CN107438327A - A kind of plasma electrical signal online measurement apparatus and method - Google Patents
A kind of plasma electrical signal online measurement apparatus and method Download PDFInfo
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- CN107438327A CN107438327A CN201710725971.6A CN201710725971A CN107438327A CN 107438327 A CN107438327 A CN 107438327A CN 201710725971 A CN201710725971 A CN 201710725971A CN 107438327 A CN107438327 A CN 107438327A
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- insulation board
- workpiece
- plasma
- accessory plate
- electrical signal
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/0006—Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature
- H05H1/0081—Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature by electric means
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention belongs to laser welding correlative technology field, and it discloses a kind of plasma electrical signal online measurement apparatus, and it includes oscillograph, shunt resistance, insulation board and accessory plate, and the insulation board includes the first insulation board and the second insulation board that relative spacing is set；First insulation board is used to carry workpiece to be welded, and the accessory plate is arranged on second insulation board, and it is arranged at intervals with workpiece to be welded；The accessory plate and the workpiece is electrically connected in the both ends of the shunt resistance；The oscillograph is parallel to the opposite both ends of the shunt resistance；Plasma is bridged workpiece to be welded and the accessory plate in welding process, now the oscillograph real-time online record and display plasma electric signal.The invention further relates to the plasma electric signal measurement method based on said apparatus.The present invention instrument higher without required precision, oscillograph not to be affected by temperature away from weld seam, and measurement range is larger.
Description
Technical field
The invention belongs to laser welding correlative technology field, is surveyed more particularly, to a kind of plasma electrical signal online
Measure device and method.
Background technology
Welding technique is one of manufacturing process mostly important in modern equipment manufacturing industry, and laser welding technology therein
With its energy density high concentration, heat affected area is small, welding stress and distortion is small, automaticity is high, efficiency high the advantages that by
Extensive concern is arrived.Meanwhile plasma be in laser beam welding in high energy laser beam and mother metal low-melting alloy element and
Caused by interaction between protective gas.Laser plasma includes the bulk information of laser beam welding, therefore right
The research of laser plasma has great significance.
With strong characteristic signal in the generation of plasma and maintenance process, and embodied by signals such as sound, electricity, light
Out.The methods of main sound, electric, light of the detection method to laser plasma and spectrum for more commonly using at present, wherein compared with
To common are acoustical signal processing method, optical signal detecting method, microwave detection method and probe inspection method etc., such as patent
CN201110360537.5 discloses a kind of photoelectricity probe and its application method for detecting laser plasma, and this method will be passive
Electrical resistivity survey needle method and light probe method are combined and detected, and for example patent CN201310513676.6 disclose a kind of laser etc. from
The passive electric detection device and method of daughter, improve electric probe shape；Patent CN201510664238.9 discloses a kind of sharp
Flush weld aperture plasma electric properties detection means and method, realize special to aperture plasma electricity under Laser Deep Penetration Welding pattern
The detection of property.But required precision of the light signal collection to measuring instrument is very high, while above-mentioned three kinds of methods are due to test position
Near weld seam, temperature is higher, is not used to the measurement of myriawatt level optical-fiber laser welding process plasma electric signal.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of survey of plasma electrical signal online
Device and method is measured, the characteristics of it be based on existing plasma signal measuring method, studies and devises one kind and be applied to myriawatt
The plasma electrical signal online measurement apparatus and method of level optical-fiber laser welding.The plasma electrical signal online measurement dress
High-precision measurement can be completed by the arrangement between oscillograph, shunt resistance, insulation board and accessory plate and cooperation by putting, without
The higher instrument of required precision, cost is relatively low, simple in construction, application easy to spread.In addition, oscillograph and workpiece to be welded point
Not Wei Yu the opposite both sides of insulation board, oscillograph be used for real-time online measuring and display plasma electric signal, measure electric signal
Be located away from weld seam so that being not affected by high temperatures, expand measurement range.
