CN110110378B - Method for rapidly detecting sticking property of complex curved surface - Google Patents
Method for rapidly detecting sticking property of complex curved surface Download PDFInfo
- Publication number
- CN110110378B CN110110378B CN201910283948.5A CN201910283948A CN110110378B CN 110110378 B CN110110378 B CN 110110378B CN 201910283948 A CN201910283948 A CN 201910283948A CN 110110378 B CN110110378 B CN 110110378B
- Authority
- CN
- China
- Prior art keywords
- curved surface
- complex curved
- die
- rapidly detecting
- sticking property
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- 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
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a method for rapidly detecting the mold sticking performance of a complex curved surface, which comprises the steps of firstly drawing a mold model in three-dimensional drawing software, and secondly introducing an entity model into finite element analysis software to perform punch forming simulation on a part to obtain an FLD (flash laser) image; and performing post-processing on the solved result file, and cutting the molded part at intervals of 45 degrees along the counterclockwise direction to obtain 4 important cutting surfaces. And finally, quantifying according to the distance between two points which are opposite to each other according to the one-to-one mapping relation between the point on the cutting line and the point on the convex die, and obtaining the die attaching data of the plate through finite element simulation software to simulate the die attaching state under the real condition. The forming effect of the workpiece is described more quickly and accurately, so that the level and the quality of the workpiece are improved.
Description
Technical Field
The invention relates to the field of sheet stamping precision, in particular to a method for rapidly detecting the die attaching performance of a complex curved surface.
Background
The automobile manufacturing industry has occupied a very high proportion of industries in the whole country with the improvement of the national standard of living since the new century. Most panels in automobiles are stamped from sheet metal. There are therefore high demands on the precision and quality of the stamping.
Because the traditional mould design mostly depends on empirical formula, the fault tolerance is lower on the novel molded surface. With the development of computer aided design technology based on CAE technology, the numerical simulation is developed vigorously, a great amount of the design is applied to the design trial of the die, and the reliability is improved to 95%.
The ability of a blank to take the shape of a die while drawing a part having a complex curved surface is referred to as conformability. The traditional sticking model property inspection depends on an experienced mould engineer and is time-consuming and labor-consuming, and the obtained data is often large in error. Based on the finite element numerical simulation technology, the die attaching condition can be rapidly observed through the post-processing module, and the die attaching performance can be accurately and specifically measured. Provides a new idea and method for improving the process precision.
Disclosure of Invention
The invention aims to solve the problems that a part with a complex curved surface is long in detection time and inaccurate in detection of the sticking property, and provides a method for rapidly detecting the sticking property of the complex curved surface.
The technical scheme adopted by the invention for solving the technical problem is as follows: a method for rapidly detecting the sticking property of a complex curved surface is realized by the following steps:
the method comprises the following steps: establishing a three-dimensional solid model according to the geometric dimension of the mold to be designed, and importing the model into finite element software for molding simulation to obtain an FLD image;
step two: carrying out post-processing analysis on the simulated file, carrying out anticlockwise sectioning on the complex curved surface which is difficult to form, and sectioning at an interval of 45 degrees for 4 times to obtain a sectioning line;
step three: marking a plurality of points on the section line plate material at equal distances, and recording the distances;
step four: marking a plurality of points on the section line male die at equal distances, and recording the distances;
step five: and (3) mapping a target point on the section line on the convex die by combining a finite element discretization idea to obtain an ideal point, representing the die attaching performance by using the distance between the target point and the ideal point, and quantifying the concrete degree of the curved surface die attaching through a relational expression, wherein the closer the die attaching performance is to 100%, the better the die attaching performance is, and the worse the die attaching performance is otherwise.
The method as claimed in claim 1, wherein the three-dimensional solid model of step one is in the. Iges format.
The method for rapidly detecting the mold sticking property of the complex curved surface according to claim 1, wherein the cutting position in the second step is a part of the complex curved surface, which has a high bulge and is difficult to stick a mold.
The method for rapidly detecting the sticking property of the complex curved surface according to claim 1, wherein the cutting angle in the step two is counterclockwise 0 °, 45 °, 90 ° and 135 °.
