CN110008631A - Parameter simulation method and its verification method in a kind of rolling of copper pipe and cooling procedure - Google Patents
Parameter simulation method and its verification method in a kind of rolling of copper pipe and cooling procedure Download PDFInfo
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- CN110008631A CN110008631A CN201910312396.6A CN201910312396A CN110008631A CN 110008631 A CN110008631 A CN 110008631A CN 201910312396 A CN201910312396 A CN 201910312396A CN 110008631 A CN110008631 A CN 110008631A
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- 229910052802 copper Inorganic materials 0.000 title claims abstract description 136
- 239000010949 copper Substances 0.000 title claims abstract description 136
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 130
- 238000004088 simulation Methods 0.000 title claims abstract description 115
- 238000001816 cooling Methods 0.000 title claims abstract description 57
- 238000005096 rolling process Methods 0.000 title claims abstract description 47
- 238000012795 verification Methods 0.000 title claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 57
- 238000005382 thermal cycling Methods 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- 239000013078 crystal Substances 0.000 claims description 51
- 238000005498 polishing Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 229910000906 Bronze Inorganic materials 0.000 claims description 4
- 239000010974 bronze Substances 0.000 claims description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000003252 repetitive effect Effects 0.000 claims description 3
- 241000227272 Agarista populifolia Species 0.000 claims 2
- 241000208340 Araliaceae Species 0.000 claims 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 2
- 150000001879 copper Chemical class 0.000 claims 2
- 235000008434 ginseng Nutrition 0.000 claims 2
- 238000010835 comparative analysis Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses parameter simulation method and its verification methods in a kind of rolling of copper pipe and cooling procedure, belong to metal manufacture research field.The present invention is directed to examine the undergone temperature changing process (i.e. thermal cycling curve) of corresponding position by obtaining copper pipe fitting position grain size and distribution situation in rolling and cooling procedure.Numerical simulation model is established using ABAQUS, thermal simulation experiment is carried out to copper pipe fitting according to the thermal cycling curve that numerical simulation obtains, metallographic experiment is carried out to the copper pipe fitting after thermal simulation, pass through the metallographic structure of comparative analysis copper pipe fitting finished product and copper pipe fitting test product, the indirectly accuracy of verifying numerical simulation, and corresponding parameter simulation method is obtained, or even obtain the thermo parameters method situation of rolled piece indirectly with this analogy method.
Description
Technical field
The invention belongs to metals to manufacture research field, be related in a kind of rolling of copper pipe and cooling procedure parameter simulation method and
Its verification method.
Background technique
In copper pipe rolling and cooling actual production process, in order to guarantee production safety, milling train is a closed work
Make space, oxidation causes surface brightless to rolled piece in air after rolling head stretching in order to prevent, and cooling jacket is also one close
The space closed along with rolled piece is the process of a movement in entire rolling and cooling procedure, therefore is difficult through thermometric reality
The Temperature Distribution for directly measuring rolled piece in rolling and cooling procedure is tested, and exists in the prior art using software analysis and is rolled
The temperature data of part inner surface, since the accuracy of analytic process can not be verified in software analytic process, so passing through software point
Obtained temperature data is analysed to be difficult to directly substitute the data that experiment obtains；Also it can not directly compare and analyze.
Summary of the invention
The present invention provides the methods and its verification method of parameter simulation in a kind of rolling of copper pipe and cooling procedure, it is intended to logical
Crossing copper pipe fitting position grain size and distribution situation in acquisition rolling and cooling procedure examines the undergone temperature of corresponding position to become
Change process (i.e. thermal cycling curve).Numerical simulation model is established using ABAQUS, the thermal cycling curve obtained according to numerical simulation
Thermal simulation experiment is carried out to copper pipe fitting, metallographic experiment is carried out to the copper pipe fitting after thermal simulation, passes through comparative analysis copper pipe fitting finished product
With the metallographic structure of copper pipe fitting test product, the accuracy of numerical simulation is indirectly verified, and obtains corresponding parameter simulation method, very
To the thermo parameters method situation for obtaining rolled piece indirectly with this analogy method.
