CN105740536B - The analogy method of dynamic simulation is carried out to straight seam welded pipe intermediate frequency heat treatment process - Google Patents
The analogy method of dynamic simulation is carried out to straight seam welded pipe intermediate frequency heat treatment process Download PDFInfo
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- 238000004458 analytical method Methods 0.000 claims abstract description 55
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- 238000004088 simulation Methods 0.000 claims abstract description 16
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- 238000010168 coupling process Methods 0.000 claims abstract description 8
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- 238000013500 data storage Methods 0.000 claims description 4
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- 239000003532 endogenous pyrogen Substances 0.000 claims description 3
- 108010052620 leukocyte endogenous mediator Proteins 0.000 claims description 3
- 238000002076 thermal analysis method Methods 0.000 claims description 2
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F30/30—Circuit design
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Abstract
The invention discloses a kind of analogy method carrying out dynamic simulation to straight seam welded pipe intermediate frequency heat treatment process, which replaces the movement of welded tube in actual production by the movement of induction coil, has write the macro document library based on ANSYS APDL language, including:A) library is controlled, is used for macro document in control parameter library and executes sequence；B) parameter library includes modeling parameters and load parameter of the coil in different location；C) enviroline, for establishing geometrical model, mesh generation, load application and the solution type etc. needed for two physical environments of emi analysis and heat analysis；D) calculating library carries out the electromagnetism thermal coupling calculating of sensing heating process using DO cycles, and solving result is stored into database.Compared with existing emulation technology, the present invention can carry out straight seam welded pipe intermediate frequency heat treatment process dynamic simulation, simulation more closer to reality；Only by changing parameter, the various production technologies of factory can be simulated；For entire simulation process using ANSYS softwares as platform, automatic operating is easy to operate, and factory technician is facilitated to grasp and use.
Description
Technical field
The invention belongs to induction heat treatment research field, be related to it is a kind of to straight seam welded pipe intermediate frequency heat treatment process into Mobile state
The analogy method of emulation.
Background technology
Induction heat treatment technology is the fuel factor using inductive loop, required for so that workpiece is heated in a short period of time
Temperature.Since it has many advantages, such as energy saving, quick heating and can carry out selective hardening to workpiece, which is widely used in
The industrial circles such as metallurgical machinery, oil-well rig and automobile making.The metallurgical quality and performance of welded still pipe depend on tube body
Metallurgical quality, the technology of tubulation welding and three factors of heat treatment of weld seam of steel.As high intensity, high tenacity are welded
The extensive use of pipe, requiring the metallurgical quality of weld seam can be more stringent.Therefore intermediate frequency heat treatment is carried out to straight seam welded pipe to grind
It is meaningful to study carefully.
The performance of welded tube is evaluated by the performance synthesis of tube body and weld seam two parts metal, either party is most weak
Item will all determine the performance of welded tube.When carrying out high-frequency welding, the temperature at pipe edge drastically increases welded tube, attached in weld seam
Near field generates prodigious temperature gradient.It is such as heat-treated without intermediate frequency, heating zone can form hard and crisp thick after welding is cooling
Grain structure, while prodigious residual stress is generated, so that the structure property of weld metal zone is generated prodigious difference with tube body, this is serious
It affects the service life of welded tube and there are great security risks.For this purpose, in actual production process, welded tube passes through high frequency
It is required for carrying out intermediate frequency heat treatment after welding, the performance difference between weld metal zone and base material is eliminated with this.
Straight seam welded pipe is a continuous process in actual production, and welded tube is directly carrying out online after high-frequency welding
Induction heat treatment, entire production process welded tube move with uniform velocity always in an axial direction.Straight seam welded pipe intermediate-frequency heat treatment process is carried out
Analog simulation is broadly divided into two methods：It is related with displacement by solving one is according to displacement (s)=speed (v) × time (t)
The problem of be converted into and solve matter of time under constant speed；Another kind is heat source moving method, passes through the heat emi analysis
Source is moved as load, with the relative motion of this simulation workpiece and inductor.Design of the first emulation mode to program
It is relatively low with edit request, it applies at present relatively broad.But entire simulation process do not have it is opposite between induction coil and welded tube
Movement, does not fully consider the heat transfer of commissure axial direction, therefore there are certain errors for this emulation mode.Second
Emulation mode simplifies electromagnetic field and the coupling process in temperature field, and prodigious situation is varied with temperature in permeability or conductance
Maximum error can be brought when lower use the method.
