CN106735664A - Method for welding - Google Patents
Method for welding Download PDFInfo
- Publication number
- CN106735664A CN106735664A CN201610842571.9A CN201610842571A CN106735664A CN 106735664 A CN106735664 A CN 106735664A CN 201610842571 A CN201610842571 A CN 201610842571A CN 106735664 A CN106735664 A CN 106735664A
- Authority
- CN
- China
- Prior art keywords
- soldering
- metal pipe
- heated object
- annular
- melting
- 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.)
- Granted
Links
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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/002—Soldering by means of induction heating
-
- 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
- B23K3/0475—Heating appliances electric using induction effects, e.g. Kelvin or skin effects
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Dermatology (AREA)
- General Health & Medical Sciences (AREA)
- General Induction Heating (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention provides a kind of not melting, permeating the bad method for welding of the such quality of melting and breakage of not enough and metal tube for solder when being prevented from induction brazing.In using the method for welding for being heated the heated object that upper metal pipe (1) is engaged and constituted with lower metal pipe (2) to the annular scolding tin (3) of use with the electric power that load coil (10) is supplied to soldering from high frequency electric source (6), detect annular scolding tin (3) there occurs melting after, the change of the load impedance of detection heated object (4), is automatically stopped the electric power supplied from high frequency electric source (6) to soldering load coil (10).
Description
Technical field
Method for welding the present invention relates to carry out soldering each other to metal tube.
Background technology
It is used in the application soldering in the mutual connection of metal tube of the heat exchanger of the air-conditioning equipments such as air regulator.Metal
The soldering of pipe configures solder by the junction surface of metal tube, afterwards, the heating part near junction surface is heated into solder fusing point
More than, the solder of melting is spread all over junction surface entirety, so as to realize.In order in the absence of void, permeate it is not enough, do not melt
Melt and the problems such as insufficient fill in the case of carry out the soldering of high-quality, be not only solder, in addition it is also necessary to which control includes junction surface
Neighbouring metal tube is in the overall temperature in interior heating part.As the construction method for meeting such condition, include and employ
The induction brazing of high-precision temperature controlled induction heating technique can be carried out.
In the past, as the method for carrying out using sensing heating soldering each other to metal tube, there are as below methods：Will be using temperature
Measurement means detect that temperature information is input into as feedback information obtained from the temperature near junction surface, based on feedback information
With the deviation between target temperature information by high frequency power supply to heating coil (referring for example to patent document 1).
Figure 11 is the figure for representing the conventional method for welding fed back to temperature information described in patent document 1.
At the soldering places 107 of axial length metallic conductor 105 and girth metallic conductor 106, by infrared emission thermometer
101 temperature detection informations for measuring are imported into sequencer 104 and high-frequency heating power circuit 100.Then, based on by
The target temperature of the setting of high-frequency heating temperature setting device 102 and the deviation of temperature detection information, by high-frequency heating power circuit 100
To the supply high frequency electric power of high-frequency heating inductor 103 to specifying the holding time.Afterwards, if reaching the regulation holding time of setting,
Then stop the supply of the RF power from high-frequency heating power circuit 100 for high-frequency heating inductor 103, complete pricker
Weldering.
Citation
Patent document
Patent document 1：No. 4407276 publication of JP patents
But, in the case of the temperature for determining heating part by infrared emission thermometer 101, with the temperature of heating part
Degree rises, due to the influence (such as the situation of reflectivity material high) of the surface state of heated object, only cannot by temperature
Completion to soldering exactly is managed.
Additionally, in the case of the completion for managing soldering using both temperature and times, if due to metal tube or pricker
The deviation of the shape or assembling relative position of material, the supply for carrying out time-based consistent RF power stops, then can produce
The qualities such as the melting and breakage that do not melt, permeate not enough and metal tube of raw solder are bad.
The content of the invention
Therefore, it is an object of the present invention to solve described problem, there is provided a kind of pricker when being prevented from induction brazing
That expects does not melt, permeates the bad method for welding of the such quality of melting and breakage of not enough and metal tube.
In order to reach the purpose, the method for welding that 1 mode of the invention is related to is utilized from high frequency electric source to soldering
Constituted to being engaged upper metal pipe with lower metal pipe using annular scolding tin with the electric power of load coil supply
The method for welding that is heated of heated object, in the method for welding, detecting after the annular scolding tin there occurs melting,
The load impedance of the heated object between the high frequency electric source and the heated object is detected by load impedance test section
Change, then, stop the electric power from the high frequency electric source to the supply of the soldering load coil.
Invention effect
As above, the method for welding involved by mode according to the present invention, does not rely on radiation thermometer
Temperature or time management, but sentenced by the detection of the change of the load impedance of heated object after the melting detection of annular scolding tin
Determine soldering completion, the supply of the electric power that stopping is supplied from high frequency electric source to soldering with load coil.Constituted due to so,
It is possible to not the melting of solder when preventing induction brazing, permeating the melting and breakage of not enough and metal tube so
Quality it is bad.
Brief description of the drawings
Fig. 1 is the soldering pie graph for implementing the method for welding of embodiments of the present invention.
Fig. 2 is the profile of each operation of the method for welding for representing embodiments of the present invention.
Fig. 3 is the actual measured waveform figure of soldering of the method for welding of embodiments of the present invention.
Fig. 4 is the pie graph of the high frequency electric source of the method for welding for being used in embodiments of the present invention.
Fig. 5 A are the programming rate and frequency change point overhaul flow chart of the method for welding of embodiments of the present invention.
Fig. 5 B are programming rate and frequency the change point inspection of the method for welding of the embodiments of the present invention after Fig. 5 A
Flow gauge figure.
Fig. 6 is the infrared emission temperature measurement fixed range checking position of the method for welding for representing embodiments of the present invention
The figure put.
Fig. 7 A are to represent the actual measurement data from the lower metal pipe upper end of heated object at the position 30 of+2mm
Figure.
Fig. 7 B are to represent the actual measurement data from the lower metal pipe upper end of heated object at the position 31 of+4mm
Figure.
Fig. 7 C are to represent the actual measurement data from the lower metal pipe upper end of heated object at the position 32 of+5mm
Figure.
Fig. 8 A are to represent the actual measurement data from the lower metal pipe upper end of heated object at the position 33 of -1mm
Figure.
Fig. 8 B are to represent the actual measurement data from the lower metal pipe upper end of heated object at the position 34 of -3mm
Figure.
Fig. 8 C are to represent the actual measurement data from the lower metal pipe upper end of heated object at the position 35 of -6mm
Figure.
Fig. 9 is to use the soldering in the case of Proximity Sensor to constitute in the method for welding of embodiments of the present invention
Figure.
Figure 10 A are in the case of representing and using Proximity Sensor in method for welding in embodiments of the present invention
The figure for locating when annular scolding tin is not melted.
Figure 10 B are to represent the ring used in the method for welding of embodiments of the present invention in the case of Proximity Sensor
The figure for locating when shape scolding tin is melted.
Figure 11 is the soldering pie graph of conventional example.
Specific embodiment
Hereinafter, embodiments of the present invention are explained with reference to.
In addition, such high-precision temperature control is situations below especially as problem：Despite solder and metal tube
Between the fusing point less material of difference, but soldering is carried out with the programming rate of high speed in short time.For example, the material of heated object
In material using aluminium situation with the material of heated object use other metals when compared with, the temperature range that should be controlled during soldering
It is narrower.The fusing point of aluminium is 660 DEG C, such case compared with 1083 DEG C of the fusing point of the copper used in the material of common metal pipe,
It is low very significantly.Because the fusing point of solder is 580 DEG C, so in order to carry out soldering in the case of the rupture without pipe,
Ask to the heating part of heated object by temperature control less than 660 DEG C of the narrow scope (the 1/4 of copper) more than 580 DEG C.Therefore, exist
In following embodiment, the difficult aluminium of soldering is set to the material of metal tube.
Fig. 1 is the soldering pie graph for implementing the method for welding of one embodiment of the present invention.
In Fig. 1, heated object 4 by upper metal pipe 1, lower metal pipe 2, using junction surface 4a by upper metal pipe 1
The annular scolding tin 3 engaged with lower metal pipe 2 is constituted.Junction surface 4a is that upper metal pipe 1 is engaged with lower metal pipe 2
Part, be the part of the solder of the annular scolding tin 3 of configuration.
As the brazing device of the soldering for carrying out such heated object 4, by high frequency electric source 6, controller 7, heating coil
10th, constituted as the radiation thermometer 9 and load impedance test section 8 of melting one of detection sensor.
The temperature of the measurement of the temperature measuring position 5 on the radiation detection heated object 4 of thermometer 9 is simultaneously exported to controller 7.
High frequency electric source 6 according to the control of controller 7 come to the supply high frequency electric power of heating coil 10, using heating coil 10 pairs
The junction surface 4a of heated object 4 carries out high-frequency heating to carry out soldering.
Heating coil 10 is disposed near the junction surface 4a of heated object 4, and magnetic field is produced by using RF power, from
And heated object 4 is produced vortex flow, junction surface 4a is heated using Joule heat.
Load impedance test section 8 is disposed between high frequency electric source 6 and heating coil 10, detect load impedance change and to
Controller 7 is exported.
Controller 7 according to from radiation thermometer 9 export heated object 4 on temperature measuring position 5 temperature of the measurement and
The change of the load impedance detected by the load impedance test section 8 being disposed between high frequency electric source 6 and heating coil 10 is controlled
High frequency electric source 6.Thus, specifically, the details of controller 7 as described later, at least possesses：Control unit 7k, programming rate
Maximum point test section (annular scolding tin melting test section) 7A, frequency change point test section (load impedance change point test section) 7B.
