CN110307801A - A kind of out-of-roundness detection method of big diameter elbow nozzle - Google Patents
A kind of out-of-roundness detection method of big diameter elbow nozzle Download PDFInfo
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- CN110307801A CN110307801A CN201910496726.1A CN201910496726A CN110307801A CN 110307801 A CN110307801 A CN 110307801A CN 201910496726 A CN201910496726 A CN 201910496726A CN 110307801 A CN110307801 A CN 110307801A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2408—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring roundness
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72406—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by software upgrading or downloading
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- Length Measuring Devices By Optical Means (AREA)
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Abstract
The invention belongs to the out-of-roundness detection technique fields of big diameter elbow nozzle, specifically disclose a kind of out-of-roundness detection method of big diameter elbow nozzle: Step 1: bend pipe nozzle image is taken pictures；Step 2: the pretreatment of bend pipe nozzle image；Step 3: the calculating of bend pipe nozzle maximum diameter and minimum diameter；Step 4: the calculating of bend pipe nozzle out-of-roundness；Step 5: the acquisition that campus is suggested.The out-of-roundness detection method of this big diameter elbow nozzle；The detection efficiency of the out-of-roundness to bend pipe nozzle is substantially increased, while improving the convenience of the detection of out-of-roundness to bend pipe nozzle, reduces the employment quantity of the out-of-roundness detection of bend pipe nozzle, improves the accuracy of the out-of-roundness detection to bend pipe nozzle；It provides that bend pipe nozzle is rolled sired results sequence and specifically rolls round number and refer to simultaneously and rolls round numerical value, reduce and round number is rolled to bend pipe nozzle.
Description
Technical field
The present invention relates to the out-of-roundness detection technique field of big diameter elbow nozzle more particularly to a kind of big diameter elbow pipes
The out-of-roundness detection method of mouth.
Background technique
In the pipeline engineering of the industries such as petroleum, chemical industry, natural gas transportation, metallurgy, nuclear power station and heat supply, exist a large amount of
The Pipeline butts such as straight tube, bend pipe connect work, nozzle is non-round to significantly reduce welding quality, seriously affect conveyance conduit use
Service life.Domestic and international long-time statistical the result shows that: the failure rate of bend pipe is apparently higher than straight tube, is on the one hand due to metal material, curved
There are problems for plumber's skill, such as: heavy caliber steel hot-bending bends in process of production, are made since nozzle is clamped with its internal stress
With, can make nozzle occur lose circle phenomenon, cause the nozzle circularity of bend pipe unqualified.On the other hand then with conduit running environment and pipe
Road stress state is related.Since the presence of initial out-of-roundness generates additional bending stress, pipeline is caused to answer under internal pressure effect
Power it is uneven, have larger impact to the theoretical service life of bend pipe.Calculation shows that in factors such as internal pressure, heat expansion, outer load moment of flexure, the temperature difference
Under the action of, the circumferential stress of bend pipe rises with the increase of out-of-roundness, when circumferential stress meets or exceeds a certain limit value, pipe
Road creep failure process caused by the deformation of creep on cross-sectional periphery direction will accelerate.In addition the nozzle circularity of bend pipe is direct
Influence counterpart, the welding of subsequent semi-finished product retaining wall on slope and finished product pipeline.Therefore bend pipe out-of-roundness is to examine bending quality
An important indicator, according to national standards specification regulation: bend pipe out-of-roundness refers on the same circular section in tube bending part most
Major diameter and the ratio between the difference of minimum diameter and nominal diameter, bend pipe out-of-roundness are the items having to check for when bend pipe manufacture, installation
Mesh, so bend pipe needs to carry out nozzle circularity calibration process after bending, it is ensured that it is not more than prescribed limits.
" school circle " is required processing step in hot-bending bends production process in the prior art, at present the bend pipe of this type
School circle production technology, in terms of it is also very immature.Under normal circumstances, domestic that circularity is lost to big diameter elbow nozzle
Calibration method mostly use more original method greatly such as: jack is put into internal wall of pipe orifice edge, with manual operation top pressure
Mode carry out school circle, nozzle out-of-roundness detection method is very simple and crude, mainly using measuring scale mensuration, needs from nozzle
Circumferential direction take different measurement points, not only production efficiency is low, and testing result there was only qualitative concept and without quantitative conclusion,
Product quality not can guarantee.Using the circularity mode of this school corner bevelling pipe nozzle, not only large labor intensity, working efficiency are low, but also
Since detection means falls behind, to directly result in that production efficiency is low, process is tedious complicated, energy consumption is high, human cost is high, Product Precision
Low outstanding problem.Inventor has developed a kind of out-of-roundness detection side of big diameter elbow nozzle based on defect in the prior art
Method can well solve problems of the prior art.
