CN103729516A - Three-dimensional technology inverted sequence modeling method and device - Google Patents
Three-dimensional technology inverted sequence modeling method and device Download PDFInfo
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Abstract
The invention discloses a three-dimensional technology inverted sequence modeling method and device. The method comprise the steps that a first process model of a first process is obtained; the first process model is updated through the process content of a second process according to a material-increasing mode, and a second process model is obtained; and the incidence relation between the first process model and the second process model is stored, and a three-dimensional technology model is obtained. According to the three-dimensional technology inverted sequence modeling method and device, the problem that in the prior art, when a process in three-dimensional design models or three-dimensional process models is changed, the three-dimensional process models need manual changing, changing of the three-dimensional process models can go wrong easily, efficiency is low, and accordingly the error rate of three-dimensional technology models is high is solved, when one three-dimensional process model changes, other process models in the three-dimensional technology models can change automatically along with the three-dimensional process model, three-dimensional technology model changing speed is high, and accuracy is high.
Description
Technical field
The present invention relates to three-dimensional data process field, in particular to a kind of backward modeling method and device of three-dimensional process.
Background technology
Along with Three-dimensional CAD Technology and MBD(Model Based Definition, based on the engineering definition of model) popularize, aviation, space flight, automobile, engineering machinery, the design department of the high-end equipment manufacture such as electronics is adopting the design means of full three-dimensional, three-dimensional design data has become the data source of product design data, the full three-dimensional model of design department issues and requires technique department must adopt corresponding technological means to solve the problem how to start technological design based on full three-dimensional model, manufacturing sector also must consider the how design based on three-dimensional, process data solves its manufacture process problem.
In the manufacturing process of part, machining is the most important means of production, instructs the mechanical processing technique design of machining also just to become very important technological design type.Mechanical processing technique design all launches take operation as unit, at the process chart take two-dimentional in main process design method, the description of technique, operation is all the figure of word or two dimension, operation in three-dimensional process design is described all based on three-dimensional, and how the means Rapid Establishment operation model based on three-dimensional just becomes the key issue that three-dimensional mechanical processing technique designs.
Based on the problems referred to above, ASME has started research and the formulation work about MBD standard under the assistance in Boeing in 1997, and in 2003, be approved as the definition standard of engineering goods engineering model, be the standard using three-dimensional entity model as unique manufacture foundation.MBD is the method body that an integrated three-dimensional entity model of use carrys out expressed intact Product Definition information, its specified in more detail the mark rule of product size, tolerance and the expression of technique information in three-dimensional entity model.The dominant ideas of MBD just simply by the message reflection of two-dimentional drawing in three-dimensional data, but make full use of the expressive force that three-dimensional model possesses, go to explore the design information expression way of being convenient to user's understanding and having more efficiency, and MBD has changed traditional method of describing geometry information with three-dimensional model, and define size with Two-dimensional Engineering drawing, the substep Products Digital define method of tolerance and technique information, meanwhile, MBD makes three-dimensional model as the unique foundation in manufacturing process, changed tradition take engineering drawing as main, take three-dimensional entity model as auxiliary manufacture method.
In addition, about the national standard of three-dimensional engineering mark and three-dimensional manufacturing information: GBT24734.1-2009 technical products file digitizing product definition data general rule, in 2010, started issuing and implementation, the enforcement of this standard will contribute to promote the use in technique and manufacture process of the standardization of three-dimensional design data and three-dimensional design data.
For solving the problem of three-dimensional process design, a lot of enterprises are all in the trial of being correlated with, and the emphasis of trial is all to carry out technological design based on commercial Three-dimensional CAD Software.
But, commercial Three-dimensional CAD Software is that Design-Oriented personnel carry out Functional Design and exploitation, can not meet technologist's technological design demand, the Three Dimensional Design Model that technologist can not utilize designer to provide, the Three Dimensional Design Model that technologist need to provide according to designer re-establishes operation model, and when design a model change or a certain operation model change, follow-up operation model all needs manual change, easily make mistakes, efficiency is also very low.
While changing for the procedure in Three Dimensional Design Model in prior art or three-dimensional operation model, three-dimensional operation model all needs manual change, thereby the change of three-dimensional operation model easily makes mistakes and the low high problem of three-dimensional process model error rate that causes of efficiency, not yet proposes at present effective solution.
