CN109382578A - A kind of friction welding quality testing assessment method - Google Patents
A kind of friction welding quality testing assessment method Download PDFInfo
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- CN109382578A CN109382578A CN201710686475.4A CN201710686475A CN109382578A CN 109382578 A CN109382578 A CN 109382578A CN 201710686475 A CN201710686475 A CN 201710686475A CN 109382578 A CN109382578 A CN 109382578A
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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Abstract
The invention discloses a kind of friction welding quality testing assessment methods, it solves the problems, such as friction welded joint performance rating, it can be according to the size and bending angle of friction welding joint overlap, realize the evaluation to friction welded joint quality, overlap pattern is more intuitive, detection mode is more simple and convenient, by the detection of this directly perceived characterization of overlap pattern, can fast and accurately evaluate the quality of welding point.Its technical solution are as follows: determine the characteristic parameter range of the overlap of characterization quality of weld joint qualification；Implement welding operation, the characteristic parameter of sample overlap after acquisition welding；The quality of welding point is evaluated according to characteristic parameter based on characteristic parameter range.
Description
Technical field
The invention belongs to welding technology fields, are related to a kind of friction welding quality testing assessment method.
Background technique
Friction welding (FW) is a kind of typical solid phase joining technique.Since welding process temperature is low, does not have metal molten phenomenon for its,
The advantages of upsetting force acts on lower contact dense structure, low stress, high intensity, low energy consumption.Aeronautics and Astronautics, automobile and
The industrial circles such as the energy are widely used.
In friction welding process, it would be possible under the action of friction pressure, upsetting force containing impurity such as oxidation films
Initial friction surface metal squeezes out frictional interface, is to avoid " greyness ", not to guarantee to form friction joint by clean metal
The welding defects such as soldering form, ensure the basis of qualified welding quality.But due to friction pressure, upsetting force and revolving speed etc.
Welding condition is complex to the influencing mechanism of friction welding joint quality, still can determine conjunction without suitable model at present
The welding condition range of lattice welding quality is all that welding quality is judged according to mechanical experimental results, is lacked to rubbing
Wipe the direct detection and analysis of quality of weld joint.
In spin friction welding and non-rotating friction welding process, typical macro morphology of the overlap as friction welding joint
(size and form including overlap) can be used to characterize the case where frictional interface plastic metal squeezes out in connector；And it rubs
Wiping oxidation film on interface and squeezing out completely, form connector by clean metal is the primary condition for obtaining qualified friction welding joint.Cause
This, friction welding joint overlap can be used to characterize the quality of friction welding joint.For welding condition, superplastic material flow,
Relationship between overlap pattern, welding quality, so far from the invention of spin friction welding technology, research worker largely grind
Study carefully work, provides foundation to judge property of welded joint, optimizing welding process etc. by observation overlap pattern.
Such as when revolving speed is too low or upsetting force is too small, the temperature of frictional interface material is low, plasticity is poor, Plastic Flow
Speed is lower, and under lower upsetting force, original oxide is difficult to be extruded and remain shape within a fitting on frictional interface
The defects of at slag inclusion, greyness, non-soldering；Under the conditions of such, since the plastic metal squeezed out in compressing process is less, thus formed
Overlap size it is smaller.And when revolving speed is excessively high or upsetting force is excessive, the temperature of frictional interface material is high, plasticity is good, material
Good fluidity, under big upsetting force, a large amount of frictional interface plastic metal is extruded, and forms the very big overlap of size；This
When due to there is excessive high-temperature material to be extruded, lead to rotate that shortening amount is excessive even more so that welding point center fails to be formed effectively
Metallurgical bonding and form the defect of non-soldering.As a result, when overlap size and bending angle, which meet a certain range, to be required,
I.e. it is believed that the material on the initial friction interface with oxide all is squeezed out, to expose clean frictional interface, tool
For the primary condition for forming acceptable splice, quality of weld joint at this time meets technological standards.