Since weld seam heat treatment process is an essential technique in ratio-frequency welded tube production process, it is contemplated that weld seam
After final mass is influenced by many technological parameters, therefore use FInite Element under different technical parameters to being heat-treated
Weldquality carries out forecast simulation, to take corresponding technological parameter to ensure weldquality in process of production.
Invention content
The present invention overcomes deficiency in the prior art, provides and a kind of straight seam welded pipe intermediate frequency is heat-treated based on ANSYS
Process carries out the analogy method of dynamic simulation.The present invention is that induction coil is carried out step-by-step movement movement, and coil adds in a certain position
The next position is stepped to after heat.This emulation mode is realized dynamic by the relative motion between induction coil and welded tube
Morphotype is quasi-, and more close to the true condition of production, therefore which is to carry out the mainstream of dynamic simulation from now on.This emulation mode by
In the continuous movement of induction coil, therefore repeatedly to be modeled again, mesh generation, create physical environment, solution etc..Only according to
Manually realize the above action, it is time-consuming and laborious, therefore a set of program is designed, so that computer is automatically performed and entirely emulated
The calculating of journey is particularly important.
In order to solve above-mentioned technical problem, sensing heating is carried out for induction coil is carried out step-by-step movement movement
Process, the present invention is achieved by the following technical solutions：
A kind of analogy method carrying out dynamic simulation to straight seam welded pipe intermediate frequency heat treatment process, this method content includes following
Step：
Step 1, control library is executed, which is that the execution sequence of macro document in foundation parameter library is compiled
It writes；
Step 2, parameter library is executed, which includes：It is produced according to straight seam welded pipe intermediate-frequency induction heating
Device determines modeling parameters；The movement time of induction coil is determined according to the length of each displacement distance of induction coil and required movement
Number；According to the load of induction coil in production, the load of application is parameterized；
Step 3, performing environment library, the environment library package include：Geometrical model is established under corresponding parameter, is divided
Grid applies load and boundary condition, determines and solves type；Different electromagnetism is created according to the loading condition of two induction coils
Physical environment is analyzed, to realize the purpose of two induction coil Welded Pipes while sensing heating；Create heat analysis physical environment pair
Entire welded tube carries out Transient Thermal Analysis；
Step 4, it executes and calculates library, which includes：The electricity for carrying out sensing heating process is recycled using DO
Magnetic-thermal coupling calculates；In the result data storage to database that emi analysis and heat analysis are generated；
Step 5, step 1~step 4 is repeated, until induction coil completes the sensing heating to entire welded tube, is realized to straight
The dynamic simulation of seam welded tube intermediate frequency heat treatment process；By using nested macro document between each step, establish macro document library it
Between contact, reach entire simulation process automatic operating.
In step 2, the load of the induction coil refers to power frequency and current density.
In step 3, described two induction coils refer to two lines of induction of arrangement on the axial direction right over weld seam
Circle, come realize to weld seam carry out twice Frequency Induction Heating to achieve the purpose that heat treatment temperature.
In step 3, the different electromagnetism physical environment of the establishment refers to using the side for establishing different electromagnetism physical environments
Method realizes that two coils with different power frequencies carry out sensing heating to straight seam welded pipe simultaneously.
In step 4, refer to application in the result data storage to database that emi analysis and heat analysis are generated
APDL parametric Finite Element Analysis technologies write corresponding program, create the database for storing emi analysis and heat analysis,
It realizes and required result is stored in database after the completion of analyzing every time.