Summary of the invention
While changing for the procedure in Three Dimensional Design Model in correlation technique or three-dimensional operation model, three-dimensional operation model all needs manual change, thereby the change of three-dimensional operation model easily makes mistakes and the low high problem of three-dimensional process model error rate that causes of efficiency, effective solution is not yet proposed at present, for this reason, fundamental purpose of the present invention is to provide a kind of backward modeling method and device of three-dimensional process, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of backward modeling method of three-dimensional process, the method comprises: the first operation model that obtains the first operation; According to increasing material mode, use the operation content update first operation model of the second operation to obtain the second operation model; The incidence relation of preserving between the first operation model and the second operation model obtains three-dimensional process model.
Further, the step of using the operation content update first operation model of the second operation to obtain the second operation model comprises: create the second operation; Using the first operation model as source model; The first attribute data in extraction source model; Use operation content modification the first attribute data to obtain the second attribute data; Use the second attribute data to upgrade source model and obtain the second operation model.
Further, the step of using operation content modification the first attribute data to obtain the second attribute data comprises: obtain the relational expression between the first operation and the parts of the second operation; By relational expression, operation content and the first attribute data are carried out to working procedure feature and calculate the second attribute data.
Further, preserving the step that incidence relation between the first operation model and the second operation model obtains three-dimensional process model comprises: the first sign and the modification number of times that in the second operation model, record source model; Corresponding relation between the first operation and the parts of the second operation is preserved into the second operation model; The second sign of the second operation model is preserved into associated relation table; Preserve source model, the second operation model, incidence relation and incidence relation table, obtain three-dimensional process model.
Further, the first operation is that the step of obtaining the first operation model of the first operation comprises: the Three Dimensional Design Model that reads the destination object prestoring at last procedure in the process of destination object processing; Using Three Dimensional Design Model as the first operation model.
To achieve these goals, according to a further aspect in the invention, provide a kind of backward model building device of three-dimensional process, this device comprises: acquisition module, for obtaining the first operation model of the first operation; Update module, for being used the operation content update first operation model of the second operation to obtain the second operation model according to increasing material mode; Preserve module, for the incidence relation of preserving between the first operation model and the second operation model, obtain three-dimensional process model.
Further, update module comprises: the first creation module, for creating the second operation; Determination module, for using the first operation model as source model; The first extraction module, for the first attribute data of extraction source model; Modified module, for being used operation content modification the first attribute data to obtain the second attribute data; Update module, obtains the second operation model for using the second attribute data to upgrade source model.
Further, modified module comprises: Relation acquisition module, for obtaining the relational expression between the first operation and the parts of the second operation; Computing module, calculates the second attribute data for operation content and the first attribute data being carried out to working procedure feature by relational expression.
Further, preserve module and comprise: the first logging modle, for recording the first sign of source model and revise number of times in the second operation model; The first son is preserved module, for the corresponding relation between the first operation and the parts of the second operation is preserved into the second operation model; The second son is preserved module, for the second sign of the second operation model is preserved into associated relation table; The 3rd son is preserved module, for preserving source model, the second operation model, incidence relation and incidence relation table, obtains three-dimensional process model.
Further, the first operation is that acquisition module comprises at last procedure in the process of destination object processing: read module, for reading the Three Dimensional Design Model of the destination object prestoring; Model acquisition module, for using Three Dimensional Design Model as the first operation model.
Adopt the present invention, after obtaining the first operation model of the first operation, according to increasing material mode, use the operation content update first operation model of the second operation to obtain the second operation model, the incidence relation of then preserving between the first operation model and the second operation model obtains three-dimensional process model.The three-dimensional process model obtaining by such scheme, because the second operation model is to obtain on the basis of the first operation model, and the incidence relation of in store two operation models in three-dimensional process model, a procedure in three-dimensional process model changes, the operation model with the operation model changing with incidence relation also can change thereupon, when having solved a procedure in Three Dimensional Design Model in prior art or three-dimensional operation model and having changed, three-dimensional operation model all needs manual change, thereby the change of three-dimensional operation model easily makes mistakes and the low high problem of three-dimensional process model error rate that causes of efficiency, while having realized the change when one of them three-dimensional operation model, other operation models in three-dimensional process model all can automatically change thereupon, the fast accuracy rate of change speed of three-dimensional process model is high.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the structural representation of the backward model building device of the three-dimensional process of the embodiment of the present invention; And
Fig. 2 is according to the process flow diagram of the backward modeling method of the three-dimensional process of the embodiment of the present invention.
Embodiment
First, the part noun or the term that in the process that the embodiment of the present invention is described, occur are applicable to description below:
Technique: make various starting material, semi-manufacture become the Method and Process of product.
