CN103761374B - A kind of modeling method of Laser Deep Penetration Welding heat source model - Google Patents
A kind of modeling method of Laser Deep Penetration Welding heat source model Download PDFInfo
- Publication number
- CN103761374B CN103761374B CN201410012392.3A CN201410012392A CN103761374B CN 103761374 B CN103761374 B CN 103761374B CN 201410012392 A CN201410012392 A CN 201410012392A CN 103761374 B CN103761374 B CN 103761374B
- Authority
- CN
- China
- Prior art keywords
- heat source
- weld area
- model
- laser
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims abstract description 42
- 230000035515 penetration Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000010964 304L stainless steel Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Landscapes
- Laser Beam Processing (AREA)
Abstract
本发明公开了一种激光深熔焊热源模型的建模方法，建立T型接头实体模型，建模时综合考虑焊缝区材料属性，及网格顺序划分问题将焊缝区建为3个体，盖板焊缝区，空气膜焊缝区，芯板焊缝区；基于ANSYS，顺序划分网格，优先划分焊缝区；建立三维激光深熔焊热源模型，基于ＡＰＤＬ，求解单元热值，热源模型控制方程为：其中，x，y，z为笛卡尔坐标，QM为热源峰值，r1激光找在材料表面的有效半径ｒ2，H1为热源形状参数，Ｈ0热源上部分高度，Ｈ为焊缝实际熔深，按次热源模型求解热值，存储到数组中，基于ANSYS软件，将求解热值，加载到有限元模型的相应单元，设置边界条件，计算求解，完成建模过程。
The invention discloses a modeling method of a laser deep penetration welding heat source model, which establishes a T-shaped joint entity model, considers the material properties of the weld area and the grid order division problem comprehensively when modeling, and builds the weld area into three bodies, Cover plate weld area, air film weld area, and core plate weld area; based on ANSYS, divide the grid sequentially, and divide the weld area first; establish a three-dimensional laser deep penetration welding heat source model, and solve the unit calorific value and heat source based on APDL The governing equation of the model is: Among them, x, y, z are Cartesian coordinates, Q M is the peak value of the heat source, r 1 is the effective radius r 2 of the laser on the surface of the material, H 1 is the shape parameter of the heat source, H 0 is the height of the upper part of the heat source, and H is the actual welding seam For penetration, heat value is solved according to the heat source model, and stored in an array. Based on ANSYS software, the calculated heat value is loaded to the corresponding unit of the finite element model, boundary conditions are set, and the solution is calculated to complete the modeling process.
Description
技术领域technical field
本发明属于激光焊接技术领域，特别涉及激光焊接中深熔焊的热源模型的建模方法。The invention belongs to the technical field of laser welding, in particular to a modeling method for a heat source model of deep penetration welding in laser welding.
背景技术Background technique
激光焊接具有能量集中、深宽比大、热影响区小、变形小、适应能力强、焊接质量高等优点。因此在工业领域得到广泛应用，特别是在汽车、船舶、航空航天的轻量化过程中有着不可替代的优势。激光焊接可以获得较大的深宽比，从而可以实现T型接头的深熔焊。激光焊接涉及激光与材料的相互作用，小孔效应，等离子体效应，材料热物理属性，焊接熔池的传热和传质，等多变量、多耦合现象，系统的实验研究费时、费力。现实中，由于激光的局部加热，在熔池及其附近激光与材料相互作用，数据不可能测量。所以，模拟是激光焊接技术中获取必要信息和预测焊接温度场分布的唯一有效方法。Laser welding has the advantages of energy concentration, large aspect ratio, small heat-affected zone, small deformation, strong adaptability, and high welding quality. Therefore, it is widely used in the industrial field, especially in the lightweight process of automobiles, ships, and aerospace, and has irreplaceable advantages. Laser welding can obtain a large depth-to-width ratio, so that deep penetration welding of T-joints can be realized. Laser welding involves multi-variable and multi-coupling phenomena such as the interaction between laser and material, pinhole effect, plasma effect, material thermophysical properties, heat transfer and mass transfer of welding pool, and systematic experimental research is time-consuming and laborious. In reality, due to the localized heating of the laser, the laser interacts with the material in and around the melt pool, making it impossible to measure the data. Therefore, simulation is the only effective way to obtain necessary information and predict the distribution of welding temperature field in laser welding technology.
建立合理的热源模型是焊接数值模拟结果准确、可靠的前提。对于激光深熔焊来说，激光热量集中，其功率密度高于106W/cm2，可以在极短时间内将金属汽化，形成小孔效应。而小孔类似光学的黑体，射入的激光经多次反射后全部被吸收，此后小孔就像焊接热源一样实现焊接过程。Establishing a reasonable heat source model is the prerequisite for accurate and reliable welding numerical simulation results. For laser deep penetration welding, the laser heat is concentrated, and its power density is higher than 10 6 W/cm 2 , which can vaporize the metal in a very short time to form a small hole effect. The small hole is similar to an optical black body, and the injected laser light is completely absorbed after multiple reflections. After that, the small hole is like a welding heat source to realize the welding process.
