CN105095605A - Simulation method of airplane conduit machining process - Google Patents
Simulation method of airplane conduit machining process Download PDFInfo
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- CN105095605A CN105095605A CN201510584041.4A CN201510584041A CN105095605A CN 105095605 A CN105095605 A CN 105095605A CN 201510584041 A CN201510584041 A CN 201510584041A CN 105095605 A CN105095605 A CN 105095605A
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- simulation
- fabrication process
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Abstract
The invention provides a simulation method of an airplane conduit machining process. The simulation method comprises the following steps: 1) according to the dimension information of a conduit to be machined, carrying out pipe-bending machine and mould parameterized matching; 2) planning a machining process path; 3) carrying out motion simulation and checking interference; and 4) according to a simulation result, regulating a scheme. The method has the characteristics of being high in accuracy, high in speed and the like, can be used for analyzing an airplane conduit machining technology scheme and provides a basis for judging whether a conduit machining file is correct or not. The simulation method has a good practical value and a wide application prospect in the technical field of airplane conduit machining.
Description
Technical field
The present invention relates to a kind of aircraft catheter fabrication process simulation method, for working out aircraft catheter fabrication file, belonging to aircraft digital advanced manufacturing technology field.
Background technology
Numerical control conduit Accurate Shaping technology not only can realize the Accurate Shaping of conduit and the robotization of production run, and meet high precision, high-performance, high-level efficiency and digitized processing request are bent to pipe fitting, therefore in aerospace high-tech area, numerical control guiding-tube bend technology progressively instead of traditional conduit technique, occupies critical role.
Compared with processing with numerical control cutting, CNC tube bending machine complex structure, comprises tens moving components, there is more serious collision dangerous in interference in catheter fabrication process.In aircraft catheter fabrication process, that be shaped and bending pipe fitting grand movement, makes itself and lathe, mould and fixture and the ground that works, possibility that factory building collides is very big.In order to ensure safety, enhancing productivity, reducing production cost, strict examination must be carried out to the NC program of conduit.Simultaneously along with the light-weighted development of product, the application of numerical control catheter device increases day by day, need to carry out a large amount of pre-stage tests and mode transfer process repeatedly for the cannula member of different size, material in actual production, take time and effort, therefore day by day urgent to the emulation demand of aircraft catheter fabrication process.
Summary of the invention
The object of this invention is to provide a kind of aircraft catheter fabrication process simulation method, it is high, stable that the method has counting yield, the features such as error is little, solve the critical problem of aircraft catheter fabrication file quick obtaining, effectively demonstrate the rationality of conduit operation, improve the acquisition efficiency of aircraft catheter fabrication data.
The present invention implements by the following technical programs: aircraft catheter fabrication process simulation method, comprises the following steps:
1) tube bender, die parametersization coupling is carried out according to conduit dimension information to be processed;
2) process path planning;
3) motion simulation, checks and interferes;
4) project setting is carried out according to simulation result.
Described step 1) comprises two large divisions, and the first obtains conduit dimension information to be processed, and it two is arrange tube bender, Mould Machining range data storehouse match the mould required for conduit to be processed according to the range of work of different mould.Being specially of described acquisition conduit dimension information to be processed, according to the structure tree information of part, by the mode of fixing directory search, filter out the external diameter of conduit, inwall, wall thickness, bending radius, material information storing successively, for coupling tube bender, mould provide foundation.
Described step 2) be specially: suppose that conduit form is L, the time is t, and the step-length of direct feeding is n, and the step-length of Space Rotating is n
1, the step-length that winding mold is bending is n
2, Y is straight line, and B is Space Rotating angle, and C is winding mold angle of bend, L
0for the form of a upper moment conduit, then have:
A, as nt≤Y, straight-line feed, L=nt;
As nt > Y, enter step b;
If b is B=0, or (t-Y/n) * n
1during > B, enter step c;
When B ≠ 0, (t-Y/n) * n
1during≤B, Space Rotating, L rotates B around Y-axis
1, wherein B
1=(t-Y/n) * n
1;
C, when C ≠ 0, (t-Y/n-B/n
1) * n
2during≤C, winding mold bends, and L is around Z axis choosing dress C
1, wherein C
1=n
2* (t-Y/n-B/n
1);
If C=0 or (t-Y/n-B/n
1) * n > C time, this organizes release, now completes one group of YBC action, can obtain thus each moment conduit formed.
