CN107423512A - A kind of light-weight design method of large-scale die-casting machine tailgate - Google Patents
A kind of light-weight design method of large-scale die-casting machine tailgate Download PDFInfo
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- CN107423512A CN107423512A CN201710630363.7A CN201710630363A CN107423512A CN 107423512 A CN107423512 A CN 107423512A CN 201710630363 A CN201710630363 A CN 201710630363A CN 107423512 A CN107423512 A CN 107423512A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/04—Constraint-based CAD
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/06—Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]
Abstract
The invention discloses a kind of light-weight design method of large-scale die-casting machine tailgate, pass through CAD（CAD）Threedimensional model is established, virtual prototype is established by Dynamics Simulation software（VPT）Force profile is emulated and drawn, then passes through computer-aided engineering（CAE）Quiet, dynamic property numerical simulation is carried out to the existing clamping tailgate with reference to model; calculate stress, rigidity and modal frequency threshold value; define tailgate design space and Non-design Space; seek the load optimum transfer path for meeting threshold limit value and the large-scale tailgate lightweight structure for meeting processing technology; light-weighted model is established finally by digitizing solution; and analysis checking is carried out, so as to reach the light-weight design to large-scale die-casting machine tailgate.The a variety of digital prototype technologies of integrated application of the present invention and density variable method topology optimization design technology, can lift designer's operating efficiency, reduce the weight of large-scale die-casting machine tailgate, and can ensure that technological feasibility.
Description
Technical field
The present invention relates to large-scale die-casting machine tailgate produce design field, especially a kind of large-scale die-casting machine tailgate it is light
Quantification design method.
Background technology
Die casting machine is the infrastructure device of compression casting, is made up of the part such as clamping, injection mechanism and control system, skill
Art content is high, mechanical, electrical, the liquid integrated precision of category, complex device, is widely used in automobile, Aero-Space, national defence, track and hands over
The industry such as logical.Clamping is made up of tailgate, machine hinge and Bottom clamp plate, and it acts on not the only folding of mould and provides thrust, and
And provide clamp force for injection process, each die casting production cycle cycle along with clamping an opening and closing movement,
Clamping is notable to the influence of the operating efficiency of die casting machine, reliability and casting quality.
Traditional clamping design uses Analogy and Experience Design mostly, causes the especially large-scale pressure of clamping
The clamping of casting machine is bulky（Weight is big）, operating efficiency is low, high energy consumption, and manufacture, installation and transport difficulty are big, cost
It is high.In the case where lightweight, green manufacturing development trend are led, the light-weight design of large-scale die-casting machine has turned into domestic and international die casting and equipped
The focus of industry research.The core technology that the light-weight design of clamping is die casting machine maximization and precise treatment must be broken through.
Each mechanism part of optimization design on the basis of overall performance is ensured, it is the light-weighted dominant ideas of large-scale die-casting machine.
Tailgate is the part that weight is maximum in clamping or even die casting machines, the die casting for clamp force 25000kN
Tail plate, piece weight carry out that the meaning of light-weight design is notable more than 25 tons, and the light-weight design of tailgate is that clamping is light
The basis of Quantitative design.The thrust that the die casting machine tailgate course of work is cut with scissors by machine, the pulling force and oil cylinder working-pressure of brother's woods post etc. carries
Lotus collective effect, force status is complicated, especially the thrust of machine hinge, is by the load of force-expanding machine structure amplification, both included
Horizontal direction component, but comprising vertical direction component, due to that can not consider force-expanding machine structure deformation effect, all directions magnitude of load leads to
It is difficult accurately to obtain to cross theoretical calculation method, and light-weighted on condition that ensureing the mechanical property of tailgate, without accurate load
Operating mode just can not effectively optimize design as input condition.In addition, the material of large-scale die-casting machine tailgate is spheroidal graphite casting
Iron, general structure are produced, weight reduction process needs to consider anufacturability using casting with reference to the mode that subsequent mechanical is processed
Can, the tail-board structure of shape is not may be produced that for existing processing mode, even if lightweight is also nonsensical again.
The content of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned prior art, there is provided a kind of lightweight of large-scale die-casting machine tailgate
Design cycle method, the real load that rapid evaluation large-scale die-casting machine tailgate is subject to, the stress based on quantization, rigidity and it can shake
It is dynamic to wait comprehensive mechanical property driving parameter, manufacturing process performance, and then efficient progress lightweight optimization design are taken into account, so as to real
The loss of weight optimization of existing large-scale die-casting machine tailgate.
