Manual arc welding control method and control device

Abstract

The present application relates to a manual arc welding control method and control device. The method comprises: obtaining a power-on signal, and detecting the welding voltage and welding current according to the power-on signal; if the welding voltage and welding current are both zero, entering a standby state; wherein, in the standby state, the welding voltage is controlled to be the standby voltage; in the standby state, the welding voltage is obtained; if the welding voltage is less than the contact voltage, the arc striking preparation state is entered; wherein, in the arc striking preparation state, the welding current is controlled to be the arc striking current; if the arc striking current is detected within a preset time, the arc striking state is entered; wherein, in the arc striking state, a preset arc striking time is obtained; if the transition time is equal to the arc striking time, the welding state is entered; wherein, in the welding state, the welding current is controlled to perform constant current welding. By pre-detecting the fault state, the manual arc welding starts the arc striking operation only when no fault occurs, thereby improving the arc striking performance and effect.

Description

Technical Field

[0001] The present application relates to the technical field of manual arc welding, and in particular to a manual arc welding control method and control device. Background Art

[0002] With the development of welding technology, most of the current manual arc welding uses pure hardware to achieve arc ignition control and welding control functions. After the manual arc welding in the related technology is turned on, the arc ignition and other operations will be started immediately, but this method will lead to poor arc ignition effect when the manual arc welding fails. Summary of the invention

[0003] Based on this, it is necessary to provide a manual arc welding control method and control device that can improve the arc starting effect in response to the above technical problems.

[0004] In the first aspect, the present application provides a manual arc welding control method. The method includes: obtaining a power-on signal, and detecting a welding voltage and a welding current according to the power-on 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; in the standby state, the welding voltage is obtained; if the welding voltage is less than the contact voltage, the arc-starting preparation state is entered; wherein, in the arc-starting preparation state, the welding current is controlled to be an arc-starting current; if the arc-starting current is detected within a preset time, the arc-starting state is entered; wherein, in the arc-starting state, a preset arc-starting time is obtained; if the transition time is equal to the arc-starting time, the welding state is entered; wherein, in the welding state, the welding current is controlled to perform constant current welding.

[0005] In one of the embodiments, the step of controlling the welding current to perform constant current welding in the welding state includes: obtaining the welding voltage; if the welding voltage is greater than a preset voltage, controlling the welding current to be a constant value.

[0006] In one of the embodiments, 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 preset voltage, adjusting the welding current according to the maximum thrust current to perform constant current welding.

[0007] In one of the embodiments, 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 anti-adhesion state; wherein, in the anti-adhesion state, the welding current is controlled to be an anti-adhesion current.

[0008] In one of the embodiments, the method further includes: detecting the welding current in the anti-adhesion state; if the welding current is zero, entering the standby state.

[0009] In one of the embodiments, the method further includes: if the welding voltage or the welding current is not zero, entering a fault state; wherein, in the fault state, the welding voltage and the welding current are controlled to be zero, and a fault signal is output.

[0010] In one of the embodiments, the method further includes: acquiring the welding current in the arc striking state; if the welding current is zero, entering the standby state.

[0011] In one of the embodiments, the method further includes: acquiring the welding current in the welding state; if the welding current is zero, entering the standby state.

[0012] In a second aspect, the present application also provides a manual arc welding control device for executing the manual arc welding control method described in the embodiment of the first aspect, the device comprising: a welding main circuit, the welding main circuit being used to convert input alternating current into a welding output; a drive circuit, the drive circuit being connected to the welding main circuit, the drive circuit being used to drive and control the welding main circuit; a welding voltage detection circuit, the welding voltage detection circuit being used to detect the welding voltage of the welding output; a welding current detection circuit, the welding current detection circuit being used to detect the welding current of the welding output; a processor, the processor being connected to the drive circuit, the welding voltage detection circuit and the welding current detection circuit respectively, the processor being used to generate a drive signal according to the welding voltage and the welding current, the drive signal being used to control the drive circuit to drive and control the welding main circuit.

[0013] In one of the embodiments, the device further includes: a human-computer interaction module, the human-computer interaction module is connected to the processor, and the human-computer interaction module is used to set welding parameters and display the parameters in real time.