The application APDL parametric Finite Element Analysis technologies write corresponding program and refer to：Realize emi analysis and heat point
Data transfer between analysis；APDL programs are write, Joule heat caused by emi analysis is extracted from database, as
Endogenous pyrogen is applied in heat analysis；Temperature caused by heat analysis is extracted from database, is applied as initial load
Into emi analysis, realize that the electromagnetism thermal coupling of sensing heating process calculates.
Due to the adoption of the above technical scheme, the present invention can reach such advantageous effect compared with prior art：This hair
It is bright to carry out dynamic simulation to straight seam welded pipe intermediate frequency heat treatment process, the various production technologies of factory can be simulated, simulation is more sticked on
Nearly reality；The present invention can be directed to different intermediate-frequency heat treatment process into Mobile state by changing the technological parameter in parameter library
Emulation；By changing the welded tube model parameter in parameter, the dynamic of sensing heating process can be carried out to the welded tube of different size
Emulation；Relative motion between welded tube and induction coil is realized using the method for step-by-step movement sensing heating, make simulation more close to
Reality；For entire simulation process using ANSYS softwares as platform, simulation process automatic operating is easy to operate, facilitates plant technology people
Member grasps and uses.
Description of the drawings
Fig. 1 is that the program of implementation process of the present invention executes schematic diagram；
Fig. 2 is the straight seam welded pipe sensing heating FEM Simulation flow chart of the present invention；
Fig. 3 is the geometrical model schematic diagram established according to straight seam welded pipe intermediate-frequency heat treatment process；
Fig. 4 is the FEM model schematic diagram carried out to geometrical model shown in Fig. 3 after mesh generation；
Fig. 5 is mesh generation schematic diagram at welded tube welding seam；
Fig. 6 is the straight seam welded pipe sensing heating process schematic of the present invention.
Specific implementation mode
Present invention is further described in detail with specific implementation mode below in conjunction with the accompanying drawings：
The present invention carries out dynamic simulation for the intermediate frequency heat treatment process of straight seam welded pipe, needs the temperature after high-frequency welding
Field is as initial temperature field.Apply the temperature after high-frequency welding first on the node of the built entire axial length of weld seam model to carry
Lotus；Then element birth and death technology is used again, gradually activates the unit of welded tube axial direction to participate in calculating, every time selection activation
Unit determined by the distance of each stepping of induction coil during Coupled Electromagnetic-Thermal.It in this way can be accurate
The temperature field after high-frequency welding is inherited, to ensure the accuracy of analog result.
Under the premise of ensureing to influence less simulated target, the present invention does following hypothesis：1) specific heat capacity and thermal coefficient
It is the function of temperature；2) heat transfer between welded tube and environment is carried out with radiating with convection current two ways；3) false in heat analysis
If coil and air are temperature-resistant perfect condition.
Technical solution for a better understanding of the present invention, with reference to the accompanying drawings and examples, the specific implementation to the present invention
Mode is described in further detail.Electromagnetic induction heating now is carried out to the welded tube that specification is 219 × 8.94mm of Φ, material is J55,
The analogue simulation to intermediate-frequency heat treatment process is realized with the method for the present invention.The program that Fig. 1 show implementation process of the present invention is held
Row schematic diagram.The straight seam welded pipe sensing heating FEM Simulation flow chart of analogy method of the present invention is as shown in Figure 2；Main packet
Include following steps：
1. executing the program in control library, the specified macro document being stored in parameter library；
2. executing the program in parameter library, model parameter and load parameter of the reading induction coil in specific location；
3. the program in performing environment library, which includes establishing finite element model, creates emi analysis and heat analysis object
Environment is managed, steps are as follows：
The front processor establishment straight seam welded pipe of 3.1 utilization ANSYS, the 3D solid mould of induction coil, silicon steel sheet and air
Type is the geometrical model schematic diagram established according to straight seam welded pipe intermediate-frequency heat treatment process as shown in Figure 3；
3.2 in this embodiment, when mesh generation the cell type that uses of each entity and material properties it is as shown in table 1, Fig. 4
Shown is the FEM model schematic diagram carried out to geometrical model shown in Fig. 3 after mesh generation；When Frequency Induction Heating welded tube, by
In the kelvin effect of vortex, approach effect and ring-around, the effect of silicon steel sheet is added, induction coil motivates the vortex come
It is concentrated mainly in collection skin layers, therefore when carrying out mesh generation to weld metal zone, closer to induction coil, division is closeer, with suitable
It should be vortexed the regularity of distribution with temperature region in this section, be illustrated in figure 5 mesh generation schematic diagram at welded tube welding seam；
1 emi analysis of table and the cell type and material properties needed for heat analysis
When 3.3 establishment emi analysis physical environment, the relative magnetic permeability for reading in welded tube in 20 DEG C of -1400 DEG C of temperature ranges is needed
The curve that rate, resistivity, the relative permeability of induction coil and the relative permeability of air vary with temperature；For calculate by
Welded tube unit forms the vortex of ferromagnetic domain, and degree of freedom is set as AZ and VOLT, for forming non-whirlpool by coil, bar magnet and air element
Area is flowed, degree of freedom is set as AZ；The specified type that solves is harmonic responding analysis；On the outmost air-shed boundary of model, magnetic force is set
Line parallel boundary condition indicates that magnetic line of force normal component is zero, i.e. AZ=0；It is equal when alternating current is by the inside of induction coil
Even distribution, therefore the loading current Density Vector on induction coil inside cell, and the frequency model in specified harmonic responding analysis
It encloses.Since two induction coils have different power frequency and current density, it is therefore desirable to which two induction coils are respectively created
Respective emi analysis physical environment；
3.4 create heat analysis physical environment when, need read in 20 DEG C of -1400 DEG C of temperature ranges in welded tube thermal coefficient,
Specific heat capacity, density, the curve that heat emissivity coefficient, the Boltzmann's constant of surface of welded pipe vary with temperature；Specified method for solving is wink
State is analyzed；Apply heat convection load on straight seam welded pipe surface；Load step in solution procedure is configured；
4. executing the program calculated in library, which is the coupling realized using the method for sequence coupling between electromagnetism-heat
It calculates, steps are as follows：
4.1 read in emi analysis physical environment when Line 1 circle is activated from the physical environment created, apply temperature field
As the primary condition of emi analysis, the physical parameter of material being determined, carrying out emi analysis, heat of the output under the electromagnetic field is raw
At rate；
4.2 read in emi analysis physical environment when No. 2 coils are activated from the physical environment created, apply identical
Temperature field determines the physical parameter of material, carries out emi analysis, and output is thermally generated rate under the electromagnetic field；
4.3 read in heat analysis physical environment from the physical environment created, will twice heat caused by emi analysis it is raw
At the sum of rate as the endogenous pyrogen input needed for thermal field, apply temperature field identical with emi analysis, determines the physical property ginseng of material
Number carries out heat analysis, obtains the thermo parameters method of welded tube；
4.4 realize the cycle calculations of electromagnetic field and thermal field using DO cycles, until reaching what coil was set at this position
Heating time；
4.5, by emi analysis and the storage to database of heat analysis solving result, remove the model in ANSYS, read again
The program for entering to control library establishes new geometrical model.So circulation is gone down, until completing Frequency Induction Heating to entire welded tube.Figure
6 show the straight seam welded pipe sensing heating process schematic of the present invention.
