CN203830809U - Thin-skin milling device - Google Patents
Thin-skin milling device Download PDFInfo
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- CN203830809U CN203830809U CN201420165309.1U CN201420165309U CN203830809U CN 203830809 U CN203830809 U CN 203830809U CN 201420165309 U CN201420165309 U CN 201420165309U CN 203830809 U CN203830809 U CN 203830809U
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- thin skin
- milling
- profiling
- vacuum platform
- skin
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Abstract
A thin-skin milling device comprises a vacuum platform, a thin skin and a profile modeling press clamp, wherein the thin skin is arranged on the vacuum platform, the profile modeling press clamp is arranged on the thin skin, the surface area of the vacuum platform is larger than that of the profile modeling press clamp, the surface area of the profile modeling press clamp is larger than that of the thin skin, the profile modeling press clamp is a thick rectangular aluminum plate, the periphery of a surface plane of the thick aluminum plate close to the edge position is provided with a cutting-off groove matched with an external profile of the thin skin, the surface of the thick aluminum plate is provided with a sunken milling region matched with a sunken region of the thin skin, a region of the profile modeling press clamp except the cutting-off groove is provided with an external profile press region, and a region within the cutting-off groove is provided with an internal press region. The skin milling is performed by adopting the device, and a phenomenon that skin overcut and even skin scrapping suction caused by looseness and shake of a skin intermittent breaking-away vacuum platform in the milling process is effectively avoided.
Description
Technical field
The utility model relates to aviation digital control processing thin skin field, is specifically related to a kind of thin skin Grinder and applies this device the method for carrying out milling.
Background technology
At present, the digital control processing of existing aviation roll bending thin skin is all to adopt the cooperation of vacuum platform and briquetting to carry out clamping to thin skin, method is that the thin skin of roll bending is placed on vacuum platform, adopt briquetting to compress in the surrounding of thin skin, zone line relies on the vacuum pressure absorption thin skin of vacuum platform, then carries out machine and adds milling.But apply this kind of method processing thin skin in actual processing, the qualification rate of thin skin is very low, often occur that thin skin crosses the phenomenon of cutting.
If thin skin is larger, the quantity of briquetting also increases thereupon.The method has not only increased the time of manual clamping, the service time of waste lathe greatly, also exist due to the manual thrust difference and the poor shortcoming of even property that make each briquetting of compressing, cause in production application, adopt multiple thin skins that this kind of method makes to cause the situation of scrapping because thrust is inhomogeneous.Especially thin skin, is applied to very thin covering on aircraft gate or fuselage (thickness is not enough 3mm), occurs that the situation of scrapping is particularly serious, find to cause to scrap through technical staff's deep study and analysis former because:
One, because thin skin has completed roll forming before machine adds milling, form crooked radian, thin skin itself is with very large bounce-back stress, when being equivalent under the absorption and the effect of thin skin self gravitation of a standard atmospheric pressure, thin skin seems and is all attached on vacuum platform, but the gap that still has 0.023mm-0.26mm through inspection thin skin zone line, is not properly fit onto on vacuum platform.
Two, the thin skin of roll bending is flattened, reach a kind of state of strain, but itself is with very large bounce-back stress, the region of stress maximum is middle, reduce to surrounding gradually, in the time of milling thin skin zone line, cutter produces larger cutting force in thin skin Surface Contact, make vacuum platform again milling cutter cutting zone hold thin skin completely or the absorption of the intermittent instantaneous disengaging vacuum platform of thin skin in milling process, occur loosening, vibration, the phenomenon that causes thin skin to be crossed cutting, because aviation parts precision is very high, little by little cut wound just can cause part to be scrapped, therefore there is processing risk greatly.
Therefore, technical staff has done deep research to the milling process technology of thin skin again.
Utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of thin skin Grinder, this device is by effective cooperation of vacuum platform and profiling compressing fixture, solve the thin skin vacuum platform of cannot fitting completely, there is loosening, vibration in milling process, cause thin skin to be crossed cutting affecting the phenomenon that covering machining accuracy causes covering to be scrapped.