[0014] The above-mentioned manual arc welding control method and control device will detect the welding voltage and welding current after obtaining the power-on signal, and will enter the standby state only when the welding voltage and welding current are both zero. Only when the welding voltage in the standby state is less than the contact voltage, will it enter the subsequent arc-starting preparation state and arc-starting state to start the arc-starting operation. By detecting the size of the welding voltage and welding current after starting up, it is determined whether the current manual arc welding has a fault. If there is no fault, it will enter the standby state, and perform the subsequent arc-starting preparation state and arc-starting state to complete the arc-starting operation. By pre-detecting the fault state, the manual arc welding will start the arc-starting operation only when there is no fault, thereby improving the arc-starting performance and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of a flow chart of a manual arc welding control method in one embodiment;

[0017] Figure 2 A schematic diagram of a process for constant current welding in one embodiment;

[0018] Figure 3 is a schematic diagram of a process of entering a standby state in an anti-adhesion state in an embodiment;

[0019] Figure 4 It is a schematic diagram of a process of entering a standby state in an arc striking state in one embodiment;

[0020] Figure 5 A schematic diagram of a process of entering a standby state in a welding state in one embodiment;

[0021] Figure 6 A schematic diagram of a flow chart of a manual arc welding control method in another embodiment;

[0022] Figure 7 Schematic diagram of a module of a manual arc welding control device in one embodiment. DETAILED DESCRIPTION

[0023] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0025] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0026] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0027] In one embodiment, Figure 1 As shown, a manual arc welding control method is provided, comprising the following steps:

[0028] Step S110, obtaining a power-on signal, and detecting the welding voltage and welding current according to the power-on signal. Specifically, when the manual arc welding is turned on, a fault detection will be performed first. When the manual arc welding is turned on, a power-on signal will be generated to indicate that the manual arc welding is turned on. When the power-on signal is obtained, the welding voltage and welding current will be detected, wherein the welding voltage and welding current are the magnitude of the output voltage and output current of the manual arc welding in real time.

[0029] Step S120, if the welding voltage and the welding current are both zero, then enter the 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, it means that the corresponding circuit has not failed, and the manual arc welding is controlled to enter the standby state. It can be understood that in some other embodiments, in order to enhance the anti-interference ability, a threshold value and a hysteresis can be set to prevent false fault alarms. In addition, in the entire welding process described later, the welding current and the welding voltage will also be detected in real time. When the detected welding voltage and welding current are of inappropriate size, the manual arc welding will enter the fault state. At the same time, in some other embodiments, the temperature of the manual arc welding can also be detected in real time. When the temperature of the welding machine is too high, it will also switch to the fault state, which can effectively prevent the burning of components caused by overheating of the welding machine.

[0030] When the manual arc welding enters the standby state, in the standby state, the welding machine controls the duty cycle of the pulse output to the drive circuit and adopts the voltage feedback mode to make the standby voltage output by the welding machine much lower than the voltage value of the no-load voltage of the welding machine. The standby voltage can be set through the set human-machine interaction interface. For example, the standby voltage can be set to 24V or 12V to achieve the voltage reduction function. It is understandable that the no-load voltage of the normal arc of the welding machine is relatively high, about 60V to 80V. The purpose of outputting a low voltage standby voltage is to protect the personal safety of the welding machine operator and prevent electric shock accidents in the standby state.

[0031] Step S130, obtaining the welding voltage in the standby state. Specifically, in the standby state, the welding voltage will be maintained at the magnitude of the standby voltage. In this case, maintaining a certain low voltage output can correctly detect whether the electrode is in contact with the workpiece, so as to output the no-load voltage in time to facilitate welding arc initiation. Therefore, it is necessary to obtain the voltage magnitude of the welding voltage in the standby state in real time.

[0032] Step S140, if the welding voltage is less than the contact voltage, the arc-starting preparation state is entered; wherein, in the arc-starting preparation state, the welding current is controlled to be the arc-starting current. Specifically, the size of the contact voltage can be set through the human-computer interaction interface, for example, the contact voltage can be set to 5V. When the electrode contacts the workpiece, most of the standby voltage (such as 12V or 24V) output by the welding machine in the standby state is shared by the main circuit of the welding machine, and the welding voltage between the electrode and the workpiece is small. When the welding voltage is less than the contact voltage, it means that the electrode is in contact with the workpiece and subsequent welding work is required. At this time, the manual arc welding is controlled to enter the arc-starting preparation state. In the arc-starting preparation state, the welding machine adopts the current feedback mode and gives the arc-starting current. The user can set the arc-starting current to different values ​​according to factors such as the welding workpiece. It can be understood that the arc-starting current is greater than the current during welding, and the purpose is to facilitate arc starting.