Technological process: change shape, size, relative position or the character etc. of producing object, become finished product or half-finished process.Technological process is comprised of multiple operations, and the sequencing of operation is representing the sequencing of manufacturing.
Operation: one or one group of workman, in a place of working to that a part of technological process same or that several workpiece are completed continuously simultaneously.The unit of operation is " road ", and a procedure refers to an operation exactly.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first " in instructions of the present invention and claims and above-mentioned accompanying drawing, " second " etc. are for distinguishing similar object, and needn't be used for describing specific order or precedence.The data that should be appreciated that such use suitably can exchanged in situation, so as embodiments of the invention described herein can with except diagram here or describe those order enforcement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, for example, those steps or unit that process, method, system, product or the equipment that has comprised series of steps or unit is not necessarily limited to clearly list, but can comprise clearly do not list or for these processes, method, product or equipment intrinsic other step or unit.
Fig. 1 is according to the structural representation of the backward model building device of the three-dimensional process of the embodiment of the present invention.As shown in Figure 1, this device can comprise: acquisition module 10, for obtaining the first operation model of the first operation; Update module 30, for being used the operation content update first operation model of the second operation to obtain the second operation model according to increasing material mode; Preserve module 50, for the incidence relation of preserving between the first operation model and the second operation model, obtain three-dimensional process model.
Adopt the present invention, after acquisition module obtains the first operation model of the first operation, update module is used the operation content update first operation model of the second operation to obtain the second operation model according to increasing material mode, then preserves the incidence relation that module preserves between the first operation model and the second operation model and obtains three-dimensional process model.The three-dimensional process model obtaining by such scheme, because the second operation model is to obtain on the basis of the first operation model, and the incidence relation of in store two operation models in three-dimensional process model, a procedure in three-dimensional process model changes, the operation model with the operation model changing with incidence relation also can change thereupon, when having solved a procedure in Three Dimensional Design Model in prior art or three-dimensional operation model and having changed, three-dimensional operation model all needs manual change, thereby the change of three-dimensional operation model easily makes mistakes and the low high problem of three-dimensional process model error rate that causes of efficiency, while having realized the change when one of them three-dimensional operation model, other operation models in three-dimensional process model all can automatically change thereupon, the fast accuracy rate of change speed of three-dimensional process model is high.
In the above embodiment of the present invention, update module can comprise: the first creation module, for creating the second operation; Determination module, for using the first operation model as source model; The first extraction module, for the first attribute data of extraction source model; Modified module, for being used operation content modification the first attribute data to obtain the second attribute data; Update module, obtains the second operation model for using the second attribute data to upgrade source model.
According to the abovementioned embodiments of the present invention, modified module can comprise: Relation acquisition module, for obtaining the relational expression between the first operation and the parts of the second operation; Computing module, calculates the second attribute data for operation content and the first attribute data being carried out to working procedure feature by relational expression.
In the above embodiment of the present invention, preserving module can comprise: the first logging modle, for recording the first sign of source model and revise number of times in the second operation model; The first son is preserved module, for the corresponding relation between the first operation and the parts of the second operation is preserved into the second operation model; The second son is preserved module, for the second sign of the second operation model is preserved into associated relation table; The 3rd son is preserved module, for preserving source model, the second operation model, incidence relation and incidence relation table, obtains three-dimensional process model.
According to the abovementioned embodiments of the present invention, the first operation is that acquisition module comprises at last procedure in the process of destination object processing: read module, for reading the Three Dimensional Design Model of the destination object prestoring; Model acquisition module, for using Three Dimensional Design Model as the first operation model; The second operation is the manufacturing procedure carry out the first operation in to the process of destination object processing before, and modified module comprises: the first sub-modified module, and for using operation content modification the first attribute data to obtain the second attribute data according to increasing material mode.
Particularly, destination object can be blank, can be the newly-built three-dimensional process model of this blank (newly-built three-dimensional process model is empty in this embodiment), the Three Dimensional Design Model of the default part providing is provided in three-dimensional processing technology, this model can be referred to as to part model.The first operation is last one manufacturing procedure of carrying out in the process of part processing in this embodiment.After the establishment that completes three-dimensional process model, can blank be processed into finished product (as: part) according to this model.
In three-dimensional processing technology before the first operation newly-built the second operation, edit the second attribute data of the second operation, wherein the second attribute data comprises: the operation title of the second operation, operation content, equipment, frock, man-hour etc. data, set up the second operation model of this operation and the incidence relation of part model, concrete implementation procedure is as follows:
(1) copying part model is the second initial operation model.