The method for rapidly detecting the sticking property of the complex curved surface according to claim 1, wherein the quantization is performed through a relational expression in the fifth step, and the specific relational expression is as follows:
wherein eta represents the sticking property, and the actual distance between the target point and the ideal point is defined as A i And the projection distance from the node on the male die to the starting position of the plate is defined as B i And n is the number of nodes.
The invention has the beneficial effects that: the invention relates to a method for rapidly detecting the sticking performance of a complex curved surface, which uses a post-processing module of finite element software to rapidly and accurately obtain a plurality of section lines of any section of a part, and then obtains a specific numerical value of the sticking performance by combining the relation between the sticking performance and each node according to the distance from the node on the section line to the corresponding node on a convex die. The method greatly improves the accuracy of the die attaching performance evaluation, and provides another reference way for optimizing the process parameters.
Drawings
FIG. 1 is an iges format fender model;
FIG. 2 is a 0 cut;
FIG. 3 is a 45 ° cut;
FIG. 4 is a 90 ° cut;
fig. 5 is a 135 ° cut.
Detailed Description
The embodiment is a rapid detection method for the mold sticking property based on a complex curved surface. The method adopts a case model as an automobile fender, and the specific detection steps are realized by the following steps:
the method comprises the following steps: establishing a three-dimensional solid model according to the geometric dimension of the mold to be designed, and importing the model into finite element software for molding simulation to obtain an FLD image;
step two: carrying out post-processing analysis on the simulated file, carrying out anticlockwise sectioning on the complex curved surface which is difficult to form, sectioning at an interval of 45 degrees, and sectioning for 4 times to obtain a sectioning line;
step three: marking a plurality of points on the section line plate material at equal distances, and recording the distances;
step four: marking a plurality of points on the section line male die at equal distances, and recording the distances;
step five: and (3) mapping a target point on the section line on the convex die by combining a finite element discretization idea to obtain an ideal point, representing the die attachment by using the distance between the target point and the ideal point, wherein the closer the die attachment is to 100%, the better the die attachment is, and the worse the die attachment is.
The relation between the sticking model property and each mapping node is as follows:
wherein eta represents the sticking model property, and the actual distance between the target point and the ideal point is defined as A i And the projection distance from the node on the male die to the starting position of the plate is defined as B i And n is the number of nodes.
The method is used for detecting the bonding condition of the fender punch and the plate when the punched fender punch is not rebounded. The fender model file in the iges format and shown in the figure 1 is imported into numerical simulation software to be selected and automatically set, and the fender model file is submitted to an LS-dyna solver to be solved after the setting is finished. And after the solution is completed, opening the post-processing module, observing an FLD image of the post-processing module, and selecting a part which is difficult to form for sectioning. The cutting is carried out anticlockwise, and the cutting angles are respectively 0 degrees, 45 degrees, 90 degrees and 135 degrees. The cutting lines shown in fig. 2, 3, 4 and 5 were obtained.
To the sticking moldThe sufficient place is that the equal distance on the terrace die picks the point that the reflection is on the sheet material in the direction of the z axle. The distance between two points on the male die is defined as A i The distance between the upper and lower opposite points of the plate and the male die is defined as B i By measuring to obtain A i And B i Substituting the data into a formula to obtain a relational expression between the sticking property and each point, wherein the relational expression is as follows:
wherein eta represents the sticking property, and the actual distance between the target point and the ideal point is defined as A i And the projection distance from the node on the convex die to the starting position of the plate is defined as B i And n is the number of the nodes, and the sticking performance of the left upper corner of the fender is calculated to be 78% by substituting the number into a formula, which indicates that the sticking effect is not ideal.
