CN109634637A - A kind of PDM system and BOM multi version CAD data disparity comparative approach - Google Patents
A kind of PDM system and BOM multi version CAD data disparity comparative approach Download PDFInfo
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- CN109634637A CN109634637A CN201811543854.9A CN201811543854A CN109634637A CN 109634637 A CN109634637 A CN 109634637A CN 201811543854 A CN201811543854 A CN 201811543854A CN 109634637 A CN109634637 A CN 109634637A
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Abstract
The present invention relates to comparing technical fields, provide a kind of PDM system and BOM multi version CAD data disparity comparative approach, the system includes disparity attribute tags, in the EBOM attribute of each components CAD data, the disparity attribute tags are made of the version number of CK-value value and CAD；CK-value value indicates compared with upper one edition CAD data whether each part geometry figure in current CAD version changes, and changed components and not changed components are marked using different CK-value values.The present invention in the CAD data of PDM system by adding disparity attribute tags, when the version i of CAD data and version j are compared, the CK-value value of each components into version j from version i only need to be read, and does logic and operation, you can learn that, compared to version i, the geometric figure of which components is changed in version j, without comparing one by one two-by-two, while simplifying comparison operation, data operation quantity is reduced, comparison time is shortened.
Description
Technical field
The present invention relates to comparing technical fields, provide a kind of PDM system and the multi version CAD data based on BOM
Disparity comparative approach.
Background technique
In manufacturing enterprise, BOM (BillofMaterial, bill of materials) file is the file of a very core.BOM
It is one and illustrates that product is made of which components type and size.
The activity of each department will use bill of materials, and production division will produce product, material according to bill of materials
It include type, quantity, the material of components in inventory, and geometric figure is stored in components CAD data, in product design
Cheng Zhong can constantly update the version of components CAD data and corresponding BOM, it is often necessary to which the geometric figure for detecting each components is
No to change, existing detection mode is that the CAD data of two version to be compared is directly compared, to judge each components
Whether change, if the geometric figure to multiple versions of a components is needed to be compared simultaneously, needs by right
It calls CAD data to be compared, there are trivial operations and time-consuming.
Summary of the invention
The present invention provides a kind of multi version CAD data disparity comparative approach based on BOM, it is intended to solve existing
When CAD data is compared, there are problems that data operation quantity is big and time-consuming.
To achieve the goals above, the present invention provides a kind of PDM system, the system comprises:
Disparity attribute tags, in the EBOM attribute of each components CAD data, the disparity attribute tags
It is made of the version number of CK-value value and CAD；
CK-value value indicates that compared with upper one edition CAD data, whether is each part geometry figure in current CAD version
It changes, changed components and not changed components is marked using different CK-value values
Note.
Further, geometric figure is the main spindle's based on components, position of centre of gravity, surface area values and bulking value four
Parameter is judged, if any one parameter changes in four parameters, determines that geometric figure changes.
Further, CK-value value identifies the changed components of geometric figure using logic digital " 0 ", using patrolling
It collects digital " 1 " and identifies the not changed components of geometric figure.
To achieve the goals above, the present invention provides a kind of, and the BOM multi version CAD data geometry based on PDM system is poor
Different comparative approach, described method includes following steps:
S1, the geometric figure for receiving user's transmission compare request, and to be compared two CAD editions are carried in the request
This, version i and version j, and the data of version j are new compared to the data of version i；
S2, it reads from the CK-value value of version i each part into version j；
If the CK-value value of S3, part from version i to version j is the mark that do not change, the components are determined
Geometric figure do not change from version i to version j, otherwise, it is determined that the geometric figure of the components is from version i to version j
It changes.
Further, CK-value value identifies the changed components of geometric figure using logic digital " 0 ", using patrolling
It collects digital " 1 " and identifies the not changed components of geometric figure.
Further, before step S1 further include:
S4, after every edition CAD data is issued, update the version in current CAD version in each part geometry difference attribute tags
This number.
Further, after step s4 further include:
After S5, the version number in current CAD version in each part geometry difference attribute tags update, by current version
This CAD data is compared with upper one edition CAD data, compared to the CAD data of last revision, if the geometric figure of part
Changed, then the CK-value value for exporting the part is 0, if part geometry figure does not change, output element
CK-value value be 1.
Further, judge whether the geometric figure of each components is changed from version i to version j, judgment method
It is specific as follows:
By from version i, into version j, the CK-value value of each part does logic and operation, if operation result is 1, then it represents that
The geometric figure of part does not change from version i to version j, if operation result is 0, then it represents that the geometric figure of part occurs
Variation.
The present invention in the CAD data of PDM system by adding disparity attribute tags, by the version i of CAD data
And version j only need to read the CK-value value of each components into version j from version i when being compared, and do logical AND fortune
It calculates, you can learn that, compared to version i, the geometric figure of which components is changed in version j, without comparing one by one two-by-two
It is right, while simplifying comparison operation, data operation quantity is reduced, shortens comparison time.
Detailed description of the invention
Fig. 1 is BOM multi version CAD data disparity comparative approach flow chart provided in an embodiment of the present invention.
Specific embodiment
A specific embodiment of the invention is made further detailed below against attached drawing by the description to optimum embodiment
Thin explanation.
PDM system in the present invention includes:
Disparity attribute tags, in the EBOM attribute of each components CAD data, the disparity attribute tags by
The version number of CK-value value and CAD composition；
CAD data of every publication, then the version number of CAD updates primary, generally uses counting form, if CAD data is sent out
The version number of CAD is n before cloth, then after CAD data publication, then the version number of CAD is (n+1)；CK-value value indicates and upper one
The CAD data of version is compared, and whether each part geometry figure in current CAD version changes, to changed components
It is identified, for example, being identified to the changed components of geometric figure using logic digital " 0 ", not to geometric figure
Changed components are identified using logic digital " 1 "；For example, the disparity attribute tags of part A are set as 0
(CAD_ITEM_Revision_ (n)), wherein " n " indicates n-th edition CAD data, " 1 " is CK-value value, indicates that components A exists
Geometric figure in (n-1) version and n-th edition is identical.
" geometric figure " in the embodiment of the present invention is the main spindle's based on components, position of centre of gravity, surface area values and
Bulking value is judged, if any one parameter changes in above-mentioned parameter, assert that the geometric figure of part becomes
Change.
Fig. 1 is BOM multi version CAD data disparity comparative approach flow chart provided in an embodiment of the present invention, this method
It is specific as follows:
S1, the geometric figure for receiving user's transmission compare request, and two CAD versions to be compared are carried in the request,
Version i and version j, and the data of version j are new compared to the data of version i；
S2, it reads from the CK-value value of version i each part into version j；
If the CK-value value of S3, part from version i to version j is the mark that do not change, the components are determined
Geometric figure do not change from version i to version j, otherwise, it is determined that the geometric figure of the components is from version i to version j
It changes.
In embodiments of the present invention, CK-value value identifies changed zero, geometric figure using logic digital " 0 "
Part identifies the not changed components of geometric figure using logic digital " 1 "；
In embodiments of the present invention, before step S1 further include:
S4, after every edition CAD data is issued, update the version in current CAD version in each part geometry difference attribute tags
This number；
In embodiments of the present invention, after step s4 further include:
After S5, the version number in current CAD version in each part geometry difference attribute tags update, by current version
This CAD data is compared with upper one edition CAD data, compared to the CAD data of last revision, if the geometric figure of part
Changed, then the CK-value value for exporting the part is 0, if part geometry figure does not change, output element
CK-value value is 1.