发明内容Contents of the invention
本发明旨在模拟激光深熔焊的小孔效应和熔池形状。The invention aims at simulating the pinhole effect and molten pool shape of laser deep penetration welding.
本发明的技术方案是，一种激光深熔焊热源模型的建模方法，包括以下步骤：The technical scheme of the present invention is, a kind of modeling method of laser deep penetration welding heat source model, comprises the following steps:
第一步，建立T型接头实体模型，建模时综合考虑焊缝区材料属性，及网格顺序划分问题将焊缝区建为3个体，盖板焊缝区，空气膜焊缝区，芯板焊缝区；The first step is to establish a solid model of the T-joint. When modeling, the material properties of the weld area and the grid order division problem are considered comprehensively. The weld area is built into three bodies, the cover plate weld area, the air film weld area, and the core Plate weld area;
第二步，基于ANSYS，顺序划分网格，优先划分焊缝区；In the second step, based on ANSYS, the grid is divided sequentially, and the weld area is divided first;
第三步，建立三维激光深熔焊热源模型，基于ＡＰＤＬ，求解单元热值，热源模型控制方程为：The third step is to establish a three-dimensional laser deep penetration welding heat source model, based on APDL, to solve the unit calorific value, and the control equation of the heat source model is:
其中，x，y，z为笛卡尔坐标，QM为热源峰值，r1激光找在材料表面的有效半径ｒ2，H1为热源形状参数，Ｈ0热源上部分高度，Ｈ为焊缝实际熔深，按次热源模型求解热值，存储到数组中，Among them, x, y, z are Cartesian coordinates, Q M is the peak value of the heat source, r 1 is the effective radius r 2 of the laser on the surface of the material, H 1 is the shape parameter of the heat source, H 0 is the height of the upper part of the heat source, and H is the actual welding seam Depth of penetration, solve the heat value according to the heat source model, store it in the array,
第四步，基于ANSYS软件，将求解热值，加载到有限元模型的相应单元，设置边界条件，计算求解，完成建模过程，The fourth step, based on ANSYS software, will solve the heat value, load it into the corresponding unit of the finite element model, set the boundary conditions, calculate the solution, and complete the modeling process.
激光焊接形成的温度场控制方程为：The governing equation of the temperature field formed by laser welding is:
其中ρ是质量密度，Cp比热容，T是温度，t时间，κ是热传导系数，x,y,z是笛卡尔坐标，qLaser激光热源输入的能量，Where ρ is mass density, Cp specific heat capacity, T is temperature, t time, κ is thermal conductivity coefficient, x, y, z are Cartesian coordinates, q Laser heat source input energy,
本发明建立了全新的激光深熔焊热源模型，可以很好地模拟激光深熔焊温度场。基于ＡＰＤＬ，建立实体模型，顺序划分网格，得到有限元模型；编写热源程序代码，计算热值存储于数组；设置边界条件，加载热值，计算求解。得到的Ｔ型接头激光深熔焊温度场与实验得到的结果吻合良好。与以前国内外所用较多热源进行了对比，表明本发明热源更适合激光深熔焊。且熔深越大，效果越明显。The invention establishes a brand-new laser deep penetration welding heat source model, which can well simulate the laser deep penetration welding temperature field. Based on APDL, establish a solid model, divide the grid sequentially, and obtain the finite element model; write the heat source program code, calculate the calorific value and store it in the array; set the boundary conditions, load the calorific value, and calculate the solution. The obtained T-joint laser deep penetration welding temperature field is in good agreement with the experimental results. Compared with many heat sources used at home and abroad before, it shows that the heat source of the present invention is more suitable for laser deep penetration welding. And the greater the penetration, the more obvious the effect.
附图说明Description of drawings
图1是本发明的新型激光焊接体热源模型Fig. 1 is the novel laser welding body heat source model of the present invention
具体实施方式Detailed ways
本发明的具体实施建模步骤：Concrete implementation modeling steps of the present invention:
第一步，建立T型接头实体模型，建模时综合考虑焊缝区材料属性，及网格顺序划分问题将焊缝区建为3个体，盖板焊缝区，空气膜焊缝区，芯板焊缝区。The first step is to establish a solid model of the T-joint. When modeling, the material properties of the weld area and the grid order division problem are considered comprehensively. The weld area is built into three bodies, the cover plate weld area, the air film weld area, and the core Plate weld area.
第二步，基于ANSYS，顺序划分网格。优先划分焊缝区。The second step, based on ANSYS, divides the grid sequentially. Prioritize the division of the weld zone.
