CN107665263A - Auto parts and components lap position lacquer painting cracking detection method, system and vehicle - Google Patents
Auto parts and components lap position lacquer painting cracking detection method, system and vehicle Download PDFInfo
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- CN107665263A CN107665263A CN201610596694.9A CN201610596694A CN107665263A CN 107665263 A CN107665263 A CN 107665263A CN 201610596694 A CN201610596694 A CN 201610596694A CN 107665263 A CN107665263 A CN 107665263A
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- parts
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- lap position
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- Computer Hardware Design (AREA)
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
Abstract
The invention provides a kind of auto parts and components lap position lacquer painting cracking detection method and system, this method to include：Establish the threedimensional model of the first parts to be overlapped and the second parts；According to the first parts and the threedimensional model of the second parts, the FEM model overlapped is established using finite element analysis software, wherein, the section point of the first node of the first parts and the second parts corresponds on lap position；Free degree constraint is carried out to the first parts in FEM model and the second parts；Apply load to FEM model, extract the positional value of first node and section point in lap position；Determine whether the first parts and the second parts meet design requirement according to the shift value of the shift value of first node and section point.The method of the present invention can be judged lacquer painting cracking risk, so as to reduce the cost that research and development later stage cracking problem is rectified and improved again, save the automobile research and development time.
Description
Technical field
The present invention relates to automobile technical field, more particularly to a kind of auto parts and components lap position lacquer painting cracking detection method
And system.
Background technology
The lacquer painting of body of a motor car part lap position may ftracture.Current detection mode is after automobile research and development
Phase, the long duration test of vehicle road is carried out to detect whether there occurs the problem of part lap position lacquer painting cracking, especially car
This problem occurs for body outer covering piece, and quality and the rectification cost that can influence automobile product are high.Specifically, body of a motor car part is taken
Whether can ftracture can only when research and develop later stage progress vehicle road long duration test find, if this stage is to part if connecing position lacquer painting
Structure, which is modified, to be needed to change mould, spends cost high.If not changing design of part, the method solution of weldering is protected by increasing
Certainly this problem, the aesthetics of body outer panel can be reduced.
The content of the invention
In view of this, the present invention is directed to propose a kind of auto parts and components lap position lacquer painting cracking detection method, this method
Lacquer painting cracking risk can be judged, so as to reduce the cost that research and development later stage cracking problem is rectified and improved again, saved
Automobile researches and develops the time.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of auto parts and components lap position lacquer painting cracking detection method, comprises the following steps：Establish to be overlapped first
The threedimensional model of parts and the second parts；According to first parts and the threedimensional model of the second parts, using having
Finite element analysis software establishes the FEM model of overlap joint, wherein, the first node of the first parts and the 2nd 0 on lap position
The section point of part corresponds；First parts and the second parts in the FEM model are carried out freely
Degree constraint；Apply load to the FEM model, extract the positional value of first node and section point in lap position；According to
The shift value of the shift value of the first node and the section point determines first parts and second parts
Whether design requirement is met.
Further, the free degree constraint includes suspension and the free degree of the body mounts under global coordinate system about
Beam.
Further, it is described to apply load to the FEM model, extract first node and the second section in lap position
The step of positional value of point, includes：Apply load to the FEM model；The first node and section point are extracted complete
Positional value in office's coordinate system.
Further, the described 1st is determined according to the shift value of the shift value of the first node and the section point
The step of whether part and second parts meet design requirement includes：According to the shift value of the first node and described
The shift value of section point calculates the relative displacement of the first node and the section point；Judged according to the relative displacement
Whether first parts and second parts meet design requirement.
Further, when it is determined that first parts and second parts meet design requirement, according to described
The three-dimension modeling mould of first parts and the second parts.
Relative to prior art, auto parts and components lap position lacquer painting cracking detection method of the present invention has following
Advantage：
Auto parts and components lap position lacquer painting cracking detection method of the present invention, overlapped using finite element analysis part
Whether position lacquer painting can be ftractureed, and extraction part lap position relative displacement is judged lacquer painting cracking risk, so as to
The cost that research and development later stage cracking problem is rectified and improved again is reduced, saves the automobile research and development time.
It is another object of the present invention to propose a kind of auto parts and components lap position lacquer painting cracking detecting system, this is
System can be judged lacquer painting cracking risk, so as to reduce the cost that research and development later stage cracking problem is rectified and improved again, section
Save the automobile research and development time.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of auto parts and components lap position lacquer painting cracking detecting system, including：Three-dimension modeling module, for establishing
First parts to be overlapped and the threedimensional model of the second parts；FEM model establishes module, for according to described first
The threedimensional model of parts and the second parts, the FEM model of overlap joint is established using finite element analysis software, wherein, overlap joint
The section point of the first node of the first parts and the second parts corresponds on position；Constraints module, for described
First parts and the second parts in FEM model carry out free degree constraint；Extraction module, for having to described
Limit meta-model and apply load, extract the positional value of first node and section point in lap position；Computing module, for according to institute
The shift value of the shift value and the section point of stating first node determines that first parts and second parts are
It is no to meet design requirement.
Further, the free degree constraint includes suspension and the free degree of the body mounts under global coordinate system about
Beam.
Further, the extraction module is used to apply load to the FEM model, and extracts the first node
With positional value of the section point in global coordinate system.
Further, the computing module is used for the displacement of the shift value and the section point according to the first node
Value calculates the relative displacement of the first node and the section point, and judges described one zero according to the relative displacement
Whether part and second parts meet design requirement.
Further, in addition to：Mould establishes module, for determining first parts and institute in the computing module
When stating the second parts and meeting design requirement, according to first parts and the three-dimension modeling mould of the second parts.
Described auto parts and components lap position lacquer painting cracking detecting system and above-mentioned auto parts and components lap position paint
Face cracking detection method is same relative to Dominant Facies possessed by prior art, will not be repeated here.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the auto parts and components lap position lacquer painting cracking detection method described in the embodiment of the present invention；
The FEM model that Fig. 2 is established in the method for controlling cooling system for the engine described in the embodiment of the present invention shows
It is intended to；
Fig. 3 is the structured flowchart of the cooling system control system of the engine described in the embodiment of the present invention.
Description of reference numerals：
Auto parts and components lap position lacquer painting cracking detecting system 300, three-dimension modeling module 310, FEM model
Establish module 320, constraints module 330, extraction module 340, computing module 350.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 is the flow of auto parts and components lap position lacquer painting cracking detection method according to an embodiment of the invention
Figure.
As shown in figure 1, auto parts and components lap position lacquer painting cracking detection method according to an embodiment of the invention, bag
Include following steps：
S101：Establish the threedimensional model of the first parts to be overlapped and the second parts.
Such as：Part to be analyzed (the first parts and the second parts i.e. to be overlapped) is established using 3 d modeling software
Threedimensional model.
S102：According to the first parts and the threedimensional model of the second parts, established and overlapped using finite element analysis software
FEM model, wherein, a pair of the section point 1 of the first node of the first parts and the second parts on lap position
Should.
That is, establish FEM model using finite element analysis software.As shown in Fig. 2 wherein the first parts are
Part 1, the second parts in Fig. 2 are the part 2 in Fig. 2.Can be with using the node projecting function in finite element analysis software
Ensure the node A of two part (part 1 and part 2) lap positionsnAnd BnCorrespond, wherein, node AnFor first node,
Node BnIt is corresponding on the two above-below direction in fig. 2 for section point.
S103：Free degree constraint is carried out to the first parts in FEM model and the second parts.
Free degree constraint includes the free degree of the suspension with body mounts under global coordinate system and constrained.That is, have
Limiting meta-model vehicle body interception position and carry out staff cultivation, suspension constrains the free degree on 1,2,3 these three directions with body mounts,
Wherein, 1 be X to 2 be Y-direction, and 3 be Z-direction.
S104：Apply load to FEM model, extract the positional value of first node and section point in lap position.
Specifically, apply load to FEM model, and extract first node and section point in global coordinate system
Positional value.That is, applying load to FEM model, extract the node that each two is corresponding at lap position and sat in the overall situation
It is lower X to mark, Y, the shift value under these three directions of Z axis, uses AniAnd BniCorresponding node is represented, n is the numbering of node, and i can
Take 1,2,3,1 for X to 2 be Y-direction, and 3 be Z-direction.As first node and section point are corresponding.