The concrete simulation process of described step 3) is expressed as follows:
S1, for a certain emulator command M, at a time T, add each reference mark P of conduit
1(X
1, Y
1, Z
1), then adjacent two reference mark P
iand P
i+1the line segment L of composition
ithere is following parameter expression:
X=X
1+t
，*（X
i+1-X
1）；
Y=Y
1+t
，*（Y
i+1-Y
1）；
Z=Z
1+t
，*（Z
i+1-Z
1）；
0≤t
，≤1；i=0,1，....，n-1；
Then line segment L is obtained
iwith the intersection point on each realistic model surface in simulated environment, if intersection point exists, obtain intersection value, turn S
4; Otherwise, ask for P
1point to P
i+1ray and simulated environment in first imaginary intersection point, now t of model surface
,> 1, is designated as t
0, enter S
2if ray and simulated environment, without intersection point, enter S
3;
S
2, by obtain coordinate obtain t
,from 1 to t
0the distance L of point-to-point transmission and ray P
1p
i+1be α with the angle of object plane, if the external diameter of conduit is r, if L*tan α < is r, turn S
4, otherwise return S
1;
S
3if, the minor increment D < r of object in ray and simulated environment, then enter S
4, otherwise return S
1;
S
4, by this section of conduit hypostazation, carry out entity cap with the model in simulated environment, ask interference region.
If described step 4) carries out project setting first time emulation according to simulation result interference, then conduit is carried out reverse machining simulation, if still have interference, then redesign conduit.
Beneficial effect of the present invention: the present invention has the features such as accuracy is high, speed is fast, can be used for analysis of aircraft catheter fabrication process program, for catheter fabrication file correctness provides foundation.The present invention has good practical value and wide application prospect in aircraft catheter fabrication technical field.
Accompanying drawing explanation
Fig. 1 is aircraft catheter fabrication process simulation process flow diagram of the present invention.
Fig. 2 is the schematic diagram of CNC tube bending machine kinematic axis Y, B, C.
Fig. 3 is the structure diagram of pressing mold.
Fig. 4 is the structure diagram of clamping.
Fig. 5 is the structure diagram of bending die.
Fig. 6 is conduit simulation object model structure block diagram of the present invention.
Embodiment
Fig. 1 is the idiographic flow of the aircraft catheter fabrication process simulation method that the present invention proposes, and the key step that the method realizes comprises: 1) carry out tube bender, die parametersization coupling according to conduit dimension information to be processed; 2) process path planning; 3) motion simulation, checks and interferes; 4) project setting is carried out according to simulation result.
Described step 1) carries out tube bender, die parametersization coupling according to the dimension information of conduit to be processed, comprises (1) and obtains conduit dimension information to be processed, (2) tube bender, Mould Machining range data storehouse is arranged, wherein said (1) obtains conduit dimension information to be processed, namely according to the structure tree information of part, by the mode of fixing directory search, filter out the external diameter of conduit, inwall, wall thickness, bending radius, material information storing successively, for coupling tube bender, mould provide foundation, described (2) arrange tube bender, Mould Machining range data storehouse, wherein tube bender has Multiple Type, its range of work of the tube bender of different model is different, the normal structure of a set of catheter mold is primarily of bending die, clamping, pressing mold, plug, Anti-wrinkling board etc. five part forms, during work, its course of action is: plug enters core, clamping clamping tubing rotates with bending die, pressing mold compresses tubing along with bending two of tubing and follows, and Anti-wrinkling board maintains static, after conduit angle reaches set angle, plug exits, pressing mold, reset is unclamped in clamping, complete set, CNC tube bending machine kinematic axis Y, B, C as shown in Figure 2.
In machining simulation, anti-wrinkling mould can by pipe fitting blank reverse modeling, generate with the groove slightly larger than pipe fitting diameter, concrete groove diameter is determined according to production requirement, plug mainly plays a supportive role, its diameter dimension is generally slightly less than pipe internal diameter, machining simulation is less demanding to it, and the preparatory stage can be generated by pipe diameter size reverse modeling.The mould of major parameter is bending die, clamping, pressing mold, according to the range of work of different mould, matches the mould required for tubing.
In catheter procedure, pressing mold mainly compresses tubing, and auxiliary pushing bending pipes, pressing mold movement velocity in theory should with tubing rotate linear velocity consistent, the structure diagram of pressing mold as shown in Figure 3, L1, L2, L3 tri-limits can upgrade with catheter gauge little progress line parameterization to be processed.The key dimension of clamping design is length dimension, if it depend on two of product bending between straight section length, its structure diagram as shown in Figure 4, can carry out Parametric designing to L4 ~ L9 wherein.Bending die is the core of whole catheter mold, and device structure diagram as shown in Figure 5, can carry out parametrization by a, b, d, D, h, φ size in figure to it.
Described step 2) process path planning.The forming process of conduit is in fact the process that a catheter shape constantly changes, because conduit is an axisymmetric body, adopt its 3D shape of description that the center line of conduit just can be complete, thus to avoid in entity simulation repeatedly modeling to cause the drawback that simulation efficiency is low, high to machine performance requirement.
Suppose that conduit form is L, the time is t, and the step-length of direct feeding is n, and the step-length of Space Rotating is n
1, the step-length that winding mold is bending is n
2, Y is straight line, and B is Space Rotating angle, and C is winding mold angle of bend, L
0for the form of a upper moment conduit, then have:
A, as nt≤Y, straight-line feed, L=nt;
As nt > Y, enter step b;
If b is B=0, or (t-Y/n) * n
1during > B, enter step c;
When B ≠ 0, (t-Y/n) * n
1during≤B, Space Rotating, L rotates B around Y-axis
1, wherein B
1=(t-Y/n) * n
1;
C, when C ≠ 0, (t-Y/n-B/n
1) * n
2during≤C, winding mold bends, and L is around Z axis choosing dress C
1, wherein C
1=n
2* (t-Y/n-B/n
1);
If C=0 or (t-Y/n-B/n
1) * n > C time, this organizes release, now completes one group of YBC action, can obtain thus each moment conduit formed.
Described step 3) motion simulation, checks and interferes.The motion model of catheter fabrication emulation has tube bender, workpiece, catheter mold, environment, wherein tube bender can be divided into parts 1, parts 2... parts n, workpiece is catheter blank, catheter mold can be divided into bending die, pressing mold, clamping, anti-wrinkling mould, plug, environment comprise wall, ground and other, its structured flowchart is as shown in Figure 6.
Interference and collision in numerical control catheter fabrication process detects the content comprising two aspects: be chuck and curved piece on the one hand, between pressure mould and clamping die, interference and collision detects, this situation likely occurs when y instruction performs; Be on the other hand the pipe fitting of constantly change in process and machine tool component, interference and collision between ground and surrounding environment object detects.The task of collision detection determines at a time t exactly, and whether the geometric model in simulated environment and moving object interfere, and namely whether their common factor is not empty, if the collision occurred, need to determine the point of impingement, concrete simulation process is expressed as follows:
S1, for a certain emulator command M, at a time T, add each reference mark P of conduit
1(X
1, Y
1, Z
1), then adjacent two reference mark P
iand P
i+1the line segment L of composition
ithere is following parameter expression:
X=X
1+t
，*（X
i+1-X
1）；
Y=Y
1+t
，*（Y
i+1-Y
1）；
Z=Z
1+t
，*（Z
i+1-Z
1）；
0≤t
，≤1；i=0,1，....，n-1；
Then line segment L is obtained
iwith the intersection point on each realistic model surface in simulated environment, if intersection point exists, obtain intersection value, turn S
4; Otherwise, ask for P
1point to P
i+1ray and simulated environment in first imaginary intersection point, now t of model surface
,> 1, is designated as t
0, enter S
2if ray and simulated environment, without intersection point, enter S
3;
S
2, by obtain coordinate obtain t
,from 1 to t
0the distance L of point-to-point transmission and ray P
1p
i+1be α with the angle of object plane, if the external diameter of conduit is r, if L*tan α < is r, turn S
4, otherwise return S
1;
S
3if, the minor increment D < r of object in ray and simulated environment, then enter S
4, otherwise return S
1;
S
4, by this section of conduit hypostazation, carry out entity cap with the model in simulated environment, ask interference region.
