CN107291045A - A kind of workshop programing system - Google Patents

A kind of workshop programing system Download PDF

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Publication number
CN107291045A
CN107291045A CN201710511864.3A CN201710511864A CN107291045A CN 107291045 A CN107291045 A CN 107291045A CN 201710511864 A CN201710511864 A CN 201710511864A CN 107291045 A CN107291045 A CN 107291045A
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feature
entity
module
information
workshop
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CN201710511864.3A
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Chinese (zh)
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CN107291045B (en
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惠恩明
杨建中
王平
王宏磊
王洁
马腾霄
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华中科技大学
武汉华中数控股份有限公司
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/18Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/4093Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
    • G05B19/40937Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine concerning programming of machining or material parameters, pocket machining
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention discloses a kind of workshop programmed method, including:Extract the geological information of part and show its threedimensional model;The manufacturing feature of part is recognized according to the threedimensional model of part, manufacturing feature list is generated;Processing technology is set according to part manufacturing feature list planning;According to the part manufacturing feature and processing technology generation numerical control program.The invention also discloses corresponding workshop programming module.The method of technical solution of the present invention, can include all information part from blank to product so that digital control system can obtain complete product information, real to realize intellectuality;Automatic programming can also be rapidly and efficiently realized, operating efficiency is greatly improved.

Description

A kind of workshop programing system

Technical field

The invention belongs to Computerized Numerical Control processing technology field, and in particular to a kind of workshop programing system.

Background technology

Digit Control Machine Tool is widely used in Aero-Space, resource equipment, automobile making, ship as the basis of equipment manufacture Manufacture and 3C processing and other fields, crudy and efficiency are improved with this.Programme-control is generally provided with Digit Control Machine Tool System, the control system can be handled logically with control coding or other symbolic instruction regulated procedures, and is decoded, Represented with the numeral of code, numerical control device is inputted by information carrier, so as to control the process of lathe.Through calculation process Various control signals are sent by digital control system, the action of lathe, shape and size by drawing, automatically by part is controlled Process.Digit Control Machine Tool preferably solves complexity, the part processing problems of precision, small lot, multi items, is a kind of flexible , dynamical automated machine tool, represent the developing direction of modern machine control technology, be a kind of typical electromechanical integration Product.

The NC programs of current digital control system input still use the G/M code text programming modes based on ISO6983 standards, This programming mode only includes some simple movement instructions and house-keeping instruction, not the geometry including part, cutter path The information such as planning, cutting tool choice, but these information are left for programming personnel to consider.Substantially this programming mode is to pass through The motion of machine spindle is specified to realize processing, it is procedure-oriented, the other information not comprising product data.

In fact, the motion and switch motion of machine spindle are define only in G/M codes, not comprising its of part to be processed His data message, therefore digital control system may not obtain the complete information of part, and also this programming mode needs consumption Plenty of time, inefficiency.Traditional ISO6983 standards can be only done simple straight line or circular interpolation, it is impossible to complete non- Often complicated processing tasks, such as SPL interpolation, it is that center cutter point is programmed according to machine spindle, rather than is pressed Programmed according to the manufacturing feature of part to be processed.Once after Program Generating, modification becomes highly difficult in plant site environment, Process can not be adjusted according to the actual conditions of plant site, it is impossible to realize that visualization adds on Digit Control Machine Tool Work, collision detection and the complicated numerical control program of modification.Due to lacking unified standard, the control of different digital control system manufacturer System instruction it is not quite identical, whole workshop programing system it is compatible poor, NC programs can not in different digital control systems Reuse, so as to cause the inefficient of workshop programming.

The content of the invention

For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of NC lathing programmed method, its All information part from blank to product can be included so that digital control system can obtain complete product information, it is real real Existing intellectuality, can also rapidly and efficiently realize automatic programming, greatly improve operating efficiency.

To achieve the above object, according to one aspect of the present invention there is provided a kind of workshop programmed method, its feature exists In, including

S1 extracts the geological information of part and shows its threedimensional model;

S2 recognizes the manufacturing feature of part according to the threedimensional model of part, generates manufacturing feature list;

S3 sets processing technology according to part manufacturing feature list planning;

S4 generates numerical control program according to the part manufacturing feature and processing technology.

