CN110090887A - A kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation - Google Patents
A kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation Download PDFInfo
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- CN110090887A CN110090887A CN201910283796.9A CN201910283796A CN110090887A CN 110090887 A CN110090887 A CN 110090887A CN 201910283796 A CN201910283796 A CN 201910283796A CN 110090887 A CN110090887 A CN 110090887A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
- B21D26/027—Means for controlling fluid parameters, e.g. pressure or temperature
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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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
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to a kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation, first with the model of three-dimensional software building part, and it is converted into the STL format that finite element analysis software can identify, then suitable sizing grid is selected to carry out grid dividing to part, to guarantee that result is more accurate, and local coordinate system is established at plate boundary node, select suitable circumferential pressure, then circumferential pressure is converted by nodal force formula by nodal force, is applied to the local coordinate established in finite element analysis software and fastens；Then drawing velocity, pressure-pad-force and liquid chamber pressure appropriate are set again drawing and forming is carried out to part, simulation obtains the forming effect of part.Possess forming effect of the big drawing than deep cylindrical part the invention is characterised in that can be improved, and it is suitable for the more demanding industry of wall thickness of some sheet moulding parts, important meaning can be generated such as in auto manufacturing, there is good application prospect in manufacturing.
Description
Technical field
The invention belongs to liquid filling deep-drawing forming technical field, especially a kind of determination method that arc-shaped plate circumferentially pressurizes
Background technique
In recent years, with the arrival in lightweight epoch, plate liquid filling deep-drawing forming becomes the master of sheet part drawing and forming
Want technique.Plate liquid filling deep-drawing forming is that a kind of Yi Shui, oil or other resisting mediums transmit load as power transmission medium, is being drawn
Plate is snug against on punch-pin using the effect of fluid pressure during deep, finally obtains the shape of required workpiece.Plate
Liquid filling deep-drawing forming technology can overcome some shortcomings of traditional deep-drawing technique because of the technical characterstic of its own, can be improved plate
The forming capacity of part.
With the gradually development of plate liquid filling deep-drawing forming technology, requirement of the manufacturing to the performance of product is also constantly mentioned
Height, and more and more thin-walled parts, the plate material parts with biggish drawing ratio are widely used in automobile and aviation boat
The manufacturing fields such as it.Sheet bar maximum difficulty in drawing process be plate flowing can not equal control, zero
Part turning, straight-arm and flange be easy to appear drawing crack, it is thinning, corrugation the defects of, seriously affect the forming quality of part.In order to mention
The forming accuracy and forming limit of high plate reduce the possibility for defect occur in drawing process.Therefore it has been proposed that
Apply pressure around plate material parts to prevent the excessive deformation of part, can achieve good effect in this way.
To plate apply circumferential pressure when need in view of force size and Orientation, generally, be arranged power size and
Direction is that the vector superposed size for finding out resultant force is carried out according to coordinate system, and setting steps are to establish a plane coordinates in boundary
System is divided into X-axis and Y-axis, while applying power appropriate along X-axis and Y-axis, finds out the size of total power added, on the contrary, it is known that resultant force
Size and Orientation, so that it may find out the specific power size and Orientation that apply in X-axis and Y-axis, but such method pair
Relatively regular in square plate and boundary and without circular arc plate is more convenient, but for some plates with circular arc, setting is flat
Areal coordinate system is just comparatively more complicated, because the direction of each node of circular arc is and the applied force in variation
Direction, set up it is comparatively laborious, be based on this problem, this paper presents a kind of successfully managing with circular arc based on numerical simulation
The applying method of shape plate circumferential pressure.
Summary of the invention
The object of the present invention is to provide a kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation is solving to have
Have big drawing than the Problems in forming of part on the basis of, propose be of universal significance based on liquid filling deep-drawing forming circumferential direction pressurization
Method, plate is formed using this method, and according to the size of the circumferential pressure of setting to plate carry out simulation forming,
The forming accuracy and forming limit of plate material parts can be improved, and reduce plate material parts and lacked during liquid filling deep-drawing forming
Sunken possibility.The problem of based on proposing in background technique, applies circumferential pressure to arc-shaped plate herein and provides one kind effectively
Solution, to plate carry out grid dividing, at each boundary node be arranged a local coordinate system, local coordinate system
X-axis be to be directed toward plate center along plate boundary, Y-axis is tangent to plate node, and Z axis is perpendicular to plate plane.It is applying in this way
When adding circumferential pressure, only apply nodal force in the X-axis direction, the data being arranged in this way are more accurate, are arranged more convenient.To
The formability for improving blank is more easier plate material parts forming, efficiently.
To achieve the above object, the present invention solves the problem in background technique using following technical scheme；
A kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation, it the following steps are included:
Step 1, the model that part is constructed using three-dimensional software, are converted into STL format；
Step 2 selects suitable sizing grid to carry out grid dividing to model inside finite element analysis software, on plate boundary
Local coordinate system is established at node；
Circumferential pressure appropriate is arranged in step 3 around plate, and then circumferential pressure is converted using the calculation formula of nodal force
For nodal force, finally calculated nodal force is applied to local coordinate one by one and fastened；
Step 4, the suitable drawing velocity of setting, pressure-pad-force and liquid chamber pressure, carry out simulation drawing and forming to part；
It is step 5, final, the forming effect figure of part is obtained on FEM post-processing analysis software.
The invention has the following advantages:
1. by the quantity that a certain number of local coordinate systems are arranged in plate boundary, for having the plate of circular arc shape dress,
The application position of nodal force can preferably be found；
2. applying circumferential pressure by fastening in local coordinate from boundary to plate center, liquid filling deep-drawing forming, energy can be assisted
Increase the wall thickness of part, reduces the possibility of plate drawing crack in forming process；
3. the method for applying circumferential pressure in the past is limited by number of grid, number of grid cannot be excessive, the side that the present invention uses
Net of justice lattice division numbers are unrestricted, and more boundary nodes can be set, and more accurate, the essence of simulation is shaped in numerical simulation
Du Genggao.
4. the forming property of thin-walled parts can be improved in the present invention, manufacturing is preferably served.
Detailed description of the invention
Fig. 1 part size and model
Fig. 2 local coordinate system
The forming effect figure of Fig. 3 plate one
The forming effect figure of Fig. 4 plate two
Fig. 5 forming limit chromatogram
Specific embodiment
This example is a kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation, specific steps are as follows:
1. the blank of example selection is two round aluminum alloy plate materials that diameter is 100mm with a thickness of 1mm, mark is respectively
Plate one and plate two.The threedimensional model of part is drawn, and is converted into stl file and imported into finite element analysis software, part
Model is as shown in Figure 1；
2. plate one does not need to create local coordinate system in boundary after carrying out grid dividing, plate two is carrying out grid dividing
Afterwards, 64 nodes are obtained in the boundary of part, and needs to establish a local coordinate system, plate at each node
The creation result of the local coordinate system of material two is as shown in Figure 2；
3. pair two pieces of plate material carries out sunykatuib analysis, plate one does not add circumferential pressure, and the circumferential pressure that plate two applies is
Then the nodal force being calculated by nodal force formula is applied separately to 64 local coordinates and fastened by 20MPa, and require
The direction of applied force all must be to be directed toward plate center by plate boundary node.
4. the punching press parameter of example setting is respectively: drawing velocity 2000mm/s, pressure-pad-force 50000N, liquid chamber pressure are
Then 30MPa carries out simulation drawing and forming in finite element analysis software；
5. final, forming effect Fig. 3 and as shown in Figure 4 of part is obtained on FEM post-processing analysis software, it is evident that
It can be seen that the possibility of rupture can be occurred in the seamed edge corner of part by not applying the plate one of circumferential pressure, apply week
To pressure plate two the seamed edge corner of part fracture tendency disappear.
Claims (4)
1. a kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation, comprising the following steps:
Step 1: using the model of three-dimensional software building part, it is converted into STL format；
Step 2: suitable sizing grid is selected to carry out grid dividing to model inside finite element analysis software, on plate side
Local coordinate system is established at boundary's node；
Step 3: being arranged circumferential pressure appropriate around plate, and then circumferential pressure is turned using the calculation formula of nodal force
Nodal force is turned to, finally calculated nodal force local coordinate is applied to one by one and fastened；
Step 4: being arranged suitable drawing velocity, pressure-pad-force and liquid chamber pressure, carries out simulation drawing and forming to part；
Step 5: the forming effect figure of part is obtained on FEM post-processing analysis software.
2. a kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation according to claim 1, substantially special
The setting local coordinate system being in the step 2 is levied, applicable is the plate blank with arc-shaped.
3. a kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation according to claim 1, substantially special
The local coordinate system of establishing being in the step 2 is levied, the foundation of local coordinate system is based in plate boundary node and plate
The line of the heart determines the position and direction of local coordinate system, and the quantity for the local coordinate system established should be with plate boundary
The quantity of node is consistent.
4. a kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation according to claim 1, substantially special
Sign is in the step 3 that the nodal force of calculating is applied to local coordinate one by one to be fastened, and is to ensure that and applies circumferential pressure
Direction should be directed toward plate center along plate boundary node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283796.9A CN110090887A (en) | 2019-04-09 | 2019-04-09 | A kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation |
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| CN201910283796.9A CN110090887A (en) | 2019-04-09 | 2019-04-09 | A kind of liquid filling deep-drawing forming circumferential direction pressure method based on numerical simulation |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903474A (en) * | 2006-07-28 | 2007-01-31 | 哈尔滨工业大学 | Procesing equipment capable of improving plate part formation limitation and method therefor |
| CN101318205A (en) * | 2008-06-24 | 2008-12-10 | 南京航空航天大学 | Circumferential nature supercharging plate liquid filling deep-drawing forming method and apparatus |
| CN102248056A (en) * | 2011-06-13 | 2011-11-23 | 北京航空航天大学 | Method for improving sheet forming limit |
| JP2015108880A (en) * | 2013-12-03 | 2015-06-11 | 本田技研工業株式会社 | Draw model reflection method for press molding simulation result |
| WO2016162642A1 (en) * | 2015-04-09 | 2016-10-13 | Aurock | Method of controlling a superplastic forming machine and corresponding machine |
| CN107958124A (en) * | 2017-12-06 | 2018-04-24 | 哈尔滨工业大学深圳研究生院 | A kind of mixed-scale coupling process based on distribution mode of contact stresses optimization |
-
2019
- 2019-04-09 CN CN201910283796.9A patent/CN110090887A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903474A (en) * | 2006-07-28 | 2007-01-31 | 哈尔滨工业大学 | Procesing equipment capable of improving plate part formation limitation and method therefor |
| CN101318205A (en) * | 2008-06-24 | 2008-12-10 | 南京航空航天大学 | Circumferential nature supercharging plate liquid filling deep-drawing forming method and apparatus |
| CN102248056A (en) * | 2011-06-13 | 2011-11-23 | 北京航空航天大学 | Method for improving sheet forming limit |
| JP2015108880A (en) * | 2013-12-03 | 2015-06-11 | 本田技研工業株式会社 | Draw model reflection method for press molding simulation result |
| WO2016162642A1 (en) * | 2015-04-09 | 2016-10-13 | Aurock | Method of controlling a superplastic forming machine and corresponding machine |
| CN107958124A (en) * | 2017-12-06 | 2018-04-24 | 哈尔滨工业大学深圳研究生院 | A kind of mixed-scale coupling process based on distribution mode of contact stresses optimization |
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| 刘晓晶等: "铝镁合金双路径加载充液拉深成形的数值模拟", 《中国有色金属学报》 * |
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Application publication date: 20190806 |