The present invention is achieved by the following technical solutions: a kind of verifying of copper pipe rolling and parameter simulation in cooling procedure
Method, which comprises the steps of:
Step 1, parameter obtains
The copper pipe fitting finished product by rolling, cooling procedure is obtained, carries out its grain size of metallographic measuring α 1, and obtain this
Plant production processes parameter of the copper pipe fitting finished product in rolling, cooling procedure；
Step 2, Building of Simulation Model
According to the parameter that step 1 obtains, the simulation model rolled, in cooling procedure is established on ABAQUS, and determines mould
Quasi- parameter；
Step 3, simulation process
Copper pipe fitting test product is selected, carries out thermal simulation according to the thermal cycling curve that the simulation model that step 2 is established is simulated
Then test carries out the grain size α 2 of metallographic measuring copper pipe fitting test product；
Step 4, verification process
Crystal grain tolerance rate is set, the error delta of the grain size α 2 in grain size α 1 and step 3 in comparison step 1, and will accidentally
Poor δ, if error delta is less than crystal grain tolerance rate, proves that simulation model and analog parameter are accurate compared with crystal grain tolerance rate；If error
It greater than crystal grain tolerance rate, then proves, proves simulation model and/or analog parameter inaccuracy.
Further technical solution is, needs to carry out copper pipe processing to copper pipe fitting in the metallographic experiment, observes and shoot copper
The tissue picture of pipe fitting judges whether metallographic structure distribution is reasonable, if copper pipe fitting Tissue distribution is unreasonable, re-starts copper pipe
The picture for handling and observe and shoot again tissue, if copper pipe fitting Tissue distribution is reasonable, specified grain size measurement line segment is simultaneously counted
Calculate crystal grain line density.
Further technical solution is, the copper pipe processing include using coarse sandpaper and fine sandpaper polishing copper pipe fitting plane,
Using polishing machine to copper pipe fitting metallographic face carry out polishing until copper pipe fitting metallographic face light as bronze mirror, invaded using chemical reagent
Lose copper pipe fitting metallographic face.
The present invention also provides technical solutions: a kind of method of copper pipe rolling and parameter simulation in cooling procedure, feature
It is: in a kind of copper pipe rolling described above and cooling procedure in the verification method of parameter simulation, using in verification process
Error determines the analog parameter in simulation model and simulation model compared with setting tolerance rate；
Wherein, if error delta is less than crystal grain tolerance rate, prove that simulation model and/or analog parameter are accurate；If error is greater than
Crystal grain tolerance rate then proves simulation model and/or analog parameter inaccuracy, then adjusts simulation model and/or analog parameter, then
In secondary acquisition simulation process the grain size of copper pipe fitting test product and pass through verification process, repetitive cycling verification process, adjustment process, directly
To in verification process prove simulation model and analog parameter it is accurate.
Further technical solution is comprising following steps:
Step 1, parameter obtains
The copper pipe fitting finished product by rolling, cooling procedure is obtained, carries out its grain size of metallographic measuring α 1, and obtain this
Plant production processes parameter of the copper pipe fitting finished product in rolling, cooling procedure；
Step 2, Building of Simulation Model
According to the parameter that step 1 obtains, the simulation model rolled, in cooling procedure is established on ABAQUS, and determines mould
Quasi- parameter；
Step 3, simulation process
Copper pipe fitting test product is selected, is simulated according to the simulation model that step 2 is established, metallographic measuring copper is then carried out
The grain size α 2 of pipe fitting test product；
Step 4, verification process
Crystal grain tolerance rate is set, the error delta of the grain size α 2 in grain size granularity α 1 and step 3 in comparison step 1, and
By error delta compared with crystal grain tolerance rate, if error delta is less than crystal grain tolerance rate, prove that simulation model and analog parameter are accurate, this
Method terminates parameter simulation in copper pipe rolling and cooling procedure；If error is greater than crystal grain tolerance rate, prove then to prove to emulate
Model and/or analog parameter are inaccurate, then simulation model and/or analog parameter in amendment step 2 carry out step 3-4.