The technical scheme that the utility model adopted is for achieving the above object:
A kind of thin skin Grinder, it is characterized in that: comprise vacuum platform, thin skin, profiling compressing fixture, described thin skin is placed on described vacuum platform, described profiling compressing fixture is placed on described thin skin, the surface area of described vacuum platform is greater than the surface area of profiling compressing fixture, the surface area of described profiling compressing fixture is greater than the surface area of thin skin, described profiling compressing fixture is rectangular thick aluminium sheet, the periphery at the table plane place of keeping to the side of described thick aluminium sheet has the cut-out groove matching with described thin skin outline, the surface of described thick aluminium sheet has the sagging milling district matching with described thin skin downset areas, region on described profiling compressing fixture beyond described cut-out groove has gabarit and compresses region, region in described cut-out groove has the inner region that compresses.
Preferably, on the surface of described vacuum platform, there is the seal groove of several horizontal strokes, longitudinal direction, aspirating hole, dowel hole, described vacuum platform inside has the vacuum line being connected with vavuum pump, and described vacuum line is communicated with aspirating hole.
Preferably, between described cut-out groove, there is dowel.
Preferably, the periphery in described sagging milling district is away from the periphery 5mm of the described thin skin downset areas matching with it.
Preferably, described thin skin has auricle downset areas, and the outward flange of described cut-out groove has the auricle milling district for auricle downset areas described in milling.
Preferably, the periphery in described auricle milling district is away from the periphery 5mm of auricle downset areas.
Preferably, the neighboring of described cut-out groove has bolt hole, also has internal thread connecting hole on the surface of described vacuum platform, and described internal thread connecting hole and described bolt hole match.
Preferably, described thick aluminium sheet is 7050 aluminium alloys.
Preferably, on described thick aluminium sheet, there is sagging milling district of 20 places.
Beneficial effect:
1, the utility model thin skin Grinder adopts vacuum platform and profiling compressing fixture to cooperatively interact, roll bending is flattened completely and compress region and the inner region that compresses effectively compresses by gabarit, carry out milling by the milling district of sinking again, make the thin skin with bounce-back stress can not adsorbed by vacuum platform and become flexible, tremble, cause covering to cross and cut the situation that covering machining accuracy causes covering to be scrapped that affects because of covering part in milling process.Also effectively reduced the manual time of carrying out clamping in prior art simultaneously, reduce the service time of lathe, avoid manual compression to make the shortcoming of each briquetting thrust difference, lack of homogeneity, this device can be applicable to the covering of various gauge size, especially large covering, has saved the operation of the various briquetting of manual clamping quantity, has not only improved the machining accuracy of covering, also improved operating efficiency, this apparatus structure is simply convenient to implement.
2, on vacuum platform, be furnished with dowel hole and seal groove, contribute to determine the position of profiling compressing fixture with respect to thin skin.
3, cut off groove and be arranged to not type of attachment, between there is dowel, effectively avoided covering in milling process because clamping force flicks not.
4, profiling compressing fixture is provided with auricle milling district, and the covering that makes to process has auricle and sink, the positioning datum while being convenient to lifting, assembling covering.
5, the box auricle milling district of sagging milling district of profiling compressing fixture be provided with 5mm away from covering on actual downset areas and auricle downset areas, wherein 5mm distance, for keeping away cutter distance, can shoot the arrow at the target milling cutter.
6, the bogging down area on profiling compressing fixture can process according to the actual needs of covering.
7, apply this device and carry out milling, simple, having overcome covering discharges and the inhomogeneous difficult point of vacuum platform absorption affinity in milling process local stress, improve skin shape precision, working (machining) efficiency, make the transformation of covering qualification rate from 50% to 99.99%, save covering processing cost, bad student considerable economic benefit.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the utility model thin skin Grinder.
Fig. 2 is the three-dimensional exemplary plot of profiling compressing fixture in the utility model thin skin Grinder.
Fig. 3 is the front view of profiling compressing fixture in Fig. 2 example shown figure.
Wherein,
1-bolt hole, 2-dowel, 3-cuts off groove, the sagging milling of 4-district, 5-auricle milling district, 6-gabarit compresses region, inner region, 8-vacuum platform, the 9-thin skin of compressing of 7-.
