CN108237173A - A kind of Double curve degree rectangle strengthens the rubber hydrochloride method of inside panel - Google Patents
A kind of Double curve degree rectangle strengthens the rubber hydrochloride method of inside panel Download PDFInfo
- Publication number
- CN108237173A CN108237173A CN201711292946.XA CN201711292946A CN108237173A CN 108237173 A CN108237173 A CN 108237173A CN 201711292946 A CN201711292946 A CN 201711292946A CN 108237173 A CN108237173 A CN 108237173A
- Authority
- CN
- China
- Prior art keywords
- mold
- laminate
- rubber hydrochloride
- inside panel
- blank
- 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.)
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Classifications
-
- 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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/005—Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D53/00—Making other particular articles
- B21D53/92—Making other particular articles other parts for aircraft
Abstract
The present invention provides a kind of Double curve degree rectangles to strengthen inside panel rubber hydrochloride method.This method includes a rubber hydrochloride mold, is further added by bound edge surplus along die edge on the basis of loft developed dimension, using compression bed course plate substep laying, gradually increases the deflection of blank, achieve the purpose that gradually to shape.Rubber hydrochloride is opened inner hole part forming and is finished.The present invention meets the product of design requirement using rubber hydrochloride technical limit spacing stable quality.The fold caused by material flowing is too fast can be effectively controlled, substantially reduces and strikes the amount of repairing by hand.
Description
Technical field
The invention belongs to a kind of forming techniques of Aircraft Sheet Metal Parts manufacturing field, are answered suitable for aluminium alloy sheet, type face
Miscellaneous curved surface lid class inside panel part jumpy, it is specifically a kind of for Double curve degree, the complicated covering of rectangular band reinforcing rib
Rubber hydrochloride method.
Background technology
Aircraft Sheet Metal Parts complex technical process, control is stringent, such as the maintenance lid on aircraft strengthens side part, ruler
It is very little it is larger, material is thin, be that a kind of Double curve degree rectangle strengthens inside panel.Part shape face will be glued with fuselage theory shape face, surface quality
All very high with forming accuracy requirement, due to complicated, it is forming side that is economic and practical and can meeting quality requirement to select a kind of
Method is relatively difficult.
This Double curve degree strengthens the forming of inside panel part, generally using two methods.One kind is drop forming, due into
During shape, material deformation rule is not easy to grasp, and falls pressing mold without flanging and positioning device, the easy play of part.Woollen size one
As be difficult calculated with formula, practical experience is needed to primarily determine process allowance；It using trial-production, gradually corrects, could shape.Again
Have that part forming accuracy and surface quality are poor, and rejection rate is higher.For being glued skin part, surface quality and shape are accurate
Exactness requirement is high, and requirement is had been unable to meet using drop forming.The second is conventional drawing and forming, since material is thin, strengthens
Muscle is deep, and in drawing process, reinforcing rib flange return R at, plate is easily by drawing crack, Material shrinkage generation fold at flange planes,
Slab edge loosens injustice, secondly because part is sprung back, reinforcing rib depth is inadequate, then is deformed after having part heat treatment, also needs to increase
Add the manual correction of the flank shape correction of type tire cooperation, the surface quality of workpieces being shaped so as to out is difficult to meet splicing requirement.
Invention content
Strengthen inside panel shaping surface quality and reduction number of molds, mesh of the invention to solve Double curve degree rectangle
Be that providing a kind of Double curve degree rectangle strengthens inside panel rubber hydrochloride method.This method includes a rubber hydrochloride
Mold, mold are punch-pin, and type face is part inner mold to be formed, and bottom centre sets that there are one gas vents, increases reinforcement height 4%
~5%H, specific manufacturing process step are as follows：
Step 1 inside panel unfolding calculation method：Increase bound edge surplus L on the basis of loft developed dimension0, it is made to get mould
After having edge, 20~25mm wide is further added by along die edge, expanded blank endoporus is not open-minded；
Step 2 ply sequence：Using compression bed course plate substep laying, gradually increase the deflection of blank, reach by
The purpose gradually shaped.Laminate uses plastic plate, and plate thickness is 3~5mm, changes bedding thickness by being superimposed laying.
Step 3 rubber hydrochloride
Laminate thickness δ at 3-1 outer rims1It is consistent with mold reinforcement height, laminate thickness δ at cavity2For reinforcement height 1/
2, using 50bar pressure preforms, bound edge surplus is coated on mold, is formedType；
3-2 is along the blank edge shearing surplus of 20mm~25, laminate thickness δ at outer rim1It pads to reinforcement height 1/2, cavity
Place's laminate removes, and uses 80bar pressure formings；
3-3 all removes laminate, is forced into 200bar formings, and blank is fitted on mold completely；
3-4 removes surplus, opens inner hole part forming and finishes.
The beneficial effects of the present invention are：1) strengthen the forming mode of inside panel by change so that part quality is able to
Ensure, realization is phased out drop forming technology, using rubber hydrochloride technical limit spacing stable quality, meets design requirement
Product.2) process being combined using layer-stepping, low pressure preform, is effectively controlled part deformation, increased indirectly
The part forming limit has practical application and promotional value for the very complicated hyperbolic surface parts of geometric shape.3) to hair is unfolded
Base optimizes, and by constructing a transition body in forming process, can effectively control and wrinkle caused by material flowing is too fast
Folding substantially reduces and strikes the amount of repairing by hand.
Attached drawing is described in further detail the application with reference to embodiments.
Description of the drawings
Fig. 1 Double curve degrees rectangle strengthens inside panel overall structure figure
Fig. 2 inside panel schematic cross-sections
Fig. 3 hydraulic die overall structure figures
Fig. 4 hydraulic die schematic cross-sections
Fig. 5 first steps shape schematic diagram
Fig. 6 second steps shape schematic diagram
Fig. 7 thirds step forming schematic diagram
Explanation is numbered in figure：It is 1 inside panel, 2 part outer rims, 3 reinforcing ribs, 4 molds, 5 gas vents, 6 mold reinforcing ribs, 7 recessed
Chamber, 8 part edge lines, laminate at 9 cavitys, 10 bound edge surpluses, laminate at 11 outer rims
Specific embodiment
Referring to attached drawing, embodiment is certain type machine overhauling lid inside panel, and structure is a kind of Double curve degree square as shown in Figs. 1-2
Shape strengthens inside panel 1, and material, which is that LY12-M- δ 0.8 are relatively thin, is heat-treated to CZ states.During part forming 2 corner area of outer rim with
Shrinkage mark is generated at outer plane, at the upper lower edge R of 3 corner of reinforcing rib, plate is easily by drawing crack.
As shown in Figs 1-4, mold 2 is punch-pin to the rubber hydrochloride mould structure that the application proposes, type face is inside panel 1
Inner mold, increases the 4%~5%H of height of mold reinforcing rib 6, and 7 center of cavity sets that there are one gas vents 5.Inside panel manufacturing process is as schemed
5-7：
1 unfolding calculation method of step 1 inside panel：The theoretical expanded blank of inside panel 1 is put down according to what loft was calculated
Face expansion shape, increases bound edge surplus 9 on its basis, after length is part edge line 8 to die edge, along die edge again
Increase by 20~25mm wide, expanded blank endoporus is not open-minded；
11 thickness of laminate and mold reinforcing rib 6 are highly consistent at step 2 outer rim, and 9 thickness of laminate is strengthened for mold at cavity
6 height 1/2 of muscle, using 50bar pressure preforms, is gradually coated on by rubber pocket pressure action material stress on mold 4；Bound edge
Surplus 10 is formedType makes plate, by action of pulling stress, reduce plate in 4 plane model of mold along the normal direction at 4 edge of mold
Interior tangential contraction strain is enclosed, the pressure-pad-force for increasing part outer rim 2 plays the role of blank holder, prevents part outer rim 2 in corner
The phenomenon that wrinkle is with injustice is loosened at the wrinkling and plane that area occurs；Laminate 9 is 6 height one of mold reinforcing rib at cavity
Half, low pressure preform makes material easier be pressed into cavity 7, plays the role of bin stock and forms Fig. 3 design of part.
Step 3 shears 20~25mm surpluses along blank edge, makes the no longer coating mould 4 of bound edge surplus 10, laminate at outer rim
To the height of mold reinforcing rib 6 1/2, laminate 9 removes 11 thickness pads at cavity, goes out Fig. 4 part knots using 80bar pressure preforms
Structure.Part outer rim 2 is generated tangential contraction strain by rubber pressure, and the compression of cavity 7 continues to be plastically deformed, because have bin stock with
Good material flowability avoids the drawing crack phenomenon by radial direction tensile stress and tangential stress generation when deforming at corner R.
Step 4 all removes laminate at outer rim 11, is forced into 200bar formings, and part outer rim 2 is continued by rubber pressure
Tangential contraction strain is generated, blank, which is fitted in completely on mold 4, shapes Fig. 5 uniformities, and surface quality is smooth lossless
Design of part, according to drawing requirement remove surplus, open inner hole part forming finish.
It is worth noting that such reinforcement inside panel general size is larger, material is thin, it, should be first when the method is used to shape
Laminate bed course work at outer rim 2 and cavity 5 on mold is completed, is paid attention at 6, laminate answers chamfering at 7, then before forming by plate
Heat treatment smoothing makes to complete in the timeliness phase of entire forming process after heat treatment, can be deformed in this way to avoid parts quenching
The manual correction that brings and because surface quality of workpieces is destroyed caused by manual correction the drawbacks of.
Claims (1)
1. a kind of Double curve degree rectangle strengthens the rubber hydrochloride method of inside panel, it is characterised in that including a rubber hydraulic pressure into
Shape mold, the mold are punch-pin, and type face is part inner mold to be formed, and bottom centre is set there are one gas vent, increases reinforcing rib
Highly 4%~5%H, specific manufacturing process step are as follows：
Step 1 inside panel blank unfolding calculation：Increase bound edge surplus L on the basis of loft developed dimension0, surplus L0Get mold
Behind edge, 20~25mm mm wide are further added by along die edge, expanded blank endoporus is not open-minded；
Step 2 ply sequence uses compression bed course plate substep laying, and laminate uses plastic plate, and plate thickness is 3~5mm, by folded
Overlay changes bedding thickness
Laminate thickness δ at 2-1 outer rims1It is consistent with mold reinforcement height, laminate thickness δ at cavity2It is low for reinforcement height 1/2
Pressure preform
Laminate thickness δ at 2-2 outer rims1Pad is to reinforcement height 1/2, and laminate removes at cavity, and pressurize preform
2-3 all removes laminate, press molding；
Step 3 rubber hydrochloride
3-1 uses 50bar pressure preforms, and bound edge surplus is coated on mold, is formedType
3-2 shears 20mm surpluses along blank edge, uses 80bar pressure formings
3-3 is forced into 200bar formings, and blank is fitted on mold completely
3-4 removes surplus, opens inner hole part forming and finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711292946.XA CN108237173A (en) | 2017-12-08 | 2017-12-08 | A kind of Double curve degree rectangle strengthens the rubber hydrochloride method of inside panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711292946.XA CN108237173A (en) | 2017-12-08 | 2017-12-08 | A kind of Double curve degree rectangle strengthens the rubber hydrochloride method of inside panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108237173A true CN108237173A (en) | 2018-07-03 |
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ID=62700133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711292946.XA Pending CN108237173A (en) | 2017-12-08 | 2017-12-08 | A kind of Double curve degree rectangle strengthens the rubber hydrochloride method of inside panel |