Due to the adoption of the above technical scheme, the present invention can achieve the utility model has the advantages that the present invention using thermal modeling test and
Metallographic experiment combines, and analyzes the microstructure of copper pipe fitting, utilizes the copper pipe fitting finished product of actual production and the copper pipe fitting of simulated experiment
Test product is compared, the accuracy of the relevant simulation model of verifying that can be easy, and obtains corresponding parameter simulation side
Method, and the Temperature Distribution of copper pipe rolling and cooling procedure is obtained by analogy method indirectly.
Detailed description of the invention
Fig. 1 is the method flow block diagram of parameter simulation of the present invention；
Fig. 2 is the flow diagram of grain size determination in the present invention；
Fig. 3 is the observation point schematic diagram of copper pipe fitting finished product of the present invention；
Fig. 4 is copper pipe fitting finished product observation point microstructure result of the present invention；
Fig. 5 is the line segment chosen position schematic diagram that intercept method surveys grain size in the present invention；
Fig. 6 is the thermal cycling curve that point is extracted in copper pipe fitting test product simulation of the present invention；
Fig. 7 is copper pipe fitting test product observation point microstructure result of the present invention；
Specific embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawing:
Disclosure sets forth the verification methods of parameter simulation in a kind of rolling of copper pipe and cooling procedure comprising following step
It is rapid:
Step 1, parameter obtains
The copper pipe fitting finished product by rolling, cooling procedure is obtained, carries out its grain size of metallographic measuring α 1, and obtain this
Plant production processes parameter of the copper pipe fitting finished product in rolling, cooling procedure；
Step 2, Building of Simulation Model
According to the parameter that step 1 obtains, the simulation model rolled, in cooling procedure is established on ABAQUS, and determines mould
Quasi- parameter；
Step 3, simulation process
Copper pipe fitting test product is selected, carries out thermal simulation according to the thermal cycling curve that the simulation model that step 2 is established is simulated
Then test carries out the grain size α 2 of metallographic measuring copper pipe fitting test product；
Step 4, verification process
Crystal grain tolerance rate is set, the error delta of the grain size α 2 in grain size α 1 and step 3 in comparison step 1, and will accidentally
Poor δ, if error delta is less than crystal grain tolerance rate, proves that simulation model and analog parameter are accurate compared with crystal grain tolerance rate；If error
It greater than crystal grain tolerance rate, then proves, proves simulation model and/or analog parameter inaccuracy.
In the embodiment of the present invention, needs to carry out copper pipe processing to copper pipe fitting in the metallographic experiment, observe and shoot copper pipe fitting
Tissue picture, judge metallographic structure distribution it is whether reasonable, if copper pipe fitting Tissue distribution is unreasonable, re-start copper pipe processing
And the picture of tissue is observed and shot again, if copper pipe fitting Tissue distribution is reasonable, specified grain size measurement line segment simultaneously calculates crystalline substance
Grain line density.
In the embodiment of the present invention, the copper pipe processing includes using coarse sandpaper and fine sandpaper polishing copper pipe fitting plane, uses
Polishing machine to copper pipe fitting metallographic face carry out polishing until copper pipe fitting metallographic face light as bronze mirror, use chemical reagent corrode copper
Pipe fitting metallographic face.
The present invention also illustrates the method for a kind of copper pipe rolling and parameter simulation in cooling procedure, utilizes above-described embodiment
Described in a kind of copper pipe rolling and cooling procedure in parameter simulation verification method in, utilize error in verification process and setting
Tolerance rate compares, and determines the analog parameter in simulation model and simulation model；
Wherein, if error delta is less than crystal grain tolerance rate, prove that simulation model and/or analog parameter are accurate；If error is greater than
Crystal grain tolerance rate then proves simulation model and/or analog parameter inaccuracy, then adjusts simulation model and/or analog parameter, then
In secondary acquisition simulation process the grain size of copper pipe fitting test product and pass through verification process, repetitive cycling verification process, adjustment process, directly
To in verification process prove simulation model and analog parameter it is accurate.
In the embodiment of the present invention, a kind of method of copper pipe rolling and parameter simulation in cooling procedure comprising following steps:
Step 1, parameter obtains
The copper pipe fitting finished product by rolling, cooling procedure is obtained, carries out its grain size of metallographic measuring α 1, and obtain this
Plant production processes parameter of the copper pipe fitting finished product in rolling, cooling procedure；
Step 2, Building of Simulation Model
According to the parameter that step 1 obtains, the simulation model rolled, in cooling procedure is established on ABAQUS, and determines mould
Quasi- parameter；
Step 3, simulation process
Copper pipe fitting test product is selected, is simulated according to the simulation model that step 2 is established, metallographic measuring copper is then carried out
The grain size α 2 of pipe fitting test product；
Step 4, verification process
Crystal grain tolerance rate is set, the error delta of the grain size α 2 in grain size granularity α 1 and step 3 in comparison step 1, and
By error delta compared with crystal grain tolerance rate, if error delta is less than crystal grain tolerance rate, prove that simulation model and analog parameter are accurate, this
Method terminates parameter simulation in copper pipe rolling and cooling procedure；If error is greater than crystal grain tolerance rate, prove then to prove to emulate
Model and/or analog parameter are inaccurate, then simulation model and/or analog parameter in amendment step 2 carry out step 3-4.
In the embodiment of the present invention, the present invention is further described in conjunction with attached drawing.In verification method, preprepared work
The copper pipe fitting finished product of factory's production, having a size of ΦOutside50mm×ΦIt is interior44.6mm, the chosen position of the finished product are passed through in as cast condition copper pipe
After rolling and cooling jacket；And the copper pipe fitting test product for carrying out analogue simulation is as cast condition copper tube billet, having a size of ΦOutside90mm×
ΦIt is interior40mm, the sample position of the test product have just gone out crystallizer and before rolling, the production technology of copper pipe fitting test product in copper tube
Parameter is consistent with the processing parameter of the used copper tube billet of copper pipe fitting finished product of plant produced.Fig. 1 show copper pipe rolling and
The flow diagram of the verification method of numerical simulation, mainly includes the following steps: in cooling procedure
Step 1, the metallographic specimen with a thickness of 5mm is intercepted from copper pipe fitting finished product with wire cutting method, since copper pipe is cooling
In the process, cooling water is affected by gravity, while being cooled the influence of jacket structure for water factor, different positions inside cooling jacket
It sets to the cooling capacity of rolled piece difference, the thermo parameters method obtained after cooling jacket is cooling which results in rolled piece
Inhomogeneities, undergone temperature changing process (the i.e. thermal cycle of rolled piece position grain size and the corresponding position of distribution situation
Curve) it is closely connected；Therefore point 1 as shown in Figure 3, point 4, point 5, point 8, point 9, point are chosen in metallographic specimen axial middle plane
12 6 data points are metallographic observation point, using the coarse sandpaper of model 500#, 800# and 1000# to the metallographic face of metallographic specimen
It is roughly ground, fine grinding is then carried out to the metallographic face of metallographic specimen using the fine sandpaper of model 2000#, 2500# and 3000#,
Mechanical polisher is reused to polish the metallographic face of metallographic specimen, the standard of polishing be the metallographic face light of metallographic specimen such as
Bronze mirror is general, and finally selecting mass fraction is the metallographic face that 10% aqueous hydrochloric acid solution invades metallographic specimen, until under the microscope
It can be seen that ideal grain structure, using Axiovenrt 200MAT type metallographic microscope respectively to above-mentioned point 1, point 4,
12 6 point 5, point 8, point 9 and point observation points are observed, and the shooting metallographic crystal grain group being reasonably distributed as shown in Figure 4 respectively
Photo is knitted, tetra- line segments of L1, L2, L3 and L4 as shown in Figure 5 are specified in rectangle metallographic visual field, is utilized respectively intercept method calculating
The average crystal grain line density α 1 obtained on each transversal in metallographic specimen corresponding position as shown in Table 1 is as shown in table 1；
Step 2, copper pipe fitting finished product plant production processes parameter is obtained, copper pipe three-roll rolling and cooling are established on ABAQUS
Simulation model, input parameter go forward side by side Mobile state simulation, obtain copper pipe fitting rolling and cooling procedure temperature change cloud atlas, respectively
