CN110245439A - A kind of installation error modeling and compensation method being flared conduit - Google Patents
A kind of installation error modeling and compensation method being flared conduit Download PDFInfo
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Abstract
The invention discloses a kind of installation error modelings and compensation method for being flared conduit, specifically includes the following steps: step S1: the space polar coordinate system of flaring conduit connection composition error: step S2: according to space polar coordinate system, calculating structural failure and conduit error in conduit installation process: step S3: calculating composition error expression formula: step S4 according to error principle of stacking: measuring range error at conduit installation point and angular error；Step S5: measurement conduit parameter obtains catheter end head angle error value α and range error value Δ ρ2；Step S6: handling measurement data, determines that error parameter scatterplot is distributed bandwidth.The beneficial effects of the present invention are: invention substantially reduces flaring conduit installation composition error, the stress eliminated in installation process concentrates situation, greatly promote conduit installation quality and efficiency, it was demonstrated that flaring conduit installation modeling and compensation method proposed by the present invention have preferable reliability and exploitativeness.
Description
Technical field
The present invention relates to Automatic manual transmissions and maintenance technology field, are that a kind of installation error of flaring conduit is built specifically
Mould and compensation method.
Background technique
Flaring conduit is one of main application catheter in aircraft conduit both at home and abroad at present, from aero-engine to fuselage liquid
The key positions such as pressure, environmental control system are largely flared conduit skill from the point of view of flaring conduit development both at home and abroad using flaring conduit
Art will continue to develop and apply.How to reduce flaring conduit leakage, promote flaring conduit installation quality, it has also become major aviation enterprise
The Important Problems of industry concern.
Flaring conduit rigging error is the key reason for causing to be flared conduit quality problems, and rigging error is excessive to will lead to pipe
Connector stress is concentrated, and installation quality and airtight effect are influenced.At present both at home and abroad to stress analysis and expansion after flaring conduit installation
Mouth duct forming technology has more research.Cheng little Yong, Wei Junchao et al. are by taking hydraulic pipe as an example, to flaring conduit leakage and failure
Reason is analyzed, and proposes the suggestion of optimization catheter design state, but the suggestion can not eliminate conduit assembling stage error
Bring adverse effect.Zhang Zongyu et al. proposes a kind of flaring conduit to conduit assemble welding based on numeric terminal angle
Installation error modeling and compensation method active compensation method, but its application field is conduit welding forming stage, the mistake established
Differential mode type is unable to satisfy the demand of assembling stage only for conduit foozle.In terms of rigging error compensation, conventional method is
Three shaft space coordinate systems are established, error model is constructed by the geometric error parameter of each coordinate system and are compensated, the method
To solving the problems, such as that conduit rigging error has certain reference, but coordinate system conversion difficulty is faced when handling conduit rigging error
Greatly, the problems such as conduit foozle parameter is unable to measure.
Summary of the invention
The purpose of the present invention is to provide a kind of installation error modelings and compensation method for being flared conduit, overcome and utilize biography
The defects of bad adaptability, parameter are unable to measure, are computationally intensive when bulk cargo is installed with Error Module Analysis conduit, greatly reduces mistake
The sum and parameter of poor parameter calculate and the difficulty of statistics.The error compensating method based on data probability is proposed simultaneously, significantly
Improve conduit installation quality.
The present invention is achieved through the following technical solutions:
A kind of installation error modeling and compensation method being flared conduit, it is characterised in that: specifically includes the following steps:
Step S1: the space polar coordinate system of flaring conduit connection composition error:
Step S2: according to space polar coordinate system, structural failure and conduit error in conduit installation process are calculated:
Step S3: composition error expression formula is calculated according to error principle of stacking:
Step S4: range error at conduit installation point and angular error are measured；
Step S5: measurement conduit parameter obtains catheter end head angle error value α and range error value Δ ρ2；
Step S6: handling measurement data, determines that error parameter scatterplot is distributed bandwidth.