To achieve the above object, according to one aspect of the present invention, there is provided a kind of plasma electrical signal online measurement
Device, it is welded suitable for myriawatt level optical-fiber laser, it is characterised in that：
The plasma electrical signal online measurement apparatus includes oscillograph, shunt resistance, insulation board and accessory plate, described
Insulation board includes the first insulation board and the second insulation board that relative spacing is set, and first insulation board and second insulation
Plate is horizontally disposed；First insulation board is used to carry workpiece to be welded, and the accessory plate is arranged on second insulation
On plate, it is arranged at intervals with workpiece to be welded；One end of the shunt resistance is electrically connected at the accessory plate, and the other end is used
In the electric connection workpiece；The oscillograph is parallel to the opposite both ends of the shunt resistance, and itself and workpiece to be welded divide
Wei Yu not the opposite both sides of the insulation board；Plasma is carried out workpiece to be welded and the accessory plate in welding process
Bridge, now the oscillograph real-time online record and display plasma electric signal.
Further, the material with workpiece to be welded, thickness are consistent respectively for the material of the accessory plate, thickness.
Further, between first insulation board and second insulation board at intervals of 0.5mm~1.2mm.
Further, the resistance of the shunt resistance is the Ω of 8 Ω~12.
Further, the insulation board is using made of high temperature ceramic material.
Further, the thickness of first insulation board is identical with the thickness of second insulation board.
It is another aspect of this invention to provide that providing a kind of plasma electrical signal online measuring method, this method includes
Following steps：
(1) plasma electrical signal online measurement apparatus as described above is provided, the insulation board is arranged on workbench
On, and by workpiece setting on the first insulation board, the workpiece is set with the accessory plate relative spacing；
(2) other end and the workpiece are electrically connected with；
(3) parameter of the oscillograph is set, and welded after selecting the parameter of optical fiber laser, while is blown to molten bath
Protective gas is sent, the oscillograph records and shown in real time the plasma electric signal in welding process.
Further, the gap between the workpiece and the insulation board is 0.85mm.
Further, the tie point between the workpiece and the shunt resistance and the accessory plate and the shunt resistance
Between tie point between line parallel to weld seam, and the spacing between the line and weld seam is 0.5mm.
Further, the flow of the protective gas is 10L/min, and it is any of nitrogen, helium and argon gas.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it is provided by the invention etc.
Gas ions electrical signal online measurement apparatus and method mainly have the advantages that：
1. the plasma electrical signal online measurement apparatus by oscillograph, shunt resistance, insulation board and accessory plate it
Between arrangement and cooperation can complete high-precision measurement, the instrument higher without required precision, cost is relatively low, simple in construction,
Application easy to spread；
2. oscillograph and workpiece to be welded are used for real-time online measuring positioned at the opposite both sides of insulation board, oscillograph respectively
And display plasma electric signal, measure electric signal is located away from weld seam so that being not affected by high temperatures, and expands measurement range；
3. the plasma electrical signal online measurement apparatus is welded suitable for myriawatt level optical-fiber laser, flexibility is higher,
The scope of application is wider.
Brief description of the drawings
Fig. 1 be the plasma electrical signal online measurement apparatus that provides of better embodiment of the present invention using when state show
It is intended to；
Fig. 2 is that the voltage for the shunt resistance for using the plasma electrical signal online measurement apparatus in Fig. 1 to measure shows
It is intended to.
In all of the figs, identical reference is used for representing identical element or structure, wherein：1- oscillographs, 2-
The low currents such as shunt resistance, 3- wires, 4- insulation boards, 5- workpiece, 6- weldpools, 7- plasmas, 8- keyholes, 9-, 10- auxiliary
Plate.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
Refer to Fig. 1 and Fig. 2, the plasma electrical signal online measurement apparatus that better embodiment of the present invention provides, institute
Stating plasma electrical signal online measurement apparatus includes oscillograph 1, shunt resistance 2, insulation board 4 and accessory plate 10, the shunting
One end of resistance 2 is electrically connected with the accessory plate 10, and the other end is used to be electrically connected with workpiece 5 to be welded.The oscillography
The both ends of device 1 are electrically connected with the both ends of the shunt resistance 2 respectively, i.e., described oscillograph 1 is in parallel with the shunt resistance 2.
