CN103692650B - A kind of control method of product shell deformation - Google Patents
A kind of control method of product shell deformation Download PDFInfo
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- CN103692650B CN103692650B CN201310753914.0A CN201310753914A CN103692650B CN 103692650 B CN103692650 B CN 103692650B CN 201310753914 A CN201310753914 A CN 201310753914A CN 103692650 B CN103692650 B CN 103692650B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 230000013011 mating Effects 0.000 claims abstract description 3
- 239000003292 glue Substances 0.000 claims description 59
- 229920001875 Ebonite Polymers 0.000 claims description 13
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000005489 elastic deformation Effects 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 abstract description 11
- 239000000806 elastomer Substances 0.000 abstract description 10
- 239000000463 material Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides the control method of a kind of product shell deformation, including, according to product structure and briquetting pressure selection reference product；Reference product and cooperation product design creeping characteristic, according to the design size of reference product, carries out mating feature design the most spacing to carry out.Use technical scheme, it is substantially reduced elastomer product because deforming the molding difficulty caused, also make assembling product process be easier to control, it is possible to solve in assembling process because the problem on deformation that causes not of elastomer hardness, finally realize the attractive in appearance of product and size Control accurately.
Description
Technical field
The present invention relates to product shell design field, the control method of a kind of product shell deformation.
Background technology
At present major part product the most all uses simple hard material, such as resin and plastic and metal, but along with consumer
To product comfort, the higher pursuit of protective, increasing product needed is coated with flexible glue material on hard material.As
The elastic polymer material such as rubber and silica gel.As it is shown in figure 1, be that flexible glue is coated with hard material schematic diagram.
When producing the product of covered by soft gum, need through repeatedly molding, so accuracy to size is more difficult to control.If it is many
The product of individual covered by soft gum assembles, then can cause flexible material stress deformation, cause machine product in appearance and performance
On major defect.
At present the product of covered by soft gum typically all does bar gap attractive in appearance between two flexible glues, it is to avoid outer layer flexible glue direct
Contact, or add sheath, protect and correct the deformation of product.
In the assembling of product shell, owing to product shell is inadequate in the degree of accuracy of forming process, assembly assembles and dress
Join the bad of process, specifically,
As in figure 2 it is shown, be that two housing adapter section differentials are intended to, the flexible glue part of two housings occurs that size difference is relatively
Greatly, the section of causing is poor；Size difference between this type housing, is primarily due to the manufacturing variation of housing itself, additionally assembles
During because fixing point is different with flexible glue (elastomer) stress that on-fixed point causes, thus the difference in size between larger production
Different.
As it is shown on figure 3, be the gap schematic diagram that be there will be by assembling between two housings.Cause assembling river between housing
Western main cause is in forming process, and the buckling deformation of product causes flatness not reach requirement, fixing additionally by assembling, makes
Become Inner extrusion deformation, thus this defect of product cannot be corrected.Summary of the invention
For solving the problems referred to above, embodiments provide the control method of a kind of product shell deformation, to solve to deposit
Product size there are differences the problem that cannot install.
For solving the problems referred to above, the invention provides the control method of a kind of product shell deformation, including,
According to product structure and briquetting pressure selection reference product；
Reference product and cooperation product design creeping characteristic, according to the design size of reference product, carries out coordinating spy
Levy design the most spacing to carry out.
Above-mentioned method, wherein, includes according to product structure and briquetting pressure selection reference product,
The product that selection reference size is less；Or,
Select the product that the residual stress after molding is less；Or
The product that reference dimension and residual stress are less designs what flexible glue flushed less than ebonite or flexible glue and ebonite
Soft or hard glue combination.
Above-mentioned method, wherein, designs creeping characteristic on reference product and cooperation product and includes,
Described creeping characteristic is the limit features of tongue and groove, designs groove, limit and coordinate the convex of product on reference product
Edge.
Above-mentioned method, wherein, E*k*k2> T1*T2, wherein E is elastic modelling quantity, and K is that direct ratio substitutes into coefficient, and K2 is inverse ratio
Substituting into coefficient, product elastic deformation thickness on the basis of T1, T2 is for coordinating product flexible glue thickness.
Above-mentioned method, wherein, flange and recess width T3 >=0.6*T2, described T2 is the flexible glue thickness coordinating product,
Described T3 is flange and recess width.
Above-mentioned method, wherein, reference product elastic deformation thickness T1 and cooperation product flexible glue thickness T2 chooses as far as possible
Little, when choosing flexible glue material, choose the material that elastic modelling quantity is big simultaneously as far as possible.
Above-mentioned method, wherein, described cooperation production uses the forming temperature molding more than ebonite side of flexible glue side
Temperature, controls the deformation direction of product.
Above-mentioned method, wherein, reference product and coordinate product to combine being defined as of bed knife on vertical at flexible glueF1 and F2 is two local bed knifes, and E is the deformation coefficient of material, and F3 produces for correcting
The power required for deformation of products between two local force, △ Y is the shell deformation between the bed knife of local, described limit features
Gap be △ G=0.1*Kmm, and contact area is more than 1～2 times of bed knife pressure face.
Use technical scheme, being substantially reduced elastomer product because deforming the molding difficulty caused, also making product
Product assembling process is easier to control, it is possible to solve the problem on deformation caused in assembling process because elastomer hardness is inadequate,
Realize the attractive in appearance of product and size Control accurately eventually.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is that soft or hard glue is coated with schematic diagram；
Fig. 2 is that two housing adapter section differentials are intended to；
Fig. 3 is the gap schematic diagram that be there will be by assembling between a housing；
Fig. 4 is three kinds of combination schematic diagrams of soft or hard glue；
Fig. 5 is the formed product deformation molding control method to big size distortion；
Fig. 6 is the stress schematic diagram that housing coordinates；
Fig. 7 is that external force corrects flexible glue deformation explanatory diagram；
Fig. 8 is elastic modelling quantity and elastomer stress linear relationship chart；
Fig. 9 is flexible glue creeping characteristic specification；
Figure 10 is mechanics and the sizing specification figure of creeping characteristic；
Figure 11 is the design feature explanation of product；
Figure 12 is the inventive method embodiment flow chart.
Detailed description of the invention
In order to make the technical problem to be solved, technical scheme and beneficial effect clearer, clear, below tie
Close drawings and Examples, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
In order to explain the present invention, it is not intended to limit the present invention.
By above-mentioned bad phenomenon and analysis it can be appreciated that by following two aspect defect can solve:
1, the deformation caused in the shaping manufacture process of part own and warpage are corrected；
2, the crimp that the Stress non-homogeneity during assembling causes is solved.
As shown in figure 12, it is the flow chart of the embodiment of the present invention, it is provided that the control method of a kind of product shell deformation, bag
Include,
Step S101, according to product structure and briquetting pressure selection reference product；
As an example, determine the residual stress after each formed product, by the structure of single product with become
After type stress analysis, selection reference product.
System of selection and the principle of reference product are as follows: the product that (1) selection reference size is less；(2) after selecting molding
The less product of residual stress；(3) on the product that reference dimension and residual stress are less, design flexible glue is less than ebonite as far as possible
Or the soft or hard glue combination that flexible glue and ebonite flush.
The flexible glue of soft or hard glue bonded products and the design of ebonite have three kinds, are divided into flexible glue to be less than ebonite, and flexible glue is with hard
Glue flushes, and flexible glue is higher than ebonite, as shown in Figure 4.
Step S102, designs creeping characteristic on reference product and cooperation product, according to the design size of reference product, enters
The design of row mating feature is the most spacing to carry out.
Owing to, in actual production process, the stress of product and deformation are inevitable, need to control completely the stress of product
The size variation caused with deformation, needs to expend the highest cost, and can cause a large amount of wastes of material.Actually without
Method controls the deformation scope at needs of product, but can control the deformation direction of product, concrete control direction and control
Method processed is: the actual size of (1) reference product is L+ △ L1;(2) the size deformation coordinating product is L+ △ L2, makes L+ △ L2
> L+ △ L1, i.e. seek to △ L2 > △ L1, namely need the deformation quantity controlling non-referenced product to need more than reference product
Deformation quantity；(3) basic skills allowing cooperation product deformation big is in process of production, makes the forming temperature of flexible glue side more than ebonite
The forming temperature of side, as shown in Figure 5.
When the assembling of product, necessarily need to make single product be fixed single product by certain power.Real in the present invention
Executing in example, the power of needs is the power of single product flexible glue part faying face vertical direction.That is consolidating regardless of any mode
Fixed, finally it is required for ensureing to have enough component in the composition surface vertical direction of flexible glue part.Additionally because product is generally
Local pressure, so needing to do limit features at the position of stress, prevents the excessive extrusion deformation causing flexible glue of local pressure, limit
The design of position feature can use the contact of ebonite, and when flexible glue is fully mated, the gap of limit features is △ G=0.1*Kmm, K
For interference coefficient, and contact surface is more than the pressure face 1 of bed knife～2 times.Two local bed knife F1 and F2 and local bed knife
Between shell deformation △ Y relation as follows:
Wherein E is the deformation coefficient of material, and F3 is to correct the power required for the deformation of products produced between two local force, as
Shown in Fig. 6.
As it is shown in fig. 7, two soft or hard glue coordinate product, the flexible glue size of benchmark housing can be less than the flexible glue chi coordinating housing
Very little, i.e. L1 < L2.In order to make L1=L2, it is necessary to correct deformation position by external force F, the sizes values of F determines that the later stage corrects the big of power
Little, it is desirable to the value of F is the smaller the better, in order to reduce external force F, the design of soft or hard glue binding site is stayed certain interval △ G2, need
Make △ G2 > △ L2-△ L1.
From the point of view of the mechanical model of elastomer, the Creep Deformation of elastomer and stress present linear relationship substantially, additionally
Elastic modelling quantity and elastomer hardness are also the linear relationships that is directly proportional, as shown in Figure 8,
σ=E ε
E is elastic modelling quantity, and ε is Creep Deformation amount, and σ is the stress that creep produces
Additionally elastomeric material (such as synthesis TPU) originally can keep stable compression in wider high and low temperature scope
Stress ratio, by test and sunykatuib analysis, σ/F > 100, it is possible to utilize the creep stress of elastomer self to control
There are enough reliabilities at deformation position, so that L1=L2.
Accordingly, as an embodiment, designing creeping characteristic on flexible glue, creeping characteristic is the most spacing feature, this
Feature in embodiment is the limit features of convex-concave groove, designs groove, limit the flange coordinated on product on reference product, as
Shown in Fig. 9.
As shown in Figure 10, to the mechanical model description of product and being calculated as of each size after having added creep limit features:
In order to correct cooperation product, it is necessary to assure:
F12≥F21
Wherein: F=F21
F12=σ=E* ε > F(formula one)
Wherein: F is the external force corrected and coordinate product needed, and F21 is the power coordinating product to apply to reference product, and F12 is
Reference product gives the counteracting force coordinating product, and E is elastic modelling quantity, and ε is Creep Deformation amount, and σ is the stress that creep produces
Size is defined below:
Apply the size of external force F to coordinating product and coordinate the flexible glue thickness T2 direct ratio of product:
F=k*T2
K is that direct ratio substitutes into coefficient；
Creep Deformation amount ε and reference product extruded flexible glue thickness T1 are inversely proportional to:
ε=k2/T1
K2 is that inverse ratio substitutes into coefficient；
Substitution formula one:
E*ε=E*k2/T1>F=k*T2
Namely E*k*k2>T1*T2
Its flange and recess width T3 >=0.6*T2
From above-mentioned inequality, in order to ensure that inequality is set up and has superiority, ensure in the design formed product and
On the premise of intensity, reference product elastic deformation thickness T1 and cooperation product flexible glue thickness T2 should be the least, selects simultaneously
When taking flexible glue material, choose the material that elastic modelling quantity is big as far as possible.
In sum, last product design basic feature performance is with reference to Figure 11, to reference product, soft or hard glue cooperation side
Formula, bed knife limit features, soft or hard glue fit system, creeping characteristic has done basic description.
Described above illustrate and describes a preferred embodiment of the present invention, but as previously mentioned, it should be understood that the present invention
Be not limited to form disclosed herein, be not to be taken as the eliminating to other embodiments, and can be used for other combinations various,
Amendment and environment, and can be in invention contemplated scope described herein, by above-mentioned teaching or the technology of association area or knowledge
It is modified.And the change that those skilled in the art are carried out and change are without departing from the spirit and scope of the present invention, the most all should be at this
In the protection domain of bright claims.
