CN108723725A - A kind of processing method of aerial blade - Google Patents
A kind of processing method of aerial blade Download PDFInfo
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- CN108723725A CN108723725A CN201810366029.XA CN201810366029A CN108723725A CN 108723725 A CN108723725 A CN 108723725A CN 201810366029 A CN201810366029 A CN 201810366029A CN 108723725 A CN108723725 A CN 108723725A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
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Abstract
The invention discloses a kind of processing method of aerial blade, the processing method of the aerial blade is as follows：Multi-layer helical line tracking is constructed using drive surface and shadow casting technique, blank is processed into thick finished product in the way of helical milling forward and back knife, the cutter used in roughing is endless knife；Spiral trajectory is constructed using drive surface and shadow casting technique, thick finished product is processed into semi-finished product in the way of helical milling forward and back knife, the cutter used in semifinishing is the first ball head knife；To originate control line and terminate control line helix is directly constructed as the method for boundary's interpolation, and it is projected along spoon of blade normal direction, ensure that helix is located on semi-finished product curved surface, semi-finished product are processed into finished product in the way of helical milling forward and back knife, it is the second ball head knife to finish cutter used.Aerial blade is processed using above-mentioned technical proposal, high in machining efficiency, precision is high, the surface quality of aerial blade is good.
Description
Technical field
The present invention relates to vane type aeroplane engine field of machining technology, specially a kind of processing method of aerial blade.
Background technology
Aero-engine is one of the determinant of aircraft " heart " and aeroplane performance, even more equipment manufacturing field
Most significant end product, it represents the highest technical merit of equipment manufacture, is known as modern industry " jewel on imperial crown ".Its
Manufacturing technology is to weigh a national science and technology level, military strength, the one of the important signs that of overall national strength.And the property of engine
Energy, service life and parameters are heavily dependent on the design of blade profile and the manufacture level of blade.The spy of blade
Putting is：It is complicated, various in style, geometric accuracy is high, processing difficulties, is difficult to ensure processing quality, and blade is engine
Important component, so the quality of blade processing quality directly determines the performance of engine, since blade needs well
Aerodynamic arrangement and type face, so its manufacture and design period comparable length, typically several times of other parts even tens times, institute
Account for about the half of whole engine labor content with the manufacturing effort of blade.The vane manufacturing enterprise in China is in process
In there are machining accuracies not high, blade processing inefficiency, the empirical problems such as strong.
Invention content
The purpose of the present invention is to provide a kind of processing method of aerial blade, the processing method of the aerial blade specifically walks
It is rapid as follows：
S1：Roughing：Using drive surface and shadow casting technique first from driving solid tectonic forcing point, then driving point along
One specified projected vector direction projects part geometry body, forms incident point.Again from driving solid tectonic forcing point, connect
It driving o'clock and projects part geometry body along a specified projected vector direction, forming incident point, (incident point is in cutter location
Point of contact track or the cutter spacing locus of points are appointed as in calculating), to construct multi-layer helical line tracking, secondly according to helical milling into,
Blank is processed into thick finished product by the mode of withdrawing, and every layer of the amount of feeding is arranged to 2mm, and there are 1mm surpluses, roughing after roughing
Cutter used is endless knife；
S2：Semifinishing：Using drive surface and shadow casting technique first from driving solid tectonic forcing point, point edge is then driven
It a specified projected vector direction and projects part geometry body, form incident point.Again from driving solid tectonic forcing point,
Then driving o'clock projects part geometry body along a specified projected vector direction, and forming incident point, (incident point is in cutter spacing
Point is appointed as point of contact track or the cutter spacing locus of points in calculating), to construct multi-layer helical line tracking, secondly according to helical milling
Thick finished product is processed into semi-finished product by the mode of forward and back knife, half process after there are 0.1~0.2mm surpluses, the knife used in semifinishing
Tool is the first ball head knife；
S3：Finishing：To originate control line and terminate control line helix, and edge are directly constructed as the method for boundary's interpolation
The projection of aerial blade curved surface normal direction, ensures that helix is located on semi-finished product curved surface, it will be partly in the way of helical milling forward and back knife
Finished product is processed into finished product, uses straight line axial direction motion mode in forward and back knife section start, it is the second bulb to finish cutter used
Knife.
Preferably, processing method is implemented on DMU 60mono BLOCK type numerical control machine tools, using Itnc530
Digital control system controls DMU 60mono BLOCK type numerical control machine tools.
Preferably, endless knife is constituted for cemented carbide material, diameter：The number of teeth：4, helical angle：30 °, overall length：
72mm, cutting edge are long：55mm.
Preferably, the first ball head knife is constituted for high speed steel material, diameter：The number of teeth：4, helical angle：30 °, overall length：
63mm, cutting edge are long：19mm.
Preferably, the second ball head knife is constituted for high speed steel material, diameter：The number of teeth：4, helical angle：30 °, overall length：
57mm, cutting edge are long：13mm.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention using above-mentioned technical proposal to aerial blade into
Row processing, high in machining efficiency, precision is high, the surface quality of aerial blade is good.
Description of the drawings
Fig. 1 is the blade screw track constructed in finishing；
Fig. 2 is helical milling feed schematic diagram；
Fig. 3 is schematic diagram of the interlayer without withdrawing track；
Fig. 4 is the schematic diagram that interlayer has withdrawing track；
Fig. 5 is the blank schematic diagram of aerial blade；
Fig. 6 is the specific chart of cutter of processing；
Fig. 7 is the parameter chart of aerial blade finishing.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Embodiment 1
- 7 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of processing method of aerial blade, the aerial blade
Processing method be as follows：
S1：Roughing：Using drive surface and shadow casting technique first from driving solid tectonic forcing point, then driving point along
One specified projected vector direction projects part geometry body, forms incident point.Again from driving solid tectonic forcing point, connect
It driving o'clock and projects part geometry body along a specified projected vector direction, forming incident point, (incident point is in cutter location
Point of contact track or the cutter spacing locus of points are appointed as in calculating), to construct multi-layer helical line tracking, secondly according to helical milling into,
Blank is processed into thick finished product by the mode of withdrawing, and every layer of the amount of feeding is arranged to 2mm, and there are 1mm surpluses, roughing after roughing
Cutter used is endless knife；
S2：Semifinishing：Using drive surface and shadow casting technique first from driving solid tectonic forcing point, point edge is then driven
It a specified projected vector direction and projects part geometry body, form incident point.Again from driving solid tectonic forcing point,
Then driving o'clock projects part geometry body along a specified projected vector direction, and forming incident point, (incident point is in cutter spacing
Point is appointed as point of contact track or the cutter spacing locus of points in calculating), to construct multi-layer helical line tracking, secondly according to helical milling
Thick finished product is processed into semi-finished product by the mode of forward and back knife, half process after there are 0.1~0.2mm surpluses, the knife used in semifinishing
Tool is the first ball head knife；
S3：Finishing：To originate control line and terminate control line helix, and edge are directly constructed as the method for boundary's interpolation
The projection of aerial blade curved surface normal direction, ensures that helix is located on semi-finished product curved surface, it will be partly in the way of helical milling forward and back knife
Finished product is processed into finished product, uses straight line axial direction motion mode in forward and back knife section start, it is the second bulb to finish cutter used
Knife.
Processing method is implemented on DMU 60mono BLOCK type numerical control machine tools, using Itnc530 numerical controls system
System controls DMU 60mono BLOCK type numerical control machine tools.Endless knife is constituted for cemented carbide material, diameter：The number of teeth：4, helical angle：30 °, overall length：72mm, cutting edge are long：55mm.First ball head knife is constituted for high speed steel material,
Diameter：The number of teeth：4, helical angle：30 °, overall length：63mm, cutting edge are long：19mm.Second ball head knife is constituted for high speed steel material,
Diameter：The number of teeth：4, helical angle：30 °, overall length：57mm, cutting edge are long：13mm.Operate S1：Helical milling forward and back knife track structure
Make method.
When cutter cuts workpiece, many parameters of control lathe are needed, such as：Cutting data, the speed of mainshaft of cutter
And the direction of motion, it is in order to which cutter, lathe and workpiece do not interfere in this way, this section of track of cutter incision workpiece claims in NC programmings
For feed track, correspondingly, the track that cutter cuts out workpiece is known as withdrawing track.
The characteristics of feed track is slowly uniformly to be cut along Cutting trajectory tangential direction, cut out workpiece；Common feed
Mode have rectilinear tangential, circular arc tangential, vertical, oblique line, shape, spiral feed etc., withdrawing mode has rectilinear tangential withdrawing, straight
Line withdrawing etc..