第三步，建立三维激光深熔焊热源模型，基于ＡＰＤＬ，求解单元热值。The third step is to establish a three-dimensional laser deep penetration welding heat source model, and solve the unit calorific value based on APDL.
热源模型控制方程为：The governing equation of the heat source model is:
其中，x，y，z为笛卡尔坐标，QM为热源峰值，r1激光找在材料表面的有效半径ｒ2，H1为热源形状参数，Ｈ0热源上部分高度，Ｈ为焊缝实际熔深，按次热源模型求解热值，存储到数组中。Among them, x, y, z are Cartesian coordinates, Q M is the peak value of the heat source, r 1 is the effective radius r 2 of the laser on the surface of the material, H 1 is the shape parameter of the heat source, H 0 is the height of the upper part of the heat source, and H is the actual welding seam Depth of penetration, the calorific value is solved according to the heat source model, and stored in the array.
第四步，基于ANSYS软件，将求解热值，加载到有限元模型的相应单元，设置边界条件，计算求解，完成建模过程。The fourth step, based on ANSYS software, will solve the calorific value, load it into the corresponding unit of the finite element model, set the boundary conditions, calculate the solution, and complete the modeling process.
激光焊接形成的温度场控制方程为：The governing equation of the temperature field formed by laser welding is:
其中ρ是质量密度，Cp比热容，T是温度，t时间，κ是热传导系数，x,y,z是笛卡尔坐标，qLaser激光热源输入的能量。如图1所示，是本发明的新型激光焊接体热源模型。Where ρ is mass density, Cp specific heat capacity, T is temperature, t time, κ is heat conduction coefficient, x, y, z are Cartesian coordinates, q Laser heat source input energy. As shown in Figure 1, it is a novel laser welding body heat source model of the present invention.
本发明的实验验证过程，选用的焊接工艺参数为激光功率Q=4500W，焊接速度V=25mm/s，激光的吸收效率为η=0.9，热源模型在材料表面的有效光斑半径r0=0.7mm，热源模型高度H=5.3mm，保护气体选用純氩，20L/min。In the experimental verification process of the present invention, the welding process parameters selected are laser power Q=4500W, welding speed V=25mm/s, the absorption efficiency of the laser is η=0.9, and the effective spot radius r0=0.7mm of the heat source model on the material surface, The height of the heat source model is H=5.3mm, and the protective gas is pure argon at 20L/min.
使用材料为304L不锈钢，其熔点为1450℃，沸点为2800℃。The material used is 304L stainless steel with a melting point of 1450°C and a boiling point of 2800°C.
使用ＩＰＧ ＹＬＳ－5000型激光器，ＫＵＫＡ ＫＲ60ＨＡ六轴机器人，实施焊接。Use IPG YLS-5000 laser and KUKA KR60HA six-axis robot to carry out welding.
基于ＡＮＳＹＳ二次开发技术，实现参数化建模，选用典型的ｓｏｌｉｄ70热实体单元，采用非均匀划分技术划分网格；应用数组存储和矢量计算，实现参数化加载求解。Based on the secondary development technology of ANSYS, the parametric modeling is realized, the typical solid70 thermal solid element is selected, and the mesh is divided by the non-uniform division technology; the array storage and vector calculation are applied to realize the parametric loading solution.
最后，应用国内外常用热源模型，使用同一台计算机，采用同样的算法，模拟Ｔ型接头激光深熔焊。Finally, using the common heat source model at home and abroad, using the same computer, using the same algorithm, simulate T-joint laser deep penetration welding.