Claims (5)
1. A method for rapidly detecting the sticking property of a complex curved surface is characterized by comprising the following steps:
the method comprises the following steps: establishing a three-dimensional solid model according to the geometric dimension of the mold to be designed, and importing the model into finite element software for molding simulation to obtain an FLD image;
step two: carrying out post-processing analysis on the simulated file, carrying out anticlockwise sectioning on the complex curved surface which is difficult to form, and sectioning at an interval of 45 degrees for 4 times to obtain a sectioning line;
step three: marking a plurality of points on the section line plate material at equal distances, and recording the distances;
step four: marking a plurality of points on the section line male die at equal distances, and recording the distances;
step five: and (3) mapping a target point on the section line on the convex die by combining a finite element discretization idea to obtain an ideal point, representing the die attaching performance by using the distance between the target point and the ideal point, and quantizing the concrete degree of the curved surface die attaching through a relational expression, wherein the closer the die attaching performance is to 100%, the better the die attaching performance is, and the worse the die attaching performance is.
2. The method for rapidly detecting the sticking property of the complex curved surface according to claim 1, wherein the three-dimensional solid model in the step one is in an iges format.
3. The method for rapidly detecting the sticking property of the complex curved surface according to claim 1, wherein the cutting position in the second step is a part of the complex curved surface, which has a high bulge and is difficult to stick.
4. The method for rapidly detecting the sticking property of the complex curved surface according to claim 1, wherein the cutting angle in the step two is counterclockwise 0 °, 45 °, 90 ° and 135 °.
5. The method for rapidly detecting the sticking property of the complex curved surface according to claim 1, wherein the quantization is performed through a relational expression in the fifth step, and the specific relational expression is as follows:
wherein eta represents the sticking model property, and the actual distance between the target point and the ideal point is defined as A i And the projection distance from the node on the male die to the starting position of the plate is defined as B i And n is the number of nodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283948.5A CN110110378B (en) | 2019-04-10 | 2019-04-10 | Method for rapidly detecting sticking property of complex curved surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283948.5A CN110110378B (en) | 2019-04-10 | 2019-04-10 | Method for rapidly detecting sticking property of complex curved surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110110378A CN110110378A (en) | 2019-08-09 |
| CN110110378B true CN110110378B (en) | 2022-12-20 |
Family
ID=67484063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910283948.5A Active CN110110378B (en) | 2019-04-10 | 2019-04-10 | Method for rapidly detecting sticking property of complex curved surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110110378B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672637A (en) * | 2009-09-24 | 2010-03-17 | 华东理工大学 | Digitizing detection method of complicated curved face |
| CN103514325A (en) * | 2013-09-18 | 2014-01-15 | 华侨大学 | Finite element numerical simulation method of spoke three-spinning-roller dip-separation powerful spinning technology |
| CN103861933A (en) * | 2014-04-01 | 2014-06-18 | 湖南大学 | Corrugated pipe forming device and corrugated pipe machined through corrugated pipe forming device |
| CN105598250A (en) * | 2016-03-18 | 2016-05-25 | 西北工业大学 | Magnetic pulse local loading forming device and method for skin panel |
| CN107301286A (en) * | 2017-06-17 | 2017-10-27 | 中航成飞民用飞机有限责任公司 | The bent jaw clamp relative rotation design method of covering longitudinal stretching shaping |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005013691U1 (en) * | 2005-08-30 | 2007-01-11 | Voss Automotive Gmbh | Connection device for media conduits e.g. tubes or hose lines for gases or other fluids, has deformation zone to space apart catching extensions of spring arms of inner insertion piece from contamination seal seated on free ends of arms |