Claims (4)
1. the control method of a product shell deformation, it is characterised in that include,
According to product structure and briquetting pressure selection reference product；
Reference product and cooperation product design creeping characteristic, according to the design size of reference product, carries out mating feature and set
Count the most spacing to carry out；
Described include according to product structure and briquetting pressure selection reference product,
The product that selection reference size is less；
Select the product that the residual stress after molding is less；
The product that reference dimension and residual stress are less designs flexible glue and is less than ebonite soft or hard glue combination, or flexible glue is with hard
The soft or hard glue combination that glue flushes；
It is described at reference product with coordinate and design creeping characteristic on product and include,
Described creeping characteristic is the limit features of tongue and groove, designs groove, limit the flange coordinating product on reference product；
The contact being designed with ebonite of described limit features, when flexible glue is fully mated, the gap of limit features is △ G=
0.1*K mm (millimeter), K are interference coefficient, and flexible glue contact surface is more than the pressure face 1 of flexible glue bed knife～2 times；Two local
Shell deformation △ Y relation between bed knife F1 and F2 and local bed knife is as follows:
Wherein E is flexible glue elastic modelling quantity, and F3 is to correct the power required for the deformation of products between two local force.
Method the most according to claim 1, it is characterised in that E*k*k2> T1*T2, wherein E is flexible glue elastic modelling quantity, and k is
Direct ratio substitutes into coefficient, k2Substituting into coefficient, product elastic deformation thickness on the basis of T1 for inverse ratio, T2 is for coordinating product flexible glue thickness；
Apply the size of external force F to coordinating product and coordinate the flexible glue thickness T2 direct ratio of product:
F=k*T2, so k is direct ratio substitutes into coefficient；
Creep Deformation amount ε and reference product extruded flexible glue thickness T1 are inversely proportional to:
ε=k2/ T1, so k2Coefficient is substituted into for inverse ratio.
Method the most according to claim 2, it is characterised in that flange and recess width T3 >=0.6*T2, described T2 is for joining
Closing the flexible glue thickness of product, described T3 is flange and recess width.
Method the most according to claim 1, it is characterised in that described cooperation production uses the forming temperature of flexible glue side
More than the forming temperature of ebonite side, control the deformation direction of product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310753914.0A CN103692650B (en) | 2013-12-31 | 2013-12-31 | A kind of control method of product shell deformation |
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| CN201310753914.0A CN103692650B (en) | 2013-12-31 | 2013-12-31 | A kind of control method of product shell deformation |
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| CN103692650B true CN103692650B (en) | 2017-01-04 |
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| CN106973527A (en) * | 2017-03-22 | 2017-07-21 | 合肥仁德电子科技有限公司 | The control method of electronic product casing body deformation |
| CN112297448B (en) * | 2020-02-27 | 2022-04-26 | 北京字节跳动网络技术有限公司 | Plastic molding part |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3695340A (en) * | 1970-05-04 | 1972-10-03 | Parsons John T | Multi-part combustible casting pattern having bend-resistant glue-less joints |
| EP0366593A2 (en) * | 1988-10-28 | 1990-05-02 | Emerson Electric Co. | Method of ultrasonically assembling workpieces |
| CN1507481A (en) * | 2001-05-11 | 2004-06-23 | 洛德公司 | Method for joining panels using pre-applied adhesive |
| US6773535B1 (en) * | 2003-03-03 | 2004-08-10 | The United States Of America As Represented By The Secretary Of The Army | Article and method for controlled debonding of elements using shape memory alloy actuators |
-
2013
- 2013-12-31 CN CN201310753914.0A patent/CN103692650B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3695340A (en) * | 1970-05-04 | 1972-10-03 | Parsons John T | Multi-part combustible casting pattern having bend-resistant glue-less joints |
| EP0366593A2 (en) * | 1988-10-28 | 1990-05-02 | Emerson Electric Co. | Method of ultrasonically assembling workpieces |
| CN1507481A (en) * | 2001-05-11 | 2004-06-23 | 洛德公司 | Method for joining panels using pre-applied adhesive |
| US6773535B1 (en) * | 2003-03-03 | 2004-08-10 | The United States Of America As Represented By The Secretary Of The Army | Article and method for controlled debonding of elements using shape memory alloy actuators |
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Application publication date: 20140402 Assignee: Guangzhou Kaide Finance Leasing Co.,Ltd. Assignor: GUANGZHOU GEOELECTRON Co.,Ltd. Contract record no.: 2019990000225 Denomination of invention: Control method for deformation of product shell Granted publication date: 20170104 License type: Exclusive License Record date: 20190709 |
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Denomination of invention: Control method for deformation of product shell Effective date of registration: 20190807 Granted publication date: 20170104 Pledgee: Guangzhou Kaide Finance Leasing Co.,Ltd. Pledgor: GUANGZHOU GEOELECTRON Co.,Ltd. Registration number: Y2019990000044 |
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