CN105382312A - Finish machining weight control method for two-sided thin-wall numerical control milling machine workpiece - Google Patents
Finish machining weight control method for two-sided thin-wall numerical control milling machine workpiece Download PDFInfo
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- CN105382312A CN105382312A CN201510845526.4A CN201510845526A CN105382312A CN 105382312 A CN105382312 A CN 105382312A CN 201510845526 A CN201510845526 A CN 201510845526A CN 105382312 A CN105382312 A CN 105382312A
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- sided thin
- walled
- milling part
- number milling
- control method
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Classifications
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- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2215/00—Details of workpieces
- B23C2215/04—Aircraft components
Abstract
The invention provides a finish machining weight control method for a two-sided thin-wall numerical control milling machine workpiece, and relates to the field of weight engineering of overall design of planes. The finish machining weight control method is used for design of the two-sided thin-wall numerical control milling machine workpiece and weight control in the machining process and includes the steps that S1, the thickness of the two-sided thin-wall numerical control milling machine workpiece is designed as a thickness having symmetry tolerance with a design value; S2, a design model of the two-sided thin-wall numerical control milling machine workpiece is accurately controlled; S3, optimization design is carried out on the structural stability of the two-sided thin-wall numerical control milling machine workpiece; S4, in the machining process of the two-sided thin-wall numerical control milling machine workpiece, a base material is fixed to a tool; and S5, the base material is machined, and the machining size is measured and corrected in the machining process. According to the finish machining weight control method for the two-sided thin-wall numerical control milling machine workpiece, the two-sided thin-wall numerical control milling machine workpiece is designed and machined, the machining accuracy of a large two-sided thin-wall-structure part can be largely improved, and the weight reducing effect of the two-sided thin-wall numerical control milling machine workpiece in the machining process is improved.
Description
Technical field
The present invention relates to weight engineering field in preliminary design of aircraft, in particular to one two-sided thin-walled number milling part fine finishining weight control method.
Background technology
The mechanical processing technique of airplane parts is the important component part of aircraft manufacturing technology, along with the extensive use with Computerized Numerical Control processing technology that improves constantly of aircraft technology performance, the quantity of machined part is being on the increase, especially integral structure component increases more remarkable, wherein, integral panel, owing to decreasing the quantity of part and connector, simplifies rapport, decrease assembly work amount, number of applications aboard gets more and more.
Integral panel comprises web, rib, connecting hole and periphery and strengthens boss, there is the integral panel of large contour dimension, thin web plate, double-side type cavity configuration, because metal removal rate is large, Numerical Control Processing Working Procedure is concentrated, because it is two-sided thin-wall part structure, add and easily cause unstability and distortion man-hour, difficulty of processing is comparatively large, realizes the processing of such part high-precision and there is larger difficulty.
Therefore, when processing such part, the psychological condition that people always exist " the large insurance of size; the little danger of size ", the size of the part of processing often major part is positioned at the overgauge part of the margin of tolerance, part, close to the upper poor limit, directly causes two-sided thin-walled number milling part weight seriously overweight.
The technical problem needing now solution badly how to design a kind of two-sided thin-walled number milling part fine finishining weight control method.
Summary of the invention
The object of the invention is to solve above-mentioned deficiency of the prior art, a kind of two-sided thin-walled number milling part fine finishining weight control method is provided.
Object of the present invention is achieved through the following technical solutions: a kind of two-sided thin-walled number milling part fine finishining weight control method, for the Weight control in the design of two-sided thin-walled number milling part, process, it is characterized in that, comprises the steps,
In the described two-sided thin-walled number milling part process of design:
S1, is designed to the thickness with design load with symmetric tolerance to the thickness of two-sided thin-walled number milling part;
S2, accurately controls designing a model of described two-sided thin-walled number milling part;
S3, is optimized design to described two-sided thin-walled number milling part structural stability;
In the described two-sided thin-walled number milling part process of processing:
S4, is fixed on mother metal in frock;
S5, processes mother metal, measures and revise in process to processing dimension.
In such scheme preferably, accurately control to comprise to carry out Accurate Model to the angle residual fraction that closes of described two-sided thin-walled number milling part to designing a model of described two-sided thin-walled number milling part in S2.
In above-mentioned either a program preferably, in S3, the mode of optimal design comprises the version of rib on the quantity of rib on adjustment web, the position adjusting rib on web and adjustment web.
In above-mentioned either a program preferably, in S4, mother metal is fixed on the two-sided thin-walled number milling part model after optimizing in mode in frock and S3 and matches.
In above-mentioned either a program preferably, the mother metal mode be fixed in frock comprises vacuum suction, the auxiliary pressing plate of edge increase, on rib, increases supplemental support.
In above-mentioned either a program preferably, the mother metal mode be fixed in frock comprises vacuum suction, edge increases auxiliary pressing plate, on rib, increase the combination of at least two kinds of modes in supplemental support.
The beneficial effect of two-sided thin-walled number milling part fine finishining weight control method provided by the present invention is, two-sided thin-walled number milling part fine finishining weight control method provided by the present invention is adopted to process two-sided thin-walled number milling part, significantly improve the machining accuracy of the two-sided thin-wall construction part of large scale, two-sided thin-walled number milling part weight loss effect is remarkable, both saved raw-material cost, the precision of two-sided thin-walled number milling part can have been ensured again.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the preferred embodiment according to two-sided thin-walled number milling part fine finishining weight control method of the present invention;
Detailed description of the invention
In order to understand the two-sided thin-walled number milling part fine finishining weight control method according to the present invention program better, be further elaborated explanation below in conjunction with the preferred embodiment of accompanying drawing to two-sided thin-walled number milling part fine finishining weight control method of the present invention.
As shown in Figure 1, two-sided thin-walled number milling part fine finishining weight control method provided by the invention is used for the Weight control in the design of two-sided thin-walled number milling part, process, comprises the steps,
In the described two-sided thin-walled number milling part process of design:
S1, is designed to the thickness with design load with symmetric tolerance to the thickness of two-sided thin-walled number milling part; S2, accurately controls designing a model of described two-sided thin-walled number milling part; S3, is optimized design to described two-sided thin-walled number milling part structural stability;
In the described two-sided thin-walled number milling part process of processing:
S4, is fixed on mother metal in frock; S5, processes mother metal, measures and revise in process to processing dimension.
In the S1-S5 of the two-sided thin-walled number milling part fine finishining weight control method provided in the invention described above, accurately control to comprise to carry out Accurate Model to the angle residual fraction that closes of described two-sided thin-walled number milling part to designing a model of described two-sided thin-walled number milling part in S2; In S3, the mode of optimal design comprises the version of rib on the quantity of rib on adjustment web, the position adjusting rib on web and adjustment web; The mode that in S4, mother metal is fixed in frock is determined according to the two-sided thin-walled number milling part model after optimization in S3; The mother metal mode be fixed in frock comprises vacuum suction, edge increases auxiliary pressing plate, on rib, increases supplemental support.
Two-sided thin-walled number milling part fine finishining weight control method involved in the present invention is applied in two-sided thin-walled number milling part fine finishining Weight control, in two-sided thin-walled number milling part fine finishining Weight control process, mainly comprise the following aspects:
1. dimensional tolerance controls
The dimensional tolerance distribution of two-sided thin-walled number milling part has a significant impact pts wt, and when Element Design, trying one's best dimensional tolerance design is symmetric tolerance, and selects narrower tolerance zone as far as possible.If asymmetric tolerance range must be selected, plus tolerance part should be compressed as far as possible.Firmly stop the phenomenon that dimensional tolerance only has plus tolerance.
2. the quality that designs a model accurately controls
In numerical control part design process, must the strict designing quality controlling threedimensional model, actual processing technology should be taken into full account, partly Accurate Model is carried out to residual grade the in angle of closing that can not process, make Theoretical Design state and reality can machining state consistent.
3. structural stability design monitoring is optimized
In the design process, calculate, analyze the structural stability of part, by modified node method form, optimize the structural stability improving two-sided thin-walled number milling part, to improve the machining accuracy of part in process.
4. strengthen process structural stability
Select suitable part fixed form or various ways combining form, be fixed on by blank in frock, main purpose is the structural stability strengthening part in process.The mode strengthening process structural stability mainly comprises following several mode: the stability of part when (1) selects suitable fixture to improve machining, and integral wall plate parts is employing vacuum adsorption type fixed form as far as possible; (2) auxiliary pressing plate is increased at the blank edge of part; (3) for the poor part of segmental stability, suitably supplemental support is increased according to design of part feature.
5. Dimension Measurement controls
Measure accessory size in real time in part process, adjust the depth of cut in time, particular content is as follows: (1) keeps part to be processed stationary state in frock, measures accessory size in real time, strengthens monitoring; (2) the comprehensive dimensional measurement to part should be ensured when measuring, be of a size of 50mm × 50mm region and should have a dimensional measurement point at least; (3), when measuring, if Dimension Measurement does not meet the demands, should the depth of cut be adjusted, carry out supplementary processing, until can pull down from frock after meeting the demands.
For the process of the outer panel of aircraft, further explanation is set forth to two-sided thin-walled number milling part fine finishining weight control method of the present invention.The outer panel appearance and size of aircraft is: 4300mm × 1200mm × 100mm, and web thickness design load is 2mm, and dimensional tolerance is ± 0.25mm and (0 ~ 0.5mm) two kinds.Part theoretical weight 54.19kg, the part actual weight that weight control method is in the prior art produced is 58.55kg, overweight more, does not meet the demands.The outer panel of the aircraft produced after adopting two-sided thin-walled number milling part fine finishining weight control method provided by the invention to carry out Weight control to the outer panel of aircraft in design, process has loss of weight by a relatively large margin, it is produced the weight drawn and conforms to design designing requirement, meets design requirement.
The outer panel parts character of the above-mentioned aircraft adopting weight control method of the prior art to produce and the overweight analysis of causes:
A) large scale, thin web plate, the machine-made spares of thin-wall construction, structural stability is poor, and difficulty of processing is large;
B) because machining accuracy can not be guaranteed, actual adding, processes according to the dimensional tolerance upper limit man-hour.
Two-sided thin-walled number milling part fine finishining weight control method provided by the invention is adopted the outer panel of above-mentioned aircraft to be carried out to the Weight control of process.Design phase at the outer panel of above-mentioned aircraft: (1) adjust size tolerance.Adjustment accessory size tolerance range, cancels the former tolerance range only having plus tolerance, and compresses symmetric tolerance, accessory size tolerance is adjusted to ± 0.2mm.(2) outer panel model quality accurately controls.Strengthen the control to the modeling accuracy of part model, carry out supplementary modeling to closing angle residual fraction, theoretical model and actual processing technology state are consistent.(3) design of part optimizing stability.Analyze design of part stability, design is optimized to the position of part reinforcement and form.(4) structural stability in man-hour is added.Because this inside parts vallecular cavity reinforcement height differs, effective support can not be provided time fixing, therefore, increase supplemental support at reinforcement height compared with on the crosspoint of lower part.(5) accessory size control in man-hour is added.A, carry out dimensional measurement under the stationary state of part in frock; B, thickness measure is carried out to every 50mm × 50mm scope of outer panel part; C, in part process, in real time measure outer panel part size everywhere; D, outer panel accessory size control by size nominal value, carry out supplementary processing, until the rear that meets the demands is pulled down from frock to the size region that do not meet design requirement.
Compare for convenience, employing commonsense method processing parts is numbered part-1, the dash number adopting the processing of fine finishining loss of weight Process is part-2, and part-2 is part-1 loss of weight 3.29kg comparatively, Be very effective.Two pts wt contrast situations refer to table 1.
