Those who be based on numerical control technology is poriferous method of tall accurate treatment studies kind of complex housing

02mm. The stress of the design requirement of high accuracy and spare parts is out of shape and machine efficiency to form contradiction, cause very great difficulty to machining, need relies on all sorts of technology measures to assure. Aperture department intersects the relation is complex spare parts of housing of hydraulic pressure of precision tall aviation is very strict to control of hydraulic pressure oil path, included the type of great majority aperture: Straight aperture, inclined hole, intersect aperture, compound angle aperture, step aperture, heavy aperture, long and thin aperture, abnormity aperture. Press accuracy class cent: Department of department of aperture of aperture of general precision requirement, high accuracy aperture, nicety of appearance position requirement, aperture of accurate force plunger, standard blocks report of head aperture, abnormity up to machine aperture to wait. The aperture need of different precision and effect is custom-built disparate technique and process instrumentation. The diametical limits span of these aperture is big, distributing in Φ 0.

5mm comes between Φ 120mm, among them the aperture that bore diameter is less than Φ 5mm is 1:3 than how0, the department of long and thin aperture of such deepness is already far the size range of pipe bent that exceeded standard cutting tool. These aperture not only claimed accuracy is tall, and intersect the relation is complex, outside communicating aperture except electric spark, each aperture has a plenty of the others planar orthogonality, inclined hand in, have a plenty of a space orthogonality, inclined hand in, some intersects with diametical aperture, also different diameter aperture intersects. Want to make sure the precision of each aperture asks, treatment is sequential the obligation that arrangement can accept housing construction. The treatment craft sex of certain treatment place is bad, need uses special cutting tool and treatment method to come true. The engineering technology of burr of big purify of purify burr difficulty, it is normally in conventional treatment craft by oversight. But of the promotion that designs ability as complex housing and high accuracy equipment popularize application, go burr technology is mastered by place of more and more engineering technology personnel. Intersect complexly aperture department burr often uses naked eye cannot observation, inside hydraulic pressure housing if existence machines odd-come-short, it is deadly harm to whole system. This is mixed at all sorts of auxiliary tools with respect to need have the aid of go burr craft will finish. Go together sometimes burr working procedure needs more than 10 kinds of tools. Accordingly, how effective purify intersects aperture burr, will become a key that assures function of housing part product to nod. As above, if traditional pattern is pressed to machine aviation hydraulic pressure on general accuracy machine tool kind housing spare parts, fixed position holds clip, can machine only model face or an aperture are, and repeat fixed position error big, the factor of the quality of spare parts of factitious element influence is big, manufacturing cycle grows and efficiency is low, the numerical control facilities that should divide the work the ministry to pass high accuracy so will finish. Numerical control technique and numerical control of treatment of technique of numerical control of process designing technology change housing treatment to should be finished as far as possible by numerical control equipment, undertake be decomposinged specificly again to can having the share of CNC Machining, go further according to characteristic of the treatment precision of machine tool of each numerical control, equipment namely refine CNC Machining. If positional precision demand is not high, but the aperture with strict requirement of public errand of the appearance of oneself, position, model the face is OK finish on machining center. And mutual between the opening that has firm position demand is, model the face can be finished on machine tool of rigid numerical control. At the same time the surplus to reduce finish machining, reduce cutting force to be affected to spare parts metabolic, rough machining, semifinishing machining can be finished by machining center. Reliable fixed position clamping apparatus pursues 2 clamping apparatus are reached according to the treatment characteristic of the machine tool consult the design of blueprint is standard, the location that chooses a spare parts is fiducial. Locate fiducial choice wants to be able to realize fast, accurate, reliable fixed position. Additional, the fixed position of machine tool of all numerical control is standard choose as far as possible same and fiducial, reduce the error of fiducial changeover. Differ fiducially according to fixed position, can with same fixed position the content of standard treatment is centered, and the basis already made good technology, arrange good treatment order, namely the which treatment content that locates fiducial place decides can be machined first, after content needs, the which treatment that locates fiducial place decides is machined. Of course, intermediate likelihood also can be put in the treatment content with same standard fixed position, ask as a result of blueprint, craft and resolve the case of treatment, but if can locate,can machine the part that come out, in the following treatment precision won't be destroyed what also do not affect other treatment content, treatment