If described step 4) carries out project setting first time emulation according to simulation result interference, then conduit is carried out reverse machining simulation, if still have interference, then redesign conduit.
S
4, by this section of conduit hypostazation, carry out entity cap with the model in simulated environment, ask interference region.
If described step 4) carries out project setting first time emulation according to simulation result interference, then conduit is carried out reverse machining simulation, if still have interference, then redesign conduit.
Claims (6)
1. aircraft catheter fabrication process simulation method, is characterized in that comprising the following steps:
1) tube bender, die parametersization coupling is carried out according to conduit dimension information to be processed;
2) process path planning;
3) motion simulation, checks and interferes;
4) project setting is carried out according to simulation result.
2. aircraft catheter fabrication process simulation method as claimed in claim 1, it is characterized in that described step 1) comprises two large divisions, the first obtains conduit dimension information to be processed, and it two is arrange tube bender, Mould Machining range data storehouse match the mould required for conduit to be processed according to the range of work of different mould.
3. aircraft catheter fabrication process simulation method as claimed in claim 2, it is characterized in that: being specially of described acquisition conduit dimension information to be processed, according to the structure tree information of part, by the mode of fixing directory search, filter out the external diameter of conduit, inwall, wall thickness, bending radius, material information storing successively, for coupling tube bender, mould provide foundation.
4. aircraft catheter fabrication process simulation method as claimed in claim 1, is characterized in that described step 2) be specially: suppose that conduit form is L, the time is t, and the step-length of direct feeding is n, and the step-length of Space Rotating is n
1, the step-length that winding mold is bending is n
2, Y is straight line, and B is Space Rotating angle, and C is winding mold angle of bend, L
0for the form of a upper moment conduit, then have:
A, as nt≤Y, straight-line feed, L=nt;
As nt > Y, enter step b;
If b is B=0, or (t-Y/n) * n
1during > B, enter step c;
When B ≠ 0, (t-Y/n) * n
1during≤B, Space Rotating, L rotates B around Y-axis
1, wherein B
1=(t-Y/n) * n
1;
C, when C ≠ 0, (t-Y/n-B/n
1) * n
2during≤C, winding mold bends, and L is around Z axis choosing dress C
1, wherein C
1=n
2* (t-Y/n-B/n
1);
If C=0 or (t-Y/n-B/n
1) * n > C time, this organizes release, now completes one group of YBC action, can obtain thus each moment conduit formed.
5. aircraft catheter fabrication process simulation method as claimed in claim 1, is characterized in that the concrete simulation process of described step 3) is expressed as follows:
S1, for a certain emulator command M, at a time T, add each reference mark P of conduit
1(X
1, Y
1, Z
1), then adjacent two reference mark P
iand P
i+1the line segment L of composition
ithere is following parameter expression:
X=X
1+t
，*（X
i+1-X
1）；
Y=Y
1+t
，*（Y
i+1-Y
1）；
Z=Z
1+t
，*（Z
i+1-Z
1）；
0≤t
，≤1；i=0,1，....，n-1；
Then line segment L is obtained
iwith the intersection point on each realistic model surface in simulated environment, if intersection point exists, obtain intersection value, turn S
4; Otherwise, ask for P
1point to P
i+1ray and simulated environment in first imaginary intersection point, now t of model surface
,> 1, is designated as t
0, enter S
2if ray and simulated environment, without intersection point, enter S
3;
S
2, by obtain coordinate obtain t
,from 1 to t
0the distance L of point-to-point transmission and ray P
1p
i+1be α with the angle of object plane, if the external diameter of conduit is r, if L*tan α < is r, turn S
4, otherwise return S
1;
S
3if, the minor increment D < r of object in ray and simulated environment, then enter S
4, otherwise return S
1;
S
4, by this section of conduit hypostazation, carry out entity cap with the model in simulated environment, ask interference region.