In embodiments of the present invention, judge whether the geometric figure of each components is changed from version i to version j,
Judgment method is specific as follows:
By from version i, into version j, the CK-value value of each part does logic and operation, if operation result is 1, then it represents that
The geometric figure of part does not change from version i to version j, if operation result is 0, then it represents that the geometric figure of part occurs
Variation.
The present invention in the CAD data of PDM system by adding disparity attribute tags, by the version i of CAD data
And version j only need to read the CK-value value of each components into version j from version i when being compared, and do logical AND fortune
It calculates, you can learn that, compared to version i, the geometric figure of which components is changed in version j, without comparing one by one two-by-two
It is right, while simplifying comparison operation, data operation quantity is reduced, shortens comparison time.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as using method concept and skill of the invention
The improvement for the various unsubstantialities that art scheme carries out, it is within the scope of the present invention.
Claims (8)
1. a kind of PDM system, which is characterized in that the system comprises:
Disparity attribute tags, in the EBOM attribute of each components CAD data, the disparity attribute tags by
The version number of CK-value value and CAD composition；
CK-value value indicates compared with upper one edition CAD data whether each part geometry figure in current CAD version occurs
Changed components and not changed components are marked using different CK-value values for variation.
2. PDM system as described in claim 1, which is characterized in that geometric figure is the main spindle's based on components, center of gravity position
Set, four parameters of surface area values and bulking value are judged, if any one parameter changes in four parameters,
Determine that geometric figure changes.
3. PDM system as described in claim 1, which is characterized in that CK-value value identifies geometric figure using logic digital " 0 "
Changed components identify the not changed components of geometric figure using logic digital " 1 ".
4. a kind of BOM multi version CAD data disparity ratio based on PDM system described in Claims 1-4 any claim
Compared with method, which is characterized in that described method includes following steps:
S1, the geometric figure for receiving user's transmission compare request, and two CAD versions to be compared, version are carried in the request
This i and version j, and the data of version j are new compared to the data of version i；
S2, it reads from the CK-value value of version i each part into version j；
If the CK-value value of S3, part from version i to version j is the mark that do not change, the several of the components are determined
What figure does not change from version i to version j, otherwise, it is determined that the geometric figure of the components occurs from version i to version j
Variation.
5. BOM multi version CAD data disparity comparative approach as claimed in claim 4, which is characterized in that CK-value value is adopted
The changed components of geometric figure are identified with logic digital " 0 ", are not become using logic digital " 1 " mark geometric figure
The components of change.
6. BOM multi version CAD data disparity comparative approach as claimed in claim 5, which is characterized in that before step S1
Further include:
S4, after every edition CAD data is issued, new version word is added in current CAD version in each part geometry difference attribute tags
Section.
7. BOM multi version CAD data disparity comparative approach as claimed in claim 6, which is characterized in that after step s4
Further include:
After S5, the version number field in current CAD version in each part geometry difference attribute tags are added, by current version
This CAD data is compared with upper one edition CAD data, compared to the CAD data of last revision, if the geometric figure of part
Changed, then the CK-value value for exporting the part is 0, if part geometry figure does not change, output element
CK-value value be 1.
8. BOM multi version CAD data disparity comparative approach as claimed in claim 5, which is characterized in that judge each components
Geometric figure whether changed from version i to version j, judgment method is specific as follows:
By from version i, into version j, the CK-value value of each part does logic and operation, if operation result is 1, then it represents that part
Geometric figure do not change from version i to version j, if operation result be 0, then it represents that the geometric figure of part is become
Change.
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| CN111626689A (en) * | 2020-04-21 | 2020-09-04 | 徐工集团工程机械股份有限公司 | Intelligent data algorithm based on product example |
| CN113568552A (en) * | 2021-07-30 | 2021-10-29 | 奇瑞汽车股份有限公司 | Method and device for displaying comparison result of data structure and computer storage medium |
| CN113722827A (en) * | 2021-08-31 | 2021-11-30 | 奇瑞汽车股份有限公司 | CAD data creating method and device and computer storage medium |
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