CN103272909B - Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces - Google Patents
Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces Download PDFInfo
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- CN103272909B CN103272909B CN201310234074.7A CN201310234074A CN103272909B CN 103272909 B CN103272909 B CN 103272909B CN 201310234074 A CN201310234074 A CN 201310234074A CN 103272909 B CN103272909 B CN 103272909B
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- China
- Prior art keywords
- jaw
- blank
- skin
- covering
- reserved
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Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 27
- 238000003801 milling Methods 0.000 claims abstract description 22
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010422 painting Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
Abstract
The invention provides a forming method capable of guaranteeing quality of chemically-milled thick skin workpieces. The method specifically includes the steps: selecting a non-prestretched plate for producing a skin blank, and reserving jaw clamping allowances in two jaw directions of the skin blank; preparing four process aluminum rods with sizes equal to the reserved jaw clamping allowances in the jaw directions; adhesively bonding the process aluminum rods with the skin blank; adopting a skin stretching machine for prestretching the skin blank to enable the skin blank to form a pre-stretched plate with low internal stress; in a part forming process, adopting an aluminum rod bonding method for guaranteeing clamping force of a jaw of the skin stretching machine on the blank, performing chemical milling after forming, and cutting off the process aluminum rods and the jaw clamping allowances reserved in the jaw directions to form a skin workpiece; and finishing, painting and inspecting. The blank is pre-stretched to enable the internal stress of a skin material to be decreased, so that deformation of chemical milling is reduced, plasticity is excellent during forming, and forming quality of the chemically-milled thick skin workpieces is guaranteed.
Description
Technical field
The present invention relates to a kind of manufacturing process ensureing the thick covering parts quality of milling, belong to aeronautical technology technical field.
Background technology
The thick covering product of milling refers to that part thickness has at more than 3mm a covering product that milling alleviates ledge structure.Such covering product generally has the theoretical profile of Double curve degree, and its contour dimension is comparatively large, and has thinning milling region inside covering.
Above-mentioned milling thick covering product is when skin drawing is shaping, and because material thickness is large, blank is Easily-pasting film not, and large rigidity, large deformation hand finish do not reach part generic inspection code requirement, and especially after part Milling Machining, distortion is serious, cannot repair.
As everyone knows, adopt pretensioning plate can improve the stretch forming precision of part, reduce material internal stress to control milling deflection.But covering supplied materials pretensioning plate specification is less, particularly cost is high, and for the product of small lot, a large amount of pretensioning plate meeting for the placement of orders makes production cost be multiplied.
Summary of the invention
The object of this invention is to provide a kind of manufacturing process ensureing the thick covering parts quality of milling, by blank is carried out prestretched, skin material internal stress is reduced, thus reduce milling distortion, and when being shaped, there is good plasticity, ensure that the forming quality of the thick covering product of milling.
Technical scheme of the present invention: a kind of manufacturing process ensureing the thick covering parts quality of milling, comprises following concrete steps:
(1) the non-pretensioning plate of aluminium alloy or the non-pretensioning plate of titanium alloy is selected to make covering blank, need according to accessory size reserved jaw clamping surplus on two jaw directions of covering blank during making;
(2) preparation 4 technique aluminum strips, it is consistent that the size of technique aluminum strip and jaw reserved on jaw direction clamp surplus;
(3) if covering blank is aluminium alloy, non-pretensioning plate adopts phosphoric acid process, if covering blank is the non-pretensioning plate of titanium alloy, adopts pickling processes, and technique aluminum strip carries out phosphoric acid process simultaneously;
(4) in described in completing steps chemically treated 8 hours, technique aluminum strip is clamped surplus with jaw reserved on jaw direction and aligns, and by using J-116 glued membrane to make technique aluminum strip and covering blank glued joint;
(5) prestretched adopting illiteracy machine drawing to carry out covering blank is shaped;
(6) carry out chemistry milling after being shaped, technique aluminum strip and jaw reserved on jaw direction are clamped together with surplus simultaneously and cut, form covering product;
(7) repair, spray paint, check.
Beneficial effect of the present invention: the present invention is by before covering milling processing, covering blank is carried out prestretched, reduce the hardening capacity of alloy, when making shaping, skin material has good plasticity, and then improve the forming accuracy of covering product, reduce skin material internal stress to control milling deflection, finally improve the forming quality of the thick covering product of milling; When covering blank carries out prestretched, realize increasing friction by setting up technique aluminum strip at jaw, ensure effective clamping of jaw, realize the prestretched of supplied materials; Adopt technique aluminum strip to carry out pulling action, can also make covering product when being shaped closer to theoretical values, precision meets Tolerance Allocation requirement, while therefore ensureing covering product forming quality, also reduces production cost.
Accompanying drawing explanation
Fig. 1 is that the thick covering blank of the present invention and technique aluminum strip combine schematic diagram.