Then, in the present embodiment, based on the temperature of the measurement from the radiation output of thermometer 9, by programming rate maximum point test section 7A
To detect programming rate maximum point 19.Additionally, the change based on the load impedance detected by load impedance test section 8, by frequency
Change point test section 7B detects frequency change point 15.The information of the temperature of the measurement that control unit 7k will be exported from radiation thermometer 9
Information with the load impedance detected by load impedance test section 8 is input into respectively, and these information are respectively outputted into programming rate
Maximum point test section 7A and frequency change point test section 7B, is controlled the computing and judgement to be specified respectively.This
Outward, control unit 7k is based on as the intensification in the programming rate maximum point test section 7A of these computings and the object information of judgement
The testing result of the frequency change point 15 in the information and frequency change point test section 7B of the testing result of speed maximum point 19
Information controls high frequency electric source 6.
In addition, load impedance test section 8 is not limited to be arranged on the outside of high frequency electric source 6, it is also possible to be arranged on high-frequency electrical
The inside in source 6 is detected.Additionally, load impedance test section 8 can be using the high frequency being described in detail later in the present embodiment
The output frequency waveform of power source internal detects the change of load impedance.
Describe the brazing process of heated object 4 in detail using Fig. 2.
(a) of Fig. 2~(d) is cuing open for the 1st operation~the 4th operation of the method for welding for representing present embodiment of the invention
Face figure.
1st operation (a) of Fig. 2 is represented from high frequency electric source 6 to the supply high frequency electric power of heating coil 10, is to represent that soldering is opened
Profile during beginning with flux activity.In the operation, the temperature with heated object 4 rises, annular scolding tin 3
There is activation (for example, reaching 410 DEG C~510 DEG C of activated temperature) in the scaling powder in solder.Now, upper metal pipe 1, under
Portion's metal tube 2, annular scolding tin 3 exist with monomer respectively, at electrically aspect, in the state of substantially insulating, are in 4 operations
Load impedance highest state.In addition, in the figure of the 1st operation (a) of Fig. 2, the complete painted black of annular scolding tin 3 is shown.
Afterwards, the 2nd operation (b) of Fig. 2 is to represent solder melting and the profile during permeating.In the operation, example
Such as, in the case that the temperature in annular scolding tin 3 reaches more than fusing point i.e. 580 DEG C of annular scolding tin 3, as the ring of of solder
Shape scolding tin 3 is melted, upper metal pipe 1 and lower metal pipe 2 near the upper end 2a of lower metal pipe 2, via annular
Scolding tin 3 transmits heat, and also starts electric conducting state.In addition, in the figure of the 2nd operation (b) of Fig. 2, the annular that will be melted
The complete painted black of scolding tin 3, classifies to show the part that infiltration starts.Load impedance in 2nd operation is than the 1st operation
It is low.
Afterwards, the 3rd operation (c) of Fig. 2 is to represent the profile during solder infiltration.In the operation, the annular of melting
Scolding tin 3 penetrates into the gap between upper metal pipe 1 and lower metal pipe 2, upper metal pipe 1, lower metal pipe 2, annular welds
The heat transfer of tin 3 rises to upper metal pipe 1 and lower metal pipe 2 with temperature, conducts also excellentization, so load
The reduction of the operation of impedance ratio the 2nd.In addition, in the figure of the 3rd operation (c) of Fig. 2, the annular scolding tin 3 that will have been permeated after melting is complete
Painted black shows.
Afterwards, the 4th operation (d) of Fig. 2 is to represent the profile during soldering completion.In the operation, to annular scolding tin 3
Upper metal pipe 1 and lower metal pipe 2 between the infiltration in gap reach the lower end 1a of upper metal pipe 1, upper metal pipe 1
Most excellentization is conducted with lower metal pipe 2, load impedance turns into minimum in 4 operations.In the 4th operation (d) of Fig. 2
In figure, the complete painted black of annular scolding tin 3 that will also be permeated after melting shows.
Then, brazing process is illustrated using the actual measured waveform figure of soldering of the present embodiment of the invention of Fig. 3.
The longitudinal axis in the left side of Fig. 3 represents the temperature of the temperature measuring position 5 on the upper metal pipe 1 determined by radiation thermometer 9.It is left
The longitudinal axis of side represents the frequency detected by load impedance test section 8.Transverse axis represents minute or the load of radiation thermometer 9
The detection time of impedance detection section 8.
In figure 3,11 the 1st operation (a) equivalent to Fig. 2 during soldering starts with flux activity.Solder is melted
With during infiltration 12 equivalent to the 2nd operation (b) of Fig. 2 and the 3rd operation (c).Soldering complete during 13 equivalent to Fig. 2 the
4 operations (d).Additionally, the frequency waveform 14 of Fig. 3 is the curve map of the frequency and time detected by load impedance test section 8.Temperature
Degree waveform 16 and temperature change point 17 are in upper metal pipe 1 by radiation thermometer 9 (200 DEG C~1500 DEG C of detection temperature scope)
On the curve map of temperature and time that is measured to of temperature measuring position 5 and the temperature change point 17 on the curve map.Heat up
Velocity wave form 18, programming rate maximum point 19 and frequency change point 15 are the present invention according to Fig. 5 A described later and Fig. 5 B
Present embodiment in programming rate and frequency change point overhaul flow chart, automatically detected by controller 7.Heat up
Velocity wave form 18 is calculated based on the information of the temperature information exported by radiation thermometer 9 and the minute of radiation thermometer 9
Programming rate simultaneously forms waveform.Specifically, the difference between preceding 1 temperature information and Current Temperatures information is taken, during with determining
Between (sampling time) remove, ask for programming rate.