[0033] Step S150, if the arc striking current is detected within the preset time, the arc striking state is entered; wherein, in the arc striking state, the preset arc striking time is obtained. Specifically, when the welding machine enters the arc striking preparation state, the timer will start timing, and this timing value is the preset time set by the user. If it is detected that the welding current becomes the size of the arc striking current within the preset time, it means that a stable contact is generated between the electrode and the workpiece, and the arc striking state can be entered at this time. It can be understood that the size of the arc striking current and the length of the preset time can be changed to suit the requirements of different welding machines.

[0034] In the arc striking state, the welding machine adopts the current feedback mode, and the given current Ig set by the welding machine transitions from the arc striking current Iy to the target welding current Ih, where the target welding current Ih is the current size during constant current welding, and the transition time T is the longest arc striking time Ty, where both Iy and Ih can be set through the human-computer interaction interface. The given current Ig can be calculated by the following formula: Ig=Iy+T*(Ih-Iy) / Ty, where 0≤T≤Ty.

[0035] Step S160, if the transition time is equal to the arc striking time, then enter the welding state; wherein, in the welding state, the welding current is controlled to perform constant current welding. Specifically, after entering the arc striking state, a timer is used to calculate the transition time T. When the transition time T is equal to the arc striking time Ty, the arc striking state is terminated 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.

[0036] In the above-mentioned manual arc welding control method, after obtaining the power-on signal, the welding voltage and welding current will be detected, and the standby state will not be entered until the welding voltage and welding current are both zero. When the welding voltage in the standby state is less than the contact voltage, the subsequent arc-starting preparation state and arc-starting state will not be entered to start the arc-starting operation. By detecting the size of the welding voltage and welding current after starting the machine, it is determined whether the current manual arc welding has a fault. If there is no fault, the standby state will be entered, and the subsequent arc-starting preparation state and arc-starting state will be performed to complete the arc-starting operation. By pre-detecting the fault state, the manual arc welding will not start the arc-starting operation until there is no fault, thereby improving the arc-starting performance and effect.

[0037] In one embodiment, Figure 2 As shown, in the welding state, the steps of controlling the welding current to perform constant current welding include:

[0038] Step S161, obtaining welding voltage. Specifically, during constant current welding, detection is performed to obtain welding voltage.

[0039] Step S162, if the welding voltage is greater than the preset voltage, the welding current is controlled to be a constant value. Specifically, a preset voltage (e.g., 10V) is preset for welding. If the actual welding voltage detected is greater than the preset voltage, the welding is set to a constant current control mode. A digital PID (Proportion Integral Differential) operation is performed using a given welding current and the actual detected welding current. Limiting is used to prevent integral saturation and other methods combined with fuzzy control theory to control the duty cycle of the pulse output to the drive unit to ensure that the output welding current is a constant value, thereby completing constant current welding.

[0040] In one embodiment, in the welding state, the step of controlling the welding current to perform constant current welding further includes: if the welding voltage is less than a preset voltage, adjusting the welding current according to the maximum thrust current to perform constant current welding.

[0041] Specifically, if the actual welding voltage Us is detected to be less than the preset voltage Ut (for example, 10V) during constant current welding, the welder needs to perform thrust control to prevent the electrode from sticking to the workpiece and accelerate the molten droplet transition to ensure better welding formation. The maximum thrust current It can be set, and the actual detected welding voltage is recorded as Us. The calculation formula for the given current Ig set by the welder in the thrust stage is as follows: Ig = Ih + It* (Ut-Us) / Ut, where 0≤Us≤Ut, and Ih is the target welding current during constant current welding.

[0042] In one embodiment, in the welding state, the step of controlling the welding current to perform constant current welding also includes: if the welding voltage is less than the adhesion voltage within a preset time period, entering the anti-adhesion state; wherein, in the anti-adhesion state, the welding current is controlled to be the anti-adhesion current.