But for current spin friction quality of weld joint assessment method, to establishing spin friction quality of weld joint
Lack corresponding research in terms of relationship is between overlap pattern to form welding quality assessment method.In addition, in work before
In skill assessment method, overlap pattern is intended only as a kind of empirical auxiliary object of reference of naked-eye observation, does not form opposite system
One standard and evaluation mechanism, it would be highly desirable to perfect.
In conclusion in the prior art for friction welding process center tap performance rating the problem of, still lack effective
Solution.
Summary of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of friction welding based on overlap detection
Quality testing assessment method is realized by detection overlap size and form and is carried out quickly to spin friction plumb joint quality
And it accurately assesses.
A kind of friction welding quality testing assessment method, comprising the following steps:
(1) the characteristic parameter range of the overlap of characterization quality of weld joint qualification is determined；
Determine the lower critical characteristic parameter of overlap when all squeezing out the material on the initial friction interface with oxide,
And the upper critical characteristic parameter of frictional interface plastic metal overlap when squeezing out completely, so that it is determined that forming up-to-standard connect
The overlap characteristic parameter range of head；
(2) implement welding operation, the characteristic parameter of sample overlap after acquisition welding；
(3) the characteristic parameter range based on step (1) evaluates the matter of welding point according to the characteristic parameter of step (2)
Amount.
Further, the step of step (1) are as follows:
For welding condition: welding manner, material, size of sample determine test technology parameter, respectively to multiple samples into
Row multiple test weld after statistical results, determines under different welding conditions respectively, will be on the initial friction interface of oxide
Material when all squeezing out the lower critical characteristic parameter of overlap and frictional interface plastic metal when squeezing out completely overlap on face
Boundary's characteristic parameter, so that it is determined that forming the overlap characteristic parameter range of up-to-standard welding point.
It is further preferred that the determination step of lower critical characteristic parameter and upper critical characteristic parameter are as follows:
Using the flow behavior of frictional interface material in trace particle label friction welding process, according to the fortune of trace particle
The lower critical characteristic parameter of overlap when the determining material by the initial friction interface with oxide of dynamic rail mark all squeezes out, with
And the upper critical characteristic parameter of frictional interface plastic metal overlap when squeezing out completely.
It is further preferred that the determination step of lower critical characteristic parameter and upper critical characteristic parameter are as follows:
Using the flow behavior of frictional interface material in numerical simulation friction welding process, being determined by calculation will be with aerobic
The lower critical characteristic parameter and frictional interface plastic metal of overlap when material on the initial friction interface of compound all squeezes out
The upper critical characteristic parameter of overlap when squeezing out completely.
Further, when welding condition is welding manner, the specific steps of the step (1) are as follows:
For the different welding manners of spin friction weldering, test technology parameter is determined, multiple test weld is carried out to multiple samples,
After statistical results, determine that the lower critical of overlap when all squeezing out the material on the initial friction interface with oxide is special
The upper critical characteristic parameter of overlap when sign parameter and frictional interface plastic metal squeeze out completely, so that it is determined that forming quality
The overlap characteristic parameter range of acceptable splice；It is further preferred that using the boundary that rubs in trace particle label friction welding process
The flow behavior of plane materiel material is determined according to the motion profile of trace particle by the material on the initial friction interface with oxide
The upper critical spy of overlap when the lower critical characteristic parameter of overlap and frictional interface plastic metal squeeze out completely when all squeezing out
Parameter is levied, so that it is determined that forming the overlap characteristic parameter range of up-to-standard connector；It is further preferred that being revolved using numerical simulation
The flow behavior for turning frictional interface material in friction welding process, the initial friction interface of oxide will be had by being determined by calculation
On material overlap when all squeezing out lower critical characteristic parameter and frictional interface plastic metal overlap when squeezing out completely
Upper critical characteristic parameter, so that it is determined that forming the overlap characteristic parameter range of up-to-standard connector.