(2) in the second initial operation model, record the first sign of modification number of times in the first operation model and the first operation model.Wherein, the modification number of times in the first operation model can be the number of times of this operation model being modified for representing, this modification number of times can represent with constant.
(3) in the second initial operation model, set up mapping table, the corresponding relation between record the second operation model and the parts of the first operation model.Wherein, parts comprise: assembling, part, body.
After the incidence relation of setting up between the first operation model and the second operation model, the first operation model, the second operation model, incidence relation are preserved in the relation table of three-dimensional process model, and the second sign of the second operation is preserved in relation table.Wherein, relation table can be relation table newly-built when newly-built three-dimensional process model, and this relation table is for recording sequencing and relation between operation model associated in this three-dimensional process model.
Wherein, designer can complete the design to finished product by Three-dimensional CAD Software, and the result having designed can save as Three Dimensional Design Model, and three-dimensional process model comprises destination object (being blank) is processed into finished product (finished product can be part)
The data of each job sequence (being operation) of process.As, the first operation data are the data that destination object are processed into the first operation in the process of finished product, the first operation data comprise multiple the first attribute datas, these attribute datas can also comprise each feature to part processing, as the attribute data of axle, face, hole, groove, more specifically, attribute data can comprise the length of face and wide data.
Each attribute data in above-described embodiment all can have a unique Property ID, can be by setting up associated realization the between the ID of the first attribute data and the ID of the second attribute data by the incidence relation between the first operation and the parts of the second operation.
Particularly, can directly from three Dimensional CAD Design software, read the Three Dimensional Design Model that designer provides, and set it as last procedure data of three-dimensional operation model, each attribute in this Three Dimensional Design Model has a unique Property ID as sign, on the basis of last procedure (being the first operation in the present embodiment) of three-dimensional operation model, mode by " increasing material " modeling is set up the three-dimensional operation model of last procedure, the operation attribute now increasing has new Property ID, and by the incidence relation between the record sign of attribute of the second operation and the sign of the attribute of the first operation, reciprocal according to this, until be built to first working procedure.In addition, can all set up a three-dimensional operation model to the every procedure in three-dimensional process model.
In another embodiment provided by the invention, the first operation be to destination object (as, part) procedure of centre in the process of processing, before the first operation, insert the second operation, also be, the second operation is the manufacturing procedure carry out the first operation in to the process of destination object processing before, set up the incidence relation between the first operation model and the second operation model, and by the first operation model and the second operation model and between incidence relation preserve in the relation table of above-described embodiment.Particularly, can realize by the following method:
(1) copy the second initial operation model (being referred to as object module) that the first operation model (being referred to as source model) is the second operation.
(2) in object module, record in source model for representing that it revises the constant of number of times, record the unique identification of source model.
(3) in object module, the corresponding relation between assembling, part, body before copying between record object model and source model and after copying.
(4) current operation sign is inserted in the relation table that records sequencing and relation between operation model associated in this technique in three-dimensional processing technology.
By above-mentioned steps, set up the incidence relation between the first operation model and the second operation model.After setting up the first operation model and the second operation model, according to increasing material mode, use operation content modification first attribute data of the second operation to obtain the second attribute data.
Particularly, from the first operation model, extract the first attribute data, obtain the relational expression between the first operation and the parts of the second operation, according to the mode that increases material, by relational expression, operation content and the first attribute data are carried out to working procedure feature and calculate the second attribute data.
Particularly, edit second attribute data such as operation title, operation content, equipment, frock, man-hour of the second operation, according to the processing content of the second operation, according to " increasing material " mode, revise the second initial operation model (i.e. the first operation model) and obtain the second operation model.
For example, the operation content of the second operation is: an axle is become to φ 20 by φ 22 cars, now the diameter of the operation model axis of the second operation is that φ 20(is using the first operation model as source model in this embodiment, copy the first operation model as the second initial operation model), based on the first operation model, setting up the second operation model, is exactly, on the basis of φ 20, axle " is increased to material " to φ 22.In this embodiment, the relational expression between the first operation and the parts of the second operation is the calculating formula between φ 20 and φ 22, and the relational expression between the parts (as: axle) of the first operation and the second operation is above-mentioned increasing material formula.According to above-mentioned increasing material formula, operation content and the first attribute data are calculated, adjust respectively the data such as equipment, frock and man-hour in the first attribute data and obtain the second attribute data.Use the second attribute data to upgrade the first operation model and obtain the second operation model.
Particularly, above-described embodiment is the process that backward is carried out operation design and modeling, select in this embodiment the reason of " increasing material " modeling to be: a part is to adopt the mode of " except material " to be processed into final part by blank according to the sequencing of operation, therefore in backward Process Planning, preceding working procedure increases material exactly with respect to later process.
