CN1289278C - Method for determining blanks for plate forming members - Google Patents
Method for determining blanks for plate forming members Download PDFInfo
- Publication number
- CN1289278C CN1289278C CN 200310118973 CN200310118973A CN1289278C CN 1289278 C CN1289278 C CN 1289278C CN 200310118973 CN200310118973 CN 200310118973 CN 200310118973 A CN200310118973 A CN 200310118973A CN 1289278 C CN1289278 C CN 1289278C
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- Prior art keywords
- blank
- shape
- blanks
- molecular polymer
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 229920000642 polymer Polymers 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000009966 trimming Methods 0.000 claims abstract 3
- 230000008014 freezing Effects 0.000 claims 2
- 238000007710 freezing Methods 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000001788 irregular Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 24
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004836 empirical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920005479 Lucite® Polymers 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007652 sheet-forming process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention discloses a method for determining blanks for plate forming members, which is characterized in that the shape of blanks is firstly and roughly predicted according to the surface area of actual parts so that a closed curve is obtained, high molecular polymer blanks are made in the shape and then are put in moulds to be formed by heating, the moulds and formed pieces are cooled to room temperature, the formed pieces are then taken out to be trimmed, the trimmed formed pieces are annealed and unfolded at high temperature to be recovered into plate members, and the edge shape of the plate members can be used as the baiting of blank templates of metal forming pieces. Because the method can be used for improving the concave-convex irregular situations of the edges of the formed pieces through reasonably determining the blanks so as to reduce the trimming quantity of the formed pieces and reduce material water and product cost; the reasonable blank can be favorable to the flow of metal in the formation of plate metal and improve product quality.
Description
Technical field
The present invention relates to a kind of method of definite sheet forming spare blank, the method for employed especially aborning definite slab drip molding blank edge shape.
Background technology
At present, it is multiple to use the method for determining slab drip molding blank edge shape to have in the known production, comprises empirical method, geometric maps method, slip line method, incremental finite element method, finite element algorithm for inversion.These methods all are to propose on the basis of certain hypothesis at a certain Lei Sheet gold part, and advantage and the deficiency of oneself respectively arranged.Wherein empirical method is simple, but only is applicable to the definite of rectangle blank and circular blanks, and the degree of accuracy is not high; Slip line method is the directly perceived and reasonable method of a kind of comparison.But because the mathematical operation more complicated, difficulty is applied, and fails at present to use in production practices.Because it has adopted some hypothesis in deriving, application is restricted simultaneously; Because the limitation of geometric maps method itself, it only is applicable to limited scope, and error is bigger; First three methods is not considered the influence of mold shape and lubricating condition, incremental finite element method has been considered the influence of various factors comprehensively, and precision is higher, and its shortcoming is a Contact Boundary condition difficult treatment, computation model is very complicated, and the convergence of calculating is subjected to very big influence.Need to revise repeatedly blank shape simultaneously and calculate, the design cycle is oversize; A main feature of finite element algorithm for inversion is, sheet forming process is reduced to one or several simple deformation processes that loads, and adopts total strain theory to analyze.Therefore calculate and only to consider initial state and deformation states, ignore the variation of intermediate configuration.It is a kind of highly effective algorithm of predicting large deformation in the sheet forming.The method is because the simple hypothesis that loads, and computational accuracy is under some influence, and algorithm imperfection also, is in the development.
Summary of the invention
For mathematical operation complexity in the method that overcomes employed definite slab drip molding blank edge shape in the existing production, deficiency such as the degree of accuracy is not high, the design cycle is long, the invention provides the method that blank shape is determined in a kind of physical analogy---the reverse method of physics.Adopt the inventive method to determine the blank edge shape, can improve the concavo-convex uneven situation of the back part edge that is shaped, reduce part deburring amount, reduce product cost.
The technical solution adopted for the present invention to solve the technical problems is:
1) estimates earlier the shape of blank roughly, obtain the curve of a closure, and make the high molecular polymer blank according to this shape according to the surface area of actual part;
2) preheated mold, then the high molecular polymer blank is put into mould and continued heating, when being heated to 85 ℃, be incubated 20 minutes, continue heating again, after making mould and blank all reach 120～150 ℃ of the solidification points of high molecular polymer, be incubated 80 minutes, slowly be shaped, the end back that is shaped guarantees that the position of mould is motionless, with mould and drip molding cool to room temperature, take out drip molding;
3) drip molding being carried out deburring handles;
4) drip molding after the deburring is evenly heated, when being heated to 85 ℃, be incubated 3 minutes, continue heating again, after making blank all reach 120～150 ℃ of the solidification points of high molecular polymer, be incubated 20 minutes, high annealing launches to make drip molding revert to plate, and its edge shape can be used as the blank template blanking of metal forming spare.
The present invention's advantage compared to existing technology is, because this method can be improved the concavo-convex uneven situation in drip molding edge by rationally definite blank, thereby reduces the deburring amount of drip molding, reduces the waste of material, reduces the cost of product; Metal was mobile during reasonably but blank You Li Yu Sheet gold was shaped, and improved the quality of product.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 estimates blank shape figure according to what actual part was made
Fig. 2 is according to the high molecular polymer drip molding figure that estimates after blank shape is shaped
Fig. 3 is the high molecular polymer drip molding figure of Fig. 2 after deburring
Fig. 4 is the plate blank shape figure after high molecular polymer drip molding high temperature recovers
Fig. 5 is the temperature control curve in the high molecular polymer forming process
Temperature control curve when Fig. 6 is the recovery of high molecular polymer drip molding high temperature
The specific embodiment
With reference to Fig. 1～6.Estimate the shape of blank roughly according to the part of reality, make the high molecular polymer blank according to this shape.The blank predictor method is: part is kept flat its orthographic drawing that draws, according to the estimation of the surface area of part, perspective view is amplified and fairing processing, obtain the curve of a closure, make the high molecular polymer blank by the shape of estimating blank.The blank shape of estimating is seen Fig. 1.
Mould is preheated, then the high molecular polymer blank is put into mould, the attention putting position should rationally and be made corresponding mark, continue heating, when being heated to 85 ℃, be incubated 20 minutes, continue heating again, after making mould and blank all reach 120～150 ℃ of the solidification points of high molecular polymer, be incubated 80 minutes, slowly be shaped, the end back that is shaped guarantees that the position of mould is motionless, with mould and drip molding cool to room temperature, take out drip molding.The high molecular polymer drip molding is seen Fig. 2.
Workpiece according to reality carries out the deburring processing to drip molding.Drip molding after the deburring is seen Fig. 3, the shape of it and metal forming spare, measure-alike.
Drip molding after the deburring is evenly heated, when being heated to 85 ℃, is incubated 3 minutes, continue heating again, make blank reach 120～150 ℃ of the solidification points of high molecular polymer after, be incubated 20 minutes, the high annealing expansion makes drip molding revert to plate, sees Fig. 4.Its edge shape promptly can be used as the blank shape of drip molding.Be used for the blanking of metal blank or the blanking of high molecular polymer blank.Generally for the stamping parts of appearance similar, need only obtain the equipotential line of a certain size drip molding blank template, the equipotential line of other size drip molding blank template all can obtain by amplifying or dwindling.
Wherein high molecular polymer is chosen 0.5 thick poly (methyl methacrylate) plate, and the temperature control that lucite is shaped and shape is recovered is as Fig. 5, shown in Figure 6.
According to 0.5 definite thick aluminium alloy plate blank shape of method of the present invention, and carried out blanking, shaping, respond well.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310118973 CN1289278C (en) | 2003-12-09 | 2003-12-09 | Method for determining blanks for plate forming members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310118973 CN1289278C (en) | 2003-12-09 | 2003-12-09 | Method for determining blanks for plate forming members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1546299A CN1546299A (en) | 2004-11-17 |
| CN1289278C true CN1289278C (en) | 2006-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310118973 Expired - Fee Related CN1289278C (en) | 2003-12-09 | 2003-12-09 | Method for determining blanks for plate forming members |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1289278C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9844904B2 (en) * | 2014-02-18 | 2017-12-19 | The Boeing Company | Formation of thermoplastic parts |
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2003
- 2003-12-09 CN CN 200310118973 patent/CN1289278C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1546299A (en) | 2004-11-17 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061213 Termination date: 20100111 |