Further, when welding condition is material, the specific steps of the step (1) are as follows:
For different materials, test technology parameter is determined, multiple test weld, statistical results are carried out to multiple samples
Afterwards, the lower critical characteristic parameter of overlap when all squeezing out the material on the initial friction interface with oxide is determined, and
The upper critical characteristic parameter of overlap when frictional interface plastic metal squeezes out completely, so that it is determined that forming flying for up-to-standard connector
Side characteristic parameter range；It is further preferred that using the flowing of frictional interface material in trace particle label friction welding process
Behavior determines according to the motion profile of trace particle and flies when all squeezing out the material on the initial friction interface with oxide
The upper critical characteristic parameter of overlap when the lower critical characteristic parameter and frictional interface plastic metal on side squeeze out completely, thus
Determine the overlap characteristic parameter range for forming up-to-standard connector；It is further preferred that being welded using numerical simulation spin friction
The flow behavior of frictional interface material in the process is determined by calculation the material on the initial friction interface with oxide is complete
The upper critical characteristic of overlap when the lower critical characteristic parameter of overlap and frictional interface plastic metal squeeze out completely when portion squeezes out
Parameter, so that it is determined that forming the overlap characteristic parameter range of up-to-standard connector.
Further, when welding condition is size of sample, the specific steps of the step (1) are as follows:
For different size of sample, test technology parameter is determined, multiple test weld, statistical test knot are carried out to multiple samples
After fruit, the lower critical characteristic parameter of overlap when all squeezing out the material on the initial friction interface with oxide is determined, with
And the upper critical characteristic parameter of overlap of frictional interface plastic metal when squeezing out completely, so that it is determined that forming up-to-standard connector
Overlap characteristic parameter range；It is further preferred that using the stream of frictional interface material in trace particle label friction welding process
Dynamic behavior, when all being squeezed out according to the determining material by the initial friction interface with oxide of the motion profile of trace particle
The upper critical characteristic parameter of overlap when the lower critical characteristic parameter and frictional interface plastic metal of overlap squeeze out completely, from
And determine the overlap characteristic parameter range for forming up-to-standard connector；It is further preferred that being welded using numerical simulation spin friction
The flow behavior of frictional interface material in termination process is determined by calculation the material on the initial friction interface with oxide
The upper critical spy of overlap when the lower critical characteristic parameter of overlap and frictional interface plastic metal squeeze out completely when all squeezing out
Parameter is levied, so that it is determined that forming the overlap characteristic parameter range of up-to-standard connector.
Further, the characteristic parameter of the overlap includes the size of overlap and the bending angle of overlap.
Further, in the step (2) the step of the characteristic parameter of acquisition overlap are as follows:
After the completion of welding, using the size of sample overlap after cotton thread method measurement welding, is measured and welded using protractor
The bending angle of sample overlap afterwards.
Preferably, in the step (2) the step of the characteristic parameter of acquisition overlap are as follows:
In friction welding process, the image of sample overlap is acquired in real time using visual sensor, pass through image procossing skill
Art obtains the size and bending angle of overlap in real time.
Further, the visual sensor includes but is not limited to industrial camera, high-speed camera, linear scan laser
Instrument, camera.
Further, the specific steps of the step (3) are as follows:
Whether the characteristic parameter of comparison step (2) overlap is in the overlap characteristic parameter model to form up-to-standard welding point
It encloses, if in the overlap characteristic parameter range for forming up-to-standard welding point, the welding point matter of estimation steps (2) sample
Amount is qualified；Conversely, then the quality of weld joint of estimation steps (2) sample is unqualified.
