the arc striking current is detected, the welding machine is controlled to enter an arc striking state. And if not, controlling the welding machine to enter a standby state. In the arc striking state, arc striking current control and arc striking time control can be carried out, and meanwhile, whether welding current exists needs to be detected in real time to judge whether the welding rod leaves a weldment or not. If the welding current is not detected, the arc striking welding rod is separated from the weldment, and the welding machine is controlled to enter a standby state. If the detected transition time is equal to the arc striking time in the arc striking state, the arc striking waiting is finished, and the next welding state needs to be entered.
In a welding state, the welding machine can execute welding current control, thrust control, welding rod adhesion judgment and welding current existence judgment. If the welding current is not detected, the welding rod is separated from the workpiece, and the welding machine is controlled to enter a standby state. And if the welding voltage is detected to be smaller than the adhesion voltage in the preset time period, judging that the welding rod is adhered, and controlling the welding machine to enter an anti-adhesion state. And in the anti-adhesion state, controlling the welding current to be a low-current adhesion current, and simultaneously detecting whether the welding current exists or not in real time. If the welding current is not detected, the welding rod is separated from the workpiece, and the welding machine is controlled to enter a standby state. By the aid of the manual arc welding control method, the manual arc welding can have multiple functions so as to meet different welding requirements. And through the manual arc welding control method of the embodiment of the application, the arc striking performance, the thrust performance, the anti-adhesion performance and other performances are excellent.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the application also provides a manual arc welding control device for realizing the manual arc welding control method. The solution of the apparatus is similar to the solution described in the above method, so the specific limitations in one or more embodiments of the manual arc welding control apparatus provided below can be referred to the limitations of the manual arc welding control method in the above, and are not described herein again.
In one embodiment, as shown in fig. 7, the present application also proposes a manual arc welding control apparatus for performing the manual arc welding control method in the above-described embodiment, the manual arc welding control apparatus including a welding main circuit, a driving circuit, a welding voltage detection circuit, a welding current detection circuit, and a processor, wherein: the welding main circuit is used for converting input alternating current into welding output; the driving circuit is connected with the welding main circuit and is used for driving and controlling the welding main circuit; the welding voltage detection circuit is used for detecting welding voltage output by welding; the welding current detection circuit is used for detecting welding current output by welding; the processor is respectively connected with the driving circuit, the welding voltage detection circuit and the welding current detection circuit, and is used for generating a driving signal according to the welding voltage and the welding current, and the driving signal is used for controlling the driving circuit to drive and control the welding main circuit.
Specifically, an input power supply of the main welding circuit can be 220V or 380V alternating current, and the main welding circuit comprises modules such as a primary rectifying and filtering circuit, an inverter circuit, a transformer circuit, a secondary rectifying circuit and a filtering circuit, and is used for converting the alternating current into welding output after voltage reduction and rectification. The welding output is used for outputting proper welding voltage and welding current and is applied to the welding handle and the welding rod. The welding voltage detection circuit is used for isolating and conditioning the output welding voltage and generating a voltage signal which can be collected by the processor so as to be detected by the ADC. The welding current detection circuit is used for isolating and conditioning the output welding voltage and generating a voltage signal which can be collected by the processor so as to be detected by the ADC. The processor can be an ARM core chip, detects the output welding voltage and welding current in real time through built-in welding parameters, and generates a pulse driving signal by adopting a corresponding algorithm according to specific process requirements to control the welding main circuit to output proper welding voltage and welding current for manual arc welding. It can be understood that the processor can execute the functions of voltage reduction control, arc striking control, welding process control, thrust control, adhesion prevention control and the like in the above embodiments, and high-quality hand arc welding can be completed through the control cooperation of different modules.
The manual arc welding control device can detect the welding voltage and the welding current after acquiring the starting signal, and enters a standby state under the condition that the welding voltage and the welding current are both zero. When the welding voltage in the standby state is less than the contact voltage, the subsequent arc striking preparation state and the arc striking state are entered to start the arc striking operation. The method comprises the steps of detecting the welding voltage and the welding current after starting up, judging whether the current manual arc welding has a fault, entering a standby state under the condition that the fault does not exist, and performing subsequent arc striking preparation state and arc striking state to finish arc striking operation. By detecting the fault state in advance, the arc striking operation of the manual arc welding is started under the condition that no fault occurs, and the arc striking performance and effect are improved.
In one embodiment, as shown in fig. 7, the manual arc welding control apparatus further includes: and the human-computer interaction module is connected with the processor and is used for setting welding parameters and displaying the parameters in real time. The human-computer interaction module comprises a touch screen, a display screen and the like, a user can set welding parameters in real time through the touch screen, and the welding parameters are displayed through the display screen, so that the user can conveniently control and select the welding parameters during manual arc welding. In some other embodiments, the human-computer interaction module may not be separately set, and corresponding welding parameters may be set when the device leaves a factory, so as to be used for subsequent welding by a user.
All or part of each module in the manual arc welding control device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims (10)
1. A manual arc welding control method, characterized by comprising:
acquiring a starting signal, and detecting welding voltage and welding current according to the starting signal;
if the welding voltage and the welding current are both zero, entering a standby state; wherein, in the standby state, the welding voltage is controlled to be a standby voltage;
acquiring the welding voltage in the standby state;
if the welding voltage is less than the contact voltage, entering an arc striking preparation state; wherein, in the arc striking preparation state, the welding current is controlled to be arc striking current;
if the arc striking current is detected within the preset time, entering an arc striking state; acquiring preset arc striking time in the arc striking state;
if the transition time is equal to the arc striking time, entering a welding state; and controlling the welding current to perform constant current welding in the welding state.
2. The manual arc welding control method according to claim 1, wherein the step of controlling the welding current to perform constant current welding in the welding state includes:
acquiring the welding voltage;
and if the welding voltage is greater than the preset voltage, controlling the welding current to be a constant value.
3. The manual arc welding control method according to claim 2, wherein the step of controlling the welding current to perform constant current welding in the welding state further includes:
and if the welding voltage is smaller than the preset voltage, adjusting the welding current according to the maximum thrust current so as to carry out constant-current welding.
4. The manual arc welding control method according to claim 3, wherein the step of controlling the welding current to perform constant current welding in the welding state further includes:
if the welding voltage is less than the adhesion voltage within a preset time period, entering an adhesion-preventing state; wherein in the anti-adhesion state, the welding current is controlled to be anti-adhesion current.
5. The manual arc welding control method according to claim 4, further comprising:
detecting the welding current in the anti-adhesion state;
and if the welding current is zero, entering the standby state.
6. The manual arc welding control method according to any one of claims 1 to 5, characterized by further comprising:
if the welding voltage or the welding current is not zero, entering a fault state; and under the fault state, controlling the welding voltage and the welding current to be zero and outputting a fault signal.
7. The manual arc welding control method according to claim 6, further comprising:
acquiring the welding current in the arc striking state;
and if the welding current is zero, entering the standby state.
8. The manual arc welding control method according to claim 6, further comprising:
acquiring the welding current in the welding state;
and if the welding current is zero, entering the standby state.
9. A manual arc welding control apparatus for performing the manual arc welding control method of any one of claims 1 to 8, the apparatus comprising:
a main welding circuit for converting an input alternating current to a welding output;
the driving circuit is connected with the main welding circuit and is used for driving and controlling the main welding circuit;
a welding voltage detection circuit for detecting a welding voltage of the welding output;
a welding current detection circuit for detecting a welding current of the welding output;
the processor is respectively connected with the driving circuit, the welding voltage detection circuit and the welding current detection circuit, and is used for generating a driving signal according to the welding voltage and the welding current, and the driving signal is used for controlling the driving circuit to drive and control the welding main circuit.
10. The manual arc welding control apparatus according to claim 9, further comprising: and the human-computer interaction module is connected with the processor and is used for setting welding parameters and displaying the parameters in real time.
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| CN202310011291.3A CN115889944A (en) | 2023-01-05 | 2023-01-05 | Manual arc welding control method and control device |
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