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CN108296533B - Alignment method and fixture for double-station milling of counterweight blade - Google Patents

Alignment method and fixture for double-station milling of counterweight blade Download PDF

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Publication number
CN108296533B
CN108296533B CN201810097067.XA CN201810097067A CN108296533B CN 108296533 B CN108296533 B CN 108296533B CN 201810097067 A CN201810097067 A CN 201810097067A CN 108296533 B CN108296533 B CN 108296533B
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station
blade
blade root
axis
clamping
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CN108296533A (en
Inventor
鄢龙志
代星
崔光玉
浦栋麟
严思杰
丁汉
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Jiangsu Jihui Huake Intelligent Equipment Technology Co ltd
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HUST Wuxi Research Institute
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/16—Working surfaces curved in two directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2703/00—Work clamping
    • B23Q2703/02—Work clamping means
    • B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

The present invention provides a kind of counterweight blade double-station Milling Process aligning method, the following steps are included: step S1, installs fixture on A axis transition disc in machining center, the clamping base of clamp body is positive towards Z axis, and on measured material body clamping base bounce, A shaft angle degree is constantly adjusted simultaneously, until datum level bounce is within given threshold；Step S2 installs the first blank of blade on the first station of clamp body；Step S3 completes blade root feature machining on the first station；Step S4, clamping is in the second station of clamp body after step S3 is completed the second blank of blade disassembly after processing；Step S5 carries out second station automatic capturing using line measuring probe；After completing centering, the processing of blade profile and blade profile and blade root adapter surface is completed with the program after transformation Cutter coordinate system by step S6.The feature that this method has centering precision high, high-efficient and at low cost.

Description

Counterweight blade double-station Milling Process aligning method and fixture
Technical field
The present invention relates to aero-engine counterweight blade processing technology more particularly to a kind of aero-engine counterweight blade are double Station Milling Process aligning method and fixture.
Background technique
Counterweight blade in aero-engine balances the distribution of weight of entire rotatable parts in engine operation process, makes Engine reaches a state that is quiet, dynamically balancing.Its must under high temperature, high pressure, high-revolving operating condition steady operation, this is right Blade material, machining accuracy and surface quality propose high requirement, increase the difficulty of Milling Process.
Currently, the key step of Milling Process the type blade scheme are as follows: clamping integral shroud part processes leaf root part；It adopts With blade root tongue-and-groove profiling jig, blade root is clamped, processes blade profile；Wire cutting removes block more than integral shroud.The disadvantage is that: the first, because For blade root and blade, clamping is completed to process in two times, and machining benchmark disunity, consistency is poor, and machining accuracy is difficult to ensure；The Two, two sets of toolings are used in processing, and second process middle tenon groove profiling jig required precision is high, causes frock cost higher.
Summary of the invention
It is an object of the present invention to overcome the shortcomings of the prior art and provide a kind of counterweight blade double-station millings to add Work aligning method and matched fixture, the feature that this method has centering precision high, high-efficient and at low cost are existing to solve There is in technology the existing above problem during aviation engine high-temperature alloy counterweight blade processing, meanwhile, the double-station provided Fixture is able to solve the problem of this kind of blade cannot be processed on yaw turntable type Five-axis NC Machining Center.The technology that the present invention uses Scheme is:
A kind of fixture, the fixture include two stations；
The fixture includes clamp body, and the first station and second station is respectively set in the upper surface of clamp body and end face； The upper surface of clamp body is clamping base；
First station is equipped with the first station positioning datum pedestal and the first station compact heap, deviates from leaf for clamping blank One end of root；
Second station is equipped with second station positioning datum pedestal and second station compact heap, deviates from leaf for clamping blank One end of root；
First station positioning datum pedestal and the first station compact heap and second station positioning datum pedestal and the second work Position compact heap is connected by fastener respectively；
In the end face of clamp body, it is equipped with fixation hole.
Further, the first station positioning datum pedestal is equipped with two positioning surfaces to connect with parallelogram both sides, First station compact heap is equipped with the another two positioning surface to connect with the another both sides of parallelogram；
Second station positioning datum pedestal is equipped with two positioning surfaces to connect with parallelogram both sides, second station pressure Tight block is equipped with the another two positioning surface to connect with the another both sides of parallelogram.
Further, dowel hole is additionally provided in the end face of clamp body.
A kind of counterweight blade double-station Milling Process aligning method, uses above-mentioned fixture, comprising the following steps:
Step S1, installs fixture on A axis transition disc in machining center, the clamping base of clamp body towards Z axis forward direction, and The bounce of clamping base on measured material body, at the same constantly adjustment A shaft angle degree, until the datum level bounce given threshold with It is interior, if the value of A axis is A=0 ° at this time；
Step S2 installs the first blank of blade, the interior positioning surface of the first blank of blade on the first station of clamp body It is bonded with the positioning surface on the first station positioning datum pedestal, compresses the first station compact heap and complete clamping；Clamping position is leaf The first blank of piece deviates from one end of blade root；
Step S3 completes blade root feature machining on the first station；
Step S4, second station of the clamping in clamp body after the second blank of blade after step S3 completion processing is dismantled On；The interior positioning surface of the second blank of blade is bonded with the positioning surface of second station positioning datum pedestal, is compressed second station and is compressed Block completes clamping；Clamping position is one end that the second blank of blade deviates from blade root；
Step S5 carries out second station automatic capturing using line measuring probe；
Step S6 after completing centering, completes blade profile and blade profile with the program after transformation Cutter coordinate system and blade root turns The processing of junction.
Further, step S5 is specifically included:
Step S5.1 is arranged measurement point, writes the process of measurement of each measurement point；Measurement point includes:
Two blade root end surface measurement points of blade root end face are set to, blade centre of gyration two sides are located at；
Two blade root inner arc sagittal plane measurement points of inner arc sagittal plane are set to, blade centre of gyration two sides are located at；
It is set to two blade roots back arc sagittal plane measurement point of back arc sagittal plane, is located at blade centre of gyration two sides；
Between the distance between two blade root inner arc sagittal plane measurement points and two blade roots back arc sagittal plane measurement points away from It is all L from equal；
It is set to the air inlet side measurement point of air inlet side, be set to outlet side goes out gas side measurement point；
Step S5.2 measures two blade root end surface measurement points, obtains X-direction deviation △ X=(△ X51+△X52)/2, wherein △X51Deviation for a blade root end surface measurement point in X-direction, △ X52It is another blade root end surface measurement point in the inclined of X-direction Difference；
Step S5.3 sits the measurement of two blade root inner arc sagittal plane measurement points, two blade root back arc sagittal plane measurement points Mark system measures after moving along the x-axis △ X, obtains the Z-direction deviation △ X of corresponding each point53、△X54、△X55、△X56, calculate rotation Angle △ RotX；△ RotX=arctan (((△ X54-△X53)+(△X55-△X56))/2/L)；
Step S5.4 sits the measurement of two blade root inner arc sagittal plane measurement points, two blade root back arc sagittal plane measurement points Mark system move along the x-axis △ X, rotate angle △ RotX around X-axis after measure, obtain correspond to each point Z-direction deviation △ X '53、△ X’54、△X’55、△X’56, calculate Z axis offset △ Z:
△ Z=((△ X '53+△X’54)-(△X’55+△X’56))/4
Step S5.5, by air inlet side measurement point, the measurement coordinate system of gas side measurement point moves along the x-axis △ X, around X-axis rotation out Gyration △ RotX, it is measured after moving △ Z along Z axis, obtains the Y-direction deviation △ X of corresponding each point57、△X58, it is inclined to calculate Y-axis Shifting amount △ Y:
△ Y=(△ X58-△X57)/2*sinβ
Wherein β is that blade root connects cross section parallelogram acute angle value with blade；
Step S5.6 stores each offset △ X, △ RotX, △ Z and △ Y, the numerical control processing that will be used in second station Program Cutter coordinate system moves along the x-axis △ X, rotates △ RotX around X-axis, moves △ Z along Z axis, finally moves △ Y, centering along Y-axis It completes.