must be completed in holding clip, reduce the number that holds clip. The facility that the numerical control equipment with efficient high accuracy and treatment of housing of hydraulic pressure of cutting tool aviation need to rely on high accuracy will assure. The size range of pipe bent of equipment of different numerical control and function, meet what affect craft plan directly weave. The cutting tool technology of change quickly develops the size range of pipe bent that extended numerical control machine tool, the treatment effect that chooses to apply numerical control cutting tool to will bring twice to grow to numerical control equipment reasonably. Reasonable CNC Machining technological process is efficient and complex model equipment, those who changed traditional technological process weave. Complex housing part is machined, traditional technological process often needs about a hundred working procedure, and had simplified to need to differentiate to machine level greatly only now: Rough machining, semifinishing machining, finish machining. Process designing technology pursues quality of treatment of spare parts of rough machining of ground of 3 complex housing and process designing technology have immediate concern, because the treatment content of a program is much, handling time is long, contains information content is big, the treatment information of part of treatment of the news that has department of information of information of cutting tool dimension, treatment coordinate position, coordinate, treatment parameter information, place is waited a moment. The problem should note when Nextpage process designing 1, should finish more treatment content as far as possible in clip of fixed position outfit, and these all dimension that machine content want to express in the program, in order to make clear treatment place, search when convenient occurrence problem. Be based on this, the spare parts uses two aperture, one plane to be fixed position fiducial, after be being installed correctly, in the central coincide of planar center and machine tool revolving stage. Spare parts and relation of machine bed buy rely on clamping apparatus to pass fixed position information, the fixed position Konghe that there is each treatment on clamping apparatus searchs aperture. Locate Kong He searchs the distance that the distance of aperture is equivalent to locating aperture reachs spare parts center. Namely spare parts installation is on clamping apparatus, through drawing the parallel of straight one side and axis, assure to search the center of aperture and spare parts is coincide, so through searching clamping apparatus center, with respect to the center of can certain part. 2, process designing is fiducial: Process designing is fiducial and OK the center that chooses a spare parts directly is fiducial, in also can adopting a program fiducial slant the process designing that buy implementation needs is fiducial. Usually, process designing is fiducial what should use with blueprint is fiducial and consistent, the Kong Huo that machines axes and main shaft parallel especially and main shaft are perpendicular model face, if because drawing is special,ask, fiducial not identical, so choose commonly used fiducial. Process designing is fiducial should maintain fasten coincide with coordinate of actual part workpiece, choose exclusive coordinate department as far as possible, facilitate assure to machine quality. 3, the character that all sorts of cutting tool should know when process designing, know all sorts of fabricating characteristics that process data and applicable treatment parameter, clear avery kind of machines the precision of methodological characteristic, treatment, use occasion. Consider the spare parts is departmental the treatment craft of cent, choice first-rate machines a course. When process designing, all sorts of circumstances that appear considering the meeting in treatment as far as possible, can predict to attend a meeting occurrence problem, solve before process designing. Graph the skill when the program of finish machining work out of 4 complex housing 1, when inclined hole and the straight aperture with different treatment, compound aperture are fastened, if opening the department has reasonable classification, same and fiducial opening the department undertakes by close aperture process designing brings bigger advantage classified machining will giving. For example: Can the Kong Ge blocking a head up that norms identical, aperture is close to method of identical, treatment is machined together. Can improve efficiency already so, can avoid process designing again fiducial data input is wrong. When manual process designing, the process designing of inclined hole is fiducial get through computation, have fiducial transition according to blueprint dimension namely, it is a theoretical value, input program counteracts precision of fixed position clamping apparatus, fixed position, the place that assures inclined hole together is proper. Of course, as equipment of high accuracy numerical control popularize application, manual process designing often is replaced by the method of conversational form process designing of numerical control system, straight Kong Ke is in modular interfacial batch treatment, inclined hole can fasten translation by the coordinate in the system, rotate wait for module implementation. Before buy builds treatment coordinate in software of automatic process designing is, with respect to the treatment that achievable all aperture fastens. 