CN101082993A - Digitization mechanical design method - Google Patents
Digitization mechanical design method Download PDFInfo
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- CN101082993A CN101082993A CNA2006100838160A CN200610083816A CN101082993A CN 101082993 A CN101082993 A CN 101082993A CN A2006100838160 A CNA2006100838160 A CN A2006100838160A CN 200610083816 A CN200610083816 A CN 200610083816A CN 101082993 A CN101082993 A CN 101082993A
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Abstract
The invention discloses a precise-design high-efficiency designing method of digital machine, which is characterized by the following: finishing three-dimensional modeling of element based on superior CAD software platform; forming digital prototype through virtual assemblage; realizing structure optimizing design of combined harvester with longitudinal axial flow through analyzing and optimizing the property of digital prototype; manufacturing the element according to optimized three-dimensional model of digital prototype; proceeding virtual test and preparation of product under digital condition; realizing precise design; reducing the modification of project greatly; saving large quantity of working model and preparing time.
Description
Technical field
The present invention relates to a kind of machine design method, especially a kind of digitization mechanical design method.
Background technology
Mechanical Manufacturing Enterprises adopts the imitated and experience that follows for many years to carry out structural design mostly at present, draw the part two-dimensional engineering graphic by the designer according to the three-dimensional model in the brains, in brains, be reduced into three-dimensional model by producers according to two-dimensional engineering graphic again, carry out processing, the error that this process not only causes design information to be transmitted easily, cause the generation of waste product, also cause the prolongation of production cycle simultaneously.After the production of model machine part processing is finished, assemble and performance test, no matter which link mistake occurs or does not satisfy design conditions in this course, all will turn back to the designer place and make amendment.Before final model machine was determined, " design-processing-test " this process often needed repeatedly repeatedly, and this can make cost increase the launch cycle stretch-out undoubtedly.Along with the fierceness day by day of technical progress and market competition, the technology content of product and complexity are in continuous increase, and the life cycle of product shortens day by day.Therefore, the exploitation of new product and listing cycle just become the key factor that enterprise forms competitive edge.
The method for designing of united reaper is as follows usually at present: select close product by the designer according to designing requirement from known designs, revise structural parameters to adapt to current requirement.The defective of this kind method for designing is: largely rely on designer's experience when determining structural parameters, have very big randomness, can only wait to test after the product advanced development for the quality of design result and learn.
Existing research axial threshing device, that continues to use proposition such as Lu Liye mostly cuts the theoretical fundamental formular of stream threshing, its movement velocity with cereal in the threshing space is defaulted as the peripheral speed that is equal to cylinder, and the cereal average movement velocity of actual measurement only is 20%～30% of a roll circumference speed; Quality remains unchanged when supposing in addition that cereal exports motion from entering the mouth in the threshing space, and in the actual production, carrying out along with the axial threshing process, account for the very most seed of grain quality and constantly separate from notch board, therefore the mathematical model of setting up based on the thought of mass conservation lacks persuasion.
Summary of the invention
(1) technical matters that will solve
The objective of the invention is at above-mentioned the deficiencies in the prior art, a kind of digitization mechanical design method accurate, that efficient is high that designs is provided.
(2) technical scheme
For achieving the above object, the present invention adopts following technical scheme:
Digitization mechanical design method of the present invention is characterized in that comprising the steps:
A, each part that utilizes the computing machine handle to form engineering goods carry out three-dimensional modeling respectively;
B, above-mentioned each three-dimensional model is carried out virtual assembling, formation virtual product model according to the structure of each part and the relation of the position between each part, assembly relation;
Whether the assembly relation in C, the inspection virtual product model between each three-dimensional model meets the requirements fully, if meet the requirements fully then form digital prototype, if not in full conformity with requiring, then make amendment at undesirable three-dimensional model, again carry out modeling, virtual assembling, till meeting the requirements, forming digital prototype;
D, carry out part processing according to the three-dimensional model in the digital prototype.
Preferably, after step C, also comprise digital prototype is carried out virtual test, and carry out the correction step of part three-dimensional modeling according to test findings.