The present invention is by establishing conduit rigging error model, statistical measurement error parameter, the side for adjusting conduit molding parameter
Method compensates rigging error, achievees the purpose that meet matching requirements.
Further, in order to preferably realize the present invention, the space polar coordinate system in the step S1 includes:
Theoretical space polar coordinate systemWherein ρ indicates coordinate point is to initial point distance, and θ is indicated and Z axis angle,Table
Show and X-axis angle；
Structure real space polar coordinate systemWherein ρ1Indicates coordinate point is to initial point distance, θ1Expression and Z1Axle clamp
Angle,Expression and X1Axle clamp angle；
Conduit real space polar coordinate systemWherein ρ2Indicates coordinate point is to initial point distance, θ2Expression and Z2Axis
Angle,Expression and X2Axle clamp angle.
Further, in order to preferably realize the present invention, the structural failure in the step S2 is Δ1, conduit error is
Δ2；
Wherein:
Δ1For structural failure, Δ ρ1、Δθ1、It respectively indicates Standard space polar coordinate system and theoretical space pole is sat
Mark system between, with initial point distance error, with Z axis angle error, with X-axis angle error；
Δ2For conduit error, Δ ρ2、Δθ2、It respectively indicates catheter space polar coordinate system and Standard space pole is sat
Between mark, with initial point distance error, with Z axis angle error, with X-axis angle error.
Further, in order to preferably realize the present invention, the composition error in the step S3 is Δ:
Wherein:
Δ ρ, Δ α are that conduit installs final composition error.
Further, in order to preferably realize the present invention, the step S4 is specifically referred to: choosing 4 holes respectively as ginseng
Examination point, the location error and Calculation Plane angular error and location error for measuring reference point；Specifically includes the following steps:
Step S41: 1-4 point reference point the most is chosen, 1-4 point actual error value (Δ x is measuredi, Δ yi, Δ
zi), wherein i indicates 1-4 point serial number；
Step S42: the Δ z difference of 2, No. 3 points and 1, No. 4 point is calculated separately out, is calculated directly using space geometry
Line 23, straight line 14 and plane included angle Δ α23With Δ α14；
Step S43: the Δ z difference of 1, No. 2 point and 3, No. 4 points is calculated separately out, is calculated directly using space geometry
Line 12, straight line 34 and plane included angle Δ α12With Δ α34；
Step S44: plane is gone out along X-axis rotation angle Δ θ according to calculated angle calcu-lation in 2, No. 3 points34It is rotated with Y-axis
Angle ΔΦ34；
Step S45: according to 1-4 point and installation point distance and 1-4 point Δ z value, installation point distance is calculated accidentally
Poor Δ ρ1。
Further, in order to preferably realize the present invention, the step S5 is specifically referred to: choosing 2 in conduit straightway
Measurement position obtains conduit axis curve by fitting using the space coordinate in the measuring machine measurement conduit position annulus center of circle,
Axis curve and theoretical curve are compared, catheter end head angle error value α and range error value Δ ρ are obtained2。
Further, in order to preferably realize the present invention, the step S6 is specifically referred to: to the measurement result in step S5
Statistics, the scatter plot of rendering error parameter, point of observation bit distribution situation reject the point to differ greatly with mainstream distributed areas,
And determine that error parameter scatterplot is distributed bandwidth.
It further, further include step S7: error compensation application in order to preferably realize the present invention；It specifically includes following
Step:
Step S71: according to the measurement statistical result of error parameter, calculating the error parameter average value after screening, with
This is as structure and conduit error parameter.
Step S72: bringing structure and conduit error parameter into step S2, calculates when composition error is 0, conduit needs to mend
The error amount repaid；
Step S73: front and back error amount difference is compensated according to conduit, adjusts conduit theory point in CNC tube bending machine.