The three-dimensional process model of setting up by the above embodiment of the present invention, when deleting operation model, all the operation sign in the relation table of sequencing and relation between operation model associated in this technique recording in three-dimensional processing technology to be deleted, in addition also have following several situations:
(1) delete first road or last procedure model: according to first working procedure or last procedure model, be that source model or object module are determined concrete behavior, if first working procedure model is source model, by the modification number of times constant of the relevant operation model of deleting recording in a procedure model after this operation, the unique identification of model, the corresponding relation between parts (as assembling, part, body) etc. is disposed; If first working procedure model is object module, this operation model is deleted.
(2) delete middle operation model: according to the relation table of sequencing between operation model associated in this technique recording in three-dimensional processing technology, this operation model operation model in record this operation model before the modification number of times constant of operation model, the unique identification of model, records operation and the afterwards corresponding relation between operation model inner part (as assembling, part, body) before.
(3) when revising operation model, by the relation table in three-dimensional processing technology, can find the operation model of associated this operation model, according to the corresponding relation of the parts (as assembling, part, body) that record in the modification result of this operation model and associated operation model, corresponding assembling, part, body are also made to corresponding modification; Above-mentioned modification, more new element can be propagated between all process steps, realize operation model modification after associated operation model automatically change.
The three-dimensional process model of setting up by the above embodiment of the present invention, when inserting operation model, can be used the method for setting up operation model in above-described embodiment to insert new operation model.
Particularly, when inserting operation model, there is following several situation: before first working procedure, insert: the new operation model inserting of former first working procedure model interaction, concrete operations can realize according to the method for above-described embodiment; Before other operations, insert, for example, have 1,2,3 procedures, while inserting before 2 operations: the operation model of new operation model interaction 2 procedures that insert; According to the mapping table of record in 2 procedure models and assembling, part and the body of 1 procedure model and newly insert operation model and the mapping table of assembling, part and the body of 1 procedure model, record and the newly mapping table of assembling, part and the body of insertion operation model again in 2 procedure models, newly insert the unique identification of operation model and revise number of times constant.
Wherein, modification number of times in above-described embodiment is mainly used in judging whether source model is modified: this after source model is modified in source model is revised number of times and can be increased progressively, by the source model that relatively just can judge generating the modification number of times recording in the modification number of times of source model in this object module moment and current source model recording in object module, whether be modified, when source model is revised, object module also will be followed modification.Operation sign is the unique identification of this operation, and finding associated model is by a relation table, has recorded with source and target operation and be designated the relation (as source operation sign, target operation sign) between the operation of key word in this relation table; After a certain operation is deleted, the information of relevant these operations of other local records, as operation sign, the constant of revising number of times certainly will be cleaned fall, otherwise can cause confusion.
Fig. 2 is that the method comprises the steps: as shown in Figure 2 according to the process flow diagram of the backward modeling method of the three-dimensional process of the embodiment of the present invention
Step S202, obtains the first operation model of the first operation.
Step S204, is used the operation content update first operation model of the second operation to obtain the second operation model.
Step S206, the incidence relation of preserving between the first operation model and the second operation model obtains three-dimensional process model.
Adopt the present invention, after obtaining the first operation model of the first operation, use the operation content update first operation model of the second operation to obtain the second operation model, the incidence relation of then preserving between the first operation model and the second operation model obtains three-dimensional process model.The three-dimensional process model obtaining by such scheme, because the second operation model is to obtain on the basis of the first operation model, and the incidence relation of in store two operation models in three-dimensional process model, a procedure in three-dimensional process model changes, the operation model with the operation model changing with incidence relation also can change thereupon, when having solved a procedure in Three Dimensional Design Model in prior art or three-dimensional operation model and having changed, three-dimensional operation model all needs manual change, thereby the change of three-dimensional operation model easily makes mistakes and the low high problem of three-dimensional process model error rate that causes of efficiency, while having realized the change when one of them three-dimensional operation model, other operation models in three-dimensional process model all can automatically change thereupon, the fast accuracy rate of change speed of three-dimensional process model is high.
According to the abovementioned embodiments of the present invention, the step of using the operation content update first operation model of the second operation to obtain the second operation model can comprise: create the second operation; Using the first operation model as source model; The first attribute data in extraction source model; Use operation content modification the first attribute data to obtain the second attribute data; Use the second attribute data to upgrade source model and obtain the second operation model.
