CN110682124A - Milling fixture for fine cutting of large-scale double-curvature aircraft skin - Google Patents
Milling fixture for fine cutting of large-scale double-curvature aircraft skin Download PDFInfo
- Publication number
- CN110682124A CN110682124A CN201910868187.XA CN201910868187A CN110682124A CN 110682124 A CN110682124 A CN 110682124A CN 201910868187 A CN201910868187 A CN 201910868187A CN 110682124 A CN110682124 A CN 110682124A
- Authority
- CN
- China
- Prior art keywords
- positioning
- aircraft skin
- clamping plate
- component
- auxiliary clamping
- Prior art date
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 20
- 239000003570 air Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 9
- 229910000838 Al alloys Inorganic materials 0.000 claims description 8
- 239000000463 materials Substances 0.000 claims description 6
- 230000000576 supplementary Effects 0.000 abstract description 7
- 238000006073 displacement reactions Methods 0.000 abstract 1
- 210000003491 Skin Anatomy 0.000 description 12
- 230000000875 corresponding Effects 0.000 description 5
- 238000009966 trimming Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 238000010521 absorption reactions Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering processes Methods 0.000 description 2
- 238000000034 methods Methods 0.000 description 2
- 239000000203 mixtures Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/065—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding workpieces being specially deformable, e.g. made from thin-walled or elastic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/10—Manufacturing or assembling aircraft, e.g. jigs therefor
Abstract
Description
Technical Field
The invention belongs to technical equipment for machining, and relates to a milling fixture for fine cutting of large-scale double-curvature aircraft skin.
Background
At present, the problems that the processing technology is difficult, the manufacturability is complex, the edge cutting is carried out manually and the like generally exist in the skin of a large double-curvature airplane. When manual trimming is carried out on the skin of a large-scale double-curvature aircraft, the error of the manual trimming is usually large, a mode of allowance-remaining assembly filing is adopted in the aircraft assembly process, a large amount of filing work needs to be carried out, allowance-free assembly riveting cannot be realized at all, and therefore the production progress of the aircraft is seriously influenced, and therefore the processing technology of the existing skin needs to be redefined and designed.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a milling fixture for fine cutting of a large double-curvature aircraft skin, so as to meet the requirement of allowance-free processing of large double-curvature aircraft skin parts and improve the production efficiency.
The above object of the present invention is achieved by the following technical solutions:
a milling fixture for fine cutting of large-scale double-curvature aircraft skin comprises a positioning adsorption component, an auxiliary clamping plate positioning component and a basic platform, wherein the molded surface of the positioning and adsorbing component is consistent with the molded surface of the aircraft skin, an air exhaust groove is arranged on the molded surface of the positioning and adsorbing component, the positioning and adsorbing component is fixed on the basic platform after being provided with a sealing strip, the auxiliary clamping plate positioning component comprises an auxiliary clamping plate and a positioning seat, wherein the positioning seat is positioned at the inner side of the positioning adsorption component and fixed on the basic platform, the auxiliary clamping plate is fixed on the positioning seat, thereby connecting between the positioning adsorption components, the positioning adsorption components and the auxiliary clamping plate are jointed with the aircraft skin together for keeping the appearance of the aircraft skin, the basic platform is provided with a joint connected with a vacuum pump, the vacuum pumping device is used for vacuumizing a cavity formed by the aircraft skin, the positioning adsorption component, the auxiliary clamping plate and the basic platform.
The positioning and adsorbing assembly is composed of a plurality of modularized positioning and adsorbing modules, so that the airplane skin can be quickly clamped and positioned and the cost is reduced through different combinations of the positioning and adsorbing modules aiming at the common airplane skin molded surface.
The milling fixture disclosed by the invention is used for realizing the compaction of the skin and the milling fixture by adopting full vacuum adsorption, is not easy to shift so as to ensure the precision cutting quality, can realize allowance-free precision shape cutting, can realize electromechanical integration by matching with a five-axis numerical control machine tool, and is suitable for the precision shape cutting of various large skins.
Drawings
FIG. 1 is a top view of an aircraft skin part in an embodiment;
FIG. 2 is a front view of the aircraft skin component of FIG. 1;
FIG. 3 is a top view of the milling fixture of the present invention;
FIG. 4 is a front view of the milling fixture after placement and compression of the aircraft skin part of FIG. 1;
fig. 5 is a sectional view taken along line a-a in fig. 4.