For overcome the deficiencies in the prior art, the present invention also provides another friction welding quality testing assessment method,
The following steps are included:
(1) image of the overlap of characterization quality of weld joint qualification is determined；
Test weld is carried out to sample, obtains the image of overlap corresponding when quality of weld joint qualification；
(2) implement welding operation, acquire the image of sample overlap in friction welding process in real time；
(3) image for being handled sample overlap in real time using image processor, is matched with the image of step (1), if
It is 75% or more with rate, then the quality of weld joint of estimation steps (2) sample is qualified；Conversely, the then weldering of estimation steps (2) sample
It is unqualified to connect joint quality.
Compared with prior art, the beneficial effects of the present invention are:
Method of the invention can according to characteristic parameters such as the size of friction welding joint overlap pattern and bending angle,
Realize the evaluation to spin friction quality of weld joint, overlap pattern is more intuitive, and detection mode is more simple and convenient, by overlap
The detection of this directly perceived characterization of pattern can fast and accurately evaluate the quality of welding point.
" trial-and-error method " that method of the invention can effectively solve conventional friction Welding Process Design, optimization mainly uses,
And numerical simulation is higher in conjunction with development cost existing in the researching and designing method tested on a small quantity, the R&D cycle is longer scarce
Point, method of the invention can reduce development cost, reduce the R&D cycle.
Method of the invention after the test weld to sample, can determine that the initial friction interface of oxide will be had
On material when all squeezing out the lower critical characteristic parameter of overlap pattern and frictional interface plastic metal it is winged when squeezing out completely
The upper critical characteristic parameter of side pattern, and then determine the overlap characteristic parameter range for forming up-to-standard connector, thus subsequent
When carrying out welding procedure operation, can directly it be compared with the overlap characteristic parameter range for obtaining joint quality qualification, it is simple, fast
Speed, accurately obtain welding point whether He Ge result.
Method of the invention can carry out acquisition in real time simultaneously to overlap image in welding process by the way of acquiring image
It extracts the overlap image obtained in the characteristic parameter and test weld of overlap by image processor skill to be matched, this evaluation side
Formula without human intervention, reduces human error, and the result obtained is more accurate.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 a is the overlap shape appearance figure that fraction time 5s is obtained；
Fig. 1 b is the overlap shape appearance figure that fraction time 7s is obtained；
Fig. 1 c is the overlap shape appearance figure that fraction time 10s is obtained；
Fig. 2 is the measurement standard schematic diagram of overlap pattern；
Fig. 3 is the overlap shape appearance figure that embodiment 1 obtains；
Fig. 4 is the overlap shape appearance figure that embodiment 2 obtains.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, the problem of evaluation of spin friction quality of weld joint exists in the prior art, it is
Solution technical problem as above, present applicant proposes a kind of friction welding quality testing assessment methods, can be adapted for non-rotation
Turn friction welding and spin friction welding.
In a kind of typical embodiment of the application, a kind of friction welding quality testing assessment method is provided, is passed through
The characteristic parameters such as overlap size and bending angle are detected, carrys out Welded Joints quality and carries out procedure qualification.By to overlap
The detection of this directly perceived characterization of pattern, to achieve the purpose that Welded Joints quality carries out more quick and relatively accurate judge.
Specifically, step process of the invention are as follows:
(1) the overlap characteristic parameter range of characterization quality of weld joint qualification is determined；
For (including the Continuous Drive spin friction weldering of different non-rotating friction welding modes and spin friction weldering welding manner
With inertial rotation friction welding (FW), spin friction weldering includes axial rub weldering and radial direction friction welding again), different materials, size of sample
Welding requirement carries out multiple test weld to multiple samples, and after statistical results, the initial friction interface of oxide will be had by determining
On material overlap when all squeezing out lower critical characteristic parameter and frictional interface plastic metal overlap when squeezing out completely
Upper critical characteristic parameter, so that it is determined that forming the overlap characteristic parameter range of up-to-standard connector；
Using the flow behavior of frictional interface material in trace particle label friction welding process, according to the fortune of trace particle
The lower critical characteristic parameter of overlap when the determining material by the initial friction interface with oxide of dynamic rail mark all squeezes out, with
And the upper critical characteristic parameter of overlap of frictional interface plastic metal when squeezing out completely, so that it is determined that forming up-to-standard connector
Overlap characteristic parameter range；
Using the flow behavior of frictional interface material in numerical simulation spin friction welding process, it is determined by calculation band
The lower critical characteristic parameter and frictional interface plasticity of overlap when thering is the material on the initial friction interface of oxide all to squeeze out
The upper critical characteristic parameter of overlap when metal squeezes out completely, so that it is determined that forming the overlap characteristic parameter model of up-to-standard connector
It encloses.