本发明与国内外常用热源相比可获得更好的熔宽、熔深，熔池形状与实验焊缝更吻合。Compared with common heat sources at home and abroad, the invention can obtain better melting width and penetration depth, and the shape of the melting pool is more consistent with the experimental welding seam.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410012392.3A CN103761374B (en) | 2014-01-10 | 2014-01-10 | A kind of modeling method of Laser Deep Penetration Welding heat source model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410012392.3A CN103761374B (en) | 2014-01-10 | 2014-01-10 | A kind of modeling method of Laser Deep Penetration Welding heat source model |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103761374A CN103761374A (en) | 2014-04-30 |
| CN103761374B true CN103761374B (en) | 2018-07-24 |
Family
ID=50528610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410012392.3A Expired - Fee Related CN103761374B (en) | 2014-01-10 | 2014-01-10 | A kind of modeling method of Laser Deep Penetration Welding heat source model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103761374B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105550434B (en) * | 2015-12-10 | 2018-08-03 | 南车株洲电力机车有限公司 | A kind of locomotive car body lightweight optimization method |
| CN105718690A (en) * | 2016-01-26 | 2016-06-29 | 南京航空航天大学 | Laser 3D printing molten bath solidification behavior numerical simulation method based on time and space active tracking |
| CN106670666A (en) * | 2016-12-14 | 2017-05-17 | 南京航空航天大学 | Construction method of energy distribution coefficient model of laser-electric-arc combined machining based on precise energy distribution |
| CN107649804B (en) * | 2017-10-17 | 2023-06-23 | 华中科技大学鄂州工业技术研究院 | An Online Detection and Control System of Additive Manufacturing Penetration Depth |
| CN109522610A (en) * | 2018-10-25 | 2019-03-26 | 南京航空航天大学 | A kind of weld metal zone mixing crystalline region finite element modeling method |
| CN109933007A (en) * | 2019-01-30 | 2019-06-25 | 中国科学院金属研究所 | A Method for Establishing Heat Source Model of Laser-MIG Hybrid Welding |
| CN112496614B (en) * | 2020-12-17 | 2022-09-13 | 上海工程技术大学 | Method for obtaining finite element simulation heat source model of deep fusion welding |
-
2014
- 2014-01-10 CN CN201410012392.3A patent/CN103761374B/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| T型接头焊接温度场与应力场的数值模拟;毕艳霞;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑（月刊）》;20080615;第2008年卷(第6期);第B022-91页摘要 * |
| 激光深熔焊接热源模型的研究进展;熊智军 等;《焊接》;20061231(第12期);第12-16页第2节 * |
| 激光穿透焊温度场及流动场的数值模拟;杜汉斌等;《焊接学报》;20051231;第26卷(第12期);第1033-1041页 * |
| 铝合金T型接头激光+GMAW复合热源焊温度场的有限元分析;胥国祥 等;《金属学报》;20120930;第48卷(第9期);第65-68、100页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103761374A (en) | 2014-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103761374B (en) | A kind of modeling method of Laser Deep Penetration Welding heat source model | |
| Tseng et al. | Simulation study on laser cladding on preplaced powder layer with a tailored laser heat source | |
| Wang et al. | Process modeling in laser deposition of multilayer SS410 steel | |
| Kong et al. | 3D finite element modeling of the thermally induced residual stress in the hybrid laser/arc welding of lap joint | |
| CN108038266A (en) | A kind of method for numerical simulation of selective laser repair process | |
| CN112149330B (en) | Welding residual stress prediction and welding process optimization method for wind power tower oil seal platform | |
| Marimuthu et al. | Coupled computational fluid dynamic and finite element multiphase modeling of laser weld bead geometry formation and joint strengths | |
| Zhou et al. | Robust optimization for reducing welding-induced angular distortion in fiber laser keyhole welding under process parameter uncertainty | |
| CN103020373A (en) | Method for simulating steel/aluminum laser welding temperature field based on ProCAST numerical value | |
| Kubiak et al. | Numerical prediction of fusion zone and heat affected zone in hybrid Yb: YAG laser+ GMAW welding process with experimental verification | |
| CN105740577A (en) | Invar steel PMIG weaving welding temperature field and deformation simulation method | |
| Casalino et al. | Finite element model for laser welding of titanium | |
| CN115213549A (en) | Multi-pass laser processing method, system, device and storage medium | |
| Ismail et al. | Thermal analysis on a weld joint of aluminium alloy in gas metal arc welding. | |
| Mi et al. | A thermal–metallurgical model of laser beam welding simulation for carbon steels | |
| Shubert et al. | An Abaqus extension for 3-D welding simulations | |
| Marimuthu et al. | Numerical simulation of excimer laser cleaning of film and particle contaminants | |
| Bauer et al. | Numerical simulation and calibration of a single seam WAAM process with a commercial and an open source software | |
| Akella et al. | Heat flux for welding processes: model for laser weld | |
| CN117252000A (en) | Heat source model construction method, system and simulation method for electron beam tilt welding | |
| CN103530455A (en) | Method for predicating t[8/5] value of fusion zone in underwater wet welding | |
| Babalová et al. | Numerical simulation of temperature fields by welding of Ti-Al alloys applying volumetric heat source | |
| Ahsan et al. | Multi-physics modeling of laser interaction with surface in powder bed melting process | |
| Javid et al. | A Three-Dimensional Heat Transfer Simulation of Laser Full Penetration Welding of Rene-80 Super Alloy. | |
| Tongov | Heat Source for TIG welding modelling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Peilei Inventor after: Chu Zhentao Inventor after: Yang Gansheng Inventor after: Ma Kai Inventor after: Zhang Wenrui Inventor after: Lu Yunlong Inventor after: Shi Haichuan Inventor after: Yu Zhishui Inventor before: Chu Zhentao Inventor before: Yang Gansheng Inventor before: Ma Kai Inventor before: Zhang Wenrui Inventor before: Lu Yunlong Inventor before: Shi Haichuan Inventor before: Yu Zhishui Inventor before: Zhang Peilei |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 |