CN209288502U - A kind of system determining weld polarity based on voltage - Google Patents
A kind of system determining weld polarity based on voltage Download PDFInfo
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- CN209288502U CN209288502U CN201821756101.1U CN201821756101U CN209288502U CN 209288502 U CN209288502 U CN 209288502U CN 201821756101 U CN201821756101 U CN 201821756101U CN 209288502 U CN209288502 U CN 209288502U
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Abstract
The utility model discloses a kind of systems that weld polarity is determined based on voltage, including the source of welding current, wire-feed motor, sample circuit, decision circuit, control device, wire-feed motor signal cable；Anode interface, cathode interface, signaling interface are installed outside the source of welding current；Cable interface, welding gun interface, wire-feed motor signaling interface are provided with outside the wire-feed motor；The sample circuit is placed in inside the source of welding current, for receive from source of welding current anode interface, cathode interface, signaling interface voltage, and the decision circuit being transmitted to thereafter is determined.The decision circuit is based on voltage decision rule and determines that weld polarity, control device determine the operating or stopping of the result control source of welding current based on weld polarity mode.The utility model can quickly determine weld polarity, avoid the welding defect as caused by polarity wrong, while this system circuit structure is simple, easy to spread, realization.
Description
Technical field
The present invention relates to semi-automatic welding field more particularly to a kind of systems that weld polarity is determined based on voltage.
Background technique
It just connects, abbreviation EN, refers to that workpiece connects source of welding current anode, welding rod welding wire connects the connection of power cathode；Reversal connection,
Abbreviation EP refers to that workpiece connects source of welding current cathode, and welding rod welding wire connects the connection of positive pole.All welding procedures, all
Regulation can be clearly made to weld polarity.In general, the connection of EN is used to have DC argon arc welding, cellulose root
The techniques such as weldering, medicine core non gas shielded welding；The connection of the EP used has the techniques such as common welding rod weldering, Welding Machine.It uses
EN welding gas protects semi-automatic welding technique, will lead to that arc burning is unstable, it is very big to splash, and is easy to generate stomata；
DC argon arc welding is welded using EP, will lead to that tungsten electrode temperature is excessively high and scaling loss is too fast；Medicine core non gas shielded welding is welded using EP, can be led
Cause deposition rate low, coating protecting effect is poor, is also easy to produce welding defect.
Outdoors when construction operation, the movement of welding equipment is very frequent, and on-site cable is more, is easy EN/EP wrong；
Once the connection type of mistake is not found in time, then it will lead to welding defect.
The source of welding current provides welding machine anode and welding machine cathode as output, connection type belong to be directly connected to workpiece or
Wire-feed motor (welding gun), by workpiece, is returned directly to cathode after welding current is by anode outflow；Semi-automatic arc welder generally used now,
It has no idea to detect EN/EP polarity, i.e., EN/EP can not be judged.
Summary of the invention
An object of the present invention at least that, for how to overcome the above-mentioned problems of the prior art, provide one kind
Simple circuit, structure be simple, the system easy to spread that weld polarity is determined based on voltage, can be accurately judged to welding pole
Property, it avoids the occurrence of polarity and connects wrong problem.
To achieve the goals above, the technical solution adopted by the present invention includes following aspects.
A kind of system determining weld polarity based on voltage, described includes: the source of welding current, wire-feed motor, sample circuit, judgement
Circuit, control device, wire-feed motor signal cable；
The source of welding current, outside anode interface, cathode interface, signaling interface are installed, inside have control device；
Wherein anode interface represents the output cathode of the source of welding current, and cathode interface represents the output negative pole of the source of welding current, and signal connects
Mouth is the source of welding current and the external interface for carrying out information exchange；
The wire-feed motor, outside be provided with cable interface, welding gun interface, wire-feed motor signaling interface；It is internally provided with
Wire feed electric cable, wire feed electric cable one end are connect with cable interface, and the other end is connect with welding gun interface；
The wire-feed motor signal cable is placed in inside wire-feed motor, and one end is connect with wire-feed motor signaling interface, the other end with
The connection of wire-feed motor cable interface；
The sample circuit is placed in inside the source of welding current, and input terminal connects with the anode interface of the source of welding current, cathode respectively
Mouth, signaling interface electrical connection, output end are electrically connected with decision circuit；To connect to form electric current with welding gun, workpiece in whole system
Sampling source of welding current anode interface when having voltage signal input at circuit, source of welding current signaling interface, source of welding current cathode interface,
The voltage signal of source of welding current signaling interface is simultaneously transferred to decision circuit；
The decision circuit is placed in inside the source of welding current, and input terminal is electrically connected with sample circuit, and output end and control fill
Electrical connection is set, to determine to control device transmission weld polarity mode as a result, being determined by control device based on weld polarity mode
As a result the corresponding instruction of output.
Preferably, a kind of system being determined weld polarity based on voltage, the source of welding current signaling interface and wire-feed motor are believed
The electrical connection of number interface.
Preferably, a kind of system determining weld polarity based on voltage, the electricity that the source of welding current signaling interface receives
Press signal be by wire-feed motor signal cable, wire-feed motor signaling interface transmission come wire-feed motor cable interface at voltage letter
Number.
Preferably, a kind of system being determined weld polarity based on voltage, the decision circuit are received sample circuit and are acquired
Voltage signal and based on voltage decision rule carry out weld polarity judgement；
The voltage decision rule are as follows:
WhenWhen, it is determined as the first weld polarity mode；
WhenWhen, it is determined as the second weld polarity mode；
Wherein, V+For source of welding current cathode voltage；VsFor source of welding current signaling interface voltage.
Preferably, a kind of system being determined weld polarity based on voltage, the control device are based on weld polarity mode and sentenced
Determining the corresponding instruction of result output includes:
When the practical judgement result difference of weld polarity mode and weld polarity mode that technique requires, control device output
Stop the instruction that reports an error；When the weld polarity mode that technique requires is identical as the practical judgement result of weld polarity mode, control dress
Set output operation instruction.
Preferably, a kind of system determining weld polarity based on voltage, the whole system connect to be formed with welding gun, workpiece
The mode of current loop includes:
The anode interface of the source of welding current is electrically connected with workpiece, the cathode interface of the source of welding current and the cable interface electricity of wire-feed motor
Connection, the welding gun interface of wire-feed motor are electrically connected with welding gun；Or the anode interface of the source of welding current and the cable interface of wire-feed motor are electrically connected
It connects, the welding gun interface of wire-feed motor is electrically connected with welding gun, and workpiece is electrically connected with the cathode interface of the source of welding current.
In conclusion by adopting the above-described technical solution, the present invention at least has the advantages that
By increasing the design of signal wire, sample circuit, decision circuit, can be realized to welding positive-negative polarity connection type
It is accurately identified and is determined, avoid the welding defect because of the nonconforming appearance of polarity；
Detailed description of the invention
Fig. 1 is the system structure diagram that the utility model illustratively determines weld polarity based on voltage；
Fig. 2 is that the utility model is illustratively just connecing technique connection schematic diagram；
Fig. 3 is that the utility model is illustratively reversely connected technique connection schematic diagram.
Detailed description of the invention: the 100- source of welding current, 101- anode interface, 102- signaling interface, 103- cathode interface, 104- sampling
Circuit, 105- decision circuit, 106- control device, 200- wire-feed motor, 201- cable interface, 202- wire-feed motor signaling interface,
203- welding junction, 203- wire feed electric cable, 204- wire-feed motor signal cable, 300- welding gun, 400- workpiece.
Specific embodiment
With reference to the accompanying drawings and embodiments, the present invention will be described in further detail, so that the purpose of the present invention, technology
Scheme and advantage are more clearly understood.It should be appreciated that described herein, specific examples are only used to explain the present invention, and does not have to
It is of the invention in limiting.