Using the size of overlap and bending angle variation as the standard index of overlap pattern, to characterize joint quality conjunction
The overlap characteristic parameter range of lattice, determines the necessary condition of quality of weld joint qualification.
(2) overlap characteristic parameter is obtained；
Implement welding procedure operation by relevant parameter requirement, and obtains its overlap pattern for welding point.
Following two mode can be taken to obtain overlap pattern:
1) welding point overlap pattern can be measured by cotton thread method and protractor, obtains its overlap size and bending
Angle；
Preferred: 2) acquire overlap pattern by visual sensor (can shoot by a certain percentage welding by camera
Connector overlap pattern), and overlap characteristic parameter is extracted using image processing techniques, such as: by computer picture recognition tool
Obtain its overlap size and a kind of bending angle (mode that can be taken are as follows: picture is imported in Photoshop and is surveyed
Amount).
Visual sensor includes but is not limited to industrial camera, high-speed camera and linear scan laser, camera etc.
Detecting instrument.
(3) the overlap pattern of step (2) and step (1) is matched, obtains procedure qualification result；
Compare the overlap characteristic parameter range pair of the overlap characteristic parameter that step (2) obtain and characterization joint quality qualification
Than giving evaluation result.
It compares step (2) and extracts the characteristic parameter of overlap and the critical characteristic parameter comparison of step (1), if what is extracted flies
Side characteristic parameter is within the scope of the overlap characteristic parameter for the up-to-standard welding point of formation that step (1) obtains, then evaluates step
Suddenly the quality of weld joint of (2) sample is qualified；Conversely, then the quality of weld joint of estimation steps (2) sample is unqualified.
In the typical embodiment of the another kind of the application, a kind of spin friction Welding quality test evaluation side is provided
Method, comprising the following steps:
(1) image of the overlap of characterization quality of weld joint qualification is determined；
Test weld is carried out to sample, obtains the image of overlap corresponding when quality of weld joint qualification；
(2) implement welding operation, the image of sample overlap after acquisition welding；
(3) image for being handled sample overlap in real time using image processor, is matched with the image of step (1), if
It is 75% or more with rate, then the quality of weld joint of estimation steps (2) sample is qualified；Conversely, the then weldering of estimation steps (2) sample
It is unqualified to connect joint quality.
In order to enable those skilled in the art can clearly understand the technical solution of the application, below with reference to tool
The technical solution of the application is described in detail in the embodiment of body.
By taking the GH4196 high temperature alloy bar that Continuous Drive Friction Welding weldering welded specimen specification is diameter 10.5mm as an example, really
Surely the characteristic parameter range of the overlap of quality of weld joint qualification is characterized.In conjunction with numerical simulation result and empirical parameter optional test
Parameter be revolving speed 2200rpm, friction pressure 100MPa, upsetting force 200MPa, upset time 10s, fraction time 5s, 7s,
10s carries out soldering test, overlap pattern is obtained, respectively as shown in Fig. 1 a, 1b, 1c.With measurement standard as shown in Figure 2, determine
Connector overlap size 1.7mm-3.2mm when forming quality of weld joint qualification, 75.7 ° -89.2 ° of bending angle etc., thus
It is defined as the up-to-standard overlap characteristic parameter range of the GH4196 high temperature alloy bar friction welding of 10.5mm.
Operated as shown in example, and so on obtain the overlap feature that each conventional welding requires lower characterization joint quality qualification
Parameter area.
(2) sample overlap characteristic parameter is obtained；
Implement welding procedure operation by relevant parameter requirement, and obtains its overlap pattern for welding point.
1) welding point overlap pattern can be measured by cotton thread method and protractor, obtains its overlap size and bending
Angle；Preferred: 2) acquiring overlap pattern by visual sensor (can shoot by a certain percentage welding point by camera
Overlap pattern), and overlap characteristic parameter is extracted using image processing techniques.
Embodiment 1:
The GH4196 high temperature alloy bar for being diameter 10.5mm for Continuous Drive Friction Welding welded specimen specification, setting ginseng
Number is revolving speed 2200rpm, friction pressure 80MPa, upsetting force 200MPa, and upset time 12s, fraction time 5s are welded
Connector overlap pattern is as shown in figure 3, extract its characteristic parameter are as follows: for overlap having a size of 2.0mm, bending angle is 77.3 °.
Embodiment 2:
The GH4196 high temperature alloy bar for being diameter 10.5mm for Continuous Drive Friction Welding welded specimen specification, setting ginseng
Number is revolving speed 2200rpm, friction pressure 120MPa, upsetting force 240MPa, and upset time 10s, fraction time 6s are welded
Connector overlap pattern is as shown in figure 4, extract its characteristic parameter are as follows: for overlap having a size of 3.8mm, bending angle is 73.1 °.
(3) spin friction welding quality is evaluated according to overlap characteristic parameter；
The overlap characteristic parameter range for extracting the characteristic parameter of overlap and the formation joint quality qualification of step (1) compares,
It is formed within the scope of the overlap characteristic parameter of joint quality qualification if the overlap characteristic parameter extracted is located at, estimation steps (2)
The quality of weld joint of sample is qualified；Conversely, then the quality of weld joint of estimation steps (2) sample is unqualified.
Embodiment 1, obtaining its overlap appearance and size size is 1.7mm < 2.0mm < 3.2mm, and bending angle is 75.7 ° of <
77.3 ° 89.2 ° of <, within characteristic parameter range, then it is assumed that its quality of weld joint is excellent.
Embodiment 2, obtaining its overlap appearance and size size is 3.8mm > 3.2mm, and bending angle is 73.1 ° 77.3 ° of <,
Other than characteristic parameter range, then it is assumed that its quality of weld joint is unqualified.
The above evaluation process can also be realized by Image Acquisition, matched mode:
It is under welding quality Qualification in step (1) by acquisitions such as industrial cameras, friction welding (FW) welded specimen flies
The image on side；
Pass through the image of welding point overlap in the acquisitions such as industrial camera welding operation in step (2)；
The image of sample overlap after welding is matched with the image of step (1) using image processor in step (3),
The overlap feature image progress of overlap feature image and step (1) can will be such as obtained by SIFT algorithm in OpenCV
Match, it is on the contrary, then it is assumed that quality of weld joint is unqualified if matching rate up to thinking quality of weld joint qualification if 75% or more.
The image that embodiment 1 obtains is matched in OpenCV by SIFT algorithm, overlap pattern matching rate exists
84%, then it is assumed that its quality of weld joint is excellent.
The image that embodiment 2 obtains is matched in OpenCV by SIFT algorithm, overlap pattern matching rate exists
67%, then it is assumed that its quality of weld joint is unqualified.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of friction welding quality testing assessment method, characterized in that the following steps are included:
(1) the characteristic parameter range of the overlap of characterization quality of weld joint qualification is determined；
Determine the lower critical characteristic parameter of overlap when all squeezing out the material on the initial friction interface with oxide, and
The upper critical characteristic parameter of overlap when frictional interface plastic metal squeezes out completely, so that it is determined that forming up-to-standard welding point
Overlap characteristic parameter range；
(2) implement welding operation, the characteristic parameter of sample overlap after acquisition welding；
(3) the characteristic parameter range based on step (1) evaluates the quality of welding point according to the characteristic parameter of step (2).
2. assessment method as described in claim 1, characterized in that the step of step (1) are as follows:
For welding condition: welding manner, material, size of sample determine test technology parameter, carry out respectively to multiple samples more
Secondary test weld after statistical results, determines under different welding conditions respectively, by the material on the initial friction interface with oxide
The upper critical spy of overlap when the lower critical characteristic parameter of overlap and frictional interface plastic metal squeeze out completely when material all squeezes out
Parameter is levied, so that it is determined that forming the overlap characteristic parameter range of up-to-standard welding point.
3. assessment method as claimed in claim 2, characterized in that the determination of lower critical characteristic parameter and upper critical characteristic parameter
Step are as follows:
Using the flow behavior of frictional interface material in trace particle label friction welding process, according to the movement rail of trace particle
The lower critical characteristic parameter of overlap when the determining material by the initial friction interface with oxide of mark all squeezes out, and rub
Wipe the upper critical characteristic parameter of overlap when interface plastic metal squeezes out completely.
4. assessment method as claimed in claim 2, characterized in that the determination of lower critical characteristic parameter and upper critical characteristic parameter
Step are as follows:
Using the flow behavior of frictional interface material in numerical simulation friction welding process, being determined by calculation will be with oxide
Initial friction interface on material all squeeze out when overlap lower critical characteristic parameter and frictional interface plastic metal it is complete
The upper critical characteristic parameter of overlap when extrusion.
5. assessment method as described in claim 1, characterized in that the characteristic parameter of the overlap includes the size of overlap and flies
The bending angle on side.
6. assessment method as described in claim 1, characterized in that the step of the characteristic parameter of acquisition overlap in the step (2)
Suddenly are as follows:
After the completion of welding, using the size of sample overlap after cotton thread method measurement welding, tried after being welded using protractor measurement
The bending angle of sample overlap.
7. assessment method as described in claim 1, characterized in that the step of the characteristic parameter of acquisition overlap in the step (2)
Suddenly are as follows:
In friction welding process, the image of sample overlap is acquired in real time using visual sensor, pass through image processing techniques reality
When obtain overlap size and bending angle.
8. assessment method as claimed in claim 7, characterized in that the visual sensor includes but is not limited to industry camera shooting
Machine, high-speed camera, linear scan laser, camera.
9. assessment method as described in claim 1, characterized in that the specific steps of the step (3) are as follows:
Whether the characteristic parameter of comparison step (2) overlap is in the overlap characteristic parameter range to form up-to-standard welding point,
If in the overlap characteristic parameter range for forming up-to-standard welding point, the quality of weld joint of estimation steps (2) sample
It is qualified；Conversely, then the quality of weld joint of estimation steps (2) sample is unqualified.
10. a kind of friction welding quality testing assessment method, characterized in that the following steps are included:
(1) image of the overlap of characterization quality of weld joint qualification is determined；
Test weld is carried out to sample, obtains the image of overlap corresponding when quality of weld joint qualification；
(2) implement welding operation, acquire the image of sample overlap in friction welding process in real time；
(3) image for being handled sample overlap in real time using image processor, is matched with the image of step (1), if matching rate
It is 75% or more, then the quality of weld joint of estimation steps (2) sample is qualified；Conversely, then the welding of estimation steps (2) sample connects
It is off quality.
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| CN117226245A (en) * | 2023-11-14 | 2023-12-15 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for improving heat input of linear friction welding interface |
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| CN117226245B (en) * | 2023-11-14 | 2024-02-02 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for improving heat input of linear friction welding interface |
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| CN109382578B (en) | 2021-03-16 |
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