Summary of the invention
The purpose of the present invention is to solve above-mentioned problems of the prior art, provide a kind of big diameter elbow pipe
The out-of-roundness detection method of mouth, the invention is easy to operate, scientific and reasonable, easy to use, intelligent automaticization degree is high；The invention
APP client third party application based on mobile phone is directed at large caliber pipe mouth by the camera of mobile phone and takes pictures, by APP visitor
Round shot region on the interface of family end is directed at large caliber pipe mouth, and the picture of shooting carries out gray processing processing and extracts nozzle profile
After mathematical model, the calculating of nozzle maximum diameter and minimum diameter is carried out, while saving image, then will be schemed using wireless network
The digital information transmission of piece is to the database on server, by the database processing on server, in cell phone application client circle
Maximum gauge, minimum diameter, out-of-roundness, system detection judgement result and the school circle advisory information of bend pipe nozzle are shown on face.
The present invention provides a kind of out-of-roundness detection method of big diameter elbow nozzle:
Step 1: bend pipe nozzle image is taken pictures: cell phone application client end interface is opened, by the camera alignment pipe road junction of mobile phone,
Shown pipeline opening in camera is allowed to drop into cell phone application client end interface circle picture shooting alignment area, click is taken pictures
Key fixes shooting；If the picture of bend pipe nozzle is not shot, camera button again can be clicked, repetition is above-mentioned to take pictures movement i.e.
It can；
Step 2: the pretreatment of bend pipe nozzle image: will fix in step 1 after having shot picture, operator presses mobile phone
Reading picture on APP client end interface simultaneously runs program key, using cell phone network by picture digital information transmission to server
On image processing module, image processing module will be with the colorful one bend pipe nozzle picture gray proces, noise reduction process and two-value
Change processing, extracts the edge image of bend pipe nozzle；
Step 3: the calculating of bend pipe nozzle maximum diameter and minimum diameter: according to the bend pipe pipe for carrying out gray proces in step 2
Distance of the edge of mouth picture in coordinate, the maximum gauge of bend pipe nozzle is calculated by the image processing module on server
And minimum diameter；The maximum gauge on cell phone application client end interface is aobvious respectively for the maximum diameter and minimum diameter of bend pipe nozzle
Show in frame and minimum diameter display box and shows specific numerical value；
Step 4: the calculating of bend pipe nozzle out-of-roundness: according to the maximum diameter and minimum diameter of the bend pipe nozzle in step 3
Specific value calculates the coefficient value of out-of-roundness K, the coefficient value of out-of-roundness K is in cell phone application visitor using out-of-roundness calculation formula
Specific out-of-roundness coefficient value is directly displayed out in out-of-roundness display box on the interface of family end；It is straight according to the maximum of bend pipe nozzle simultaneously
Diameter can determine the maximum diameter region of bend pipe nozzle；
Step 5: campus suggest acquisition: by Step 3: in step 4 to the maximum gauge of bend pipe nozzle, minimum diameter and
The numerical value of out-of-roundness COEFFICIENT K is input in the Circle Parameters aided design system of nozzle school, is calculated and is obtained using school circle expert database
Judge that testing result and school circle are suggested, and detection judgment result displays frame and school circle suggestion on cell phone application client end interface
Show that specific school circle is suggested in display box.
Wherein in step 1, the permission of the calling camera under mobile phone is first obtained, while obtaining file management permission, facilitates bat
Take the save location after photo；Then it calls camera to take pictures, after taking pictures successfully, cuts out circle by cutting out circle algorithm, save
To defining in file.
Wherein in step 2, after carrying out gray proces to bend pipe nozzle picture using the image processing module on server,
By image processing module to bend pipe nozzle picture carry out noise processed, while by the bend pipe nozzle picture Jing Guo noise reduction process into
Bend pipe nozzle picture is become the bianry image of only black and white colors by row binary conversion treatment.