Point 1, point 4, point 5, point 8, point 9 and the temperature variation curve for putting 12 6 metallographic observation points are extracted, each metallographic observation point is provided
Thermal cycling curve such as Fig. 6；
Step 3, copper pipe fitting test product is selected, is distinguished using Gleeble thermal simulation machine according to the thermal cycling curve that step 2 obtains
Thermal simulation experiment is carried out to copper pipe fitting test product, is denoted as test specimen 1 according to the copper pipe fitting test product of the thermal cycling curve simulation of point 1, according to
The copper pipe fitting test product of the thermal cycling curve simulation of point 4 is denoted as test specimen 4, according to the copper pipe fitting test product of the thermal cycling curve simulation of point 5
It is denoted as test specimen 5, test specimen 8 is denoted as according to the copper pipe fitting test product of the thermal cycling curve simulation of point 8, according to the thermal cycling curve mould of point 9
Quasi- copper pipe fitting test product is denoted as test specimen 9, is denoted as test specimen 12 according to the copper pipe fitting test product of the thermal cycling curve simulation of point 12, refers again to
The method that step 1 handles metallographic specimen and measures grain size carries out processing and sight before metallographic experiment to six copper pipe fitting test products
It surveys, shoots the metallographic grain structure photo being reasonably distributed as shown in Figure 7, calculate separately the average crystal grain of each copper pipe fitting test product
Line density α 2 is as shown in table 1；
Step 4, grain size tolerance rate is set as 10%, according to copper pipe fitting finished product and copper pipe test specimen crystal grain average linear density meter
It is as shown in table 1 to calculate error delta；
The crystal grain average linear density application condition of 1 copper pipe fitting finished product of table and copper pipe fitting test product
Line density PLShown in calculation formula such as formula (1):
P in formulaL--- the number of dies in unit length, a/μm；
The crystal grain number that N --- specified line segment passes through, it is a；
L --- the length of specified line segment, μm.
Shown in grain lines density error calculation formula such as formula (2):
P in formulaCopper pipe fitting finished product--- the crystal grain average linear density of copper pipe fitting finished product, a/μm；
PCopper pipe fitting test product--- the crystal grain average linear density of copper pipe fitting test product, a/μm；
δ --- grain lines density error.
Copper pipe fitting finished product metallographic experimental result along rolled piece circumferential direction upper outer surface as shown in figure 4, put 9 crystal grain minimum, secondly
It is point 5, maximum crystal grain is point 1；12 crystal grain minimum is put on rolled piece inner surface, followed by puts 8, the maximum position of crystal grain is point 4.
1 crystal grain of point along rolled piece radially top is smaller than 4 crystal grain of point, and 5 crystal grain of point in the middle part of rolled piece is smaller than putting 8 crystal grain, under rolled piece
9 crystal grain of point in portion is smaller than 12 crystal grain of point.Copper pipe fitting test product metallographic experimental result is as shown in fig. 7, it can be seen from figure 7 that examination
The grain structure effect that part 9 obtains after thermal simulation is best, uniform small grains, the crystal grain group at this and 9 position of the midpoint Fig. 4
It is similar to knit size；It is similar with 5 position grain structure size of the midpoint Fig. 4 that the tiny degree of the grain structure of test specimen 5 is only second to test specimen 9；
The grain structure effect that test specimen 4 obtains after thermal simulation is worst, and grain structure is the coarseest, at this and 4 position of the midpoint Fig. 4
Grain structure size is similar.Test specimen 1, test specimen 8 and test specimen from thermal simulation test specimen microstructure visual result, in Fig. 7
12 grain structure gradually becomes thick, and grain structure size is corresponding in turn to point 1, point 8 and point 12 in Fig. 4.
As known from Table 1, highest grain size error delta is 8.94%, is less than setting tolerance rate 10%, tests measured result and mould
The quasi- result goodness of fit is higher, illustrate to test using the Metallographic Analysis of deformation thermal simulation experiment and microstructure and combines, and with reality
Method of the production copper pipe fitting in border relatively to verify copper pipe rolling and cooling procedure numerical simulation result be accurately, can also it is light and
Easily lift the Temperature Distribution using simulated experiment verifying copper pipe in the operation of rolling and cooling procedure.
