CN106903357A - The processing method in thin-walled honeycomb core Curve Machining type face - Google Patents

Abstract

The processing method in a kind of thin-walled honeycomb core Curve Machining type face disclosed by the invention, it is desirable to provide a kind of milling efficiency is high, can extend the honeycomb processing method in cell-specific combination type milling cutter life-span, the technical scheme is that：When honeycomb processing early stage two-sided tape fixing state is good, the cell-specific combination milling cutter for returning slitting milling cutter with Cone Disc is used instead to be cut, change the direction of rotation that cell-specific combines milling cutter, returning slitting milling cutter by 30 °~45 ° Cone Discs of the angle of wedge of high speed swivel feeding carries out cutting roughing, by the cutter rotation mode counterclockwise of cutter direction of rotation, 1. rotate counterclockwise applies downward pressure to honeycomb featheredge region, the part that cutting profile most thin honeycomb featheredge in honeycomb bottom is easily pulled up milling wound is first processed, after 1. NOMEX honeycomb parts blank honeycomb featheredges region processes, successively to webbing region cutting profile 2.~6. thickness direction order gradient process, reprocessing other parts.

Description

The processing method in thin-walled honeycomb core Curve Machining type face

Technical field

The present invention relates to a kind of process for machining and manufacturing of mechanical field comb core Nomex honeycomb parts, especially thin-walled The processing method of aramid fiber paper substrate honeycomb core.

Technical background

Cellular material has very big difference as a kind of porous material and solid material, and its mechanical property is except relying on In matrix material performance in itself, cellular material microscopic void, the geometry topological structure of honeycomb hole trellis shape are more dependent upon.It is local The structure parameters influence of feature unit honeycomb macro-mechanical property, and the comb core of different cell elements has different performances. Usually using aluminium cell foams or glass cloth sandwich, its honeycomb has modulus of compressibility high and lightweight excellent to core in aircaft configuration Point, they are the widely used sandwich materials of aircaft configuration.Cellular sandwich or comb core are with the modified ring of impregnating resin glue Oxygen adhesive or modified phenolic gluing agent etc. are the sheet material of adhesive material, and such as paper, glass cloth, metal foil make cellular, work It is the light-weight filler of sandwich, its structural parameters is mainly the length of side, wall thickness, honeycomb height and capacity.Although early stage is used as honeybee The honeycomb sandwich constructions such as aluminium alloy sandwich, the glass cloth sandwich of nest interlayer sandwich have prominent in performance than metal sheet metal structure The cellular sandwich materials such as advantage, aluminium alloy sandwich, glass cloth sandwich are still present a series of problem in use：Aluminium honeybee Nest core mechanical property is good, good endurance, heat conduction, technical maturity but complexity, meeting during with carbon fiber composite panel directly contact There is electrochemical corrosion, rigid aluminum alloy honeycomb and the cementing difficulty of composite material face, be machined counter plate and honeybee The requirement on machining accuracy of nest core is high, complex process.Aluminum alloy honeycomb is multiple with the glass fiber compound material as panel, carbon fiber The thermal coefficient of expansion difference of condensation material is larger, and thin-walled honeycomb aluminium core is in depth, opposite side distance difference by under coplanar loads effect Stress intensity is small, easily causes the phenomenons such as cracking, deformation and distortion during manufacture and use in the presence of thermal stress.Aluminium is closed Golden honeycomb is directly cementing with carbon fiber composite panel to be contacted, and there is also electrochemical corrosion phenomenon.Glass cloth sandwich also because Complex process and limit its application.The need for being improved with the development of aircraft industry and to aeroplane performance, in military and civilian's machine knot In structure design, new material, new technology are increasingly employed, the designing technique of composite structure is exactly one kind therein. Report that composite accounts for 25% ratio in A380 airplane designs, the technique for aircraft composite of Boeing 787 according to foreign literature Utility ratio has reached the ratio of the 50% of gross weight.It is wing box wallboard large-scale on machine, covering, fixed front and rear edge, central wing, interior The Nomex honeycomb parts such as outer wing flap, the stringer of various shape, beam, rib are designed to composite Nomex honeycombs zero Part.The application of paper substrate honeycomb core has been not limited solely on the structural members such as wing flap, leading edge, trailing edge, rudder radome fairing empennage, this More than a little honeycomb parts using the carbon fibers of variform such as ripple type, square, triangle, quadrangle, regular hexagon, circle, The materials such as aramid fiber, honeycomb core, in the composite structure of huge number, sandwich structure is relatively conventional one kind, it It is made up of the sandwich material of both sides panel and centre.And after folding the stretched shaping of block by aramid fiber paper substrate, dip-coating is satisfactory Phenolic resin and obtain during the paper substrate aramid fiber Nomex honeycomb cores with specific honeybee lattice size and dimension sandwich material are exactly the structure A kind of conventional core.Aramid fiber paper honeycomb core has that quality is small, specific strength is high, specific stiffness is high as a kind of porous structure material, Specific stiffness is generally 9 times of steel, corrosion-resistant, shock resistance, under identical density, the compressive strength of Nomex comb core materials and Shear strength is suitable with glass cloth honeycomb, and has toughness and impact higher, because of its good self-extinguishment, excellent isolation The premium properties such as property, are widely used.Nomex paper substrate honeycombs are big due to seal gas volume, with specific strength and ratio higher Rigidity, and the heat-insulated of air, sound insulation value are better than any solid material, wing flap, leading edge in aircraft, trailing edge, rudder, tail There is extensive application at the positions such as the wing, the radome fairing of satellite.Due to performances such as sound insulation, heat-insulated and self-extinguishments, in aircraft, warship Ship, the inside panel of bullet train, decorative panel, luggage carrier etc. are widely used.Due to excellent saturating electromagnetic characteristics, in aircraft The part such as radome and radar antenna is applied.Deeply applied with the extensive of Nomex paper substrate honeycomb sandwiches, at present Just gradually replace aluminum honeycomb compound material.The processing of Nomex cellular sandwich Nomex honeycomb parts and fixing present situation Nomex honeycomb tools While having series of advantages, also along with an important shortcoming：Because Nomex honeycombs are a kind of thin-walled loose structure, wall Thickness is only 0.06~0.1mm, and the length of side of cell is general between 2-5mm so that honeycomb axially have along cell it is very high Intensity, and the equivalent strength very little in face.Because stress is non-directional, will be produced very in the presence of the face internal force of very little Big deformation, or even by conquassation, therefore the paper substrate honeycomb material such as Nomex, it is impossible to real by clamping using traditional entity workpiece The method now fixed.Honeycomb is mainly made up of panel, honeycomb core and cementing agent, comb core material be by with it is lightweight, Density is small, specific strength specific stiffness is high, with good self-extinguishment, excellent insulating properties, the poly- virtue of excellent chemical characteristic The paper substrate honeycomb core that nylon is made.Many Nomex honeycomb cores parts are by the honeycomb core of two or more different densities Composition, and honeycomb core theory profile uses two-way ply angles and its laying boundary line is the position line of composite material skin, laying Step surface is arranged on theoretical profile, and laying region irregularly intersects, and the transitional region and its characteristic size between laying are very Small, structure is complex.Its typical structure is to press from both sides honeycomb core between upper and lower two-layer panel, be bonded by adhesive and through overvoltage, draw, The processing methods such as heat seal are composited.Panel material mainly has composites such as glass fibre, Kevlar fibers, carbon fiber and each Plant metal.Because the profile and profile of honeycomb core want component profile, honeycomb core would generally be machined in production, Need to carry out the machinings such as a large amount of millings, drilling in actual applications.Due to being also easy to produce burr, wire drawing, layering in machining It is serious etc. phenomenon, and tool wear, and the machining quality of cellular board directly determines the overall performance of cellular board, belongs to Typical difficult-to-machine material.

At present, the processing molding method of aramid fiber honeycomb card board plate part mainly has three kinds：Be glued shaping, co-curing shaping with And machining shaping.It is that, using the upper and lower panel for first solidifying cellular board, the size further according to part is required to honeybee to be glued shaping Nest core and panel carry out machining, finally in autoclave, the once curing molding on mould is existing cellular sheet metal forming compared with It is a kind of common method.Have the disadvantage complex procedures, the production cycle is long, the manufacture to type face complexity sandwich part is present not Convenient many drawbacks.Co-curing shaping is that panel and honeycomb core in its uncured state are once solidified on mould Type, then repaired by the machining in later stage, obtain cellular board part.The method obtains each position synchronization of cellular board part Solidification, adhesion strength is high, and processing step is simple, with short production cycle, it is adaptable to the complicated part production of the face such as sphere, housing type. Have the disadvantage the more difficult control of production process surface quality, surface quality is poor.Machining shaping is by cutting, milling, drilling etc. Machining, molded honeycomb is cut by size requirement, required part is cut into.At present, in honeycomb card board, aluminum honeycomb panel And using more in the machine-shaping of some other metal material cellular board part.The method is with short production cycle, it is not necessary to mould Tool, disclosure satisfy that changeable Production requirement.Have the disadvantage that crudy is relatively difficult to ensure card.

Paper substrate aramid fiber Nomex is formed by impregnation papermaking after crisscross laying by Aramid fibers, actually A kind of composite of mixed type.Virtue wheel fiber is currently to be machined the material being most difficult in composite, be particularly easy to layering, Fluffing.The cutter of selection is improper, can make the edge delamination after cutting, fluff, burns.Nomex honeycomb cores blank is making After the completion of, to meet follow-up assembling, it is necessary to carry out certain Milling Process.Because Nomex honeycombs can only bear larger axle Xiang Li, and almost a pressure is flat in face, its holding method is very different with conventional entity material, can only fixed cellular bottom Linear contact lay is realized on face lattice side, and fixing power is smaller so that often appearance fixing power is not enough in the processing of Nomex honeycombs, and honeycomb is by knife , there is the phenomenon cut, scrap in tool pull-up.

The processing of Nomex honeycomb core parts is related to two critical technologies and problem：The cellular fixings of NOMEX, work Dress technology.The main method in the cellular Milling Process honeycomb Curve Machining type faces of Nomex is High-speed NC Machining.High-speed numeric control machine The cellular processing characteristics of bed processing is often depending on cell-specific cutter.Because aramid fiber paper honeycomb core class honeycomb periphery one week is thin Wall, walled thickness, typically in 0.2mm-0.5mm, is the honeycomb knot that aramid paper is made up regular hexagon of special manufacturing process Structure, its axial material composition is continuous, and the maximum direction of rigidity can bear very big pressure, and in axial plane, Material composition is discontinuous, and rigid very little, machinability is very poor.The honeycomb power of the bending stiffness single load bearing in honeycomb Curve Machining type face Learn performance, and thin-walled honeycomb inner surface and its honeycomb compared with the local failure that occurs of macrovoid, honeycomb side wall is in normal pressure In the presence of can produce frictional force hinder honeycomb core motion, to processing bring very big problem.The virtue of stephanoporate thin wall structure Synthetic fibre paper honeycomb core, single band is rigidly excessively poor, in the case of the directional stiffness of strip direction and vertical strip is all very poor, resistance The ability of deformation is very weak.Bar interband be again by resin be glued form, bear cutting force ability without image of Buddha rigid material that Model machine tool is gripped, and this brings many difficult points to the processing of paper honeycomb core.Therefore, the research in terms of paper honeycomb machining In recent years it is also more and more.These Nomex honeycomb core Nomex honeycomb parts are due to its special material property and structure design Feature, to ensure that the product without image of Buddha metal Nomex honeycomb parts Set and Positioning and cutting has precision and surface quality higher, The processing request of honeycomb core Nomex honeycomb parts is processed by Digit Control Machine Tool and ensures theoretical profile and laying boundary, to ensure With the quality that composite material skin and remaining skeleton Nomex honeycomb parts etc. are engaged the part honeycomb core to be formed.Therefore, it is right Numerical control machine tool, cutter, frock, cutting parameter, journey compile the sides such as the process control and quality control in method, digital control processing Face proposes requirement very high.Traditional Cutting Process does not adapt to the processing of new Nomex honeycomb core Nomex honeycomb parts Pattern, requirement honeycomb cellular structure member of the honeycomb core Nomex parts to machining tool be paper material, stephanoporate thin wall structure, this just determines Its processing method is determined different with other hardwares.The numerical-control processing method pair of conventional metal Nomex honeycomb parts The processing of Nomex honeycomb core NOMEX honeycomb parts is no longer applicable.

Aramid fiber paper honeycomb composite material is that flexible high molecular material bonds integration shaping, under the effect of cutter attack load, Bonding point local pressure is excessive to be easily caused disengaging destruction, and thin-wall construction material is soft, flexible strong, tear-resistant, easy by lateral cutting forces Lodging is impaired, and core bar is more long after processing.During Tool in Cutting, machinability is poor, when being acted on by cutting force, honeycomb core strip stress The generation bending that bends is avoided, and cutter is difficult its effective cut-out from root.Cellular material flexibility matter is soft, and poor thermal conductivity is cut When cutting, frictional heat generation is more, and cutting region temperature is raised can accelerate tool wear, and honeycomb core strip cut-out is difficult, belongs to more difficult to process Material.There is following difficult point in digital control processing in Nomex honeycomb core parts.(1) as bearing carrier packing material Nomex Honeycomb parts material is a kind of function and structure integration material for integrating lightweight, high specific strength and specific stiffness, is porous thin Wall construction, is laterally difficult to bear the cutting force of external compression and impact property；(2) material flexibility is fixed like that without image of Buddha rigid material Position；(3) the area very little of honeycomb core entity part, for compression, unstability the two-way ply angles processing request in dimorphism face it is high. The research of compression and ballistics behavior for honeycomb that oneself has shows that mechanical behavior is relatively close to honeycomb outside honeycomb face Degree is very sensitive, and during compressed in honeycomb face and impact, the mechanical behavior of presentation is honeycomb office caused by honeycomb caves in Portionization deforms；(4) Nomex honeycomb parts are non-linear dimensions, and static compress stress-strain diagram will experience linear elasticity, flexing puts down Platform and the stage of densification three, the shape of honeycomb cell element and arrangement and material in itself performance to compression and ballistics in honeycomb face Can influence larger, with the increase of impact velocity, shape honeycomb shows different deformation patterns, the power-displacement of its shock response Curve contains 4 stages with significantly different feature, for the honeycomb for giving structural parameters, the meeting under different impact velocitys Different deformation patterns are showed, quality control conventional meanses difficult to use ensure.Must could be processed using rotating speed high cutting, The speed of mainshaft must be over 2000r/mim, otherwise be difficult to be cut.Because Nomex honeycomb cell elements direction is antarafacial direction, In depth parallel surface, the performance that cellular material is showed is referred to as coplanar performance；Stress face is not or not the face parallel to it Densification strain when planted agent is changed into that densification starts on in-plane direction, coplanar yield strength and its coplanar the plasticity stress that caves in make Obtaining honeycomb core honeycomb parts has the labyrinth of the two-way laying in holotype face.To ensure the type face quality after processing, must in processing Must be cut using Five Axis.In process, Nomex honeycomb parts are if the immersion of greasy dirt or coolant etc., it will Cause degumming phenomenon occur in follow-up Bonding Process, therefore machining tool must have perfect oil-proof device, just can guarantee that The normal process of NOMEX honeycomb parts.In Nomex honeycomb process, especially during roughing, due to cutting output Greatly, producing substantial amounts of honeycomb fragment and dust, these comminuted fibres and resin dust can produce greatly harm to human body.This A little dust invade the lubricating system of high-precision Digit Control Machine Tool, seriously threaten the life-span of lathe.Produce the main cause of dust It is：The honeycomb that the top sawtooth cutting knife part of honeycomb processing combination milling cutter will cut off is crushed.To avoid dust etc. right The influence of its former part must carry the specialized high-speed honeycomb milling of totally-enclosed protector and complete dust exhaust apparatus, to prevent A large amount of toxic dusts that work in-process is produced produce harm to operator, surrounding environment and process equipment.Nomex honeycomb cores zero Part is in Milling Process, and comb core is high along the axial strength of cell, and transversal stretching is big, under the effect of coplanar compressive load easily By conquassation, the deformation of linear elasticity, plastic yielding, platform area and densification typically can successively occur, cause the rake face pair of cutter There is extruding, friction in workpiece, the Cutting Tool Failure Mechanism of this extruding force, frictional force and its generation can cause the change of honeycomb core lattice Shape is collapsed.The principal element for determining cellular material energy absorption capability is the densification strain of honeycomb lattice porous material stress.This Plant characteristic and cause that category comb core has cutting energy-absorbing effect very high.Because the coplanar peak stress of metal beehive core is tied with it Structure parameter is relevant with the impact velocity of cutter, and the elastic deformation that cutter is initially entered is small, and energy absorption is few, when stress reaches first During initial spike, corresponding initial strain starts closely knit, the energy that densification absorbs when deforming after entering platform area, platform area Also it is few.When stress is sharply increased, energy absorption concentrates on platform area, and dynamic peak stress in platform area adds during cutter attack Acute densification strain and the energy absorption of unit volume densification.Nomex honeycomb cores are by rigidity is low, toughness is strong aramid fiber paper wood Expect the thin-wall construction for constituting, cuttability is poor, cracky, the particularity of these honeycombs processing makes its machinability poor, in processing In easily there is tear, be collapsed, the deformation of core lattice, burr, the defect such as profile defect, work in-process cutter is easy to wear, in addition realization height The equipment of speed impact is costly, and impact mechanical performance limitation is too strong, it is difficult to find suitable processing method.Therefore, honeycomb core Design feature and mechanical property determine that the processing of honeycomb core must use special cutter.The structure of cutter, cutting ability and Its processing sequence is extremely important.To solve the problems, such as that honeycomb core cannot laterally bear cutting force, traditional processing method is in processing Generally herringbone is used during Nomex honeycomb core parts from a kind of special double helical tooth carbide-tipped milling cutter combination milling honeycomb cutter Tooth milling cutter or so interlaced helical effect suppresses burr, and intersects tooth milling cutter then because cutter sharpness is poor, causes its clasticity to be worse than Water chestnut tooth milling cutter.Additionally, conventional knife also has waveform Cone Disc to return slitting milling cutter, circular peripheral-mill with teeth and anodontia time slitting milling cutter.Mesh Preceding conventional tool type is used and forms gang tool by handle of a knife, cutterhead and blade unit, wherein, participate in only cutting off for cutting The angle of wedge of honeycomb blade, cutting knife serrated portion and blade, the helical angle and anterior angle and relief angle of cutting knife sawtooth.Handle of a knife is not involved in cutting Cut, cutterhead helical edges are mainly used to smash honeycomb.In honeycomb working angles, the plastic deformation ability of workpiece, the rake face of cutter with Friction between chip and rear knife face and workpiece machined surface can be converted into heat, and these heats are between workpiece and cutter Conduction, is radiated between air, and cutting stress interacts with thermal stress, influences each other, and is a close coupling process.Honeybee The thermal conductivity factor of nest is smaller, and heat main conduction is raised to cutter, tool temperature, influences cutting-tool's used life.Honeycomb core Technological method for processing mainly using first in whole honeycomb Curve Machining type face roughing, unnecessary cellular material is removed, stays about 2mm Surplus carry out last layer finishing.It is general during milling to be cohered in frock honeycomb core using double faced adhesive tape, i.e., in honeycomb core And Nomex honeycomb parts non-processing face and frock between spread one layer of two-sided tape, then using circular peripheral-mill by honeycomb core pattern Face and contour machining are in place.Using this traditional honeycomb class processing method, often often there is thin-walled and be pulled up, produced Phenomenon is cut, so as to cause scrapping for honeycomb core.Its main cause：1st, honeycomb class thin-walled Nomex honeycomb parts in process, When cutter successively processes the big surplus of removal, a large amount of dust can be produced, dust falls can be to the stickiness of glue on cellular glue is cohered Have a great impact, cause honeycomb degumming phenomenon；2nd, the cutterhead of honeycomb gang tool be present helical form, and each tooth shape It is trapezoidal, there is to honeycomb core the active force for pulling up when honeycomb is smashed, the active force for pulling up easily causes honeycomb It was pulled up the phenomenon cut.

Traditional machining is the process that a chip is formed and cut off, i.e., material to be processed is subject to cutter rake face Extrude and the process of plastic deformation and then formation chip of the generation based on sliding.Due to the correlation properties of paper honeycomb material, milling Tool wear and milling usage when cutting processing, such as carry out cutter whirler and add by Traditional Thinking, and paper honeycomb will necessarily produce part Knife phenomenon is allowed, so as to produce a large amount of burrs in machined surface.This paper substrate honeycomb design cutting light material cutter block, switches to hair During bubble glue, because foamed glue is loose porous, and pore size distribution is uneven, and foamed glue and the cellular intensity of Nomex are inconsistent, are cut to Closely knit position, cutting force can be raised, and in working angles, chip discharge is uneven, and cutting tool NOMEX honeycombs enter foaming limb During piece, cutting force mutation cutting force increases suddenly and its mutation of cutting force can cause and forge a knife and node comes unglued phenomenon, therefore Uprushing for cutting force is very easy to " forging a knife " phenomenon occur, causes tool failure serious, sometimes even by honeycomb pull-up, causes Nomex honeycomb parts are scrapped.The breakage of cutting tool is mostly caused by cutting foamed glue.Because foamed glue both sides are The different Nomex honeycombs of model, and foaming glue-line width it is not strict yet be consistent, the Nomex honeycombs on both sides are that have can Can be honeycomb wall, it is also possible to be honeycomb hole, after this causes that foamed glue is cut, the environment of discharge is different, so same meeting Cause the fluctuation of cutting force, the big ups and downs of cutting force bring certain difficulty for the follow-up cutting of cutting force.NOMEX honeycomb cores It is not as metal material like that, with stronger plasticity, there is viscous friction region.In working angles, position is cut such as Chip can not be formed, necessarily extrude or tear honeycombed become band form winding cutter, further tear green surface and formed The defects such as tear, breach.In order to solve this problem, in engineer applied, using the band that cutting edge is consistent with cut direction all the time Rotary cutter cutting edge is sawed, paper honeycomb material is processed, is cutting of the linear cutter to material by extruding, cut off honeybee lattice and complete to add Work.Because the cutting speed of band saw is low and saw blade has vibration, the honeycomb surface of processing is second-rate, and burr is still a lot.Burr The follow-up bonding effect of honeycomb can be influenceed, it is necessary to manual polishing is processed.And application surface with saw is limited, for complex outline and The honeycomb in type face cannot be processed.The cutting that cutter rotation is completed can not make the honeycomb for scaling off become chip, big running into When area Nomex honeycomb parts need multipath to process, the advance of cutter can be interfered, the honeycomb for scaling off even can wind master Axle.

The forming method of paper substrate honeycomb core part is mainly and uses high-rate wireless LAN, the paper honeycomb in high-rate wireless LAN There are fixing hardly possible, three big difficult points of cutting ability difference and easy tear in the machining of core.The product percent of pass of paper substrate honeycomb core part It is very low.Holding method employed in high-rate wireless LAN process is all different degrees of to have used binding material.It was verified that The fixing stability and reliability of existing holding method are poor, and reliable fixing paper substrate is unable to reach in high-speed milling forming process The purpose of comb core material.The processing of Nomex honeycomb core NOMEX honeycomb parts has very typical technological process.In Nomex honeybees In nest core Nomex honeycomb parts typical process flows, the situation of the fixing of Nomex honeycomb core parts decides Nomex honeycomb cores Nomex honeycomb parts state in process, if fixing state is undesirable, it will occur in process de- glutinous existing As and cause the situation of Nomex honeycomb core pull-up cut wounds, the requirement honeycomb core of Nomex honeycomb core patterns face frock is held with adhesive tape On backing plate, it is mainly comprised the following steps：1. backing plate or type face frock surface are cleaned；2. two-sided tape is layered on backing plate or type face frock Surface；3. honeycomb core is placed on backing plate or type face frock；4. because Nomex honeycomb cores part is full moulding surface structure, and Nomex honeycomb cores are a kind of flexible deformable material, therefore its positioning datum fully relies on type face frock.To ensure and follow-up glue Comparison check state during state is connect, it is necessary to set up analog quantity while digital quantity is measured after retaining honeycomb core digital control processing The profile clamp of inspection, continuous, the fairing in honeycomb core pattern face are ensured using double control measure, more can intuitively be controlled again The honeycomb core that system is paid close attention to when being subsequently glued is highly.

Working research of the country on honeycomb is mostly concentrated in climb cutting method at present, is with theoretical and experiment mainly The method that master determines cellular material items dynamic and static mechanical properties and machined parameters.Main approaches have experimental method and FInite Element.Using the Laws of Mechanics problem of the Research on experimental methods coplanar compression of double thickness cellular material.Carried for dynamic impulsion The upmilling method of the anti-convention of comb core mechanical property is almost reported without pertinent literature under lotus.《Electromechanical machinery》Figure classification Number：TP242 Document codes：A articles are numbered：151-5519 (2015) 10-0224-021 outlines, the limited public affairs of Shanghai aircraft manufacturing In the mechanical processing technique analysis document of aramid fiber paper honeycomb core disclosed in department Wang Lun, disclose to aramid fiber paper honeycomb core cutting force point Solution and chip produce process analysis, disclose according to theoretical research, with reference to practice analysis honeycomb process when fixing scheme it is excellent The result of study of shortcoming, it is believed that climb cutting is better than upmilling processing effect, and former piece knife and the former piece knife with grinding bodies can obtain matter Measure preferable honeycomb finished surface.When thinking climb cutting, cutting force with cutter spindle vertical plane in, can be analyzed to two mutually hang down Directly：The power of the Fa opposite with cutter direction of advance, vertically with processing towards material internal Fv power.During upmilling, cutting force exists In cutter spindle vertical plane, two orthogonal power are can be analyzed to：With cutter direction of advance identical Fa, vertically with processing Towards the Fv of material outer, Milling Process honeycomb upmilling can produce the cellular power of tear, and climb cutting then will not, advocate processing Honeycomb selection climb cutting is good.Therefore Nomex honeycomb parts processing sequences be as shown in Figure 5 transverse area 1.-transverse area 6., from upper Successively processing downwards, finally reaches the bottom featheredge 3 in honeycomb Curve Machining type face under.Special honeycomb gang tool is by transverse direction Region 1. upper surface traverse feed, successively carries out milling from the order that 6. 1. transverse area processed to bottom.But helical edges are justified When post milling cutter 12 turns clockwise, the upward component F2 that cutter elevating screw sword cutting force is produced has upward pulling force to honeycomb, Honeycomb featheredge is easily pulled up and milling wound in the presence of pulling force.Due to Nomex honeycombs and the difference of intermetallic composite coating principle, The mechanism of production of the cutting force of Nomex is complicated.In the stress that the climb cutting processing sequence shown in Fig. 5 shows, the knife of milling Nomex The Milling Force for having rotation is made up of two parts, and the cutting force that a part is produced for bottom disc milling cutter, another part is sawed for top Tooth cutting edge crushes the cutting force that honeycomb is produced, and with the difference of cutting output, the ratio of two parts power constantly changes, single to cut The affecting laws for cutting factor are unknown, and the affecting laws between each factor with the presence or absence of interaction can not determine, thus Nomex honeybees The characteristics of cutting force rule of nest is presented complexity, this brings certain difficulty to the data processing of NOMEX honeycombs processing.In knife Tool rotation in cellular force analysis, cellular stress when P points are cutter rotary cutting Nomex honeycomb parts.According to Component excursion is it can be found that in direction of feed Y, the maximum and excursion of P point cutting force are minimum, cutting datas Influence of the change to direction of feed cutting force it is minimum；The maximum and excursion of Z-direction cutting force F2 are maximum, cuttings Influence of the change of consumption to Z-direction cutting force F2 is maximum.Because cutter block in 45 ° of helical edges, perpendicular to feeding Direction and z to direction on mastication forces to be far longer than direction of feed.In X-direction, cutting width is on direction cutting force F1 influences Most significantly and contribute maximum, with the increase of feed speed, cutting force gradually increases.The speed of mainshaft has aobvious to Y-direction cutting force Influence, the raising of the speed of mainshaft, cutting force reduction and the raising of feed speed are write, cutting force has the trend of small size reduction.From From the point of view of the amplitude changed on cutting force each axle, influence of the cutting width to Z-direction power is more notable.It can be seen that, cutting width is to cutting The impact effect for cutting power is greater than the effect of feed speed, and cutting width is the principal element for influenceing cutting force；As cutting is deep The increase of degree, cutting force increase.With the increase of feed speed, the spacing of the contour of cutting width increases, feed speed Increase and cause that influence intensity of the cutting width to Z-direction power is reduced, i.e., both have negative reciprocation.The speed of mainshaft and feed speed Affecting laws to all directions are not quite similar.If simple from the angle for reducing Z-direction cutting force, in selection cutting data When, what is considered first is cutting width, is secondly cutting depth, the influence of feed speed and the speed of mainshaft.They are to change to cut Cut the principal element of force direction.Through initial analysis, this is that Nomex honeycomb milling cutters rotate at a high speed, is formed when cutter is contacted with honeycomb Active force, dynamic shearing force and normal pressure, fiber is cut off in the presence of shearing force, separates chip.In the work of normal pressure Under, the honeycomb wall of lightweight can deform, and the deformation of object is the result that stress is internally transmitted.The transmission speed of stress with The velocity of wave of material has relation.Because honeycomb cutting speed is very high, normal pressure transmission scope is smaller, and carrying with feed speed Height, amount of feeding increase in the unit interval is fast equivalent to the speed that dynamic stress in the unit interval is propagated, and the deformation of material accordingly increases Plus, in the case where cutting speed is constant, the burr of generation will increase.Be can be seen that from theory analysis above cellular Relative deformation actually have with cutting speed and the ratio of feed speed it is certain contact, and cutter helical edges need it is inclined Angle is relevant with the radius of curvature and tool base radius in type face.Because the physical dimension of cutter bottom is larger, in the base of cutting In plane, the axis of cutter can not be conllinear with the radius of curvature of curved surface, but to incline certain angle, otherwise just occurred Cut or leak the phenomenon cut.In addition, when cutter helical edges are inclined, the equivalent helical angle in cutter top can also change.These become Change changes effective cutting parameter of cutter, and influence is produced on cutting force.According to honeycomb manufacturing process characteristics, honeycomb is in face Anisotropy, the concrete moduli with X-direction is different in the Y direction, when cutter feeds along different directions, actual working angles It is different.In working angles, cutting force is not fixed, even if being also have fluctuation in a cycle, because Nomex honeycombs are that Nomex paper bonding is formed, and fiber laying is uneven in the fabrication process for Nomex, and the direction of fiber is also Random.In working angles, the separation of fracture and the chip of fiber is uneven, and cutting force will necessarily produce fluctuation.In addition, cutting When maximum is reached in all end of term, the most acutely, reason probably has the following aspects to power for fluctuation：Honeycomb is by single times of wall thickness transition To double wall thickness, the honeycomb thickness in direction of feed changes and causes the impact of cutter.In working angles, the pressure of honeycomb cardboard Contracting destruction is mainly relevant with the structure of paper honeycomb core and the flexing of honeycomb cell-wall, in cutting edge, when honeycomb core lattice are destroyed The honeycomb wall of cut-out is left, they lose the stress balance under core lattice integrality, perpendicular to the cutting force certainty of honeycomb wall Can produce honeycomb and allow knife, cause surface spikes too many and cutting size is inaccurate.It is by two-layer Nomex at double thickness of honeycomb wall What paper was bonded, gum dipping process more difficult control when bonding, the inhomogeneities of impregnation also results in the fluctuation of cutting force.Circle Wire rod quality is all to cut off bottom, and actual upper side does not cut, so in cutting lay, along honeycomb cell direction, The part of cutting is still linked together with the honeycomb of undressed part, and cut honeycomb cannot be separated.Having added after cutting Work keriotheca is collided with the handle of a knife of circular peripheral-mill, hinders the feed motion of cutter.

Honeycomb is in itself a kind of structural composite material, the processing mode of this structural composite material and traditional mode Difference, is related to many guardian techniques of the multi-crossed disciplines such as materialogy, mechanics, calorifics.Because the processing of Nomex honeycombs is one The individual nonlinear coupling process of extreme, is directed to non-linear, honeycomb geometry the non-thread of Nomex fibrous mechanical properties Property, boundary condition is non-linear in processing, and further relates to strong Thermal-mechanical Coupling, rub, contact problems.For so complicated System-level nonlinear problem, the non-powerful software platform for being absorbed in nonlinear analysis be difficult solve.As being filled primarily with material The honeycomb core Nomex honeycomb parts of material, upper mo(u)ld bottom half face axially is complicated free form surface, it is necessary to carry out two-sided processing. The process technology of Nomex honeycomb core parts is existed and continues to develop perfect process as a kind of new technology.And conventional The geometry of Nomex honeycomb cores is all regular hexagon, selects different milling modes, the direction of Milling Force and decomposes also not phase Together, this is most important for anisotropic cellular material.

The content of the invention

The purpose of the present invention is directed to the prejudice that the weak point and prior art of above-mentioned prior art presence are present, there is provided A kind of milling efficiency is high, and dust is produced in reducing process under existing processing conditions and processing efficiency is improved, and can extend The processing method in the thin-walled honeycomb core Curve Machining type face in cell-specific combination type milling cutter life-span, the method need not introduce elder generation Enter process equipment.

The technical solution adopted for the present invention to solve the technical problems is：A kind of thin-walled honeycomb core Curve Machining type face Processing method, it is characterised in that comprise the following steps：In the process in honeycomb Curve Machining type face, by Nomex honeycombs zero Part blank 2 is retained in frock or backing plate 5 by two-sided tape 4, and static pressure honeycomb blank；Early stage two-sided tape is processed in honeycomb When 4 fixing states are good, use the cell-specific combination milling cutter 7 for returning slitting milling cutter 15 with Cone Disc instead and cut, change honeybee The direction of rotation of nest special combination milling cutter 7, the mode for being changed to rotate counterclockwise is cut by turning clockwise to comb core Cut；Cutter and handle of a knife use 3 °~5 ° of knife swinging angle 10, according to the high speed swivel feeding of tool sharpening type face track 9, Be fade-in from top to bottom vertically perpendicular layer processing district 1., by 1.~6. ... erect layer processing district order successively milling honeycomb Curve Machining type Face；Slitting milling cutter 15 is returned using the Cone Disc of the end face diameter of helical edges cylindrical milling cutter 12 with diameter greater than cell-specific combination milling, Cutting roughing is carried out by the rotate counterclockwise mode of cutter direction of rotation 8；Cone Disc returns slitting milling cutter 15 and initially enters honeycomb song 1., secondly the perpendicular layer processing district on line processing type face thickness direction bottom featheredge top be located at the spiral shell that Cone Disc goes back to the top of slitting milling cutter 15 Rotation sword cylindrical milling cutter 12, with 3 °~5 ° of knife swinging angle 10, rotate counterclockwise enters perpendicular layer processing district 1. top, and milling is justified Cone disk returns slitting milling cutter 15 and has a down dip layer above after beveling seam, using the perpendicular layer processing district of sawtooth sword milling on its helical milling blade 1. Top vertical plane keriotheca, will already switch off part milling and goes out 3 °~5 ° slopes of knife swinging angle 10, will easily be pulled up milling wound, And the most thin vertical plane layer honeycomb cutting profile 1 of featheredge 3 positioned at honeycomb Curve Machining type face bottom is first processed, then, the above State processing mode similarly, successively by 2.~6. ... erect layer processing district order processing subregion, lift processing honeycomb Curve Machining The other parts in type face.

Invention has the advantages that compared to prior art.

Milling efficiency is high.The present invention can not only have been rotated forward according to cutting tool for CNC machine again can with counter-rotating the characteristics of with Honeycomb process tool structure is analyzed, changes the cutting route of Nomex honeycomb parts processing, from unconventional reverse rotation Turn, 1., in process the featheredge in first Processing Curve processing type face takes reverse processing sequence to improve machining accuracy and surface Quality, after 1. the perpendicular layer processing district of featheredge process, by thickness direction successively by 2.~6. ... erect the processing point of layer processing district order Area processing honeycomb Curve Machining type face, lift successively processes the processing sequence of other parts, adds to the honeycomb curve for being difficult milling wound The webbing region processing in drum face, improves processing efficiency, reduces processing loss, by 3 ° in process~5 ° of cutter Pivot angle 10 has reached the effect that honeycomb Curve Machining type face featheredge is difficult to be pulled up and milling is hindered to cellular pressure.With circular cone Disk returns the increase of the cutter angle of wedge of slitting milling cutter 15 wedging, the longitudinal direction extruding of the vertical honeycomb bar that helical edges cylindrical milling cutter 12 pairs has cut Shear action strengthens, and cutter incision width, depth increase, and the perpendicular layer processing district of milling is completed using the sawtooth sword on helical milling blade 1. top vertical plane keriotheca, not only milling efficiency is high, and dust is few, improves effect and passing rate of processing, and solve honeycomb The problem that Curve Machining type face featheredge is easily pulled up and milling is hindered.

Overcome prior art climb cutting prejudice better than upmilling processing effect.And former piece knife and the former piece knife with grinding bodies can be obtained Obtain the preferable honeycomb finished surface of quality.The present invention is changed to inverse using cell-specific combination milling cutter by the cutting that turns clockwise The mode of hour hands rotation is cut comb core, and cutter and handle of a knife are using 3 °~5 ° of knife swinging angle 10；According to cutter plus The high speed swivel feeding of drum face track 9, be fade-in from top to bottom vertically perpendicular layer processing district 1., by 1.~6. ... erect layer processing district sequentially Successively milling honeycomb Curve Machining type face, cell-specific combines milling cutter with 3 °~5 ° of knife swinging angle, rotates counterclockwise into Enter milling by Cone Disc return slitting milling cutter 15 have a down dip beveling seam after perpendicular layer, added using the sawtooth sword milling on its helical milling blade Work area 1. top vertical plane keriotheca, will already switch off part milling and goes out 3 °~5 ° slopes of knife swinging angle 10, equivalent to by Between the triangle vertical plane honeycomb bar and joint-cutting of the top keriotheca that Cone Disc is returned after the inclined cut of slitting milling cutter 15, one is formd The tension force cantilever of the chock shape of triangle vertical plane honeycomb bar, Cone Disc returns the incision of slitting milling cutter 15 so that unprocessed honeycomb is more Easily it is broken by the sawtooth sword milling of helical edges cylindrical milling cutter 12, this at the two ends of object just as adding external force so that object more holds The same efficiently remarkable result is easily cut by the milling of sawtooth sword.When Cone Disc returns 15 cutter rotate counterclockwise of slitting milling cutter, overcome Cutter upwards pressure to honeycomb.The milling delta-shaped region of 3 °~5 ° of knife swinging angle pressure initiation, can protect honeycomb bent Line processing type face featheredge is not pulled up, and reduces the breakage of honeycomb Curve Machining type face featheredge.With the increase of feed speed, enter Improved to speed, three cutting force in direction can all be reduced, the time required for unit length of cut shortens.Helical edges cylinder milling The cutter of knife 12 and by Cone Disc return slitting milling cutter 15 have a down dip beveling seam honeycomb bar between friction reduce.Honeycomb Curve Machining type Face is after most featheredge is processed, using operation is simple and only need to be in machining area sticking two-faced adhesive tape band, during preparation before processing Between greatly shorten.

Reduce the dust produced in process.The present invention uses hard alloy screw sword slotting cutter first, and honeycomb is tried Sample is milled into depth for 10mm, and separation is a series of groove of 10mm, then uses cell-specific combination milling cutter instead, uses Cone Disc returns slitting milling cutter 15 and carries out milling, and lathe returns the groove lateral shift Irma that slitting milling cutter tool center always processes, working angles In, chip is monoblock type vertical plane honeycomb bar, and using slitting milling cutter is returned, oneself is automatically separated cutting honeycomb bar, and very small amount is crushed, almost Dust, honeycomb bar two somewhat warpage are not produced, and dust problem can be significantly improved.Secondly by change processing sequence, Adhesive tape is held into state labile, often easily the honeycomb Curve Machining type face featheredge region of pull-up first processes in place, avoids A large amount of accumulation of dust cause degumming phenomenon after processing a period of time, reduce the quality in Nomex honeycomb parts process Hidden danger, can be greatly enhanced fixing efficiency.Because sticking area area is small, almost seldom there is one piece of two-sided tape not enough Situation, is so considerably reduced the butted part between adhesive tape and adhesive tape.Therefore under current Milling Parameters, in roughing In this operations for needing largely remove materials, using the perpendicular layer of sawtooth sword milling on its 30 °~45 ° pitch helical milling cutter swords Processing district 1. top vertical plane keriotheca, milling goes out 3 °~5 ° slopes of knife swinging angle 10, will easily be pulled up milling wound, and be located at The most thin vertical plane layer honeycomb cutting profile 1 of the featheredge 3 of honeycomb Curve Machining type face bottom is first processed, then, with it is above-mentioned similarly Processing mode, successively by 2.~6. ... erect layer processing district sequential partition processing honeycomb Curve Machining type face, lift processes other Part, this material of roughing removes more operation, and 30 °~45 ° pitch helical milling cutter swords are with larger helical angle reality The anterior angle of increase reduces cutting force, and the abrasion of anterior angle particle is slowed down to a certain extent, and cut-out rate is significantly improved, and burr becomes short And it is dilute, honeycomb core strip is short and neat, and honeycomb is also not yet damaged, is nearly free from burr.Can solve the problem that Nomex honeycombs are processed In many of dust endanger big problem.Low cost, effect are obvious.Current many enterprises are solved in order to ensure featheredge processing Crudy, introduces expensive ultrasonic wave processing equipment, has saved substantial amounts of cost, and cost-effective effect is obvious.

Extend the life-span of cell-specific combination type milling cutter.The present invention is for the splicing Nomex honeybees with foamed glue gap Often occur forging a knife in nest processing, tool failure seriously, the phenomenon such as cutting surface is of poor quality, according to honeycomb Curve Machining type face It is required that, by the way of numerical control programming, using helical edges slotting cutter milling foamed glue gap, use hard alloy screw sword vertical milling Knife processes foamed glue gap first, and hard alloy screw sword slotting cutter has rigidity higher, and cell-specific milling cutter cuts through foaming During glue-line, behind milling foamed glue gap, following process cutter will not encounter foaming glue-line and the phenomenon forged a knife and cutter occur broken Serious situation is damaged, cutting force would not uprush, this just greatly extends Nomex Paper Honeycomb Parts, cell-specific combination In the life-span of formula milling cutter, the surface quality of process and the life-span of cutter are improve, compared to existing technology cell-specific combined type Milling cutter, do not have prior art climb cutting cutting edge to crush machined part, it is to avoid tears phenomenon.Then honeycomb processing is used instead special Milling cutter, processes Nomex honeycombs, and cutting force will not be mutated, the situation for unexpected pull-up Nomex honeycomb parts occur.

The present invention is decomposed along honeybee using the angle of wedge of 30 °~45 ° of cutters when cell edge quality is ensured by cutting force The direction of nest Curve Machining type face thickness.In the bottom surface of cutter, knife phenomenon is not allowed, bottom surface burr is less, honeycomb core core lattice are protected Hold intact, state is very stable after honeycomb processing.

Brief description of the drawings

Fig. 1 is the machining sketch chart in thin-walled honeycomb core Curve Machining type face of the present invention.

Fig. 2 is the schematic diagram of Fig. 1 cutters rotate counterclockwise and stress.

Fig. 3 is the organigram of cell-specific combination type milling cutter of the present invention.

Fig. 4 be prior art cutter turn clockwise and its stress schematic diagram.

Fig. 5 is prior art conventional machining sequential schematic.

In figure：1 cutting profile, 2 Nomex honeycomb parts blanks, 3 honeycomb Curve Machining type face featheredges, 4 two-sided tapes, 5 Frock or backing plate, 6 machining areas, 7 cell-specifics combination milling cutter, 8 cutter direction of rotation, 9 tool sharpening tracks, 10 cutters The handle of a knife of knife swinging angle 10,11,12 helical edges cylindrical milling cutters, 13 flat keys, 14 T-shaped seat screw thread ring washer, 15 Cone Discs return slitting milling cutter 16 The circular cone slitting milling cutter angle of wedge.

Specific embodiment

Refering to Fig. 1-Fig. 3.In embodiment described below, according to the present invention, machining tool selects Five Axis High Speed Milling Operation Bed, based on Large Scale Nonlinear finite element software ABAQUS, secondary development is carried out using PYTHON language, writes various honeycomb geometry Modeling and the ABAQUS plug-in units of mesh generation, call ABAQUS kernels, realize the automation of Geometric Modeling and mesh generation.Program Using the processing module of CATIA software sharings, VERICUT modules and VERICUT software developments by NC program verifications during establishment Module, machine tool motion emulation module, path optimizing module, many axle modules, senior lathe characteristic module, entity comparison module and The modules such as CAD/CAM interfaces composition numerical control machining simulation system carries out NC program optimizations.For at present using more combined type Honeycomb processes special-purpose milling cutter, before honeycomb is processed, foamed glue is individually processed first with hard alloy screw sword slotting cutter, will The part grooving to be processed of Nomex honeycomb parts, then returns slitting milling cutter 15 and is cut using Cone Disc, solves cutter block hair Bubble glue causes the serious problem of tool failure.

In the process in honeycomb Curve Machining type face, Nomex honeycomb parts blank 2 is held by two-sided tape 4 In frock or backing plate 5, the upper surface fixing platform that will hold honeycomb core blank material is placed on platen face, and Static pressure honeycomb blank；When the fixing state of honeycomb processing early stage two-sided tape 4 is good, the honeybee that slitting milling cutter 15 is returned with Cone Disc is used instead Nest special combination milling cutter 7, changes the direction of rotation of cell-specific combination milling cutter 7, and starting procedure carries out milling, The mode for being changed to rotate counterclockwise by the cutting that turns clockwise is cut comb core；Cutter and handle of a knife are using 3 °~5 ° Knife swinging angle 10, according to the high speed swivel feeding of tool sharpening type face track 9, is fade-in vertically perpendicular layer processing district and 1., presses from top to bottom 1.~6. ... erect layer processing district order successively milling honeycomb Curve Machining type face；Using with diameter greater than cell-specific combination milling The Cone Disc of the end face diameter of helical edges cylindrical milling cutter 12 returns slitting milling cutter 15, enters by the rotate counterclockwise mode of cutter direction of rotation 8 Row cutting roughing；Cone Disc returns slitting milling cutter 15 and initially enters the perpendicular of honeycomb Curve Machining type face thickness direction bottom featheredge top 1., secondly layer processing district be located at the helical edges cylindrical milling cutter 12 that Cone Disc goes back to the top of slitting milling cutter 15, with 3 °~5 ° of knife swinging angle 10, rotate counterclockwise enters perpendicular layer processing district 1. top, and milling is had a down dip by Cone Disc time slitting milling cutter 15 and chamfers above after seam Layer, layer processing district 1. top vertical plane keriotheca is erected using the sawtooth sword milling on its helical milling blade, will already switch off part milling 3 °~5 ° slopes of knife swinging angle 10 are cut out, milling wound will be easily pulled up, and positioned at the thin of honeycomb Curve Machining type face bottom The most thin vertical plane layer honeycomb cutting profile 1 in side 3 is first processed, then, with above-mentioned processing mode similarly, successively by 2.~6. ... The processing subregion of perpendicular layer processing district order, the other parts in lift processing honeycomb Curve Machining type face.

It is special for the general-purpose platform and platform surface of the Nomex honeycomb core parts of plane that fixing platform only has fixing bottom surface Two kinds of the special fixing platform in type face, general-purpose platform can be selected for processing during first type face, be all type face for two sides Nomex honeycomb parts, processing second type face when, can use second special fixing platform, it may be necessary to from lead to With the strong magnetic platform of property.Fixing technique has two-sided band fixation, polyethylene glycol holding method, vacuum suction fixing method and is based on One of four kinds of holding method of magnetic field and tribology principle, the present embodiment is from two-sided band fixation.Although two-sided band fixation The fixing power of offer is smaller, often occurs fixing power deficiency, honeycomb Curve Machining type face honeycomb quilt in honeycomb cuts process Pull-up defect, because the operation of double-sided adhesive tape method and principle are fairly simple, glues it can be considered to the one side using two-sided tape Knot honeycomb bottom surface, a face bonding tool platform is realized fixing, and Nomex honeycomb parts blank 2 is retained on into work by two-sided tape 4 On dress or backing plate 5, static pressure is carried out 30 minutes to honeycomb blank by sandbag.The holding method master of honeycomb core Nomex honeycomb parts To depend on the size of honeycomb core Nomex honeycomb parts.During the holding method of use, however not excluded that polyethylene glycol holding method With the holding method based on magnetic field and tribology principle, or when honeycomb core total area is relatively large, machining area is still Using two-sided gemel connection Nomex honeycomb parts and workbench, non-processing region upper surface covers thin film, by the suction of vacuum Attached power completes the fixing to Nomex honeycomb parts.

In the process of honeycomb core, the honeycomb blank (2) being retained on frock or backing plate (5) is carried out with sandbag first As many as the static pressure of 30 minutes；After honeycomb blank (2) static pressure, with hard alloy screw sword end mill tool in layer to be processed, cut out Width is more than or equal to helical edges endmill arbor diameter, and a series of separation W is less than or equal to helical edges slotting cutter radius R's Grooving.

Cone Disc returns anodontia cutter blade of the roughing of slitting milling cutter 15 from 30 °~45 ° of the angle of wedge, the profile in finishing passes Processing and the processing of type face cut stone blade to pieces from gold.

In order to solve the problems, such as that cutter block processing foamed glue causes tool failure serious, according to honeycomb Curve Machining type face Requirement, by the way of numerical control programming, foamed glue, honeycomb core are individually processed with whole hard alloy helical edges slotting cutter The face of Nomex honeycomb parts first after centering, Nomex honeycomb parts is retained on backing plate on the basis of piece line and blank border Nomex honeycomb parts on the basis of the type face that the second face is processed when processing by the first face, are retained on special type facing cut by processing On folder, using helical edges slotting cutter milling foamed glue gap；After processing foamed glue gap finishes, use instead and return piece milling with Cone Disc The cell-specific combination milling cutter 7 of knife 15 is cut, grooving lateral shift Irma from lathe center to processing, handle of a knife along Grooving direction with 3 °~5 ° of knife swinging angle 10, by 1.~6. ... erect layer processing district processing subregion order and carry out milling.

The cutter parameters of hard alloy screw sword slotting cutter select disk diameter D40mm-501mm, shank diameter D8mm- 13mm, the total height of cutter is 50-70mm.In order to ensure that cutting width once is at least a honeycomb cell, cutting depth Maximum be not more than the height of selected knife handle and the difference of its clamped height, cutting depth is 5mm-30mm, and cutting width is big In 5mm.The part to be processed of honeycomb milling NOMEX honeycomb parts is whittled into depth at least 10mm, separation by helical edges slotting cutter The a series of grooving of at least 10mm, then uses Cone Disc time slitting milling cutter 15 instead and is cut, and lathe center is to the groove processed Lateral shift Irma, handle of a knife feeds along grooving direction, and by rotating at a high speed, Cone Disc returns slitting milling cutter to feeding disk milling keriotheca 15 carry out linear slit cutting with the very little angle of wedge to NOMEX honeycombs, and perpendicular layer processing district is cut into the acute angle triangle equivalent to cantilever fine strain of millet Shape honeycomb vertical bar, makes honeycomb that honeycomb be cut off under less deformation and strain rate state higher, can so avoid having added Work keriotheca hinders the feeding of cutter and machined honeycomb Curve Machining type face and undressed honeycomb Curve Machining type face to be difficult to point From problem.When carrying out milling using Cone Disc time slitting milling cutter 15, Cone Disc returns the inverse time that slitting milling cutter 15 presses cutter direction of rotation 8 Pin, feed motion is made while rotation at a high speed along same direction, and cutter is converted into radian around the rotary speed of axis, is constrained Axis non-direction of feed motion translational degree of freedom, by tool sharpening track 9 to honeycomb Curve Machining type face featheredge region 1. Carry out coarse-fine processing, the bottom Cone Disc of rotation returns slitting milling cutter 15 along honeycomb cell direction by honeycomb Curve Machining type face at a high speed Nomex honeycomb cores, by the cut-out of honeycomb Curve Machining type face bottom fiber, make the material in machining enter Large strain and are answered with high There is elastic deformation and its plastic deformation in the stage of variability, until final cut staple separates cut honeycomb chip, cut Cut and do not produce dust.Cone Disc is gone back to the trigonum that slitting milling cutter 15 cuts off by honeycomb processing combination milling tool blade end serrated portion Honeycomb is crushed, it is to avoid the triangle banding honeycomb bar after cut-out hinders feed motion and the processing part winding main shaft of handle of a knife.It is coarse-fine N=3000 revs/min of -20000r/min of process tool rotary speed, f=1200mm revs/min of feed speed；Cone Disc returns slitting milling cutter The rotating speed of 15 disc knives processing can be 333r/s, the radius R=30mm of disc knife, maximum static friction factor μ=0.5；In order to Ensure that cutting width once is at least a honeycomb cell, the maximum of cutting depth is not more than the height of selected knife handle And the difference of its clamped height, cutting depth is 5mm-30mm, cutting width is more than 5mm.

Refering to Fig. 4.Cell-specific combination milling cutter 7 is included on the handle of a knife 11 and cylinder circumference of forward and reverse T-shaped pairing The helical edges cylindrical milling cutter 12 of spiral inclination cutting edge is formed with, and is stretched from the helical edges cylindrical milling cutter bottom end face stepped hole Enter, the interchangeable circular cone slitting milling cutter 15 connect by the Luo of T-shaped seat screw thread ring washer 14, wherein, helical edges cylindrical milling cutter 12 passes through flat key 13 Connect firmly on the T-shaped cylinder of handle of a knife 11, and sawtooth sword is formed with the described cutting edge of spiral inclination cutting edge 12.

The present invention illustrates and shows referring specifically to preferred embodiment, it should be understood by those skilled in the art that can be Remodeling is made in form and in content without departing from spirit and scope of the invention.

Claims (10)

1. a kind of processing method in thin-walled honeycomb core Curve Machining type face, it is characterised in that comprise the following steps：It is bent in honeycomb In the process in line processing type face, Nomex honeycomb parts blank (2) are retained on frock or backing plate by two-sided tape (4) (5) on, and static pressure honeycomb blank；When honeycomb processing early stage two-sided tape (4) fixing state is good, uses instead and return piece with Cone Disc The cell-specific of milling cutter (15) combines milling cutter (7) and is cut, and changes the rotation side of cell-specific combination milling cutter (7) To the mode for being changed to rotate counterclockwise by the cutting that turns clockwise is cut comb core；Cutter and handle of a knife using 3 °~ 5 ° of knife swinging angle 10, according to tool sharpening type face track (9) high speed swivel feeding, is fade-in vertically perpendicular layer processing district from top to bottom 1., by 1.~6. ... erect layer processing district order successively milling honeycomb Curve Machining type face；Milling is combined with diameter greater than cell-specific Cylinder plate screw-on cutter (12) end face diameter Cone Disc return slitting milling cutter (15), by the rotation counterclockwise of cutter direction of rotation (8) The mode of turning carries out cutting roughing；Cone Disc returns the bottom featheredge thickness that slitting milling cutter (15) initially enters honeycomb Curve Machining type face Direction top Shu Ceng processing districts 1., secondly, will be located at the cylinder plate screw-on cutter (12) on Cone Disc time slitting milling cutter (15) top with 3 °~5 ° of knife swinging angle (10), rotate counterclockwise enters perpendicular layer processing district 1. top, and milling returns slitting milling cutter 15 by Cone Disc Have a down dip layer above after beveling seam, using the sawtooth sword on its helical milling blade, the perpendicular layer processing district of milling 1. top vertical plane honeycomb Layer, will already switch off part milling and goes out 3 °~5 ° slopes of knife swinging angle (10), will easily be pulled up milling wound, and positioned at honeycomb The vertical plane layer honeycomb of featheredge (3) thinnest part of Curve Machining type face bottom cuts profile (1) and first processes, then, with above-mentioned same The processing mode of reason, successively by 2.~6. ... erect the processing subregion of layer processing district order, lift processing honeycomb Curve Machining type face Other parts.

2. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：Nomex honeybees When nest part blank (2) is using holding method, using polyethylene glycol holding method and the fixing based on magnetic field and tribology principle Method, or when honeycomb core total area is relatively large, machining area still using two-sided gemel connection Nomex honeycomb parts with Workbench, non-processing region upper surface covers thin film, completes to consolidate Nomex honeycomb parts by the absorption affinity of vacuum Hold.

3. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：Cell-specific Spiral inclination cutting edge is formed with combination milling cutter (7) handle of a knife (11) and cylinder circumference including forward and reverse T-shaped pairing Cylinder plate screw-on cutter (12), and stretched into from the cylinder plate screw-on cutter bottom end face stepped hole, by T-shaped seat screw thread shelves The interchangeable circular cone slitting milling cutter (15) that circle (14) Luo connects, wherein, cylinder plate screw-on cutter (12) is connected firmly in handle of a knife by flat key (13) (11) sawtooth sword is formed with spiral inclination cutting edge (12) cutting edge on T-shaped cylinder and described.

4. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：Cone Disc is returned Slitting milling cutter (15) roughing angle of wedge be 30 °~45 ° without teeth cutter blade, the rotating speed of processing is 333r/s, the radius R=of disc knife 30mm, maximum static friction factor μ=0.5；In order to ensure that cutting width once is at least a honeycomb cell, cutting depth Maximum is not more than the height of selected knife handle and the difference of its clamped height, and cutting depth is 5mm-30mm, and cutting width is more than 5mm。

5. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：Finished Sharp processing and type face processing in journey cuts stone blade to pieces from gold.

6. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：In honeycomb core Process in, 30 minutes quiet as many as is first carried out to the honeycomb blank (2) being retained on frock or backing plate (5) with sandbag Pressure；After honeycomb blank (2) static pressure, with hard alloy screw sword end mill tool in layer to be processed, cut out width and be more than or equal to Helical edges endmill arbor diameter, groovings of a series of separation W less than or equal to helical edges slotting cutter radius R.

7. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：In order to solve Cutter block processing foamed glue causes the serious problem of tool failure, according to the requirement in honeycomb Curve Machining type face, using numerical control The mode of programming, foamed glue is individually processed with whole hard alloy helical edges slotting cutter, and the face of Nomex honeycomb parts first is with piece On the basis of line and blank border after centering, Nomex honeycomb parts are retained on backing plate and are processed, with the first face when the second face processes On the basis of the type face for processing, Nomex honeycomb parts are retained on special type facing cut folder, using helical edges slotting cutter milling Foamed glue gap.

8. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：Helical edges are stood The part to be processed of honeycomb milling Nomex honeycomb parts is whittled into depth at least 10mm by milling cutter, and separation is at least the one of 10mm The grooving of series.

9. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：Hard alloy The cutter parameters of helical edges slotting cutter select disk diameter D40mm-501mm, shank diameter D8mm-13mm, the total height of cutter It is 50-70mm.

10. the processing method in thin-walled honeycomb core Curve Machining type face as claimed in claim 1, it is characterised in that：Processing hair After bubble glue-line gap is finished, use cell-specific combination milling cutter (7) for returning slitting milling cutter (15) with Cone Disc instead and cut, machine Grooving lateral shift Irma from bed center to processing, handle of a knife along grooving direction with 3 °~5 ° of knife swinging angle (10), by 1.~ 6. ... erecting layer processing district processing subregion order carries out milling.