The one-way impaction that faces plane automation to assemble makes aperture burr control a technology

1~0.

Between 15mm) , do not need to go additionally thereby burr working procedure [1-2] . The research sense that one-way impaction automation makes aperture burr control a technology and research progress are domestic and international current and main automation assembles a system main component assembles system and light-duty automation to assemble a system for large automation, among them large automation assembles a system main form has type of C automatic bracket to get type of riveting system, D automatic bracket to get type of door of riveting system, dragon to get riveting system automatically to wait. Large automation assembles a system to have precision good, efficiency tall, cost the characteristic with Gao Herou common sex, for the balance efficiency, cost, flexible between relation, current and light-duty automation assembled a system to get unprecedented development. Compare general light-duty automation to assemble a system to basically have currently assemble automatically what be based on industrial robot system, flexible orbit automation assembles system, own movable type light-duty automation assembles a system 3 kinds. No matter be which kinds of form,be faced with move and traditional and large automation to get riveting equipment (like C model get riveter automatically) the applied environment of different one-way impaction. This makes the makes aperture craft become light-duty automation to assemble a system to be able to develop efficiency place to must be solved without burr issue of one-way impaction, also be its the technical difficult point that project application wants to solve. Place of shutout of current home photograph is being developed and introduce light-duty automation to assemble a system, if Chengdu plane makes limited company introduce automation of robot of Bao Jie industry to make aperture system, aviation create project institute,develop flexible orbit makes aperture system automatically wait, the development of these systems and application, provided pressing demand and extensive applied backdrop for this research. The plane assembles the requirement that does not have burr to basically be reflected in component interlining position, namely connective 2 (or many) do not allow to hairiness is pricked and cut bits between component. The traditional method that make hole is being made aperture hind should ravel the spare parts first go burr, affected the efficiency that assemble and automation badly. And look from the data that masters at present, study almost unmanned attention to assembling the theory of problem of joint face burr, this and foreign plane assemble many application automation to assemble craft and system to show bright contrast. The data that studies to assembling interfacial burr at present is few, melkote [3] made aperture make partial experiment research to what envelope and casing assemble, made proper analysis to the parameter such as cutting tool. But the impaction plan of the experiment (see a picture 1) assemble difference with automation further. On application, be like,large automation assembles a system C what get riveter automatically to use two-way impaction to make hole is local, the generation that avoids interlining to be in burr thereby and cut bits to enter, but as a result of light-duty the application that assembles a system just starts, belong to automation to assemble technical application forward position, the control technology of burr of place of the interlining below one-way impaction circumstance is like Boeing in foreign newest type 787, get applied in A350, but what go up as a result of product and technology is confidential, obtain relevant reference hard. Additional, in light of the information that arrives through communicating understanding with foreign equipment supplier, at present the mainest technology measure still passes an experiment to decide relevant craft parameter. Accordingly, cut burr to consider and be solved of active control technology to interface and exit are being assembled to get below one-way impaction circumstance, the development that assembles a technology to plane automation and application reach decision action since the meeting, institute of plant of production main engine of domestic each aircraft is purchased early or late or develop light-duty automation to assemble a system especially. This research will assemble the project application with effective system to provide technical support and applied safeguard for light-duty automation, be very be badly in need of and necessary. The case that one-way impaction automation makes aperture assemble joint face burr to control a technology actively to assemble joint face burr to arise and exit burr are same, if do not add special processing, can have 2 problems: Although use best craft parameter implementation not to have burr,be more difficult (aircraft component basically is Bao Bi structure, rigid difference is his important characteristic) ; 2 it is to make force of axial of the broach when aperture make assemble an interface to depart, cannot assure to cut bits to be not entered. What industry uses generally is effective reducing the method that assembles joint face burr is, through local apply pressurization to tighten force to overcome interlining interface to depart, when making constructional part is making hole " become " an organic whole, avoid an interface to be in occurrence exit burr, achieve target requirement thereby. Can say to solve assemble interfacial burr problem, thrust is mainer than other influencing factor. The gets riveting equipment automatically to use two-way impaction way of traditional pattern, if the graph is shown 2 times, can offer more reliable thrust. At this moment thrust needs to overcome axial feed force and spare parts tolerance to cause only not joint, can satisfy a requirement. (1) product structure itself has the case that support. Typical situation is the butt joint on machine figure casing, join place offers a way by casing itself to prop up. This kind of means through bringing to bear on corresponding thrust and law are made to the combination that return power to the law that support with, generation is certain " two-way " impaction effect, make the demand of aperture in order to satisfy without burr, but the influence that because prop up structural intensity, stiffness, precision,waits for an element, differ somewhat to the requirement of thrust and two-way impaction. What Nextpage needs to notice is, joist connect grows to what receive on casing, do not have those who get draw a frame round to prop up (the bottom that is located in casing) , to its research can serve as will handle without the circumstance that prop up. (2) the case that product structure itself did not support. Typical situation is the butt joint between machine figure casing, join place itself did not offer enough way to prop up (the component such as long joist has been out of shape big, the effect that has less than propping up) . Fore-and-aft wainscot joining together also has similar case. This kind of means basically considers 2 kinds of plan to solve. Plan 1: The consideration increases on tool inside template is offerred prop up. This kind of plan and have the case that support basic and same. Different point basically has: This plan can be designed according to the requirement of thrust or choose corresponding stiffness inside template undertakes propping up; This plan accepts tool structure (if open open sex) influence, often cannot apply to well a few already have product line. This plan and product have the case that support similar, pass finite yuan of calculation method, analyse typical structure to be inside permission product tolerance range, those who consider a product be out of shape circumstance, computation needs the thrust that bring to bear on. Different is: As a result of the characteristic of thin wall structure of the plane, the effect propping up of template often compares support inside the effect that product oneself structure sustains is close friends, can regard as approximately tigidity is propped up; Template won't is in the Kong Zheng lower part that place should make inside, slant to be apart from certainly however, of such products be out of shape need is analysed. Plan 2: The consideration increases to be assembled beforehand temporarily the number of fastener will offer prop up. A plan has 2 problems, it is to should change original tool in order to increase inside template, 2 it is to do not have a law to be used in the circumstance such as fore-and-aft wainscot joining together. And increase to be assembled beforehand temporarily this kind of method can be in fastener the application on original tool, will offer certain thrust to prop up through increasing to assemble rivet beforehand inside certain distance, if pursue,3 are shown. Can assemble rivet from 50% amounts to begin beforehand first, transfer stage by stage 20% the following. This part studies plan is, the action propping up that fastener assembles beforehand when analysing one-way impaction and be out of shape, computation is opposite with the fastener of the type the effect that sustain, be like temporarily rivet (include sincere hammer, POP hammer to wait) , the clip that wear a heart (can offer thrust better, but can affect automation efficiency) . The solution that one-way impaction automation makes aperture burr control a technology actively considers finite the actor defect of yuan of analysis and experiment method, the article rises union of 2 kinds of methods, low cost ground solves project problem, if pursue,4 are shown. Specific as follows: (1) use theory analysis and finite yuan of simulative method, the product when analysing one-way impaction is out of shape, the structure that prop up (like casing, inside template) be out of shape and temporarily the influence of fastener, for reasonable craft parameter (include thrust) provide academic basis. For example, the airframe in analysing plane of some branch line and in hind the joint case that belt board and casing handle to receiving upside on airframe casing, if pursue,5 are shown. Nextpage looks from analytic circumstance, below the thrust action of 500N, force of the axial that make hole is when 250N, the largest space is less than 2 joint face only 0.

003mm, and the distance that controls aperture seat actually is about 0.

0019mm, be less than than burr height 0.

The demand of 13mm is good 2 amounts class, enough and contented requirement. Same, of casing and face of joint of long joist connect close the condition is the poorest, the largest space is 0.

017mm, also can satisfy a requirement. (2) be analysed according to theory and finite yuan of simulative result, experimenting on one-way impaction makes experiment and test and verify aperture craft. (3) summary is method of selection of parameter of craft of Baconian and typical structure, fast experiment method and recommend a value. Considering experiment cost, task group made planar test above all the experiment that make hole, finite yuan the analysis makes clear as a result, below the similar requirement that prop up, planar experiment the practical test than taking curvature joint face closes the circumstance is differred 20% the left and right sides (see a picture 6) , can say to slant conservative. Measure an outcome belt board and burr of casing joint face are made an appointment with 0.

05~0.

1mm, satisfy a requirement. With analytic result difference main reason is: (A) afore-mentioned theoretical analysises did not consider ripple of product itself surface to spend wait for an error; (B) finite yuan of analytic itself precision, the stiffness that often divides separate out to come is compared actual slightly big; (C) the effect that measures an error. How to solve afore-mentioned problems, one of stresses that study next when problem of product itself tolerance especially. Plane tolerance because uncertainty, offerred abhorrent sex to analyse particular product. The article thinks according to the analysis the limiting value of place tolerance undertakes study, the analysis gives the craft parameter that can use below ultimate position, undertake study according to place of analyse of bisect of probability method or Monte Carlo law next, the analysis gives the craft parameter that can use below all sorts of probability conditions; Analyse a result according to above finally, to craft parameter to tolerance the influence undertakes sensitivity is analysed, determine best outcome. From the point of current analysis, the joint space of long joist connect and casing is larger, if consider the case with actual bigger tolerance, cannot assure to ask without burr likely, it is when tolerance is bigger, after can considering to grow joist connect to make hole, undertake ravelling alone going first the working procedure of burr, reload locks up bolt high (be filled with too cooperate to be able to make sure each aperture is homocentric) , complete other part again make hole, because large part does not need departure, can satisfy craft to ask. Detailed technique needs to be in in the light of particular structure, decide after further analysis. Applied proposal automation assembles development trend of the technology and applied current situation, decided to must make aperture technology have thorough research to one-way impaction automation as soon as possible, so that be in better the project is actual in undertake efficient applying. The author's research thinks: (1) current and light-duty automation makes aperture system be in get domestic and internationally attention, obtain tremendous progress, this makes one-way impaction automation makes aperture craft become the issue that is badly in need of solving, must control burr height effectively, ability applies these advanced automation effectively assemble a system. (2) consult the experience of foreign industry, finite yuan the analysis is the important step that solves one-way impaction automation to make aperture technology. Be aimed at particular product structure, what abstraction gives the position that make hole is finite yuan of model, deep analytic thrust is right the influence of face of joint of the place that make hole, conduce to a large number of reducing trial measure, can replace an experiment completely finally to commonly used structure even. (3) same thrust and get the requirement that cut force, the position that assembles a hammer beforehand and amount have major effect to circumstance of joint face joint and burr height, because this can be become,optimize parameter importantly. CNC Milling