To achieve these goals, the technical solution adopted by the present invention is：A kind of lightweight of large-scale die-casting machine tailgate is set
Meter method, comprises the following steps：S1：The three-dimensional entire assembly model of large-scale die-casting machine clamping is established by CAD software.
S2：The three-dimensional entire assembly model of clamping is read in by Dynamics Simulation software, establishes die casting machine matched moulds
The virtual prototype of mechanism, imitative operating mode Kinematics Simulation is carried out to virtual prototype, draw tailgate and the force profile of machine hinge
And the force profile of straight hinge and Bottom clamp plate.
S3：The discretization model of die casting machine tailgate is established by CAE software, using tailgate and machine hinge between active force as
Input condition, carries out Analysis on Static Stiffness and model analysis to the tailgate before optimization, the stress intensity of the tailgate before optimize, firm
Degree and modal frequency parameter, with reference to tailgate optimization aim, the threshold parameter of the definition quiet dynamic comprehensive mechanical property of tailgate, as excellent
Change the index of the large-scale die-casting machine tailgate reference performance after design and evaluation optimization design.Wherein, it is strong to include stress for threshold parameter
Degree, strain intensity, deflection, rigidity and modal frequency.
S4：Establish the mathematical optimization models of the die casting machine tailgate based on isotropism punishment microstructure model, Definition Model
Design space and Non-design Space, using cell density as variable, with the stress intensity of tailgate, rigidity and modal frequency threshold value make
For constraints, casting technique qualifications are concurrently set, object function is used as so that tailgate volume or weight is small.
S5：The topological optimization of tail-board structure is carried out based on variable density algorithm, if stress intensity, the rigidity of the tailgate after optimization
Compared with modal frequency compared with the reference performance index before optimization, if its relative variation within setting value ε, continues iteration meter
Calculate, otherwise, change ε values, continue iteration, until meeting object function, output unit density cloud atlas and corresponding tail-board structure
Stress intensity, rigidity and modal frequency；
S6：Reading unit density iteration result and corresponding tail-board structure stress intensity, rigidity and modal frequency result, setting
Volume fraction Vf parameters, light-weighted tailgate topological structure is obtained, the tailgate that loss of weight optimization is established according to the topological structure is detailed
Design structure；
S7：Quiet, Dynamic Performance Analysis is carried out by CAE software to the large-scale die-casting machine tailgate after optimization to verify, and it is excellent with tailgate
Change target stress intensity, rigidity and modal frequency performance parameter to be contrasted, verify whether to reach design requirement；
Otherwise, step S4 is continued executing with.
In the step S5, topological optimization mainly optimizes from load transfer path and material distribution mode direction, opens up
Flutterring in optimization process needs to pay close attention to stress intensity, rigidity, modal frequency and manufacturing process performance simultaneously.
In the step S4, the casting technique qualifications include gusset minimum thickness, and maximum gauge, gusset spacing is most
Small value, drafting angle, structural symmetry.
The beneficial effects of the invention are as follows：By using the above method, integrated application CAD（CAD）, calculate
Machine ancillary works（CAE）And virtual prototype（VPT）A variety of digital prototype technologies and density variable method topology optimization design technology,
Light-weight design flow is customized, the operating efficiency of designer's loss of weight optimization design is obviously improved, can effectively reduce large-scale pressure
The weight of casting machine tailgate, and technological feasibility is can ensure that, reduction is designed and manufactured as this, realizes Green design.
Brief description of the drawings
The present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the medium-and-large-sized locking mechanism in casting machine structure chart of the present invention.
Fig. 2 is tailgate and machine hinge used load Dynamics Simulation Dependence Results schematic diagram in the present invention.
Fig. 3 is tailgate prototype structure mechanical model schematic diagram in the present invention.
Fig. 4 is tailgate mathematical optimization models schematic diagram in the present invention.
Fig. 5 is tailgate loss of weight Optimized Iterative conditional curve in the present invention.
Fig. 6 is tailgate topological structure density cloud atlas in the present invention.
Fig. 7 is that tailgate loss of weight optimizes front-end geometry contrast schematic diagram in the present invention.
Fig. 8 is tailgate light-weight design front-end geometry rigidity contrast schematic diagram in the present invention.
