CN110110378A - A kind of complex-curved mold rapid detection method - Google Patents
A kind of complex-curved mold rapid detection method Download PDFInfo
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- CN110110378A CN110110378A CN201910283948.5A CN201910283948A CN110110378A CN 110110378 A CN110110378 A CN 110110378A CN 201910283948 A CN201910283948 A CN 201910283948A CN 110110378 A CN110110378 A CN 110110378A
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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
- G06F30/15—Vehicle, aircraft or watercraft 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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Abstract
The invention discloses a kind of complex-curved mold rapid detection methods, draw mold former in three-dimensional drawing software first, secondly import in finite element analysis software physical model and carry out punch forming simulation to part, obtain FLD image；The destination file solved is post-processed again, by part after molding in the counterclockwise direction every 45 ° of progress cuttings, obtains 4 important cutting planes.Finally there is according to the point on cutting line and the point on punch-pin the relationship of mapping one by one, quantified according to the distance of the point-to-point transmission of mutual mapping, the mold data of plate are obtained by Finite Element Simulation Software to simulate paste state under truth.Describe component shaping effect, more fast and accurately to improve workpiece level and quality.
Description
Technical field
The present invention relates to sheet stamping precision field, more particularly to a kind of quick side of detection of complex-curved mold
Method.
Background technique
As the manufacturing industry of the raising automobile of national life level is also accounted in the industry of entire country since new century
According to high specific gravity.Most coverings in automobile are all that sheet-metal press working forms.Therefore to the precision and matter of stamping parts
Amount has higher requirement.
Due to traditional mold be related to being dependent on empirical equation greatly it is fault-tolerant lower on novel type face.With area of computer aided
The development of designing technique is flourished based on the numerical simulation of CAE technology, is largely applied in the design die trial of mold, reliably
Property has been increased to 95%.
When with complex-curved part stretching, the ability that blank obtains mold shape is referred to as mold.Traditional
Mold inspection relies on experienced mold engineer and time-consuming and laborious, and often error is larger for obtained data.Based on finite element
Numerical simulation technology can quickly observe mold situation by post-processing module, accurately specifically measure mold.To mention
High technology precision provides new idea and method.
Summary of the invention
Present invention aim to address ask with complex-curved part is long and not accurate enough in detection mold timeliness
Topic, and propose a kind of complex-curved mold rapid detection method.
The technical solution adopted by the present invention to solve the technical problems is: a kind of quick side of detection of complex-curved mold
Method is realized by following steps:
Step 1: the geometric dimension of design mold establishes three-dimensional entity model as needed, and model is imported in finite element software
It carries out molding simulation and obtains FLD image；
Step 2: carrying out reprocessing analysis for the file after simulation, then is difficult to the complex-curved place shaped and carries out cutting counterclockwise,
Every 45 ° of cuttings, it is total to cutting 4 times and obtains cutting line；
Step 3: the equidistant multiple points of label on hatching plate, and record its distance；
Step 4: the equidistant multiple points of label on hatching punch-pin, and record its distance；
Step 5: in conjunction with finite element discretization thought, target point on hatching is mapped in punch-pin, ideal point is obtained, uses target
For point to the distance between ideal point characterization mold, mold illustrates that mold is better closer to 100%, on the contrary then poorer.
The complex-curved mold rapid detection method of one kind according to claim 1, which is characterized in that step 1
The three-dimensional entity model is .iges format.
The complex-curved mold rapid detection method of one kind according to claim 1, which is characterized in that step 2
Described in cutting position be the higher part for being difficult to realize mold of complex-curved protrusions.
The complex-curved mold rapid detection method of one kind according to claim 1, which is characterized in that step 2
Middle cutting angle be 0 ° counterclockwise, 45 °, 90 °, 135 °,.
The complex-curved mold rapid detection method of one kind according to claim 1, which is characterized in that step 5
In quantified by relational expression, specific relational expression are as follows:
Wherein, η indicates mold, and the actual range between target point and ideal point is defined as Ai, the node on punch-pin arrives
The projector distance of plate initial position is defined as Bi, n is node number.
The beneficial effects of the present invention are: a kind of complex-curved mold rapid detection method of the present invention, use are limited
The post-processing module of meta software rapidly and accurately obtains a plurality of hatching of part arbitrary section, further according to the section on hatching
The distance of point to corresponding node on punch-pin obtains the specific value of mold in conjunction with the relationship between mold and each node.It should
Method greatly enhances the accuracy of mold assessment, and proposes another reference way for the optimization of technological parameter
Diameter.
Detailed description of the invention
Fig. 1 is iges format fender model
Fig. 2 is 0 ° of cutting
Fig. 3 is 45 ° of cuttings
Fig. 4 is 90 ° of cuttings
Fig. 5 is 130 ° of cuttings
Specific embodiment
Present embodiment is based on complex-curved mold rapid detection method.The case model used is automobile wing
Plate, specific detecting step are realized by following steps:
Step 1: the geometric dimension of design mold establishes three-dimensional entity model as needed, and model is imported in finite element software
It carries out molding simulation and obtains FLD image；
Step 2: carrying out reprocessing analysis for the file after simulation, then is difficult to the complex-curved place shaped and carries out cutting counterclockwise,
Every 45 ° of cuttings, it is total to cutting 4 times and obtains cutting line；
Step 3: the equidistant multiple points of label on hatching plate, and record its distance；
Step 4: the equidistant multiple points of label on hatching punch-pin, and record its distance；
Step 5: in conjunction with finite element discretization thought, target point on hatching is mapped in punch-pin, ideal point is obtained, uses target
For point to the distance between ideal point characterization mold, mold illustrates that mold is better closer to 100%, on the contrary then poorer.
Relational expression between mold and each node of mapping are as follows:
Wherein, η indicates mold, and the actual range between target point and ideal point is defined as Ai, node on punch-pin to plate
The projector distance of initial position is defined as Bi, n is node number.
That fender punch-pin and plate are detected when the method is used to not spring back after punching press by this is bonded situation.By iges lattice
The fender model file as shown in Figure 1 of formula, which is imported into numerical simulation software, selects automatic setting, submits after setting completed
It is solved into LS- dyna solver.It opens it in post-processing module after solution, observes its FLD image, select
More difficult molding part is taken to carry out cutting.Cutting is to carry out counterclockwise, and cutting angle is 0 °, 45 °, 90 °, 135 ° respectively.Respectively
Obtain Fig. 2, Fig. 3, Fig. 4, cutting line shown in fig. 5.
Mapping is point on plate on equidistant selected point z-axis direction on punch-pin in insufficient to mold place.It is convex
The distance between two o'clock is defined as A on mouldi, the distance definition of the point of mapping is B up and down between plate and punch-pini, obtained by measurement
AiAnd BiData it is as shown in table 1；Data in table 1 are substituted into formula, obtain the relational expression between mold and each point are as follows:
Wherein, η indicates mold, and the actual range between target point and ideal point is defined as Ai, node on punch-pin to plate
The projector distance of initial position is defined as Bi, n is node number, and substitution formula is calculated fender left upper mold and is
78%, show that mold effect is undesirable.
Claims (5)
1. a kind of complex-curved mold rapid detection method, which comprises the following steps:
Step 1: the geometric dimension of design mold establishes three-dimensional entity model as needed, and model is imported in finite element software
It carries out molding simulation and obtains FLD image；
Step 2: carrying out reprocessing analysis for the file after simulation, then is difficult to the complex-curved place shaped and carries out cutting counterclockwise,
Every 45 ° of cuttings, it is total to cutting 4 times and obtains cutting line；
Step 3: the equidistant multiple points of label on hatching plate, and record its distance；
Step 4: the equidistant multiple points of label on hatching punch-pin, and record its distance；
Step 5: in conjunction with finite element discretization thought, target point on hatching is mapped in punch-pin, ideal point is obtained, uses target
For point to the distance between ideal point characterization mold, mold illustrates that mold is better closer to 100%, on the contrary then poorer.
2. the complex-curved mold rapid detection method of one kind according to claim 1, which is characterized in that step 1 institute
Stating three-dimensional entity model is .iges format.
3. the complex-curved mold rapid detection method of one kind according to claim 1, which is characterized in that in step 2
The position of the cutting is the higher part for being difficult to realize mold of complex-curved protrusions.
4. the complex-curved mold rapid detection method of one kind according to claim 1, which is characterized in that in step 2
Cutting angle is 45 ° counterclockwise, 90 °, 135 °, 170 °.
5. the complex-curved mold rapid detection method of one kind according to claim 1, which is characterized in that in step 5
Quantified by relational expression, specific relational expression are as follows:
Wherein, η indicates mold, and the actual range between target point and ideal point is defined as Ai, the node on punch-pin rises to plate
The projector distance of beginning position is defined as Bi, n is node number.
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| CN201910283948.5A CN110110378B (en) | 2019-04-10 | 2019-04-10 | Method for rapidly detecting sticking property of complex curved surface |
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| CN201910283948.5A CN110110378B (en) | 2019-04-10 | 2019-04-10 | Method for rapidly detecting sticking property of complex curved surface |
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| CN110110378B CN110110378B (en) | 2022-12-20 |
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| 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 |
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