Country Status (1)
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| CN (1) | CN108237173A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109692911A (en) * | 2018-12-10 | 2019-04-30 | 上海航天设备制造总厂有限公司 | A kind of large size toroidal shell part monolithic molding device and method |
| CN111085595A (en) * | 2019-12-13 | 2020-05-01 | 西安飞机工业（集团）有限责任公司 | Rubber forming method for multi-winding deep rib structure thin-wall reinforced panel part |
| CN112613117A (en) * | 2020-12-11 | 2021-04-06 | 成都飞机工业（集团）有限责任公司 | Rapid construction and design method for aviation flap from unfolding size to 3D |
| CN113649467A (en) * | 2021-07-27 | 2021-11-16 | 中航西安飞机工业集团股份有限公司 | Method for forming lip of large-size near-revolving-body engine |
| CN113680885A (en) * | 2021-07-30 | 2021-11-23 | 江西昌河航空工业有限公司 | Auxiliary method suitable for stretching forming of aluminum alloy sheet part |
| CN113857356A (en) * | 2021-11-09 | 2021-12-31 | 西安航空学院 | Forming die and method for airplane skin parts |
| CN114273854A (en) * | 2020-10-30 | 2022-04-05 | 哈尔滨哈飞航空工业有限责任公司 | Method for forming special-shaped opening frame skin reinforcement part |
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| CN102581111A (en) * | 2012-02-02 | 2012-07-18 | 哈尔滨飞机工业集团有限责任公司 | Pressure forming method for thin plate aluminum alloy opening frames |
| CN104511513A (en) * | 2013-09-30 | 2015-04-15 | 哈尔滨飞机工业集团有限责任公司 | Drawing method of edge sealing frame type part hydraulically formed based on rubber bladder |
| CN106001229A (en) * | 2016-07-01 | 2016-10-12 | 中航飞机股份有限公司西安飞机分公司 | Forming method and mold for multi-reinforcing-rib sheet metal part rubber bag made from plate |
| CN106475466A (en) * | 2016-10-19 | 2017-03-08 | 中航飞机股份有限公司西安飞机分公司 | A kind of shallow cavity part rubber pad forming method of thin plate and type tire |
| CN106825096A (en) * | 2017-03-23 | 2017-06-13 | 西安飞机工业（集团）有限责任公司 | The rubber pad forming method and shaping dies of a kind of deep camber flange sheet metal part high |
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| US7155949B2 (en) * | 2002-05-08 | 2007-01-02 | Avure Technologies Ab | Fluid cell press with a gripping arrangement and method and use of the press |
| CN102581111A (en) * | 2012-02-02 | 2012-07-18 | 哈尔滨飞机工业集团有限责任公司 | Pressure forming method for thin plate aluminum alloy opening frames |
| CN104511513A (en) * | 2013-09-30 | 2015-04-15 | 哈尔滨飞机工业集团有限责任公司 | Drawing method of edge sealing frame type part hydraulically formed based on rubber bladder |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109692911A (en) * | 2018-12-10 | 2019-04-30 | 上海航天设备制造总厂有限公司 | A kind of large size toroidal shell part monolithic molding device and method |
| CN109692911B (en) * | 2018-12-10 | 2020-10-16 | 上海航天设备制造总厂有限公司 | Integral forming device and method for large-scale ring shell part |
| CN111085595A (en) * | 2019-12-13 | 2020-05-01 | 西安飞机工业（集团）有限责任公司 | Rubber forming method for multi-winding deep rib structure thin-wall reinforced panel part |
| CN114273854A (en) * | 2020-10-30 | 2022-04-05 | 哈尔滨哈飞航空工业有限责任公司 | Method for forming special-shaped opening frame skin reinforcement part |
| CN112613117A (en) * | 2020-12-11 | 2021-04-06 | 成都飞机工业（集团）有限责任公司 | Rapid construction and design method for aviation flap from unfolding size to 3D |
| CN112613117B (en) * | 2020-12-11 | 2022-08-12 | 成都飞机工业（集团）有限责任公司 | Rapid construction and design method for aviation flap from unfolding size to 3D |
| CN113649467A (en) * | 2021-07-27 | 2021-11-16 | 中航西安飞机工业集团股份有限公司 | Method for forming lip of large-size near-revolving-body engine |
| CN113680885A (en) * | 2021-07-30 | 2021-11-23 | 江西昌河航空工业有限公司 | Auxiliary method suitable for stretching forming of aluminum alloy sheet part |
| CN113857356A (en) * | 2021-11-09 | 2021-12-31 | 西安航空学院 | Forming die and method for airplane skin parts |
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Application publication date: 20180703 |