The oscillograph 1 is used for the electric signal of shunt resistance 1 described in real-time display.In present embodiment, the shunt resistance 2 with it is described
Between workpiece 5 and between the shunt resistance 2 and the accessory plate 10 it is connected by wire 3；The workpiece 5 with it is described
Tie point between shunt resistance 2 is parallel with the line between the tie point between the accessory plate 10 and the shunt resistance 2
In weld seam；The resistance of the shunt resistance 2 is the Ω of 8 Ω~12；The oscillograph 1 is located at the insulation respectively with the workpiece 5
The opposite both sides of plate 4.
The insulation board 4 is set on the table, and it is used to ensure the workpiece 5 and workbench insulation and the accessory plate
10 with the workbench insulate and it is not short-circuit.The insulation board 4 includes the first insulation board and the second insulation board, first insulation
Plate is arranged at intervals with second insulation board, and both of which is horizontally disposed with.In present embodiment, first insulation board is used to hold
The workpiece 5 is carried, second insulation board is used to carry the accessory plate 10, the thickness of first insulation board and described second
The thickness of insulation board is identical；Between first insulation board and second insulation board at intervals of 0.5mm~1.2mm；It is described
Insulation board 4 is made of exotic material, it is preferred to use high temperature ceramic material is made.
The accessory plate 10 is arranged on second insulation board, its material, material, the thickness of thickness and the workpiece 5
It is consistent.Plasma 7 formed in welding process moves with the movement of laser beam so that the plasma 7 exists
Gap location between the accessory plate 10 and the workpiece 5 bridges with the accessory plate 10, now the workpiece 5, the auxiliary
Plate 10 and the shunt resistance 2 form loop, you can measure the plasma by measuring the electric signal of the shunt resistance 2
The electric signal of body.
Present invention also offers plasma electrical signal online measuring method, the plasma electrical signal online measuring method
Comprise the following steps：
Step 1, there is provided plasma electrical signal online measurement apparatus as described above, the insulation board 4 is arranged on institute
State on workbench, and workpiece 5 is arranged on first insulation board, the workpiece 5 is arranged at intervals with the accessory plate 10.This
Embodiment selects optical-fiber laser soldering apparatus, and laser parameter is power 3KW, speed of welding 5m/min；Welding process uses
Helium is protective gas, and He throughputs are 10L/min, and workpiece material selects AlMgSi1, thickness of workpiece 4mm；The material of accessory plate 10
Material selects AlMgSi1, and thickness selects 4mm, and the resistance of shunt resistance is 10 Ω；The insulation board 4 selects high-temperature insulation glass,
Thickness is 4mm；Gap between the workpiece 5 and the insulation board 10 is 0.85mm.
Step 2, by the shunt resistance 2 one end opposite with the one end for being connected to the accessory plate 10 and the workpiece 5
It is electrically connected with.In present embodiment, tie point and the accessory plate 10 and institute between the workpiece 5 and the shunt resistance 2
The line between the tie point between shunt resistance 2 is stated parallel to weld seam, and the spacing between the line and weld seam is
0.5mm。
Step 3, sets the parameter of the oscillograph 1, and is welded after selecting optical fiber laser parameter, while to molten
Pond 6 blows protective gas, and the oscillograph 1 records and shown in real time the plasma electric signal in welding process.This embodiment party
In formula, the protective gas is any of nitrogen, helium and argon gas.
From Figure 2 it can be seen that having equivalent current 9 and plasma 7 in welding process, welding process is divided into four-stage,
First stage is with a certain distance from keyhole 8 has from the gap between the accessory plate 10 and the workpiece 5, now the plasma
Body 7 does not bridge the accessory plate 10 and the workpiece 5, electric signal 0；With the movement of weld seam, the plasma 7 is by described in
Accessory plate 10 and the workpiece 5 are bridged, and are now critical condition, and generate electric signal into second stage；3rd rank
Section is the near gaps that laser beam is moved between the workpiece 5 and the accessory plate 10, the now workpiece 5 and the auxiliary
Minor insulation, electric signal disappear plate 10 again；The last stage is that the keyhole 8 is moved on the accessory plate 10, now described
Workpiece 5 and the accessory plate 10 southbridge, but the side of the equivalent current 9 of the direction of equivalent current 9 now and second stage again
To on the contrary, therefore the reverse electric signal of output.
Plasma electrical signal online measurement apparatus and method provided by the invention, the plasma electrical signal online are surveyed
Amount device can complete high-precision measurement by the arrangement between oscillograph, shunt resistance, insulation board and accessory plate and cooperation,
The instrument higher without required precision, cost is relatively low, simple in construction, application easy to spread.In addition, oscillograph and work to be welded
For part respectively positioned at the opposite both sides of insulation board, oscillograph is used for real-time online measuring and display plasma electric signal, measurement electricity
Signal is located away from weld seam so that being not affected by high temperatures, and expands measurement range.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (10)
1. a kind of plasma electrical signal online measurement apparatus, it is welded suitable for myriawatt level optical-fiber laser, it is characterised in that：
The plasma electrical signal online measurement apparatus includes oscillograph, shunt resistance, insulation board and accessory plate, the insulation
Plate includes the first insulation board and the second insulation board that relative spacing is set, and first insulation board and second insulation board are equal
It is horizontally disposed；First insulation board is used to carry workpiece to be welded, and the accessory plate is arranged on second insulation board,
It is arranged at intervals with workpiece to be welded；One end of the shunt resistance is electrically connected at the accessory plate, and the other end is used for electricity
Property the connection workpiece；The oscillograph is parallel to the opposite both ends of the shunt resistance, and it distinguishes position with workpiece to be welded
In the both sides that the insulation board is opposite；Workpiece to be welded and the accessory plate are carried out bridge by plasma in welding process
Connect, now the oscillograph real-time online record and display plasma electric signal.
2. plasma electrical signal online measurement apparatus as claimed in claim 1, it is characterised in that：The material of the accessory plate
Material, the material with workpiece to be welded, thickness are consistent respectively for thickness.
3. plasma electrical signal online measurement apparatus as claimed in claim 1, it is characterised in that：First insulation board with
Between second insulation board at intervals of 0.5mm~1.2mm.
4. plasma electrical signal online measurement apparatus as claimed in claim 1, it is characterised in that：The resistance of the shunt resistance
It is worth for the Ω of 8 Ω~12.
5. the plasma electrical signal online measurement apparatus as described in claim any one of 1-4, it is characterised in that：The insulation
Plate is using made of high temperature ceramic material.
6. the plasma electrical signal online measurement apparatus as described in claim any one of 1-4, it is characterised in that：Described first
The thickness of insulation board is identical with the thickness of second insulation board.
7. a kind of plasma On-line Measuring Method, it is characterised in that this method comprises the following steps：
(1) the plasma electrical signal online measurement apparatus as described in claim any one of 1-6 is provided, the insulation board is set
Put on the table, and by workpiece setting on the first insulation board, the workpiece is set with the accessory plate relative spacing；
(2) other end and the workpiece are electrically connected with；
(3) parameter of the oscillograph is set, and welded after selecting the parameter of optical fiber laser, while guarantor is blowed to molten bath
Gas is protected, the oscillograph records and shown in real time the plasma electric signal in welding process.
8. plasma On-line Measuring Method as claimed in claim 7, it is characterised in that：The workpiece and the insulation board it
Between gap be 0.85mm.
9. plasma On-line Measuring Method as claimed in claim 7 or 8, it is characterised in that：The workpiece and the shunting
The line between the tie point between tie point and the accessory plate and the shunt resistance between resistance parallel to weld seam, and
Spacing between the line and weld seam is 0.5mm.
