CN105033393A - Direct-current heating circuit and electric soldering iron formed by same - Google Patents
Direct-current heating circuit and electric soldering iron formed by same Download PDFInfo
- Publication number
- CN105033393A CN105033393A CN201510477849.2A CN201510477849A CN105033393A CN 105033393 A CN105033393 A CN 105033393A CN 201510477849 A CN201510477849 A CN 201510477849A CN 105033393 A CN105033393 A CN 105033393A
- Authority
- CN
- China
- Prior art keywords
- heating
- thermocouple
- direct
- electric iron
- electric capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
- B23K3/03—Soldering irons; Bits electrically heated
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
- B23K3/03—Soldering irons; Bits electrically heated
- B23K3/0392—Soldering irons; Bits electrically heated the heat being generated by contact resistance
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/04—Heating appliances
- B23K3/047—Heating appliances electric
- B23K3/053—Heating appliances electric using resistance wires
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
Abstract
The invention discloses a direct-current heating circuit which comprises a triode, a diode, an inductor, a first capacitor, a second capacitor and a heating wire. The invention further discloses a direct-current heating electric soldering iron formed according to the direct-current heating circuit. The direct-current heating electric soldering iron comprises a soldering bit and a heating element and further comprises a ceramic tube and a thermocouple. The soldering bit is provided with a cavity, and the ceramic tube is arranged in the cavity. The heating element is arranged on the outer wall of the ceramic tube, and the thermocouple is arranged in the ceramic tube. The direct-current heating of the heating element of the electric soldering iron is achieved through the improvement of the direct-current heating circuit and the data collecting speed of a thermocouple sensor can reach the sampling rate as high as hundreds of times per second; the disturbance which causes temperature deviation is avoided; during the soldering with the soldering bit, a microcontroller unit (MCU) can quickly read temperature variations of the soldering bit and linearly improve the power of the heating wire, so that the soldering bit always maintains very low temperature fluctuation, and the welding quality is greatly improved while the welding speed of an automatic welding robot is greatly improved.
Description
Technical field
The present invention relates to soldering appliance field, refer to the electric iron of a kind of DC heating circuit and formation thereof especially.
Background technology
The technology of constant temperature electric iron heating experienced by several change: 1. constant temperature electric iron is the earliest all adopt ceramic heater heating, and solder horn becomes Replacement Part, and coil and thermocouple separately, use comparator to regulate and constant temperature; 2. bring into use one directly to enter inside solder horn by Heat Conduction Material encapsulation by heating wire and thermocouple by Japanese brand, then use MCU to carry out the stable of control temperature, and solder horn is reduced to two lines connections by the principle utilizing thermocouple can be connected in series the 3rd metal.
2 kinds of above technical methods are all the mode of heatings that have employed on-off type when heating, time this mode heats, the fluctuation of temperature is larger, especially obvious when welding, but the epoch of former manual welding, due to the reason of speed of welding, the fluctuation of temperature is all acceptable in certain scope, because in the process of human weld when welding personnel observe welding situation not good time will take to extend the measure such as heat time to ensure welding quality, therefore this mode of heating is all can meet to use needs in the past always.
Along with the needs that progress and the product automation of technology are produced, the product that a lot of people welded in the past all starts to be converted to automatic welding machine people and has welded, because the lifting of speed of welding just starts to improve for the requirement of electric iron temperature stability, and the weld interval of solder joint is all fixing when robot welding, therefore part solder joint will be caused when welding when flatiron temperature fluctuates time because flatiron temperature causes solder joint failure welding not, therefore the temperature stability for electric iron requires to start to improve, the room for improvement of the control technology of electric iron is originally very little, the heating technique of electric iron performance can greatly be improved in the urgent need to a kind of in market.
Summary of the invention
The present invention proposes the electric iron of a kind of DC heating circuit and formation thereof, solves the problem of electric iron temperature stability deficiency in prior art.
