CN110202264A - A kind of accuracy controlling method of titanium alloy covering-stringer siding double laser beam two-side synchronous welding microstructure - Google Patents
A kind of accuracy controlling method of titanium alloy covering-stringer siding double laser beam two-side synchronous welding microstructure Download PDFInfo
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- CN110202264A CN110202264A CN201910524104.5A CN201910524104A CN110202264A CN 110202264 A CN110202264 A CN 110202264A CN 201910524104 A CN201910524104 A CN 201910524104A CN 110202264 A CN110202264 A CN 110202264A
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- heat input
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- stringer
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- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/26—Seam welding of rectilinear seams
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/14—Titanium or alloys thereof
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to a kind of titanium alloy covering-stringer siding double laser beam two-side synchronous welding microstructure accuracy controlling methods, by carrying out the information that monitoring in real time obtains plasma optical signal to welding process, and further fed back to information processing system and judge whether heat input need to be adjusted, thus achieve the purpose that control the grain sizes of Seam and heat effected zone different zones, interdendritic away from etc..This method is identified by plasma optical signal, then establishes the matching relationship of heat input Yu Microstructure characteristics information and plasma optical signal, forms linked database.Plasma optical signal carries out real-time identification decision in the welding process, when plasma light signal strength does not meet expected require, formulates regulation scheme and heat input is adjusted.This method can obtain in real time the information of plasma optical signal, and formulate heat input regulation scheme and carry out reasonable adjustment in time, to improve the quality of double laser beam two-side synchronous welding point.
Description
Technical field
The present invention relates to technical field of laser welding, and in particular to a kind of titanium alloy covering-stringer siding double laser beam is double
The accuracy controlling method of side synchronous welding microstructure, the in particular to intelligentized control method of double laser beam two-side synchronous welding process
Technology.
Background technique
With the development of China's Aviation Industry, Flight Vehicle Structure proposes urgent demand to lightweight.Titanium alloy covering-
For stringer structure as a kind of important light structures, application range is further extensive.Double laser beam two-side synchronous welding technique is one
Novel and unique laser welding process is planted, compared with traditional T-type structure single-side welding double-side forming technique, which can
The surface integrity of effective guarantee covering, while this technology has that high production efficiency, appearance of weld effect be good, connection structure subtracts
The advantages that weight is obvious, is a kind of ideal connection technique of skin-stringer structure.
However, titanium alloy is very sensitive to welding condition, deposited during double laser beam two-side synchronous welding titanium alloy
It is unstable so as to cause weldquality, welding effect is undesirable the problems such as disturbing factor is more, quality monitoring is difficult, this restrict
Further development of the double laser beam two-side synchronous welding technique in manufacturing industry.Current double laser beam two-side synchronous welding equipment
And technique is preset welding parameter, uses changeless welding parameter in welding process, obtains a uniform weld seam, nothing
Method controls the grain sizes of Seam and heat effected zone different zones, interdendritic away from can not join according to actual situation to welding procedure
Number is regulated and controled in real time.
Summary of the invention
In view of the above problems, the present invention is intended to provide a kind of titanium alloy covering-stringer siding double laser beam bilateral
The accuracy controlling method of synchronous welding microstructure obtains plasma optical signal by carrying out monitoring in real time to welding process
Information, and further fed back to information processing system and judge whether heat input need to be adjusted, to reach control
The grain sizes of Seam and heat effected zone different zones, interdendritic away from etc. purpose.
In order to achieve the above object, a kind of titanium alloy covering provided by the invention-stringer siding double laser beam two-side synchronous
The accuracy controlling method for welding microstructure, includes the following steps:
(1) plasma light signal characteristic identifies: carrying out double laser beam two-side synchronous for titanium alloy covering-stringer siding
Welding experiment, the signal characteristic of acquisition and recording plasma optical signal in real time in welding process；
(2) plasma light signal strength determines: the threshold value S of default plasma light signal strength before weldering1And S2, synchronous
The plasma light signal strength indication S in welding process is acquired, S is worked as1≤S≤S2When, then illustrate that plasma light signal strength accords with
Expected requirement is closed, judgement does not need that heat input is adjusted, and welding process is normally carried out, as S < S1Or S > S2When, then illustrate
Plasma light signal strength does not meet expected requirement, and judgement needs that heat input is adjusted；
(3) formulate heat input regulation scheme: adjusting center receives the judgement of information processing system as a result, working as plasma
Light signal strength does not meet expected when requiring, and formulates heat input regulation scheme according to linked database；
(4) industrial personal computer configuration parameter: control centre is according to the adjusting prepared heat input regulation scheme in center to laser function
The technological parameters such as rate, speed of welding are adjusted, to achieve the purpose that the microstructure of Welded Joints carries out accuracy controlling.
Further, high-speed camera is installed respectively on the laser head of stringer two sides.
Further, Microstructure characteristics information of the present invention includes T connector melt run positions and dimensions, weldering up and down
Stitch the different zones such as heat affected area width, Weld pipe mill and heat affected area grain size and interdendritic away from.
