CN103203735B - A kind of scribble method of curved surface lead-covering profile - Google Patents
A kind of scribble method of curved surface lead-covering profile Download PDFInfo
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- CN103203735B CN103203735B CN201310145486.3A CN201310145486A CN103203735B CN 103203735 B CN103203735 B CN 103203735B CN 201310145486 A CN201310145486 A CN 201310145486A CN 103203735 B CN103203735 B CN 103203735B
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Abstract
The invention belongs to aircraft skin manufacturing technology, relate to the improvement to curved surface lead-covering profile scribble method.It is characterized in that, the step of line is as follows: increase technique lug line of cut and process blind pin-and-hole and alignment pin; Manufacture composite face mold; Boring; Line.The present invention can eliminate the hammer trace at lead-covering edge, ensure that the surface quality of lead-covering, product percent of pass.
Description
Technical field
The invention belongs to aircraft skin manufacturing technology, relate to the improvement to curved surface lead-covering profile scribble method.Background technology
The feature of aircraft lead-covering is that size is large, complex contour, and surface quality requirements is high, and see Fig. 1, this is the structure example of an aircraft lead-covering.Its edge is complex curve, and surface is with complex profile.Fig. 2 is the face of lead-covering stretching fetalism shown in shaping Fig. 1 schematic diagram.The forming process of aircraft lead-covering is: the profile of lead-covering is that aluminium sheet is formed lead-covering blank on stretching fetalism face after pull-shaped.In order to obtain the contour shape of lead-covering, stretching fetalism face 2 is provided with part line of cut 3, after the profile of stretched lead-covering, need to use aid such as rubber slab firmly to pat lead-covering outer surface, the part line of cut 3 on stretching fetalism face 2 is printed on lead-covering inner surface.When cutting, cutting away the redundance of lead-covering blank along part line of cut 3, finally forming aircraft lead-covering as shown in Figure 1.Its shortcoming is: due to when reverse-printed part line of cut 3, need the outer surface repeatedly beaing lead-covering blank, make shaping after lead-covering edge have hammer trace, affect the surface quality of lead-covering, product percent of pass is lower.
Summary of the invention
The object of the invention is: propose a kind of curved surface lead-covering profile scribble method eliminating lead-covering edge hammer trace, to ensure the surface quality of lead-covering, improve product percent of pass.
Technical scheme of the present invention is: a kind of scribble method of curved surface lead-covering profile, and lead-covering outline line drawn by the covering blank of stretched lead-covering profile, and it is characterized in that, the step of line is as follows:
1, increase technique lug line of cut and process blind pin-and-hole and alignment pin:, lead-covering profile cut line (3) upper increase by two technique lug lines of cut (4) upper in stretching fetalism face (2), two technique lug lines of cut (4) lay respectively at the two ends of lead-covering profile cut line (3) length direction, in the region that each technique lug line of cut (4) is surrounded, process a blind pin-and-hole (5); Process two alignment pins, the external diameter of alignment pin and blind pin-and-hole (5) matched in clearance;
2, composite face mold is manufactured: with the fetalism face (2) that stretches for paving mould, paving material prepreg in the region that lead-covering profile cut line (3) and technique lug line of cut (4) surround, paving thickness is 8mm ~ 12mm, embedded with metal lining in the region that composite face mold technique lug line of cut (4) is surrounded, the position of metal lining is corresponding with the position of the upper blind pin-and-hole (5) in stretching fetalism face (2), and the aperture of metal lining equals the aperture of blind pin-and-hole (5); Then normal temperature cure is at least taken off after 48h;
3, hole: covered by composite face mold on the covering blank of stretched lead-covering profile, profile being fitted, is that drill bushing processes covering blank dowel hole with metal lining;
4, rule: first, covering blank is placed on stretching fetalism face (2), again composite face mold is covered on covering blank, two alignment pins are inserted respectively in the upper blind pin-and-hole (5) in the lining endoporus of composite face mold, the covering blank dowel hole of covering blank and stretching fetalism face (2), three is accurately located; Then, scriber is used on covering blank, to mark outline line as line of cut along the edge of composite face mold; When cutting curved surface lead-covering, excise two technique lugs simultaneously.
Advantage of the present invention is: the hammer trace eliminating lead-covering edge, ensure that the surface quality of lead-covering, product percent of pass.Test proves, after adopting the present invention, lead-covering edge does not exist hammer trace, and product percent of pass improves more than 80%.
Accompanying drawing explanation
Fig. 1 is the structure example of an aircraft lead-covering.
Fig. 2 is the stretching fetalism face schematic diagram for the shaping profile of lead-covering as shown in Figure 1.
Fig. 3 is stretching fetalism face used in the present invention schematic diagram.
Detailed description of the invention
Below the present invention is described in further details.See Fig. 3, a kind of scribble method of curved surface lead-covering profile, lead-covering outline line drawn by the covering blank of stretched lead-covering profile, and it is characterized in that, the step of line is as follows:
1, increase technique lug line of cut and process blind pin-and-hole and alignment pin:, lead-covering profile cut line (3) upper increase by two technique lug lines of cut (4) upper in stretching fetalism face (2), two technique lug lines of cut (4) lay respectively at the two ends of lead-covering profile cut line (3) length direction, in the region that each technique lug line of cut (4) is surrounded, process a blind pin-and-hole (5); Process two alignment pins, the external diameter of alignment pin and blind pin-and-hole (5) matched in clearance;
2, composite face mold is manufactured: with the fetalism face (2) that stretches for paving mould, paving material prepreg in the region that lead-covering profile cut line (3) and technique lug line of cut (4) surround, paving thickness is 8mm ~ 12mm, embedded with metal lining in the region that composite face mold technique lug line of cut (4) is surrounded, the position of metal lining is corresponding with the position of the upper blind pin-and-hole (5) in stretching fetalism face (2), and the aperture of metal lining equals the aperture of blind pin-and-hole (5); Then normal temperature cure is at least taken off after 48h;
3, hole: covered by composite face mold on the covering blank of stretched lead-covering profile, profile being fitted, is that drill bushing processes covering blank dowel hole with metal lining;
4, rule: first, covering blank is placed on stretching fetalism face (2), again composite face mold is covered on covering blank, two alignment pins are inserted respectively in the upper blind pin-and-hole (5) in the lining endoporus of composite face mold, the covering blank dowel hole of covering blank and stretching fetalism face (2), three is accurately located; Then, scriber is used on covering blank, to mark outline line as line of cut along the edge of composite face mold; When cutting curved surface lead-covering, excise two technique lugs simultaneously.
The present invention, by manufacturing face mold, eliminates the operation of reverse-printed line of cut, thus ensure that the surface quality of lead-covering.
Embodiment 1, the line of certain type curved surface lead-covering profile, its shape as shown in Figure 1.
1, increase technique lug line of cut and process blind pin-and-hole and alignment pin:, lead-covering profile cut line (3) upper increase by two technique lug lines of cut (4) upper in stretching fetalism face (2), in the region that each technique lug line of cut (4) is surrounded, processing a blind pin-and-hole (5); Process two alignment pins, the external diameter of alignment pin and blind pin-and-hole (5) matched in clearance;
2, composite face mold is manufactured: with the fetalism face (2) that stretches for paving mould, paving material prepreg in the region that lead-covering profile cut line (3) and technique lug line of cut (4) surround, paving thickness is 8mm, embedded with metal lining in the region that composite face mold technique lug line of cut (4) is surrounded; Then take off after normal temperature cure 48h;
3, hole: covered by composite face mold on the covering blank of stretched lead-covering profile, profile being fitted, is that drill bushing processes covering blank dowel hole with metal lining;
4, rule: first, by composite face mold, covering blank with accurately locate stretching fetalism face (2) three; Then, scriber is used on covering blank, to mark outline line as line of cut along the edge of composite face mold; When cutting curved surface lead-covering, excise two technique lugs simultaneously.
Embodiment 2, the line of certain type curved surface lead-covering profile of another kind of shape, its area is greater than the lead-covering 20% shown in embodiment 1.
1, increase technique lug line of cut and process blind pin-and-hole and alignment pin:, lead-covering profile cut line (3) upper increase by two technique lug lines of cut (4) upper in stretching fetalism face (2), in the region that each technique lug line of cut (4) is surrounded, processing a blind pin-and-hole (5); Process two alignment pins, the external diameter of alignment pin and blind pin-and-hole (5) matched in clearance;
2, composite face mold is manufactured: with the fetalism face (2) that stretches for paving mould, paving material prepreg in the region that lead-covering profile cut line (3) and technique lug line of cut (4) surround, paving thickness is 10mm, embedded with metal lining in the region that composite face mold technique lug line of cut (4) is surrounded; Then take off after normal temperature cure 50h;
3, hole: covered by composite face mold on the covering blank of stretched lead-covering profile, profile being fitted, is that drill bushing processes covering blank dowel hole with metal lining;
4, rule: first, by composite face mold, covering blank with accurately locate stretching fetalism face (2) three; Then, scriber is used on covering blank, to mark outline line as line of cut along the edge of composite face mold; When cutting curved surface lead-covering, excise two technique lugs simultaneously.
Embodiment 3, the line of the third certain type curved surface lead-covering profile, its area is greater than the lead-covering 10% shown in embodiment 2.
1, increase technique lug line of cut and process blind pin-and-hole and alignment pin:, lead-covering profile cut line (3) upper increase by two technique lug lines of cut (4) upper in stretching fetalism face (2), in the region that each technique lug line of cut (4) is surrounded, processing a blind pin-and-hole (5); Process two alignment pins, the external diameter of alignment pin and blind pin-and-hole (5) matched in clearance;
2, composite face mold is manufactured: with the fetalism face (2) that stretches for paving mould, paving material prepreg in the region that lead-covering profile cut line (3) and technique lug line of cut (4) surround, paving thickness is 12mm, embedded with metal lining in the region that composite face mold technique lug line of cut (4) is surrounded; Then take off after normal temperature cure 54h;
3, hole: covered by composite face mold on the covering blank of stretched lead-covering profile, profile being fitted, is that drill bushing processes covering blank dowel hole with metal lining;
4, rule: first, by composite face mold, covering blank with accurately locate stretching fetalism face (2) three; Then, scriber is used on covering blank, to mark outline line as line of cut along the edge of composite face mold; When cutting curved surface lead-covering, excise two technique lugs simultaneously.
Claims (1)
1. a scribble method for curved surface lead-covering profile, lead-covering outline line drawn by the covering blank of stretched lead-covering profile, and it is characterized in that, the step of line is as follows:
1.1, increase technique lug line of cut and process blind pin-and-hole and alignment pin:, lead-covering profile cut line (3) upper increase by two technique lug lines of cut (4) upper in stretching fetalism face (2), two technique lug lines of cut (4) lay respectively at the two ends of lead-covering profile cut line (3) length direction, in the region that each technique lug line of cut (4) is surrounded, process a blind pin-and-hole (5); Process two alignment pins, the external diameter of alignment pin and blind pin-and-hole (5) matched in clearance;
1.2, composite face mold is manufactured: with the fetalism face (2) that stretches for paving mould, paving material prepreg in the region that lead-covering profile cut line (3) and technique lug line of cut (4) surround, paving thickness is 8mm ~ 12mm, embedded with metal lining in the region that composite face mold technique lug line of cut (4) is surrounded, the position of metal lining is corresponding with the position of the upper blind pin-and-hole (5) in stretching fetalism face (2), and the aperture of metal lining equals the aperture of blind pin-and-hole (5); Then normal temperature cure is at least taken off after 48h;
1.3, hole: covered by composite face mold on the covering blank of stretched lead-covering profile, profile being fitted, is that drill bushing processes covering blank dowel hole with metal lining;
1.4, rule: first, covering blank is placed on stretching fetalism face (2), again composite face mold is covered on covering blank, two alignment pins are inserted respectively in the upper blind pin-and-hole (5) in the lining endoporus of composite face mold, the covering blank dowel hole of covering blank and stretching fetalism face (2), three is accurately located; Then, scriber is used on covering blank, to mark outline line as line of cut along the edge of composite face mold; When cutting curved surface lead-covering, excise two technique lugs simultaneously.
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| CN201310145486.3A CN103203735B (en) | 2013-04-24 | 2013-04-24 | A kind of scribble method of curved surface lead-covering profile |
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| CN201310145486.3A CN103203735B (en) | 2013-04-24 | 2013-04-24 | A kind of scribble method of curved surface lead-covering profile |
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| CN103203735B true CN103203735B (en) | 2015-08-26 |
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| CN103495636B (en) * | 2013-09-30 | 2015-09-02 | 中国航空工业集团公司北京航空制造工程研究所 | Reconfigurable tool is adopted to carry out the method for skinning surface and location |
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| CN112659088A (en) * | 2020-12-15 | 2021-04-16 | 西安飞机工业（集团）有限责任公司 | Sheet metal part contour marking device and marking method |
| CN113442104B (en) * | 2021-07-16 | 2023-03-14 | 中国航空工业集团公司济南特种结构研究所 | Partitioned marking device and method for surface paint spraying of cover body |
| 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 |
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