The aircraft comprises 1-an aircraft skin part, 2-a positioning adsorption module, 3-an auxiliary clamping plate, 4-a sealing strip, 5-a quick-change connector, 6-a set screw, 7-a basic platform and 8-a positioning seat.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
For a clearer understanding of the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
FIG. 1 is a top view of an aircraft skin part in an embodiment; fig. 2 is a front view of the aircraft skin component of fig. 1. As shown in the figure, the aircraft skin part is a large double-curvature aircraft skin, and all opening parts need to be precisely cut. At present, the edge cutting is carried out manually, however, when the manual edge cutting is carried out on the skin of a large-scale double-curvature aircraft, the error of the manual edge cutting is usually large, the mode of assembling and filing with allowance is adopted in the aircraft assembling process, a large amount of filing work is needed, and the assembly riveting without allowance can not be realized at all, so that the production progress of the aircraft is seriously influenced.
Therefore, the invention provides a milling fixture for fine cutting of a large-scale double-curvature aircraft skin. FIG. 3 is a top view of the milling fixture of the present invention; FIG. 4 is a front view of the milling fixture after placement and compression of the aircraft skin part of FIG. 1; and fig. 5 is a sectional view taken along line a-a of fig. 4. As shown in the figure, the milling fixture for finely cutting the large double-curvature aircraft skin comprises a positioning and adsorbing component 2, an auxiliary clamping plate positioning component and a basic platform 7, wherein the positioning and adsorbing component is arranged at a corresponding position according to a part to be accurately cut of a corresponding aircraft skin part 1, and the molded surface is consistent with the molded surface of the corresponding aircraft skin part 1 in a fitting manner. For example, the portion to be precisely cut of the aircraft skin part shown in fig. 1 includes the outer edge of the aircraft skin part with the notch a and the rectangular portion B indicated in the center of the aircraft skin part shown in fig. 1, and since both the left and right sides are straight edges, cutting may be performed in advance so that the arrangement of the positioning suction assembly, as shown in fig. 3, corresponds to the portion to be precisely cut of the aircraft skin part 1. Be provided with the groove of taking out air on the profile of location adsorption component 2, fix on basic platform 7 after location adsorption component 2 installation sealing strip 4, for example, can adopt tacking screw 6 to fix on basic platform 7.
Supplementary cardboard locating component includes supplementary cardboard 3 and positioning seat 8, and wherein positioning seat 8 is inboard at location adsorption component 2, fixes on basic platform 7, and supplementary cardboard 3 is fixed on positioning seat 8 to connect between location adsorption component 2, location adsorption component 2 and supplementary cardboard 3 laminate with aircraft skin part 1 together, are used for fixing a position aircraft skin part 1's appearance. The basic platform is provided with a quick-change connector 5 connected with a vacuum pump, and the quick-change connector is used for vacuumizing an aircraft skin part 1, a positioning adsorption component 2, an auxiliary clamping plate 3, a basic platform 7 and a cavity formed by sealing strips, which are placed on the positioning adsorption component and the auxiliary clamping plate, and an air-pumping groove on a molded surface of the positioning adsorption component 2 communicated with the cavity, so that the aircraft skin part 1 can be fastened on the milling fixture of the invention by utilizing a negative pressure principle generated by the vacuumized atmosphere, then the aircraft skin part 1 can be milled at a high speed, the outer contour error of the aircraft skin part can be controlled within +/-0.05 mm, and the problem of no-allowance assembly of the aircraft skin part can be solved.
In addition, the positioning and adsorbing assembly 2 can be composed of a plurality of modularized positioning and adsorbing modules, so that the airplane skin can be quickly clamped and positioned by different combinations of the positioning and adsorbing modules aiming at the common airplane skin molded surface, and the cost is reduced. For example, for the aircraft skin part 1 shown in fig. 1, the positioning and adsorbing assembly 2 may be composed of a straight-edge positioning and adsorbing module, a positioning and adsorbing module corresponding to the rectangular portion B in the center of the aircraft skin part 1, and a positioning and adsorbing module corresponding to the notch a.
Although various suitable materials can be used, the material for positioning the adsorption member 2 is preferably an aluminum alloy, and more preferably 6061-T651 aluminum alloy, which is excellent in workability, high in toughness, and does not deform after processing, and is easily polished, in view of cost, weight, and the like. In the embodiment, the size of the air-extracting groove on the molded surface of the positioning adsorption component 2 is set to be 6mm wide and 5.5mm deep, which can be adjusted according to the specific situation, and in addition, the precision of the molded surface is +/-0.02 mm. The sealing strip 4 can adopt a phi 6 hollow rubber sealing strip.