Detailed description of the invention
A thin skin Grinder as Figure 1-3, comprises vacuum platform 8, the profiling compressing fixture shown in Fig. 2-3, thin skin 9.Thin skin 9 is placed on vacuum platform 8, profiling compressing fixture is placed on thin skin 9, the surface area of vacuum platform 8 is greater than the surface area of profiling compressing fixture, the surface area of profiling compressing fixture is greater than the surface area of thin skin 9, profiling compressing fixture is rectangular thick aluminium sheet, the periphery at the table plane place of keeping to the side of thick aluminium sheet has the cut-out groove 3 matching with thin skin 9 outlines, the surface of thick aluminium sheet has the sagging milling district 4 matching with thin skin 9 downset areas, on profiling compressing fixture, there is gabarit compression region 6 in the region cutting off beyond 3, there is the inner region 7 that compresses in the region cutting off in groove 3.
On the surface of vacuum platform 8, there is the seal groove of several transverse and longitudinal directions, aspirating hole, dowel hole, internal thread connecting hole, vacuum platform 8 inside have the vacuum line being connected with vavuum pump, the place's of keeping to the side there is one week unconnected cut-out groove 3 each other on profiling compressing fixture, cutting off between groove 3 (not junction) is dowel 2, the neighboring that cuts off groove has bolt hole 1, internal thread connecting hole on the size of bolt hole 1 and vacuum platform 8 matches, and the outward flange that cuts off groove 3 has the auricle milling district 5 matching with thin skin auricle downset areas.The periphery in sagging milling district 4, auricle milling district 5 is all away from the thin skin downset areas matching with it, auricle downset areas periphery 5mm.On profiling compressing fixture, there is sagging milling district of 20 places 4.
Preferably, profiling compressing fixture adopts 7050 aluminium alloys.
Preferably, be the long thin skin of wide 1000mm*500mm to 3000mm*1100mm of taking advantage of for milling model in actual applications, adopt the structure of profiling compressing fixture and be of a size of, the wide * height of the long * of contour dimension of profiling compressing fixture is 2120mm*980mm*22mm; Bolt hole 1 is positioned on two widths of profiling compressing fixture, is provided with 3 bolts hole 1, and spacing is 410mm; Auricle milling district 5 is positioned on the length direction of profiling compressing fixture, and spacing is 974mm; On profiling compressing fixture, have sagging milling district of 20 places 4, the groove width of cutting off groove 3 is 13mm, is provided with 8 place's dowels 2, and the length of dowel 2 is 25mm.
The method that adopts the utility model thin skin Grinder to carry out milling is:
(1) thin skin 9 of roll bending is placed on vacuum platform 8, distribute thin skin 9 one end are compressed by the seal groove of vacuum platform 8, then roll to other direction gradually, thin skin 9 is attached on vacuum platform, opens vavuum pump and vacuumize thin skin 9 adsorbed close on vacuum platform 8;
(2) profiling compressing fixture is placed on thin skin 9, pass through alignment pin, find the position of profiling compressing fixture with respect to thin skin 9 accurately, be bolted profiling compressing fixture, the additional auxiliary pressing plate in edge on the length direction of profiling compressing fixture compresses this profiling compressing fixture;
(3) utilize milling cutter first to carry out milling in the sagging milling district 4 of profiling compressing fixture, milling goes out thin skin 9 downset areas, secondly carries out milling in auricle milling district 5, and milling goes out thin skin 9 auricle bogging down areas, finally carrying out milling to cutting off groove 3, by the gabarit milling of thin skin 9 out;
(4) remove auxiliary pressing plate, remove profiling compressing fixture, discharge thin skin, finally dowel 2 is processed.
Thin skin Grinder of the present utility model and the method for applying this device and carrying out milling, thoroughly solve the intermittence instantaneous vibration that occurs when digital control milling roll bending thin skin sink, loosening, cause covering to be crossed and cut the phenomenon that causes covering to be scrapped, make the milling qualification rate of covering be promoted to 99.99% from 50%, not only save processing cost, also improved skin shape precision and milling working (machining) efficiency, similarly covering milling all can adopt Grinder of the present utility model.
Although illustrated and described embodiment of the present utility model and method, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present utility model and aim, can carry out multiple variation, amendment, replacement and modification to this embodiment and method, therefore scope of the present utility model is limited by claim and equivalent thereof.
Claims (9)
1. a thin skin Grinder, it is characterized in that: comprise vacuum platform, thin skin, profiling compressing fixture, described thin skin is placed on described vacuum platform, described profiling compressing fixture is placed on described thin skin, the surface area of described vacuum platform is greater than the surface area of profiling compressing fixture, the surface area of described profiling compressing fixture is greater than the surface area of thin skin, described profiling compressing fixture is rectangular thick aluminium sheet, the periphery at the table plane place of keeping to the side of described thick aluminium sheet has the cut-out groove matching with described thin skin outline, the surface of described thick aluminium sheet has the sagging milling district matching with described thin skin downset areas, region on described profiling compressing fixture beyond described cut-out groove has gabarit and compresses region, region in described cut-out groove has the inner region that compresses.
2. thin skin Grinder according to claim 1, it is characterized in that: the seal groove on the surface of described vacuum platform with several horizontal strokes, longitudinal direction, aspirating hole, dowel hole, described vacuum platform inside has the vacuum line being connected with vavuum pump, and described vacuum line is communicated with aspirating hole.
3. thin skin Grinder according to claim 1, is characterized in that: between described cut-out groove, have dowel.
4. thin skin Grinder according to claim 1, is characterized in that: the periphery in described sagging milling district is away from the periphery 5mm of the described thin skin downset areas matching with it.
5. thin skin Grinder according to claim 1, is characterized in that: described thin skin has auricle downset areas, and the outward flange of described cut-out groove has the auricle milling district for auricle downset areas described in milling.
6. thin skin Grinder according to claim 5, is characterized in that: the periphery in described auricle milling district is away from the periphery 5mm of auricle downset areas.
7. thin skin Grinder according to claim 1, is characterized in that: the neighboring of described cut-out groove has bolt hole, also has internal thread connecting hole on the surface of described vacuum platform, and described internal thread connecting hole and described bolt hole match.
8. according to the arbitrary described thin skin Grinder of claim 1-7, it is characterized in that: described thick aluminium sheet is 7050 aluminium alloys.
9. according to the arbitrary described thin skin Grinder of claim 1-7, it is characterized in that: on described thick aluminium sheet, there is sagging milling district of 20 places.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420165309.1U CN203830809U (en) | 2014-04-04 | 2014-04-04 | Thin-skin milling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420165309.1U CN203830809U (en) | 2014-04-04 | 2014-04-04 | Thin-skin milling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203830809U true CN203830809U (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420165309.1U Withdrawn - After Issue CN203830809U (en) | 2014-04-04 | 2014-04-04 | Thin-skin milling device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203830809U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920915A (en) * | 2014-04-04 | 2014-07-16 | 中航沈飞民用飞机有限责任公司 | Thin skin milling device and method for milling by utilizing device |
| CN104625574A (en) * | 2015-01-07 | 2015-05-20 | 哈尔滨飞机工业集团有限责任公司 | Method for cutting off technology compressing platforms of aluminium alloy box-shaped structural component |
| CN104999122A (en) * | 2015-07-27 | 2015-10-28 | 西北工业大学 | Automatic high-precision edge milling device and method for aircraft skin |
| CN107442824A (en) * | 2017-07-31 | 2017-12-08 | 成都飞机工业（集团）有限责任公司 | A kind of titanium alloy thin wall one side frame class part vacuum suction numerical-control processing method |
-
2014
- 2014-04-04 CN CN201420165309.1U patent/CN203830809U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920915A (en) * | 2014-04-04 | 2014-07-16 | 中航沈飞民用飞机有限责任公司 | Thin skin milling device and method for milling by utilizing device |
| CN104625574A (en) * | 2015-01-07 | 2015-05-20 | 哈尔滨飞机工业集团有限责任公司 | Method for cutting off technology compressing platforms of aluminium alloy box-shaped structural component |
| CN104999122A (en) * | 2015-07-27 | 2015-10-28 | 西北工业大学 | Automatic high-precision edge milling device and method for aircraft skin |
| CN107442824A (en) * | 2017-07-31 | 2017-12-08 | 成都飞机工业（集团）有限责任公司 | A kind of titanium alloy thin wall one side frame class part vacuum suction numerical-control processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140917 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |