CN108804773A - Using box machine tool beam optimum design method in the compound case of more reinforcing plate structures - Google Patents
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Abstract
The invention discloses box machine tool beam optimum design methods in a kind of case compound using more reinforcing plate structures, mainly include the following steps：Machine tool beam three-dimensional structure parameterized model is built, static characteristic simulation analysis is carried out；According to crossbeam Simulation result data, determine that beam structure designs weakest part；Change reinforcing plate structure inside crossbeam, crossbeam local weak part is reinforced using a variety of reinforcing plate structures compound form；It determines crossbeam improved structure, and its critical size is optimized；The front and back properties of comparison optimization, verify the reasonability of final scheme.Optimum design method proposed by the present invention is rationally reliable, it is easy to accomplish, its static and dynamic performance is improved while mitigating crossbeam quality, there is stronger engineering practicability.
Description
Technical field
The invention belongs to Machine Tool design technical fields, are related to a kind of construction design method of lathe key components and parts, specifically
It is related to box machine tool beam optimum design method in a kind of case compound using more reinforcing plate structures.
Background technology
Important component of the machine tool beam as numerically-controlled machine tool, carries the key components and parts such as slide, ram, main shaft thereon
Weight, the beam deformation caused by its own gravity and external load will directly affect the overall performance of lathe, and then influence
The geometric accuracy and suface processing quality of workpiece.It is therefore desirable to which crossbeam in addition to light weight, high rigidity, small deformation, will also have
There is good dynamic characteristic.
Traditional crossbeam design mostly uses Experience Design or Analogy, lacks corresponding theoretical foundation, there are certain
Conservative and blindness.If patent CN201720730535.3 discloses a kind of machine tool beam, by the crossbeam for having support
Between portion " well " font reinforcing rib is set, " rice " font reinforcing rib is set at both ends, and multiple " work " words are set on its section
Type structure designs to carry out the reinforcing plate structure of crossbeam.Qualitative design is arranged as crossbeam inside reinforcing plate structure in the patent,
Lack corresponding beam deformation amount data as support, it is difficult to judge crossbeam real weak spot in process；And for
The thickness parameter setting of gusset can not also determine, it will cause " redundancy " of gusset material, the increase of crossbeam overall quality.
Thus, patent CN201720730535.3 there is certain blindness, optimization design effect also to have no way of the design of beam structure
Ensure.
In order to solve the problems, such as existing crossbeam design, it is proposed that a kind of case raising middle flask compound using more reinforcing plate structures
Formula machine tool beam optimum design method carries out finite element analysis, accurately by computer virtual modeling and emulation technology to crossbeam
Crossbeam weak spot is found out, enhances crossbeam local stiffness in the form of a variety of reinforcing plate structures are combined, and to the pass of crossbeam design
Key size optimizes, and under the premise of ensureing its its Static and dynamic performance, reduces material redundancy, realizes the lightweight of crossbeam
Design.