Preferably, in the described steps A, the three-dimensional modeling step comprises: the three-dimensional modeling that carries out model of parts on CAD software platform Pro/ENGINEER wildfire; More preferably, in the described three-dimensional modeling step, for the part of regular shape, the feature description method of taking the embedded Pro/Toolkit module of Pro/ENGINEER wildfire to provide is come automatic modeling; For standard component, the family's table function that utilizes Pro/ENGINEER wildfire to provide carries out parametric modeling; For shop parts in irregular shape, the foundation characteristic modeling function that adopts Pro/ENGINEER wildfire to provide realizes that in conjunction with the engineering characteristics modeling function part carries out three-dimensional modeling.
Wherein said engineering goods are united reaper, wherein steps A be will form the winder of united reaper, cutter, fan, feeding screw feeder, inclined transporter, pilothouse, axial-flow type drum, propons, spiral conveyer, notch board, tanker, top cover, seed screw feeder, sieve, tailing auger, seed slide plate, assorted surplus slide plate, slide plate, top sieve, grass-removing wheel, tail sheet carry out three-dimensional modeling respectively down.
Among the described step B, based on united reaper cascade hierarchy unit assembly structure, assembly relation between the composition parts in each cascade hierarchy unit is analyzed, be summed up as positioning relation, connecting relation and kinematic relation three classes, assembly relation between corresponding respectively each sub-assemblies, the general assembly part also carries out virtual assembling, forms the virtual product model.
Among the described step C, the virtual product model that virtual assembling is formed carries out static interference checking and movement interference inspection, is revised by modification assembly relation or modification part model size for the interference situation of finding in the checking process.
Embedded Pro/Mechanism module and the Pro/Mechanica module of utilization Pro/ENGINEER wildfire carried out motion analysis to moving component, obtain the motion state characteristic of parts, and the utilization dynamics simulation software ADAMS is carried out dynamic analysis to vibratory screening apparatus and is optimized the satisfied optimal vibration sieve structure of requirement of cleaning of acquisition.
(3) beneficial effect
The advantage and the good effect of digitization mechanical design method of the present invention are: the present invention adopts digital prototype technology, in conjunction with researchs such as knowledge engineering, virtual design and collaborative designs, finish Products Development on computers, by analysis to product model, product scheme design is carried out the virtual test and the manufacturing of product under digital state.Can realize accurate design, greatly limit has reduced engineering change (EC), has saved a large amount of moulds of industrial equipment and has produced setup time, has improved work efficiency simultaneously, has reduced labour intensity.
Description of drawings
Fig. 1 is the FB(flow block) of digitization mechanical design method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, further describe the embodiment of digitization mechanical design method of the present invention, but be not used for limiting protection scope of the present invention.
Referring to Fig. 1.Digitization mechanical design method of the present invention comprises the steps:
A, each part that utilizes the computing machine handle to form engineering goods carry out three-dimensional modeling respectively;
B, above-mentioned each three-dimensional model is carried out virtual assembling, formation virtual product model according to the structure of each part and the relation of the position between each part, assembly relation;
Whether the assembly relation in C, the inspection virtual product model between each three-dimensional model meets the requirements fully, if meet the requirements fully then form digital prototype, if not in full conformity with requiring, then make amendment at undesirable three-dimensional model, again carry out modeling, virtual assembling, till meeting the requirements, forming digital prototype;
D, carry out part processing according to the three-dimensional model in the digital prototype.
Be that example illustrates digitization mechanical design method of the present invention below with the united reaper, it comprises the steps:
1. will form the winder, cutter, fan, feeding screw feeder, inclined transporter, pilothouse, axial-flow type drum, propons, spiral conveyer, notch board, tanker, top cover, seed screw feeder of united reaper at advanced person's CAD software platform Pro/ENGINEER wildfire, parts such as sieve, tailing auger, seed slide plate, assorted surplus slide plate, slide plate, top sieve, grass-removing wheel, tail sheet carry out three-dimensional modeling respectively down.Specifically be divided into:
A, for the part of regular shape, as the extrusion part of this class revolving parts of axial-flow type drum, this class of frame, the sweep volume part of this class of screw feeder, the feature description method of taking the embedded Pro/Toolkit module of Pro/ENGINEER wildfire to provide is come automatic modeling.