Embodiment
As shown in figure 1, a kind of light-weight design method of large-scale die-casting machine tailgate of the present invention, comprises the following steps：S1：It is logical
Cross the three-dimensional entire assembly model that CAD software establishes large-scale die-casting machine clamping.
S2：The three-dimensional entire assembly model of clamping is read in by Dynamics Simulation software, establishes die casting machine matched moulds
The virtual prototype of mechanism, imitative operating mode Kinematics Simulation is carried out to virtual prototype, draw tailgate and the force profile of machine hinge
And the force profile of straight hinge and Bottom clamp plate.
S3：The discretization model of die casting machine tailgate is established by CAE software, using tailgate and machine hinge between active force as
Input condition, carries out Analysis on Static Stiffness and model analysis to the tailgate before optimization, the stress intensity of the tailgate before optimize, firm
Degree and modal frequency parameter, with reference to tailgate optimization aim, the threshold parameter of the definition quiet dynamic comprehensive mechanical property of tailgate, as excellent
Change the index of the large-scale die-casting machine tailgate reference performance after design and evaluation optimization design.Wherein, it is strong to include stress for threshold parameter
Degree, strain intensity, deflection, rigidity and modal frequency.
S4：Establish the mathematical optimization models of the die casting machine tailgate based on isotropism punishment microstructure model, Definition Model
Design space and Non-design Space, using cell density as variable, with the stress intensity of tailgate, rigidity and modal frequency threshold value make
For constraints, casting technique qualifications are concurrently set, object function is used as so that tailgate volume or weight is small.
S5：The topological optimization of tail-board structure is carried out based on variable density algorithm, if stress intensity, the rigidity of the tailgate after optimization
Compared with modal frequency compared with the reference performance index before optimization, if its relative variation within setting value ε, continues iteration meter
Calculate, otherwise, change ε values, continue iteration, until meeting object function, output unit density cloud atlas and corresponding tail-board structure
Stress intensity, rigidity and modal frequency；
S6：Reading unit density iteration result and corresponding tail-board structure stress intensity, rigidity and modal frequency result, setting
Volume fraction Vf parameters, light-weighted tailgate topological structure is obtained, the tailgate that loss of weight optimization is established according to the topological structure is detailed
Design structure；
S7：Quiet, Dynamic Performance Analysis is carried out by CAE software to the large-scale die-casting machine tailgate after optimization to verify, and it is excellent with tailgate
Change target stress intensity, rigidity and modal frequency performance parameter to be contrasted, verify whether to reach design requirement；
Otherwise, step S4 is continued executing with.
In the step S5, topological optimization mainly optimizes from load transfer path and material distribution mode direction, opens up
Flutterring in optimization process needs to pay close attention to stress intensity, rigidity, modal frequency and manufacturing process performance simultaneously.
In the step S4, the casting technique qualifications include gusset minimum thickness, and maximum gauge, gusset spacing is most
Small value, drafting angle, structural symmetry.
Above content is merely illustrative of the technical solution of the present invention, technology of the one of ordinary skill in the art to the present invention
The simple modification or equivalent substitution that scheme is carried out, all without departing from the spirit and scope of technical solution of the present invention.
Claims (3)
- A kind of 1. light-weight design method of large-scale die-casting machine tailgate, it is characterised in that：Comprise the following steps：S1：The three-dimensional entire assembly model of large-scale die-casting machine clamping is established by CAD software；S2：The three-dimensional entire assembly model of clamping is read in by Dynamics Simulation software, establishes locking mechanism in casting machine Virtual prototype, imitative operating mode Kinematics Simulation is carried out to virtual prototype, draw tailgate and machine hinge force profile and The force profile of straight hinge and Bottom clamp plate；S3：The discretization model of die casting machine tailgate is established by CAE software, using the active force between tailgate and machine hinge as input Condition, carries out Analysis on Static Stiffness and model analysis to the tailgate before optimization, the stress intensity of the tailgate before being optimized, rigidity and Modal frequency parameter, with reference to tailgate optimization aim, the threshold parameter of the quiet dynamic comprehensive mechanical property of tailgate is defined, is set as optimization The index of large-scale die-casting machine tailgate reference performance after meter and evaluation optimization design；S4：The mathematical optimization models of the die casting machine tailgate based on isotropism punishment microstructure model are established, Definition Model is set Space and Non-design Space are counted, using cell density as variable, using the stress intensity of tailgate, rigidity and modal frequency threshold value as about Beam condition, casting technique qualifications are concurrently set, object function is used as so that tailgate volume or weight is small；S5：The topological optimization of tail-board structure is carried out based on variable density algorithm, if stress intensity, rigidity and the mould of the tailgate after optimization State frequency is compared compared with the reference performance index before optimization, if its relative variation within setting value ε, continues to iterate to calculate, Otherwise, ε values are changed, continue iteration, until meeting object function, output unit density cloud atlas and corresponding tail-board structure stress Intensity, rigidity and modal frequency；S6：Reading unit density iteration result and corresponding tail-board structure stress intensity, rigidity and modal frequency result, setting Volume fraction Vf parameters, light-weighted tailgate topological structure is obtained, the tailgate that loss of weight optimization is established according to the topological structure is detailed Design structure；S7：Quiet, Dynamic Performance Analysis is carried out by CAE software to the large-scale die-casting machine tailgate after optimization to verify, and it is excellent with tailgate Change target stress intensity, rigidity and modal frequency performance parameter to be contrasted, verify whether to reach design requirement；Otherwise, step S4 is continued executing with.