[0043] Specifically, in the normal welding process, the current of the welding arc remains constant (it will increase slightly under the thrust state). Although the welding voltage is changing and sometimes even close to zero, the time for the welding voltage to be continuously maintained at a low voltage is very short (less than 10ms). If the welding voltage is detected to be maintained at a low voltage value for a long time, it can be judged that the welding rod has the possibility of sticking to the workpiece. At this time, special treatment is required to prevent the welding rod from sticking to the workpiece. In the welding state, the actual output welding voltage will be continuously detected in real time. If the welding voltage is continuously detected to be less than the adhesion voltage (the adhesion voltage size can be set) within a preset time period (for example, 20ms), the manual arc welding will be controlled to enter the anti-adhesion state. In the anti-adhesion state, the welding current is maintained at a very small current value, that is, maintained at the anti-adhesion current size, so that the welding rod is maintained at a certain temperature, which is convenient for the user to separate the welding rod from the workpiece. If the welding machine still maintains a large welding current or directly reduces the welding current to zero, the welding rod will be welded to the workpiece and is not easy to separate. It can be understood that the size of the anti-adhesion current can be set according to the size of the welding rod.

[0044] In one embodiment, Figure 3 As shown, the manual arc welding control method also includes:

[0045] Step S171, detecting welding current in the anti-adhesion state. Specifically, the welding machine will still detect the magnitude of welding current in real time in the anti-adhesion state, and determine whether welding is finished according to the magnitude of welding current.

[0046] Step S172, if the welding current is zero, then enter the standby state. Specifically, when it is detected that the welding current is zero, it means that the user has lifted the welding rod, separated the welding rod from the workpiece, and ended the anti-adhesion process. At this time, the welding machine is controlled to enter the standby state, and the welding voltage output by the welding machine is controlled to be the standby voltage.

[0047] In one embodiment, the manual arc welding control method further includes: if the welding voltage or welding current is not zero, a fault state is entered; wherein, in the fault state, the welding voltage and welding current are controlled to be zero, and a fault signal is output. Specifically, when the manual arc welding is turned on, if it is detected that the welding voltage or welding current is not zero, it means that there is a fault in the corresponding detection circuit, and the welding machine is controlled to enter a fault state. In the fault state, the drive output will be turned off, so that the currently output welding voltage and welding current are zero, thereby avoiding or reducing the damage to the welding machine caused by the fault, and at the same time, a fault signal is output, and the corresponding fault information is displayed on the human-computer interaction interface to prompt the user to perform maintenance.

[0048] In one embodiment, Figure 4 As shown, the manual arc welding control method also includes:

[0049] Step S181, obtaining welding current in the arc striking state. Specifically, the welding machine will still detect the magnitude of the output welding current in real time in the arc striking state to determine whether the arc striking process needs to be interrupted.

[0050] Step S182, if the welding current is zero, then enter the standby state. Specifically, when it is detected that the welding current is zero, it means that the user has lifted the welding rod, separated the welding rod from the workpiece, and ended the welding process. At this time, the welding machine is controlled to enter the standby state, and the welding voltage output by the welding machine is controlled to be the standby voltage.

[0051] In one embodiment, Figure 5 As shown, the manual arc welding control method also includes:

[0052] Step S191, obtaining welding current in welding state. Specifically, the welding machine will still detect the magnitude of the output welding current in real time in welding state to determine whether the welding process needs to be interrupted.

[0053] Step S192, if the welding current is zero, then enter the standby state. Specifically, when the welding current is detected to be zero in the welding state, it means that the user has lifted the welding rod, separated the welding rod from the workpiece, and ended the welding process. At this time, the welding machine is controlled to enter the standby state, and the welding voltage output by the welding machine is controlled to be the standby voltage.

[0054] like Figure 6As shown, the manual arc welding control method of the present application is described in detail with a specific embodiment below. When the manual arc welding machine is turned on, the welding voltage and welding current are first detected according to the power-on signal to determine whether the current welding machine has a fault. If it is determined that the welding machine has a fault, the welding machine is controlled to enter a fault state, that is, the welding voltage and welding current are controlled to be zero, and a fault signal is output. At the same time, it continues to be determined whether the fault disappears. If the fault disappears, the welding machine is controlled to enter a standby state, so that the welding machine outputs a standby voltage. If the fault does not disappear, it is always in a fault state. If it is determined that the current welding machine does not have a fault, it directly enters the standby state.