6. aircraft catheter fabrication process simulation method as claimed in claim 1, if it is characterized in that, described step 4) is carried out project setting first time emulation according to simulation result and is had interference, then conduit is carried out reverse machining simulation, if still have interference, then redesign conduit.
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|---|---|---|---|
| CN201510584041.4A CN105095605B (en) | 2015-09-15 | 2015-09-15 | Aircraft catheter fabrication process simulation method |
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|---|---|---|---|
| CN201510584041.4A CN105095605B (en) | 2015-09-15 | 2015-09-15 | Aircraft catheter fabrication process simulation method |
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| CN105095605B CN105095605B (en) | 2019-02-22 |
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Cited By (7)
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| CN106354919A (en) * | 2016-08-26 | 2017-01-25 | 北京星航机电装备有限公司 | Digital and precise formation method for pipeline |
| CN107725937A (en) * | 2017-09-08 | 2018-02-23 | 陕西飞机工业（集团）有限公司 | A kind of conduit sampling method |
| CN108363887A (en) * | 2018-03-09 | 2018-08-03 | 西安交通大学 | A kind of multi-level serial optimization method of fluid machinery simulated program |
| CN110688793A (en) * | 2019-09-23 | 2020-01-14 | 成都飞机工业（集团）有限责任公司 | Secondary shape correction quality checking method during assembly of aviation elbow based on finite element |
| CN111400860A (en) * | 2019-12-23 | 2020-07-10 | 北京星航机电装备有限公司 | Pipeline trend machinability inspection method |
| CN113414259A (en) * | 2021-06-23 | 2021-09-21 | 江苏理工学院 | Space S-bend anti-wrinkle process for large-size multilayer composite hollow pipe |
| CN115178625A (en) * | 2022-07-08 | 2022-10-14 | 江西洪都航空工业集团有限责任公司 | Method for manufacturing guide pipe sample |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106354919A (en) * | 2016-08-26 | 2017-01-25 | 北京星航机电装备有限公司 | Digital and precise formation method for pipeline |
| CN106354919B (en) * | 2016-08-26 | 2019-07-02 | 北京星航机电装备有限公司 | A kind of pipeline digitlization accurate forming method |
| CN107725937A (en) * | 2017-09-08 | 2018-02-23 | 陕西飞机工业（集团）有限公司 | A kind of conduit sampling method |
| CN108363887A (en) * | 2018-03-09 | 2018-08-03 | 西安交通大学 | A kind of multi-level serial optimization method of fluid machinery simulated program |
| CN110688793A (en) * | 2019-09-23 | 2020-01-14 | 成都飞机工业（集团）有限责任公司 | Secondary shape correction quality checking method during assembly of aviation elbow based on finite element |
| CN111400860A (en) * | 2019-12-23 | 2020-07-10 | 北京星航机电装备有限公司 | Pipeline trend machinability inspection method |
| CN113414259A (en) * | 2021-06-23 | 2021-09-21 | 江苏理工学院 | Space S-bend anti-wrinkle process for large-size multilayer composite hollow pipe |
| CN113414259B (en) * | 2021-06-23 | 2022-08-16 | 江苏理工学院 | Space S-bend anti-wrinkle process for large-size multilayer composite hollow pipe |
| CN115178625A (en) * | 2022-07-08 | 2022-10-14 | 江西洪都航空工业集团有限责任公司 | Method for manufacturing guide pipe sample |
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