CN112894079A - Digital pulse type direct current manual arc welding method and electric arc welding machine applying same - Google Patents
Digital pulse type direct current manual arc welding method and electric arc welding machine applying same Download PDFInfo
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- CN112894079A CN112894079A CN202110059757.8A CN202110059757A CN112894079A CN 112894079 A CN112894079 A CN 112894079A CN 202110059757 A CN202110059757 A CN 202110059757A CN 112894079 A CN112894079 A CN 112894079A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B23K9/00—Arc welding or cutting
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
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Abstract
The invention provides a digital pulse type direct current manual electric arc welding method and an electric arc welding machine using the same, wherein the original constant current electric arc welding of the welding machine is changed into pulse current electric arc welding, so that the splashing is smaller than that of the traditional inversion type direct current electric arc welding machine, the slag inclusion and air holes of a welding line are effectively reduced, welding materials are saved, and the yield is improved. The user inputs variable quantities of peak current and pulse frequency, which can be better adapted to the actual welding conditions. The user only needs to set the peak current and automatically matches the basic value current with the corresponding size in the matching database, so that the situation that the pulse peak current and the pulse basic value current of the welding current are not matched due to improper selection of the user with insufficient welding experience, and the short circuit, poor stability of the welding process and low welding quality are caused in the welding process can be effectively avoided. The welding seam of the invention is more beautiful, the scale pattern is automatically generated, and the welding quality is better.
Description
Technical Field
The invention relates to the technical field of electric arc welding, in particular to a digital pulse type direct current manual electric arc welding method of an inverter type direct current electric arc welding machine and the electric arc welding machine applying the same.
Background
The traditional inverter type direct current arc welding machines are all of constant current characteristics, but the welding process with high standard and high quality welding seam can be realized by advanced technicians or welders with experience of years or even decades. The traditional inverter type direct current arc welding machine has extremely large splashing in the welding process, and unnecessary waste is caused to a welding rod, so that the characteristics of the welding machine need to be substantially changed, and the pulse function is added on the original welding machine control mode. Furthermore, the user experience with electric arc welders is limited and the correct pulse welding current cannot be selected precisely, so that the welding result is greatly affected.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a digital pulse type direct current manual arc welding method and an arc welding machine applying the same.
In order to achieve the purpose, the invention adopts the following technical scheme:
a digital pulse type direct current manual arc welding method is used for direct current manual arc welding and comprises the following steps:
and 4, outputting corresponding welding current by the pulse current according to the input peak current, the base current matched with the peak current, the input pulse frequency and the preset duty ratio, and completing welding.
Preferably, the peak current is selected in the range of 60A-220A.
Preferably, the preset base current is in the range of 30A-180A.
Preferably, the duty cycle is 55%.
Preferably, the control panel is provided with 10 pulse frequency gears, the frequency values are from gear 1 to gear 10 from small to large, and the user selects different pulse frequency gears through the knob.
Preferably, the pulse frequency is 500/(50+ gear n × 50), and n is 1 ≦ n ≦ 10.
Preferably, the electrode diameter is at least 2.5 millimeters.
Preferably, the electrode diameter increases with the user selected peak current.
An electric arc welder comprises an input module, a control module and an output module; the input module comprises a peak current input module and a pulse frequency selection module, the input module is used for inputting peak current and pulse frequency, the control module is used for automatically matching base current through the input peak current, and the output module is used for outputting corresponding pulse welding current through the peak current, the base current, the pulse frequency and a preset duty ratio.
Compared with the prior art, the digital pulse type direct current manual electric arc welding method has the advantages that the pulse function is added in the original welding machine control mode, the original constant current electric welding of the welding machine is changed into the pulse current electric welding, so that the splashing is smaller than that of the traditional inverter type direct current electric arc welding machine, the welding seam slag inclusion and air holes are effectively reduced due to the smaller splashing, the welding materials are saved, the dependence on professional welders is greatly reduced, and the yield is improved.
The peak current and pulse frequency values required for each weld are different depending on the actual situation. The invention discloses a pulse type direct current manual arc welding method, wherein variable quantities input by a user are peak current and pulse frequency. The peak current is variable, and the situation that the welding current is too large and the welding plate is welded through or the welding current is too small and the welding is not firm can be well avoided. The pulse frequency is variable, and the density of the welding lines can be controlled according to the situation; the higher the pulse frequency, the denser the weld pattern.