Further, heat input regulation scheme of the present invention is not only changed overall heat input, and identical heat is defeated
With different laser power and speed of welding matching scheme under the conditions of entering, specific matching relationship is from the single change of welding parameter early period
It is extracted in the linked database that amount experimental data is formed.
Further, the method for building up of linked database of the present invention is to carry out for titanium alloy covering-stringer siding
Double laser beam two-side synchronous Welding experiment, by carrying out single adjusting to laser power or speed of welding to change in experimentation
Heat input size, collect and record the signal characteristic of plasma optical signal under different heat input regulation schemes, Welding experiment
After the completion, the Microstructure characteristics information of welding point under different process scheme is measured and recorded respectively, extracts result information symbol
Expected desired experiment numbers are closed, the plasma light signal strength in such experimentation is extracted, and is calculated
Average plasma light signal strength value S during each number experiment integral solder, in conjunction under different heat input regulation schemes
The measurement data of Welding experiment is established the matching relationship of the Microstructure characteristics information of heat input and welding point, and then is established
The matching relationship of plasma light signal strength indication S and heat input, according to grain size, interdendritic away from etc. data threshold value setting etc.
The threshold value S of gas ions light signal strength1And S2, wherein S1< S2。
The beneficial effects of the present invention are: it is directed in current double laser beam two-side synchronous welding process due to speed of welding
Fastly, the problem of microstructure progress accuracy controlling of Welded Joints is difficult to caused by disturbing factor is more, it is microcosmic by establishing
Matching relationship between tissue signature's information, heat input and plasma light signal strength three, it is defeated to heat in the welding process
Enter to be adjusted to reach accuracy controlling titanium alloy covering-stringer siding double laser beam two-side synchronous welding microstructure mesh
's.This method can obtain in real time the information of plasma optical signal, and formulate heat input regulation scheme to being unsatisfactory for default item
The case where part, is timely adjusted, and the quality of double laser beam two-side synchronous welding point is improved.
Detailed description of the invention
Fig. 1 is the accuracy controlling method flow diagram that double laser beam two-side synchronous of the present invention welds microstructure；
Fig. 2 is accuracy controlling method linked database Establishing process figure of the present invention；
Fig. 3 is that titanium alloy covering of the present invention-stringer siding double laser beam two-side synchronous welds schematic diagram.
Wherein, 1- covering, 2- stringer, 3- weld seam, 4- high-speed camera, 5- protect gas jets, 6- laser head.
Specific embodiment
Microcosmic group is welded to a kind of titanium alloy covering of the present invention-stringer siding double laser beam two-side synchronous with reference to the accompanying drawing
The accuracy controlling method knitted illustrates.
Carry out double laser beam two-side synchronous Welding experiment for the TC4 titanium alloy covering with a thickness of 1.2mm-stringer siding,
Board dimension is 500mm × 500mm.Experiment uses 12003 disc-type laser of TruDisk, and maximum power is reachable
12000W, laser one are equipped with 2 optical fiber, length 30m with one-to-two optical gate, and core diameter is divided into 1000 μm, are connected to two and swash
Flush weld connector realizes dual-beam laser welding technique.
As shown in Fig. 2, adjusting the size of heat input using laser power and speed of welding as unitary variant, carry out a series of
Soldering test collects and records the signal characteristic of plasma optical signal under different heat input regulation schemes.Welding experiment is completed
Afterwards, the Microstructure characteristics information of welding point under different process scheme is measured and recorded respectively, and extraction result information meets pre-
The experiment numbers that phase requires, extract the plasma light signal strength in such experimentation, and each volume is calculated
Average plasma light signal strength value S during number experiment integral solder, in conjunction with being welded under different heat input regulation schemes
The measurement data of experiment, establishes the matching relationship of the Microstructure characteristics information of heat input and welding point, so establish etc. from
The matching relationship of daughter light signal strength value S and heat input, according to grain size, interdendritic away from etc. data threshold value set plasma
The threshold value S of body light signal strength1And S2, wherein S1< S2, linked database is formed at this time.
As shown in Figure 1, the threshold value S of plasma light signal strength is preset before weldering in systems1And S2, same in experimentation
Plasma light signal strength indication S in step acquisition welding process, works as S1≤S≤S2When, then illustrate plasma light signal strength
It meets the expected requirements, judgement does not need that heat input is adjusted, and welding process is normally carried out；As S < S1Or S > S2When, then it says
Bright plasma light signal strength does not meet expected requirement, and judgement needs that heat input is adjusted.
Adjusting center receives the judgement of information processing system as a result, S < S1, plasma light signal strength does not meet pre-
Phase requires, and formulates heat input regulation scheme according to linked database.
Control centre adjusts laser power and speed of welding according to the prepared heat input regulation scheme in adjusting center
It is whole, change the intensity of plasma optical signal.
High-speed camera 4 is installed respectively on the laser head 6 of 2 two sides of stringer.Microstructure characteristics information of the present invention
Including the different zones such as melt run positions and dimensions, weld heat-affected zone width, Weld pipe mill and heat affected area above and below T connector
Grain size and interdendritic away from.Heat input regulation scheme of the present invention is not only changed overall heat input, identical heat
There is different laser power and speed of welding matching scheme, specific matching relationship is tested from unitary variant early period under input condition
It is extracted in the linked database that data are formed.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
It for member, can also make several improvements without departing from the principle of the present invention, these improvement also should be regarded as of the invention
Protection scope.
Claims (5)
1. a kind of titanium alloy covering-stringer siding double laser beam two-side synchronous welding microstructure accuracy controlling method, special
Sign is that the accuracy controlling method includes the following steps:
(1) plasma light signal characteristic identifies: carrying out the welding of double laser beam two-side synchronous for titanium alloy covering-stringer siding
It tests, the signal characteristic of real-time acquisition and recording plasma optical signal in welding process.
(2) plasma light signal strength determines: the threshold value S of default plasma light signal strength before weldering1And S2, synchronous acquisition
Plasma light signal strength indication S in welding process, works as S1≤S≤S2When, then it is pre- to illustrate that plasma light signal strength meets
Phase requires, and judgement does not need that heat input is adjusted, and welding process is normally carried out, as S < S1Or S > S2When, then illustrate etc. from
Daughter light signal strength does not meet expected requirement, and judgement needs that heat input is adjusted.
(3) formulate heat input regulation scheme: adjusting center receives the judgement of information processing system as a result, when plasma light is believed
Number intensity does not meet expected when requiring, and formulates heat input regulation scheme according to linked database.
(4) industrial personal computer configuration parameter: control centre is according to the adjusting prepared heat input regulation scheme in center to laser power, weldering
It connects the technological parameters such as speed to be adjusted, to achieve the purpose that the microstructure of Welded Joints carries out accuracy controlling.
2. a kind of titanium alloy covering according to claim 1-stringer siding double laser beam two-side synchronous welds microstructure
Accuracy controlling method, it is characterised in that: high-speed camera is installed respectively on the laser head of stringer two sides.
3. a kind of titanium alloy covering according to claim 1-stringer siding double laser beam two-side synchronous welds microstructure
Accuracy controlling method, it is characterised in that: the Microstructure characteristics information includes that T connector fuses line position and ruler up and down
The grain sizes of the different zones such as very little, weld heat-affected zone width, Weld pipe mill and heat affected area and interdendritic away from.
4. a kind of titanium alloy covering according to claim 1-stringer siding double laser beam two-side synchronous welds microstructure
Accuracy controlling method, it is characterised in that: the heat input regulation scheme is not only changed overall heat input, identical heat
There is different laser power and speed of welding matching scheme, specific matching relationship is single from welding parameter early period under input condition
It is extracted in the linked database that variable experimental data is formed.
5. a kind of titanium alloy covering according to claim 1-stringer siding double laser beam two-side synchronous welds microstructure
Accuracy controlling method, it is characterised in that: the method for building up of linked database be carry out for titanium alloy covering-stringer siding it is double
Laser beam two-side synchronous Welding experiment, by carrying out single adjusting to laser power or speed of welding to change in experimentation
Heat input size, collects and records the signal characteristic of plasma optical signal under different heat input regulation schemes, and Welding experiment is complete
Cheng Hou measures and records the Microstructure characteristics information of welding point under different process scheme respectively, extracts result information and meets
It is expected that desired experiment numbers, extract the plasma light signal strength in such experimentation, and it is calculated each
Average plasma light signal strength value S during number experiment integral solder, in conjunction with being welded under different heat input regulation schemes
The measurement data for connecing experiment establishes the matching relationship of the Microstructure characteristics information of heat input and welding point, and then foundation etc.
The matching relationship of gas ions light signal strength value S and heat input, according to grain size, interdendritic away from etc. data threshold value setting etc. from
The threshold value S of daughter light signal strength1And S2, wherein S1< S2。
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| CN201910524104.5A CN110202264B (en) | 2019-06-17 | 2019-06-17 | Precise regulation and control method for double-laser-beam bilateral synchronous welding microstructure of titanium alloy skin-stringer wallboard |
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| CN201910524104.5A CN110202264B (en) | 2019-06-17 | 2019-06-17 | Precise regulation and control method for double-laser-beam bilateral synchronous welding microstructure of titanium alloy skin-stringer wallboard |
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Cited By (3)
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| CN111644744A (en) * | 2020-05-20 | 2020-09-11 | 南京航空航天大学 | Multifunctional integrated welding equipment and method for double-laser-beam bilateral synchronous welding |
| CN111822855A (en) * | 2020-05-27 | 2020-10-27 | 南京航空航天大学 | Systematic regulation and control method for double-laser-beam double-side synchronous welding defect suppression of titanium alloy skin-stringer wallboard |
| CN114406465A (en) * | 2022-03-15 | 2022-04-29 | 南京航空航天大学 | Method and system for controlling welding penetration of uneven gap structure |
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