CN103272909A - 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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- CN103272909A CN103272909A CN2013102340747A CN201310234074A CN103272909A CN 103272909 A CN103272909 A CN 103272909A CN 2013102340747 A CN2013102340747 A CN 2013102340747A CN 201310234074 A CN201310234074 A CN 201310234074A CN 103272909 A CN103272909 A CN 103272909A
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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 that guarantees the thick covering parts quality of milling, belong to the aeronautical technology technical field.
Background technology
The thick covering product of milling refers to part thickness more than 3mm and has the covering product that milling alleviates ledge structure.Such covering product generally has the theoretical profile of hyperbolic degree, and its contour dimension is bigger, and there is the milling zone of attenuate the covering inboard.
The thick covering product of above-mentioned milling is when the covering drawing and forming, because material thickness is big, blank is Easily-pasting film not, and big rigidity, large deformation hand finish do not reach part generic inspection code requirement, and especially after the part milling processing, distortion is serious, can't repair.
As everyone knows, adopt pretensioning plate can improve the stretch forming precision of part, reduce material internal stress with control milling deflection.Yet covering supplied materials pretensioning plate specification is less, cost height particularly, and for the product of small lot, a large amount of pretensioning plate meetings for the placement of orders are multiplied production cost.
Summary of the invention
The purpose of this invention is to provide a kind of manufacturing process that guarantees the thick covering parts quality of milling, by blank is carried out prestretched, the skin material internal stress is reduced, thereby reduce the milling distortion, and when being shaped, have good plasticity, guaranteed the forming quality of the thick covering product of milling.
Technical scheme of the present invention: a kind of manufacturing process that guarantees the thick covering parts quality of milling comprises following concrete steps:
(1) selects the non-pretensioning plate of the non-pretensioning plate of aluminium alloy or titanium alloy to make the covering blank, need during making to reserve jaw clamping surplus according to accessory size in two jaw directions of covering blank;
(2) prepare 4 technology aluminum strips, the jaw clamping surplus of reserving on the size of technology aluminum strip and the jaw direction is consistent;
(3) non-pretensioning plate adopts phosphoric acid to handle if the covering blank is aluminium alloy, if the covering blank is the non-pretensioning plate of titanium alloy then adopts pickling processes that the technology aluminum strip carries out the phosphoric acid processing simultaneously;
(4) in described chemically treated 8 hours of completing steps, the jaw clamping surplus of reserving on technology aluminum strip and the jaw direction is alignd, and by using the J-116 glued membrane to make technology aluminum strip and the splicing of covering blank;
(5) prestretched of adopting the illiteracy machine drawing to carry out the covering blank is shaped;
(6) carry out chemistry milling after the shaping, the jaw clamping surplus of simultaneously the technology aluminum strip being reserved on the jaw direction is cut, and forms the covering product;
(7) repair, spray paint, check.
Beneficial effect of the present invention: the present invention is by before covering milling processing, the covering blank is carried out prestretched, reduced the hardening capacity of alloy, skin material has good plasticity when making shaping, and then improved the forming accuracy of covering product, reduce the skin material internal stress with control milling deflection, finally improved the forming quality of the thick covering product of milling; When the covering blank carries out prestretched, realize increasing friction by set up the technology aluminum strip at jaw, guarantee effective clamping of jaw, realize the prestretched of supplied materials; The action that stretches of adopting process aluminum strip, can also make the covering product when being shaped more near theoretical numerical value, precision meets the Tolerance Allocation requirement, when therefore guaranteeing covering product forming quality, has also reduced production cost.
Description of drawings
Fig. 1 is the thick covering blank of the present invention and technology aluminum strip combination schematic diagram.
The specific embodiment
As shown in Figure 1, a kind of manufacturing process that guarantees the thick covering parts quality of milling comprises following concrete steps:
(1) select the non-pretensioning plate of the non-pretensioning plate of aluminium alloy or titanium alloy to make the covering blank, need during making to reserve jaw clamping surplus according to accessory size in two jaw directions 2 of covering blank 1, this clamping surplus is specially: width is 45mm, and length equals the length of covering blank 1;
(2) prepare 4 technology aluminum strips 3, technology aluminum strip 3 adopts LY12, because the size of technology aluminum strip need be consistent with the jaw clamping surplus reserved on the jaw direction, so the width of technology aluminum strip 3 is 45mm, thickness is 1.2mm, and length equals the length of covering blank 1 equally;
(3) non-pretensioning plate adopts phosphoric acid to handle if covering blank 1 is aluminium alloy, if covering blank 1 is the non-pretensioning plate of titanium alloy then adopts pickling processes that technology aluminum strip 3 carries out the phosphoric acid processing simultaneously;
(4) at completing steps 3 described chemically treated 4 hours the time, the jaw clamping surplus of reserving on technology aluminum strip 3 and the jaw direction 2 is alignd, and by using the J-116 glued membrane that technology aluminum strip 3 and covering blank 1 are gluedd joint;
(5) adopt the illiteracy machine drawing to clamp the prestretched shaping that jaw carries out covering blank 1;
(6) carry out chemistry milling after being shaped, the jaw clamping surplus that technology aluminum strip 3 is reserved on jaw direction 2 is cut simultaneously, the distortion that is not distorted of the covering product of formation;
(7) spray paint, check meets the requirements.
Claims (1)
1. manufacturing process that guarantees the thick covering parts quality of milling is characterized in that comprising following concrete steps:
(1) selects the non-pretensioning plate of the non-pretensioning plate of aluminium alloy or titanium alloy to make the covering blank, need during making to reserve jaw clamping surplus according to accessory size in two jaw directions (2) of covering blank (1);
(2) prepare 4 technology aluminum strips (3), the size of technology aluminum strip (3) is consistent with the jaw clamping surplus that jaw direction (2) goes up reservation;
(3) non-pretensioning plate adopts phosphoric acid to handle if covering blank (1) is aluminium alloy, if covering blank (1) is the non-pretensioning plate of titanium alloy then adopts pickling processes that technology aluminum strip (3) carries out the phosphoric acid processing simultaneously;
(4) in described chemically treated 8 hours of completing steps (3), technology aluminum strip (3) and jaw direction (2) are gone up the jaw clamping surplus of reserving align, and by using the J-116 glued membrane that technology aluminum strip (3) and covering blank (1) are gluedd joint;
(5) prestretched of adopting the illiteracy machine drawing to carry out the covering blank is shaped;
(6) carry out chemistry milling after the shaping, simultaneously technology aluminum strip (3) is gone up the jaw clamping surplus of reserving with jaw direction (2) and cut, form the covering product;
(7) repair, spray paint, check.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310234074.7A CN103272909B (en) | 2013-06-14 | 2013-06-14 | Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310234074.7A CN103272909B (en) | 2013-06-14 | 2013-06-14 | Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces |
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| CN103272909A true CN103272909A (en) | 2013-09-04 |
| CN103272909B CN103272909B (en) | 2015-05-13 |
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Cited By (11)
| 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 |
| 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 |
| CN104971975A (en) * | 2015-07-15 | 2015-10-14 | 江西洪都航空工业集团有限责任公司 | Skin forming technology combining stretching and stamping |
| CN105088230A (en) * | 2014-05-07 | 2015-11-25 | 哈尔滨飞机工业集团有限责任公司 | Technological method for reducing stress deformation of helicopter chemically-milled sheet metal members |
| CN107009096A (en) * | 2017-04-12 | 2017-08-04 | 哈尔滨工业大学 | A kind of method that utilization closed cross-section pipe manufactures multi-layer hollow structure |
| 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 |
| CN110296650A (en) * | 2019-08-07 | 2019-10-01 | 沈阳飞机工业（集团）有限公司 | A kind of skin drawing deflection flexible measuring patch ruler and its application method |
| CN110369772A (en) * | 2019-08-07 | 2019-10-25 | 沈阳飞机工业（集团）有限公司 | A kind of aluminum alloy outer cover milling edge processing method |
| CN114789326A (en) * | 2022-06-01 | 2022-07-26 | 沈阳飞机工业（集团）有限公司 | Machining method of large-scale front edge skin part |
| CN115122049A (en) * | 2022-06-22 | 2022-09-30 | 四川航天长征装备制造有限公司 | Melon petal chemical milling sample plate processing and positioning method thereof |
| 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 |
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Cited By (14)
| 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 |
| CN105088230A (en) * | 2014-05-07 | 2015-11-25 | 哈尔滨飞机工业集团有限责任公司 | Technological method for reducing stress deformation of helicopter chemically-milled sheet metal members |
| 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 |
| CN104971975A (en) * | 2015-07-15 | 2015-10-14 | 江西洪都航空工业集团有限责任公司 | Skin forming technology combining stretching and stamping |
| 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 |
| CN107009096A (en) * | 2017-04-12 | 2017-08-04 | 哈尔滨工业大学 | A kind of method that utilization closed cross-section pipe manufactures multi-layer hollow structure |
| 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 |
| CN110296650A (en) * | 2019-08-07 | 2019-10-01 | 沈阳飞机工业（集团）有限公司 | A kind of skin drawing deflection flexible measuring patch ruler and its application method |
| CN110369772A (en) * | 2019-08-07 | 2019-10-25 | 沈阳飞机工业（集团）有限公司 | A kind of aluminum alloy outer cover milling edge processing method |
| 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 |
| CN114789326A (en) * | 2022-06-01 | 2022-07-26 | 沈阳飞机工业（集团）有限公司 | Machining method of large-scale front edge skin part |
| 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 |
| CN115122049A (en) * | 2022-06-22 | 2022-09-30 | 四川航天长征装备制造有限公司 | Melon petal chemical milling sample plate processing and positioning method thereof |
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