Fig. 1 shows a kind of system that weld polarity is determined based on voltage according to an exemplary embodiment of the present invention.The reality
The system for applying example specifically include that the source of welding current 100, wire-feed motor 200, sample circuit 104, decision circuit 105, control device 106,
Wire-feed motor signal cable 204.
Wherein, being sequentially installed with anode interface 101 outside the source of welding current 100 from right to left, (anode represents welding electricity
The output cathode in source), signaling interface 102 (with the external interface for carrying out information exchange), (cathode represents to be welded cathode interface 103
Connect the output negative pole of power supply).
Cable interface 201, welding gun interface 203, wire-feed motor signaling interface 202 are provided with outside the wire-feed motor 200, in
Portion is provided with wire feed electric cable 204 (for example, using the round cable of BVV copper core polyvinyl chloride-insulated polyvinyl chloride).
The wire-feed motor signal cable 204 is placed in inside wire-feed motor 200, and one end is connect with wire-feed motor signaling interface 202,
The other end is connect with wire-feed motor cable interface 201.There are also another equivalent connections i.e. by signal electricity for the wire-feed motor signal cable
One end of cable is connect with wire-feed motor signaling interface, and the other end is connect with welding gun interface.
Wherein wire-feed motor signaling interface 202 is electrically connected with the signaling interface 102 of the source of welding current, so that wire-feed motor and welding electricity
Source carries out information exchange, so that the voltage signal that source of welding current signaling interface receives is wire-feed motor cable interface (welding gun interface)
The voltage signal of output.204 one end of wire feed electric cable is connect with cable interface 201, and one end is connect with welding gun interface 203, with
Form welding access.
The sample circuit 104 is placed in inside the source of welding current 100, input terminal respectively with the anode interface of the source of welding current
101, cathode interface 103, signaling interface 102 are electrically connected, and output end is electrically connected with decision circuit 105；In whole system and weldering
Rifle, workpiece connect and to form current loop, have at the source of welding current signaling interface when voltage signal input, and (i.e. whole system is according to just connecing
Or reversal connection connection type formed current loop when) sampling source of welding current anode interface 101, source of welding current cathode interface 103,
The voltage signal of source of welding current signaling interface 102 is simultaneously transferred to decision circuit 105.
The decision circuit 105 is placed in inside the source of welding current 100, and input terminal is electrically connected with sample circuit 104, output end
It is electrically connected with control device 106.When decision circuit 105 receives, sample circuit 104 is collected to be connect from source of welding current anode
Mouthfuls 101, after the voltage signal of signaling interface 102, cathode interface 103, weld polarity can be sentenced based on voltage decision rule
It is fixed.Its decision rule are as follows: with source of welding current cathode interface voltage for 0 current potential, source of welding current anode interface voltage is V+, welding electricity
The voltage signal that source signal interface arrives is VS。
WhenWhen, it is determined as the first weld polarity mode (EN just connects mode)；
WhenWhen, it is determined as the second weld polarity mode (EP is reversely connected mode)；
The principle of the decision rule is: when whole system connect to form current loop with welding gun, workpiece, due to electricity
The anti-presence of roadlock, the voltage at the collected source of welding current signaling interface of sample circuit institute, can between power cathode voltage with
Between positive pole voltage, i.e., the voltage at signaling interface can be higher than power cathode voltage, be lower than positive pole voltage, EN mode
When (just connecing mode), the cathode of wire-feed motor cable socket interface to the source of welding current, source of welding current signaling interface can receive close
The voltage signal of source of welding current cathode voltage (0 current potential)；When EP mode (reversal connection mode), wire-feed motor cable interface is connected to welding
The anode of power supply, source of welding current signaling interface can be received close to source of welding current cathode voltage (VS) voltage signal.
Weld polarity mode judgement result can be transferred to control thereafter after it determined polarity of voltage by decision circuit 105
Device 106, the control device 106 are the host of the source of welding current, and the host of the source of welding current can be sentenced based on weld polarity mode
Determine the operating or stopping of the result control source of welding current.At this point, if technique requires to be EN mode, and the practical judgement knot of decision circuit
When fruit is EP mode, source of welding current host meeting decision polarity wrong terminates welding and simultaneously reports an error；Likewise, if technique requires to be EP
Mode, and when actually determining result for EN mode, source of welding current host decision polarity wrong are terminated to weld and are simultaneously reported an error.Only when
When the mode that technique requires is identical with practical determinating mode, it is correct that the host of the source of welding current understands decision polarity, and each component can be after
Reforwarding turns, and completes welding.
Further, sample circuit used in the present invention, decision circuit can utilize conventional hardware circuit at one piece
(as realized that sampling, voltage comparator LM324, LM358 carry out voltage judgement using RMS conversion chip AD736), electricity
Road is succinct, reliable performance.Sample circuit, decision circuit can also be realized by corresponding hardware circuit.
Specifically, as shown in Fig. 2, system connection type is as follows in the case where the technique of EN (the first weld polarity mode) requires:
The anode interface of the source of welding current is electrically connected with workpiece, the cathode interface of the source of welding current and the cable interface electricity of wire-feed motor
Connection, the welding gun interface of wire-feed motor is electrically connected with welding gun, at this point, electric arc can be generated between welding gun and workpiece, so as to form entire
Current loop between system and welding gun, workpiece.
At this point, electric current flows to workpiece from the anode interface of the source of welding current, weldering is passed to by the electric arc between workpiece and welding gun
Rifle, then wire feed machine welding gun interface is flowed to by welding gun, electric current flows to wire feed electric cable from welding gun interface, using wire feed electric cable
Interface flows to source of welding current cathode interface, forms complete current loop.It is connected in EN technique lower wire feeding hose electric cable interface
The cathode of the source of welding current, source of welding current signaling interface can receive the voltage signal close to source of welding current cathode voltage, sentence at this time
The first weld polarity mode (just connecing mode) can be determined as by determining circuit, and source of welding current host is transferred to be judged.If work at this time
Skill requires to be positive to connect, then polarity connection is correct, continues to weld；Conversely, if technique requires as reversal connection, polarity connection error, weldering
Electric power host is connect to stop welding and reporting an error.
Specifically, as shown in figure 3, system connection type is as follows in the case where the technique of EP (the second weld polarity mode) requires:
The anode interface of the source of welding current is electrically connected with the cable interface of wire-feed motor, and welding gun interface and the welding gun of wire-feed motor are electrically connected
It connects, workpiece is electrically connected with the cathode interface of the source of welding current, and electric arc can be generated between welding gun and workpiece.
At this point, electric current in the entire system flows to wire-feed motor cable interface from the anode interface of the source of welding current, by sending
Silk electric cable interface flows to wire feed electric cable, flows to wire feed machine welding gun interface by wire feed electric cable, is connect by wire feed machine welding gun
Mouth flows to welding gun, generates electric arc, flows to workpiece, returns to source of welding current cathode interface by workpiece, forms current loop.Exist at this time
Under the connection of EP technique, wire-feed motor cable interface is connected to the anode of the source of welding current, and source of welding current signaling interface can receive close
Source of welding current cathode voltage (VS) voltage signal, decision circuit is to determine that it is the second weld polarity mode (reversal connection mode).
If technique requires to be reversely connected, polarity connection is correct, continues to weld；Conversely, polarity connection is wrong if technique requires to be positive to connect
Accidentally, source of welding current host stops welding and reporting an error.
In above-described embodiment, by the way that a signal wire is added, and the single chip circuit with sampling, decision-making function is configured,
It can be realized and welding positive-negative polarity connection type is accurately identified and determined, avoid the welding because of the nonconforming appearance of polarity
Defect.
The above, the only detailed description of the specific embodiment of the invention, rather than limitation of the present invention.The relevant technologies
The technical staff in field is not in the case where departing from principle and range of the invention, various replacements, modification and the improvement made
It should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of system for determining weld polarity based on voltage, which is characterized in that described includes: the source of welding current, wire-feed motor, sampling
Circuit, decision circuit, control device, wire-feed motor signal cable；
The source of welding current, outside anode interface, cathode interface, signaling interface are installed, inside have control device；Wherein
Anode interface represents the output cathode of the source of welding current, and cathode interface represents the output negative pole of the source of welding current, and signaling interface is
The source of welding current and the external interface for carrying out information exchange；
The wire-feed motor, outside be provided with cable interface, welding gun interface, wire-feed motor signaling interface；It is internally provided with wire feed
Electric cable, wire feed electric cable one end are connect with cable interface, and the other end is connect with welding gun interface；
The wire-feed motor signal cable is placed in inside wire-feed motor, and one end is connect with wire-feed motor signaling interface, the other end and wire feed
The connection of electric cable interface；
The sample circuit is placed in inside the source of welding current, input terminal respectively with the anode interface of the source of welding current, cathode interface, letter
The electrical connection of number interface, output end are electrically connected with decision circuit；With whole system connect with welding gun, workpiece to be formed current loop,
Sampling source of welding current anode interface, source of welding current cathode interface, welding when having voltage signal input at source of welding current signaling interface
The voltage signal of power supply signal interface is simultaneously transferred to decision circuit；
The decision circuit is placed in inside the source of welding current, and input terminal is electrically connected with sample circuit, output end and control device electricity
Connection, to determine to control device transmission weld polarity mode as a result, being based on weld polarity mode by control device determines result
The corresponding instruction of output.
2. system according to claim 1, which is characterized in that the source of welding current signaling interface and wire-feed motor signaling interface
Electrical connection.
3. system according to claim 2, which is characterized in that the voltage signal that the source of welding current signaling interface receives
As by wire-feed motor signal cable, wire-feed motor signaling interface transmission come wire-feed motor cable interface at voltage signal.
4. system according to claim 1, which is characterized in that the decision circuit receives sample circuit voltage collected
Signal simultaneously carries out weld polarity judgement based on voltage decision rule；
The voltage decision rule are as follows:
WhenWhen, it is determined as the first weld polarity mode；
WhenWhen, it is determined as the second weld polarity mode；
Wherein, V+For source of welding current cathode voltage；VsFor source of welding current signaling interface voltage.
5. system according to claim 1, which is characterized in that the control device is based on weld polarity mode and determines result
Instruction includes: accordingly for output
When the practical judgement result difference of weld polarity mode and weld polarity mode that technique requires, control device output stops
Report an error instruction；When the weld polarity mode that technique requires is identical as the practical judgement result of weld polarity mode, control device is defeated
Operation instruction out.
6. system according to claim 1, which is characterized in that the whole system connect to form electric current with welding gun, workpiece
The mode in circuit includes:
The anode interface of the source of welding current is electrically connected with workpiece, and the cathode interface of the source of welding current and the cable interface of wire-feed motor are electrically connected
It connects, the welding gun interface of wire-feed motor is electrically connected with welding gun；Or the anode interface of the source of welding current is electrically connected with the cable interface of wire-feed motor,
The welding gun interface of wire-feed motor is electrically connected with welding gun, and workpiece is electrically connected with the cathode interface of the source of welding current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756101.1U CN209288502U (en) | 2018-10-26 | 2018-10-26 | A kind of system determining weld polarity based on voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756101.1U CN209288502U (en) | 2018-10-26 | 2018-10-26 | A kind of system determining weld polarity based on voltage |
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| CN209288502U true CN209288502U (en) | 2019-08-23 |
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| CN201821756101.1U Active CN209288502U (en) | 2018-10-26 | 2018-10-26 | A kind of system determining weld polarity based on voltage |
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