Invention content
Present invention aims at traditional beam structure design is solved the problems, such as, provide a kind of using more reinforcing plate structures
Box machine tool beam optimum design method in compound case.This method is by using the compound form of more gussets to analysis determination
Crossbeam weak spot is reinforced, and is optimized to crossbeam critical size, real under the premise of ensureing its static and dynamic performance
The light-weight design of existing crossbeam, has stronger engineering practicability.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
Box machine tool beam optimum design method in a kind of case compound using more reinforcing plate structures includes mainly following step
Suddenly：
(1) machine tool beam three-dimensional structure parameterized model is built, and beam force feature is analyzed according to actual condition, by it
It imports finite element analysis software and carries out static characteristic simulation analysis；
(2) machine tool beam Simulation result data is analyzed, it is found that crossbeam line rail mounting surface is most weak for crossbeam nearby
Part, and along the line on rail mounting surface length direction, crossbeam intermediate deformation amount is maximum, is sequentially reduced toward both sides；
(3) change reinforcing plate structure inside crossbeam, using the compound form of a variety of reinforcing plate structures, i.e., in former crossbeam reinforcing plate structure
On the basis of, increase the reinforcing plate structure of one or more forms, while promoting crossbeam overall stiffness, to crossbeam local weak
Reinforced part；
(4) static characteristic simulation analysis is carried out to improved machine tool beam, along analysis on rail mounting surface length direction
Whether beam deformation amount reduces compared with original structure, if being better than original structure, dimensionally-optimised design is carried out by step (5), otherwise, is changed
The type of compound reinforcing plate structure or the type for increasing compound gusset are improved；
(5) under the worst working condition of beam force, to determining that the machine tool beam of internal reinforcing plate structure form improves
Scheme carries out Static and dynamic performance simulation analysis, and is optimized to its critical size using multi-objective genetic algorithm, is protecting
Under the premise of demonstrate,proving crossbeam static and dynamic performance, mitigate crossbeam weight；
It is described use multi-objective genetic algorithm carry out crossbeam critical size optimization design constraints mathematical model for：
Wherein X is n-dimensional space decision vector；F (X) is optimization aim vector；m0、δ0、f0The matter of respectively former beam structure
Amount, maximum deformation quantity and first natural frequency；mr(X)、δh(X)、fv(X) it is respectively that crossbeam quality, maximum deformation quantity and single order are solid
There is the optimization object function of frequency；xiFor critical size design variable, x in optimization designimaxAnd ximinFor i-th of critical size
The corresponding bound of design variable；
(6) properties for comparing final optimization pass design scheme and former crossbeam design scheme, verify the reasonable of final scheme
Property.
Further, in step (1), with different location of the lathe sliding assembly in crossbeam line rail stroke range to cross
Beam action carries out finite element analysis, and stress surface center is chosen since the crossbeam leftmost side, is carried out successively at interval of 200mm different
The static characteristics analysis of position obtains the crossbeam maximum deformation quantity under corresponding position.
Further, used more reinforcing plate structure complex forms are：In former crossbeam reinforcing plate structure and simulation analysis number
On the basis of, for its stress and deformation characteristics, fan type gusset is arranged along crossbeam line rail mounting surface length direction, and in cross
Rice font gusset is arranged in beam centre position.
Further, working condition when crossbeam centre position is located at sliding assembly, carries out the quiet of crossbeam improvement project
Dynamic analysis and its critical size optimization design.
It is an advantage of the invention that：
(1) box machine tool beam optimum design method in a kind of case compound using more reinforcing plate structures proposed by the present invention,
By finite element simulation data, beam structure weak spot is accurately found out, and using the compound form of a variety of reinforcing plate structures to part
Vulnerable area is reinforced, and crossbeam overall stability is improved；
(2) improved beam structure critical size is optimized, reduces gusset material " redundancy ", and ensureing
Under the premise of its static and dynamic performance, crossbeam light-weight design is realized.
(3) by comparing crossbeam final scheme and former scheme property indices, institute's extracting method of the present invention is verified
Reasonability, it was demonstrated that this method is rationally reliable, and is easily achieved, and has stronger engineering practicability, be numerically-controlled machine tool its
He provides beneficial reference at the design of key components and parts.
Description of the drawings
Fig. 1 is the implementing procedure using box machine tool beam optimum design method in the compound case of more reinforcing plate structures；
Fig. 2 is the initial crossbeam 3 d structure model schematic diagram of structure；
Fig. 3 is to improve rear cross beam 3 d structure model schematic diagram；
Fig. 4 is box crossbeam interior tendon board type and arrangement schematic diagram in the compound case of more reinforcing plate structures；
Fig. 5 is crossbeam improved structure and initial configuration deformation simulation data comparison curve graph；
Fig. 6 is crossbeam improved structure critical size schematic diagram.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, invention is further described in detail.
Embodiment
The present invention is improved using the design of gate bridge miller beam structure as embodiment, and specific implementation flow is as shown in Figure 1.
First, initial machine tool beam three-dimensional structure parameterized model is built, as shown in Figure 2.
Beam force feature is analyzed further according to actual condition, finite element analysis software is conducted into, with lathe sliding assembly
Different location in crossbeam line rail stroke range carries out static characteristic simulation analysis to the action condition of crossbeam.Most from crossbeam
Left side starts to choose stress surface center, carries out the static characteristics analysis of different location at interval of 200mm successively, obtains corresponding position
Under crossbeam maximum deformation quantity.Machine tool beam Simulation result data is analyzed, it is cross to find crossbeam line rail mounting surface nearby
Beam weakest part, and along the line on rail mounting surface length direction, crossbeam intermediate deformation amount is maximum, is sequentially reduced toward both sides.
Then on the basis of former crossbeam reinforcing plate structure and simulation analysis data, for its stress and deformation characteristics, change
Reinforcing plate structure inside crossbeam, reinforces crossbeam local weak part using the compound form of a variety of reinforcing plate structures.Along cross
Fan type gusset is arranged on beam line rail mounting surface length direction, and rice font gusset is set in crossbeam centre position, such as Fig. 3 and Fig. 4
It is shown.Static characteristic simulation analysis is carried out to improved machine tool beam, obtain along crossbeam on rail mounting surface length direction
Deflection draws the beam deformation curve of each scheme, as shown in Figure 5.
The beam deformation curve being made of the emulation data of each scheme comparative analysis, along crossbeam line rail mounting surface
After arranging fan type gusset on length direction, deflection is obviously reduced；On the compound basis of above-mentioned well type and fan type reinforcing plate structure
On, after the maximum position setting rice font gusset of crossbeam intermediate deformation amount, vulnerable area is strengthened among crossbeam, deflection
Reduce, while also the deflection of crossbeam both sides corresponding position is also reduced, and improves the rigidity of crossbeam entirety, so that it is determined that
The compound machine tool beam structure of the reinforcing plate structure of " well type+fan type+rice font ".
Finally, working condition when crossbeam centre position is located at sliding assembly, it is closed using multi-objective genetic algorithm
Key size optimizes.According to beam structure feature, 12 critical design dimensions as shown in FIG. 6 ruler as an optimization is selected
It is very little, and suitable value range is set, the initial value and value range of each critical size are as shown in table 1.
1 critical design dimensions parameter setting information of table
Using the optimization design module based on multi-objective genetic algorithm in ANSYS Workbench to crossbeam improved structure into
Row experimental design establishes the functional relation between 12 design variables and 3 characteristic index, obtains 289 groups of sample points, according still further to
Multi-objective genetic algorithm mathematic optimal model setting constraints is solved, and obtains critical size variable optimal value, and carry out
Rounding, as shown in table 2.
2 critical design dimensions variable optimum results of table
Crossbeam improved structure threedimensional model is changed according to rounding result, and is imported with finite element analysis software again and is tested
Card analysis.Final optimization pass design scheme and the simulation analysis data comparison of former crossbeam and crossbeam improved structure are as shown in table 3.
Table 3 optimizes front and back results contrast
It can be obtained by above-mentioned simulation analysis data, former crossbeam is using the compound reinforcing plate structure form of more reinforcing plate structures
Afterwards, maximum deformation quantity reduces, and crossbeam integral rigidity improves.But due to increasing gusset, weight increased, and intrinsic frequency slightly has
Reduce；Thus, crossbeam critical size is optimized on the basis of improved structure.It is horizontal compared with former crossbeam scheme after optimization
Beam quality alleviates 226.5kg, maximum deformation quantity reduces 10.86%, and first natural frequency increases 2.5%, it was demonstrated that most
The reasonability of whole prioritization scheme.
In conclusion box machine tool beam optimization design in a kind of case compound using more reinforcing plate structures proposed by the present invention
Method finds former beam structure weak spot by finite element analysis, determines overall improvement organization plan, then to its critical size into
Row optimization, clear thinking；Crossbeam Simulation result data after optimization is compared with former crossbeam, Static and dynamic performance improves, and
Realize the light-weight design of crossbeam, it was demonstrated that final optimization pass scheme is rationally reliable, has stronger engineering practicability.
Embodiment provided above is only the preferred embodiment of the present invention.Above-mentioned specific implementation mode is used only for example
Property explanation or explain the principle of the present invention, but not to limit the present invention.Therefore, in the spirit and model without departing from the present invention
Any modification, equivalent substitution, improvement and etc. done in the case of enclosing, should be included within the scope of the present invention.In addition, this
Invention appended claims are intended to cover fall into the equal similar shapes on attached claim scope and boundary or this range and boundary
Whole change and modification examples within formula.
Claims (4)
1. box machine tool beam optimum design method in a kind of case compound using more reinforcing plate structures, which is characterized in that including with
Lower step：
(1) machine tool beam three-dimensional structure parameterized model is built, and beam force feature is analyzed according to actual condition, is conducted into
Finite element analysis software carries out static characteristic simulation analysis；
(2) machine tool beam Simulation result data is analyzed, it is crossbeam weakest part to find crossbeam line rail mounting surface nearby,
And along the line on rail mounting surface length direction, crossbeam intermediate deformation amount is maximum, is sequentially reduced toward both sides；
(3) change reinforcing plate structure inside crossbeam, using the compound form of a variety of reinforcing plate structures, i.e., the base in former crossbeam reinforcing plate structure
On plinth, increase the reinforcing plate structure of one or more forms, while promoting crossbeam overall stiffness, to crossbeam local weak part
Reinforced；
(4) static characteristic simulation analysis is carried out to improved machine tool beam, rail mounting surface length direction upper beam along analysis
Whether deflection reduces compared with original structure, if being better than original structure, dimensionally-optimised design is carried out by step (5), otherwise, is changed compound
The type of reinforcing plate structure or the type for increasing compound gusset are improved；
(5) under the worst working condition of beam force, to determining the machine tool beam improvement project of internal reinforcing plate structure form
Static and dynamic performance simulation analysis is carried out, and its critical size is optimized using multi-objective genetic algorithm, is ensureing cross
Under the premise of beam static and dynamic performance, mitigate crossbeam weight；
It is described use multi-objective genetic algorithm carry out crossbeam critical size optimization design constraints mathematical model for：
Wherein X is n-dimensional space decision vector；F (X) is optimization aim vector；m0、δ0、f0The quality of respectively former beam structure,
Maximum deformation quantity and first natural frequency；mr(X)、δh(X)、fv(X) it is respectively that crossbeam quality, maximum deformation quantity and single order are intrinsic
The optimization object function of frequency；xiFor critical size design variable, x in optimization designimaxAnd ximinIt is set for i-th of critical size
Count the corresponding bound of variable；
(6) properties for comparing final optimization pass design scheme and former crossbeam design scheme, verify the reasonability of final scheme.
2. box machine tool beam optimization design side in a kind of case compound using more reinforcing plate structures according to claim 1
Method, it is characterised in that：In step (1), with different location of the lathe sliding assembly in crossbeam line rail stroke range to crossbeam
Effect carry out finite element analysis, stress surface center is chosen since the crossbeam leftmost side, carries out different positions at interval of 200mm successively
The static characteristics analysis set obtains the crossbeam maximum deformation quantity under corresponding position.
3. box machine tool beam optimization design side in a kind of case compound using more reinforcing plate structures according to claim 1
Method, it is characterised in that：Used more reinforcing plate structure complex forms are：In former crossbeam reinforcing plate structure and simulation analysis data
On the basis of, for its stress and deformation characteristics, fan type gusset is arranged along crossbeam line rail mounting surface length direction, and in crossbeam
Meta position installs a meter font gusset.
4. box machine tool beam optimization design side in a kind of case compound using more reinforcing plate structures according to claim 1
Method, it is characterised in that：It is located at working condition when crossbeam centre position with sliding assembly, carries out the quiet dynamic of crossbeam improvement project
Specificity analysis and its critical size optimization design.
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| CN118627229A (en) * | 2024-06-26 | 2024-09-10 | 纽威数控装备(苏州)股份有限公司 | Beam structure design method and beam structure of vertical machining center |
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