Vertical feed：This tool feeding method is directly vertically to cut workpiece by cutter, will produce great impact power, and make
The deflection for obtaining cutter and workpiece increases, and this method is generally used for cotter mill cutter；
Oblique line feed：This feed mode is to use side edge cutting workpiece, adds man-hour requirement setting tool axis and workpiece
Between angle；If angle setting is too small, the depth of each cutter incision is shallower, is conducive to protect cutter and workpiece,
But processing efficiency can be very low；If the angle chosen is excessive, the case where end sword is cut just will produce；So this angle
To be arranged according to actual processing needs；
Shape feed：This feed mode is the improvement of oblique line feed, and it is small that entire oblique line feed is divided into many steps
Oblique line feed, although the problem of also having cutter both sides blade discontinuity, each walking journey very little, so deformation
It is small；
Spiral feed：This feed mode is to process from inside to outside, that is, since topmost, downward spiral is processed,
It uses the mode of Continuous maching, is easier to ensure machining accuracy, and the smaller depth of cut, cutter can be utilized to decline
Slowly, the generation for avoiding inclined sword cutting, improves cutting wear；For blade screw milling method, how into choosing
Knife mode is selected, is one of the importance for influencing blade processing quality.If it is considered that if blade processing efficiency, then leaf is controlled
Piece encloses the speed being rotated about axis.If this speed can reach maximum as far as possible, the production efficiency of such blade processing
It will improve a lot.Specifically control method is exactly：When leaf is when cutter cuts workpiece, the rotary shaft velocity of rotation is by zero
It is rapidly increased to maximum.Result in blade screw Milling Machining that there must be oneself unique feed mode in this way, it is hereinbefore to mention
Various feed modes be only appropriate to common process, be not suitable for spiral Milling Machining.And the most rational cut-in manner of helical milling is exactly
Control cutter slowly cuts part along blade profile profile, and it is base so that cutter path is formed blade profile wire shaped around blade
The spiral-shaped envelope of plinth, can not only improve the machining accuracy of blade in this way, moreover it is possible to improve the processing efficiency of blade, such as scheme
Shown in 2, the direction cut out when mode is just cut with cutter is opposite.
Operate S2：Multi-layer helical line tracking building method
Path is divided into starting stage, cutting stage and termination phase according to feed process, and feed is happened at initial rank
Section and cutting stage, withdrawing is happened at cutting stage and termination phase, is known as interlayer into withdrawing in the forward and back knife in cutting stage,
For connecting different Cutting trajectory sections.
Blade processing may use in following situations and arrive multi-layer helical line tracking：
A, blank allowance is larger, and roughing, which needs to be divided into multi-layer helical line, to be processed；
B, roughing and semifinishing cutting output are different, and once-through operation is merged into when using with cutter；
The construction process of multi-layer helical line Cutting trajectory is divided into construction interlayer feed track, constructs this layer of Cutting trajectory, structure
Make three steps of interlayer withdrawing track：
Construct interlayer feed track：If helical milling feed track is divided into n-layer, every layer of thickness of cutting is hi, i=0,1 ... n,
Cutter slowly cuts part along blade profile profile, forms the helix shape based in blade profile wire shaped, cutting
The setting of thickness array hi can be easily achieved the thickness even variation of every layer of feed track.
Construct current layer spiral cutting track：If current layer cutting depth is uniform equal thickness, it is only necessary to by spoon of blade
It is biased for cutting depth according to distance, screw processing track is constructed on biasing surface.If current layer cutting depth is not
When uniform thickness, then needs to formulate non-uniform offsetting algorithm construction curved surface, current layer screw processing is then constructed on biasing surface
Track.
Construct interlayer withdrawing track：For multi-layer helical line processing method, mode there are two types of withdrawing tracks is selected, the first
In view of processing efficiency, without withdrawing, but next layer of feed (Fig. 3) is directly carried out, omits withdrawing step, then adjacent two layers
The direction of feed of helical trajectory is opposite.Another kind does not omit withdrawing step, is added and moves knife instruction, can arbitrarily select access site
(Fig. 4).When constructing multi-layer helical line tracking, it can also be variate that every layer of thickness, which can be definite value, be cut according to actual
Situation is cut to determine every layer of thickness of cutting.
Operate S3：The construction of blade screw line
In parameter field helix is directly constructed in the method for interpolation：The most basic method for constructing helix shape is to join
Number field constructs helix, and principle is that the parameter point of proper sequence is selected in Surface Parameters domain, and spiral is constructed in a manner of interpolation
Line.Helix is directly constructed in the method for interpolation in parameter field, concrete principle is as follows：If blade curved surface is indicated with spline surface
For S, u parametric directions are defined as along the direction of blade profile line, parameter field direction v ginsengs are defined as along the direction of blade radial line
Number.Value range in S is typically canonicalized as [0,1].If blade curved surface S and tenon end face and blade tip end and intersection distinguish
For C0And C1, then the effective coverage boundary of blade curved surface is by C0And C1Two intersections determine, in order to make helix after m is enclosed from C0
It is transitioned into C1, the u parameter lines race T such as can construct on S:{Ti, i=1 ... n }, to C0And C1Two intersections carry out again discrete.If
The T and C obtained after discrete0Intersection point collection be combined into P：{Pi, i=1 ... n }, T and C1Intersection point collection be combined into Q：{Qi, i=1 ... n }.If
The T mesh node collection obtained after m deciles is combined into L using P and Q as boundary：{Lij, i=1 ... n, j=1 ... m, wherein L0i=
Pi, Lmi=Qi, then it is located at the i-th row on helix, the grid interpolation value point A that jth arrangesij(u, v) can using following two formula come
It calculates：
A dextrorotary helix and a helix to anticlockwise can be obtained according to formula above, according to first u
The sequence of v afterwards makes two parameters be incremented to 1 from 0 respectively, calculates all interpolation point Aij(u, v).Then, it is linked in sequence
All points, you can generate a continuous broken line in parameter field, the broken line corresponded in the model space blade it is bent and
C0And C1The helix of Rotating with Uniform inside domain.The method advantage of construction helix is that calculating speed is fast in parameter field, algorithm letter
Single, the disadvantage is that this algorithm is only used for individual closed surface, the shape of helix is also relatively simple, is not suitable for construction with good
The complicated shape helix of good craftsmanship.
Helix is constructed based on drive surface and shadow casting technique：In numerical control programming, a kind of programmed method is to utilize driving
Face and shadow casting technique construct machining locus shape, and the process of this programmed method is：First from driving solid tectonic forcing point, connect
It driving o'clock and projects part geometry body along a specified projected vector direction, form incident point.Incident point is in cutter location
Point of contact track or the cutter spacing locus of points are appointed as in calculating.The advantages of this programmed method is that very flexibly, driving solid can be with
It is appointed as overlapping with processing curve, can also be the solid unrelated with processing curve, the selection of projecting method is even more a variety of more
Sample both may be selected to be fixed vector direction or the relevant direction vector of cutter shaft, can also be and the relevant vector of drive surface.It is this
Flexible programmed method is suitable for three axis, multiaxis programming technique, is the important method of numerical control programming.The more flexible property of this method, has
The control helix shape of effect.The key of sciagraphy construction helix is to select driving solid and projection pattern, the present invention
Using cylinder as driving solid, construction is suitable for the blade screw line contact locus of points of Four-axis milling according to the following steps：
A, construction cylinder is as drive surface.Cylinder should completely include blade, and the radius of cylinder can be arbitrary；
B, circular helix is constructed on the cylinder.The equation of circular helix, optional parameters be screw pitch, direction of rotation,
Initial position etc.；
C, it projects.Reference point on circular helix is starting point, crosses the vertical plane that reference point makees cylinder axis, vertical plane with
The intersection point of cylinder axis is projection terminal, and it is subpoint to project with the intersection point of blade；
D, blade screw line is constructed, the subpoint that is linked in sequence can construct blade screw line, region between adjacent projections point
Interpolation or parameter field interpolated value can be used.
Plane, which is asked, hands over segmented construction blade screw line：It, may sometimes for blade local shape is ensured in numerical control programming
It is required that the helix shape in this region meets particular/special requirement.The shape of edge head is one of blade processing requirement, for the ease of craft
Relief grinding edge head, it is desirable that the scallop-height after digital control processing at edge head is uniformly and guarantee has edge head shapes, this requires edge head
Track is similar to edge head section line, is difficult to meet this requirement using common programmed method.Here is to seek friendship technology using plane
Edge head helix is constructed, the segmented construction blade screw line method of edge head leftover traces shape need is met：
A, auxiliary plane group is constructed.Auxiliary plane group selection is perpendicular to two groups of planes of axis of runner blade, plane in family of planes
Between spacing be all screw pitch h, one group of plane is separated by the spacing of h/2 with another group of plane.
B, set of planes and spoon of blade seek intersection.This two races plane asks friendship that can obtain two races with blade has edge head shapes
Curve group.
C, edge head shapes family of curves is cut out with limitation face.Definition needs to keep the leaf area of edge head shapes, usually used
Plane or curved surface go to limit, and go to cut out the curve group that upper step obtains with the limitation face, obtain the curve of blade profile edge head shapes.
D, two ora terminalis head rail trace curves overlap.Curve after limitation face is cut out is divided into front and back two groups, between two groups of curves
It is overlapped in order, bridging method has blade parameter domain interpolated value or Hermite interpolation mode.
E, curve projection is overlapped.Curve is overlapped if not using parameter field interpolated value method, it is likely that do not fall in blade
On curved surface, therefore overlap joint curve is projected to spoon of blade, projecting direction is chosen as one of overlap joint two hold-carrying of curve arrow or other need
Want mode.
F, it is linked in sequence edge cephalic flexure line and drop shadow curve constitutes blade screw line.Three of the above constructs blade screw line
Method cuts both ways.Parameter field interpolated value method is simple, is easily achieved, but is only applicable to single closed surface, bent at edge head
Wire shaped and edge head section line form variations are larger；Drive surface-projecting method is flexible, easy-to-use, curve shape and edge head at edge head
Section line form variations are also little, but form variations are larger at blade back, leaf basin；Plane, which is asked, hands over segmented construction method to use curved surface
Ask friendship, curve to cut out with plane, curve is to curved surface projection scheduling algorithm, calculation amount is bigger, but helix shape can be complete
Control.Parameter field interpolation value method, drive surface-sciagraphy cannot all well adapt to the big feature of blade profile Curvature varying, only
There is segmented construction blade screw line that could solve the problems, such as this.
Operate S4：The cutting width calculation formula of ball head knife is：
Specifically operation is as follows by the present invention：
What blank was selected is alloy plate material, specification：100 × 70 × 30mm, workpiece material：Aluminium alloy 7075/T651, such as
Shown in Fig. 4.It is vertical always with main shaft that the present invention, which uses four axis spiral Milling Machinings, blank, and the tool that clamping uses is combination
Fixture.One end clamping of blank is on built-up jig, and other one section is to be in cantilever beam state, and the length of cantilever is 70mm, dress
The length of folder is 30mm, and universal built-up jig is vertical with main shaft, and cutter is vertical with workpiece always in process.
Processing method selects the processing method of helical milling, the type of cooling：Emulsion cools down.
The cutter of processing is specifically as shown in Figure 6：
The DMU 60mono BLOCK types numerical control machining center that processing uses German Demaghi (DMG) to produce (is swung
Main shaft B axle, rotary and lifting formula workbench), digital control system is German Heidenhain Itnc530 digital control systems.
DMU 60mono BLOCK Five-axis NC Machining Centers machine tool structures and feature：
The X-axis stroke of the lathe is 630mm, and the stroke of Y-axis is 560mm, and the stroke of Z axis is 560mm, and main shaft belongs to electric master
Axis, SK40 handle of a knifes, the speed of mainshaft is up to 18000rpm/min, oscillating spindle B axle, -120 °~+30 ° of hunting range, swing speed
35rpm/min, workbench are revolution C axis.C axis rotary table diameters 600mm, 360 ° of revolutions.Maximum capacity 500Kg, work
Platform rotating speed 40rpm/min.Maximum machinable a diameter of 650mm of workpiece size, is highly 500mm.Linear axis (X, Y, Z) is quick
Movement speed is 30m/min, and maximum feed speed is 30000m/min, positioning accuracy：P max=0.006mm, resetting essence
Degree：Psmax=0.004mm.With infrared gauge head, has the quick adjustment packages of 3D so as to Quick-return precision setting, there is cutter
Damage testing function.Lathe also has the function of ATC, i.e. processing tasks fast programming parameter selection.It can be according to the actual processing stage
It needs to be switched fast between precision, surface quality and process velocity.
The digital control system of DMU 60mono BLOCK type numerical control machining centers is controlled using three-dimensional Heidenhain iTNC530
System, the digital control system of Heidenhain is always since its friendly man-machine manipulation interface, high speed, high-precision, great surface quality and 5 axis add
Work control function and it is famous.Either milling, brill, boring and processing center machine tool or lathe, Heidenhain are all provided for maturation
Reliable digital control system.
In machining experiment, the roughing and semifinishing of early period are prepared for the contrast test of finishing.Essence
The contrast test of processing is mainly from speed of mainshaft n (r/min), amount of feeding f (mm/min) and back engagement of the cutting edge ap(mm) three sides
What face carried out, and these parameters are the determinations according to lathe parameter.
