CN110369831B - Digital welding machine control system and method - Google Patents
Digital welding machine control system and method Download PDFInfo
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- CN110369831B CN110369831B CN201910670935.3A CN201910670935A CN110369831B CN 110369831 B CN110369831 B CN 110369831B CN 201910670935 A CN201910670935 A CN 201910670935A CN 110369831 B CN110369831 B CN 110369831B
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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Abstract
According to the digital welding machine control system provided by the invention, the control box provides different input voltages for the arc welding machine, and respectively records the output voltage and the output current of the arc welding machine; correlating the input voltage of the arc welding machine with the corresponding output voltage, and establishing a voltage control relation; the device is also used for correlating the input voltage of the arc welding machine with the corresponding output current and establishing a current control relation; receiving an output voltage preset value or an output current preset value of the arc welding machine input by a user, reading an input voltage corresponding to the output voltage preset value or the output current preset value from the voltage control relation or the current control relation, and outputting corresponding electric power to the arc welding machine according to the input voltage. The digital welding machine control system overcomes the defect that the difference between the preset value and the actual value of the output voltage of the arc welding machine is large in the existing arc welding machine control method.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a digital welding machine control system and method.
Background
The electrical characteristic of the existing full-bridge type controllable rectifying arc welding machine adopts a slow-falling characteristic, so that the output signal of the arc welding machine is nonlinear. The existing control method of the arc welding machine is to adjust the analog voltage through a potentiometer and control the output signal of the arc welding machine, and the output voltage of the arc welding machine cannot be accurately controlled by a user due to the nonlinearity of the output signal of the arc welding machine in the using process, so that the difference between the preset value and the actual value of the output voltage of the arc welding machine is large.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a digital welding machine control system and method, which solve the defect that the difference between the preset value and the actual value of the output voltage of an arc welding machine is large in the existing arc welding machine control method.
A digital welding machine control system comprises a control box;
the control box is electrically connected with an external arc welding machine and is used for providing different input voltages for the arc welding machine and respectively recording the output voltage and the output current of the arc welding machine;
the control box is also used for correlating the input voltage of the arc welding machine with the corresponding output voltage and establishing a voltage control relation; the device is also used for correlating the input voltage of the arc welding machine with the corresponding output current and establishing a current control relation;
the control box is also used for receiving an output voltage preset value or an output current preset value of the arc welding machine input by a user, reading an input voltage corresponding to the output voltage preset value or the output current preset value from the voltage control relation or the current control relation, and outputting corresponding electric power to the arc welding machine according to the input voltage.
Preferably, the voltage control relationship includes recording a list of input voltages and corresponding output voltages, or a graph with an input voltage on the abscissa and an output voltage on the ordinate;
the current control relationship includes recording a list of input voltages and corresponding output currents, or a graph with input voltage on the abscissa and output current on the ordinate.
Preferably, the control box is further configured to collect a real-time output voltage and a real-time output current of the arc welding machine after outputting corresponding electric power to the arc welding machine according to the input voltage, and when a difference between the real-time output voltage or the real-time output current of the arc welding machine and the preset voltage value or the preset output current value is greater than a preset correction difference, the control box corrects the input voltage of the arc welding machine.
Preferably, the control box is specifically configured to:
calculating the slope A of the input voltage in the voltage control relationship or the current control relationship by:
a is input voltage/output voltage, or is input voltage/output current;
calculating the difference B between the real-time output voltage or the real-time output current and the preset voltage value or the preset output current value according to the following formula:
b ═ real-time output voltage-output voltage |, or B ═ real-time output current-output current; non-viable cells
The correction voltage C of the control box is calculated by:
if A is positive, C is input voltage + A multiplied by B;
if A is negative, C is input voltage-A multiplied by B;
and the control box outputs corresponding electric power to the arc welding machine according to the correction voltage C.
Preferably, the control box is further configured to associate the current real-time output voltage or real-time output current of the arc welding machine with the input voltage and reestablish the voltage control relationship or current control relationship when the number of times that the difference B is continuously detected to be greater than the correction difference is greater than a preset maximum correction number.
In a second aspect, a digital welder control method includes the following steps:
providing different input voltages for the arc welding machine, and respectively recording the output voltage and the output current of the arc welding machine;
correlating the input voltage of the arc welding machine with the corresponding output voltage, and establishing a voltage control relation;
correlating the input voltage of the arc welding machine with the corresponding output current, and establishing a current control relation;
receiving an output voltage preset value or an output current preset value of the arc welding machine input by a user, reading an input voltage corresponding to the output voltage preset value or the output current preset value from the voltage control relation or the current control relation, and outputting corresponding electric power to the arc welding machine according to the input voltage.