S105：First parts and the second parts are determined according to the shift value of the shift value of first node and section point
Whether design requirement is met.
Specifically, first node and second section are calculated according to the shift value of the shift value of first node and section point
The relative displacement of point；Judge whether the first parts and second parts meet design requirement according to relative displacement.
As a specific example, the relative displacement U between two partsnIt can be obtained by equation below：Un=|
Ani-Bni|.If relative displacement UnLess than predetermined value, then it is assumed that the first parts and second parts meet design requirement,
After being installed on vehicle, the risk of auto parts and components lap position lacquer painting cracking is smaller.Otherwise as relative displacement UnBe more than or
Equal to predetermined value, then it is assumed that it is at least one in the first parts and second parts to be unsatisfactory for design requirement, when in vehicle
After upper installation, the risk of auto parts and components lap position lacquer painting cracking is larger, it is necessary to redesign part.
It is understood that above-mentioned predetermined value can determine according to design requirement.
In one embodiment of the invention, when it is determined that the first parts and second parts meet design requirement
When, according to the first parts and the three-dimension modeling mould of the second parts.
Auto parts and components lap position lacquer painting cracking detection method according to embodiments of the present invention, utilizes finite element analysis zero
Whether part lap position lacquer painting can be ftractureed, and extraction part lap position relative displacement is judged lacquer painting cracking risk, from
And the cost that research and development later stage cracking problem is rectified and improved again can be reduced, save the automobile research and development time.
Fig. 3 is the structural frames of auto parts and components lap position lacquer painting cracking detecting system according to an embodiment of the invention
Figure.As shown in figure 3, auto parts and components lap position lacquer painting cracking detecting system 300 according to an embodiment of the invention, bag
Include：Three-dimension modeling module 310, FEM model establish module 320, constraints module 330, extraction module 340 and calculate mould
Block 350.
Wherein, three-dimension modeling module 310 is used for the three-dimensional for establishing the first parts to be overlapped and the second parts
Model.FEM model is established module 320 and is used for according to the threedimensional models of first parts and the second parts, using having
Finite element analysis software establishes the FEM model of overlap joint, wherein, the first node of the first parts and the 2nd 0 on lap position
The section point of part corresponds.Constraints module 330 is used for first parts in the FEM model and the
Two parts carry out free degree constraint.Extraction module 340 is used to apply load to the FEM model, extracts in lap position
The positional value of first node and section point.Computing module 350 is used for according to the shift value of the first node and described second
The shift value of node determines whether first parts and second parts meet design requirement.
In one embodiment of the invention, the free degree constraint includes suspension with body mounts in global coordinate system
Under the free degree constraint.
In one embodiment of the invention, the extraction module 340 is used to apply load to the FEM model, and
Extract the positional value of the first node and section point in global coordinate system.
In one embodiment of the invention, the computing module 350 be used for according to the shift value of the first node and
The shift value of the section point calculates the relative displacement of the first node and the section point, and according to the relative position
Shifting judges whether first parts and second parts meet design requirement.
In one embodiment of the invention, auto parts and components lap position lacquer painting cracking detecting system 300, in addition to：
Mould establishes module (being not shown in Fig. 3), and mould establishes module and is used to determine described one zero in the computing module 350
When part and second parts meet design requirement, according to first parts and the three-dimension modeling of the second parts
Mould.
Auto parts and components lap position lacquer painting cracking detecting system according to embodiments of the present invention, utilizes finite element analysis zero
Whether part lap position lacquer painting can be ftractureed, and extraction part lap position relative displacement is judged lacquer painting cracking risk, from
And the cost that research and development later stage cracking problem is rectified and improved again can be reduced, save the automobile research and development time.
It should be noted that the specific reality of the auto parts and components lap position lacquer painting cracking detecting system of the embodiment of the present invention
The specific implementation class of the auto parts and components lap position lacquer painting cracking detection method of existing mode and the above embodiment of the present invention
Seemingly, the description of method part is specifically referred to, in order to reduce redundancy, is not repeated herein.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (10)
1. a kind of auto parts and components lap position lacquer painting cracking detection method, it is characterised in that comprise the following steps：
Establish the threedimensional model of the first parts to be overlapped and the second parts；
According to first parts and the threedimensional model of the second parts, the limited of overlap joint is established using finite element analysis software
Meta-model, wherein, the section point of the first node of the first parts and the second parts corresponds on lap position；
Free degree constraint is carried out to first parts and the second parts in the FEM model；
Apply load to the FEM model, extract the positional value of first node and section point in lap position；
First parts and described are determined according to the shift value of the shift value of the first node and the section point
Whether two parts meet design requirement.