The user only needs to set the peak current, and the automatic matching of the basic value current with the corresponding size in the matching database ensures that the pulse current is proper, so that the situation that the pulse peak current and the pulse basic value current of the welding current are not matched due to the fact that the user unfamiliar with welding selects the welding current without conception can be effectively avoided, and the situations of short circuit, poor stability of the welding process and low welding quality in the welding process are caused. The welding seam of the invention is more beautiful, the scale pattern is automatically generated, and the welding quality is better.
Drawings
FIG. 1 is a flow chart of a digital pulsed DC manual arc welding method;
FIG. 2 is a schematic block diagram of an electric arc welder using a digital pulsed DC manual arc welding method.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
The invention provides a digital pulse type direct current manual electric arc welding method, which is used for direct current manual electric arc welding and comprises the following steps:
step S1, determining a variable value; the variables include peak current and pulse frequency, which the user has determined from the actual welding requirements.
Step S2, inputting variable numerical values; the user inputs the peak current and the pulse frequency through the control panel.
Step S3, matching corresponding preset quantity according to the input variable quantity; the preset quantity comprises a base value current, a duty ratio and a matching database; the matching database comprises at least 2 groups of peak current values and base current values which are matched with each other, the matching database automatically matches corresponding base current values according to the peak current values input by a user and outputs the base current values, and the duty ratio is the duty ratio with a fixed value. The selectable range of peak currents should be within the selection range of the matching database to ensure that each peak current entered by the user can be matched to a corresponding base current in the matching database.
And step S4, outputting corresponding welding current according to the input peak current, the base current matched with the peak current, the input pulse frequency and the preset duty ratio by the pulse current, and completing welding.
The constant current welding of the traditional inverter type direct current arc welding machine is changed into the pulse current welding, the splashing is smaller than that of the traditional inverter type direct current arc welding machine, and because the splashing is smaller, welding seam slag inclusion and air holes are effectively reduced, welding materials are saved, the dependence on professional welders is greatly reduced, and the yield is improved.
Pulsed current welding needs to give the following magnitudes: peak current, base current, pulse frequency, and duty cycle, which together determine the output of the pulse current. In the invention, the peak current and the pulse frequency are variables which can be selected and input by a user in a certain range, a plurality of groups of basic value currents are pre-stored in a matching database, and each pre-stored basic value current is correspondingly matched with one peak current value. Therefore, when a user inputs required peak current to the control panel according to actual conditions, the matching database automatically matches corresponding base value current, and the matched base value current is the optimal base value current value which is proved by tests in advance, so that the conditions of short circuit, poor stability of the welding process and low welding quality in the welding process can be avoided, the welding seam is more attractive in shape, the fish scale pattern is automatically generated, and the welding quality is better. The peak current is variable, the matched base value current is also changed, and the conditions that the welding current is too large, the welding plate is welded through, or the welding current is too small and the welding is not firm can be well avoided. The pulse frequency is variable, and the density of the welding lines can be controlled according to the situation; the higher the pulse frequency, the denser the weld pattern. The duty ratio is a pre-fixed value, so that the situation that the self-set duty ratio is not suitable due to insufficient understanding of the pulse current for welding by a user is prevented. Preferably, the preset duty ratio is 55%, which is the most universal duty ratio obtained after experiments, and a better welding effect can be obtained in all adjustable value ranges of the peak current and the pulse frequency.
In a preferred embodiment, the peak current is selected in the range of 60A-270A. The range of base currents in the matching database corresponding to the peak currents in the above ranges is 30A-230A, and the peak currents and the base currents in this range can satisfy the welding requirements in most cases.
In one embodiment, the electrode diameter is at least 2.5 millimeters. Preferably, the electrode diameter increases with the user selected peak current.
Matching the peak current in the database to the expected corresponding background current is the best value taken through a number of experiments. Setting the pulse frequency to 1Hz, the duty ratio to 55%, selecting several groups of peak current, corresponding base current and electrode diameter as shown in the following table:
the peak current and the base current in the table are 21 corresponding values in the matching database, for example, when a user inputs the peak current 180A through the control panel, the matching database automatically matches the base current 140A, the user does not need to input the base current, and convenience of pulse current welding operation and welding quality are guaranteed.
In one embodiment, the control board is provided with 10 pulse frequency gears, the frequency values are from gear 1 to gear 10 from small to large, and a user selects different pulse frequency gears through a knob. The pulse frequency of each gear is 500/(50+ gear n × 50), and n is more than or equal to 1 and less than or equal to 10. The pulse frequency is made into 10 selectable gears, so that the user can conveniently select the gears according to actual conditions, the pulse frequency exceeding the welding range can be prevented from being input by the user due to insufficient experience of the electric welding machine, the welding quality is guaranteed, the dependence on professional welders is reduced, and the yield is improved.
