CN202114377U - Voltage feedback circuit device for gas protected welder - Google Patents
Voltage feedback circuit device for gas protected welder Download PDFInfo
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- CN202114377U CN202114377U CN2010206550197U CN201020655019U CN202114377U CN 202114377 U CN202114377 U CN 202114377U CN 2010206550197 U CN2010206550197 U CN 2010206550197U CN 201020655019 U CN201020655019 U CN 201020655019U CN 202114377 U CN202114377 U CN 202114377U
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Abstract
The utility model discloses a voltage feedback circuit device for a gas protected welder. Accurate actual voltage values are obtained by sampling voltage of a wire feeding mechanism by means of the voltage feedback circuit device, more stable voltage at an output end of the welder in welding can be guaranteed, performance of the welder is improved, and welding quality is guaranteed.
Description
Technical field
The utility model relates to a kind of voltage feedback circuit that is used for the flat characteristic gas-shielded welder, particularly a kind of voltage feedback circuit device that is used for gas guarantor bonding machine.
Background technology
Flat characteristic gas shielded welding machine both domestic and external is in actual welding, because the welding machine volume moves inconvenience more greatly, in order to adapt to remote multi-faceted welding, wire feeder and welding machine split-type design.The output cable that is connected welding machine positive-negative output end and wire feeder through lengthening enlarges the welding moving range with the control cable.Because it all is that certain resistance is arranged that metal is switched under normal conditions, the transmission power supply can produce certain loss, just line loss at a distance.Under the certain situation in online footpath, the length of line is directly proportional with line loss.In actual use less copper cable lines of line loss that adopt more.The flatness of the response gas-shielded welder is when normal welding, and the operating voltage of output and the operating current of output need satisfy formula U=14+0.05I.The operating voltage of U when connecing wherein, I has operating current when welding.After operating current and operating voltage coupling was correct, welding just can be stablized and carried out, and little, the welding quality of splashing accords with full technological requirement.On the other hand because the operating voltage of welding machine control circuit and the feedback sample of operating current are the positive-negative output ends that is connected welding machine with lead.Such as the flat characteristic gas shielded welding machine of a 500A, be operated under the maximum current 500A state, according to flat characteristic formula U=14+0.05I, we can obtain the welding machine normal working voltage needs 39V, and output length is used 50m, and line directly is 50mm
2The copper cable line is according to the resistivity P=0.017 Ω * mm of copper
2/ m.The resistance R that can obtain this root cable is 0.017 Ω, again according to Ohm's law U=R * I.Can obtain this root cable is 8.5V because of the pressure drop that line loss produces.That is to say that in the actual welding process, the voltage of welding machine positive-negative output end has reached 39V, is 30.5V but the only remaining 39V of actual welding voltage that arrives wire feeder owing to the reason of line loss deducts 8.5V, has not met welding requirements, has influenced welding quality.Add the easy temperature influence of resistance of metal and change, changes in resistance will certainly have influence on the variation of actual welding voltage, because the not voltage stabilizing of weldingvoltage will further have influence on welding quality.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of voltage feedback circuit device that is used for gas-shielded welder, guarantees that welding machine welding terminal voltage in welding is more stable, improves welder performance, guarantees the welding procedure quality.
The present invention realizes through following technical scheme:
A kind of voltage feedback circuit device that is used for gas-shielded welder is carried the welding gun interface A of lead D from wire feeder of the positive voltage value of feedback of electric welding machine, is connected to the Remote Control Interface of welding machine, links together with lead E and resistance R, lead C from Remote Control Interface again; The machine output head anode is with the end of lead B connecting resistance R, and the other end of resistance R connects lead E through connecting lead C, and lead C is linked into the control circuit of welding machine, and the lead F of conveying negative pole of output end feedback voltage receives the control circuit of welding machine.
The control cable of said wire feeder is the seven core cable line, and said lead D is wherein one, and the plug of receiving the welding machine remote control interface is seven core aviation plugs, and the Remote Control Interface of welding machine is seven core aviation sockets.
The said resistance R that is connected to lead E, C, B is a semistor, and high more its internal resistance of the temperature of resistance is big more, and the specification that is preferably resistance R is MZ126N.
The real work voltage sampling keeps the voltage feedback circuit of original negative output terminal; Positive output end operating voltage feedback feeds back to control circuit through semistor R; Protect the real work voltage feedback line of the external single line of welding gun interface by gas again, feed back to the welding machine control circuit through Remote Control Interface as wire feeder.Because feedback signal is a voltage signal, electric current is very little to have only tens milliamperes, though the control cable is also very long, line loss is very little to the influence of voltage signal, can not produce pressure drop.Thermistor R plays following effect in the circuit: the current potential at big resistance two ends is the same when the feedback voltage of taking a sample from the feedback voltage and the output head anode of wire feeder sampling is the same, so do not work; When the feedback voltage from the wire feeder sampling is lower than the feedback voltage of output head anode sampling; Thermistor can be worked because of two terminal potentials are different; At this moment thermistor because of electric current pass through generate heat because positive temperature thermistor characteristic, promptly the temperature of temperature-sensitive resistance is high more; The characteristics that its resistance is big more, feedback voltage will be that virtual voltage feeds back in the welding machine control circuit with the low end of current potential; When for a certain reason; When fracture occurring such as the voltage feedback line of receiving wire feeder; And the feedback voltage of welding machine still can feed back to the control circuit through thermistor R from the positive output end of welding machine, this appearance one come can not cause the welding machine overcurrent to damage because welding machine does not have feedback voltage.
The beneficial effect of the utility model is:
1, this circuit structure can be used for any type of flat characteristic gas-shielded welder, and inverter type welder, thyrister form welding machine all can adopt this circuit.
2, improved welding procedure, made welding forming more attractive in appearance, welding quality is more reliable.
3, reduce welding machine because of the damage that the feedback line fracture causes, improved the reliability of equipment.
Description of drawings
Fig. 1 is the circuit structure of the utility model and the sketch map of frame for movement
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further specified.
Like Fig. 1, be the circuit structure of the utility model and the sketch map of frame for movement.
Inner at welding machine, the voltage feedback line F of end negative pole receives control circuit, and the voltage feedback conductor B of output head anode receives the end of thermistor R, and thermistor R selects MZ126N for use.The output Remote Control Interface is 7 a cores boats mouthful socket, wherein label be No. 7 cores as voltage feedback conductor E, feedback conductor E receives the other end of thermistor R, the two-way feedback signal feeds back to the control circuit of welding machine again from feedback conductor C.
Wire feeder from sending device welding gun interface, is just received the other end A of the anodal output cable of welding machine, meets a voltage feedback conductor D to No. 7 pin of 7 core aviation plugs, and is connected with seven core aviation sockets on the welding machine remote control interface.
Claims (3)
1. one kind is used for the voltage feedback circuit device that gas is protected bonding machine; It is characterized in that carrying the welding gun interface (A) of lead (D) from wire feeder of the positive voltage value of feedback of electric welding machine; Be connected to the Remote Control Interface of welding machine, link together with lead (E) and resistance (R), lead (C) from Remote Control Interface again; The machine output head anode is with an end of lead (B) connecting resistance (R), and the other end of resistance (R) connects lead E through connecting lead (C), and lead (C) is linked into the control circuit of welding machine, and the lead F of conveying negative pole of output end feedback voltage receives the control circuit of welding machine.
2. the voltage feedback circuit device that is used for gas guarantor bonding machine as claimed in claim 1; The control cable that it is characterized in that said wire feeder is the seven core cable line; Said lead (D) is wherein one; The plug of receiving the welding machine remote control interface is seven core aviation plugs, and the Remote Control Interface of welding machine is seven core aviation sockets.
3. the voltage feedback circuit device that is used for gas guarantor bonding machine as claimed in claim 1 is characterized in that the said resistance (R) that is connected to lead (E), (C), (B) is semistor, and the specification that is preferably resistance R is MZ126N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206550197U CN202114377U (en) | 2010-12-13 | 2010-12-13 | Voltage feedback circuit device for gas protected welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206550197U CN202114377U (en) | 2010-12-13 | 2010-12-13 | Voltage feedback circuit device for gas protected welder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202114377U true CN202114377U (en) | 2012-01-18 |
Family
ID=45455475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206550197U Expired - Fee Related CN202114377U (en) | 2010-12-13 | 2010-12-13 | Voltage feedback circuit device for gas protected welder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202114377U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400186A (en) * | 2014-11-27 | 2015-03-11 | 郭智峰 | Cascaded electric welding machine power supply topological structure |
| CN108242634A (en) * | 2017-05-25 | 2018-07-03 | 广西梧州四海建筑工程有限责任公司 | A kind of bonding machine connects equipment |
| CN108258490A (en) * | 2017-05-25 | 2018-07-06 | 广西梧州四海建筑工程有限责任公司 | A kind of bonding machine attachment device |
-
2010
- 2010-12-13 CN CN2010206550197U patent/CN202114377U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400186A (en) * | 2014-11-27 | 2015-03-11 | 郭智峰 | Cascaded electric welding machine power supply topological structure |
| CN104400186B (en) * | 2014-11-27 | 2016-02-03 | 郭智峰 | Tandem type welder power topological structure |
| CN108242634A (en) * | 2017-05-25 | 2018-07-03 | 广西梧州四海建筑工程有限责任公司 | A kind of bonding machine connects equipment |
| CN108258490A (en) * | 2017-05-25 | 2018-07-06 | 广西梧州四海建筑工程有限责任公司 | A kind of bonding machine attachment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20141213 |
|
| EXPY | Termination of patent right or utility model |