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
The present invention substantially reduces flaring conduit installation composition error, eliminates the stress in installation process and concentrates situation, significantly
Promote conduit installation quality and efficiency, it was demonstrated that flaring conduit installation modeling and compensation method proposed by the present invention, which have, preferably may be used
By property and exploitativeness.
Detailed description of the invention
Fig. 1 is conduit installation error geometrical model in the present invention；
Fig. 2 is the point schematic diagram of step S4 in the present invention；
Fig. 3 is the schematic diagram of step S5 of the present invention；
Fig. 4 is the comparison diagram of practical axis and theoretical axis in the present invention.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment 1:
The present invention is achieved through the following technical solutions, as Figure 1-Figure 4, it is a kind of be flared conduit installation error modeling and
Compensation method, it is characterised in that: specifically includes the following steps:
Step S1: the space polar coordinate system of flaring conduit connection composition error: the space polar coordinate system in the step S1
Include:
The space polar coordinate that theorizes systemWherein ρ indicates coordinate point is to initial point distance, and θ is indicated and Z axis angle,It indicates and X-axis angle；
Establish structure real space polar coordinate systemWherein ρ1Indicates coordinate point is to initial point distance, θ1Expression and Z1
Axle clamp angle,Expression and X1Axle clamp angle；
Establish conduit real space polar coordinate systemWherein ρ2Indicates coordinate point is to initial point distance, θ2Indicate with
Z2Axle clamp angle,Expression and X2Axle clamp angle；
Step S2: according to space polar coordinate system, structural failure and conduit error in conduit installation process: the step are calculated
Structural failure in rapid S2 is Δ1, conduit error is Δ2；
Wherein:
Δ1For structural failure, Δ ρ1、Δθ1、It respectively indicates Standard space polar coordinate system and theoretical space pole is sat
Mark system between, with initial point distance error, with Z axis angle error, with X-axis angle error；
Δ2For conduit error, Δ ρ2、Δθ2、It respectively indicates catheter space polar coordinate system and Standard space pole is sat
Between mark, with initial point distance error, with Z axis angle error, with X-axis angle error.
Step S3: calculate composition error expression formula according to error principle of stacking: the composition error in the step S3 is Δ:
Wherein:
Δ ρ, Δ α are that conduit installs final composition error.
Step S4: range error at conduit installation point and angular error are measured；As shown in Fig. 2, the step S4 is specific
Refer to: choose 4 holes respectively as reference point, measure the location error of reference point and Calculation Plane angular error and position are missed
Difference；Specifically includes the following steps:
Step S41: 1-4 point reference point the most is chosen, 1-4 point actual error value (Δ x is measuredi, Δ yi, Δ
zi), wherein i indicates 1-4 point serial number；
Step S42: the Δ z difference of 2, No. 3 points and 1, No. 4 point is calculated separately out, is calculated directly using space geometry
Line 23, straight line 14 and plane included angle Δ α23With Δ α14；
Step S43: the Δ z difference of 1, No. 2 point and 3, No. 4 points is calculated separately out, is calculated directly using space geometry
Line 12, straight line 34 and plane included angle Δ α12With Δ α34；
Step S44: plane is gone out along X-axis rotation angle Δ θ according to calculated angle calcu-lation in 2, No. 3 points34It is rotated with Y-axis
Angle ΔΦ34；
Step S45: according to 1-4 point and installation point distance and 1-4 point Δ z value, installation point distance is calculated accidentally
Poor Δ ρ1。
Step S5: measurement conduit parameter obtains catheter end head angle error value α and range error value Δ ρ2, catheter end head
Angle error value α includes Δ θ2WithAs shown in figure 3, the step S5 is specifically referred to: choosing 2 measurements in conduit straightway
Position, 2 measurement positions are specifically the position A-G in Fig. 3, utilize the annulus center of circle of the measuring machine measurement position conduit A-H
Space coordinate, conduit axis curve is obtained by fitting, compares axis curve and theoretical curve, obtains catheter end head angle mistake
Difference α and range error value Δ ρ2.Catheter end head angle error value α includes Δ θ2With
Step S6: handling measurement data, determines that error parameter scatterplot is distributed bandwidth.The step S6 is specifically
Refer to: the measurement result in step S5 being counted, the scatter plot of rendering error parameter, point of observation bit distribution situation, rejecting and mainstream
The point that distributed areas differ greatly, and determine that error parameter scatterplot is distributed bandwidth.Wherein statistical result is as follows:
It further include step S7: error compensation application；Specifically includes the following steps:
Step S71: according to the measurement statistical result of error parameter, calculating the error parameter average value after screening, with
This is as structure and conduit error parameter.