The quick-change connector 5 arranged on the basic platform 7 can be any connector capable of being connected with a vacuum pump, the connection and the disassembly are convenient, and the vacuum degree after the vacuum pumping is not lower than 0.08 MPa.
The positioning seat 8 which is positioned at the inner side of the positioning adsorption component 2 and fixed on the base platform 7 can be made of No. 45 steel, the hardness after heat treatment is HRC 35-40, and the precision of the positioning surface is +/-0.02 mm. Similar to the positioning and adsorbing component 2, the auxiliary clamping plate 3 is preferably made of aluminum alloy, and more preferably made of 6061-T651 aluminum alloy, the profile precision of the auxiliary clamping plate is +/-0.02 mm, and the auxiliary clamping plate and the positioning and adsorbing component 2 are used for positioning the appearance of the aircraft skin part 1.
When the milling clamp is used, firstly, the positioning absorption component 2 is provided with the sealing strip 4, then the sealing strip is connected to the base platform 7 through the set screw 6, then the positioning seat 8 is arranged on the inner side of the positioning absorption component 2 and is fixed on the base platform 7, and then the auxiliary clamping plate 3 is fixed on the positioning seat 8. The aircraft skin part 1 is then placed on the positioning suction assembly 2 and the auxiliary card 3. And connecting the quick-change connector 5 on the basic platform 7 with a vacuum pump, and vacuumizing the formed cavity, wherein the vacuum degree is not lower than 0.08MPa, so that the aircraft skin part 1 is tightly adsorbed on the positioning adsorption component 2. After the aircraft skin part is positioned, a five-axis numerical control machine tool is started, and after the cutter is positioned through a positioning hole in the aircraft skin part 1, the aircraft skin part 1 is subjected to accurate trimming according to a numerical control program. And after finishing the accurate trimming work of the aircraft skin part, closing the vacuum pump, and taking out the aircraft skin part 1 with accurate trimming from the positioning adsorption module 2.
The milling fixture for precisely cutting the skin of the large-scale double-curvature aircraft can meet the requirement of no-allowance processing of large-scale skin parts, reduces the cost investment of the tool, saves the placing space of the tool, shortens the development period of the tool, improves the total production efficiency, and has great practical application and popularization values.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910868187.XA CN110682124A (en) | 2019-09-12 | 2019-09-12 | Milling fixture for fine cutting of large-scale double-curvature aircraft skin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910868187.XA CN110682124A (en) | 2019-09-12 | 2019-09-12 | Milling fixture for fine cutting of large-scale double-curvature aircraft skin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110682124A true CN110682124A (en) | 2020-01-14 |
Family
ID=69109111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910868187.XA CN110682124A (en) | 2019-09-12 | 2019-09-12 | Milling fixture for fine cutting of large-scale double-curvature aircraft skin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110682124A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090322008A1 (en) * | 2005-05-20 | 2009-12-31 | The Boeing Company | Reconfigurable Workpiece Support Fixture |
| CN101738154A (en) * | 2010-01-21 | 2010-06-16 | 西北工业大学 | Flexible detection device for aircraft skin |
| CN103639797A (en) * | 2013-11-28 | 2014-03-19 | 江西洪都航空工业集团有限责任公司 | Double-curvature profile surface vacuum absorption platform and method for machining thickness of double-curvature skin |
| CN109774194A (en) * | 2019-03-29 | 2019-05-21 | 四川省新万兴碳纤维复合材料有限公司 | A kind of integrally formed tooling of composite material fuselage covering and its moulding process |
-
2019
- 2019-09-12 CN CN201910868187.XA patent/CN110682124A/en active Search and Examination
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090322008A1 (en) * | 2005-05-20 | 2009-12-31 | The Boeing Company | Reconfigurable Workpiece Support Fixture |
| CN101738154A (en) * | 2010-01-21 | 2010-06-16 | 西北工业大学 | Flexible detection device for aircraft skin |
| CN103639797A (en) * | 2013-11-28 | 2014-03-19 | 江西洪都航空工业集团有限责任公司 | Double-curvature profile surface vacuum absorption platform and method for machining thickness of double-curvature skin |
| CN109774194A (en) * | 2019-03-29 | 2019-05-21 | 四川省新万兴碳纤维复合材料有限公司 | A kind of integrally formed tooling of composite material fuselage covering and its moulding process |
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