[0055] After entering the standby state, the welding voltage is detected in real time in the standby state to detect whether the electrode is in contact with the workpiece. If the welding voltage is less than the contact voltage, it means that the electrode has been in contact with the workpiece, and the arc-starting preparation state is entered at this time. If the welding voltage is greater than or equal to the contact voltage, it means that the electrode is not in contact with the workpiece, and the welder is always in the standby state. In the arc-starting preparation state, it is necessary to determine whether the arc-starting current is detected within the preset time. If it is detected, the welder is controlled to enter the arc-starting state. If not detected, the welder is controlled to enter the standby state. In the arc-starting state, arc-starting current control and arc-starting time control will be performed. At the same time, it is necessary to detect whether there is welding current in real time to determine whether the electrode leaves the weldment. If the welding current is not detected, it means that the arc-starting electrode is separated from the weldment, and the welder is controlled to enter the standby state. If in the arc-starting state, the detection transition time is equal to the arc-starting time, it means that the arc-starting waiting is over, and it is necessary to enter the next welding state.

[0056] In the welding state, the welding machine will perform welding current control, thrust control, electrode adhesion judgment and welding current presence or absence judgment. If the welding current is not detected, it means that the welding rod is separated from the workpiece, and the welding machine is controlled to enter the standby state. If it is detected that the welding voltage is less than the adhesion voltage within a preset time period, it is judged that the welding rod has produced adhesion, and at this time, the welding machine is controlled to enter the anti-adhesion state. In the anti-adhesion state, the welding current is controlled to be a small current adhesion current, and the presence or absence of the welding current is detected in real time. If the welding current is not detected, it means that the welding rod is separated from the workpiece, and the welding machine is controlled to enter the standby state. Through the manual arc welding control method of the embodiment of the present application, manual arc welding can be provided with multiple functions to adapt to different welding requirements. And through the manual arc welding control method of the embodiment of the present application, the arc starting performance, thrust performance, anti-adhesion performance and other performances are relatively excellent.

[0057] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0058] Based on the same inventive concept, the embodiment of the present application also provides a manual arc welding control device for implementing the manual arc welding control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more manual arc welding control device embodiments provided below can refer to the limitations of the manual arc welding control method above, and will not be repeated here.

[0059] In one embodiment, Figure 7 As shown, the present application also proposes a manual arc welding control device for executing the manual arc welding control method in the above-mentioned embodiment, the manual arc welding control device includes a welding main circuit, a drive circuit, a welding voltage detection circuit, a welding current detection circuit and a processor, wherein: the welding main circuit is used to convert the input alternating current into a welding output; the drive circuit is connected to the welding main circuit, and the drive circuit is used to drive and control the welding main circuit; the welding voltage detection circuit is used to detect the welding voltage of the welding output; the welding current detection circuit is used to detect the welding current of the welding output; the processor is respectively connected to the drive circuit, the welding voltage detection circuit and the welding current detection circuit, and the processor is used to generate a drive signal according to the welding voltage and the welding current, and the drive signal is used to control the drive circuit to drive and control the welding main circuit.

[0060] Specifically, the input power supply of the welding main circuit can be 220V or 380V AC, and the welding main circuit includes modules such as a primary rectifier and filter circuit, an inverter circuit, a transformer circuit, a secondary rectifier circuit, and a filter circuit, which are used to convert the AC power into a welding output after stepping down and rectifying it. The welding output is to output a suitable welding voltage and welding current, and apply it to the welding handle and the welding rod. The welding voltage detection circuit is used to isolate and condition the output welding voltage, and generate a voltage signal that can be collected by the processor for ADC detection by the processor. The welding current detection circuit is used to isolate and condition the output welding voltage, and generate a voltage signal that can be collected by the processor for ADC detection by the processor. The processor can be an ARM core chip, which detects the output welding voltage and welding current in real time through the built-in welding parameters, and uses the corresponding algorithm according to the specific process requirements to generate a pulse drive signal to control the welding main circuit to output a suitable welding voltage and welding current for manual arc welding. It can be understood that the processor can perform functions such as voltage reduction control, arc ignition control, welding process control, thrust control and anti-adhesion control in the above embodiments, and high-quality manual arc welding can be completed through the control coordination of different modules.

