Face efficient treatment and assemble harmonious three-dimensional number to build modular technology

  • Time:
  • Click:116
  • source:PHAUP CNC Machining
As the development of aviation industry, aviation structural member is large with each passing day change, complication, rise ceaselessly to the requirement of corresponding CNC Machining equipment and CNC Machining technology. In the meantime, change without paper design and create the mainstream climate that has made manufacturing industry progress, the three-dimensional number model of the spare parts begins to replace spare parts blue print to become made only basis gradually. As production basis, ask three-dimensional number model can convey all features of the spare parts, fall in the premise that assures spare parts function, the biggest the craft sex that turns treatment of contented spare parts. From home of each aviation projects begin a circumstance to look, design personnel has begun to use three-dimensional number model to serve as the production basis of the spare parts in the round, this is one of important signs that industry of our country aviation begins to march toward digitlization to make gradually. But, in the process of three-dimensional number model that designing a part, as a result of with lack is communicated between technologist, design personnel cannot unscramble the craft sex of spare parts feature well, politic to the treatment of the flow of treatment and of all kinds spare parts experience is entered not deep, the sex of craft of three-dimensional number model that brought about a design is poor, cannot coach directly craft and production, cannot satisfy craft completely to ask to the modernization of the model. Three-dimensional number model is the important link that contacts design personnel and technologist, the concentration that is product structure information is reflected. But, design personnel and technologist are right the jumping-off place of demand of three-dimensional number model is different, designing staff is the angle consideration that is based on product function, and the producibility that what technologist basically considers is a product and the element such as production cost. The three dimension matrix that shows level widespread still presence satisfied function to ask but the phenomenon with craft poor sex, this caused production cost directly rise and of efficiency reduce. The article sets out from the development characteristic of aviation structural member, technology of efficient CNC Machining checks combinative aviation structural member the requirement of three-dimensional number model, to model of plane structure number the technology that build a model undertakes discussing, discussed current aviation structural member the main train of thought of the three dimension matrix technology that build a model and development direction. Three-dimensional number model builds domestic aviation structural member 1 craft all needs modular technology current situation to undertake to three-dimensional number model craft sex builds a model 2 times to show level, very difficult whole mirrors spare parts model craft information, the member that Cheng invents technology needs 2 times to build a model to add craft information, to the model medium dot, line needs to have shift, the need opposite side undertakes deflection or plan 2 times to close, altered the original basis of the model completely, added more information at the same time, bring about a model easily " pollution " and " degrade " wait for a problem. Of the model change 2 processing that caused data at the same time and deliver, the data processing that undertakes for program of CNC Machining of follow-up work out brought a lot of inconvenience. Because design personnel to have the circumstance such as equipment and engineering technology not to understand to creating a department,the phenomenon with poorer sex of craft of 2 spare partses exists generally still, enter to the flow of treatment and methodological experience not deep, bring about inside finite design cycle, the craft sex of spare parts model gets very hard assuring. If the graph is shown 1 times, the design that is 2 models is not worth the difficult treatment part that cause to creating knowledge. The design was installed in the process that build a model a lot of close area, these places are not participated in assemble without special requirement. But to treatment, these places are difficult treatment area, rose to machine difficulty and cost greatly. The technology of 3 the standard that build a model that did not build a model to undertake guidance to the design and design do not have established standard standard, same design appears possibly in same item in different project or different design same craft sex question, craft member be in every time when new model craft is examined, the question that raises to the model is repeatability almost. 4 as bigger as international difference the ceaseless progress that makes a technology as digitlization, two big aviation industries of abroad of Boeing, empty guest had been in to change a design without paper, change production direction development without paper, have respective standard, exercisable proposes modular standard, its build a model to structural member strict control has in the process, the property that mature spare parts makes and production requirement. If the graph shows the level building a model for empty customer firm 2 times. Face assemble coordinate and number of 1 influence structural member builds the technology building a model of efficient treatment craft modular element the mainest demand of model of an eligible structural member is to satisfy use requirement, structural dimension satisfies a requirement and can satisfy the requirement that high accuracy of aviation structural member assembles namely. On this foundation, the article builds influence element of the model with respect to number of the following respect discussion. 1.

The influence equipment process capability that 1 hardware condition builds a model to the design is the main essential factor that hardware design needs to consider. The equipment place of different structure, dimension, power, precision suits be differred somewhat by treatment spare parts. These elements of equipment decided to machine each respects such as the material of the spare parts, dimension, structure, it is one of elements that digitlize the need that build a model to consider mainly. Nextpage cutting tool is used up is the body that the cost in CNC Machining uses up, have immediate effect to the production cost of the product, production cycle. The structure of cutting tool, material, precision treatment efficiency to the spare parts and cost control have very big effect. Be like formula (1) in, the long way of cutting tool compares A is to point to the ratio between H of cutting tool length and D of cutting tool diameter, it is the important parameter that cutting tool uses. Cost of mature cutting tool and treatment function, usually, long way is recommended to be than A in machining a process 2.

5, the process is designed in groovy antrum, in answering to assure to machine a process as far as possible, each cutting tool grows diameter comparing to be more than 2.

5. A=H/D. (1) 1.

The 2 influence structural member that assemble a requirement to build a model to the design serve as individual its should form combination finally through assembling realize its function, assembling a requirement to build a model to the design so is very important. Requirement of constructional harmonious relationship, precision and dimension catenary affect the three-dimensional number of structural member to build a model directly. To a structural member, participate in assemble harmonious feature to machine a requirement commonly taller. Mature assemble a requirement, dimension of structure of reasonable in the process that build a model setting and precision ask can reasonable configuration resource. 1.

The level of influence engineering technology that level of 3 engineering technology builds a model to the design builds a model to have very big effect to the design. The applied scale of spare parts of alloy of the titanium in making a technology the efficient treatment of titanium alloy, treatment of casing of titanium alloy whole, technology that insert mill, accurately wait for structural member of immediate impact aviation for instance. Additional, learn to machine the ceaseless development of craft with material as material, composite material begins a large number of application in aviation structural member, this also built a model to raise new requirement to the number of composite material. 2 face assemble coordinate the method building a model with efficient treatment craft 2.

1 mature structural member assembles the craft character that reachs treatment to ask to carry pair of aviation structural member to undertake study, all parts cent becomes integral casing, half casing, long and thin bridge, side bridge, connect, profile, costal region, wainscot, answer material to wait for 9 kinds big, divide into 18 group by size further. Every kinds of spare parts has his to assemble point and treatment craft characteristic, if why issue treatment to go out in the condition of lowermost cost,satisfy the structural member that assembles use requirement, consider the requirement that assemble and machines integratedly with respect to need, its depend on undertaking an analysis to the feature of structural member at all, establish standard of corresponding the standard that build a model. 2.

In the processes of 2 treatment of spare parts of the method that build a model that face efficient treatment craft, the treatment processing of feature of specific and local structure is very important, it is the main factor that forms spare parts breakdown, so, of local structure feature it is very important to build a model. Through undertaking an analysis to the typical feature of aviation structural member, draw-out stage of a groove, muscle, abdomen board, protruding, cave in, model the typical feature such as face, aperture, the influence element in machining a process to each feature undertakes clearing, undertake associated analysis to characteristic of structural feature itself and treatment craft, the craft sex problem that summarizes all sorts of particular structures to may happen, put forward a design to improve way, undertake to be machined hard or be being put in the part of hidden trouble the key considers at the same time. If the graph is shown 3 times, it is an aviation structural member local structure is integrated model. Union assembles harmonious requirement and condition of efficient treatment craft, groove is aimed at below kind the structure makes an introduction. (1) the deflection that avoids fabricating effect. Groove kind structural action is the structural member reduces on the oldest rate weight below the circumstance that asks in function of contented structural member. Groove is to use big cutting tool to machine bedding face, small cutting tool to receive corner and bottom horn to wait for many times to machine commonly. If the graph is shown 4 times, add man-hour for many times in different cutting tool, be like muscle the corner office between and muscle with the bottom part part between celiac board, the deflection of put apart standard is measured. The deflection that the graph avoids fabricating inside 4 chamfer (2) inside of form treatment simplify requirement. The muscle inside groove with the angle between celiac board shows 90 ° as far as possible, simplify treatment of the form inside the spare parts, if pursue,5 are shown. Groovy insole horn agrees as far as possible, different bottom role has the problem that changes cutting tool treatment not only, and the transition between different bottom horn is conveyed very hard and machine. Be in mural large size to exceed Xiaohe corner to handle exterior quality issue to avoid to be in broach to bring about corner in corner, use graphic representation means to determine corner size as far as possible, contented formula 2 (among them R expresses spare parts corner, d is cutting tool diameter) . Horn of the the spare parts corner before departmental cent has Boer operation, bottom is made come out, can make sure with effective treatment the effect agrees so, and all falling horn is the R=D/2+1 that can come true. (2) Nextpage (3) method of the design that shut part. In the structure the design asks that he must use the design that shuts part, the remain that shut part keeps clear of hard, contented below the case that considers to ensure remain is withheld as far as possible when the design assemble a condition. The plan that adopts special cutting tool should avoid as far as possible. It is very mature that commonly used series of standard changes cutting tool technology, quality is high, and the use frequency of special cutting tool is low, the technology is immature, the quality of treatment also assures hard. (4) deep chamfer devises a method. Because assemble,wait for relevant reason, partial chamfer deepness is bigger, if use a standing plan method, the cutting tool when treatment is very long, cannot assure spare parts quality. The chance to extricateoneself from an awkward position that can use section is designed, the cutting tool that makes process of each paragraphs of treatment keeps lesser from beginning to end grows diameter comparing, benefit at treatment. If the graph is shown 6 times, muscle step (deflection measures X) , the spare parts should satisfy formula between each high H and D of use cutting tool diameter (3) requirement, and total height H satisfies formula (4) requirement. Graph 6 deep chamfer design sketch map Hi<Di (I=1, 2, 3, ... ) , (3) Hi of H ≤ Σ (I=1, 2, 3, ... ) . (4) 2.

The technology building a model that 3 integrated considerations assemble harmonious requirement the production means according to the tradition, assemble need to install a spare parts to have local control to each ginseng, the control of overall outward appearance that outside considering a plane integratedly, form tolerance and spare parts tolerance accumulate, cover those who add up to cave in error to accumulate to assemble interference to locate the dot shifts to an earlier date the local surplus repairing defeat that joins control accumulates a length between element, two spare partses, accurately prefab etc, in order to achieve final and overall harmonious. Should bring into this part content the spare parts directly below the new idea that build a model in building a model, go. Total control should receive report in three-dimensional number model. If the graph is shown 7 times, build what way of length of the spare parts after assembling must consider when the model to accumulate an error. Length direction assembles the part that be together, space of timing put apart must be set in spare parts theory, with preventing the train in excess specified length after assembling. Model design should notice to cover the design that combines a division, if pursue,8 are shown. Cover deepness combining a division to should consider to make tolerancepublic errand satisfy set add up to a requirement, clearance of put apart theory. Mature assemble the problem such as interference, restrict the public errand of local bottom horn or corner, tolerancepublic errand control is in complete to tolerancepublic errand or completely negative to tolerancepublic errand, in the spare parts detailed structure design is brought into, spare parts theory size control is in hands-off limits, tolerancepublic errand control is divided to losing Xiang Jun. Additional, to ensure finished product, conduit is fast on the spare parts, accurate, stable the ground is installed, when digital-to-analogue is designed, the basis assembles a requirement, install the aperture at the beginning of the assembly with precision not high demand on structural member directly, rise greatly thereby assemble speed and precision, reduce the cost that make hole. The article is in the last word on the foundation of the current situation that model of number of structural member of brief analysis aviation builds, analysed the adverse element that in showing level to establish modular procedure, develops to the product, put forward model of a few structural member to build technical train of thought, satisfying the premise that assembles harmonious requirement to fall thereby, realized the efficient treatment of aviation structural member. CNC Milling CNC Machining