| US20080004850A1 (en) * | 2006-06-05 | 2008-01-03 | Phida, Inc. | Method of Universal Formability Analysis in Sheet Metal Forming by Utilizing Finite Element Analysis and Circle Grid Analysis |
-
2019
- 2019-04-10 CN CN201910283948.5A patent/CN110110378B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672637A (en) * | 2009-09-24 | 2010-03-17 | 华东理工大学 | Digitizing detection method of complicated curved face |
| CN103514325A (en) * | 2013-09-18 | 2014-01-15 | 华侨大学 | Finite element numerical simulation method of spoke three-spinning-roller dip-separation powerful spinning technology |
| CN103861933A (en) * | 2014-04-01 | 2014-06-18 | 湖南大学 | Corrugated pipe forming device and corrugated pipe machined through corrugated pipe forming device |
| CN105598250A (en) * | 2016-03-18 | 2016-05-25 | 西北工业大学 | Magnetic pulse local loading forming device and method for skin panel |
| CN107301286A (en) * | 2017-06-17 | 2017-10-27 | 中航成飞民用飞机有限责任公司 | The bent jaw clamp relative rotation design method of covering longitudinal stretching shaping |
Non-Patent Citations (8)
| Title |
|---|
| Electromagnetic forming of aluminum circular tubes into square tubes: Experiment and numerical simulation;HaipingYu;《Journal of Manufacturing Processes》;20180131;第31卷;613-623 * |
| Experimental and numerical investigation of laser shock synchronous welding and forming of Copper/Aluminum;xiao wang;《Optics and Lasers in Engineering》;20161130;第86卷;291-302 * |
| QT8812汽车发动机油底壳浅盒拉深成形回弹分析;覃天等;《热加工工艺》;20131108(第21期);153-155 * |
| 旋轮参数对大型变壁厚椭圆封头强力旋压成形的影响;张晋辉等;《塑性工程学报》;20110428(第02期);120-125 * |
| 汽车B立柱热成形性能数值模拟;刘晓晶;《哈尔滨理工大学学报》;20160425;第21卷(第2期);106-111 * |
| 汽车桥壳胀-压成形工艺压制过程的数值模拟;吴士波等;《机械科学与技术》;20151231(第12期);158-162 * |
| 铝合金AA6082(T5)挤压型材基本力学性能试验和成形极限图的建立;刁可山等;《中国机械工程》;20050115(第13期);74-76+81 * |
| 铝合金发动机罩外板的成形质量控制研究;刘挺;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20140315;B022-310 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110110378A (en) | 2019-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111274671B (en) | Precise repair method for complex product assembly process based on digital twin and operation system thereof | |
| CN107116139A (en) | The design method and cladding member mold of die face | |
| CN110814086B (en) | Method for measuring springback value of sheet after stamping | |
| CN103617302A (en) | Method for building accurate molded surface of automobile covering part drawing mold | |
| CN109579733B (en) | Method for rapidly measuring and calculating laser 3D printing forming dimensional precision | |
| CN102672059B (en) | The method of mould concave-convex mold amendment profile is determined according to emulation stamped workpieces thickness | |
| CN109635362B (en) | Method for determining sheet stamping springback compensation factor | |
| CN111177906B (en) | Method for accurately compensating discrete die profile | |
| CN103433380B (en) | Raised forming method of drawing mould of automobile panel | |
| CN103191958B (en) | A kind of optical detecting method of sheet forming resilience | |
| JP2007507013A (en) | Determination of the geometry model at the metal sheet forming stage | |
| CN109635364A (en) | A kind of springback capacity evaluation method based on control errors function | |
| CN108108582A (en) | A kind of method for numerical simulation of curved-surface piece flexible rolling forming process | |
| CN104573272A (en) | Digital quick reversal design technology for injection moulds | |
| CN106570303A (en) | User defined feature-based wallboard part MBD procedure model designing method | |
| CN105354357A (en) | Three-dimensional casting process verification method | |
| CN110110378B (en) | Method for rapidly detecting sticking property of complex curved surface | |
| CN103591912B (en) | The measuring method of the special-shaped feature locations degree of a kind of ring-shaped work pieces | |
| CN104036085A (en) | Thickness statistical method for complex-surface car acoustic part for CAE simulation analysis | |
| CN103808262B (en) | The simulation of multi-hole position holes of products position repairs a die method | |
| CN103324779B (en) | Method for measuring plate incremental forming limit diagram | |
| CN109773058B (en) | Method for forming a pattern on a press mold | |
| CN109108168B (en) | Method for calculating die closing gap of stamping die | |
| CN111368416A (en) | Large-scale steel casting mold filling sensing correction method and system | |
| JP2014078121A (en) | Corresponding-point calculation system and program, and die shape production system and program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |