CN105975696A - Rule-based three-dimensional procedure size layout method - Google Patents
Rule-based three-dimensional procedure size layout method Download PDFInfo
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Abstract
The invention proposes a rule-based three-dimensional procedure size layout method. The method comprises the steps of performing size subset division and containment relationship judgment according to a characteristic of a three-dimensional procedure size by taking the three-dimensional procedure size in a three-dimensional procedure model as a research object; and then, performing automatic layout of the three-dimensional procedure size by applying an incremental size marking automatic layout method. According to the method, related three-dimensional size layout logic is determined, and the size subset division and the containment relationship judgment are carried out, so that an automatically generated three-dimensional procedure size position can conform to an operation habit of a technologist and the process planning efficiency of the technologist is improved; and the incremental size marking automatic layout method is used, so that the three-dimensional procedure size layout can be tidy and standard, the workload of the technologist is effectively reduced, and a technical basis is provided for visualization of the three-dimensional procedure model.
Description
Technical field
The present invention relates to the three-dimensional process dimension layout method in a kind of three-dimensional process design system, particularly a kind of based on
The three-dimensional process dimension layout method of rule.
Background technology
In three-dimensional process design system, owing to the course of processing of machine components is to be made up of multiple orderly operations,
Blank is from the first operation putting into processing, and before to the last forming part, every procedure can form a mid-module,
This mid-module is referred to as operation model.During generating three-dimensional operation model, the three-dimensional process dimension of automatic marking is past
Toward random placement, it is impossible to meet the layout requirements of size marking.
Document " engineering drawing size marking automatic layout algorithm and realization [J]. Aeronautics Computing Technique, 2010,40 (02): 73-
76 " a kind of size marking autoplacement implementation method is disclosed.With the horizontal size marks existed a large amount of in engineering drawing with vertical
Size marking is object of study, according to its feature, it is carried out classification of dimension set and sorts with containment relationship, on this basis,
Application increment type size marking automatic layout algorithm, it is achieved the autoplacement of horizontal size mark and vertical size marking.But this
Method is for two-dimensional layout, the two-dimensional being only applicable in same plane, and for three-dimensional dimension, same model meeting
Relate to multiple mark plane, and size marking planar representation is complicated；The position coordinates of three-dimensional dimension relate to three directions, mobile
It is difficult to operate.Thus document institute extracting method is difficult to the layout of three-dimensional process dimension.
Summary of the invention
For solving the problem that prior art exists, the present invention proposes a kind of rule-based three-dimensional process dimension layout side
Method, with the three-dimensional process dimension in three-dimensional operation model as object of study, according to its feature, carries out classification of dimension set and containing
Relation judges, on this basis, uses increment type size marking autoplacement method, it is achieved the automatic cloth of three-dimensional process dimension
Office.
The technical scheme is that
The rule-based three-dimensional process dimension layout method of described one, it is characterised in that: comprise the following steps:
Step 1: extract with the three-dimensional process dimension information in three-dimensional dimension mark operation model；Described three-dimensional operation chi
Very little information includes: the identification information of three-dimensional process dimension, the dimension text information of three-dimensional process dimension, the mark of three-dimensional process dimension
Note plane information, the association surface information of three-dimensional process dimension and the size marking direction of three-dimensional process dimension；
Step 2: three-dimensional process dimension subset division:
Step 2.1: according to the size marking direction of three-dimensional process dimension, the size that size marking direction is parallel to each other is returned
It is a class, obtains set of dimensions D={D1,D2,…Di... }, wherein DiRepresent the three-dimensional work that size marking direction is parallel to each other
Sequence size class；
Step 2.2: only retain two association faces at each three-dimensional process dimension apoplexy due to endogenous wind and be the three-dimensional process dimension of plane；
Step 2.3: by the three-dimensional process dimension of each three-dimensional process dimension apoplexy due to endogenous wind, according to the size value of three-dimensional process dimension
Arrange from big to small；
Step 3: each three-dimensional process dimension class is carried out three-dimensional process dimension pardon subset by following steps and draws
Point:
Step 3.1: for entering three-dimensional process dimension class D of this stepi, take DiIn first three-dimensional process dimension, and will
This size puts into set DikIn, k represents kth time circulation operation；At DiIn residue three-dimensional process dimension in find by described
Second three-dimensional process dimension that one three-dimensional process dimension contains entirely, then at DiIn residue three-dimensional process dimension in find by
The 3rd the three-dimensional process dimension that described second three-dimensional process dimension contains entirely, finds successively, until the three-dimensional work searched out
Sequence size is DiIn last three-dimensional process dimension maybe cannot find the three-dimensional process dimension position of full containing, three will found
Dimension process dimension is also sequentially placed into set DikIn；
Step 3.2: D will be gatheredikIn three-dimensional process dimension from DiMiddle deletion, if DiFor sky, then enter next step, if
It is not empty, then returns step 3.1 and carry out subsequent cycle operation；
Step 3.3: obtain three-dimensional process dimension class DiPardon subset { Di1,Di2,…Dik,…}；
Step 4: each three-dimensional process dimension class is proceeded as follows:
Step 4.1: in three-dimensional process dimension class DiPardon subset in find out containing three-dimensional process dimension number most
Subset DijBased on subset, DijIn three-dimensional process dimension be { dij1,dij2,…,dijn,…dijN, N is subset DijIn
Three-dimensional process dimension number；
Step 4.2: set up three-dimensional process dimension class DiConllinear subset { Di1’,Di2’,…Din’,…,DiN', by three-dimensional
Process dimension { dij1,dij2,…,dijn,…dijNConllinear subset { D is added to by subscript sequence number one_to_one correspondingi1’,Di2’,…
Din’,…,DiN' in；
Step 4.3: to three-dimensional process dimension class DiPardon subset in carry out as follows except its complementary subset of bases subset
Operation:
For subset DikIn a certain three-dimensional process dimension diktIf, diktWith all conllinear subset { Di1’,Di2’,…
Din ’,…,DiN' in three-dimensional process dimension all without containment relationship, then by three-dimensional process dimension diktAdd conllinear subset D toi1’
Or DiNIn ', if diktWith conllinear subset DinThree-dimensional process dimension in ' has containment relationship, then by three-dimensional process dimension diktAdd
To conllinear subset Di(n+1) ’In；Circulation carries out this operation, until three-dimensional process dimension class DiPardon subset in except bases subset
The all three-dimensional process dimensions of its complementary subset be added to conllinear subset till；
Step 5: each three-dimensional process dimension class is proceeded as follows:
By three-dimensional process dimension class DiAll three-dimensional process dimensions all move in same mark plane, according to conllinear
Collection { Di1 ’,Di2’,…Din’,…,DiN' subscript sequence number ecto-entad equidistant arrangement, the three-dimensional in the most same conllinear subset
Process dimension is in the position identical away from modal distance.
Further preferred version, the rule-based three-dimensional process dimension layout method of described one, it is characterised in that: step
In rapid 1, the identification information of three-dimensional process dimension includes that mark ID of three-dimensional process dimension and three-dimensional process dimension are at three-dimensional modeling
Ident value in software；The dimension text information of three-dimensional process dimension includes the three-dimensional Dimension Types of process dimension, size value, chi
Very little tolerance up and down, dimension text font size；The mark plane information of three-dimensional process dimension includes that three-dimensional process dimension is at mark
Placement location, mark plane origin and mark plane coordinate system in note plane；The association surface information of three-dimensional process dimension includes
The association face number of three-dimensional process dimension, mark ID in association face.
Beneficial effect
The invention has the beneficial effects as follows: determine relevant three-dimensional dimension placement logic, carry out classification of dimension set and containing
Relation judges, makes the three-dimensional process dimension position automatically generated meet the operating habit of technologist, improves technologist and enter
The efficiency of row technics institution；Use increment type size marking autoplacement method, make that three-dimensional process dimension layout is clean and tidy, specification,
Effectively reducing the workload of technologist, the visualization for three-dimensional operation model provides technical foundation.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 general technological system figure
Fig. 2 three-dimensional dimension model
Fig. 3 three-dimensional process dimension placement logic
Fig. 3 (a) half containment relationship
Fig. 3 (b) not containment relationship
The full containment relationship of Fig. 3 (c)
Fig. 3 (d) label direction is parallel to each other but not in the size of same mark plane
Fig. 3 (e) size delta formula is distributed
Operation model before Fig. 4 layout
Fig. 5 size layout effect
Detailed description of the invention
Embodiments of the invention are described below in detail, and the embodiment of description is exemplary, it is intended to be used for explaining the present invention,
And be not considered as limiting the invention.
Rule-based three-dimensional process dimension layout method in the present embodiment, comprises the following steps:
Step 1: extract the three-dimensional process dimension information in the operation model with three-dimensional dimension mark of certain procedure, as
Shown in Fig. 2；Described three-dimensional process dimension information includes: the identification information of three-dimensional process dimension, the size literary composition of three-dimensional process dimension
This information, the mark plane information of three-dimensional process dimension, the association surface information of three-dimensional process dimension and the chi of three-dimensional process dimension
Very little label direction；
The present embodiment three-dimensional process dimension mainly comprises following information:
PMI={id, tag, type, dim, upper_Dim, lower_Dim, font_Size, origin,
xformOrigin,xformOrientation,num_Geo,geo_ID1,geo_ID2,direction}
Wherein id is mark ID of three-dimensional process dimension, and tag is size Tag value under UG environment, and these information forms
The identification information of three-dimensional process dimension；
Type is Dimension Types, mainly includes the common chis such as vertical dimension, diameter dimension, Angular Dimension, parallel size
Very little type, dim is size value, and upper_Dim, lower_Dim are the upper and lower tolerance of size, and font_Size is dimension text word
Body size, the dimension text information of the three-dimensional process dimension of these information composition；
Origin is size placement location in mark plane, and xformOrigin is mark plane origin,
XformOrientation is mark plane coordinate system, the mark plane information of the three-dimensional process dimension of these information composition；
Um_Geo is the association face number of three-dimensional dimension, and geo_ID1, geo_ID2 are the mark in first, second association face
The association surface information of the three-dimensional process dimension of these information of ID composition；
Direction is size marking direction.
As shown in Figure 4, this operation model has 10 three-dimensional process dimension D={d1,d2,d3,d4,d5,d6,d7,d8,d9,
d10}。
Step 2: three-dimensional process dimension subset division: in order to carry out three-dimensional process dimension layout, given operation model and chi
After very little information, be first according to that label direction is the most parallel classifies to size, then each set of dimensions is filtered and
Sequence processes, and specifically comprises the following steps that
Step 2.1: according to the size marking direction of three-dimensional process dimension, the size that size marking direction is parallel to each other is returned
It is a class, obtains set of dimensions D={D1,D2,…Di... }, wherein DiRepresent the three-dimensional work that size marking direction is parallel to each other
Sequence size class；
Step 2.2: only process two association faces due to the present invention and be the size of plane, so at each three-dimensional operation chi
Very little apoplexy due to endogenous wind only retains two association faces and is the three-dimensional process dimension of plane；
Step 2.3: by the three-dimensional process dimension of each three-dimensional process dimension apoplexy due to endogenous wind, according to the size value of three-dimensional process dimension
Arrange from big to small.
In the present embodiment, three-dimensional process dimension subset division is:
D={D1,D2}
D1={ d5,d4,d3,d7,d2,d1}
D2={ d8,d9,d10,d6}。
Step 3: each three-dimensional process dimension class is carried out three-dimensional process dimension pardon subset by following steps and draws
Point.By judging the containment relationship between size, carrying out size pardon subset division, the rational deployment for size marking is laid
Basis；Containment relationship is shown in Fig. 3, and wherein (a) is half containment relationship, and (b) is not containment relationship, and (c) is full containment relationship.
Step 3.1: for entering three-dimensional process dimension class D of this stepi, take DiIn first three-dimensional process dimension, and will
This size puts into set DikIn, k represents kth time circulation operation；At DiIn residue three-dimensional process dimension in find by described
Second three-dimensional process dimension that one three-dimensional process dimension contains entirely, then at DiIn residue three-dimensional process dimension in find by
The 3rd the three-dimensional process dimension that described second three-dimensional process dimension contains entirely, finds successively, until the three-dimensional work searched out
Sequence size is DiIn last three-dimensional process dimension maybe cannot find the three-dimensional process dimension position of full containing, three will found
Dimension process dimension is also sequentially placed into set DikIn；
Step 3.2: D will be gatheredikIn three-dimensional process dimension from DiMiddle deletion, if DiFor sky, then enter next step, if
It is not empty, then returns step 3.1 and carry out subsequent cycle operation；
Step 3.3: obtain three-dimensional process dimension class DiPardon subset { Di1,Di2,…Dik,…}。
In the present embodiment, for three-dimensional process dimension class D1, find D1In first size d5The size contained is d4, continue
Continuous searching d4The size contained is d7, by that analogy, by D1It is divided into D1={ D11,D12,D13, wherein, D11={ d5,d4,d7,
D12={ d3,d2, D13={ d1}；In like manner D2It is divided into D2={ D21,D22,D23, wherein, D21={ d8,d9, D22={ d10, D23
={ d6}。
Step 4: each three-dimensional process dimension class is proceeded as follows:
Step 4.1: in three-dimensional process dimension class DiPardon subset in find out containing three-dimensional process dimension number most
Subset DijBased on subset, DijIn three-dimensional process dimension be { dij1,dij2,…,dijn,…dijN, N is subset DijIn
Three-dimensional process dimension number；Here in bases subset, the subscript sequence number of each three-dimensional process dimension represents last size institute layout
Position；
Step 4.2: set up three-dimensional process dimension class DiConllinear subset { Di1 ’,Di2’,…Din’,…,DiN', by three-dimensional
Process dimension { dij1,dij2,…,dijn,…dijNConllinear subset { D is added to by subscript sequence number one_to_one correspondingi1’,Di2’,…
Din’,…,DiN' in；Such as dij1It is put into Di1In ', dij2It is put into, Di2In ', dijnIt is put into DinIn '；
Step 4.3: to three-dimensional process dimension class DiPardon subset in carry out as follows except its complementary subset of bases subset
Operation:
For subset DikIn a certain three-dimensional process dimension diktIf, diktWith all conllinear subset { Di1’,Di2’,…
Din’,…,DiN ’Three-dimensional process dimension in } is all without containment relationship, then by three-dimensional process dimension diktAdd conllinear subset D toi1’
Or DiNIn ', if diktWith conllinear subset DinThree-dimensional process dimension in ' has containment relationship, then by three-dimensional process dimension diktAdd
To conllinear subset Di(n+1)In '；Circulation carries out this operation, until three-dimensional process dimension class DiPardon subset in except basis son
Till all three-dimensional process dimension of its complementary subset of collection is added to conllinear subset.
In the present embodiment, for three-dimensional process dimension class D1, bases subset is D11, by D11In size { d5,d4,d7One
One correspondence adds conllinear subset { D to11’,D12’,D13' in, obtain D11'={ d5, D12'={ d4, D13'={ d7, will be except base
Size outside plinth subset is added in conllinear subset according to pardon relation one by one, it is thus achieved that finally according to the subset of conllinear classification
D11'={ d5, D12'={ d4,d3, D13'={ d7,d2,d1, in like manner, D2'={ D21’,D22', wherein D11'={ d8, D12’
={ d9,d10,d6}。
Step 5: each three-dimensional process dimension class is proceeded as follows:
By three-dimensional process dimension class DiAll three-dimensional process dimensions all move in same mark plane, according to conllinear
Collection { Di1’,Di2’,…Din’,…,DiN' subscript sequence number ecto-entad equidistant arrangement, i.e. there are two sizes of containment relationship
Distance should be constant, the three-dimensional process dimension in the most same conllinear subset is in the position identical away from modal distance, depends on
Secondary guarantee is non-interference.The present embodiment is as shown in Figure 5.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art is without departing from the principle of the present invention and objective
In the case of above-described embodiment can be changed within the scope of the invention, revise, replace and modification.
Claims (2)
1. a rule-based three-dimensional process dimension layout method, it is characterised in that: comprise the following steps:
Step 1: extract with the three-dimensional process dimension information in three-dimensional dimension mark operation model；Described three-dimensional process dimension letter
Breath includes: the identification information of three-dimensional process dimension, the dimension text information of three-dimensional process dimension, and the mark of three-dimensional process dimension is put down
Surface information, the association surface information of three-dimensional process dimension and the size marking direction of three-dimensional process dimension；
Step 2: three-dimensional process dimension subset division:
Step 2.1: according to the size marking direction of three-dimensional process dimension, the size that size marking direction is parallel to each other is classified as one
Class, obtains set of dimensions D={D1,D2,…Di... }, wherein DiRepresent the three-dimensional operation chi that size marking direction is parallel to each other
Very little class；
Step 2.2: only retain two association faces at each three-dimensional process dimension apoplexy due to endogenous wind and be the three-dimensional process dimension of plane；
Step 2.3: by the three-dimensional process dimension of each three-dimensional process dimension apoplexy due to endogenous wind, according to the size value of three-dimensional process dimension from greatly
To minispread；
Step 3: each three-dimensional process dimension class is carried out three-dimensional process dimension pardon subset division by following steps:
Step 3.1: for entering three-dimensional process dimension class D of this stepi, take DiIn first three-dimensional process dimension, and by this chi
Very little putting into gathers DikIn, k represents kth time circulation operation；At DiIn residue three-dimensional process dimension in find by described first
Second three-dimensional process dimension that three-dimensional process dimension contains entirely, then at DiIn residue three-dimensional process dimension in find described
The 3rd the three-dimensional process dimension that second three-dimensional process dimension contains entirely, finds successively, until the three-dimensional operation chi searched out
Very little is DiIn last three-dimensional process dimension maybe cannot find the three-dimensional process dimension position of full containing, the three-dimensional work that will find
Sequence size is also sequentially placed into set DikIn；
Step 3.2: D will be gatheredikIn three-dimensional process dimension from DiMiddle deletion, if DiFor sky, then enter next step, if not
Sky, then return step 3.1 and carry out subsequent cycle operation；
Step 3.3: obtain three-dimensional process dimension class DiPardon subset { Di1,Di2,…Dik,…}；
Step 4: each three-dimensional process dimension class is proceeded as follows:
Step 4.1: in three-dimensional process dimension class DiPardon subset in find out the subset most containing three-dimensional process dimension number
DijBased on subset, DijIn three-dimensional process dimension be { dij1,dij2,…,dijn,…dijN, N is subset DijIn three-dimensional
Process dimension number；
Step 4.2: set up three-dimensional process dimension class DiConllinear subset { Di1’,Di2’,…Din’,…,DiN', by three-dimensional operation
Size { dij1,dij2,…,dijn,…dijNConllinear subset { D is added to by subscript sequence number one_to_one correspondingi1’,Di2’,…Din’,…,
DiN' in；
Step 4.3: to three-dimensional process dimension class DiPardon subset in proceed as follows except its complementary subset of bases subset:
For subset DikIn a certain three-dimensional process dimension diktIf, diktWith all conllinear subset { Di1’,Di2’,…Din’,…,
DiN' in three-dimensional process dimension all without containment relationship, then by three-dimensional process dimension diktAdd conllinear subset D toi1' or DiN’
In, if diktWith conllinear subset DinThree-dimensional process dimension in ' has containment relationship, then by three-dimensional process dimension diktAdd conllinear to
Subset Di(n+1)In '；Circulation carries out this operation, until three-dimensional process dimension class DiPardon subset in except its of bases subset
Till all three-dimensional process dimension of complementary subset is added to conllinear subset；
Step 5: each three-dimensional process dimension class is proceeded as follows:
By three-dimensional process dimension class DiAll three-dimensional process dimensions all move in same mark plane, according to conllinear subset
{Di1’,Di2’,…Din’,…,DiN' subscript sequence number ecto-entad equidistant arrangement, the three-dimensional work in the most same conllinear subset
Sequence size is in the position identical away from modal distance.
A kind of rule-based three-dimensional process dimension layout method, it is characterised in that: in step 1,
The identification information of three-dimensional process dimension includes that mark ID of three-dimensional process dimension and three-dimensional process dimension are in 3 d modeling software
Ident value；The dimension text information of three-dimensional process dimension include the three-dimensional Dimension Types of process dimension, size value, size upper
Lower tolerance, dimension text font size；The mark plane information of three-dimensional process dimension includes that three-dimensional process dimension is in mark plane
On placement location, mark plane origin and mark plane coordinate system；The association surface information of three-dimensional process dimension includes three-dimensional work
The association face number of sequence size, mark ID in association face.
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