Wherein in step 3, the extraction of pixel is carried out to the image handled well in step 2, by each of its pixel
A coordinate is stored in a matrix；All data are traversed with the method for exhaustion, per the numerical value for obtaining a maximum gauge two-by-two,
The maximum gauge value of circle contour is obtained with this；The minimum value of that being stored in the same matrix, is exactly minimum diameter.
Wherein in step 4, out-of-roundness calculation formula are as follows: K=[(Dmax-Dmin)/D] * 100 %；Wherein K is non-round
Spend coefficient；Dmax is the maximum gauge of bend pipe nozzle；Dmin is the minimum diameter of bend pipe nozzle；D is nominal diameter.
Wherein in step 5, influence factor level when processing is justified such as in school Circle Parameters aided design system combination school: environment
The parameters such as temperature, wall thickness input nozzle out-of-roundness, most to the nozzle school Circle Parameters aided design system based on expert database
Automatically the nozzle school circle technological parameter that recommendation is exported after the parameters such as large-diameter region, passes through cell phone application interface display.
Wherein in step 5, school circle expert database passes through the influence factor of analysis nozzle school circle machining deformation amount, in conjunction with
School sired results skill big data, finds the regular influence relationship between each influence factor and technological parameter and nozzle distortion amount, builds
Vertical school circle expert database, and database information is imported in the circle system of auxiliary school.
Wherein in step 5, bend pipe nozzle that school circle expert database is inputted according to school Circle Parameters aided design system
The numerical value of maximum gauge, minimum diameter and out-of-roundness COEFFICIENT K；School circle expert database meter is utilized in combination with school circle technological parameter
Calculating judges that testing result and school circle are suggested.
Wherein in step 1, bend pipe nozzle image is taken pictures: cell phone application client end interface is opened, by the camera of mobile phone
Alignment pipe road junction allows shown pipeline opening in camera to drop into cell phone application client end interface circle picture shooting alignment area
In, it clicks camera button and fixes shooting；If the picture of bend pipe nozzle is not shot, camera button again can be clicked, in repetition
State movement of taking pictures；The main purpose done so is in order on the one hand avoid in reflective environment locating for bend pipe nozzle, to curved
The influence of pipe nozzle picture shooting quality；It on the other hand can be to the bend pipe for the poor quality that takes pictures by the setting of camera button again
Nozzle picture, is re-shoot, so as to improve the shooting quality of bend pipe nozzle picture.
Wherein in step 2, it will fix in step 1 after having shot picture, operator presses cell phone application client end interface
On reading picture and run program key, using cell phone network by picture digital information transmission to the image procossing mould on server
Block, image processing module will extract bend pipe with the colorful one bend pipe nozzle picture gray proces, noise reduction process and binary conversion treatment
The edge image of nozzle；The main purpose done so is by bend pipe nozzle picture gray proces, noise reduction process and binaryzation
Processing reduces the edge image disturbing factor that bend pipe nozzle is extracted by image processing module.Because in bend pipe nozzle image taking
During, it unavoidably will receive the influence of the factor of environment, so we will pre-process image, image divided
Analysis, processing and processing make it meet the technical requirements that image processing module extracts bend pipe nozzle image pixel.
Wherein in step 3, the extraction of pixel is carried out to the image handled well in step 2, by each of its pixel
A coordinate is stored in a matrix；All data are traversed with the method for exhaustion, per the numerical value for obtaining a maximum gauge two-by-two,
The maximum gauge value of circle contour is obtained with this；The minimum value of that being stored in the same matrix, is exactly minimum diameter；This
The main purpose that sample is done is pixel all data of method of exhaustion traversal in order to pass through image processing module according to bend pipe nozzle,
To finally calculate the maximum diameter and minimum diameter of bend pipe nozzle picture.
Wherein in step 4, according to the specific value of the maximum diameter and minimum diameter of the bend pipe nozzle in step 3, benefit
With out-of-roundness calculation formula, out-of-roundness calculation formula are as follows: K=[(Dmax-Dmin)/D] * 100 %；Calculate out-of-roundness K's
Coefficient value, the coefficient value of out-of-roundness K directly display out specific non-round in the out-of-roundness display box on cell phone application client end interface
Spend coefficient value；The maximum diameter region of bend pipe nozzle can be determined according to the maximum gauge of bend pipe nozzle simultaneously；The master done so
Syllabus is out-of-roundness calculation formula by being modeled in image processing module, calculates the out-of-roundness COEFFICIENT K of bend pipe nozzle,
The circularity of its smaller bend pipe nozzle of out-of-roundness COEFFICIENT K is round, and the circularity of its bigger bend pipe nozzle of out-of-roundness COEFFICIENT K is more non-round, needs
It carries out rolling circle.
