CN110509119A - Sbrasive belt grinding process simulation method - Google Patents
Sbrasive belt grinding process simulation method Download PDFInfo
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- CN110509119A CN110509119A CN201910876977.2A CN201910876977A CN110509119A CN 110509119 A CN110509119 A CN 110509119A CN 201910876977 A CN201910876977 A CN 201910876977A CN 110509119 A CN110509119 A CN 110509119A
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- abrasive grain
- belt grinding
- sbrasive belt
- grinding process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses a kind of sbrasive belt grinding process simulation methods, including establish abrasive band contact wheel and workpiece simulation model, carry out grid dividing to the simulation model, and delete part grain unit, generate more abrasive grain random distribution models.The present invention creatively solves the problems, such as establishing for the sbrasive belt grinding simplified model of more abrasive grain random distributions, so as to improve the problem of existing Simulation of Grinding method analysis precision deficiency, more accurately simulates the sbrasive belt grinding process under more abrasive grain comprehensive functions.
Description
Technical field
The present invention relates to Sand Band Grinding Technique fields, and in particular to a kind of sbrasive belt grinding process simulation method.
Background technique
Sand Band Grinding Technique as it is a kind of grinding and polishing new process, because its with it is high in machining efficiency, " cold conditions " grinding,
The advantages such as grinding speed is stable, grinding accuracy is high, grinding cost is low are considered as a kind of high-quality, efficient, low consumption, widely used
Processing method.By basic structure form, sbrasive belt grinding it is total can be divided into two class of enclosed and open type.Open type and enclosed abrasive band mill
The various surface processing such as outer circle, inner hole, plane and type face can be carried out by cutting, and application range is very extensive.In this two major classes mode
In can be divided into that contact is wheeled, pressure nog plate formula and several citation forms of free style again.It is similar with other grinding modes, in sand
It will appear the problems such as allowing knife, vibration in band Grinding Process, seriously affected the geometric accuracy and surface matter of workpiece after processing
Amount.Therefore, the vibration mechanism during research sbrasive belt grinding and its suppressing method are for improving suface processing quality with important
Meaning.Modeling and simulation is finally in order to realize the prediction to grinding result, to the optimization of grinding condition and to grinding process
Control.
Abrasive band is usually to use electrostatic sand-planting technique that crusher is rolled to the list that needle-shape abrasive particle obtained is uniformly implanted in surface
Layer grinding tool.Because plant sand during abrasive grain point discharge effect, make most abrasive grain blade tips upward, exposed abrasive grain close to
Top dome conical model.For abrasive band abrasive grain from the point of view of microcosmic, can regard a kind of point of a knife as is circular arc, and the basil is cutting for obtuse angle or blunt circle
Tool is cut, as other cutting tools cutting materials process, workpiece surface material is made in the extruding of abrasive grain cutting sword and swiping
It is cut after being deformed under, forms finished surface.For single abrasive particle, cutting process generally can be divided into extruding, cunning
It wipes, plough plough and cutting four-stage.Grinding workpieces process is that a large amount of abrasive grains in abrasive band surface are complicated to workpiece surface progress
Extruding, swiping plough plough and cut the combined process of several effects.
Most of grinding forces are calculated and are emulated based on single abrasive particle at present, also have a small number of scholars to establish abrasive grain uniformly distributed
Sbrasive belt grinding simplified model.And during actual sbrasive belt grinding, abrasive grain exists not in the form of simple grain, but many sizes
The different abrasive grain of shape is randomly dispersed in abrasive band surface.
Summary of the invention
The object of the present invention is to provide a kind of sbrasive belt grinding simplified models of more abrasive grain random distributions, with more accurate mould
Quasi- sbrasive belt grinding process.
To solve the above-mentioned problems, according to an aspect of the invention, there is provided a kind of sbrasive belt grinding process simulation method,
It the described method comprises the following steps:
Establish abrasive band contact wheel and workpiece simulation model；
Grid dividing is carried out to the simulation model；And
Part grain unit is deleted, more abrasive grain random distribution models are generated.
In one embodiment, the step " deleting part grain unit, generate more abrasive grain random distribution models " includes
Following steps:
Step 1: extracting the element number of the grid, the dimension group of N × 1 a is generated；
Step 2: generating the dimension of N × 1 group b using random function, and it is assigned a value of 0 or 1；
Step 3: the dimension group of N × 1 a in the dimension group b of the N in step 2 × 1 and step 1 is merged into the matrix D of N × 2；
And
Step 4: delete be assigned a value of in the matrix D 1 or 0 unit, to generate more abrasive grain random distribution models.
In one embodiment, the step " establishing abrasive band contact wheel and workpiece simulation model " includes:
The abrasive band contact wheel and workpiece simulation model are established by ANSYS Workbench software, and
In the step " carrying out grid dividing to the simulation model ":
Grid dividing is carried out to the simulation model in the ANSYS Workbench software.
In one embodiment, the step 1 includes:
By the way that the model for having divided grid is imported ANSYS Mechanical APDL software, it is based on APDL order
Stream extracts all element numbers of abrasive grain layer, to generate the dimension group of the N × 1 a.
In one embodiment, the step 2 and the step 3 include:
The abrasive grain layer element number array a is imported into Matlab software, and according to random function in Matlab software
It generates the N × 1 and ties up random array b, and 0 or 1 is assigned a value of to the array b, and the array a and array b are merged into
The matrix D of the N × 2 exports text file.
In one embodiment, the step 4 includes: and carries out in ANSYS Mechanical APDL software to model
Modification, by command stream reading matrix D as a result, and according to the unit for being assigned a value of 1 in element number deletion abrasive grain layer.
In one embodiment, the method also includes following steps: more abrasive grain random distribution models are imported
HyperMesh software is for further processing, including deletes the outermost floating unit of abrasive grain layer, retains inner ring and contacts with rubber layer
Grain unit, and be tetra10 unit by the grain unit attribute modification, and model saved as into k file.
In one embodiment, the method also includes following steps: the k file is imported in LS-Dyna software, and
Abrasive band contact wheel wheel hub, rubber layer, workpieces processing material properties and abrasive grain are set according to the actual situation and are set as rigid body；With
And contact model and relevant parameter are inputted, grinding dynamics simulation is carried out, to solve grinding force, grinding temperature and/or table
Face stress distribution.
In one embodiment, in the step " establishing abrasive band contact wheel and workpiece simulation model ", by abrasive grain layer and
Contact wheel rubber layer is set as directly contacting.
In one embodiment, in the step " carrying out grid dividing to the simulation model ", by the abrasive grain layer
Grid control is two layers of tetrahedral grid.
The characteristics of the present invention is based on abrasive band Abrasive Grain random distributions, random function is combined with finite element model, real
The now sbrasive belt grinding simulation modeling of more abrasive grain random distributions.It is usually single that its advantage, which is mainly reflected in existing Simulation of Grinding model,
Abrasive grain or more abrasive grains are uniformly distributed, are unable to more abrasive grain random distribution characteristics and more abrasive grains during accurate simulation sbrasive belt grinding and are being ground
To the collective effect of workpiece in journey, the present invention establishes the sbrasive belt grinding process simplification model based on more abrasive grain random distributions, phase
Than can more accurately simulate sbrasive belt grinding process in existing simulation model, the computational accuracy of simulation analysis is improved, is had to utilize
It limits first method research wheel grinding process and provides reference, provide effective guarantee for grinding process parameters optimization.
Therefore, the present invention creatively solves the problems, such as establishing for the sbrasive belt grinding simplified model of more abrasive grain random distributions,
So as to improve the problem of existing Simulation of Grinding method analysis precision deficiency, more accurately simulate under more abrasive grain comprehensive functions
Sbrasive belt grinding process.
Detailed description of the invention
Fig. 1 is the basic structure schematic diagram of sbrasive belt grinding；
Fig. 2 is the flow chart of sbrasive belt grinding process simulation method of the invention；
Fig. 3 is the abrasive band contact wheel model for the more abrasive grain random distributions established according to the method for the present invention；
Fig. 4 is the enlarged drawing of the part A in Fig. 3；And
Fig. 5 is grinding force simulation result suffered by workpiece.
Specific embodiment
Presently preferred embodiments of the present invention is described in detail below with reference to attached drawing, it is of the invention to be clearer to understand
Objects, features and advantages.It should be understood that embodiment shown in the drawings does not limit the scope of the present invention, and only it is
Illustrate the connotation of technical solution of the present invention.
In the following description, elaborate certain details to provide for the purpose for illustrating various disclosed embodiments
To the thorough understanding of various open embodiments.But it one skilled in the relevant art will recognize that can be in without these details
One or more details the case where get off to practice embodiment.Under other circumstances, well known device associated with this application,
Structure and technology may not be illustrated in detail or describe to avoid unnecessarily obscuring the description of embodiment.
Expression is in conjunction with the embodiments described to be referred to " one embodiment " or " embodiment " throughout the specification
Certain features, structure or feature are included at least one embodiment.Therefore, in each position of the whole instruction " at one
In embodiment " or " in an embodiment " in appearance without all referring to identical embodiment.In addition, certain features, structure or feature
It can combine in any way in one or more embodiments.
In the following description, structure and working method of the invention in order to clearly demonstrate, will be by many Directional words
It is described, but should be by the words such as "front", "rear", "left", "right", "outside", "inner", " outside ", " inside ", "upper", "lower"
Language understands for convenience of term, and is not construed as word of limitation.
The present invention relates to a kind of sbrasive belt grinding process simulation methods based on more abrasive grain random distributions, are suitable for sbrasive belt grinding
The Finite Element Simulation Analysis of processing.In order to which more accurately simulation sbrasive belt grinding process, the present invention establish more abrasive grains and divide at random
The sbrasive belt grinding simplified model of cloth, and simulation calculation is carried out to the grinding force in sbrasive belt grinding process.The present invention can solve
Certainly the technical issues of includes: the problem for improving existing Simulation of Grinding method analysis precision deficiency, is divided at random by establishing more abrasive grains
The sbrasive belt grinding simplified model of cloth more accurately simulates the sbrasive belt grinding process under more abrasive grain comprehensive functions.
Fig. 1 is the basic structure schematic diagram of the invention by the sbrasive belt grinding emulated.As shown in Figure 1, the present invention will
The sbrasive belt grinding structure emulated generally comprises contact wheel 1, tensioning wheel 2, abrasive band 3 and workpiece 4.Referring to Fig. 2 pairs
The sbrasive belt grinding process simulation method of invention is illustrated, and wherein Fig. 2 is the stream of sbrasive belt grinding process simulation method of the invention
Cheng Tu.
As shown in Fig. 2, method of the invention since step 100, terminates to step 700, generally comprises following steps:
Step 200: establishing abrasive band contact wheel and part model.
Firstly, since needle-shape abrasive particle is uniformly implanted in abrasive band surface, abrasive grain is practical to be bound with abrasive band.Secondly as abrasive band is thick
It spends relatively thin, to simplify the calculation, ignores bonding agent and abrasive band paper structure, abrasive grain layer and contact wheel rubber layer are set as directly connecing
Touching.
In one embodiment, the present invention establishes abrasive band contact wheel and workpiece using ANSYS Workbench software respectively
Simulation model.
Step 300: carrying out grid dividing.
Firstly, since contact wheel wheel hub and rubber layer are not as region is paid close attention to, it is Reduction Computation amount, this Partial Mesh
Size is larger.Secondly, abrasive grain layer and workpiece size of mesh opening should refine to guarantee computational accuracy, and the control of abrasive grain layer grid is two
Layer tetrahedral grid.
In one embodiment, grid is carried out to the model in above-mentioned steps 200 in ANSYS Workbench software to draw
Point.
Step 400: deleting part grain unit, generate more abrasive grain random distribution models.
In one embodiment, step 400 is realized by following steps.
Firstly, the model of grid division is imported ANSYS Mechanical APDL software, extracted based on APDL command stream
All element numbers of abrasive grain layer generate the dimension group of N × 1 a.
Secondly, abrasive grain layer element number array a is imported Matlab software, and according to random function in Matlab software
It generates a N × 1 and ties up random array b, and be assigned a value of 0 or 1, two number group of a, b is then merged into the matrix D of N × 2 again, and defeated
Text file out.Wherein it is possible to change the density of abrasive grain distribution by the ratio that control random function generates 0,1.
Again, it modifies in ANSYS Mechanical APDL software to model, matrix D is read by command stream
As a result, and according to element number delete abrasive grain layer in be assigned a value of 1 unit.It will be understood to those skilled in the art that this step
Can also be deleted in rapid be assigned a value of in abrasive grain layer 0 unit.
Step 500: further improving contact wheel model and generate k file.
In one embodiment, the model in step 400 is imported HyperMesh software to be for further processing, deletes mill
The outermost floating unit of granulosa retains the grain unit that inner ring is contacted with rubber layer, and is by grain unit attribute modification
Tetra10 unit, it is as shown in Figure 3 and Figure 4 to finally obtain model, and model is then saved as k file.
Step 600: importing LS-Dyna software and carry out dynamics simulation.
In one embodiment, dynamics simulation is carried out using LS-Dyna software.
It is first turned on LS-Dyna solver, the k file saved in steps for importing 500, and abrasive band is set according to the actual situation
Contact wheel wheel hub, rubber layer, workpieces processing material properties, set rigid body for abrasive grain.
Secondly, input contact model and relevant parameter, carry out grinding dynamics simulation, grinding force, grinding can be solved
Temperature, surface stress distribution etc..
The detailed mistake of the sbrasive belt grinding process simulation method of the invention based on more abrasive grain random distributions is discussed in detail above
Cheng Tu.It will be appreciated, however, by one skilled in the art that the present invention is not limited to using each software described in above step come real
Existing, software described in above step is only used for realizing an example software of method of the invention, can be used and appoints
What he can be realized the software of these functions to realize the present invention.
In addition, if be only the sbrasive belt grinding process simulation method based on more abrasive grain random distributions of realizing, it can be only
Include the steps that in above-mentioned steps 200 to step 400, so that it may realize the sbrasive belt grinding process for establishing more abrasive grain random distributions.
Fig. 5 is grinding force simulation result suffered by workpiece of the invention.As shown in figure 5, abrasive band mill through the invention
Cut process simulation method, grinding force suffered by workpiece is closer to truth.
To sum up, the present invention mainly creatively solves the modeling of more abrasive grain random distributions, thus closer to true
Situation, so that can establish the sbrasive belt grinding simulation model based on more abrasive grain random distributions by the above process, realization was ground
The simulation calculation of journey provides safeguard for the accurate mechanics obtained in labor cost process, thermal parameters.
Presently preferred embodiments of the present invention has already been described in detail above, it is understood that having read of the invention above-mentioned say
After awarding content, those skilled in the art can make various modifications or changes to the present invention.Such equivalent forms equally fall within this
Apply for the appended claims limited range.
Claims (10)
1. a kind of sbrasive belt grinding process simulation method, which is characterized in that the described method comprises the following steps:
Establish abrasive band contact wheel and workpiece simulation model；
Grid dividing is carried out to the simulation model；And
Part grain unit is deleted, more abrasive grain random distribution models are generated.
2. sbrasive belt grinding process simulation method according to claim 1, which is characterized in that the step " deletes part to grind
Grain unit, generates more abrasive grain random distribution models " the following steps are included:
Step 1: extracting the element number of the grid, the dimension group of N × 1 a is generated；
Step 2: generating the dimension of N × 1 group b using random function, and it is assigned a value of 0 or 1；
Step 3: the dimension group of N × 1 a in the dimension group b of the N in step 2 × 1 and step 1 is merged into the matrix D of N × 2；And
Step 4: delete be assigned a value of in the matrix D 1 or 0 unit, to generate more abrasive grain random distribution models.
3. sbrasive belt grinding process simulation method according to claim 2, which is characterized in that
The step " establishing abrasive band contact wheel and workpiece simulation model " includes:
The abrasive band contact wheel and workpiece simulation model are established by ANSYS Workbench software, and
In the step " carrying out grid dividing to the simulation model ":
Grid dividing is carried out to the simulation model in the ANSYS Workbench software.
4. sbrasive belt grinding process simulation method according to claim 2, which is characterized in that the step 1 includes:
By the way that the model for having divided grid is imported ANSYS Mechanical APDL software, mentioned based on APDL command stream
All element numbers of abrasive grain layer are taken, to generate the dimension group of the N × 1 a.
5. sbrasive belt grinding process simulation method according to claim 2, which is characterized in that the step 2 and the step
Three include:
The abrasive grain layer element number array a is imported into Matlab software, and is generated in Matlab software according to random function
The N × 1 ties up random array b, and is assigned a value of 0 or 1 to the array b, and the array a and array b are merged into the N
× 2 matrix Ds export text file.
6. sbrasive belt grinding process simulation method according to claim 2, which is characterized in that the step 4 includes: In
It modifies in ANSYS Mechanical APDL software to model, by command stream reading matrix D as a result, and according to list
1 unit is assigned a value of in member number deletion abrasive grain layer.
7. sbrasive belt grinding process simulation method according to claim 1, which is characterized in that the method also includes following steps
It is rapid: more abrasive grain random distribution models being imported into HyperMesh software and are for further processing, including delete abrasive grain layer outermost layer
Floating unit, retain the grain unit that contacts with rubber layer of inner ring, and the grain unit attribute modification is mono- for tetra10
Member, and model is saved as into k file.
8. sbrasive belt grinding process simulation method according to claim 7, which is characterized in that the method also includes following steps
It is rapid: the k file being imported in LS-Dyna software, and abrasive band contact wheel wheel hub, rubber layer, processing are set according to the actual situation
Workpiece material attribute and abrasive grain are set as rigid body；And contact model and relevant parameter are inputted, carry out grinding dynamics simulation
It calculates, to solve grinding force, grinding temperature and/or surface stress distribution.
9. sbrasive belt grinding process simulation method according to claim 1, which is characterized in that " establish abrasive band in the step
In contact wheel and workpiece simulation model ", abrasive grain layer and contact wheel rubber layer are set as directly contacting.
10. sbrasive belt grinding process simulation method according to claim 1, which is characterized in that in the step " to described imitative
True mode carries out grid dividing " in, the abrasive grain layer grid control is two layers of tetrahedral grid.
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| CN112276683A (en) * | 2020-10-28 | 2021-01-29 | 沈阳工业大学 | Method for predicting surface appearance of abrasive belt grinding screw curved surface |
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