10. plasma On-line Measuring Method as claimed in claim 7 or 8, it is characterised in that：The flow of the protective gas
For 10L/min, and it is any of nitrogen, helium and argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710725971.6A CN107438327A (en) | 2017-08-22 | 2017-08-22 | A kind of plasma electrical signal online measurement apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710725971.6A CN107438327A (en) | 2017-08-22 | 2017-08-22 | A kind of plasma electrical signal online measurement apparatus and method |
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| CN107438327A true CN107438327A (en) | 2017-12-05 |
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| CN201710725971.6A Pending CN107438327A (en) | 2017-08-22 | 2017-08-22 | A kind of plasma electrical signal online measurement apparatus and method |
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|---|---|---|---|---|
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| JPS58212874A (en) * | 1982-04-26 | 1983-12-10 | ゼネラル・エレクトリツク・カンパニイ | Method of tracking seam of arc torch welding |
| EP0473287A1 (en) * | 1990-08-09 | 1992-03-04 | Cmb Foodcan Plc | Apparatus and method for monitoring laser material processing |
| CN101639456A (en) * | 2008-07-28 | 2010-02-03 | 宝山钢铁股份有限公司 | Method and device for testing thermal circulation parameters of laser welding |
| CN201455508U (en) * | 2009-05-27 | 2010-05-12 | 北京工业大学 | Device for measuring arc pressure distribution and current density distribution |
| CN102615423A (en) * | 2012-04-25 | 2012-08-01 | 湖南大学 | Method for diagnosing galvanized steel laser powder addition welding defects on line based on characteristic spectrum |
| CN103528703A (en) * | 2013-10-25 | 2014-01-22 | 天津大学 | Passive electric detection device and method for laser plasma |
| CN105228327A (en) * | 2015-10-14 | 2016-01-06 | 天津大学 | Laser Welding aperture plasma electric properties checkout gear and method |
| CN106695103A (en) * | 2016-12-23 | 2017-05-24 | 南京理工大学 | Real-time monitoring detecting device for electron beam deep penetration welding and penetration forming |
| CN106799532A (en) * | 2017-02-15 | 2017-06-06 | 天津大学 | A kind of electric arc arc root current density distribution tester and method of testing |
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2017
- 2017-08-22 CN CN201710725971.6A patent/CN107438327A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3712736A (en) * | 1971-01-05 | 1973-01-23 | Commissariat Energie Atomique | Method and device for testing welds by optical spectrography |
| JPS58212874A (en) * | 1982-04-26 | 1983-12-10 | ゼネラル・エレクトリツク・カンパニイ | Method of tracking seam of arc torch welding |
| EP0473287A1 (en) * | 1990-08-09 | 1992-03-04 | Cmb Foodcan Plc | Apparatus and method for monitoring laser material processing |
| CN101639456A (en) * | 2008-07-28 | 2010-02-03 | 宝山钢铁股份有限公司 | Method and device for testing thermal circulation parameters of laser welding |
| CN201455508U (en) * | 2009-05-27 | 2010-05-12 | 北京工业大学 | Device for measuring arc pressure distribution and current density distribution |
| CN102615423A (en) * | 2012-04-25 | 2012-08-01 | 湖南大学 | Method for diagnosing galvanized steel laser powder addition welding defects on line based on characteristic spectrum |
| CN103528703A (en) * | 2013-10-25 | 2014-01-22 | 天津大学 | Passive electric detection device and method for laser plasma |
| CN105228327A (en) * | 2015-10-14 | 2016-01-06 | 天津大学 | Laser Welding aperture plasma electric properties checkout gear and method |
| CN106695103A (en) * | 2016-12-23 | 2017-05-24 | 南京理工大学 | Real-time monitoring detecting device for electron beam deep penetration welding and penetration forming |
| CN106799532A (en) * | 2017-02-15 | 2017-06-06 | 天津大学 | A kind of electric arc arc root current density distribution tester and method of testing |
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Application publication date: 20171205 |