CN109002581A - High temperature alloy non-standard fastener Plastic Forming Reverse Design based on emulation - Google Patents
High temperature alloy non-standard fastener Plastic Forming Reverse Design based on emulation Download PDFInfo
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- CN109002581A CN109002581A CN201810642503.7A CN201810642503A CN109002581A CN 109002581 A CN109002581 A CN 109002581A CN 201810642503 A CN201810642503 A CN 201810642503A CN 109002581 A CN109002581 A CN 109002581A
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Abstract
The invention belongs to metal material processing technical fields, are related to a kind of high temperature alloy non-standard fastener Plastic Forming Reverse Design based on emulation.The present invention reverse-engineers non-standard fastener shaping dies and technique by method for numerical simulation, overcome the disadvantages of non-standard fastener mold Top-Down Design period is long, ducts starting cost is high, time-consuming repeatedly, using reverse engineer, integrated use finite element analysis technology and CAD 3D modeling technique, based on non-standard fastener product, reverse calculate designs its shaping dies geometrical characteristic, designs mold cavity specific size and position, shape, the size of flash gutters etc.；Fastener Plastic Forming numerical analysis model is established, non-standard fastener die forging forming process is analyzed, calculating provides the flowing law of material and ess-strain feature in forming process；Shaping dies is modified and is optimized with tooling based on numerical simulation result, finally obtains optimal mold geometrical characteristic parameter and its plastic forming process key process parameter.
Description
Technical field
The invention belongs to metal material processing technical fields, are related to a kind of high temperature alloy non-standard fastener modeling based on emulation
Property forming Reverse Design.
Background technique
The non-standard fastener of high temperature alloy be for standard fasteners, standard fasteners refer to structure and size,
The various aspects such as the technique of painting, label standardize completely, and the conventional fasteners produced by special manufacturer, and non-standard fastener is main
It is that country does not make stringent standard specification, except relevant parameter regulation, by other fastenings of enterprise self-determining control
Part.
For high temperature alloy non-standard fastener, especially GH4169 material, the equipment being mainly used under the conditions of high-temperature service
Connection, military service operating condition determine client for the high quality demand of this kind of fastener, and manufacturing process is usually to be provided by client
Product drawing, producer according to the processing mold feature, initial blank feature and forming process of layout design product, due to
Non-standard component customer demand is irregular, the no unified normal form of quality control, needs by rule of thumb die trial repeatedly in Top-Down Design, if
It is long to count the period, complex procedures and experimental manufacturing cost is higher repeatedly.
In recent years, numerical simulation technology extensive use and material processing manufacturing industry, can instruct metal product work well
Skill design completes the mold design and Design Processing to selected metal product, number in combination with dimensional Modeling Technology
The application of value analogue technique can substantially reduce in Top-Down Design the period of die trial and cost repeatedly, improve efficiency.
In the past for standard fasteners product, designer generallys use forward design method, borrows standards system and realizes production
Product design and craft is formulated, and for non-standard fastener products, forward design method then shows its deficiency, design process
Degree-of-difficulty factor is big, and the period is longer, higher cost, and once entire scheme will be pushed away by isolated problem occur in Top-Down Design
Come again, time and design cost are high.
Summary of the invention
The purpose of the present invention is to provide a kind of, and the high temperature alloy non-standard fastener Plastic Forming based on emulation reverse-engineers
Method.To overcome the disadvantages of high temperature alloy non-standard fastener mold Top-Down Design period is long, ducts starting cost is high, time-consuming repeatedly.
