CN105956285B - A kind of Linear Mark method of adjustment towards Variant Design - Google Patents
A kind of Linear Mark method of adjustment towards Variant Design Download PDFInfo
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- CN105956285B CN105956285B CN201610296562.4A CN201610296562A CN105956285B CN 105956285 B CN105956285 B CN 105956285B CN 201610296562 A CN201610296562 A CN 201610296562A CN 105956285 B CN105956285 B CN 105956285B
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- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Abstract
The Linear Mark method of adjustment towards Variant Design that the invention discloses a kind of marks reference model knowledge base by establishing essential characteristic cell cube；The identification of essential characteristic cell cube is carried out to the model before modification；The size marking mode of the essential characteristic cell cube of identification, and find according to size marking mode the correspondence reference model of knowledge base；After modification, reference model knowledge base is marked according to essential characteristic cell cube to be adjusted the size of essential characteristic cell cube, position of the effective solution between size and model is unreasonable, Linear Mark confusion problem, entire size adjusting process is not necessarily to manual intervention, automatic, efficient solution is provided for the adjustment of size marking after part Variant Design, improves Variant Design efficiency, there is good application value.
Description
Technical field
The Linear Mark method of adjustment towards Variant Design that the present invention relates to a kind of.
Background technique
Currently, many experts and scholars conduct in-depth research Variant Design both at home and abroad, and have been achieved for
Achievement.But still there are many problems there are also to be solved, for example after carrying out Variant Design to product, labeling position can't
It is adjusted with product model modification, thus results in the mark of product model and the relative position of model and size after modification
There are many serious un-reasonable phenomenons in relative position between mark.The personnel of being commonly designed solve the problems, such as that this is by dragging manually
Dynamic size is adjusted, this has seriously affected the efficiency of Variant Design, be current Variant Design critical issue urgently to be resolved it
One.
Summary of the invention
It is an object of the invention to propose a kind of Linear Mark method of adjustment towards Variant Design, current zero is solved
Linear Mark confusion problem after part Variant Design.This method can quickly and accurately size marking after implementation model modification
Adjust automatically.
A kind of Linear Mark method of adjustment towards Variant Design of the present invention, includes the following steps:
S1: essential characteristic cell cube mark reference model knowledge base is established；
S2: all essential characteristic cell cubes of component part are identified；
S3: the size marking mode of the essential characteristic cell cube of identification, and knowledge base is found according to size marking mode
Corresponding reference model；
S4: to all sizes of model according to the different demarcation in locating mark face at several set of dimensions, wherein same level
For a set of dimensions；
S5: to the size in set of dimensions, classification of dimension set, acceptance of the bid are carried out according to the label direction of plane where size
Infusing direction is mutually all same size subset；
S6: size relative positional relationship two-by-two is carried out to the size in size subset and is judged；
S7: judging spatial position the constraint relationship, and all sizes are divided into several spatial position the constraint relationship collection
It closes, size layout is collectively referred to as behind the constraint relationship of spatial position；
S8: the size that each size is laid out is handled, eliminate location error, and record eliminate location error after it is each
Size marking position coordinates；
S9: model modification；
S10: the variable quantity of the relatively each size layout of model after modification is obtained；
S11: reference model knowledge base is marked according to feature unit body, the size of essential characteristic cell cube is adjusted；
S12: the variable quantity according to acquired in S10 is adjusted the size in S8 each size layout.
Further, the content of S1 essential characteristic cell cube mark reference model knowledge base includes:
S11. the various notation methods of essential characteristic cell cube；
S12. each reference model default size numerical value and extension line length；
S13. the extension line conversion relational expression of the extension line of reference model and entity.
Further, the essential characteristic cell cube in S1 mainly include cuboid, cylindrical body, cone and some users from
The cell cube of definition, the present invention in be collectively referred to as essential characteristic cell cube.
Further, S2 identifies the process of all essential characteristic cell cubes of component part, includes the following steps:
S21. first feature of model is obtained；
S22. the point, line, surface parameter of feature is obtained；
S23. pass through the point, line, surface parameters relationship recognition unit body of feature；
S24. next feature is obtained, S22 and S23 is repeated, when without next feature, terminates identification.
Further, the size marking mode of the essential characteristic cell cube of S3 identification, and searched for and known according to size marking mode
Know the process that library corresponds to reference model, includes the following steps:
S31. all sized objects of identified essential characteristic cell cube are obtained；
S32. size tangent vector, the size normal vector of sized objects are obtained；
S33. according to the size tangent vector of each size, each size of size normal vector calculated in essential characteristic cell cube
Notation methods；
S34. the correspondence reference model of knowledge base is searched for according to size marking mode.