Technical scheme of the present invention is achieved in that a kind of DC heating circuit, comprises triode, diode, inductance, the first electric capacity, the second electric capacity and heating wire; The source ground of triode, the drain electrode of triode connects the positive pole of diode and one end of inductance respectively, the negative pole of diode connects DC voltage, the negative pole of diode also connects the first electric capacity in parallel, the second electric capacity and heating wire, and the first electric capacity, the second electric capacity are connected the other end of inductance with the other end of heating wire.
Further, the grid of triode connects pulse width modulating signal.Further, triode is N channel field-effect pipe.
The invention allows for a kind of DC heating electric iron, form according to a kind of DC heating circuit, comprise solder horn and heater element, also comprise earthenware and thermocouple; Solder horn is provided with cavity, and earthenware is established in the cavities, and heater element is located at earthenware outer wall, and thermocouple is located at ceramic tube inside.
Further, heater element is heating wire.Further, heating wire is wrapped in earthenware outer wall.
Further, earthenware is the cylindrical shape of hollow.
Further, solder horn inside is filled with High-heat-conductiviinsulation insulation material.
Further, thermocouple is connected with the thermocouple sensor for collecting temperature data.
Beneficial effect of the present invention is:
1, the innovation of principle of heating: first the mode of pure DC heating is applied to electric iron field, uses the method for DC heating first at electric iron heating art;
2, the innovation of heater circuit: DC-DC voltage transformation technology be applied to first above the control of electric iron heating wire, makes application DC heating become complete feasible technology.
3, the extensibility of flatiron power: along with the further increase of electric iron heating power is increased to 200 watts or larger power by the power of 90 watts of current main flow, if use the temperature fluctuation of existing flatiron when welding to become more to be difficult to control, if the mode of separating with thermocouple when using heating and use PWM exchanges control heater strip power when the interfering signal of thermocouple can be caused to strengthen further, make the process of interfering signal more and more difficult, if use DC heating just without the need to worrying the signal interference problem of thermocouple, heating power can easily be increased to larger simultaneously, only need to carry out the simple adaptive problem that just can solve high-power step-down to the components and parts such as metal-oxide-semiconductor and commutation diode, and better temperature stability can be had, very little temperature fluctuation range is (if the method for the increase employing PWM break-make heating along with power, temperature can rise rapidly when heating wire energising, reduce rapidly when power-off, temperature fluctuation range is increased, the fluctuation of temperature becomes and is more difficult to control).
4, the present invention easy expansion can need the field of the low interfering signal of low-voltage high-precision constant temperature to other
5, through can further reduce costs the further research of this technology, make this technology can carry out the upgrading of a technology to electric iron industry with higher temperature-controlled precision, allow the performance of electric iron be greatly improved.
6, when not having interfering signal, MCU can carry out high speed thermometric to thermocouple, therefore temperature variation curve can be generated, make electric iron more intelligent, by the analysis to temperature variation curve, the temperature control strategy of flatiron can carry out automatic learning, more adapting to the use habit of user, by making the control of temperature more intelligent to the instruction of software, the functions such as intelligent sleep for electricity saving can be realized when not using any external sensor.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of a kind of DC heating circuit of the present invention;
Fig. 2 is the structural representation of a kind of DC heating electric iron of the present invention;
Fig. 3 is MCU control flow chart.