During the soldering of Fig. 3 starts with flux activity 11, frequency waveform 14 is from high frequency electric source 6 to heating
After the supply electric power of coil 10 during back to back rising beyond be 268.6kHz and flat waveform.Additionally, temperature waveform 16
Gradient is also fixed, and programming rate waveform 18 turns into substantially 0 and flat waveform.
During solder is melted with infiltration in 12, along with annular scolding tin 3 heat transfer to top metal tube 1 and under
Portion's metal tube 2 rises so as to temperature, and the gradient of temperature waveform 16 is programming rate such as programming rate at temperature change point 17
Waveform 18 is so changed, and maximum occurs in programming rate maximum point 19.
Afterwards, 13 during soldering is completed, upper metal pipe 1 and lower metal pipe 2 conduct most excellentization, load resistance
Resist turns into minimum in 4 operations.Now, the frequency of occurrences change point 15 in frequency waveform 14.
So, programming rate maximum point 19 is detected by controller 7, frequency change point 15 is detected by controller 7, so that
Automatically judge that soldering is completed by controller 7, will be from high frequency electric source 6 to soldering sensing heating from the control unit 7k of controller 7
The electric power of coil supply stops supply, be thus just prevented from not the melting of solder, permeate deficiency and the melting of metal tube and
Damaged such quality is bad.In addition, detection programming rate maximum point 19 means that the annular scolding tin 3 of detection there occurs melts this
One situation.Additionally, detection frequency change point 15 means the change of the load impedance of detection heated object 4.These speed that heat up
The details of the detection method of degree maximum point 19 and frequency change point 15 is aftermentioned.
Here, the phenomenon of the frequency of occurrences change point 15 in the frequency waveform 14 of Fig. 3 is described in detail.The power supply unit 20 of Fig. 4
It is the Inner Constitution of the high frequency electric source 6 of Fig. 1 with the generally constituting using the high frequency electric source used in soldering of match circuit portion 21
Figure.
The load circuit 22 being made up of heating coil 10 and heated object 4 is various because of construction, configuration, material or temperature etc.
Condition and change, so must cause to be engaged with the change of the i.e. load impedance of change of load circuit 22.If being also to take
Be loaded with accordingly makes frequency automatically change so as to change matching condition with the load impedance at every moment changing
Auto-matching (automatic matching) power supply, then also consider that the excursion of load impedance is made in advance sometimes
Into circuit that can be corresponding with the mode or the matching range of certain degree for switching over by stages.In the present embodiment,
According to possess heating coil 10, resonant capacitor, output transformer, high frequency electric detector mode constitute match circuit portion
21.According to such match circuit portion 21, can carry out accordingly making frequency automatic with the load impedance in load circuit 22
Change so as to change the Auto-matching (automatic matching) of matching condition.Filled in the soldering of present embodiment
The middle power supply for using and being equipped with such Auto-matching is put, as long as the unconverted common state of load impedance, then with heating
The impedance of coil 10 is exactly cooperatively that the change of the frequency under Auto-matching is stable to the result that frequency is carried out after Auto-matching
Ground occurs.Because load impedance changes according to the state of heated object 4 in heating, so Auto-matching function is acted as
With frequency changes.Thus, the frequency of occurrences change point 15 in the frequency waveform 14 of Fig. 3.
Additionally, here, the programming rate maximum point 19 of the Fig. 3 of narration based on controller 7 and frequency change point 15 in detail
Detection method.
Fig. 5 A and Fig. 5 B are the figures of the testing process for representing programming rate maximum point 19 and frequency change point 15.This flow
Acted by the program in the sequencer of the controller 7 of Fig. 1.
First, in step S000, operation start signal is received from the input/output port I/O of controller 7, starts fortune
Turn.That is, under the control of controller 7, from high frequency electric source 6 to soldering with the supply electric power of load coil 10.
Then, in step S001, waited until by the parameter T0 times from operation start.By the parameter T0 times
Afterwards, in step S002, also simultaneous band will be such that the analog signal from radiation thermometer 9 is obtained after carrying out AD conversion in controller 7
The noise remove of the temperature data for arriving, 10 moving averages are calculated by the 1st operational part 7a of controller 7.
Then, in step S003, in the 2nd operational part 7b of controller 7, take the difference of moving average to calculate
Programming rate.
Then, in step S004, in order to improve the moving average calculated by the 2nd operational part 7b in step S003
Difference sensitivity, by controller 7 the 3rd operational part 7c come square, this is being judged to by the 1st detection unit 7d of controller 7
In the case that square value is more than threshold parameter Tth, in step S005, calculate current by the 4th operational part 7e of controller 7
It is worth the difference with preceding 1 data.It is being judged to the situation of square value deficiency threshold parameter Tth by the 1st detection unit 7d of controller 7
Under, return to step S002.
Then, in step S006, monitored by the 2nd detection unit 7f of controller 7 in step S005 by the 4th operational part
Whether the difference value that 7e is asked for turns into less than 0 continuous 3 times.
Then, in step S007, continuous 3 times are judged to as less than 0 feelings by the 2nd detection unit 7f in step S006
Under condition, programming rate maximum point 19 is judged to by the 2nd detection unit 7f.It is judged to continuous 3 by the 2nd detection unit 7f in step S006
It is secondary more than 0 in the case of, return to step S002.
Step S002~step S007 so far is the judgement operation of programming rate maximum point 19, by the 1st operational part
7a, the 2nd operational part 7b, the 3rd operational part 7c, the 1st detection unit 7d, the 4th operational part 7e, the 2nd detection unit 7f constitute programming rate
Maximum point test section (annular scolding tin melting test section) 7A.
Then, after determined programming rate maximum point 19 by the 2nd detection unit 7f in step S007, in step S010,
Also simultaneous band will carry out temperature data obtained from AD conversion in controller 7 to the frequency analog signal from high frequency electric source 6
Noise remove, 10 moving averages are calculated by the 1st operational part 7a.
Then, in step S011, take the difference of moving average by the 2nd operational part 7b of controller 7 to calculate frequency
Change speed.
Then, in step S012, in order to improve the moving average calculated by the 2nd operational part 7b in step S011
Difference sensitivity, and by controller 7 the 3rd operational part 7c come square, be judged to by the 3rd detection unit 7g of controller 7
In the case that the square value is more than threshold parameter Fth, in step S013, is calculated by the 5th operational part 7h of controller 7 and worked as
The preceding difference being worth with preceding 1 data.In the case where square value deficiency threshold parameter Fth is judged to by the 3rd detection unit 7g, return
To step S010.
Then, in step S014, monitored by the 4th detection unit 7i of controller 7 in step S013 by the 5th operational part
Whether the difference value that 7h is asked for turns into less than 0 continuous 3 times.
Then, in step S015, continuous 3 times are judged to as less than 0 feelings by the 4th detection unit 7i in step S014
Under condition, frequency change point 15 is judged to by the 4th detection unit 7i, will be from high frequency electric source 6 to pricker from control unit 7k in step S016
The electric power that weldering load coil is supplied stops supply.It is judged to continuous 3 times to exceed by the 4th detection unit 7i in step S014
In the case of 0, step S010 is returned to.
Step S010~step S015 so far is the judgement operation of frequency change point 15, by the 1st operational part 7a,
2 operational part 7b, the 3rd operational part 7c, the 3rd detection unit 7g, the 5th operational part 7h, the 4th detection unit 7i come constitute frequency change point detection
Portion (the change point test section of load impedance) 7B.
In addition, in the present embodiment, although because the sampling time is 10ms, institute is set to 10 as moving average
It is individual, and be set to continuous 3 times in change point extraction, but it is to rely on calculation processing power, memory span, the journey of controller
Sequence capacity etc. or system are constituted, and it is these numbers or number of times to be not particularly limited.
So, programming rate maximum point 19 is detected by controller 7, frequency change point 15 is detected by controller 7, so that
Automatically judge that soldering is completed by controller 7, will be from high frequency electric source 6 to soldering sensing heating from the control unit 7k of controller 7
The electric power of coil supply automatically stops supply.But, due to the heat transfer of metal tube 1,2, the temperature measuring position in Fig. 1
5 are put, the detection of programming rate maximum point 19 is possible to be unable to catch up with the detection of frequency change point 15.Therefore, the temperature in description Fig. 1
Locate 5 the possible scope of measure.
As temperature measuring position 5, as shown in fig. 6, heated object 4 central shaft (direction of principal axis of upper metal pipe 1 or
The direction of principal axis of lower metal pipe 2) on 4b, the position of+2mm from the upper end 2b of lower metal pipe 2 is set to the position of heated object 4
30 are put, the position of+4mm is set to the position 31 of heated object 4, the position of+5mm is set to the position 32 of heated object 4.This
Outward, the position of -1mm is set to the position 33 of heated object 4, the position of -3mm is set to the position 34 of heated object 4, by -6mm
Position be set to the position 35 of heated object 4
Fig. 7 A are the figures of the actual measurement data at the position 30 of the heated object 4 for representing+2mm.Detecting the speed that heats up
After degree maximum point 19, detection frequency change point 15 can carry out the judgement of soldering completion.
Fig. 7 B are the figures of the actual measurement data at the position 31 of the heated object 4 for representing+4mm.In the same manner as Fig. 7 A,
After detecting programming rate maximum point 19, detection frequency change point 15 can carry out the judgement of soldering completion.
Fig. 7 C are the figures of the actual measurement data at the position 32 of the heated object 4 for representing+5mm.This and Fig. 7 A and figure
7B differences, the detection of programming rate maximum point 19 and the substantially identical timing of the detection of frequency change point 15, it is impossible to carry out soldering
The judgement of completion.
Additionally, Fig. 8 A are the figures of the actual measurement data at the position 33 of the heated object 4 for representing -1mm.The situation is,
After programming rate maximum point 19 is detected, detection frequency change point 15 can carry out the judgement of soldering completion.
Fig. 8 B are the figures of the actual measurement data at the position 34 of the heated object 4 for representing -3mm.In the same manner as Fig. 8 A,
After detecting programming rate maximum point 19, detection frequency change point 15 can carry out the judgement of soldering completion.
Fig. 8 C are the figures of the actual measurement data at the position 35 of the heated object 4 for representing -6mm.This and Fig. 8 A and figure
8B differences, the detection of programming rate maximum point 19 and the substantially identical timing of the detection of frequency change point 15, it is impossible to carry out soldering
The judgement of completion.
Accordingly, as the temperature measuring position 5 of heated object 4, the scope that the possibility of the temperature of heated object 4 is determined can be with
Say it is the axially below+4mm and axially downwards within -5mm upwards from the upper end 2b of lower metal pipe 2.
The melting of method for welding and annular scolding tin 3 according to involved by present embodiment uses radiation thermometer in detecting
9 composition, the absolute temperature or time management for not relying on radiation thermometer 9 can just carry out the judgement of soldering completion, by by
The electric power that the control unit 7k of controller 7 automatically to be supplied from high frequency electric source 6 to soldering load coil stops supply,
So as to the melting and breakage that obtain preventing not the melting of solder during induction brazing, permeate not enough and metal tube so
The bad effect of quality.
In addition, the present invention is not limited to the implementation method, can be implemented in other various modes.For example, in this reality
Apply in mode, the melting detection sensor of melting is there occurs as the annular scolding tin 3 of detection, describe and use radiation thermometer 9
Method, but as the other examples of melting detection sensor, it is also possible to the sensing of the change in shape for being set to detect annular scolding tin 3
Device.That is, as the annular scolding tin 3 of detection change in shape sensor, for example can also be optical reflective type, infiltration type is non-connects
Touch sensor or the image procossing based on video camera or capacitance type noncontacting proximity sensor etc..
Optical profile type non-contact sensor is subject to the shadow of the surface state of heated object 4 with the temperature rising of junction surface 4a
Ring, but having can carry out detecting such feature over long distances.Although additionally, the image procossing based on video camera is subject in solder
Flux activity when white cigarette influence, but having can carry out the visual field high and the such feature of fine detection.
In following variation, 9~Figure 10 of reference picture B describe the surface state that will be difficult to be subject to heated object 4
The capacitance type noncontacting proximity sensor of the influence of the white cigarette of influence and scaling powder is another as melting detection sensor
Example is come situation about applying.
Although annular scolding tin 3 receives the Lip river produced by the electric power supplied from high frequency electric source 6 to soldering load coil
Lun Zili influences are conditions from this case that without generation vibration, but as shown in Figure 9, it is also possible to substitution radiation thermometer 9, and
Using the contactless Proximity Sensor 40 of capacitance type annular welds are detected as another example of melting detection sensor
The melting of tin 3.
The contactless Proximity Sensor 40 of capacitance type is oppositely disposed with junction surface 4a, according to the change of electrostatic capacitance
Change the presence for carrying out detection object i.e. close to (having=ON) and leave the mode of change in location as (nothing=OFF).
As shown in Figure 10 A, in the case where annular scolding tin 3 is not melted, due to contactless closely in capacitance type
Sensor 40 locates 41 or 42, there is annular scolding tin 3, so the contactless Proximity Sensor 40 of capacitance type
It is output into ON.
Afterwards, annular scolding tin 3 is heated, as shown in Figure 10 B, melting occurs in annular scolding tin 3 and upper metal is penetrated into
In the case of the gap of pipe 1 and lower metal pipe 2, due to the measure position in the contactless Proximity Sensor 40 of capacitance type
41 or 42 are put, in the absence of annular scolding tin 3, so the contactless Proximity Sensor 40 of capacitance type is output into OFF.
Therefore, solder melt and infiltration during, the output of the contactless Proximity Sensor 40 of capacitance type from
ON changes to OFF, and afterwards, detection frequency change point 15 judges that soldering is completed, and signal is completed to the output soldering of high frequency electric source 6, from
And RF power can be stopped into supply, heated object to the supply of heating coil 10 automatically in the same manner as previous implementation method
4 soldering is completed.
Connect using capacitance type is non-in the melting detection of method for welding and annular scolding tin 3 according to what this variation was related to
The composition of touch Proximity Sensor 40, does not rely on absolute temperature or the time management of radiation thermometer 9, it becomes possible to carry out pricker
The judgement being soldered, automatically stops supply by the electric power supplied with load coil from high frequency electric source 6 to soldering, so as to
As accessing not the melting of solder when preventing induction brazing, permeating the melting and breakage of not enough and metal tube
The bad effect of quality.
In addition, possessing for implementing the brazing device of the method for welding that the implementation method is related to：To using annular scolding tin 3
The soldering load coil that the heated object 4 that upper metal pipe 1 and lower metal pipe 2 are engaged and constituted is heated
10；
To the soldering high frequency electric source 6 of the supply electric power of load coil 10；
Detect the change of the load impedance of the heated object 4 between the high frequency electric source 6 and the heated object 4
Load impedance test section 8；And
Detect the annular scolding tin 3 there occurs melting after, described being added, is detected by the load impedance test section 8
After the change of the load impedance of hot body 4, stop the electric power from the high frequency electric source 6 to soldering sensing heating line
The controller 7 (control unit 7k) of the supply of circle 10.
Also, melting in more detail, is there occurs in order to detect the annular scolding tin 3, is detected by programming rate maximum point
Portion (annular scolding tin melting test section) 7A detects programming rate maximum point 19, and in order to detect the change of the load impedance
Change, frequency change point 15 is detected by frequency change point test section (load impedance change point test section) 7B.
In such a device, it is also possible to play the action effect that the method for welding is related to.
In addition, by the way that suitably the arbitrary implementation method or variation among the various implementation methods or variation are entered
Row combination such that it is able to play the effect each having.Furthermore it is possible to carry out implementation method combination with one another or embodiment that
This combination or the combination of implementation method and embodiment, and can also carry out the spy among different implementation method or embodiments
Levy combination with one another.
Industrial Availability
The method for welding that the mode of the invention is related to is not relying on the absolute temperature of radiation thermometer or time pipe
Judge that soldering is completed in the case of reason, and the electric power supplied with load coil from high frequency electric source to soldering stopped into supply,
So as to the melting and breakage that do not melt, permeate not enough and metal tube with solder when preventing induction brazing so
The bad effect of quality, the pricker of the metal tube in the middle heat exchanger for using such as air regulator or freezer can be applied to
Weldering purposes.
Symbol description
1 upper metal pipe
1a lower ends
2 lower metal pipes
2a upper ends
2b upper ends
3 annular scolding tin
4 heated objects
4a junction surfaces
4b central shafts
5 temperature measuring positions
6 high frequency electric sources
7 controllers
7A programming rate maximum points test section (annular scolding tin melting test section)
7B frequency change points test section (load impedance change point test section)
The operational parts of 7a the 1st
The operational parts of 7b the 2nd
The operational parts of 7c the 3rd
The detection units of 7d the 1st
The operational parts of 7e the 4th
The detection units of 7f the 2nd
The detection units of 7g the 3rd
The operational parts of 7h the 5th
The detection units of 7i the 4th
7k control units
8 load impedance test sections
9 radiation thermometers
10 heating coils
During 11 solderings start with flux activity
During 12 solders are melted and permeated
During 13 solderings are completed
14 frequency waveforms
15 frequency change points
16 temperature waveforms
17 temperature change points
18 programming rate waveforms
19 programming rate maximum points
20 power supply units
21 match circuit portions
22 load circuits
30 from the lower metal pipe upper end of heated object+2mm position
31 from the lower metal pipe upper end of heated object+4mm position
32 from the lower metal pipe upper end of heated object+5mm position
33 from the lower metal pipe upper end of heated object -1mm position
34 from the lower metal pipe upper end of heated object -3mm position
35 from the lower metal pipe upper end of heated object -6mm position
The contactless Proximity Sensor of 40 capacitance types
41,42 locate
100 high-frequency heating power circuits
101 infrared emission thermometers
102 high-frequency heating temperature setting devices
103 high-frequency heating inductors
104 sequencers
105 axial length metallic conductors
106 girth metallic conductors
107 soldering places
Claims (3)
1. a kind of method for welding, using the electric power supplied with load coil from high frequency electric source to soldering come to using annular welds
Tin is heated the heated object that upper metal pipe is engaged and constituted with lower metal pipe, in the method for welding,
Detect the annular scolding tin there occurs melting after, detected by load impedance test section the high frequency electric source with it is described
The change of the load impedance of the heated object between heated object,
Then, the electric power is stopped from the high frequency electric source to the supply of the soldering load coil.
2. method for welding according to claim 1, wherein,
The annular scolding tin there occurs the change of programming rate of the detection of melting according to the heated object to detect.
3. method for welding according to claim 2, wherein,
The temperature measuring position for detecting the change of the programming rate is along the top from the upper end of the lower metal pipe
Upward below the 4mm of direction of principal axis of metal tube and from the upper end of the lower metal pipe along the axle side of the lower metal pipe
To the position within downward 5mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015226726A JP6366020B2 (en) | 2015-11-19 | 2015-11-19 | Brazing method |
| JP2015-226726 | 2015-11-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106735664A true CN106735664A (en) | 2017-05-31 |
| CN106735664B CN106735664B (en) | 2018-11-09 |
Family
ID=58803312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610842571.9A Expired - Fee Related CN106735664B (en) | 2015-11-19 | 2016-09-22 | Method for welding |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6366020B2 (en) |
| CN (1) | CN106735664B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113351952A (en) * | 2021-06-24 | 2021-09-07 | 贵州黎阳国际制造有限公司 | Butt brazing method for valvable alloy and copper |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672872B (en) * | 2018-08-02 | 2024-04-16 | 长虹美菱股份有限公司 | Inductor for high-frequency composite induction brazing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61242752A (en) * | 1985-04-04 | 1986-10-29 | ウエスチングハウス エレクトリック コ−ポレ−ション | Method and device for melting and detecting brazing element |
| JP2007294485A (en) * | 2006-04-20 | 2007-11-08 | Toyota Motor Corp | Soldering method and equipment |
| JP2010247180A (en) * | 2009-04-15 | 2010-11-04 | Mitsubishi Electric Corp | Brazing apparatus and brazing method using the same |
| JP2011025249A (en) * | 2009-07-21 | 2011-02-10 | Seidensha Electronics Co Ltd | Method and apparatus for high-frequency induction heating brazing |
| CN104002008A (en) * | 2014-05-08 | 2014-08-27 | 珠海格力电器股份有限公司 | Induction soldering device |
-
2015
- 2015-11-19 JP JP2015226726A patent/JP6366020B2/en not_active Expired - Fee Related
-
2016
- 2016-09-22 CN CN201610842571.9A patent/CN106735664B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61242752A (en) * | 1985-04-04 | 1986-10-29 | ウエスチングハウス エレクトリック コ−ポレ−ション | Method and device for melting and detecting brazing element |
| JP2007294485A (en) * | 2006-04-20 | 2007-11-08 | Toyota Motor Corp | Soldering method and equipment |
| JP2010247180A (en) * | 2009-04-15 | 2010-11-04 | Mitsubishi Electric Corp | Brazing apparatus and brazing method using the same |
| JP2011025249A (en) * | 2009-07-21 | 2011-02-10 | Seidensha Electronics Co Ltd | Method and apparatus for high-frequency induction heating brazing |
| CN104002008A (en) * | 2014-05-08 | 2014-08-27 | 珠海格力电器股份有限公司 | Induction soldering device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113351952A (en) * | 2021-06-24 | 2021-09-07 | 贵州黎阳国际制造有限公司 | Butt brazing method for valvable alloy and copper |
| CN113351952B (en) * | 2021-06-24 | 2022-08-30 | 贵州黎阳国际制造有限公司 | Butt brazing method for valvable alloy and copper |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017094346A (en) | 2017-06-01 |
| JP6366020B2 (en) | 2018-08-01 |
| CN106735664B (en) | 2018-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190299311A1 (en) | High Power Dual Sensor Cartridge | |
| CN1991654B (en) | Temperature sensor needless accurate heating-up temperature control device and method | |
| US11533782B2 (en) | Resistive heater with temperature sensing power pins | |
| US6018729A (en) | Neural network control of spot welding | |
| KR20070049188A (en) | Flow sensor | |
| CN106735664A (en) | Method for welding | |
| US10533897B2 (en) | Method and apparatus for measuring temperature within a given temperature range using a selected temperature sensor | |
| CN107409465B (en) | Method for manufacturing electronic circuit, assembly with electronic circuit and production equipment for manufacturing electronic circuit | |
| FI96454C (en) | Apparatus and method for controlling the temperature of a nozzle housing used to make fiberglass | |
| CN108377583B (en) | System and method for determining workpiece characteristics | |
| ITMI992708A1 (en) | SYSTEM AND METHOD FOR CHECKING THE TEMPERATURE OF A COLUMN FOR CHROMATOGRAPHY | |
| US9261417B2 (en) | Methods and devices for measuring the temperature of a strand-like material | |
| JP3068526B2 (en) | Heater temperature detection device for pulse heating type bonding equipment | |
| JP2018521320A (en) | Thermowell with infrared sensor | |
| JP6874979B2 (en) | Laser soldering method and laser soldering equipment | |
| CN104597177A (en) | Gas chromatography and inductively coupled plasma mass spectrometry combined electric heating hose and interface device | |
| Brydak et al. | Measuring methods of welding process parameters | |
| CN103567676A (en) | Method for measuring temperature of welding wire for laser hot wire welding | |
| US7653502B2 (en) | Data logger with pass/fail analysis | |
| US5693875A (en) | Process for measuring the temperature of metallic workpieces and their solid content in a partially solidified state | |
| RU2317184C2 (en) | Method for manufacturing wave guide-distribution systems of aluminum alloys | |
| JP6563885B2 (en) | Soldering iron temperature measurement system and soldering iron temperature measurement method | |
| CN113878880B (en) | Intelligent electric melting welding temperature control method and device | |
| JP2005118823A (en) | Spatter detection method and device in resistance welding | |
| CN206583549U (en) | A kind of temperature sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181109 Termination date: 20200922 |