Detailed description of the invention
As shown in Figure 1, a kind of manufacturing process ensureing the thick covering parts quality of milling, comprises following concrete steps:
(1) the non-pretensioning plate of aluminium alloy or the non-pretensioning plate of titanium alloy is selected to make covering blank, need according to accessory size reserved jaw clamping surplus on two jaw directions 2 of covering blank 1 during making, this clamping surplus is specially: width is 45mm, and length equals the length of covering blank 1;
(2) 4 technique aluminum strips 3 are prepared, technique aluminum strip 3 adopts LY12, and it is consistent that the size due to technique aluminum strip needs to clamp surplus with jaw reserved on jaw direction, and therefore the width of technique aluminum strip 3 is 45mm, thickness is 1.2mm, and length equals the length of covering blank 1 equally;
(3) if covering blank 1 is aluminium alloy, non-pretensioning plate adopts phosphoric acid process, if covering blank 1 is the non-pretensioning plate of titanium alloy, adopts pickling processes, and technique aluminum strip 3 carries out phosphoric acid process simultaneously;
(4) described in completing steps 3 chemically treated 4 constantly little, technique aluminum strip 3 clamp surplus with jaw reserved on jaw direction 2 and aligns, and by use J-116 glued membrane, technique aluminum strip 3 and covering blank 1 are gluedd joint;
(5) employing is covered machine drawing and is clamped the prestretched shaping that jaw carries out covering blank 1;
(6) carry out chemistry milling after being shaped, technique aluminum strip 3 and jaw reserved on jaw direction 2 are clamped together with surplus simultaneously and cut, the covering product of formation is not distorted distortion;
(7) spray paint, inspection meets the requirements.
Claims (1)
1. ensure a manufacturing process for the thick covering parts quality of milling, it is characterized in that comprising following concrete steps:
(1) the non-pretensioning plate of aluminium alloy or the non-pretensioning plate of titanium alloy is selected to make covering blank, need according to accessory size in the upper reserved jaw clamping surplus of two jaw directions (2) of covering blank (1) during making;
(2) prepare 4 technique aluminum strips (3), it is consistent that the size of technique aluminum strip (3) and jaw direction (2) upper jaw reserved clamp surplus;
(3) if covering blank (1) adopts phosphoric acid process for the non-pretensioning plate of aluminium alloy, if covering blank (1) is the non-pretensioning plate of titanium alloy, adopt pickling processes, technique aluminum strip (3) carries out phosphoric acid process simultaneously;
(4) in described chemically treated 8 hours of completing steps (3), upper to technique aluminum strip (3) and jaw direction (2) reserved jaw is clamped surplus and aligns, and by using J-116 glued membrane to make technique aluminum strip (3) and covering blank (1) glued joint;
(5) prestretched adopting illiteracy machine drawing to carry out covering blank is shaped;
(6) carry out chemistry milling after being shaped, upper to technique aluminum strip (3) and jaw direction (2) reserved jaw is clamped together with surplus simultaneously and cut, formation covering product;
(7) repair, spray paint, check.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310234074.7A CN103272909B (en) | 2013-06-14 | 2013-06-14 | Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310234074.7A CN103272909B (en) | 2013-06-14 | 2013-06-14 | Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103272909A CN103272909A (en) | 2013-09-04 |
| CN103272909B true CN103272909B (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310234074.7A Expired - Fee Related CN103272909B (en) | 2013-06-14 | 2013-06-14 | Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces |
Country Status (1)
| Country | Link |
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| CN (1) | CN103272909B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934492A (en) * | 2014-04-04 | 2014-07-23 | 中航沈飞民用飞机有限责任公司 | Milling method capable of evenly releasing milling stress of skin machine |
| CN105088230B (en) * | 2014-05-07 | 2017-11-24 | 哈尔滨飞机工业集团有限责任公司 | Reduce the process of helicopter milling sheet metal component stress deformation |
| CN104588474A (en) * | 2014-11-26 | 2015-05-06 | 江西洪都航空工业集团有限责任公司 | Skin part longitudinal stretching woolen size determination method |
| CN104971975B (en) * | 2015-07-15 | 2017-07-21 | 江西洪都航空工业集团有限责任公司 | It is a kind of to stretch the covering forming technology being combined with punching press |
| CN107009096B (en) * | 2017-04-12 | 2018-11-02 | 哈尔滨工业大学 | A method of manufacturing multi-layer hollow structure using closed cross-section pipe |
| CN107470433A (en) * | 2017-07-04 | 2017-12-15 | 西安飞机工业（集团）有限责任公司 | A kind of method of stretch forming of curved surface aircraft skin part |
| CN110369772B (en) * | 2019-08-07 | 2020-10-13 | 沈阳飞机工业（集团）有限公司 | Chemical milling edge processing method for aluminum alloy skin |
| CN110296650B (en) * | 2019-08-07 | 2024-04-16 | 沈阳飞机工业（集团）有限公司 | Flexible measurement ruler for skin stretching deformation and application method thereof |
| CN114789326B (en) * | 2022-06-01 | 2023-06-27 | 沈阳飞机工业（集团）有限公司 | Processing method of large-sized front edge skin part |
| CN115122049B (en) * | 2022-06-22 | 2023-07-25 | 四川航天长征装备制造有限公司 | Melon petal chemical milling template processing and positioning method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6675624B2 (en) * | 2000-07-13 | 2004-01-13 | Fokker Aerostructures B.V. | Method and device for producing a double-curved sheet-like object by means of stretch-forming |
| US7568371B2 (en) * | 2006-01-17 | 2009-08-04 | Cyril Bath Company | Stretch-forming machine and method |
| US8833126B2 (en) * | 2008-06-12 | 2014-09-16 | John R. Buta | Stretching device |
| GB0812614D0 (en) * | 2008-07-10 | 2008-08-20 | Univ Ulster | Metal forming |
| CN102327943B (en) * | 2011-11-02 | 2013-10-09 | 沈阳飞机工业（集团）有限公司 | Flexible hydraulic jaw |
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- 2013-06-14 CN CN201310234074.7A patent/CN103272909B/en not_active Expired - Fee Related
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| CN103272909A (en) | 2013-09-04 |
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Granted publication date: 20150513 |