Particularly, the step of using operation content modification the first attribute data to obtain the second attribute data can comprise: obtain the relational expression between the first operation and the parts of the second operation; By relational expression, operation content and the first attribute data are carried out to working procedure feature and calculate the second attribute data.
In the above embodiment of the present invention, the step that the incidence relation between preservation the first operation model and the second operation model obtains three-dimensional process model comprises: in the second operation model, record the first sign of source model and revise number of times; Corresponding relation between the first operation and the parts of the second operation is preserved into the second operation model; The second sign of the second operation model is preserved into associated relation table; Preserve source model, the second operation model, incidence relation and incidence relation table, obtain three-dimensional process model.
According to the abovementioned embodiments of the present invention, the first operation is that the step of obtaining the first operation model of the first operation can comprise: the Three Dimensional Design Model that reads the destination object prestoring at last procedure in the process of destination object processing; Using Three Dimensional Design Model as the first operation model.
In the above embodiment of the present invention, the second operation is the manufacturing procedure carry out the first operation in to the process of destination object processing before, and the step of using operation content modification the first attribute data to obtain the second attribute data can comprise: according to increasing material mode, use operation content modification the first attribute data to obtain the second attribute data.
Particularly, destination object can be blank, can be the newly-built three-dimensional process model of this blank (newly-built three-dimensional process model is empty in this embodiment), the Three Dimensional Design Model of the default part providing is provided in three-dimensional processing technology, this model can be referred to as to part model.The first operation is last one manufacturing procedure of carrying out in the process of part processing in this embodiment.After the establishment that completes three-dimensional process model, can blank be processed into finished product (as: part) according to this model.
In three-dimensional processing technology before the first operation newly-built the second operation, edit the second attribute data of the second operation, wherein the second attribute data comprises: the operation title of the second operation, operation content, equipment, frock, man-hour etc. data, set up the second operation model of this operation and the incidence relation of part model, concrete implementation procedure is as follows:
(1) copying part model is the second initial operation model.
(2) in the second initial operation model, record the first sign of modification number of times in the first operation model and the first operation model.Wherein, the modification number of times in the first operation model can be the number of times of this operation model being modified for representing, this modification number of times can represent with constant.
(3) in the second initial operation model, set up mapping table, the corresponding relation between record the second operation model and the parts of the first operation model.Wherein, parts comprise: assembling, part, body.
After the incidence relation of setting up between the first operation model and the second operation model, the first operation model, the second operation model, incidence relation are preserved in the relation table of three-dimensional process model, and the second sign of the second operation is preserved in relation table.Wherein, relation table can be relation table newly-built when newly-built three-dimensional process model, and this relation table is for recording sequencing and relation between operation model associated in this three-dimensional process model.
Wherein, designer can complete the design to finished product by Three-dimensional CAD Software, the result having designed can save as Three Dimensional Design Model, and three-dimensional process model comprises the data that destination object (being blank) are processed into each job sequence (being operation) of the process of finished product (finished product can be part).As, the first operation data are the data that destination object are processed into the first operation in the process of finished product, the first operation data comprise multiple the first attribute datas, these attribute datas can also comprise each feature to part processing, as the attribute data of axle, face, hole, groove, more specifically, attribute data can comprise the length of face and wide data.
Each attribute data in above-described embodiment all can have a unique Property ID, can be by setting up associated realization the between the ID of the first attribute data and the ID of the second attribute data by the incidence relation between the first operation and the parts of the second operation.
Particularly, can directly from three Dimensional CAD Design software, read the Three Dimensional Design Model that designer provides, and set it as last procedure data of three-dimensional operation model, each attribute in this Three Dimensional Design Model has a unique Property ID as sign, on the basis of last procedure (being the first operation in the present embodiment) of three-dimensional operation model, mode by " increasing material " modeling is set up the three-dimensional operation model of last procedure, the operation attribute now increasing has new Property ID, and by the incidence relation between the record sign of attribute of the second operation and the sign of the attribute of the first operation, reciprocal according to this, until be built to first working procedure.In addition, can all set up a three-dimensional operation model to the every procedure in three-dimensional process model.
In another embodiment provided by the invention, the first operation be to destination object (as, part) procedure of centre in the process of processing, before the first operation, insert the second operation, also be, the second operation is the manufacturing procedure carry out the first operation in to the process of destination object processing before, set up the incidence relation between the first operation model and the second operation model, and by the first operation model and the second operation model and between incidence relation preserve in the relation table of above-described embodiment.Particularly, can realize by the following method:
(1) copy the second initial operation model (being referred to as object module) that the first operation model (being referred to as source model) is the second operation.
(2) in object module, record in source model for representing that it revises the constant of number of times, record the unique identification of source model.
(3) in object module, the corresponding relation between assembling, part, body before copying between record object model and source model and after copying.
(4) current operation sign is inserted in the relation table that records sequencing and relation between operation model associated in this technique in three-dimensional processing technology.
By above-mentioned steps, set up the incidence relation between the first operation model and the second operation model.After setting up the first operation model and the second operation model, according to increasing material mode, use operation content modification first attribute data of the second operation to obtain the second attribute data.
Particularly, from the first operation model, extract the first attribute data, obtain the relational expression between the first operation and the parts of the second operation, according to the mode that increases material, by relational expression, operation content and the first attribute data are carried out to working procedure feature and calculate the second attribute data.
Particularly, edit second attribute data such as operation title, operation content, equipment, frock, man-hour of the second operation, according to the processing content of the second operation, according to " increasing material " mode, revise the second initial operation model (i.e. the first operation model) and obtain the second operation model.
For example, the operation content of the second operation is: an axle is become to φ 20 by φ 22 cars, now the diameter of the operation model axis of the second operation is that φ 20(is using the first operation model as source model in this embodiment, copy the first operation model as the second initial operation model), based on the first operation model, setting up the second operation model, is exactly, on the basis of φ 20, axle " is increased to material " to φ 22.In this embodiment, the relational expression between the first operation and the parts of the second operation is the calculating formula between φ 20 and φ 22, and the relational expression between the parts (as: axle) of the first operation and the second operation is above-mentioned increasing material formula.According to above-mentioned increasing material formula, operation content and the first attribute data are calculated, adjust respectively the data such as equipment, frock and man-hour in the first attribute data and obtain the second attribute data.Use the second attribute data to upgrade the first operation model and obtain the second operation model.
Particularly, above-described embodiment is the process that backward is carried out operation design and modeling, select in this embodiment the reason of " increasing material " modeling to be: a part is to adopt the mode of " except material " to be processed into final part by blank according to the sequencing of operation, therefore in backward Process Planning, preceding working procedure increases material exactly with respect to later process.
The three-dimensional process model of setting up by the above embodiment of the present invention, when deleting operation model, all the operation sign in the relation table of sequencing and relation between operation model associated in this technique recording in three-dimensional processing technology to be deleted, in addition also have following several situations:
(1) delete first road or last procedure model: according to first working procedure or last procedure model, be that source model or object module are determined concrete behavior, if first working procedure model is source model, by the modification number of times constant of the relevant operation model of deleting recording in a procedure model after this operation, the unique identification of model, the corresponding relation between parts (as assembling, part, body) etc. is disposed; If first working procedure model is object module, this operation model is deleted.
(2) delete middle operation model: according to the relation table of sequencing between operation model associated in this technique recording in three-dimensional processing technology, this operation model operation model in record this operation model before the modification number of times constant of operation model, the unique identification of model, records operation and the afterwards corresponding relation between operation model inner part (as assembling, part, body) before.
(3) when revising operation model, by the relation table in three-dimensional processing technology, can find the operation model of associated this operation model, according to the corresponding relation of the parts (as assembling, part, body) that record in the modification result of this operation model and associated operation model, corresponding assembling, part, body are also made to corresponding modification; Above-mentioned modification, more new element can be propagated between all process steps, realize operation model modification after associated operation model automatically change.
The three-dimensional process model of setting up by the above embodiment of the present invention, when inserting operation model, can be used the method for setting up operation model in above-described embodiment to insert new operation model.
Wherein, modification number of times in above-described embodiment is mainly used in judging whether source model is modified: this after source model is modified in source model is revised number of times and can be increased progressively, by the source model that relatively just can judge generating the modification number of times recording in the modification number of times of source model in this object module moment and current source model recording in object module, whether be modified, when source model is revised, object module also will be followed modification.Operation sign is the unique identification of this operation, and finding associated model is by a relation table, has recorded with source and target operation and be designated the relation (as source operation sign, target operation sign) between the operation of key word in this relation table; After a certain operation is deleted, the information of relevant these operations of other local records, as operation sign, the constant of revising number of times certainly will be cleaned fall, otherwise can cause confusion.
It should be noted that, in the step shown in the process flow diagram of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
From above description, can find out, the present invention has realized following technique effect: adopt the present invention, after obtaining the first operation model of the first operation, according to increasing material mode, use the operation content update first operation model of the second operation to obtain the second operation model, the incidence relation of then preserving between the first operation model and the second operation model obtains three-dimensional process model.The three-dimensional process model obtaining by such scheme, because the second operation model is to obtain on the basis of the first operation model, and the incidence relation of in store two operation models in three-dimensional process model, a procedure in three-dimensional process model changes, the operation model with the operation model changing with incidence relation also can change thereupon, when having solved a procedure in Three Dimensional Design Model in prior art or three-dimensional operation model and having changed, three-dimensional operation model all needs manual change, thereby the change of three-dimensional operation model easily makes mistakes and the low high problem of three-dimensional process model error rate that causes of efficiency, while having realized the change when one of them three-dimensional operation model, other operation models in three-dimensional process model all can automatically change thereupon, the fast accuracy rate of change speed of three-dimensional process model is high.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in memory storage and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a backward modeling method for three-dimensional process, is characterized in that, comprising:
Obtain the first operation model of the first operation;
According to increasing material mode and use the first operation model described in the operation content update of the second operation, obtain the second operation model;
The incidence relation of preserving between described the first operation model and described the second operation model obtains three-dimensional process model.
2. the backward modeling method of three-dimensional process according to claim 1, is characterized in that, the step of using the first operation model described in the operation content update of the second operation to obtain the second operation model comprises:
Create described the second operation;
Using described the first operation model as source model;
Extract the first attribute data in described source model;
Use the first attribute data described in described operation content modification to obtain the second attribute data;
Use described the second attribute data to upgrade described source model and obtain described the second operation model.
3. the backward modeling method of three-dimensional process according to claim 2, is characterized in that, the step of using the first attribute data described in described operation content modification to obtain the second attribute data comprises:
Obtain the relational expression between described the first operation and the parts of described the second operation;
By described relational expression, described operation content and described the first attribute data are carried out to working procedure feature and calculate described the second attribute data.
4. the backward modeling method of three-dimensional process according to claim 2, is characterized in that, preserves the step that incidence relation between described the first operation model and described the second operation model obtains three-dimensional process model and comprises:
In the second operation model, record the first sign of described source model and revise number of times;
Corresponding relation between described the first operation and the parts of described the second operation is preserved into described the second operation model;
The second sign of described the second operation model is preserved into associated relation table;
Preserve described source model, described the second operation model, described incidence relation and described incidence relation table, obtain described three-dimensional process model.
5. the backward modeling method of three-dimensional process according to claim 4, is characterized in that, described the first operation is that the step of obtaining the first operation model of the first operation comprises at last procedure in the process of destination object processing:
Read the Three Dimensional Design Model of the described destination object prestoring;
Using described Three Dimensional Design Model as described the first operation model.
6. a backward model building device for three-dimensional process, is characterized in that, comprising:
Acquisition module, for obtaining the first operation model of the first operation;
Update module, for obtaining the second operation model according to increasing material mode and use the first operation model described in the operation content update of the second operation;
Preserve module, for the incidence relation of preserving between described the first operation model and described the second operation model, obtain three-dimensional process model.
7. the backward model building device of three-dimensional process according to claim 6, is characterized in that, described update module comprises:
The first creation module, for creating described the second operation;
Determination module, for using described the first operation model as source model;
The first extraction module, for extracting the first attribute data of described source model;
Modified module, for being used the first attribute data described in described operation content modification to obtain the second attribute data;
Update module, obtains described the second operation model for using described the second attribute data to upgrade described source model.
8. the backward model building device of three-dimensional process according to claim 7, is characterized in that, described modified module comprises:
Relation acquisition module, for obtaining the relational expression between described the first operation and the parts of described the second operation;
Computing module, calculates described the second attribute data for described operation content and described the first attribute data being carried out to working procedure feature by described relational expression.
9. the backward model building device of three-dimensional process according to claim 7, is characterized in that, described preservation module comprises:
The first logging modle, for recording the first sign of described source model and revising number of times in the second operation model;
The first son is preserved module, for the corresponding relation between described the first operation and the parts of described the second operation is preserved into described the second operation model;
The second son is preserved module, for the second sign of described the second operation model is preserved into associated relation table;
The 3rd son is preserved module, for preserving described source model, described the second operation model, described incidence relation and described incidence relation table, obtains described three-dimensional process model.
10. the backward model building device of three-dimensional process according to claim 9, is characterized in that, described the first operation is that described acquisition module comprises at last procedure in the process of destination object processing:
Read module, for reading the Three Dimensional Design Model of the described destination object prestoring;
Model acquisition module, for using described Three Dimensional Design Model as described the first operation model.
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