Claims (5)
1. a kind of analogy method carrying out dynamic simulation to straight seam welded pipe intermediate frequency heat treatment process, it is characterised in that this method content
Include the following steps：
Step 1, control library is executed, which is that the execution sequence of macro document in foundation parameter library is write
's；
Step 2, parameter library is executed, which includes：According to straight seam welded pipe intermediate-frequency induction heating process units
Determine modeling parameters；The mobile number of induction coil is determined according to the length of each displacement distance of induction coil and required movement；
According to the load of induction coil in production, the load of application is parameterized；
Step 3, performing environment library, the environment library package include：Geometrical model is established under corresponding parameter, divides net
Lattice apply load and boundary condition, determine and solve type；Different electromagnetism point is created according to the loading condition of two induction coils
Physical environment is analysed, to realize the purpose of two induction coil Welded Pipes while sensing heating；Heat analysis physical environment is created to whole
A welded tube carries out Transient Thermal Analysis；
Step 4, it executes and calculates library, which includes：Electromagnetism-the heat for carrying out sensing heating process is recycled using DO
Coupling calculates；In the result data storage to database that emi analysis and heat analysis are generated；
Step 5, step 1~step 4 is repeated, until induction coil completes the sensing heating to entire welded tube, is realized to straight weld
The dynamic simulation of pipe intermediate frequency heat treatment process；By using nested macro document between each step, establish between macro document library
Contact, reaches entire simulation process automatic operating.
2. a kind of analogy method carrying out dynamic simulation to straight seam welded pipe intermediate frequency heat treatment process according to claim 1,
It is characterized in that：In step 2, the load of the induction coil refers to power frequency and current density.
3. a kind of analogy method carrying out dynamic simulation to straight seam welded pipe intermediate frequency heat treatment process according to claim 1,
It is characterized in that：In step 3, described two induction coils refer to that two senses are arranged on the axial direction right over weld seam
Answer coil, come realize to weld seam carry out twice Frequency Induction Heating to achieve the purpose that heat treatment temperature；The establishment is different
Emi analysis physical environment refers to realizing two with different power frequencies using the method for establishing different electromagnetism physical environments
A coil carries out sensing heating to straight seam welded pipe simultaneously.
4. a kind of analogy method carrying out dynamic simulation to straight seam welded pipe intermediate frequency heat treatment process according to claim 1,
It is characterized in that：In step 4, in the result data storage to database that emi analysis and heat analysis are generated, refer to
Corresponding program is write using APDL parametric Finite Element Analysis technologies, creates the data for storing emi analysis and heat analysis
Library is realized and required result is stored in database after the completion of analyzing every time.
5. a kind of analogy method carrying out dynamic simulation to straight seam welded pipe intermediate frequency heat treatment process according to claim 4,
It is characterized in that：The application APDL parametric Finite Element Analysis technologies write corresponding program and refer to：Realize emi analysis and
Data transfer between heat analysis；APDL programs are write, Joule heat caused by emi analysis is extracted from database,
It is applied in heat analysis as endogenous pyrogen；Temperature caused by heat analysis is extracted from database, as initial load
It is applied in emi analysis, realizes that the electromagnetism thermal coupling of sensing heating process calculates.
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| CN107169167A (en) * | 2017-04-18 | 2017-09-15 | 燕山大学 | A kind of analogy method to ERW steel-pipe welding process burr form dynamic simulations |
| CN107742030B (en) * | 2017-10-23 | 2020-05-12 | 燕山大学 | Simulation method for intermediate frequency heating and pulse current application of TP2 internal thread copper pipe |
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| CN109971940B (en) * | 2019-04-26 | 2020-04-28 | 燕山大学 | Device and method for heating straight welded pipe by discrete coil |
| CN110162897B (en) * | 2019-05-28 | 2020-10-02 | 燕山大学 | Optimization method for heating magnetizer of large-diameter bent pipe |
| CN112685938B (en) * | 2020-12-28 | 2022-03-15 | 燕山大学 | Quality control method for high-frequency straight welded pipe |
| CN113204848B (en) * | 2021-05-18 | 2022-03-15 | 燕山大学 | Numerical simulation method for induction heating process of large-modulus rack |
| CN113361157B (en) * | 2021-05-27 | 2022-06-24 | 燕山大学 | Motion simulation method for electromagnetic heat treatment of offshore oil steel pipe |
| CN114117869B (en) * | 2021-12-09 | 2024-05-07 | 燕山大学 | Finite element simulation method for multi-frequency induction quenching heating under workpiece motion state |
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| CN104694716A (en) * | 2015-03-10 | 2015-06-10 | 扬中市盛达电器制造有限责任公司 | Pipeline welding heat treatment intermediate frequency induction heating technology and device |
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