The method of technical solution of the present invention, by extracting the geological information of part, can rebuild the three-dimensional mould of part Type, wherein including required parts information.On the basis of threedimensional model, feature extraction can be carried out, by a part point Multiple manufacturing features are solved, the manufacturing feature list of the part is formed.There is provided have various add in the method for technical solution of the present invention Work technique, according to the manufacturing feature list of part, can find corresponding processing technology, so as to be manufactured according to part Feature list planning sets machining process.In addition, also needing the manufacturing feature and above-mentioned processing technology according to part, pass through number Program transformation algorithm is controlled, the complete numerical control program of part processing is obtained.

As the optimal technical scheme of the present invention, step S1 includes,

The mapping relations that S11 is set up between entity description language and programming language;

S12 storage model entity objects;

S13 is according to the geological information and topology information of model entity object acquisition model entity;

S14 shows its threedimensional model according to the geological information and topology information of model entity object.

In technical solution of the present invention, entity is described using description language, numerical control is carried out using programming language Programming.Description language is first mapped to program design language and called the turn by needs during operation, and further obtains material object parts The geological information and topology information of object.Geological information refers to position and size in theorem in Euclid space, including point coordinates, curve and Curved surface etc., topology information refer to the numbers of the top points, edges, faces of entity, type and each other together with relation etc..According to upper Information is stated, the specific threedimensional model of part may finally be shown.

As the optimal technical scheme of the present invention, step S2 includes,

S21 travels through model entity, obtains the manufacturing feature of part;

S22 determines the basal plane of manufacturing feature;

S23 matches manufacturing feature type and generates feature list.

In technical solution of the present invention, entity is repeatedly traveled through, to obtain whole features of part, the technology of the present invention side as far as possible Case preferably three times.By traveling through the process of all entities for three times, the essential feature point on part can be substantially determined.In this base On plinth, it may be determined that the basal plane of part manufacturing feature, also referred to as feature bottom, and then can be with the feature completion in feature database Match somebody with somebody, determine characteristic type title, and generate the manufacturing feature list of entity.

As the optimal technical scheme of the present invention, step S4 includes,

S41 generates numerical control code fragment according to the manufacturing feature and processing technology;

S42 carries out serial number to numerical control code snippet, forms complete nc program.

One manufacturing feature represents a kind of processing type, according to the processing technology of above-mentioned setting, is calculated by NC Program transformations Method, i.e., the set form that can be recognized with a digital control system instructs to represent some regular basic NC instructions, plus Enter all kinds of technological parameters, along with preparation instructions such as lathe function and programmed methods, obtain the corresponding NC codes of the manufacturing feature Fragment, each NC code snippet is as a processing subprogram and numbers.Carried out by the way of main program call subroutine Code is recombinated, and is integrated into a complete NC program.

According to the other side of technical solution of the present invention, there is provided a kind of workshop programing system, it is characterised in that including

Information extraction modules, for extracting the geological information of part and showing its threedimensional model;

Feature generation module, the manufacturing feature for recognizing part according to the threedimensional model of part, generation manufacturing feature row Table;

Technique setup module, for setting processing technology according to part manufacturing feature list planning;

Program generating module, for generating numerical control program according to the part manufacturing feature and processing technology.

As the optimal technical scheme of the present invention, information extraction modules include

Mapping block, for setting up the mapping relations between entity description language and programming language;

Memory module, for storage model entity object;

Topography module, for the geological information and topology information according to model entity object acquisition model entity;

Display module, its threedimensional model is shown for the geological information and topology information according to model entity object.

As the optimal technical scheme of the present invention, feature generation module includes

Extraction module, for traveling through model entity, obtains the manufacturing feature of part;

Basal plane module, the basal plane for determining manufacturing feature;

List block, for matching characteristic type and generates feature list.

As the optimal technical scheme of the present invention, program generating module includes

Numerical control code module, for according to the manufacturing feature and processing technology, generating numerical control code fragment;

Numbering module, for carrying out serial number to numerical control code snippet, forms complete nc program.