Claims (5)
1. the verification method of parameter simulation method in a kind of copper pipe rolling and cooling procedure, which comprises the steps of:
Step 1, parameter obtains
The copper pipe fitting finished product by rolling, cooling procedure is obtained, carries out its grain size of metallographic measuring α 1, and obtain this copper pipe
Plant production processes parameter of the part finished product in rolling, cooling procedure；
Step 2, Building of Simulation Model
According to the parameter that step 1 obtains, the simulation model rolled, in cooling procedure is established on ABAQUS, and determines simulation ginseng
Number；
Step 3, simulation process
Copper pipe fitting test product is selected, carries out thermal modeling test according to the thermal cycling curve that the simulation model that step 2 is established is simulated,
Then the grain size α 2 of metallographic measuring copper pipe fitting test product is carried out；
Step 4, verification process
Crystal grain tolerance rate is set, the error delta of the grain size α 2 in grain size α 1 and step 3 in comparison step 1, and by error delta
Compared with crystal grain tolerance rate, if error delta is less than crystal grain tolerance rate, prove that simulation model and analog parameter are accurate；If error is big
It in crystal grain tolerance rate, then proves, proves simulation model and/or analog parameter inaccuracy.
2. the verification method of parameter simulation, feature exist in a kind of copper pipe rolling according to claim 1 and cooling procedure
In: it needs to carry out copper pipe processing to copper pipe fitting in the metallographic experiment, observes and shoot the tissue picture of copper pipe fitting, judge metallographic group
It whether reasonable knits distribution, if copper pipe fitting Tissue distribution is unreasonable, re-starts copper pipe and handle and observe and shoot tissue again
Picture, if copper pipe fitting Tissue distribution is reasonable, specified grain size measurement line segment simultaneously calculates crystal grain line density.
3. the verification method of parameter simulation, feature exist in a kind of copper pipe rolling according to claim 2 and cooling procedure
In: the copper pipe processing is including polishing copper pipe fitting plane using coarse sandpaper and fine sandpaper, using polishing machine to copper pipe fitting metallographic face
Carry out polishing until copper pipe fitting metallographic face light as bronze mirror, use chemical reagent corrode copper pipe fitting metallographic face.
4. a kind of method of parameter simulation in copper pipe rolling and cooling procedure, it is characterised in that: weighed in any one of claim 1-3
In benefit the requirement rolling of a kind of pair of copper pipe and cooling procedure in the verification method of parameter simulation, error in verification process is utilized
Compared with setting tolerance rate, the analog parameter in simulation model and simulation model is determined；
Wherein, if error delta is less than crystal grain tolerance rate, prove that simulation model and/or analog parameter are accurate；If error is greater than crystal grain
Tolerance rate then proves simulation model and/or analog parameter inaccuracy, then adjusts simulation model and/or analog parameter, obtain again
It obtains the grain size of copper pipe fitting test product in simulation process and passes through verification process, repetitive cycling verification process, adjustment process, Zhi Dao
Prove that simulation model and analog parameter are accurate in verification process.
5. the method for parameter simulation in a kind of copper pipe rolling according to claim 4 and cooling procedure, it is characterised in that: its
Include the following steps:
Step 1, parameter obtains
The copper pipe fitting finished product by rolling, cooling procedure is obtained, carries out its grain size of metallographic measuring α 1, and obtain this copper pipe
Plant production processes parameter of the part finished product in rolling, cooling procedure；
Step 2, Building of Simulation Model
According to the parameter that step 1 obtains, the simulation model rolled, in cooling procedure is established on ABAQUS, and determines simulation ginseng
Number；
Step 3, simulation process
Copper pipe fitting test product is selected, is simulated according to the simulation model that step 2 is established, metallographic measuring copper pipe fitting is then carried out
The grain size α 2 of test product；
Step 4, verification process
Crystal grain tolerance rate is set, the error delta of the grain size α 2 in grain size granularity α 1 and step 3 in comparison step 1, and will accidentally
Poor δ, if error delta is less than crystal grain tolerance rate, proves that simulation model and analog parameter are accurate, the method compared with crystal grain tolerance rate
Parameter simulation in copper pipe rolling and cooling procedure is terminated；If error is greater than crystal grain tolerance rate, prove then to prove simulation model
And/or analog parameter is inaccurate, then the simulation model and/or analog parameter in amendment step 2 carry out step 3-4.
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