Further, S6 carries out size relative positional relationship judgement two-by-two, the relative position to the size in size subset
Relationship is divided into three kinds: adjacent not containment relationship, adjacent complete containment relationship, non-conterminous complete containment relationship.
Further, S7 judges spatial position the constraint relationship, and the spatial position the constraint relationship is divided into three kinds: coordinate
Method size layout, chain method size layout, synthesis size layout.
Further, S10 obtains the variable quantity of model relative size layout after modification, includes the following steps:
S101. nearest size leading point seat is laid out where size layout dimension in set of dimensions from size before extracting modification
Mark；
S102. nearest size leading point coordinate is laid out from size in set of dimensions where size layout after obtaining modification；
S103. the linear distance between S101 and S102 two o'clock is calculated, which is model relative size layout change amount.
Further, S11 marks reference model knowledge base to the size of essential characteristic cell cube according to essential characteristic cell cube
It is adjusted, includes the following steps:
S111. the dimensional parameters D of first sized objects of essential characteristic cell cube is obtainedi；
S112. the default size numerical value D of the knowledge base reference model correspondingly-sized of the essential characteristic cell cube is obtainedj, ruler
Very little boundary line length dj；
S113. the extension line length d of entity size is calculated by the change type of knowledge basei, essential characteristic unit
The extension line of body reference model and the extension line transformational relation of essential characteristic cell cube are to be converted according to the following formula:
Wherein DiFor entity size, DjFor the size of corresponding reference model, djFor the extension line length of reference model,
Middle Dj、djNumerical value is default value；
S114. the extension line length according to acquired in S113 adjusts the extension line length of essential characteristic cell cube
It is whole.
Further, S12 variable quantity according to acquired in S10 is adjusted the size in S8 each size layout, including
Following steps:
S121. the scale coordinate position recorded after S8 is completed is extracted；
S122. model relative size layout change amount acquired in S10 is extracted；
S123. it to the scale coordinate position in each size layout, is moved along model relative size layout change amount.
The advantages of the present invention: the present invention marks reference model knowledge by establishing essential characteristic cell cube
Library；The identification of essential characteristic cell cube is carried out to the model before modification；The size marking mode of the essential characteristic cell cube of identification, and
The correspondence reference model of knowledge base is found according to size marking mode；After modification, mould is referred to according to essential characteristic cell cube mark
Type knowledge base is adjusted the size of essential characteristic cell cube, and position of the effective solution between size and model is unreasonable
Problem improves Variant Design efficiency, has good application value.
The present invention closes relative position between model progress set of dimensions division, classification of dimension set, size before passing through modification
The processing methods such as system's judgement, size layout identification, establish spatial position the constraint relationship between size, according to model phase after modification
Size layout change amount is adjusted the size in size layout, opposite position of the effective solution between size and size
Unreasonable problem is set, Variant Design efficiency is improved, there is good application value.
The current part Variant Design of Linear Mark method of adjustment effective solution towards Variant Design of the invention
Linear Mark confusion problem afterwards, entire size adjusting process are not necessarily to manual intervention, are size mark after part Variant Design
The adjustment of note provides automatic, efficient solution.
Detailed description of the invention
Fig. 1 is a kind of mark method of adjustment step block diagram towards Variant Design of the present invention；
Fig. 2 is the data content of S1 essential characteristic cell cube mark reference model knowledge base of the present invention；
Fig. 3 is the procedural block diagram of all essential characteristic cell cubes of S2 identification component part of the present invention；
Fig. 4 is the size marking mode of S3 identification essential characteristic cell cube of the present invention, and is searched for according to size marking mode
The procedural block diagram of the correspondence reference model of knowledge base；
Fig. 5 is the adjacent not containment relationship schematic diagram of size two-by-two in S6 size subset of the present invention；
Fig. 6 is the adjacent complete containment relationship schematic diagram of size two-by-two in S6 size subset of the present invention；
Fig. 7 is the non-conterminous complete containment relationship schematic diagram of size two-by-two in S6 size subset of the present invention；
Fig. 8 is the coordinate method size layout schematic diagram in the constraint relationship of the spatial position S7 of the present invention；
Fig. 9 is the chain method size layout schematic diagram in the constraint relationship of the spatial position S7 of the present invention；
Figure 10 is the synthesis size layout schematic diagram in the constraint relationship of the spatial position S7 of the present invention；
Figure 11 is the method and step block diagram that S10 of the present invention obtains the variable quantity that model relative size after modification is laid out；
Figure 12, which is S11 of the present invention, marks reference model knowledge base to essential characteristic cell cube according to essential characteristic cell cube
The procedural block diagram that size is adjusted；
Figure 13 is the method and step block diagram of size adjusting in S12 size layout of the present invention；
Figure 14 is certain physical model.
Specific embodiment
The content of the present invention will be further described below with reference to the accompanying drawings and embodiments, but is not limitation of the invention.
A kind of Linear Mark method of adjustment towards Variant Design of the present invention, step block diagram as shown in Figure 1, include with
Lower step:
S1: essential characteristic cell cube mark reference model knowledge base is established；
S2: all essential characteristic cell cubes of component part are identified；
S3: the size marking mode of the essential characteristic cell cube of identification, and knowledge base is found according to size marking mode
Corresponding reference model；
S4: to all sizes of model according to the different demarcation in locating mark face at several set of dimensions, wherein same level
For a set of dimensions；
S5: classification of dimension set is carried out according to the mask method of plane where size to set of dimensions, wherein label direction phase
It is all same size subset；
S6: size relative positional relationship two-by-two is carried out to the size in size subset and is judged；
S7: judging spatial position the constraint relationship, and all sizes are divided into several spatial position the constraint relationship collection
It closes, size layout is collectively referred to as behind the constraint relationship of spatial position；
S8: the size that each size is laid out is handled, eliminate location error, and record eliminate location error after it is each
Size marking position coordinates；
S9: model modification；
S10: the variable quantity of the relatively each size layout of model after modification is obtained；
S11: reference model knowledge base is marked according to feature unit body, the size of essential characteristic cell cube is adjusted；
S12: the variable quantity according to acquired in S10 is adjusted the size in S8 each size layout.
Further, the content of S1 essential characteristic cell cube mark reference model knowledge base includes:
S11. the various notation methods of essential characteristic cell cube；
S12. each reference model default size numerical value and extension line length；
S13. the extension line conversion relational expression of the extension line of reference model and entity.
Further, S2 identifies the process of all essential characteristic cell cubes of component part, includes the following steps:
S21. first feature of model is obtained；
S22. the point, line, surface parameter of feature is obtained；
S23. pass through the point, line, surface parameters relationship recognition unit body of feature；
S24. next feature is obtained, S22 and S23 is repeated, when without next feature, terminates identification.
As shown in Fig. 2, the content of S1 essential characteristic cell cube mark reference model knowledge base includes:
S11. the various notation methods of essential characteristic cell cube；
S12. each reference model default size numerical value and extension line length；
S13. the extension line conversion relational expression of the extension line of reference model and entity.
As shown in figure 3, the process of all essential characteristic cell cubes of S2 identification component part, includes the following steps:
S21. first feature of model is obtained；
S22. the point, line, surface parameter of feature is obtained；
S23. pass through the point, line, surface parameters relationship recognition unit body of feature；
S24. next feature is obtained, S22 and S23 is repeated, when without next feature, terminates identification.
As shown in figure 4, the size marking mode of the essential characteristic cell cube of S3 identification, and searched for according to size marking mode
Knowledge base corresponds to the process of reference model, includes the following steps:
S31. all sized objects of identified essential characteristic cell cube are obtained；
S32. size tangent vector, the size normal vector of sized objects are obtained；
S33. according to the size tangent vector of each size, each size of size normal vector calculated in essential characteristic cell cube
Notation methods；
S34. the correspondence reference model of knowledge base is searched for according to size marking mode.
As shown in Fig. 5,6,7, S6 carries out size relative positional relationship two-by-two to the size in size subset and judges, the phase
It is three kinds to position relation: adjacent not containment relationship, adjacent complete containment relationship, non-conterminous complete containment relationship schematic diagram.
As shown in Figure 8,9, 10, S7 judges spatial position the constraint relationship, and the spatial position the constraint relationship is divided into
Three kinds: coordinate method size layout, chain method size layout, synthesis size are laid out three kinds of layout relationship schematic diagrams.
As shown in figure 11, S10 obtains the variable quantity of model relative size layout after modification, includes the following steps:
S101. nearest size leading point seat is laid out where size layout dimension in set of dimensions from size before extracting modification
Mark；
S102. nearest size leading point coordinate is laid out from size in set of dimensions where size layout after obtaining modification；
S103. the linear distance between S101 and S102 two o'clock is calculated, which is model relative size layout change amount.
As shown in figure 12, S11 marks reference model knowledge base to essential characteristic cell cube according to essential characteristic cell cube
Size is adjusted, and is included the following steps:
S111. the dimensional parameters D of first sized objects of essential characteristic cell cube is obtainedi；
S112. the default size numerical value D of the knowledge base reference model correspondingly-sized of the essential characteristic cell cube is obtainedj, ruler
Very little boundary line length dj；
S113. the extension line length d of entity size is calculated by the change type of knowledge basei, essential characteristic unit
The extension line of body reference model and the extension line transformational relation of essential characteristic cell cube are to be converted according to the following formula:
Wherein DiFor entity size, DjFor the size of corresponding reference model, djFor the extension line length of reference model,
Middle Dj、djNumerical value is default value；
S114. the extension line length according to acquired in S113 adjusts the extension line length of essential characteristic cell cube
It is whole.
As shown in figure 13, S12 variable quantity according to acquired in S10 is adjusted the size in S8 each size layout,
Include the following steps:
S121. the scale coordinate position recorded after S8 is completed is extracted；
S122. model relative size layout change amount acquired in S10 is extracted；
S123. it to the scale coordinate position in each size layout, is moved along model relative size layout change amount.
It is illustrated below according to specific implementation step of Figure 14 institute's representation model to the used method of the present invention:
(1) essential characteristic cell cube mark reference model knowledge base is established；
(2) all essential characteristic cell cubes for identifying composition model show that model is two basic in Figure 14 by identification
Feature unit body, respectively cylindrical body and cone；
(3) the size marking mode of the essential characteristic cell cube identified, and knowledge base pair is searched for according to size marking mode
Answer reference model.For cone dimension D1, notation methods are label direction perpendicular to circular conical surface, with D1Notation methods search
Knowledge base corresponds to cone reference model.For cylinder dimensions D2、D3, cylinder dimensions D2Notation methods be label direction
Perpendicular to cylindrical surface, cylinder dimensions D3Notation methods be label direction be parallel to circular section, with D2、D3Notation methods search
Knowledge base Correspondent cy linder body reference model；
(4) set of dimensions division, D are carried out to model shown in Figure 141、D2For a set of dimensions, D3For a set of dimensions；
(5) classification of dimension set, D are carried out to set of dimensions in step (4)1、D2For a size subset, D3For a size subset；
(6) it carries out size relative positional relationship two-by-two to the size in size subset in step (5) to judge, D1、D2It is adjacent
Not containment relationship, D3Relative positional relationship is not present in place size subset；
(7) spatial position the constraint relationship is carried out to the relative positional relationship obtained in step (6) to judge, obtain D1、D2
For chain method size layout relationship；
(8) size that each size is laid out is handled, eliminates location error, makes D1、D2Dimension line is parallel, eliminates position
Error is set, and records size marking D1、D2Position coordinates；
(9) model modification；
(10) model is with respect to D after obtaining modification1、D2The variable quantity of place size layout, extracts size layout dimension before modification
Nearest size leading point coordinate is laid out in the set of dimensions of place from size, size is laid out in the set of dimensions of place from ruler after obtaining modification
The nearest size leading point coordinate of very little layout calculates modification front and back most from size layout according to obtained two leading point coordinates
Linear distance between close size leading point, the distance are the variable quantity of model relative size layout；
(11) reference model knowledge base is marked according to feature unit body to be adjusted the size of essential characteristic cell cube.It is first
The dimensional parameters of three sizes are first obtained, the reference in corresponding mark reference model knowledge base that extraction step (3) obtains later
Model default size numerical value and extension line length, according to conversion relational expressionPhysical model size circle is calculated
Line length is finally subject to the length to three dimension Ds of physical model1、D2、D3Extension line length be adjusted；
(12) size adjusting distributing adjustment, the dimension D that extraction step (8) is recorded finally are carried out1、D2Position coordinates, mention
Take model relative size layout change amount acquired in step (10), the dimension D recorded to step (8)1、D2Position coordinates,
It is moved along model relative size layout change amount, obtains and need to be adjusted to labeling position coordinate points, be labeled adjustment later.
Claims (9)
1. a kind of Linear Mark method of adjustment towards Variant Design, characterized in that include the following steps:
S1: essential characteristic cell cube mark reference model knowledge base is established；
S2: all essential characteristic cell cubes of component part are identified；
S3: the size marking mode of identification essential characteristic cell cube, and the corresponding of knowledge base is found according to size marking mode and is joined
Examine model；
S4: to all sizes of model according to the different demarcation in locating mark face at several set of dimensions, wherein same level is one
Set of dimensions；
S5: to the size in set of dimensions, classification of dimension set is carried out according to the label direction of plane where size, wherein mark side
To being mutually all same size subset；
S6: size relative positional relationship two-by-two is carried out to the size in size subset and is judged；
S7: judging spatial position the constraint relationship, and all sizes are divided into several spatial position the constraint relationship set, empty
Between size layout is collectively referred to as behind the constraint relationship of position；
S8: the size that each size is laid out is handled, and eliminates location error, and records each size after elimination location error
Labeling position coordinate；
S9: model modification；
S10: the variable quantity of the relatively each size layout of model after modification is obtained；
S11: reference model knowledge base is marked according to feature unit body, the size of essential characteristic cell cube is adjusted；
S12: the variable quantity according to acquired in S10 is adjusted the size in S8 each size layout.
2. the Linear Mark method of adjustment according to claim 1 towards Variant Design, characterized in that S1 is substantially special
Sign cell cube mark reference model knowledge base content include:
S11. the various notation methods of essential characteristic cell cube；
S12. each reference model default size numerical value and extension line length；
S13. the extension line conversion relational expression of the extension line of reference model and entity.
3. the Linear Mark method of adjustment according to claim 1 towards Variant Design, characterized in that S2 identification group
At the process of all essential characteristic cell cubes of part, include the following steps:
S21. first feature of model is obtained；
S22. the point, line, surface parameter of feature is obtained；
S23. pass through the point, line, surface parameters relationship recognition unit body of feature；
S24. next feature is obtained, S22 and S23 is repeated, when without next feature, terminates identification.
4. the Linear Mark method of adjustment according to claim 1 towards Variant Design, characterized in that S3 identifies base
The size marking mode of eigen cell cube, and the process that knowledge base corresponds to reference model is searched for according to size marking mode, it wraps
Include following steps:
S31. all sized objects of identified essential characteristic cell cube are obtained；
S32. size tangent vector, the size normal vector of sized objects are obtained；
S33. according to the size tangent vector of each size, each size of size normal vector calculated essential characteristic cell cube mark
Mode；
S34. the correspondence reference model of knowledge base is searched for according to size marking mode.
5. the Linear Mark method of adjustment according to claim 1 towards Variant Design, characterized in that S6 is to size
Size in subset carries out size relative positional relationship two-by-two and judges that the relative positional relationship is divided into three kinds: adjacent not contain
Relationship, adjacent complete containment relationship, non-conterminous complete containment relationship.
6. the Linear Mark method of adjustment according to claim 1 towards Variant Design, characterized in that S7 is to space
Position constraint relationship judged, the spatial position the constraint relationship is divided into three kinds: coordinate method size layout, chain method size cloth
Office, synthesis size layout.
7. the Linear Mark method of adjustment according to claim 1 towards Variant Design, characterized in that S10 is obtained
The variable quantity that model relative size is laid out after modification, includes the following steps:
S101. nearest size leading point coordinate is laid out from size in set of dimensions where size layout dimension before extracting modification；
S102. nearest size leading point coordinate is laid out from size in set of dimensions where size layout after obtaining modification；
S103. the linear distance between S101 and S102 two o'clock is calculated, which is model relative size layout change amount.
8. the Linear Mark method of adjustment according to claim 1 towards Variant Design, characterized in that S11 according to
Essential characteristic cell cube mark reference model knowledge base is adjusted the size of essential characteristic cell cube, includes the following steps:
S111. the dimensional parameters of first sized objects of essential characteristic cell cube are obtained；
S112. the default size numerical value of the knowledge base reference model correspondingly-sized of the essential characteristic cell cube is obtained, size circle
Line length；
S113. the extension line length of entity size is calculated by the change type of knowledge base, essential characteristic cell cube ginseng
The extension line for examining model and the extension line transformational relation of essential characteristic cell cube are to be converted according to the following formula:
Wherein、Numerical value is default value；
S114. the extension line length according to acquired in S113 is adjusted the extension line length of essential characteristic cell cube.
9. the Linear Mark method of adjustment according to claim 1 towards Variant Design, characterized in that S12 according to
Variable quantity acquired in S10 is adjusted the size in S8 each size layout, includes the following steps:
S121. the scale coordinate position recorded after S8 is completed is extracted；
S122. model relative size layout change amount acquired in S10 is extracted；
S123. it to the scale coordinate position in each size layout, is moved along model relative size layout change amount.
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| CN102568038A (en) * | 2011-12-28 | 2012-07-11 | 西北工业大学 | Method for translating dimensions on two-dimensional engineering drawing to three-dimensional CAD (computer aided design) model |
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| EP3006893A1 (en) * | 2014-10-10 | 2016-04-13 | Hand Held Products, Inc. | Methods for improving the accuracy of dimensioning-system measurements |
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