Table 1 machine adds part weight contrast information slip
Provided by the invention two-sided thin-walled number milling part fine finishining weight control method is adopted to carry out Weight control to aircraft outer panel in design, process segment by above-mentioned, weight control method more of the prior art is compared, and significantly improves the machining accuracy of the outer panel of the two-sided thin-walled of above-mentioned aircraft.Under the above-mentioned aircraft outer panel performance of guarantee meets the requirements of precondition, two-sided thin-walled number milling part fine finishining weight control method provided by the invention is adopted to carry out Weight control in the design of above-mentioned aircraft outer panel, process segment, the part comparatively adopting other processes to process is compared, weight loss effect is remarkable, makes the weight of the outer panel of production phase gained aircraft and the weight of design phase almost without residual quantity.
More than be described in detail in conjunction with two-sided thin-walled number milling part fine finishining weight control method specific embodiment of the present invention, but be not limitation of the present invention, everyly according to technical spirit of the present invention, technical scope of the present invention is all belonged to any simple modification made for any of the above embodiments, also it should be noted that, comprise any combination between each part mentioned above according to the category of two-sided thin-walled number milling part fine finishining weight control method technical scheme of the present invention.
Claims (6)
1. a two-sided thin-walled number milling part fine finishining weight control method, for the Weight control in the design of two-sided thin-walled number milling part, process, is characterized in that, comprise the steps, in the described two-sided thin-walled number milling part process of design:
S1, is designed to the thickness with design load with symmetric tolerance to the thickness of two-sided thin-walled number milling part;
S2, accurately controls designing a model of described two-sided thin-walled number milling part;
S3, is optimized design to described two-sided thin-walled number milling part structural stability;
In the described two-sided thin-walled number milling part process of processing:
S4, is fixed on mother metal in frock;
S5, processes mother metal, measures and revise in process to processing dimension.
2. two-sided thin-walled number milling part fine finishining weight control method as claimed in claim 1, it is characterized in that, accurately control to comprise to carry out Accurate Model to the angle residual fraction that closes of described two-sided thin-walled number milling part to designing a model of described two-sided thin-walled number milling part in S2.
3. two-sided thin-walled number milling part fine finishining weight control method as claimed in claim 1, is characterized in that, in S3, the mode of optimal design comprises the version of rib on the quantity of rib on adjustment web, the position adjusting rib on web and adjustment web.
4. two-sided thin-walled number milling part fine finishining weight control method as claimed in claim 1, is characterized in that, in S4, mother metal is fixed on the two-sided thin-walled number milling part model after optimizing in mode in frock and S3 and matches.
5. two-sided thin-walled number milling part fine finishining weight control method as claimed in claim 4, is characterized in that, the mother metal mode be fixed in frock comprises vacuum suction, edge increases auxiliary pressing plate, on rib, increases supplemental support.
6. two-sided thin-walled number milling part fine finishining weight control method as claimed in claim 4, it is characterized in that, the mother metal mode be fixed in frock comprises vacuum suction, edge increases auxiliary pressing plate, on rib, increase the combination of at least two kinds of modes in supplemental support.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510845526.4A CN105382312A (en) | 2015-11-26 | 2015-11-26 | Finish machining weight control method for two-sided thin-wall numerical control milling machine workpiece |
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| CN201510845526.4A CN105382312A (en) | 2015-11-26 | 2015-11-26 | Finish machining weight control method for two-sided thin-wall numerical control milling machine workpiece |
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| CN106270681A (en) * | 2016-10-17 | 2017-01-04 | 珠海杰赛科技有限公司 | A kind of processing method on abnormity elongate configuration plate milling limit |
| CN107442823A (en) * | 2017-06-23 | 2017-12-08 | 成都飞机工业（集团）有限责任公司 | A kind of high-rate wireless LAN method of large span vallecular cavity |
| CN107577863A (en) * | 2017-08-31 | 2018-01-12 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of part actual weight computational methods based on CATIA |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270681A (en) * | 2016-10-17 | 2017-01-04 | 珠海杰赛科技有限公司 | A kind of processing method on abnormity elongate configuration plate milling limit |
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| CN113441765A (en) * | 2021-06-25 | 2021-09-28 | 成都飞机工业（集团）有限责任公司 | Milling method of double-sided frame type part |
| CN113441765B (en) * | 2021-06-25 | 2022-06-14 | 成都飞机工业（集团）有限责任公司 | Milling method of double-sided frame type part |
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Application publication date: 20160309 |