Preferably, the voltage control relationship includes recording a list of input voltages and corresponding output voltages, or a graph with an input voltage on the abscissa and an output voltage on the ordinate;
the current control relationship includes recording a list of input voltages and corresponding output currents, or a graph with input voltage on the abscissa and output current on the ordinate.
Preferably, after the outputting the corresponding power to the arc welder according to the input voltage, the method further comprises:
collecting real-time output voltage and real-time output current of an arc welding machine;
and when the difference value between the real-time output voltage or the real-time output current of the arc welding machine and the preset voltage value or the preset output current value is larger than the preset correction difference value, correcting the input voltage of the arc welding machine.
Preferably, the correcting the input voltage of the arc welding machine specifically includes:
calculating the slope A of the input voltage in the voltage control relationship or the current control relationship by:
a is input voltage/output voltage, or is input voltage/output current;
calculating the difference B between the real-time output voltage or the real-time output current and the preset voltage value or the preset output current value according to the following formula:
b ═ real-time output voltage-output voltage |, or B ═ real-time output current-output current; non-viable cells
The correction voltage C is calculated by:
if A is positive, C is input voltage + A multiplied by B;
if A is negative, C is input voltage-A multiplied by B;
and outputting corresponding electric power to the arc welding machine according to the correction voltage C.
Preferably, after the outputting the corresponding power to the arc welder according to the input voltage, the method further comprises:
and when the times that the difference value B is larger than the correction difference value is continuously detected to be larger than the maximum value of the preset correction times, correlating the real-time output voltage or the real-time output current of the current arc welding machine with the input voltage, and reestablishing the voltage control relationship or the current control relationship.
According to the technical scheme, the digital welding machine control system and the digital welding machine control method, provided by the invention, are used for collecting the output current or the output voltage of the arc welding machine under different voltages and establishing a voltage control relation and a current control relation, so that the input voltage of the arc welding machine is determined according to the preset value of the output voltage or the preset value of the output current set by a user during welding and is supplied to the arc welding machine, and the defect that the preset value and the actual value of the output voltage of the arc welding machine are greatly different in the existing arc welding machine control method is overcome.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a block diagram of a digital welder control system according to an embodiment of the present invention.
Fig. 2 is a flowchart of a digital welder control method according to a second embodiment of the present invention.
Fig. 3 is a flowchart of a calibration method according to a second embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The first embodiment is as follows:
a digital welder control system, see figure 1, includes a control box;
the control box is electrically connected with an external arc welding machine and is used for providing different input voltages for the arc welding machine and respectively recording the output voltage and the output current of the arc welding machine;
the control box is also used for correlating the input voltage of the arc welding machine with the corresponding output voltage and establishing a voltage control relation; the device is also used for correlating the input voltage of the arc welding machine with the corresponding output current and establishing a current control relation;
the control box is also used for receiving an output voltage preset value or an output current preset value of the arc welding machine input by a user, reading an input voltage corresponding to the output voltage preset value or the output current preset value from the voltage control relation or the current control relation, and outputting corresponding electric power to the arc welding machine according to the input voltage.
Specifically, the voltage control relationship reflects the real relationship between the input voltage and the output voltage of the arc welding machine, and the current control relationship also reflects the real relationship between the input voltage and the output current of the arc welding machine, so that when a user inputs the output voltage or the output current required by the arc welding machine during welding, the corresponding input voltage can be found out from the voltage control relationship or the current control relationship, the input voltage is provided for the arc welding machine, and the arc welding machine can output a signal which is the same as the required output voltage or the required output current.
The digital welding machine control system collects output current or output voltage of the arc welding machine under different voltages and establishes a voltage control relation and a current control relation, so that the input voltage of the arc welding machine is determined according to an output voltage preset value or an output current preset value set by a user and is supplied to the arc welding machine during welding, and the defect that the difference between the preset value and the actual value of the output voltage of the arc welding machine is large in the existing arc welding machine control method is overcome.
Preferably, the voltage control relationship includes recording a list of input voltages and corresponding output voltages, or a graph with an input voltage on the abscissa and an output voltage on the ordinate;
the current control relationship includes recording a list of input voltages and corresponding output currents, or a graph with input voltage on the abscissa and output current on the ordinate.
In particular, the voltage control relationship and the current control relationship may be a list or graph that records input signals and output signals of the arc welder.
Preferably, the control box is further configured to collect a real-time output voltage and a real-time output current of the arc welding machine after outputting corresponding electric power to the arc welding machine according to the input voltage, and when a difference between the real-time output voltage or the real-time output current of the arc welding machine and the preset voltage value or the preset output current value is greater than a preset correction difference, the control box corrects the input voltage of the arc welding machine.
Specifically, the system monitors the output signal of the arc welding machine in real time in the actual use process, and continuously collects the output voltage or the output current of the arc welding machine to correct the input signal in the welding process, thereby realizing closed-loop control and achieving the function of automatically corresponding to preset output. When the output signal of the arc welding machine is greatly deviated from the voltage preset value or the current preset value, the input voltage of the arc welding machine is timely adjusted according to the voltage control relation and the current control relation, so that the output signal of the arc welding machine is kept consistent with the voltage preset value or the current preset value as far as possible.
Preferably, the control box is specifically configured to:
calculating the slope A of the input voltage in the voltage control relationship or the current control relationship by:
a is input voltage/output voltage, or is input voltage/output current;
calculating the difference B between the real-time output voltage or the real-time output current and the preset voltage value or the preset output current value according to the following formula:
b ═ real-time output voltage-output voltage |, or B ═ real-time output current-output current; non-viable cells
The correction voltage C of the control box is calculated by:
if A is positive, C is input voltage + A multiplied by B;
if A is negative, C is input voltage-A multiplied by B;
and the control box outputs corresponding electric power to the arc welding machine according to the correction voltage C.
Specifically, the system calculates the deviation between the output signal and the preset voltage value or the preset current value through the slope of the input voltage in the voltage control relation or the current control relation, and adjusts the input voltage of the arc welding machine according to the deviation, the method is simple, and a small-step adjustment mode is adopted, so that the deviation is automatically close to 0.
Preferably, the control box is further configured to associate the current real-time output voltage or real-time output current of the arc welding machine with the input voltage and reestablish the voltage control relationship or current control relationship when the number of times that the difference B is continuously detected to be greater than the correction difference is greater than a preset maximum correction number.
Specifically, when the number of consecutive times that the output signal of the arc welding machine deviates from the preset voltage value or the preset current value is excessive, it is indicated that the previous voltage control relationship or current control relationship has failed, and the voltage control relationship or current control relationship needs to be updated again, at this time, the output signal and the input signal of the arc welding machine are collected again, and the voltage control relationship or the current control relationship is updated according to the corresponding relationship between the new output signal and the new input signal, so that the user can accurately control the output signal of the arc welding machine in real time.
Example two:
a digital welder control method, see fig. 2, comprising the steps of:
providing different input voltages for the arc welding machine, and respectively recording the output voltage and the output current of the arc welding machine;
correlating the input voltage of the arc welding machine with the corresponding output voltage, and establishing a voltage control relation;
correlating the input voltage of the arc welding machine with the corresponding output current, and establishing a current control relation;
receiving an output voltage preset value or an output current preset value of the arc welding machine input by a user, reading an input voltage corresponding to the output voltage preset value or the output current preset value from the voltage control relation or the current control relation, and outputting corresponding electric power to the arc welding machine according to the input voltage.
Preferably, the voltage control relationship includes recording a list of input voltages and corresponding output voltages, or a graph with an input voltage on the abscissa and an output voltage on the ordinate;
the current control relationship includes recording a list of input voltages and corresponding output currents, or a graph with input voltage on the abscissa and output current on the ordinate.
Preferably, after the outputting the corresponding power to the arc welder according to the input voltage, the method further comprises:
collecting real-time output voltage and real-time output current of an arc welding machine;
and when the difference value between the real-time output voltage or the real-time output current of the arc welding machine and the preset voltage value or the preset output current value is larger than the preset correction difference value, correcting the input voltage of the arc welding machine.
Referring to fig. 3, the correcting the input voltage of the arc welding machine specifically includes:
calculating the slope A of the input voltage in the voltage control relationship or the current control relationship by:
a is input voltage/output voltage, or is input voltage/output current;
calculating the difference B between the real-time output voltage or the real-time output current and the preset voltage value or the preset output current value according to the following formula:
b ═ real-time output voltage-output voltage |, or B ═ real-time output current-output current; non-viable cells
The correction voltage C is calculated by:
if A is positive, C is input voltage + A multiplied by B;
if A is negative, C is input voltage-A multiplied by B;
and outputting corresponding electric power to the arc welding machine according to the correction voltage C.
Preferably, after the outputting the corresponding power to the arc welder according to the input voltage, the method further comprises:
and when the times that the difference value B is larger than the correction difference value is continuously detected to be larger than the maximum value of the preset correction times, correlating the real-time output voltage or the real-time output current of the current arc welding machine with the input voltage, and reestablishing the voltage control relationship or the current control relationship.
The method collects the output current or the output voltage of the arc welding machine under different voltages, and establishes a voltage control relation and a current control relation, so that the input voltage of the arc welding machine is determined according to the preset value of the output voltage or the preset value of the output current set by a user during welding and is supplied to the arc welding machine, and the defect that the difference between the preset value and the actual value of the output voltage of the arc welding machine is large in the existing control method of the arc welding machine is overcome.
For the sake of brief description, the method provided by the embodiment of the present invention may refer to the corresponding contents in the foregoing system embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (2)
1. A digital welding machine control system is characterized by comprising a control box;
the control box is electrically connected with an external arc welding machine and is used for providing different input voltages for the arc welding machine and respectively recording the output voltage and the output current of the arc welding machine;
the control box is also used for correlating the input voltage of the arc welding machine with the corresponding output voltage and establishing a voltage control relation; the device is also used for correlating the input voltage of the arc welding machine with the corresponding output current and establishing a current control relation;
the control box is also used for receiving an output voltage preset value or an output current preset value of the arc welding machine input by a user, reading an input voltage corresponding to the output voltage preset value or the output current preset value from the voltage control relation or the current control relation, and outputting corresponding electric power to the arc welding machine according to the input voltage;
the voltage control relationship comprises a list for recording input voltage and corresponding output voltage, or a curve graph with the abscissa as input voltage and the ordinate as output voltage;
the current control relationship comprises a list for recording input voltage and corresponding output current, or a curve graph with the abscissa as input voltage and the ordinate as output current;
the control box is also used for collecting the real-time output voltage and the real-time output current of the arc welding machine after outputting corresponding electric power to the arc welding machine according to the input voltage, and when the difference value between the real-time output voltage or the real-time output current of the arc welding machine and the preset value of the output voltage or the preset value of the output current is larger than the preset correction difference value, the control box corrects the input voltage of the arc welding machine;
the control box is specifically used for:
calculating the slope A of the input voltage in the voltage control relationship or the current control relationship by:
a is real-time input voltage/real-time output voltage, or is real-time input voltage/real-time output current;
calculating the difference B between the real-time output voltage or the real-time output current and the output voltage preset value or the output current preset value according to the following formula:
b ═ real-time output voltage-output voltage preset value |, or B ═ real-time output current-output current preset value |;
the correction voltage C of the control box is calculated by:
if A is positive, C is real-time input voltage + A multiplied by B;
if A is negative, C is real-time input voltage-A multiplied by B;
the control box outputs corresponding electric power to the arc welding machine according to the correction voltage C;
and the control box is also used for associating the current real-time output voltage or real-time output current of the arc welding machine with the input voltage and reestablishing the voltage control relationship or the current control relationship when the times that the difference value B is larger than the correction difference value is continuously detected to be larger than the preset maximum correction times.
2. A digital welding machine control method is characterized by comprising the following steps:
providing different input voltages for the arc welding machine, and respectively recording the output voltage and the output current of the arc welding machine;
correlating the input voltage of the arc welding machine with the corresponding output voltage, and establishing a voltage control relation;
correlating the input voltage of the arc welding machine with the corresponding output current, and establishing a current control relation;
receiving an output voltage preset value or an output current preset value of an arc welding machine input by a user, reading an input voltage corresponding to the output voltage preset value or the output current preset value from the voltage control relation or the current control relation, and outputting corresponding electric power to the arc welding machine according to the input voltage;
the voltage control relationship comprises a list for recording input voltage and corresponding output voltage, or a curve graph with the abscissa as input voltage and the ordinate as output voltage;
the current control relationship comprises a list for recording input voltage and corresponding output current, or a curve graph with the abscissa as input voltage and the ordinate as output current;
after outputting the corresponding power to the arc welding machine according to the input voltage, the method further comprises the following steps:
collecting real-time output voltage and real-time output current of an arc welding machine;
when the difference value between the real-time output voltage or the real-time output current of the arc welding machine and the output voltage preset value or the output current preset value is larger than the preset correction difference value, correcting the input voltage of the arc welding machine;
the correcting the input voltage of the arc welding machine specifically comprises the following steps:
calculating the slope A of the input voltage in the voltage control relationship or the current control relationship by:
a is real-time input voltage/real-time output voltage, or is real-time input voltage/real-time output current;
calculating the difference B between the real-time output voltage or the real-time output current and the output voltage preset value or the output current preset value according to the following formula:
b ═ real-time output voltage-output voltage preset value |, or B ═ real-time output current-output voltage preset value |;
the correction voltage C is calculated by:
if A is positive, C is real-time input voltage + A multiplied by B;
if A is negative, C is real-time input voltage-A multiplied by B;
outputting corresponding electric power to the arc welding machine according to the correction voltage C;
after outputting the corresponding power to the arc welding machine according to the input voltage, the method further comprises the following steps:
and when the times that the difference value B is larger than the correction difference value is continuously detected to be larger than the maximum value of the preset correction times, correlating the real-time output voltage or the real-time output current of the current arc welding machine with the input voltage, and reestablishing the voltage control relationship or the current control relationship.
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