CN104050310A - Automatic assembling constraint generation method based on Catia - Google Patents
Automatic assembling constraint generation method based on Catia Download PDFInfo
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- CN104050310A CN104050310A CN201410065911.2A CN201410065911A CN104050310A CN 104050310 A CN104050310 A CN 104050310A CN 201410065911 A CN201410065911 A CN 201410065911A CN 104050310 A CN104050310 A CN 104050310A
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Abstract
The invention provides an automatic assembling constraint generation method based on Catia. Under an environment with a secondary development tool CAA (computer aided assembly) of the Catia, the method comprises the following steps of 1, automatic insertion of parts; 2, automatic acquisition of geometric part assembling elements; 3, automatic generation of a constraint among the parts through relevant functions according to the geometric part assembling elements and a constraint type among the parts so as to finish assembling of the parts. Under the secondary development tool CAA environment of a Catia platform, automatic assembling of the parts is realized by selecting the parts to be assembled, and the shortcomings of low efficiency, long assembling period and the like of the conventional manual assembling in an automobile coating production line are overcome; the automatic assembling constraint generation method is particularly suitable for assembling of a large batch of parts.
Description
Technical field
The present invention relates to field of three-dimension modeling, the assembly constraint that is specifically related to automobile coating production line parts generates field automatically.
Background technology
The assembling function that current Three-dimensional CAD Software provides, all to rely on designer completely to specify the assembling geometrical constraint between part to complete by hand assembling, computing machine can not replace operator automatically to assemble, deviser will constantly repeat dull work, do not meet the rationalization requirement of human engineering, and this method efficiency of assembling is low, can not meet the requirement of rapid Design.For large batch of parts, still allow user rely on the loaded down with trivial details restriction relation of manual interpolation, and at assembling spare part shape facility error situation, cannot need ressemble by timely replacement, this does not meet a large amount of assembly works in automobile coating production line completely.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of assembling process of simplifying is provided, handled easily, efficiency is higher, and reliability is higher, has certain intelligent method for the production of the automatic assembly constraint of line.The technical solution used in the present invention is:
A kind of automatic assembly constraint generation method based on Catia, under the environment of the secondary development tool CAA of Catia, adopts following step:
Step 1, the automatic insertion of parts;
Step 2, the automatic acquisition of parts assembling geometric element;
Step 3, according to the constrained type between parts assembling geometric element and parts, utilizes relevant function automatically to generate the constraint between parts, completes the assembling of parts.
Described step 1 specifically comprises: open the corresponding source document of production line ground in assigned catalogue with the function Open under interface CATIIniInteractiveSession; Obtain the tree directory of assembly by function G iveDocRoots; By function AddProduct, selected parts are inserted under assembly tree directory; And the three-dimensional model of selected parts is joined in original assembly;
Described step 2 specifically comprises: parts and production line ground are issued to these assembling geometric elements of issuing with function G etFinalObject automatic acquisition for the assembling geometric element assembling.
Further, assembling geometric element comprises the point, straight line and/or the plane that between parts, participate in assembling.
Further, in described step 3, specifically automatically generate constraint with function CreateConstraint.
The invention has the advantages that: this method is under the secondary development tool CAA of Catia platform environment, by the selection of part that needs are assembled, realize the automatic assembling of parts, solve the efficiency that in automobile coating production line, conventional manual is assembled low, the shortcomings such as assembly period is long, are especially applicable to the assembling of part in enormous quantities.
Brief description of the drawings
Fig. 1 is that parts of the present invention insert schematic diagram automatically.
Fig. 2 is parts assembling geometric element automatic acquisition schematic diagram of the present invention.
Fig. 3 is the assembling schematic diagram that completes parts of the present invention.
Fig. 4 is process flow diagram of the present invention.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
The present invention produces in Da Suo company of Three-dimensional CAD Software Catia(France) on platform, taking CAA (CAA is a kind of secondary development tool based on Catia platform) as developing instrument, under Visual Studio2005 development environment, the automatic assembly constraint of the one generation method of design, major function is to simplify assembling process, extract the assembling rule between part, complete automatic assembling function to improve Product Assembling Design efficiency.
The present embodiment is using production line ground as initial parts, and the control providing by CAA develops the part selection interface as Fig. 1 upper right corner, by the assembling of part in batches on this interface control production line in the upper right corner.At this, taking 3 parts as example, this interface has part 1,2,3 can select assembling.Directly click part 1,2 or 3 and can assemble it to production line ground.
The function of many practicalities is provided in CAA, by calling these functions, just can have realized concrete function.
Automatic assembly constraint generation method based on Catia proposed by the invention, under the environment of the secondary development tool CAA of Catia, has adopted following step to realize just:
Step 1, the automatic insertion of parts; Parts nulling part or parts;
Open the corresponding source document of production line ground in assigned catalogue with the function Open under interface CATIIniInteractiveSession; Obtain the tree directory of assembly by function G iveDocRoots; By function AddProduct by selected parts, as part 1(or part 2 or 3) be inserted under assembly tree directory; And it is inner that the three-dimensional model of selected parts is joined to original assembly (being production line ground) herein;
In Fig. 1, the bibliographic structure in left side has represented assembly tree directory, and the rectangle of plagioclase has represented original assembly, and the little rectangular parallelepiped of three-dimensional shape has represented selected part (being part 1 in Fig. 1).
Step 2, the automatic acquisition of parts assembling geometric element;
In this step, parts and production line ground are issued to these assembling geometric elements of issuing with function G etFinalObject automatic acquisition for the assembling geometric element assembling; Specific as follows:
The assembling geometric element of parts refers to the point that participates in assembling between part or parts, and straight line and/or plane etc., in the present embodiment, are chosen plane as assembling geometric element.
As shown in Figure 2, the left surface of part 1 and production line ground, frontal plane and three faces of bottom surface are issued to (publication), and by p0, p1, p2 in the face called after left side tree directory of part 1 and the issue of production line ground; These assembling geometric elements of issuing with function G etFinalObject automatic acquisition.
Step 3, according to the constrained type between parts assembling geometric element and parts, utilizes relevant function automatically to generate the constraint between parts, completes the assembling of parts.
Physical constraint type between parts has: be harmonious, contact, skew etc.In this example, between the frontal plane p1 of part 1 frontal plane p1 and bottom surface p2 and production line ground and bottom surface p2, restriction relation type is all catCstTypeOn for being harmonious, and the restriction relation type of the left surface p0 of part 1 and the left surface p0 of ground is catCstTypeDistance for being offset.
Then according to the constrained type between parts assembling geometric element and parts, specifically automatically generate constraint with function CreateConstraint.If constrained type is skew, generate when constraint need to binding occurrence is set and constraint direction is set with function SetCstAttrValue with function SetRealValue; If constrained type is for being harmonious or contacting, while generating constraint, need to constraint direction be set with function SetCstAttrValue.Determine after the restriction relation of first parts (being part 1 in this example) and production line ground, the parts that after this add can be with parts or the constraint taking production line ground as normalization of adding for the first time.
As Fig. 3 tree directory constraint 21～29, constraint 21～23 is the assembly constraint between part 1 and production line ground, constraint 24～26 is the assembly constraint between part 2 and production line ground, and constraint 27～29 is the assembly constraint between part 3 and production line ground, finally completes the assembling of parts.Determine after the restriction relation of all parts and production line ground, the restriction relation between part can by and production line ground between restriction relation indirectly reflect.
Claims (5)
1. the automatic assembly constraint generation method based on Catia, is characterized in that, under the environment of the secondary development tool CAA of Catia, adopts following step:
Step 1, the automatic insertion of parts;
Step 2, the automatic acquisition of parts assembling geometric element;
Step 3, according to the constrained type between parts assembling geometric element and parts, utilizes relevant function automatically to generate the constraint between parts, completes the assembling of parts.
2. the automatic assembly constraint generation method based on Catia as claimed in claim 1, is characterized in that, described step 1 specifically comprises:
Open the corresponding source document of production line ground in assigned catalogue with the function Open under interface CATIIniInteractiveSession; Obtain the tree directory of assembly by function G iveDocRoots; By function AddProduct, selected parts are inserted under assembly tree directory; And the three-dimensional model of selected parts is joined in original assembly.
3. the automatic assembly constraint generation method based on Catia as claimed in claim 2, is characterized in that, described step 2 specifically comprises:
Parts and production line ground are issued to these assembling geometric elements of issuing with function G etFinalObject automatic acquisition for the assembling geometric element assembling.
4. the automatic assembly constraint generation method based on Catia as claimed in claim 3, is characterized in that:
Assembling geometric element comprises the point, straight line and/or the plane that between parts, participate in assembling.
5. the automatic assembly constraint generation method based on Catia as described in claim 3 or 4, is characterized in that: in described step 3, specifically automatically generate constraint with function CreateConstraint.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410065911.2A CN104050310A (en) | 2014-02-25 | 2014-02-25 | Automatic assembling constraint generation method based on Catia |
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| CN201410065911.2A CN104050310A (en) | 2014-02-25 | 2014-02-25 | Automatic assembling constraint generation method based on Catia |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615839A (en) * | 2015-02-11 | 2015-05-13 | 华中科技大学无锡研究院 | Color identification-based automatic assembly constraint generating method |
| CN104992034A (en) * | 2015-07-24 | 2015-10-21 | 华中科技大学无锡研究院 | Rapid generation method of air duct for automobile painting workshop |
| CN107204043A (en) * | 2017-06-23 | 2017-09-26 | 艾凯克斯（嘉兴）信息科技有限公司 | A kind of distributed design approach of feature based mapping |
| CN108303961A (en) * | 2018-02-05 | 2018-07-20 | 艾凯克斯（嘉兴）信息科技有限公司 | A kind of debugging assembly method based on automatic assembling |
-
2014
- 2014-02-25 CN CN201410065911.2A patent/CN104050310A/en active Pending
Non-Patent Citations (4)
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| 丁志强等: ""基于CATIA参数化和智能化技术的模架自动装配"", 《制造业信息化》 * |
| 彭欢: ""基于VS Automation的CATIA二次开发技术研究"", 《电子机械工程》 * |
| 李维学等: ""基于CATIA V5二次开发的产品自动装配"", 《机械制造》 * |
| 陆皆炎等: ""基于CATIA二次开发的智能装配技术"", 《机械设计与研究》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615839A (en) * | 2015-02-11 | 2015-05-13 | 华中科技大学无锡研究院 | Color identification-based automatic assembly constraint generating method |
| CN104615839B (en) * | 2015-02-11 | 2018-04-13 | 华中科技大学无锡研究院 | A kind of automatic assembling constraint generation method based on colour recognition |
| CN104992034A (en) * | 2015-07-24 | 2015-10-21 | 华中科技大学无锡研究院 | Rapid generation method of air duct for automobile painting workshop |
| CN107204043A (en) * | 2017-06-23 | 2017-09-26 | 艾凯克斯（嘉兴）信息科技有限公司 | A kind of distributed design approach of feature based mapping |
| CN108303961A (en) * | 2018-02-05 | 2018-07-20 | 艾凯克斯（嘉兴）信息科技有限公司 | A kind of debugging assembly method based on automatic assembling |
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Application publication date: 20140917 |
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