Wherein in step 5, by Step 3: to the maximum gauge, minimum diameter and out-of-roundness of bend pipe nozzle in step 4
The numerical value of COEFFICIENT K is input in the Circle Parameters aided design system of nozzle school, is calculated using school circle expert database and is obtained judgement inspection
It surveys result and school circle is suggested, and detection judgment result displays frame and school circle suggestion display box on cell phone application client end interface
The middle specific school circle of display is suggested；The main purpose done so is to accurately obtain the campus suggestion to bend pipe nozzle.
There are two important roles for cell phone application client in the present invention: on the one hand utilizing cell phone application client circle
Face circle picture shooting alignment area clicks camera button and again the bend pipe nozzle image of camera button acquisition high quality；On the other hand
As transmission image and receive the carrier of image, send images to server, allows the image procossing disposed on the server
Resume module image, and it is presented to the user the Intelligent treatment program of result after processing image.
Beneficial effects of the present invention: the present invention provides a kind of out-of-roundness detection method of big diameter elbow nozzle, the hairs
Bright easy to operate, scientific and reasonable, easy to use, intelligent automaticization degree height；Substantially increase the out-of-roundness to bend pipe nozzle
Detection efficiency, while improving the convenience of the detection of out-of-roundness to bend pipe nozzle, reduce the out-of-roundness of bend pipe nozzle
The employment quantity of detection improves the accuracy of the out-of-roundness detection to bend pipe nozzle；It provides simultaneously and sired results is rolled to bend pipe nozzle
Sequence specifically rolls round number and with reference to round numerical value is rolled, and reduces and rolls round number to bend pipe nozzle.
Detailed description of the invention
Fig. 1 is that cell phone application client of the present invention is taken pictures schematic diagram of interface display；
Fig. 2 is cell phone application client process result interface display schematic diagram of the present invention；
Fig. 3 is that the present invention is based on cell phone application clients to bend pipe nozzle school circle flow chart；
Marked in the figure: 1, cell phone application client end interface, 2, camera button, 3, camera button again, 4, read in picture and run program
Key, 5, exit the program key, 6, picture shooting alignment area, 7, maximum gauge display box, 8, minimum diameter display box, 9, out-of-roundness it is aobvious
Show frame, 10, detection judgment result displays frame, 11, school circle suggestion display box.
Specific embodiment
The present invention is described further below in conjunction with specific embodiment, the present invention provides a kind of big diameter elbow nozzles
Out-of-roundness detection method:
Step 1: bend pipe nozzle image is taken pictures: cell phone application client end interface 1 is opened, by the camera align with tube of mobile phone
Mouthful, it allows shown pipeline opening in camera to drop into cell phone application client end interface circle picture shooting alignment area 4, clicks
Camera button 2 fixes shooting；If the picture of bend pipe nozzle is not shot, camera button 3 again can be clicked, repeat above-mentioned take pictures
Movement；
Step 2: the pretreatment of bend pipe nozzle image: will fix in step 1 after having shot picture, operator presses mobile phone
Reading picture on APP client end interface 1 simultaneously runs program key 2, using cell phone network by picture digital information transmission to service
Image processing module on device, image processing module will be with the colorful one bend pipe nozzle picture gray proces, noise reduction process and two
Value processing, extracts the edge image of bend pipe nozzle；
Step 3: the calculating of bend pipe nozzle maximum diameter and minimum diameter: according to the bend pipe pipe for carrying out gray proces in step 2
Distance of the edge of mouth picture in coordinate, the maximum gauge of bend pipe nozzle is calculated by the image processing module on server
And minimum diameter；The maximum gauge on cell phone application client end interface 1 is aobvious respectively for the maximum diameter and minimum diameter of bend pipe nozzle
Show in frame 5 and minimum diameter display box 6 and shows specific numerical value；
Step 4: the calculating of bend pipe nozzle out-of-roundness: according to the maximum diameter and minimum diameter of the bend pipe nozzle in step 3
Specific value calculates the coefficient value of out-of-roundness K, the coefficient value of out-of-roundness K is in cell phone application visitor using out-of-roundness calculation formula
Specific out-of-roundness coefficient value is directly displayed out in out-of-roundness display box 7 on family end interface 1；Simultaneously according to the maximum of bend pipe nozzle
Diameter can determine the maximum diameter region of bend pipe nozzle；
Step 5: campus suggest acquisition: by Step 3: in step 4 to the maximum gauge of bend pipe nozzle, minimum diameter and
The numerical value of out-of-roundness COEFFICIENT K is input in the Circle Parameters aided design system of nozzle school, is calculated and is obtained using school circle expert database
Judge that testing result and school circle are suggested, and detection judgment result displays frame 10 on cell phone application client end interface 1 and school circle are built
Show that specific school circle is suggested in view display box 11.