After determining contrast test, according to the theoretical geometrical model of blade processing under the CAM masterplates of NX7.0, using variable
The processing method of axis streamline, machining programming.In order to ensure the consistency of processing, as long as the program modification wherein main shaft of establishment
Two parameters of rotating speed n (r/min) and amount of feeding f (mm/min), it is other constant.Choose 7 each blanks, respectively label 1#, 2#~
7#, processing contrast test table are as shown in Figure 7.
Aerial blade after being finished to 1#~7# groups using three-dimensional white light scanning instrument is detected, and testing result is specifically such as
Under：
According to the data analysis of test, the surface quality of the blade back of 3# is best, and the occupation rate of the green part of table is institute
Have highest in blade.And in terms of the sections Y, the maximum deviation on the leaf basin surface that can be seen is bigger, is 0.789mm, is
All blade large deviations values are larger.1# blades belong to the testpieces of program, so whether in terms of which aspect, deviation is all
It is maximum in all blades.The surface deviation value of remaining blade is all not much different, and comprehensive all factors, 4# blades are comprehensive
Relatively good one group of property.First, from the point of view of suface processing quality, the maximum deviation on its surface only has 0.256mm, from the section sides X
It is seen to Y cross-wise directions, deviation is also smaller in all blades.Thus 4# is to be processed in all blades relatively successfully
One group.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of processing method of aerial blade, it is characterised in that：The processing method of the aerial blade is as follows：
S1：Roughing：Using drive surface and shadow casting technique first from driving solid tectonic forcing point, then driving o'clock is along one
Specified projected vector direction projects part geometry body, forms incident point, then from driving solid tectonic forcing point, then drive
Part geometry body is projected along a specified projected vector direction at dynamic o'clock, forming incident point, (incident point is in cutter location computing
In be appointed as point of contact track or the cutter spacing locus of points), to construct multi-layer helical line tracking, secondly according to helical milling forward and back knife
Mode blank is processed into thick finished product, every layer of the amount of feeding is arranged to 2mm, there are 1mm surpluses after roughing, used in roughing
Cutter be endless knife；
S2：Semifinishing：Using drive surface and shadow casting technique first from driving solid tectonic forcing point, then driving o'clock is along one
A specified projected vector direction projects part geometry body, forms incident point, then from driving solid tectonic forcing point, then
Driving o'clock projects part geometry body along a specified projected vector direction, and forming incident point, (incident point is in cutter location meter
Point of contact track or the cutter spacing locus of points are appointed as in calculation), to construct multi-layer helical line tracking, secondly according to helical milling forward and back
Thick finished product is processed into semi-finished product by the mode of knife, half process after there are 0.1~0.2mm surpluses, the cutter used in semifinishing is
First ball head knife；
S3：Finishing：Helix is directly constructed as the method for boundary's interpolation to originate control line and terminate control line, and along boat
Empty spoon of blade normal direction projection, ensures that helix is located on semi-finished product curved surface, by semi-finished product in the way of helical milling forward and back knife
It is processed into finished product, uses straight line axial direction motion mode in forward and back knife section start, it is the second ball head knife to finish cutter used.
2. a kind of processing method of aerial blade according to claim 1, it is characterised in that：Processing method is in DMU
Implemented on 60mono BLOCK type numerical control machine tools, using Itnc530 digital control systems to DMU 60mono BLOCK types
Numerical control machine tool is controlled.
3. a kind of processing method of aerial blade according to claim 1, it is characterised in that：Endless knife is hard alloy material
Material is constituted, diameter：The number of teeth：4, helical angle：30 °, overall length：72mm, cutting edge are long：55mm.
4. a kind of processing method of aerial blade according to claim 1, it is characterised in that：First ball head knife is high-speed steel
Material is constituted, diameter：The number of teeth：4, helical angle：30 °, overall length：63mm, cutting edge are long：19mm.
5. a kind of processing method of aerial blade according to claim 1, it is characterised in that：Second ball head knife is high-speed steel
Material is constituted, diameter：The number of teeth：4, helical angle：30 °, overall length：57mm, cutting edge are long：13mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666230A (en) * | 2019-09-20 | 2020-01-10 | 深南电路股份有限公司 | Inner contour groove milling method |
| CN113458466A (en) * | 2021-07-28 | 2021-10-01 | 云南昆船机械制造有限公司 | One-step forming processing method for integral large-side inclined propeller by 360-degree spiral circular cutting in space |
| CN115122058A (en) * | 2022-07-28 | 2022-09-30 | 中国科学院金属研究所 | Method for machining blade by using five-axis numerical control machining center |
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