Further, in step S3, blade root end face, air inlet side, inner arc sagittal plane, outlet are specifically processed using end mill(ing) cutter Side, back arc sagittal plane；Intrados tongue-and-groove and convex surface tongue-and-groove are processed using imitating milling cutter；
When processing according to be divided into roughing, three steps of semifinishing and finishing carry out.
Further, step S6 includes: first using hard alloy solid end mill roughing blade profile 9, and surplus is 0.08mm, every knife cutting-in 0.25mm, revolving speed 1200r/min feed as 450mm/min；Then it is finished using taper ball knife Blade profile and blade root adapter surface 8, revolving speed 3000r/min feed as 360mm/min；Last taper ball knife processes blade profile 9, Revolving speed is 3000r/min, is fed as 500mm/min.
Beneficial effects of the present invention are that compared with prior art, this method has the advantages that
1), of less demanding to the clamping of second station, reduce operator's requirement；
2), the centering process of second station realizes automatic measurement centering and numerically controlled machining programme in combination with digital control system function The adjustment of sequence Cutter coordinate system, process is simple, and precision is high, high-efficient；
3), the processing that second station can be adaptively adjusted for the processing situation of the upper station per a piece of blade is sat Mark system, guarantees machining accuracy, promotes product qualification rate；
4) frock clamp required precision, is reduced, frock cost is reduced；
5), this Double-station clamp carry out the processing of the first station middle tenon groove can using imitating milling cutter, improves and adds Work precision and processing efficiency.
Detailed description of the invention
Fig. 1 is the aero-engine counterweight blade schematic diagram that present invention needs are processed.
Fig. 2 a is fixture of the invention and clamping main view.
Fig. 2 b is the top view of Fig. 2 a.
Fig. 2 c is the left view of Fig. 2 a.
Fig. 3 is blade the first blank schematic diagram on the first station of the invention.
Fig. 4 is blade the second blank schematic diagram in second station of the invention.
Fig. 5 is measurement point distribution schematic diagram in the embodiment of the present invention.
Specific embodiment
Below with reference to specific drawings and examples, the invention will be further described.
Fig. 1 show the aero-engine counterweight blade for needing machine-shaping, which includes blade and blade root；
It needs to process on blade blade profile 9 (abbreviation blade profile), blade is integral shroud away from one end of blade root；
Blade root includes: blade root end face 1, convex surface tongue-and-groove 2, intrados tongue-and-groove 3, air inlet side 4, outlet side 6, inner arc diameter To face 5, back arc sagittal plane 7, blade profile and blade root adapter surface 8；
Wherein intrados tongue-and-groove 3 and convex surface tongue-and-groove 2 are located at the upper and lower sides of blade root, air inlet side 4, inner arc sagittal plane 5, outlet side 6, back arc sagittal plane 7 are located at four sides of blade root Yu blade linking part；
The blank of the counterweight blade is the blocky blank after wire cutting, as shown in Figure 3；
For counterweight blade double-station Milling Process, the present invention proposes a kind of fixture, which includes two stations；Such as figure 2a, Fig. 2 b, shown in Fig. 2 c,
The fixture includes clamp body 23, and the first station and the second work is respectively set in the upper surface of clamp body 23 and end face Position；The upper surface of clamp body 23 is clamping base 32；
First station is equipped with the first station positioning datum pedestal 25 and the first station compact heap 26, carries on the back for clamping blank One end from blade root；Since blank is parallelogram away from the section of blade root one end, the first station positioning datum pedestal 25 are equipped with two positioning surfaces to connect with parallelogram both sides, and the first station compact heap 26 is equipped with another with parallelogram The another two positioning surface that both sides connect；
Second station is equipped with second station positioning datum pedestal 28 and second station compact heap 29, carries on the back for clamping blank One end from blade root；Since blank is parallelogram away from the section of blade root one end, second station positioning datum pedestal 28 are equipped with two positioning surfaces to connect with parallelogram both sides, and second station compact heap 29 is equipped with another with parallelogram The another two positioning surface that both sides connect；
First station positioning datum pedestal 25 and the first station compact heap 26 and 28 He of second station positioning datum pedestal Second station compact heap 29 can be connected by bolt 27；In the end face of clamp body 23, it is equipped with fixation hole 30, being used for will by bolt Clamp body 23 is installed to the A axis transition disc 24 of machining center；In the end face of clamp body 23, dowel hole can also be further set 31；To guarantee positioning of the clamp body 23 every time with the A axis transition disc installation site of lathe；
Counterweight blade double-station Milling Process aligning method proposed by the present invention, specifically includes the following steps:
Step S1, the installs fixture on yaw turntable type Five-axis NC Machining Center A axis transition disc 24, the clamping base of clamp body 23 Quasi- face 32 towards Z axis forward direction, and use the bounce of clamping base 32 on silk table measured material body, while constantly adjust A shaft angle degree, directly To datum level bounce within 0.01mm, if the value of A axis is A=0 ° at this time；
Step S2, installs the first blank of blade 21 on the first station of clamp body 23, the first blank of blade 21 it is interior Positioning surface is bonded with the positioning surface on the first station positioning datum pedestal 25, is compressed the first station compact heap 26 and is completed clamping；Dress Pressing from both sides position is one end that the first blank of blade 21 deviates from blade root；
Step S3 completes blade root feature machining on the first station；Blade root end face, air inlet side are specifically processed using end mill(ing) cutter Face, inner arc sagittal plane, outlet side, back arc sagittal plane；Intrados tongue-and-groove and convex surface tongue-and-groove are processed using imitating milling cutter, to protect Machining accuracy and surface roughness are demonstrate,proved, roughing, semifinishing and finishing are specifically divided into；
Step S4, second work of the clamping in clamp body 23 after the second blank of blade 22 after step S3 completion processing is dismantled On position；The interior positioning surface of the second blank of blade 22 is bonded with the positioning surface of second station positioning datum pedestal 28, compresses the second work Position compact heap 29 completes clamping；Clamping position is the one end of the second blank of blade 22 from blade root；
Step S5 carries out second station automatic capturing using line measuring probe；It is specific as follows:
Step S5.1 is arranged measurement point, writes the process of measurement of each measurement point；Measurement point includes:
Two blade root end surface measurement points 51,52 of blade root end face are set to, 59 two sides of the blade centre of gyration are located at；
Two blade root inner arc sagittal plane measurement points 53,54 of inner arc sagittal plane are set to, the blade centre of gyration is located at 59 two sides；
It is set to two blade roots back arc sagittal plane measurement point 55,56 of back arc sagittal plane, is located at the blade centre of gyration 59 two sides；
The distance between two blade root inner arc sagittal plane measurement points 53,54 and two blade roots back arc sagittal plane measurement points 55, The distance between 56 is equal, is all L；
It is set to the air inlet side measurement point 57 of air inlet side, be set to outlet side goes out gas side measurement point 58；
Step S5.2 measures two blade root end surface measurement points 51,52, obtains X-direction deviation △ X=(△ X51+△X52)/ 2, wherein △ X51Deviation for a blade root end surface measurement point 51 in X-direction, △ X52Exist for another blade root end surface measurement point 52 The deviation of X-direction；
Step S5.3, by two blade root inner arc sagittal plane measurement points 53,54, two blade roots back arc sagittal plane measurement points 55, 56 measurement coordinate system measures after moving along the x-axis △ X, obtains the Z-direction deviation △ X of corresponding each point53、△X54、△X55、△ X56, calculate rotation angle △ RotX；△ RotX=arctan (((△ X54-△X53)+(△X55-△X56))/2/L)；
Step S5.4, by two blade root inner arc sagittal plane measurement points 53,54, two blade roots back arc sagittal plane measurement points 55, 56 measurement coordinate system moves along the x-axis △ X, angle △ RotX is rotated around X-axis after measure, the Z-direction for obtaining corresponding each point is inclined Poor △ X '53、△X’54、△X’55、△X’56, calculate Z axis offset △ Z:
△ Z=((△ X '53+△X’54)-(△X’55+△X’56))/4
Step S5.5, by air inlet side measurement point 57, the measurement coordinate system of gas side measurement point 58 moves along the x-axis △ X, around X out Axis rotation angle △ RotX, it is measured after moving △ Z along Z axis, obtains the Y-direction deviation △ X of corresponding each point57、△X58, calculate Y Axle offset amount △ Y:
△ Y=(△ X58-△X57)/2*sinβ
Wherein β is blade root and blade linking part (air inlet side 4, inner arc sagittal plane 5, outlet side 6, back 7 institute of arc sagittal plane The position of enclosing) cross section parallelogram acute angle value, see Fig. 5；
Step S5.6 stores each offset △ X, △ RotX, △ Z and △ Y, the numerical control processing that will be used in second station Program Cutter coordinate system moves along the x-axis △ X, rotates △ RotX around X-axis, moves △ Z along Z axis, finally moves △ Y, centering along Y-axis It completes.
Step S6 after completing centering, completes blade profile 9 and blade profile with the program after transformation Cutter coordinate system and blade root turns The processing of junction 8；
First use hard alloy solid end mill roughing blade profile 9, surplus 0.08mm, every knife cutting-in 0.25mm, Revolving speed is 1200r/min, is fed as 450mm/min；Then using taper ball knife finishing blade profile and blade root adapter surface 8, revolving speed For 3000r/min, feed as 360mm/min；Last taper ball knife processes blade profile 9, revolving speed 3000r/min, feeds and is 500mm/min。
Wire cutting integral shroud: step S7 after completing the processing of blade root and blade profile, still there is fixture retained part at integral shroud Material, which is removed using wire cutting, completes all manufacturing procedures.
Above-mentioned aero-engine counterweight blade double-station Milling Process aligning method and fixture, by rationally designing double-station Fixture, the automatic capturing method carried out using innovative combination on-line measurement are come from for upper station difference processing situation The Cutter coordinate system for adaptively adjusting second station, guarantees machining accuracy, promotes blade qualification rate, improves processing efficiency simultaneously also Frock cost is reduced, while the range of work of yaw turntable type five-axis machine tool has also been enlarged.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it, Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover In the scope of the claims of the present invention.

Claims (6)

1.一种配重叶片双工位铣削加工找正方法，使用一夹具，1. A method for aligning counterweight blade double-station milling processing, using a fixture, 所述夹具包括夹具体(23)，在夹具体(23)的上表面和端面分别设置第一工位和第二工位；夹具体(23)的上表面为装夹基准面(32)；The clamp comprises a clamping body (23), and a first station and a second station are respectively provided on the upper surface and the end face of the clamping body (23); the upper surface of the clamping body (23) is a clamping reference plane (32); 第一工位上设有第一工位定位基准底座(25)和第一工位压紧块(26)，用于装夹毛坯背离叶根的一端；The first station is provided with a first station positioning reference base (25) and a first station pressing block (26) for clamping the end of the blank away from the blade root; 第二工位上设有第二工位定位基准底座(28)和第二工位压紧块(29)，用于装夹毛坯背离叶根的一端；The second station is provided with a second station positioning reference base (28) and a second station pressing block (29) for clamping the end of the blank away from the blade root; 第一工位定位基准底座(25)和第一工位压紧块(26)，以及第二工位定位基准底座(28)和第二工位压紧块(29)分别通过紧固件连接；The first station positioning reference base (25) and the first station pressing block (26), and the second station positioning reference base (28) and the second station pressing block (29) are respectively connected by fasteners ; 在夹具体(23)的端面，设有固定孔(30)；A fixing hole (30) is provided on the end face of the clamping body (23); 其特征在于，包括以下步骤：It is characterized in that, comprises the following steps: 步骤S1，在加工中心的A轴过渡盘(24)上安装夹具，夹具体(23)的装夹基准面(32)朝Z轴正向，并测量夹具体上装夹基准面(32)的跳动，同时不断调整A轴角度，直至该基准面跳动在设定阈值以内，设此时A轴的值为A＝0°；In step S1, a fixture is installed on the A-axis transition plate (24) of the machining center, the clamping reference plane (32) of the clamping body (23) faces the positive direction of the Z-axis, and the runout of the clamping reference plane (32) on the clamping body is measured. , and continuously adjust the angle of the A-axis until the datum plane beats within the set threshold, and set the value of the A-axis at this time to A=0°; 步骤S2，在夹具体(23)的第一工位上安装好叶片第一毛坯(21)，叶片第一毛坯(21)的内定位面与第一工位定位基准底座(25)上的定位面贴合，压紧第一工位压紧块(26)完成装夹；装夹位置为叶片第一毛坯(21)背离叶根的一端；Step S2, the first blade blank (21) is installed on the first station of the clamping body (23), the inner positioning surface of the blade first blank (21) and the positioning on the first station positioning reference base (25) The surfaces are fitted, and the first station pressing block (26) is pressed to complete the clamping; the clamping position is the end of the first blade blank (21) away from the blade root; 步骤S3，完成第一工位上叶根特征加工；Step S3, complete the blade root feature processing on the first station; 步骤S4，将步骤S3完成加工后的叶片第二毛坯(22)拆卸后装夹在夹具体(23)的第二工位上；叶片第二毛坯(22)的内定位面与第二工位定位基准底座(28)的定位面贴合，压紧第二工位压紧块(29)完成装夹；装夹位置为叶片第二毛坯(22)背离叶根的一端；In step S4, the second blank (22) of the blade processed in step S3 is disassembled and then clamped on the second station of the clamping body (23); the inner positioning surface of the second blank (22) of the blade is connected to the second station. The positioning surfaces of the positioning reference base (28) are fitted, and the second station pressing block (29) is pressed to complete the clamping; the clamping position is the end of the second blade blank (22) away from the blade root; 步骤S5，使用线测量探头，进行第二工位自动找正；Step S5, use the line measuring probe to automatically align the second station; 步骤S6，完成找正后，用变换加工坐标系后的程序完成叶片型面(9)及叶型与叶根转接面(8)的加工。Step S6, after the alignment is completed, the processing of the blade profile (9) and the blade profile and blade root transition surface (8) is completed by using the program after transforming the processing coordinate system. 2.如权利要求1所述的配重叶片双工位铣削加工找正方法，其特征在于，2. The method for aligning counterweight vane duplex milling processing as claimed in claim 1, characterized in that, 第一工位定位基准底座(25)上设有以平行四边形两边相接的两个定位面，第一工位压紧块(26)上设有以平行四边形另两边相接的另两个定位面；The first station positioning reference base (25) is provided with two positioning surfaces connected by two sides of a parallelogram, and the first station pressing block (26) is provided with another two positioning surfaces connected by the other two sides of the parallelogram noodle; 第二工位定位基准底座(28)上设有以平行四边形两边相接的两个定位面，第二工位压紧块(29)上设有以平行四边形另两边相接的另两个定位面。The second station positioning reference base (28) is provided with two positioning surfaces connected by two sides of a parallelogram, and the second station pressing block (29) is provided with two other positioning surfaces connected by the other two sides of the parallelogram noodle. 3.如权利要求1所述的配重叶片双工位铣削加工找正方法，其特征在于，3. The method for aligning counterweight vane duplex milling processing as claimed in claim 1, characterized in that, 在夹具体(23)的端面还设有定位销孔(31)。A positioning pin hole (31) is also provided on the end face of the clamping body (23). 4.如权利要求1所述的配重叶片双工位铣削加工找正方法，其特征在于，4. The method for aligning counterweight vane duplex milling processing as claimed in claim 1, characterized in that, 步骤S5具体包括：Step S5 specifically includes: 步骤S5.1，设置测量点，编写各测量点的测量程序；测量点包括：Step S5.1, set the measurement points, and write the measurement program of each measurement point; the measurement points include: 设置于叶根端面的两个叶根端面测量点(51、52)，分别位于叶片回转中心(59)两侧；The two blade root end face measurement points (51, 52) arranged on the blade root end face are respectively located on both sides of the blade rotation center (59); 设置于内弧径向面的两个叶根内弧径向面测量点(53、54)，分别位于叶片回转中心(59)两侧；Two measuring points (53, 54) on the radial surface of the inner arc of the blade root, which are arranged on the radial surface of the inner arc, are respectively located on both sides of the center of rotation of the blade (59); 设置于背弧径向面的两个叶根背弧径向面测量点(55、56)，分别位于叶片回转中心(59)两侧；Two measuring points (55, 56) on the radial surface of the back-arc of the blade root, which are arranged on the radial surface of the back-arc, are respectively located on both sides of the center of rotation of the blade (59); 两个叶根内弧径向面测量点(53、54)之间的距离与两个叶根背弧径向面测量点(55、56)之间的距离相等，都是L；The distance between the two measurement points (53, 54) on the radial surface of the inner arc of the blade root is equal to the distance between the two measurement points (55, 56) on the radial surface of the back arc of the blade root, and both are L; 设置于进气侧面的进气侧测量点(57)，设置于出气侧面的出气侧测量点(58)；an inlet side measurement point (57) arranged on the inlet side, and an outlet side measurement point (58) arranged on the outlet side; 步骤S5.2，测量两个叶根端面测量点(51、52)，获得X方向偏差△X＝(△X51+△X52)/2,其中△X51为一个叶根端面测量点(51)在X方向的偏差，△X52为另一个叶根端面测量点(52)在X方向的偏差；Step S5.2, measure two blade root end surface measurement points (51, 52) to obtain X-direction deviation △X=(△X 51 +△X 52 )/2, where △X 51 is a blade root end surface measurement point ( 51) The deviation in the X direction, △X 52 is the deviation in the X direction of the other blade root end face measurement point (52); 步骤S5.3，将两个叶根内弧径向面测量点(53、54)，两个叶根背弧径向面测量点(55、56)的测量坐标系沿X轴移动△X后进行测量，得到对应各点的Z向偏差△X53、△X54、△X55、△X56，计算旋转角度△RotX；△RotX＝arctan(((△X54-△X53)+(△X55-△X56))/2/L)；Step S5.3, move the measurement coordinate system of the two blade root inner arc radial surface measurement points (53, 54) and the two blade root back arc radial surface measurement points (55, 56) along the X axis by ΔX. Measure to get the Z-direction deviations of corresponding points △X 53 , △X 54 , △X 55 , △X 56 , and calculate the rotation angle △RotX; △RotX=arctan(((△X 54 -△X 53 )+( △X 55 -△X 56 ))/2/L); 步骤S5.4，将两个叶根内弧径向面测量点(53、54)，两个叶根背弧径向面测量点(55、56)的测量坐标系沿X轴移动△X、绕X轴旋转角度△RotX后进行测量，得到对应各点的Z向偏差△X’53、△X’54、△X’55、△X’56，计算Z轴偏移量△Z：Step S5.4, move the measurement coordinate systems of the two blade root inner arc radial surface measurement points (53, 54) and the two blade root back arc radial surface measurement points (55, 56) along the X axis by ΔX, Rotate the angle △RotX around the X-axis and measure it to obtain the Z-direction deviations △X' 53 , △X' 54 , △X' 55 , △X' 56 corresponding to each point, and calculate the Z-axis offset △Z: △Z＝((△X’53+△X’54)-(△X’55+△X’56))/4△Z=((△X' 53 +△X' 54 )-(△X' 55 +△X' 56 ))/4 步骤S5.5，将进气侧测量点(57)、出气侧测量点(58)的测量坐标系沿X轴移动△X、绕X轴旋转角度△RotX、沿Z轴移动△Z后进行测量，得到对应各点的Y向偏差△X57、△X58，计算Y轴偏移量△Y：Step S5.5, move the measurement coordinate system of the measuring point (57) on the intake side and the measuring point (58) on the exhaust side along the X axis by ΔX, rotate the angle ΔRotX around the X axis, and move ΔZ along the Z axis to measure , get the Y-direction deviations △X 57 , △X 58 of the corresponding points, and calculate the Y-axis offset △Y: △Y＝(△X58-△X57)/2*sinβ△Y=(△X 58 -△X 57 )/2*sinβ 其中β为叶根与叶身相接部横截面平行四边形锐角值；where β is the acute angle value of the parallelogram of the cross-section of the junction between the blade root and the blade body; 步骤S5.6，存储各偏移量△X、△RotX、△Z及△Y，将第二工位上使用到的数控加工程序加工坐标系沿X轴移动△X，绕X轴旋转△RotX，沿Z轴移动△Z，最后沿Y轴移动△Y，找正完成。Step S5.6, store the offsets △X, △RotX, △Z and △Y, move the machining coordinate system of the CNC machining program used in the second station by △X along the X axis, and rotate △RotX around the X axis , move △Z along the Z axis, and finally move △Y along the Y axis, and the alignment is completed. 5.如权利要求1所述的配重叶片双工位铣削加工找正方法，其特征在于，5. The method for aligning counterweight vane duplex milling processing as claimed in claim 1, characterized in that, 步骤S3中，具体采用端铣刀加工叶根端面、进气侧面、内弧径向面、出气侧面、背弧径向面；采用仿形铣刀加工内弧面榫槽和背弧面榫槽；In step S3, the blade root end face, the air inlet side face, the inner arc radial face, the air outlet side face, and the back arc radial face are processed by an end mill; ; 加工时按照分为粗加工、半精加工及精加工三个步骤进行。During processing, it is divided into three steps: roughing, semi-finishing and finishing. 6.如权利要求1所述的配重叶片双工位铣削加工找正方法，其特征在于，6. The method for aligning counterweight vane duplex milling processing as claimed in claim 1, characterized in that, 步骤S6包括：先采用硬质合金整体立铣刀粗加工叶片型面(9)，余量为0.08mm，每刀切深0.25mm，转速为1200r/min，进给为450mm/min；然后采用锥度球刀精加工叶型与叶根转接面(8)，转速为3000r/min，进给为360mm/min；最后锥度球刀加工叶片型面(9)，转速为3000r/min，进给为500mm/min。Step S6 includes: firstly rough machining the blade profile (9) with a cemented carbide integral end mill, with a margin of 0.08 mm, a depth of cut of 0.25 mm per knife, a rotational speed of 1200 r/min, and a feed of 450 mm/min; The taper ball cutter is used for finishing the airfoil and blade root transition surface (8), the speed is 3000r/min, the feed is 360mm/min; the last taper ball cutter processes the blade profile (9), the speed is 3000r/min, the feed is 500mm/min.
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