Wherein in step 1, the permission of the calling camera under mobile phone is first obtained, while obtaining file management permission, facilitates bat
Take the save location after photo；Then it calls camera to take pictures, after taking pictures successfully, cuts out circle by cutting out circle algorithm, save
To defining in file.
Wherein in step 2, after carrying out gray proces to bend pipe nozzle picture using the image processing module on server,
By image processing module to bend pipe nozzle picture carry out noise processed, while by the bend pipe nozzle picture Jing Guo noise reduction process into
Bend pipe nozzle picture is become the bianry image of only black and white colors by row binary conversion treatment.
Wherein in step 3, the extraction of pixel is carried out to the image handled well in step 2, by each of its pixel
A coordinate is stored in a matrix；All data are traversed with the method for exhaustion, per the numerical value for obtaining a maximum gauge two-by-two,
The maximum gauge value of circle contour is obtained with this；The minimum value of that being stored in the same matrix, is exactly minimum diameter.
Wherein in step 4, out-of-roundness calculation formula are as follows: K=[(Dmax-Dmin)/D] * 100 %；Wherein K is non-round
Spend coefficient；Dmax is the maximum gauge of bend pipe nozzle；Dmin is the minimum diameter of bend pipe nozzle；D is nominal diameter.
Wherein in step 5, influence factor level when processing is justified such as in school Circle Parameters aided design system combination school: environment
The parameters such as temperature, wall thickness input nozzle out-of-roundness, most to the nozzle school Circle Parameters aided design system based on expert database
Automatically the nozzle school circle technological parameter that recommendation is exported after the parameters such as large-diameter region, passes through cell phone application interface display.
Wherein in step 5, school circle expert database passes through the influence factor of analysis nozzle school circle machining deformation amount, in conjunction with
School sired results skill big data, finds the regular influence relationship between each influence factor and technological parameter and nozzle distortion amount, builds
Vertical school circle expert database, and database information is imported in the circle system of auxiliary school.
Wherein in step 5, bend pipe nozzle that school circle expert database is inputted according to school Circle Parameters aided design system
The numerical value of maximum gauge, minimum diameter and out-of-roundness COEFFICIENT K；School circle expert database meter is utilized in combination with school circle technological parameter
Calculating judges that testing result and school circle are suggested.
Technical solution of the present invention is not limited in above-mentioned range, and described above is only preferable implementation of the invention
Example, the conventional modification or equivalent replacement that all those skilled in the art are made as described above, belongs to protection model of the invention
It encloses.The technology contents of the not detailed description of the present invention are well-known technique.
Claims (6)
1. a kind of out-of-roundness detection method of big diameter elbow nozzle: it is characterized by: Step 1: the bat of bend pipe nozzle image
According to: cell phone application client end interface is opened, by the camera alignment pipe road junction of mobile phone, shown pipeline opening in camera is allowed to fall
Enter into cell phone application client end interface circle picture shooting alignment area, clicks camera button and fix shooting；If the figure of bend pipe nozzle
Piece is not shot, and can click camera button again, repeats above-mentioned movement of taking pictures；Step 2: bend pipe nozzle image is pre-
Processing: it will fix in step 1 after having shot picture, operator presses the reading picture on cell phone application client end interface and transports
Line program key, using cell phone network by picture digital information transmission to the image processing module on server, image processing module
The edge image of bend pipe nozzle will be extracted with the colorful one bend pipe nozzle picture gray proces, noise reduction process and binary conversion treatment；
Step 3: the calculating of bend pipe nozzle maximum diameter and minimum diameter: according to the bend pipe nozzle figure for carrying out gray proces in step 2
Distance of the edge of piece in coordinate calculates the maximum gauge and most of bend pipe nozzle by the image processing module on server
Minor diameter；The maximum diameter and minimum diameter of the bend pipe nozzle maximum gauge display box on cell phone application client end interface respectively
With specific numerical value is shown in minimum diameter display box；Step 4: the calculating of bend pipe nozzle out-of-roundness: according to curved in step 3
The specific value of the maximum diameter and minimum diameter of pipe nozzle calculates the coefficient of out-of-roundness K using out-of-roundness calculation formula
Value, the coefficient value of out-of-roundness K directly display out specific out-of-roundness system in the out-of-roundness display box on cell phone application client end interface
Numerical value；The maximum diameter region of bend pipe nozzle can be determined according to the maximum gauge of bend pipe nozzle simultaneously；
Step 5: campus suggest acquisition: by Step 3: in step 4 to the maximum gauge of bend pipe nozzle, minimum diameter and
The numerical value of out-of-roundness COEFFICIENT K is input in the Circle Parameters aided design system of nozzle school, is calculated and is obtained using school circle expert database
Judge that testing result and school circle are suggested, and detection judgment result displays frame and school circle suggestion on cell phone application client end interface
Show that specific school circle is suggested in display box.
2. a kind of out-of-roundness detection method of big diameter elbow nozzle according to claim 1, it is characterised in that: wherein walk
In rapid one, the permission of the calling camera under mobile phone is first obtained, while obtaining file management permission, the guarantor after conveniently capturing a photograph
Deposit position；Then it calls camera to take pictures, after taking pictures successfully, cuts out circle by cutting out circle algorithm, be saved in and define file
It is interior.
3. a kind of out-of-roundness detection method of big diameter elbow nozzle according to claim 1, it is characterised in that: wherein walk
In rapid two, after carrying out gray proces to bend pipe nozzle picture using the image processing module on server, pass through image procossing mould
Block carries out noise processed to bend pipe nozzle picture, while the bend pipe nozzle picture Jing Guo noise reduction process is carried out binary conversion treatment,
Bend pipe nozzle picture is become to the bianry image of only black and white colors.
4. a kind of out-of-roundness detection method of big diameter elbow nozzle according to claim 1, it is characterised in that: wherein walk
In rapid three, the extraction of pixel is carried out to the image handled well in step 2, each coordinate of its pixel is stored in
In one matrix；All data are traversed with the method for exhaustion, per the numerical value for obtaining a maximum gauge two-by-two, circle contour is obtained with this
Maximum gauge value；The minimum value of that being stored in the same matrix, is exactly minimum diameter.
5. a kind of out-of-roundness detection method of big diameter elbow nozzle according to claim 1, it is characterised in that: wherein walk
In rapid four, out-of-roundness calculation formula are as follows: K=[(Dmax-Dmin)/D] * 100 %；Wherein K is out-of-roundness coefficient；Dmax is
The maximum gauge of bend pipe nozzle；Dmin is the minimum diameter of bend pipe nozzle；D is nominal diameter.
6. a kind of out-of-roundness detection method of big diameter elbow nozzle according to claim 1, it is characterised in that: school circle ginseng
Justify influence factor level when processing such as in several aided design system combination schools: environment temperature, wall thickness parameter, to based on expert's number
According to the nozzle school Circle Parameters aided design system in library, output is pushed away automatically after the parameters such as input nozzle out-of-roundness, maximum diameter region
The nozzle school circle technological parameter recommended, passes through cell phone application interface display.
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| CN201910496726.1A CN110307801B (en) | 2019-06-10 | 2019-06-10 | Method for detecting out-of-roundness of large-diameter elbow pipe opening |
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| CN201910496726.1A CN110307801B (en) | 2019-06-10 | 2019-06-10 | Method for detecting out-of-roundness of large-diameter elbow pipe opening |
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| CN110307801B CN110307801B (en) | 2020-12-01 |
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| CN110307801B (en) | 2020-12-01 |
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Application publication date: 20191008 Assignee: Luoyang wheel Technology Development Co.,Ltd. Assignor: LUOYANG INSTITUTE OF SCIENCE AND TECHNOLOGY Contract record no.: X2023980031952 Denomination of invention: A method for measuring the out-of-roundness of the large diameter elbow nozzle Granted publication date: 20201201 License type: Common License Record date: 20230209 |