CN104571048A - Method for evaluating machining technology of airplane structure parts based on value engineering and machining characteristics - Google Patents

Method for evaluating machining technology of airplane structure parts based on value engineering and machining characteristics Download PDF

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CN104571048A
CN104571048A CN201510014992.8A CN201510014992A CN104571048A CN 104571048 A CN104571048 A CN 104571048A CN 201510014992 A CN201510014992 A CN 201510014992A CN 104571048 A CN104571048 A CN 104571048A
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aircraft structure
cost
processing
machining
value
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李迎光
张臣
楚王伟
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41885—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by modeling, simulation of the manufacturing system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Manufacturing & Machinery (AREA)
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Abstract

A method for evaluating a machining technology of airplane structure parts based on value engineering and machining characteristics is characterized by comprising the following steps that according to the technological characteristics of the airplane structure parts, the airplane structure parts are divided into a series of machining characteristics, and the typical machining technology cost of the machining characteristics of each class is analyzed; the machining technologies of the machining characteristics of the airplane structure parts are combined to form a plurality of sets of machining technology schemes of the airplane structure parts, and the machining cost is obtained by calculating the machining cost of the machining technologies selected by the machining characteristics; a value grading scheme of the machining technology of the airplane structure parts is built, and value grading of each set of machining technology schemes is obtained; according to the cost estimation and value grading of the airplane structure parts of each machining technology scheme, a value cost evaluation index is built; the machining technology schemes of the airplane structure parts are evaluated, and the machining technology schemes of the airplane structure parts are preferably selected accordingly. According to the method, the machining technology evaluation problem of the multiple technology schemes in the numerical control machining of the airplane structure parts can be solved.

Description

Based on the aircraft structure processing technology evaluation method of value engineering and machining feature
Technical field
The present invention relates to aircraft digital design and manufaction technical field, especially a kind of design for NC of aircraft structure and assessment technique, specifically a kind of aircraft structure processing technology evaluation method based on value engineering and machining feature.
Background technology
The uniform strength design that it is feature that modern aircraft design extensively adopts with thin-walled and one-piece construction, aircraft structure presents the development trend in integration, maximization, complicated direction.The employing of integral structure component greatly reduces airframe number of parts, decreases assembly work amount, and the workmanship of aircraft is significantly improved.In aircraft industry, aircraft structure is the important component part forming airframe and aerodynamic configuration, and the huge number of aircraft structure, function, shape are different, as polytypes such as frame, beam, rib, wallboards.Aircraft structure complex structure, machining feature is many, comprises a large amount of free form surface, intersecting features and special machining area, and difficulty of processing is large, and its typical machining feature comprises chamber groove, muscle and profile, and the feature of each large class can comprise again a lot of corresponding subcharacter.The main manufacturing process of aircraft structure is digital control processing, Aviation Manufacturing Enterprises NC lathing must successfully manage the challenge that product becomes batch fast, Flexible production and rapid response manufacturing bring, and rationally, fast carries out aircraft structure Design Processing and decision-making.Manufacture characteristic due to aircraft structure complex structure, multi items and short run result in its technological design and has complicacy and polytrope, and the processing how selecting the processing technology optimized to carry out aircraft structure has great importance, simultaneously for Aviation Manufacturing Enterprises, along with the increase of new machine development demand, rationally determine the manufacturing capacity of self, manufacturing operation that is that outsourcing oneself is bad at or that do not have ability to complete is paid development task for guarantee on schedule and is had important current demand, particularly for when having large quantities of aircraft structure to manufacture demand, the manufacturing operation of outsourcing aircraft structure effectively can ensure the manufacturing cycle, thus need to select suitable outsourcing enterprise in the process of outsourcing, also the problem that outsourcing enterprise manufactures the evaluation of aircraft structure manufacturing capacity is faced with, manufacturing capacity Main Basis outsourcing enterprise evaluates in the processing technology of aircraft structure.For this reason, for the manufacture characteristic of aircraft structure, the present invention adopts the means combined based on value engineering and machining feature by setting up the processing technology evaluation problem be worth in the processing of cost coefficient evaluation index solution Flight Structures NC Machining under Alternative Process Plans, for cost estimating and the value scoring foundation value Cost Evaluation index of the aircraft structure of often kind of processing method, the various processing methods of aircraft structure are evaluated, accordingly the processing method of preferred aircraft structure.The present invention can solve the processing technology evaluation problem in Flight Structures NC Machining processing under Alternative Process Plans.
Summary of the invention
The object of the invention is for aircraft structure complex structure, batch is little, wide in variety and lack necessary processing technology evaluation method and index, cause the problem affecting final crudy and progress, a kind of aircraft structure processing technology evaluation method based on value engineering and machining feature is provided, solves the processing technology evaluation problem under Alternative Process Plans in Flight Structures NC Machining processing.
Technical scheme of the present invention is:
Based on an aircraft structure processing technology evaluation method for value engineering and machining feature, it is characterized in that it comprises the following steps: first, according to the process characteristic of aircraft structure, aircraft structure is divided into a series of machining feature; Secondly, analyze the processing technology of every class machining feature, the cost that often kind of processing technology expends by the cost of charp tool, material cost and process time cost structure, calculate the processing cost of all kinds of processing technology accordingly; 3rd, by the processing method being combined to form many groups of aircraft structure of often kind of processing technology of each for aircraft structure machining feature, the processing cost that aircraft structure often organizes processing method calculates acquisition by the processing cost under the processing technology chosen of each machining feature; 4th, set up the value marking scheme of aircraft structure processing technology, the value scoring under processing method is often organized in acquisition; 5th, for cost estimating and the value scoring foundation value Cost Evaluation index of the aircraft structure of often kind of processing method, the various processing methods of aircraft structure are evaluated, determines the processing method of aircraft structure accordingly.
Concrete steps are:
(1) according to the process characteristic of aircraft structure, aircraft structure is divided into a series of machining feature M i(i=1,2 ..., r), analyze the exemplary process N of every class machining feature ij(i=1,2 ..., r; J=1,2 ..., s i) processing cost, adopt the cost of often kind of processing technology by the cost of charp tool, material cost and process time cost calculate according to formula (1), the cost that various processing technologys corresponding to often kind of machining feature expend can be calculated accordingly;
C(N ij)＝C(cutter ij)+C(material ij)+C(time ij) (1)
C (N ij) cost that expends in a jth processing technology for aircraft structure i-th feature; C (cutter ij) be the cost of charp tool of aircraft structure i-th feature under a jth processing technology; C (material ij) be the material cost of aircraft structure i-th feature under a jth processing technology; C (time ij) be the time cost of aircraft structure i-th machining feature under a jth processing technology;
(2) the different processing method P of aircraft structure is combined to form by often kind of processing technology of each machining feature of aircraft structure k(k=1,2 ..., a), the cost that the processing technology that the cost that aircraft structure often organizes processing method can be chosen by each machining feature expends calculates according to formula (2) and obtains, and forms the cost model under the different processing technology combination of each machining feature of aircraft structure;
C ( P k ) = Σ i = 1 r C ( N ij ) - - - ( 2 )
C (P k) be aircraft structure processing method P k(k=1,2 ..., cost a).
(3) the value code of points of each processing technology of aircraft structure is set up according to the punishment of delivery delay and the customer type of Project Product in the schedule requirement of the importance of aircraft structure in the development of whole Project Product, Project Product, Project Product, carrying out expert analysis mode according to being worth often kind of processing method of code of points for aircraft structure, obtaining the value scoring V (P under often kind of processing method according to formula (3) k) (k=1,2 ..., a);
V(P k)＝V k1W 1+V k2W 2+V k3W 3+V k4W 4(3)
V k1and W 1be respectively value scoring and the weight coefficient of the importance of aircraft structure in whole Project Product development, V k2and W 2be respectively aircraft structure to mark and weight coefficient in the value of the schedule requirement of Project Product, V k3and W 3be respectively value scoring and the weight coefficient of the punishment of aircraft structure delivery delay, V k4and W 4be respectively aircraft structure to mark and weight coefficient according to the value of the customer type of Project Product;
(4) for cost and the value scoring foundation value Cost Evaluation index KCP of the aircraft structure under often kind of processing method k(k=1,2 ..., a) such as formula shown in (4), according to the value Cost Evaluation index KCP calculated kcarry out the evaluation of the various processing method of aircraft structure, select KCP klarge processing method is as the preferred processing method of aircraft structure;
KCP k = V ( P k ) C ( P k ) - - - ( 4 )
KCP kfor the value Cost Evaluation index under an aircraft structure kth processing method, V (P k) be the value scoring under an aircraft structure kth processing method, C (P k) be the cost estimating under an aircraft structure kth processing method;
After adopting such scheme, the present invention is according to the process characteristic of aircraft structure, aircraft structure is divided into a series of machining feature, analyze the exemplary process of every class machining feature, the cost that often kind of processing technology expends by the cost of charp tool, material cost and process time cost structure, calculate the processing cost of all kinds of processing technology accordingly; The processing method being combined to form many groups of aircraft structure of often kind of processing technology of each machining feature of aircraft structure, the processing cost that aircraft structure often organizes processing method calculates acquisition by the processing cost under the processing technology chosen of each machining feature; Set up the value marking scheme of aircraft structure processing technology, the value scoring under processing method is often organized in acquisition; For cost estimating and the value scoring foundation value Cost Evaluation index of the aircraft structure of often kind of processing method, the various processing methods of aircraft structure are evaluated, the processing method of preferred aircraft structure accordingly, solves the processing technology evaluation problem under Alternative Process Plans in Flight Structures NC Machining processing.
The invention has the beneficial effects as follows: little, wide in variety and lack necessary processing technology evaluation method to be worth and cost angle considers the quality of aircraft structure processing technology comprehensively for aircraft structure complex structure, batch; Adopt the method that machining feature is decomposed, the processing technology in conjunction with machining feature carries out the accuracy that cost estimating improves the estimation of aircraft structure processing cost.
Accompanying drawing explanation
Fig. 1 is that the feature of aircraft structure in the present invention divides schematic diagram.
Fig. 2 is the processing technology schematic diagram of each machining feature of aircraft structure in the present invention.
Fig. 3 is the processing method schematic diagram of aircraft structure in the present invention;
Fig. 4 is that in the present invention, aircraft structure processing technology is worth code of points schematic diagram.
Fig. 5 is that in the present invention, aircraft structure processing method is worth Cost Evaluation process schematic.
Fig. 6 is a Typical Aircraft structural member schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail.
As Figure 1-5.
Based on an aircraft structure processing technology evaluation method for value engineering, it is characterized in that comprising the steps:
(1) according to the process characteristic of aircraft structure, aircraft structure is divided into a series of machining feature M i(i=1,2 ..., r), as shown in Figure 1, analyze the processing technology N of every class machining feature ij(i=1,2 ..., r; J=1,2 ..., s i), (note: although each machining feature in Fig. 2 has n processing technology because the processing technology of each feature is not necessarily identical, therefore uses s as shown in Figure 2 irepresent), adopts the cost of often kind of processing technology machining feature by the cost of charp tool, material cost and process time cost according to formula (1) calculating, the cost that various processing technologys corresponding to often kind of machining feature expend can be calculated accordingly;
C(N ij)＝C(cutter ij)+C(material ij)+C(time ij) (1)
C (N ij) cost that expends in a jth processing technology for aircraft structure i-th feature; C (cutter ij) be the cost of charp tool of aircraft structure i-th feature under a jth processing technology; C (material ij) be the material cost of aircraft structure i-th feature under a jth processing technology; C (time ij) be the time cost of aircraft structure i-th machining feature under a jth processing technology;
(2) often kind of processing technology of each machining feature of aircraft structure divided be combined to form different aircraft structure processing method P k(k=1,2 ... a), as shown in Figure 3, the cost that the cost that aircraft structure often organizes processing method can be expended by the processing technology of each Feature Selection calculates according to formula (2) and obtains, and forms the cost model under the different processing technology combination of each feature of aircraft structure;
C ( P k ) = Σ i = 1 r C ( N ij ) - - - ( 2 )
C (P k) be aircraft structure processing method P k(k=1,2 ..., cost a).
(3) the value code of points of each processing technology of aircraft structure is set up according to the punishment of delivery delay and the customer type of Project Product in the schedule requirement of the importance of aircraft structure in the development of whole Project Product, Project Product, Project Product, as shown in Figure 4, carrying out expert analysis mode according to being worth often kind of processing method of code of points for aircraft structure, obtaining the value scoring V (P under often kind of processing method according to formula (3) k) (k=1,2 ..., a);
V(P k)＝V k1W 1+V k2W 2+V k3W 3+V k4W 4(3)
V k1and W 1be respectively value scoring and the weight coefficient of the importance of aircraft structure in whole Project Product development, V k2and W 2be respectively aircraft structure to mark and weight coefficient in the value of the schedule requirement of Project Product, V k3and W 3be respectively value scoring and the weight coefficient of the punishment of aircraft structure delivery delay, V k4and W 4be respectively aircraft structure to mark and weight coefficient according to the value of the customer type of Project Product;
(4) for cost and the value scoring foundation value Cost Evaluation index KCP of the aircraft structure under often kind of processing method k(k=1,2 ..., a) such as formula shown in (4), according to the value Cost Evaluation index KCP calculated kcarry out the evaluation of the various processing method of aircraft structure, select KCP klarge processing method is as the preferred processing method of aircraft structure;
KCP k = V ( P k ) C ( P k ) - - - ( 4 )
KCP kfor the value Cost Evaluation index under an aircraft structure kth processing method, V (P k) be the value scoring under an aircraft structure kth processing method, C (P k) be the cost estimating under an aircraft structure kth processing method.
Below in conjunction with embody rule example, effect of the present invention is described.
Two-sided aircraft structure as shown in Figure 6, include 15 slot machining features, each slot machining feature comprises the process operations such as web surface, interior profile and corner, comprises: (1) roughing, milling web, milling inner mold and milling corner for the typical processing technology of cavity feature; (2) roughing, milling inner mold, milling web and milling corner.For often kind of processing technology of slot machining feature, the processing cost expended under calculating often kind of processing technology according to formula (2), in two-sided aircraft structure, the cost under above-mentioned two kinds of exemplary process conditions of i-th machining feature is designated as C respectively 1.iand C 2.i(i=1,2 ..., 15), formed such as formula the Cost matrix under the different exemplary process schemes of each slot machining feature shown in (5) like this:
F cos t = C 1.1 . . . C 1.15 C 2.1 . . . C 2.15 - - - ( 5 )
The various combination 2 of two kinds of exemplary process of each cavity feature 15form the cost under 32768 kinds of processing methods of two-sided aircraft structure and 32768 kinds of processing methods, in order to describe the problem, from above-mentioned 32768 kinds of processing methods, choose 4 kinds of process programs method of the present invention is described, the 4 kinds of process programs chosen are expressed as follows:
Process planning 1＝[C 1.1，C 1.2...，C 1.14，C 1.15]
Process planning 2＝[C 2.1，C 1.2...，C 1.14，C 1.15]
Process planning 3＝[C 1.1，C 1.2...，C 1.14，C 2.15]
Process planning 4＝[C 2.1，C 1.2...，C 1.14，C 2.15]
The cost estimating of each process program of table 2
In often kind of process program, each cavity feature cost sum forms the processing cost under this kind of process program, the cost estimating that can obtain like this in 4 kinds of process programs that two-sided aircraft structure chooses is as shown in table 2, according to the importance of two-sided aircraft structure in whole Project Product development, the schedule requirement of Project Product, in Project Product, the punishment of delivery delay and the customer type of Project Product set up the value code of points of each processing technology of aircraft structure, expert analysis mode is carried out according to being worth often kind of processing method of code of points for aircraft structure, obtain the value grade form shown in table 3, the value scoring under often kind of processing method is obtained according to formula (3).The value COST system that can calculate these four kinds of process programs is accordingly as shown in table 4,
The value assessment of the two-sided aircraft structure of table 3
Table 4 is worth cost coefficient
As can be seen from Table 4, have maximum value cost coefficient for process program 4 in four kinds of processing methods that two-sided aircraft structure is chosen, therefore, be worth angle from minimizing processing cost and increase, process program 4 is a kind of processing technologys optimized.
Above example is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
The part that the present invention does not relate to prior art that maybe can adopt same as the prior art is realized.

Claims (5)

1., based on an aircraft structure processing technology evaluation method for value engineering and machining feature, it is characterized in that it comprises the following steps: first, according to the process characteristic of aircraft structure, aircraft structure is divided into a series of machining feature; Secondly, analyze the processing technology of every class machining feature, the cost that often kind of processing technology expends by the cost of charp tool, material cost and process time cost structure, calculate the processing cost of all kinds of processing technology accordingly; 3rd, by the processing method being combined to form many groups of aircraft structure of often kind of processing technology of each for aircraft structure machining feature, the processing cost that aircraft structure often organizes processing method calculates acquisition by the processing cost under the processing technology chosen of each machining feature; 4th, set up the value marking scheme of aircraft structure processing technology, the value scoring under processing method is often organized in acquisition; 5th, for cost estimating and the value scoring foundation value Cost Evaluation index of the aircraft structure of often kind of processing method, the various processing methods of aircraft structure are evaluated, determines the processing method of aircraft structure accordingly.
2. method according to claim 1, is characterized in that: according to the process characteristic of aircraft structure, and aircraft structure is divided into a series of machining feature M i(i=1,2 ..., r), analyze the processing technology N of every class machining feature ij(i=1,2 ..., r; J=1,2 ..., s i), wherein r represents machining feature quantity, s that aircraft structure divides irepresent the processing technology quantity that machining feature i is corresponding, adopt the cost of often kind of processing technology by the cost of charp tool, material cost and process time cost calculate according to formula (1), the cost that various processing technologys corresponding to often kind of machining feature expend can be calculated accordingly;
C(N ij)＝C(cutter ij)+C(material ij)+C(time ij) (1)
C (N ij) cost that expends in a jth processing technology for aircraft structure i-th feature; C (cutter ij) be the cost of charp tool of aircraft structure i-th machining feature under a jth processing technology; C (material ij) be the material cost of aircraft structure i-th machining feature under a jth processing technology; C (time ij) be the time cost of aircraft structure i-th machining feature under a jth processing technology.
3. method according to claim 1, is characterized in that: often kind of processing technology of each machining feature of aircraft structure is combined to form different aircraft structure processing method P k(k=1,2 ..., a), the cost that the processing technology that the cost that aircraft structure often organizes processing method can be chosen by each machining feature expends calculates according to formula (2) and obtains, and forms the cost model under the different processing technology combination of each machining feature of aircraft structure;
C (P k) be aircraft structure processing method P k(k=1,2 ..., cost a).
4. method according to claim 1, it is characterized in that: set up the value code of points of each processing technology of aircraft structure according to the punishment of delivery delay and the customer type of Project Product in the schedule requirement of the importance of aircraft structure in the development of whole Project Product, Project Product, Project Product, carrying out expert analysis mode according to being worth often kind of processing method of code of points for aircraft structure, obtaining the value scoring V (P under often kind of processing method according to formula (3) k) (k=1,2 ..., a);
V(P k)＝V k1W 1+V k2W 2+V k3W 3+V k4W 4(3)
V k1and W 1be respectively value scoring and the weight coefficient of the importance of aircraft structure in whole Project Product development, V k2and W 2be respectively aircraft structure to mark and weight coefficient in the value of the schedule requirement of Project Product, V k3and W 3be respectively value scoring and the weight coefficient of the punishment of aircraft structure delivery delay, V k4and W 4be respectively aircraft structure to mark and weight coefficient according to the value of the customer type of Project Product.
5. method according to claim 1, is characterized in that: for cost and the value scoring foundation value Cost Evaluation index KCP of the aircraft structure under often kind of processing method k(k=1,2 ..., a), shown in (4), according to the value Cost Evaluation index KCP calculated kcarry out the evaluation of the various processing method of aircraft structure, select KCP klarge processing method is as the preferred processing method of aircraft structure;
KCP kfor the value Cost Evaluation index under an aircraft structure kth processing method, V (P k) be the value scoring under an aircraft structure kth processing method, C (P k) be the cost estimating under an aircraft structure kth processing method.
CN201510014992.8A 2015-01-12 2015-01-12 Method for evaluating machining technology of airplane structure parts based on value engineering and machining characteristics Pending CN104571048A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105469280A (en) * 2015-11-24 2016-04-06 杭州易上弘网络技术有限公司 Home textile product pricing method based on technology combination and cutting piece template
CN111104714A (en) * 2019-12-24 2020-05-05 肇庆市海特复合材料技术研究院 Balance analysis method for composite material connecting rod scheme

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105469280A (en) * 2015-11-24 2016-04-06 杭州易上弘网络技术有限公司 Home textile product pricing method based on technology combination and cutting piece template
CN111104714A (en) * 2019-12-24 2020-05-05 肇庆市海特复合材料技术研究院 Balance analysis method for composite material connecting rod scheme
CN111104714B (en) * 2019-12-24 2023-08-15 肇庆市海特复合材料技术研究院 Weighing analysis method for composite material connecting rod scheme

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