In figure: 1-solder horn; 2-heat-generating units; 3-electroheat pair; 4-earthenware.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the present invention proposes a kind of DC heating circuit, comprise triode, diode, inductance, the first electric capacity, the second electric capacity and heating wire; The source ground of triode, the drain electrode of triode connects the positive pole of diode and one end of inductance respectively, the negative pole of diode connects DC voltage, the negative pole of diode also connects the first electric capacity in parallel, the second electric capacity and heating wire, and the first electric capacity, the second electric capacity are connected the other end of inductance with the other end of heating wire.The grid of triode connects pulse width modulating signal.Triode is N channel field-effect pipe.A kind of topological structure (step-down of N-channel MOS pipe low side) of DC-DC step-down that what this circuit adopted is, because N-channel MOS pipe shares GND as a reference with MCU after applying this circuit, so MCU can in the scope of 5-20V light driven MOS pipe, and the switching speed of MOS easily can reach hundreds of KHZ after using push-pull configuration, the whole efficiency of circuit is greatly improved, simplify the design of circuit simultaneously, and the heating voltage at RS1 heating wire two ends is pure direct current, by changing the heating power of the adjustment heater strip that the dutycycle of PWM frequency can be very linear, in the process of adjustment, heater strip only produces the change of general power, can not the transformation in generation current direction, heater strip can not produce electromagnetic interference completely, and because the power of galvanic Serial regulation characteristic heater strip can be very constant, the precision of constant temperature can be accomplished very high, and change very linear, there will not be and significantly fluctuate.
The invention allows for a kind of DC heating electric iron, form according to a kind of DC heating circuit, comprise solder horn and heater element, also comprise earthenware and thermocouple; Solder horn is provided with cavity, and earthenware is established in the cavities, and heater element is located at earthenware outer wall, and thermocouple is located at ceramic tube inside.Heater element is heating wire.Heating wire is wrapped in earthenware outer wall.Earthenware is the cylindrical shape of hollow.Solder horn inside is filled with High-heat-conductiviinsulation insulation material.Thermocouple is connected with the thermocouple sensor for collecting temperature data.The DC heating of electric iron heat generating components is achieved by the improvement of DC heating circuit, now the acquisition speed of thermocouple sensor easily can reach the sampling rate of thousands of times each second, and do not have to disturb the deviation causing temperature, the variations in temperature of solder horn can be read rapidly and the power of linear increase heating wire making in this way the MCU when flatiron welds, regulate the speed thousands of secondary in each second, therefore no matter the speed solder horn of speed of welding remains low-down temperature fluctuation, automatic welding machine people welding quality while speed of welding increases substantially be have also been obtained significantly improve.
The flow process of MCU control mode as shown in Figure 3, this control mode reads the data of temperature while heating, and be as the criterion with the setting value of constant temperature, heating part is remained at the temperature of setting, under this control mode, the change of external temperature can be read by MCU at faster speed, and the compensation of power is have already been maded when change appears in external temperature one, therefore external temperature just stops after declining by a small margin declining, the temperature of setting can be got back to gradually along with temperature further compensates the temperature when continuous rapid welding, and keep stationary temperature when keeping bonding speed constant always, this characteristic is just very applicable in time being applied to above automatic welding machine people, because automatic welding machine people has constant bonding speed, and can when welding the stationarity of temperature good, this appearance robot just can continue welding at faster speed, and the quality of solder joint can be ensured.
In sum, the present invention has following benefit:
1, the innovation of principle of heating: first the mode of pure DC heating is applied to electric iron field, uses the method for DC heating first at electric iron heating art;
2, the innovation of heater circuit: DC-DC voltage transformation technology be applied to first above the control of electric iron heating wire, makes application DC heating become complete feasible technology.
3, the extensibility of flatiron power: along with the further increase of electric iron heating power is increased to 200 watts or larger power by the power of 90 watts of current main flow, if use the temperature fluctuation of existing flatiron when welding to become more to be difficult to control, if the mode of separating with thermocouple when using heating and use PWM exchanges control heater strip power when the interfering signal of thermocouple can be caused to strengthen further, make the process of interfering signal more and more difficult, if use DC heating just without the need to worrying the signal interference problem of thermocouple, heating power can easily be increased to larger simultaneously, only need to carry out the simple adaptive problem that just can solve high-power step-down to the components and parts such as metal-oxide-semiconductor and commutation diode, and better temperature stability can be had, very little temperature fluctuation range is (if the method for the increase employing PWM break-make heating along with power, temperature can rise rapidly when heating wire energising, reduce rapidly when power-off, temperature fluctuation range is increased, the fluctuation of temperature becomes and is more difficult to control).
4, the present invention easy expansion can need the field of the low interfering signal of low-voltage high-precision constant temperature to other
5, through can further reduce costs the further research of this technology, make this technology can carry out the upgrading of a technology to electric iron industry with higher temperature-controlled precision, allow the performance of electric iron be greatly improved.
6, when not having interfering signal, MCU can carry out high speed thermometric to thermocouple, therefore temperature variation curve can be generated, make electric iron more intelligent, by the analysis to temperature variation curve, the temperature control strategy of flatiron can carry out automatic learning, more adapting to the use habit of user, by making the control of temperature more intelligent to the instruction of software, the functions such as intelligent sleep for electricity saving can be realized when not using any external sensor.
These are only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a DC heating circuit, is characterized in that: comprise triode, diode, inductance, the first electric capacity, the second electric capacity and heating wire; The source ground of described triode, the drain electrode of described triode connects the positive pole of described diode and one end of described inductance respectively, the negative pole of described diode connects DC voltage, the negative pole of described diode also connects the first electric capacity in parallel, the second electric capacity and heating wire, and described first electric capacity, the second electric capacity are connected the other end of described inductance with the other end of heating wire.
2. a kind of DC heating circuit according to claim 1, is characterized in that: the grid of described triode connects pulse width modulating signal.
3. a kind of DC heating electric iron according to claim 2, is characterized in that: described triode is N channel field-effect pipe.
4. a DC heating electric iron, a kind of DC heating circuit according to any one of claim 1-3 is made, and comprises solder horn and heater element, it is characterized in that: also comprise earthenware and thermocouple; Described solder horn is provided with cavity, and described earthenware is located in described cavity, and described heater element is located at described earthenware outer wall, and described thermocouple is located at described ceramic tube inside.
5. a kind of DC heating electric iron according to claim 4, is characterized in that: described heater element is heating wire.
6. a kind of DC heating electric iron according to claim 5, is characterized in that: described heating wire is wrapped in described earthenware outer wall.
7. a kind of DC heating electric iron according to claim 4, is characterized in that: described earthenware is the cylindrical shape of hollow.
8. a kind of DC heating electric iron according to claim 4, is characterized in that: described solder horn inside is filled with High-heat-conductiviinsulation insulation material.
9. a kind of DC heating electric iron according to claim 4, is characterized in that: described thermocouple is connected with the thermocouple sensor for collecting temperature data.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510477849.2A CN105033393A (en) | 2015-08-06 | 2015-08-06 | Direct-current heating circuit and electric soldering iron formed by same |
| PCT/CN2016/072455 WO2017020564A1 (en) | 2015-08-06 | 2016-01-28 | Dc heating circuit and electric soldering iron formed by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510477849.2A CN105033393A (en) | 2015-08-06 | 2015-08-06 | Direct-current heating circuit and electric soldering iron formed by same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105033393A true CN105033393A (en) | 2015-11-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510477849.2A Pending CN105033393A (en) | 2015-08-06 | 2015-08-06 | Direct-current heating circuit and electric soldering iron formed by same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105033393A (en) |
| WO (1) | WO2017020564A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017020564A1 (en) * | 2015-08-06 | 2017-02-09 | 深圳市尚进电子科技有限公司 | Dc heating circuit and electric soldering iron formed by same |
| CN108583977A (en) * | 2018-06-28 | 2018-09-28 | 温州赤焰科技有限公司 | The instantaneously heated bundling device of direct current safe voltage and its transient heating control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017020564A1 (en) * | 2015-08-06 | 2017-02-09 | 深圳市尚进电子科技有限公司 | Dc heating circuit and electric soldering iron formed by same |
| CN108583977A (en) * | 2018-06-28 | 2018-09-28 | 温州赤焰科技有限公司 | The instantaneously heated bundling device of direct current safe voltage and its transient heating control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017020564A1 (en) | 2017-02-09 |
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Application publication date: 20151111 |
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