2, processing an external form, when machining outline especially, radius of best use cutting tool compensates a function, such process designing purpose depends on: It is dimension of the coordinate in the program and blueprint conform to, search the treatment position of the each place in the program easily. 2 if dimension detects,be existence deviation, need not modify a program, pass the radius cost of modification cutting tool only, implementation is amended to spare parts appearance. 3, when mill machines outline, encounter inside round horn, feed cannot too big, the osculatory area that manages in round horn because of cutting tool and spare parts is the largest, cutting force adds, cutting tool breaks off easily. The bit that uses identical radius machines part of part giving a circle, treatment of reoccupy milling cutter receives smooth circular arc, such surface contact make line contact, cutting force nature falls. If use a circulation,dictate of course process designing, corner decelerate and software are automatic this kind of circumstance can reduce process designing greatly. 4, the structural element that appears to machining an object to repeat, or it is the structural element that regulation distributings, be like linear, circumferential distributing etc, can use parameter and program of implementation of conditional judgement statement to circulate, reduce process designing workload. 5, when work out program, in statement of the caption in the program. It is the Kong Hao that adds correspondence at the positional coordinate of every aperture in correspondence, facilitate the position is searched in the program, undertake modification checking. 2 it is the alternative time-out in the program, need shows account of here program inactive, it is an examination cutting tool, change pressing plate, cleared scrap to still measure size. The 3 beginning that are a program this program machines caption the statement of content, make handlers makes clear the treatment content of this program. Automatic process designing mixes environment of graph 5 CATIA fictitious emulate sort of software of automatic process designing various, graph 5, 6 it is spare parts of housing of implementation of a CATIA+Vericut the legend of program of numerical control of emulation test and verify of automatic process designing and fictitious treatment environment. Go housing of burr technology hydraulic pressure to intersecting purify of the burr inside aperture asks taller, certain place must pour round wine cup according to blueprint requirement, surface of certain and serious treatment cannot have cut, touch the blemish such as the injury, the burr of seal ring chamfer often can bring tremendous influence to product function, so of housing spare parts go burr workload is very big. Answer to reduce machining to produce the amount of burr as far as possible especially, have the control on technique to important surface especially. Will decrease go the workload of burr, improve efficiency; Reduce on the other hand go artificially the possibility that burr does not take care to mar spare parts appearance. Machine the burr of generation in the light of housing, can be its cent 3 kinds: It is appearance burr; 2 it is accurate orifice burr; 3 it is to intersect aperture burr, use different technique processing respectively: Electrochemistry goes burr, heat energy goes burr, ultrasonic goes burr, chemistry goes jet of water of burr, high pressure goes burr, roll abrasion burr to wait. Environment of graph 6 Vericut 1, to appearance burr: Cutting tool wants sharp, especially the cutting tool of semifinishing machining, finish machining. Pneumatic emery wheel is with compressing air is dynamical source, the main shaft that drives front through pneumatic motor rotates. Pneumatic emery wheel is drawing style construction cabinet and light, can realize the function of polishing and sharp edge of purify spare parts and burr according to need. 2, to accurate orifice burr: Accurate Kong Jia is versed in normally use boring cutter is machined, the burr of generation is lesser, boring cutter is last knife in aperture treatment cutting tool, its reason depends on in front the bulky burr that cutting tool produces in treatment, especially keep clear of and milling cutter can decrease with boring cutter. Of course, orifice burr still needs final polishing purify. 3, alternate aperture burr is housing burr most hard of purify, especially long and thin oil path aperture is in the flange burr of housing interior across. Manual purify intersects aperture burr, but have the aid of is globose burnish head. The front of globose burnish head is globose, whole sphere distributings many cutting blade, length also can be mixed according to hole depth spare parts structure is custom-built. Main use is purify deep aperture, stoma and the arris limit that cannot reach place by hand and burr, can pour arris side the circle to aleatoric R dimension. External form of spare parts of housing of aviation hydraulic pressure is complex, aperture fastens nicety, through making full use of the characteristic of new and high equipment, optimize numerical control to change technological process, make machine efficiency to promote considerably, treatment quality got stabilizing controlling, reduced the effect of the artificial quality element that traditional process brings. Through applying software of process designing of the buy before advanced CATIA to ensure the program is not had by accident, use environment of Vericut fictitious treatment to ensure the validity of program contrail, prevented to collide, optimize eliminate program empty cutting. New-style go the complete change that burr tool brought technique of housing spare parts. CNC Milling