[0061] The above-mentioned manual arc welding control device will detect the welding voltage and welding current after obtaining the power-on signal, and will enter the standby state only when the welding voltage and welding current are both zero. Only when the welding voltage in the standby state is less than the contact voltage, will it enter the subsequent arc-starting preparation state and arc-starting state to start the arc-starting operation. By detecting the size of the welding voltage and welding current after starting the machine, it is determined whether the current manual arc welding has a fault. If there is no fault, it will enter the standby state, and perform the subsequent arc-starting preparation state and arc-starting state to complete the arc-starting operation. By pre-detecting the fault state, the manual arc welding will start the arc-starting operation only when there is no fault, thereby improving the arc-starting performance and effect.

[0062] In one embodiment, Figure 7 As shown, the manual arc welding control device also includes: a human-computer interaction module, the human-computer interaction module is connected to the processor, and the human-computer interaction module is used to set welding parameters and display parameters in real time. The human-computer interaction module includes a touch screen and a display screen, etc. The user can set the welding parameters in real time through the touch screen, and the display of the welding parameters on the display screen is convenient for the user to control and select the welding parameters when manual arc welding. In some other embodiments, the human-computer interaction module may not be set separately, and the corresponding welding parameters can be set at the factory for the user's subsequent welding use.

[0063] Each module in the above-mentioned manual arc welding control device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0064] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A manual arc welding control method, characterized in that: The method comprises: Acquire a power-on signal, and detect welding voltage and welding current according to the power-on signal; If the welding voltage and the welding current are both zero, the device enters a standby state; wherein, in the standby state, the welding voltage is controlled to be a standby voltage; if the welding voltage or the welding current is not zero, the device enters a fault state; wherein, in the fault state, the welding voltage and the welding current are controlled to be zero, and a fault signal is output; acquiring the welding voltage in the standby state; If the welding voltage is less than the contact voltage, the arc striking preparation state is entered; wherein, in the arc striking preparation state, the welding current is controlled to be the arc striking current; If the arc striking current is detected within the preset time, the arc striking state is entered; wherein, in the arc striking state, a preset arc striking time is obtained; If the transition time is equal to the arc striking time, the welding state is entered; wherein, in the welding state, the welding current is controlled to perform constant current welding.

2. The manual arc welding control method according to claim 1, characterized in that: The step of controlling the welding current to perform constant current welding in the welding state comprises: obtaining the welding voltage; If the welding voltage is greater than a preset voltage, the welding current is controlled to be a constant value.

3. The manual arc welding control method according to claim 2, characterized in that: 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 preset voltage, the welding current is adjusted according to the maximum thrust current to perform constant current welding.

4. The manual arc welding control method according to claim 3, characterized in that: 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, the anti-adhesion state is entered; wherein, in the anti-adhesion state, the welding current is controlled to be an anti-adhesion current.

5. The manual arc welding control method according to claim 4, characterized in that: The method further comprises: detecting the welding current in the anti-adhesion state; If the welding current is zero, the standby state is entered.

6. The manual arc welding control method according to claim 1, characterized in that: The method further comprises: Acquiring the welding current in the arc striking state; If the welding current is zero, the standby state is entered.

7. The manual arc welding control method according to claim 1, characterized in that: The method further comprises: Acquiring the welding current in the welding state; If the welding current is zero, the standby state is entered.

8. A manual arc welding control device, characterized in that: Used to execute the manual arc welding control method according to any one of claims 1 to 7, the device comprises: A welding main circuit, the welding main circuit is used to convert input alternating current into welding output; A driving circuit, the driving circuit is connected to the welding main circuit, and the driving circuit is used to drive and control the welding main circuit; A welding voltage detection circuit, the welding voltage detection circuit is used to detect the welding voltage of the welding output; A welding current detection circuit, the welding current detection circuit is used to detect the welding current of the welding output; A processor is connected to the drive circuit, the welding voltage detection circuit and the welding current detection circuit respectively, and the processor is used to generate a drive signal according to the welding voltage and the welding current, and the drive signal is used to control the drive circuit to drive and control the welding main circuit.

9. The manual arc welding control device according to claim 8, characterized in that: The device further comprises: a human-computer interaction module, the human-computer interaction module is connected to the processor, and the human-computer interaction module is used for setting welding parameters and displaying the parameters in real time.

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