Step S72: bringing structure and conduit error parameter into step S2, calculates when composition error is 0, conduit needs to mend
The error amount repaid；
Step S73: front and back error amount difference is compensated according to conduit, adjusts conduit theory point in CNC tube bending machine.
The present invention is by establishing conduit rigging error model, statistical measurement error parameter, the side for adjusting conduit molding parameter
Method compensates rigging error, achievees the purpose that meet matching requirements.
By correcting parameters of bent pipe, numerical controlled bending of pipe theory point is adjusted, by bend pipe length ρ2Increase 0.7mm and bending angle
θ2Reduce 0.2 °, bending angleReduce 1.51 °, composition error can be controlled in preferable range, as shown in the table:
It can be seen that according to the application result of this example by adjusting process allowance, amendment numerical control on catheter length direction
Conduit theory point in bending machine program can control conduit error parameter:
Δρ2=-0.4 ± 0.3mm, Δ θ2=-0.07 ± 0.15 °,
The method adjustment compensation proposed through the invention can substantially reduce flaring conduit installation composition error, eliminate installation
Stress in the process concentrates situation, greatly promotes conduit installation quality and efficiency, it was demonstrated that flaring conduit installation proposed by the present invention
Modeling and compensation method have preferable reliability and exploitativeness.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit any simple modification to the above embodiments of the invention, equivalent variations, protection of the invention is each fallen within
Within the scope of.
Claims (8)
1. a kind of installation error modeling and compensation method for being flared conduit, it is characterised in that: specifically includes the following steps:
Step S1: the space polar coordinate system of flaring conduit connection composition error:
Step S2: according to space polar coordinate system, structural failure and conduit error in conduit installation process are calculated:
Step S3: composition error expression formula is calculated according to error principle of stacking:
Step S4: range error at conduit installation point and angular error are measured；
Step S5: measurement conduit parameter obtains catheter end head angle error value α and range error value Δ ρ2；
Step S6: handling measurement data, determines that error parameter scatterplot is distributed bandwidth.
2. a kind of installation error modeling and compensation method for being flared conduit according to claim 1, it is characterised in that: described
Space polar coordinate system in step S1 includes:
Theoretical space polar coordinate systemWherein ρ indicates coordinate point is to initial point distance, and θ is indicated and Z axis angle,Expression and X
Axle clamp angle；
Structure real space polar coordinate systemWherein ρ1Indicates coordinate point is to initial point distance, θ1Expression and Z1Axle clamp angle,
Expression and X1Axle clamp angle；
Conduit real space polar coordinate systemWherein ρ2Indicates coordinate point is to initial point distance, θ2Expression and Z2Axle clamp angle,Expression and X2Axle clamp angle.
3. a kind of installation error modeling and compensation method for being flared conduit according to claim 2, it is characterised in that: described
Structural failure in step S2 is Δ1, conduit error is Δ2；
Wherein:
Δ1For structural failure, Δ ρ1、Δθ1、Respectively indicate Standard space polar coordinate system and theoretical space polar coordinate system it
Between, with initial point distance error, with Z axis angle error, with X-axis angle error；
Δ2For conduit error, Δ ρ2、Δθ2、Respectively indicate catheter space polar coordinate system and Standard space polar coordinate it
Between, with initial point distance error, with Z axis angle error, with X-axis angle error.