- 2. the light-weight design method of large-scale die-casting machine tailgate according to claim 1, it is characterised in that：The step S5 In, topological optimization mainly optimizes from load transfer path and material distribution mode direction, is needed in process of topology optimization same When pay close attention to stress intensity, rigidity, modal frequency and manufacturing process performance.
- 3. the light-weight design method of large-scale die-casting machine tailgate according to claim 1 or 2, it is characterised in that：The step In rapid S4, the casting technique qualifications include gusset minimum thickness, maximum gauge, gusset spacing minimum value, drafting angle, Structural symmetry.
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| CN109409023A (en) * | 2018-12-24 | 2019-03-01 | 爱驰汽车有限公司 | The optimization method of torsion BOX Model, system and storage medium after automobile based on CAE |
| CN111619044A (en) * | 2020-06-28 | 2020-09-04 | 无锡海天机械有限公司 | Template rigidity comparison method and forming die |
| CN112115583A (en) * | 2020-08-20 | 2020-12-22 | 深圳领威科技有限公司 | Die casting machine performance evaluation method and evaluation system based on numerical simulation |
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| CN113111540A (en) * | 2021-05-06 | 2021-07-13 | 浙江大学 | Energy-saving optimization method for integration of melting, distribution and heat preservation parameters for aluminum die casting |
| CN116484655A (en) * | 2023-06-21 | 2023-07-25 | 宁波力劲科技有限公司 | Multi-objective optimization design method for die clamping mechanism of extrusion casting equipment |
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| CN109409023A (en) * | 2018-12-24 | 2019-03-01 | 爱驰汽车有限公司 | The optimization method of torsion BOX Model, system and storage medium after automobile based on CAE |
| CN111619044A (en) * | 2020-06-28 | 2020-09-04 | 无锡海天机械有限公司 | Template rigidity comparison method and forming die |
| CN111619044B (en) * | 2020-06-28 | 2022-04-05 | 无锡海天机械有限公司 | Template rigidity comparison method |
| CN112115583A (en) * | 2020-08-20 | 2020-12-22 | 深圳领威科技有限公司 | Die casting machine performance evaluation method and evaluation system based on numerical simulation |
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| CN113111540A (en) * | 2021-05-06 | 2021-07-13 | 浙江大学 | Energy-saving optimization method for integration of melting, distribution and heat preservation parameters for aluminum die casting |
| CN113111540B (en) * | 2021-05-06 | 2022-07-12 | 浙江大学 | Energy-saving optimization method for integration of melting, distribution and heat preservation parameters for aluminum die casting |
| CN116484655A (en) * | 2023-06-21 | 2023-07-25 | 宁波力劲科技有限公司 | Multi-objective optimization design method for die clamping mechanism of extrusion casting equipment |
| CN116484655B (en) * | 2023-06-21 | 2023-08-25 | 宁波力劲科技有限公司 | Multi-objective optimization design method for die clamping mechanism of extrusion casting equipment |
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Address after: 510070 15 building, 100 martyrs Road, Yuexiu District, Guangzhou, Guangdong. Patentee after: Institute of intelligent manufacturing, Guangdong Academy of Sciences Address before: 510070 15 building, 100 martyrs Road, Yuexiu District, Guangzhou, Guangdong. Patentee before: GUANGDONG INSTITUTE OF INTELLIGENT MANUFACTURING |