The technical solution of the invention is as follows:
1) geometric dimension and feature of high temperature alloy non-standard fastener product are extracted first with digital image processing techniques,
The 3-D geometric model that the fastener is established with 3D sculpting software calculates the body of non-standard fastener with 3D sculpting software
Product value；
2) the fastener volume calculated in the geometric dimension and feature and step 1) based on high temperature alloy non-standard fastener
Numerical value, reverse-engineers the shape chamber size and geometrical characteristic of mold, and calculates initial blank size, flash gutters size and shape, fortune
The 3-D geometric model of fastener forging mold threedimensional model and initial blank is established with 3D sculpting software；
3) 3-D geometric model of the fastener forging mold threedimensional model established in step 2) and initial blank is led
Enter progress geometry inspection in bulk forming numerical analysis software Deform, according to upper die and lower die in forging process and initial base
The space geometry positioning relation of material establishes the assembly relation between three, initial geometrical contact condition is set, using FInite Element
Discrete blank elasticoplastic body sets mold as rigid body, and wherein blank uses tetrahedron or hexahedral element, defines grid and divides again
With self-adaptive features, it is high-temperature alloy material that fastener initial blank is defined in material property, and definition material stress-strain is bent
Line, thermal conductivity, thermal diffusivity, specific heat capacity, the functional relation of linear expansion coefficient, elastic property, oxidation rate relevant parameter, definition
Heat exchange boundary condition, and kinematic geometry feature is set, calculate fastener forming process；
4) based on above-mentioned numerical simulation calculation as a result, the forming process of analysis high temperature alloy non-standard fastener, provides forming
Material flowing law in the process, from the forming process provided in material flowing law extract high temperature alloy non-standard fastener it is whole
The velocity field of body and central cross-section, temperature field, stress field distribution situation compare and analyze；
5) using above-mentioned numerical analysis model and refer to above-mentioned steps 4) in calculated result, correct fastener finishing die
Tool optimizes initial blank size, to establish the high temperature alloy non-standard fastener forming process numerical analysis model of optimization, repeats
Step 3), 4), until providing optimal shaping dies and technological design scheme.
3 d modeling software can choose Catia, UG, ProE software in the step 1, and numerical analysis software may be selected
Deform or Abaqus or other finite element analysis softwares are calculated for fastener forging and forming technology process to be analyzed.
The high temperature alloy is that the non-standard fastener Plastic Forming of GH4169 or GH738 material reverse-engineers.
The present invention have the advantages of and the utility model has the advantages that the present invention provide it is a kind of based on emulation high temperature alloy non-standard fastener modeling
Property forming Reverse Design, formed and be comprising reverse engineer, Rapid die manufacturing, technological design based on numerical simulation technology
The integral framework of closed loop.Reverse engineer for high temperature alloy non-standard fastener, mainly fastener processing mold drawing with
In the case where its plastic working technique Parameter uncertainties, size characteristic extraction is carried out to non-standard fastener product material object exemplar, and
Three-dimensional CAD model in kind is reconfigured using the software that reverse 3-D Moulding Design can be achieved, and is further had with CAE
The processes such as the realization of finite element analysis technology is analyzed, redesign, technique determine.It reverse-engineers relative to Top-Down Design, to the original of product
Beginning model or existing procucts are inversely deduced, and computer aided design and manufacture virtual reappearance non-standard fastener product is passed through
Design and manufacturing process shorten the research and development of products period, reduce cost to quickly seek optimal design scheme.
Compared with prior art, remarkable advantage is this method, 1, the present invention pass through based on numerical simulation inversely setting
The design cost of mold is greatly lowered in meter method, while three-dimensional digital design and forming process Numerical-Mode in reverse engineer
Quasi- to combine, scalability is good；2, the present invention substantially reduces the design cycle of mold, general using the design cycle of the invention
It can be achieved in one week, the market demand and environment with rapid changepl. never-ending changes and improvements now can be met very well；3, the present invention is inverse by digitizing
To design, high temperature alloy non-standard fastener forming accuracy and quality are improved, and by its forming process of numerical simulation, it can be with
Mould design and manufacture rejection rate, local problem's risk etc. in technique production are greatly reduced, beneficial to realizing cost efficiency.
Detailed description of the invention
Fig. 1 is the flow chart of design method of the present invention；
Fig. 2 is to carry out three-dimensional modeling to high temperature alloy non-standard fastener with Catia software in example of the present invention；
Fig. 3 is high temperature alloy non-standard fastener forming process numerical analysis model, wherein 1 is upper mold, 2 be initial blank, 3
It is flash gutters, 4 be lower die；
Fig. 4 is the Plastic Forming critical process material of the GH4169 non-standard fastener based on numerical result in optimal case
Expect flow characteristics.
Specific embodiment
The invention will be further elucidated with reference to specific embodiments.
Technical solution of the present invention the following steps are included:
Step 1, high temperature alloy non-standard fastener DATA REASONING and acquisition are extracted high temperature using digital image processing techniques and are closed
The geometric dimension and feature of golden non-standard fastener product, the 3-D geometric model of the fastener is established with 3D sculpting software,
And the volumetric quantities of non-standard fastener are calculated with 3D sculpting software；
Step 2, analysis and mold design, geometric dimension and feature and step 1 based on high temperature alloy non-standard fastener
The fastener volumetric quantities of middle calculating design mold cavity size and geometrical characteristic, calculate initial blank size, flash gutters size
With shape, the three of the fastener forging mold threedimensional model comprising flash gutters and initial blank are established with 3D sculpting software
Tie up geometrical model；
Step 3, forming process numerical modeling, by the fastener forging mold threedimensional model established in step 2 and initially
The 3-D geometric model of blank, which imports, carries out geometry inspection in bulk forming numerical analysis software Deform, according in forging process
The space geometry positioning relation of upper mold 1, lower die 2 and initial blank 3 establishes the assembly relation between three, sets initial geometry
Contact conditions set mold as rigid body, wherein blank uses tetrahedron or six faces using the discrete blank elasticoplastic body of FInite Element
Body unit, definition grid divides again and self-adaptive features.Defined in material property fastener initial blank (such as GH4169,
GH738 etc.) material, definition material stress-strain diagram, thermal conductivity, thermal diffusivity, specific heat capacity, linear expansion coefficient, elastic property,
The functional relation of the relevant parameters such as oxidation rate defines heat exchange boundary condition, and kinematic geometry feature is arranged, and calculates fastener
Forming process；
Step 4, simulation result analysis, based on above-mentioned numerical simulation calculation as a result, analyzing high temperature alloy non-standard fastener
Forming process provides material flowing law in forming process, from extracting high temperature in material flowing law in the forming process provided
The entirety of alloy non-standard fastener and the velocity field of central cross-section, temperature field, stress field distribution situation compare and analyze, grind
Studying carefully the defect occurred in forming process includes advising the defects of being not fully filled, fold, is under-voltage with the influence of shaping dies and technological parameter
Rule；
Step 5, feedback with amendment optimize, using above-mentioned analysis model and with reference to above-mentioned calculating and analysis as a result, correct it is non-
Fastener shaping dies and flash gutters size are marked, step 2 is returned to, optimizes initial blank size, to establish the nonstandard tight of optimization
Firmware forming process numerical analysis model repeats step 3, step 4, Optimize the forming scheme parameters of technique process, including forging temperature, forging
Speed is made, optimal shaping dies and technological design scheme are finally provided.
Embodiment
The present invention discloses a kind of high temperature alloy non-standard fastener Plastic Forming Reverse Design based on emulation, specific real
Apply that steps are as follows:
Step 1, GH4169 alloy non-standard fastener DATA REASONING and acquisition, are extracted using digital image processing techniques
The geometric dimension and feature of GH4169 alloy non-standard fastener product establish the fastening with 3D sculpting software Catia
The 3-D geometric model of part, as shown in Fig. 2, and with the volumetric quantities of 3D sculpting software Catia calculating non-standard fastener；
Step 2, analysis and mold design, geometrical characteristic based on GH4169 alloy non-standard fastener and size and
The fastener volumetric quantities calculated in step 1 design mold cavity size and geometrical characteristic, calculate initial blank size, overlap
Slot size and shape establishes fastener forging mold threedimensional model and initial blank comprising flash gutters with Catia software
3-D geometric model, respectively with * .stl or * .igs format export store；
Step 3, forming process numerical modeling, by the fastener forging mold threedimensional model established in step 2 and initially
The 3-D geometric model of blank is imported in bulk forming numerical analysis software Deform with * .stl format or * .igs format and is carried out
Geometry inspection (geometry check), according to upper mold 1 in forging process, the space geometry of lower die 4 and initial blank 2 is positioned
Relationship establishes the assembly relation between three, as shown in figure 3, initial geometrical contact condition is set, using the discrete base of FInite Element
Expect elasticoplastic body, sets mold as rigid body, wherein blank uses tetrahedron element, and definition grid divides again and self-adaptive features.
It is GH4169 material, definition material load-deformation curve, thermal conductivity, thermal expansion that fastener initial blank is defined in material property
The functional relation of the relevant parameters such as rate, specific heat capacity, linear expansion coefficient, elastic property, oxidation rate is dissipated, heat exchange perimeter strip is defined
Part, and kinematic geometry feature is set, it generates database and submits solver, calculate fastener forming process；
Step 4, simulation result analysis, based on above-mentioned numerical simulation calculation as a result, analyzing high temperature alloy non-standard fastener
Forming process provides material flowing law in forming process, from extracting high temperature in material flowing law in the forming process provided
The entirety of alloy non-standard fastener and the velocity field of central cross-section, temperature field, stress field distribution situation compare and analyze, grind
Studying carefully the defect occurred in forming process includes advising the defects of being not fully filled, fold, is under-voltage with the influence of shaping dies and technological parameter
Rule；
Step 5, feedback with amendment optimize, using above-mentioned analysis model and refer to above-mentioned calculated result, amendment fastener at
Shape mold and flash gutters size return to step 2, optimize initial blank size, to establish the GH4169 non-standard fastener of optimization
Forming process numerical analysis model repeats step 3, step 4, Optimize the forming scheme parameters of technique process, including forging temperature and forging
Speed finally provides optimal shaping dies and technological design scheme.Fig. 4 is in optimal case based on numerical result
The Plastic Forming critical process material flow characteristics of GH4169 non-standard fastener.
A variety of modifications of embodiment will be readily apparent to those skilled in the art, institute in the present invention
The General Principle of definition can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore,
The present invention is not intended to be limited to embodiment shown in the present invention, and is to fit to special with principles of this disclosure and novelty
The consistent most wide interest field of point.
Claims (3)
1. a kind of high temperature alloy non-standard fastener Plastic Forming Reverse Design based on emulation, it is characterised in that it include with
Lower step:
1) geometric dimension and feature that high temperature alloy non-standard fastener product is extracted first with digital image processing techniques, are used
3D sculpting software establishes the 3-D geometric model of the fastener, and the volume number of non-standard fastener is calculated with 3D sculpting software
Value；
2) the fastener volumetric quantities calculated in the geometric dimension and feature and step 1) based on high temperature alloy non-standard fastener,
The shape chamber size and geometrical characteristic of mold are reverse-engineered, and calculates initial blank size, flash gutters size and shape, with three-dimensional
Modeling software establishes the 3-D geometric model of fastener forging mold threedimensional model and initial blank；
3) 3-D geometric model of the fastener forging mold threedimensional model and initial blank established in step 2) is imported into body
Geometry inspection is carried out in product Numerical analysis on forming software Deform, according to upper die and lower die in forging process and initial blank
Space geometry positioning relation establishes the assembly relation between three, sets initial geometrical contact condition, discrete using FInite Element
Blank elasticoplastic body sets mold as rigid body, and wherein blank uses tetrahedron or hexahedral element, defines grid and divides again and oneself
Meeting market's demand, defined in material property fastener initial blank be high-temperature alloy material, definition material load-deformation curve,
Thermal conductivity, thermal diffusivity, specific heat capacity, the functional relation of linear expansion coefficient, elastic property, oxidation rate relevant parameter, definition heat
Boundary condition is exchanged, and kinematic geometry feature is set, calculates fastener forming process；
4) based on above-mentioned numerical simulation calculation as a result, the forming process of analysis high temperature alloy non-standard fastener, provides forming process
Middle material flowing law, from the forming process provided in material flowing law extract high temperature alloy non-standard fastener entirety and
The velocity field of central cross-section, temperature field, stress field distribution situation compare and analyze；
5) using above-mentioned numerical analysis model and refer to above-mentioned steps 4) in calculated result, correct fastener shaping dies, it is excellent
Change initial blank size, to establish the high temperature alloy non-standard fastener forming process numerical analysis model of optimization, repeats step
3), 4), until providing optimal shaping dies and technological design scheme.
2. a kind of high temperature alloy non-standard fastener Plastic Forming reverse engineer side based on emulation according to claim 1
Method, which is characterized in that 3 d modeling software can choose Catia, UG, ProE software in the step 1, and numerical analysis software can
Deform or Abaqus or other finite element analysis softwares are selected to calculate analysis for fastener forging and forming technology process.
3. a kind of high temperature alloy non-standard fastener Plastic Forming reverse engineer side based on emulation according to claim 1
Method, which is characterized in that the high temperature alloy is that the non-standard fastener Plastic Forming of GH4169 or GH738 material reverse-engineers.
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| CN113657009A (en) * | 2021-10-20 | 2021-11-16 | 山东神力索具有限公司 | Method, device and equipment for optimizing finite element model of rigging product |
| CN114169225A (en) * | 2021-11-16 | 2022-03-11 | 哈尔滨工业大学 | Method for optimizing machining sequence of aluminum alloy component based on computer simulation and computer equipment |
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| CN114169225A (en) * | 2021-11-16 | 2022-03-11 | 哈尔滨工业大学 | Method for optimizing machining sequence of aluminum alloy component based on computer simulation and computer equipment |
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Application publication date: 20181214 |