4. a kind of installation error modeling and compensation method for being flared conduit according to claim 1, it is characterised in that: described
Composition error in step S3 is Δ:
Wherein: Δ ρ, Δ α are that conduit installs final composition error.
5. a kind of installation error modeling and compensation method for being flared conduit according to claim 1, it is characterised in that: described
Step S4 is specifically referred to: choose 4 holes respectively as reference point, measure reference point location error and Calculation Plane angle miss
Difference and location error；Specifically includes the following steps:
Step S41: 1-4 point reference point the most is chosen, 1-4 point actual error value (Δ x is measuredi, Δ yi, Δ
zi), wherein i indicates 1-4 point serial number；
Step S42: calculating separately out the Δ z difference of 2, No. 3 points and 1, No. 4 point, using space geometry calculate straight line 23,
Straight line 14 and plane included angle Δ α23With Δ α14；
Step S43: calculating separately out the Δ z difference of 1, No. 2 point and 3, No. 4 points, using space geometry calculate straight line 12,
Straight line 34 and plane included angle Δ α12With Δ α34；
Step S44: plane is gone out along X-axis rotation angle Δ θ according to calculated angle calcu-lation in 2, No. 3 points34With Y-axis rotation angle Δ
Φ34；
Step S45: according to 1-4 point and installation point distance and 1-4 point Δ z value, installation point range error Δ is calculated
ρ1。
6. a kind of installation error modeling and compensation method for being flared conduit according to claim 5, it is characterised in that: described
Step S5 is specifically referred to: being chosen 2 measurement positions in conduit straightway, is utilized the measuring machine measurement conduit position annulus center of circle
Space coordinate obtains conduit axis curve by fitting, compares axis curve and theoretical curve, obtain catheter end head angular error
Value α and range error value Δ ρ2。
7. a kind of installation error modeling and compensation method for being flared conduit according to claim 6, it is characterised in that: described
Step S6 is specifically referred to: being counted to the measurement result in step S5, the scatter plot of rendering error parameter, point of observation bit distribution feelings
Condition rejects the point to differ greatly with mainstream distributed areas, and determines that error parameter scatterplot is distributed bandwidth.
8. a kind of installation error modeling and compensation method for being flared conduit according to claim 7, it is characterised in that: also wrap
Include step S7: error compensation application；Specifically includes the following steps:
Step S71: according to the measurement statistical result of error parameter, the error parameter average value after screening is calculated, is made with this
For structure and conduit error parameter.
Step S72: bringing structure and conduit error parameter into step S2, calculates when composition error is 0, what conduit need to compensate
Error amount；
Step S73: front and back error amount difference is compensated according to conduit, adjusts conduit theory point in CNC tube bending machine.
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Cited By (6)
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| CN111897287A (en) * | 2020-06-17 | 2020-11-06 | 成都飞机工业（集团）有限责任公司 | Conduit installation error modeling and compensating method based on digital quantity |
| CN113941905A (en) * | 2021-10-25 | 2022-01-18 | 湖南工学院 | Error and path compensation method for efficient and precise machining of ore-raising pipeline |
| CN114537705A (en) * | 2022-04-25 | 2022-05-27 | 成都飞机工业（集团）有限责任公司 | Airplane flaring conduit belt error assembly method and device, storage medium and equipment |
| CN114537705B (en) * | 2022-04-25 | 2022-08-12 | 成都飞机工业（集团）有限责任公司 | Airplane flaring conduit assembly method and device with errors, storage medium and equipment |
| CN115111453A (en) * | 2022-06-22 | 2022-09-27 | 四川航天长征装备制造有限公司 | Five-way joint size prediction method based on digital manufacturing |
| CN115111453B (en) * | 2022-06-22 | 2023-06-30 | 四川航天长征装备制造有限公司 | Five-way joint size prediction method based on digital manufacturing |
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