B, for screw, nut class standard spare, family's table function that the user can utilize Pro/ENGINEER wildfire to provide carries out parametric modeling.The dimensional parameters of Gong the driving of the good model of predefined (being referred to as CENERIC in form) part, feature, model etc. are put into form.User's input parameter value in form just can be created 1 new part (being called the INSTANCE part in form).
C, for shop parts in irregular shape, adopt foundation characteristic modeling function combined hole, chamferings such as stretching that Pro/ENGINEER wildfire provides, rotation, scanning, mixing, take out engineering characteristics modeling functions such as shell, rib, withdrawing pattern and realize the part three-dimensional modeling.
2. based on united reaper cascade hierarchy unit assembly structure, assembly relation between the composition parts in each cascade hierarchy unit is analyzed, be summed up as positioning relation, connecting relation and kinematic relation three classes, assembly relation between corresponding respectively each sub-assemblies, the general assembly part also carries out virtual assembling, forms the virtual product model.
3. the virtual product model that virtual assembling is formed carries out static interference checking and movement interference inspection, is revised by modification assembly relation or modification part model size for the interference situation of finding in the checking process.
4. embedded Pro/Mechanism module and the Pro/Mecha-nica module of utilization Pro/ENGINEER wildfire carried out motion analysis to moving components such as winder, screw feeder, axial-flow type drums, obtain the motion state characteristic of parts, and the utilization dynamics simulation software ADAMS is carried out dynamic analysis to vibratory screening apparatus and is optimized the satisfied optimal vibration sieve structure of requirement of cleaning of acquisition.
Adopt digitizing that engineering goods are designed, make and describe product, and product is designed, develops, estimates, revises at the different phase utilization digital model of product development.Utilize computing machine to carry out three-dimensional modeling, the structure of united reaper and part are all described out with 3D solid, and represent the relative position between non-geological informations such as various technical requirements, specification, material tolerances and each structure clear, carry out virtual assembling on this basis, check between the parts whether interfere and the gap between them, the irrationality of getting rid of some design finally forms the united reaper digital prototype.Digital prototype can be realized accurate design as making foundation, and greatly limit has reduced engineering change (EC), has saved a large amount of moulds of industrial equipment and has produced setup time.Mechanical component are expressed by digital model, each stage Share Model data, therefore simultaneously in the united reaper product design, can carry out cae analysis calculating, frock design, technological design, manufacturability analysis, and can carry out the digitizing transmission by means of network technology, realize resource sharing, for concurrent engineering creates conditions.Compare with traditional method for designing, adopt the three-dimensional digital design not only to make the united reaper geometric configuration be able to demonstration directly perceived, and the three-dimensional model that is endowed physical attribute can provide safeguard for design analysis, checking, simulation and the emulation of carrying out thereafter.
The present invention is based on digitalized design method, the motion model of cereal in the axial threshing space that proposes based on the ultimate principle of variable mass system be basic, adopt digital prototype technology that the longitudinal axial flow united reaper is designed, by analysis and test to the three-dimensional digital product model, under digital state, carry out the virtual test and the manufacturing of product, and the importing optimization module, finish novel longitudinal axial flow united reaper product scheme design at short notice.
Method of the present invention adopts the Top-Down Design Mode based on digital Platform, makes up the design overall layout of novel longitudinal axial flow united reaper complete machine earlier, and each assembly of refinement is finished each part at last then.When design component, carry out virtual assembling, investigate between the assembly, whether assembly interfere with part, adjust interfering partly.When design elements, by united reaper product parts digital model, carry out cae analysis calculating, frock design, technological design, manufacturability analysis, obtain the optimal design result.By the digital model of product parts, generate part three-view diagram or numerical control machining code automatically, be used for the production and the processing of part.
More than be preferred forms of the present invention, according to content disclosed by the invention, some identical, replacement schemes that those of ordinary skill in the art can expect apparently all should fall into the scope of protection of the invention.
Claims (8)
1. a digitization mechanical design method is characterized in that comprising the steps:
A, each part that utilizes the computing machine handle to form engineering goods carry out three-dimensional modeling respectively;
B, above-mentioned each three-dimensional model is carried out virtual assembling, formation virtual product model according to the structure of each part and the relation of the position between each part, assembly relation;
Whether the assembly relation in C, the inspection virtual product model between each three-dimensional model meets the requirements fully, if meet the requirements fully then form digital prototype, if not in full conformity with requiring, then make amendment at undesirable three-dimensional model, again carry out modeling, virtual assembling, till meeting the requirements, forming digital prototype;
D, carry out part processing according to the three-dimensional model in the digital prototype.
2, digitization mechanical design method according to claim 1 is characterized in that after step C, also comprises digital prototype is carried out virtual test, and carry out the correction step of part three-dimensional modeling according to test findings.
3, digitization mechanical design method according to claim 1 and 2 is characterized in that in the described steps A, the three-dimensional modeling step comprises: the three-dimensional modeling that carries out model of parts on CAD software platform Pro/ENGINEER wildfire.
4, digitization mechanical design method according to claim 3, it is characterized in that in the described three-dimensional modeling step, also comprise: for the part of regular shape, the feature description method of taking the embedded Pro/Toolkit module of Pro/ENGINEER wildfire to provide is come automatic modeling; For standard component, the family's table function that utilizes Pro/ENGINEER wildfire to provide carries out parametric modeling; For shop parts in irregular shape, the foundation characteristic modeling function that adopts Pro/ENGINEER wildfire to provide realizes that in conjunction with the engineering characteristics modeling function part carries out three-dimensional modeling.
5, digitization mechanical design method according to claim 1; it is characterized in that described engineering goods are united reaper, wherein steps A be will form the winder of united reaper, cutter, fan, feeding screw feeder, inclined transporter, pilothouse, axial-flow type drum, propons, spiral conveyer, notch board, tanker, top cover, seed screw feeder, sieve, tailing auger, seed slide plate, assorted surplus slide plate, slide plate, top sieve, grass-removing wheel, tail sheet carry out three-dimensional modeling respectively down.
6, digitization mechanical design method according to claim 1 or 5, it is characterized in that among the described step B, based on united reaper cascade hierarchy unit assembly structure, assembly relation between the composition parts in each cascade hierarchy unit is analyzed, be summed up as positioning relation, connecting relation and kinematic relation three classes, assembly relation between corresponding respectively each sub-assemblies, the general assembly part also carries out virtual assembling, forms the virtual product model.
7, digitization mechanical design method according to claim 1 or 5, it is characterized in that among the described step C, the virtual product model that virtual assembling is formed carries out static interference checking and movement interference inspection, is revised by modification assembly relation or modification part model size for the interference situation of finding in the checking process.
8, according to claim 3 or 5 described digitization mechanical design methods, it is characterized in that using embedded Pro/Mechanism module of Pro/ENGINEER wildfire and Pro/Mechanica module that moving component is carried out motion analysis, obtain the motion state characteristic of parts, and the utilization dynamics simulation software ADAMS is carried out dynamic analysis to vibratory screening apparatus and is optimized the satisfied optimal vibration sieve structure of requirement of cleaning of acquisition.
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| CN101901290A (en) * | 2010-07-22 | 2010-12-01 | 西北师范大学 | Machine design method based on three-dimensional virtual space of integrated mechanism |
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| CN101739478B (en) * | 2008-11-17 | 2012-08-29 | 北京卫星环境工程研究所 | Spacecraft assembly simulation technique-based virtual assembly system and virtual assembly method |
| CN102819629A (en) * | 2012-06-26 | 2012-12-12 | 上海森松环境技术工程有限公司 | Automatic assembly method and system of three-dimensional models |
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