2. auto parts and components lap position lacquer painting cracking detection method according to claim 1, it is characterised in that it is described from
Include the free degree of the suspension with body mounts under global coordinate system by degree constraint to constrain.
3. auto parts and components lap position lacquer painting cracking detection method according to claim 1, it is characterised in that it is described to
The FEM model applies load, and the step of extracting the positional value of first node and section point in lap position includes：
Apply load to the FEM model；
Extract the positional value of the first node and section point in global coordinate system.
4. auto parts and components lap position lacquer painting cracking detection method according to claim 1, it is characterised in that according to institute
The shift value of the shift value and the section point of stating first node determines that first parts and second parts are
No the step of meeting design requirement, includes：
The first node and described second are calculated according to the shift value of the shift value of the first node and the section point
The relative displacement of node；
Judge whether first parts and second parts meet design requirement according to the relative displacement.
5. the auto parts and components lap position lacquer painting cracking detection method according to claim any one of 1-4, its feature exist
In when it is determined that first parts and second parts meet design requirement, according to first parts and
The three-dimension modeling mould of two parts.
The detecting system 6. a kind of auto parts and components lap position lacquer painting ftractures, it is characterised in that including：
Three-dimension modeling module, for establishing the threedimensional model of the first parts to be overlapped and the second parts；
FEM model establishes module, limited for the threedimensional model according to first parts and the second parts, utilization
Meta analysis software establishes the FEM model of overlap joint, wherein, the first node of the first parts and the 2nd 0 on lap position
The section point of part corresponds；
Constraints module, for carrying out the free degree about to first parts and the second parts in the FEM model
Beam；
Extraction module, for applying load to the FEM model, extract first node and section point in lap position
Positional value；
Computing module, the shift value for the shift value according to the first node and the section point determine the described 1st
Whether part and second parts meet design requirement.
The detecting system 7. auto parts and components lap position lacquer painting according to claim 6 ftractures, it is characterised in that it is described from
Include the free degree of the suspension with body mounts under global coordinate system by degree constraint to constrain.
The detecting system 8. auto parts and components lap position lacquer painting according to claim 6 ftractures, it is characterised in that described to carry
Modulus block is used to apply load to the FEM model, and extracts the first node and section point in global coordinate system
Positional value.
The detecting system 9. auto parts and components lap position lacquer painting according to claim 6 ftractures, it is characterised in that the meter
Module is calculated to be used to calculate the first node and institute according to the shift value of the first node and the shift value of the section point
State the relative displacement of section point, and judge whether are first parts and second parts according to the relative displacement
Meet design requirement.
10. the auto parts and components lap position lacquer painting cracking detecting system according to claim any one of 6-9, its feature exist
In, in addition to：
Mould establishes module, for determining that first parts and second parts meet design in the computing module
It is required that when, according to first parts and the three-dimension modeling mould of the second parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610596694.9A CN107665263A (en) | 2016-07-27 | 2016-07-27 | Auto parts and components lap position lacquer painting cracking detection method, system and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610596694.9A CN107665263A (en) | 2016-07-27 | 2016-07-27 | Auto parts and components lap position lacquer painting cracking detection method, system and vehicle |
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| CN107665263A true CN107665263A (en) | 2018-02-06 |
Family
ID=61114348
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610596694.9A Pending CN107665263A (en) | 2016-07-27 | 2016-07-27 | Auto parts and components lap position lacquer painting cracking detection method, system and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115859749A (en) * | 2023-02-17 | 2023-03-28 | 合肥联宝信息技术有限公司 | Constraint building method and device of three-dimensional model, electronic equipment and storage medium |
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| US20040148143A1 (en) * | 2003-01-24 | 2004-07-29 | The Boeing Company | Method and interface elements for finite-element fracture analysis |
| EP1953657A1 (en) * | 2005-11-07 | 2008-08-06 | Keio University | Numerical structure analyzer by load transfer path method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20180206 |