In general, by the contemplated above technical scheme of the present invention compared with prior art, with following beneficial effect Really:

1) method of technical solution of the present invention, based on the programming mode of STEP-NC standards, contains part from blank to production All information of product, geological information of these packets containing part, tool-information, manufacturing feature information and technique information etc., Therefore digital control system can obtain complete product information, can really realize intellectuality;

2) method of technical solution of the present invention, according to part manufacturing feature Auto-matching manufacturing feature processing type template Storehouse, system is by the way of man-machine interaction, simple and direct-viewing operation so that field programming becomes easier to, and user can be quick Automatic programming efficiently is realized, operating efficiency is greatly improved;

3) method of technical solution of the present invention, whole system is a light-weighted system, compared with CAD/CAM system, Less system resource is taken, can be in the situation for not increasing Computerized Numerical Control system hardware configuration, not changing digital control system frame structure Under be integrated into digital control system so that the function of digital control system more enrich;

4) method of technical solution of the present invention, technical staff can be directed to a certain specific part, generate the number customized Procedure is controlled, by three-dimensional visual simulation process, can verify whether the numerical control program has in advance unobserved Defect, can be carried out amendment before actual processing, greatly save processing cost, improves the precision of part processing, enters One step can also improve the efficiency of numerical control machine tool.

Brief description of the drawings

Fig. 1 is the system flow chart of the embodiment of technical solution of the present invention;

Fig. 2 is the process planning flow chart of the embodiment of technical solution of the present invention.

Embodiment

In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below Not constituting conflict each other can just be mutually combined.With reference to embodiment, the present invention is described in more detail.

For the defect of traditional standard, International Organization for standardization has formulated a kind of new interface for NC programming standard ISO14649, i.e. STEP-NC standards, for substituting traditional ISO6983 standards.STEP-NC standards are general using object-oriented Read, describe process rather than machine tool motion, it includes all information of the part from blank to product, these information Three-dimensional geometric information, tool-information, manufacturing feature information and technique information comprising part.Using STEP-NC standard programs So that scene modification becomes easy, additionally it is possible to provide complicated machining function, such as SPL interpolation etc..In addition, STEP-NC Standard or a neutral-data describe interface, and it is relatively independent with CAD/CAM system, digital control system etc., therefore between system With good compatibility.

STEP-NC standards not only compensate for the defect of traditional standard, Numeric Control Technology is sent out to open, networking Exhibition, but programing system of the system of the digital control system manufacturer production of main flow also without integrated support STEP-NC standards, number at present Control system is because the limitation of hardware resource and software frame, it is difficult to integrated CAD/CAM etc. can consume the system of a large amount of system resources, So cause plant site programming to become difficult, therefore illustrated in the embodiment of technical solution of the present invention a kind of based on STEP- The workshop programing system of NC standards, it is programmed according to the manufacturing feature of part, it is easy to be integrated into digital control system.

From the point of view of actual processing process, plane, through hole, die cavity, island, arc groove, circumferential groove, boss, the part such as carve characters Manufacturing feature is most commonly seen, and these corresponding processing types of part manufacturing feature are packaged into the template of standard, forms manufacture special Levy processing type ATL.System in the embodiment of technical solution of the present invention includes STEP file information extraction modules, feature Automatic identification module, process planning module, postpositive disposal module.Wherein preferably extracted by information extraction modules from STEP files The geological information of part and the threedimensional model that part is shown using OpenGL interfaces;Feature recognition module is believed according to the geometry of part Breath automatically identifies part feature;Process planning module processes class according to the characteristic information of the part identified with manufacturing feature Type ATL is matched, and automatically selects suitable processing type, and take the mode of man-machine interaction to carry out process planning:Including The information such as processing method, processing sequence, machined parameters, cutting tool choice;Then NC programs are obtained by postpositive disposal resume module; Check whether NC programs meet technological requirement by three-dimensional verification emulation;And the system is compared with the large scale systems such as CAD/CAM, Take less system resource, it is easy to be integrated into digital control system.

Further explanation is made to technical solution of the present invention with reference to embodiment.

As shown in figure 1, the invention discloses an a kind of preferred embodiment of the workshop programing system based on STEP-NC, Including following steps:

(1) the first step:The geological information of part is extracted from STEP files by information extraction modules and its three-dimensional mould is shown Type.Including a series of sub-step:Set up mapping relations, the storage model entity pair of EXPRESS entities and C++ objects As, obtain model entity and open up general information and threedimensional model is shown.In a preferred embodiment, specifically, be first by It is used for expressing all geological informations of three-dimensional entity model in such as STEP file and the physical address of topology information is made a reservation for Justice, to one index value (Key) of each entity and Entity Type Name (Value), is stored in Map containers.Next to that will STEP files read in internal memory in the form of character string, and each character string is judged line by line, by entering to predefined keyword Row identification, target entity information in STEP files is added in the C++ object sets mapped one by one.Then character string point is utilized Segmentation method, entity topology information is stored in dynamic array, is accessed for subsequently traveling through.The AP203 agreements that STEP files are followed B-Rep relation representation models are quoted, according to the model, the biography of row address is entered by the iterator variable of entity object set Pass, the address for making iterator variable point to next layer all the time, you can realize from top layer (CLOSED_SHELL) to bottom-up information (such as CARTESIAN_POINT, DIRECTION) successively access, obtain the data letter in physical model shell-face-side-summit-direction Breath.Finally, according to entity model information preferably by OpenGL interfaces show threedimensional model, model show with face, side, point be pair As that can highlight display by selected part object in the step such as feature recognition and process planning, realize that numerical control programming procedure graph can Depending on change.

It is important to note that the embodiment of technical solution of the present invention be preferred to use STEP files, EXPRESS language and C Plus Plus, but other can realize the description language and programming language of aforesaid operations also in technical solution of the present invention Within protection domain.

(2) second step:Manufacturing feature is automatically identified by feature recognition module and feature list is generated.Feature list Generation includes some sub-steps:All entities are traveled through, the basal plane of feature is determined, matching characteristic type simultaneously generates feature list. In one preferred embodiment, due in geometry, closed boundary of the ring on the face that side is constituted, the side head and the tail in ring It is connected, can not intersects, constitutes the annular boundary of a closing.Inner ring (FACE_BOUND) is divided the ring into STEP models and outer The maximum external boundary in face is referred to as the feature such as endoporus, die cavity or boss in outer shroud, face in ring (OUT_FACE_BOUND), geometrical model Ring be referred to as inner ring.Therefore its is specific as follows:During first time travels through all entities, according to the FACE_ on piece surface BOUND inner ring judges the presence of new feature;All entities are traveled through for the second time, and new feature is judged according to the unlabelled curved surface of part In the presence of;Third time travels through all entities, and the presence of new feature is judged according to the unlabelled non-chimb of part.By three traversal institutes There is the process of entity, can substantially determine the essential feature point on part, on this basis, next step can be carried out.I.e. Determine the basal plane of part feature, also referred to as feature bottom, and then matching characteristic type and generate feature list.So-called matching characteristic, The number such as quantity, type and inner ring in face specifically just included according to predefined characteristic information matching library to feature object It is believed that breath carries out matching judgment, to determine the typonym of this feature.

(3) the 3rd step:Processing technology is set in the form of man-machine interaction by process planning module.Process planning is actually It is to be matched according to part feature with manufacturing feature processing type ATL, automatically selects suitable processing type, the present invention In the embodiment of technical scheme, the manufacturing feature processing type ATL of system include drilling, plane, milling, boss, die cavity, Carve characters, the type such as self-defined.Processing technology information is set by the way of man-machine interaction, including part geometry parameter, work are set Process parameter, lathe parameter, cutter parameters, program parameters etc..It is above-mentioned be provided with after, generation tooling step is simultaneously saved in work List is walked, finally the process sequence of part processing is determined to Working-step sequencing further according to actual demand.Process planning flow chart is as schemed Shown in 2.

(4) the 4th step:Numerical control program is generated by NC Program transformations algorithm according to part manufacturing feature and processing technology.Tool For body, a manufacturing feature represents a kind of processing type, according to the processing technology of above-mentioned setting, is calculated by NC Program transformations Method, i.e., the set form that can be recognized with a digital control system instructs to represent some regular basic NC instructions, plus Enter all kinds of technological parameters, along with preparation instructions such as lathe function and programmed methods, obtain the corresponding NC codes of the manufacturing feature Fragment, each NC code snippet is as a processing subprogram and numbers.Carried out by the way of main program call subroutine Code is recombinated, and is integrated into a complete NC program.The corresponding processing result of this numerical control program, is exactly target part.Also It is to say, by the programing system of technical solution of the present invention, technical staff can be directed to a certain specific part, what generation was customized Nc program, so as to improve the precision of part processing, can also further improve the efficiency of numerical control machine tool.

(5) the 5th step:NC programs are emulated by three-dimensional verification emulation, check whether NC programs meet technological requirement, Undesirable repeat step 3, meets the requirements, and can be processed to lathe.The purpose of three-dimensional verification emulation is, simulates The process of Digit Control Machine Tool, is contrasted with part processing result and the real demand of three-dimensional simulation, is determined raw in the 4th step Into numerical control program be the demand that meets part to be processed.By three-dimensional simulation, the numerical control program can be verified in advance Whether there is unobserved defect, so as to can be carried out amendment before actual processing, greatly save and be processed into This, improves the precision of digital control processing.

As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include Within protection scope of the present invention.

Claims (8)

1. a kind of workshop programmed method, it is characterised in that including
S1 extracts the geological information of part and shows its threedimensional model;
S2 recognizes the manufacturing feature of part according to the threedimensional model of part, generates manufacturing feature list;
S3 sets processing technology according to part manufacturing feature list planning;
S4 generates numerical control program according to the manufacturing feature and processing technology.
2. a kind of workshop programmed method according to claim 2, wherein, step S1 includes,
The mapping relations that S11 is set up between entity description language and programming language;
S12 storage model entity objects;
S13 is according to the geological information and topology information of model entity object acquisition model entity;
S14 shows its threedimensional model according to the geological information and topology information of model entity object.
3. a kind of workshop programmed method according to claim 1 or 2, wherein, step S2 includes,
S21 travels through model entity, obtains the manufacturing feature of part;
S22 determines the basal plane of manufacturing feature;
S23 matches manufacturing feature type and generates feature list.
4. a kind of workshop programmed method according to any one of claims 1 to 3, wherein, step S4 includes,
S41 generates numerical control code fragment according to the manufacturing feature and processing technology;
S42 carries out serial number to numerical control code snippet, forms complete nc program.
5. a kind of workshop programing system, it is characterised in that including
Information extraction modules, for extracting the geological information of part and showing its threedimensional model;
Feature generation module, the manufacturing feature for recognizing part according to the threedimensional model of part, generates manufacturing feature list;
Technique setup module, for setting processing technology according to part manufacturing feature list planning;
Program generating module, for generating numerical control program according to the manufacturing feature and processing technology.
6. a kind of workshop programing system according to claim 5, wherein, described information extraction module includes
Mapping block, for setting up the mapping relations between entity description language and programming language;
Memory module, for storage model entity object;
Topography module, for the geological information and topology information according to model entity object acquisition model entity;
Display module, its threedimensional model is shown for the geological information and topology information according to model entity object.
7. a kind of workshop programing system according to claim 5 or 6, wherein, the feature generation module includes
Extraction module, for traveling through model entity, obtains the manufacturing feature of part;
Basal plane module, the basal plane for determining manufacturing feature;
List block, for matching characteristic type and generates feature list.
8. a kind of workshop programing system according to any one of claim 5~7, wherein, described program generation module includes
Numerical control code module, for according to the manufacturing feature and processing technology, generating numerical control code fragment;
Numbering module, for carrying out serial number to numerical control code snippet, forms complete nc program.
CN201710511864.3A 2017-06-27 2017-06-27 Workshop programming system CN107291045B (en)

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