Referring to fig. 2, an electric arc welder includes an input module 1, a control module 2, and an output module 3; the input module 1 includes a peak current input module 11 and a pulse frequency selection module 12, the input module 1 is configured to input a peak current 31 and a pulse frequency 33, the control module 2 is configured to automatically match a base current 32 with the input peak current 31, and the output module 3 is configured to output a corresponding pulse welding current with the peak current 31, the base current 32, the pulse frequency 33 and a preset duty ratio 34. The electric arc welding machine adopts the manual electric arc welding method, and the input module 1 can input the peak current 31 to the control board through a key or select the peak current 31 through the rotation of a knob; the pulse frequency 33 can be input by selecting preset 10 pulse frequency steps, and the pulse frequency steps can be selected in a key mode or a knob mode. When the electric arc welding machine is operated, a user only needs to input the peak current 31 and select the gear of the pulse frequency 33 according to actual conditions, the base current 32 is automatically matched according to the peak current 31, the duty ratio 34 is preset, the situation that the user without enough welding experience can finish welding with good quality is guaranteed to the greatest extent, the weld joint is more attractive in forming, and the fish scale pattern is automatically generated.
Therefore, the original constant-current electric welding of the welding machine is changed into pulse current electric welding, so that the spattering is smaller than that of the traditional inverter type direct current electric arc welding machine, the welding seam slag inclusion and air holes are effectively reduced, welding materials are saved, and the yield is improved. The variable amounts entered by the user are peak current and pulse frequency. The peak current is variable, and the situation that the welding current is too large and the welding plate is welded through or the welding current is too small and the welding is not firm can be well avoided. The pulse frequency is variable, and the density of the welding lines can be controlled according to the situation; the higher the pulse frequency, the denser the weld pattern. The user only needs to set the peak current and automatically matches the basic value current with the corresponding size in the matching database, so that the situation that the pulse peak current and the pulse basic value current of the welding current are not matched due to the fact that the user with insufficient welding experience has no concept for selecting the size of the welding current, and the short circuit, the poor stability of the welding process and the low welding quality in the welding process are caused can be effectively avoided. The welding seam of the invention is more beautiful, the scale pattern is automatically generated, and the welding quality is better.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (9)
1. A digital pulse type direct current manual arc welding method is used for direct current manual arc welding, and is characterized by comprising the following steps:
step 1, determining a variable value; the variable quantity comprises a peak current and a pulse frequency, and the user determines the magnitudes of the peak current and the pulse frequency according to the actual welding requirement;
step 2, inputting variable numerical values; inputting peak current and pulse frequency by a user through a control panel;
step 3, matching corresponding preset quantity according to the input variable quantity; the preset quantity comprises a base value current, a duty ratio and a matching database; the matching database comprises at least 2 groups of peak current values and base current values which are matched with each other, the matching database automatically matches corresponding base current values according to the peak current values input by a user and outputs the base current values, and the duty ratio is a duty ratio with a fixed value;
and 4, outputting corresponding welding current by the pulse current according to the input peak current, the base current matched with the peak current, the input pulse frequency and the preset duty ratio, and completing welding.
2. The digital pulsed direct current manual arc welding method of claim 1, wherein: the peak current is selected to be in the range of 60A-220A.
3. The digital pulsed dc manual arc welding method of claim 2, wherein: the preset base current is in the range of 30A-180A.
4. The digital pulsed direct current manual arc welding method of claim 1, wherein: the duty cycle is 55%.
5. The digital pulsed direct current manual arc welding method of claim 1, wherein: the control panel is provided with 10 pulse frequency gears, the frequency values are from gear 1 to gear 10 from small to large, and a user selects different pulse frequency gears through a knob.
6. The digital pulsed direct current manual arc welding method of claim 5, wherein: the pulse frequency = 500/(50+ gear n × 50), and n is more than or equal to 1 and less than or equal to 10.
7. The digital pulsed direct current manual arc welding method of claim 1, wherein: the diameter of the electrode is at least 2.5 mm.
8. The digital pulsed dc manual arc welding method of claim 7, wherein: the electrode diameter increases with the user selected peak current.
9. An electric arc welder, characterized in that: the device comprises an input module, a control module and an output module; the input module comprises a peak current input module and a pulse frequency selection module, the input module is used for inputting peak current and pulse frequency, the control module is used for automatically matching base current through the input peak current, and the output module is used for outputting corresponding pulse welding current through the peak current, the base current, the pulse frequency and a preset duty ratio.
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| CN112894079B (en) | 2022-12-09 |
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