CN110142472A - A kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing - Google Patents
A kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing Download PDFInfo
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- CN110142472A CN110142472A CN201910418293.8A CN201910418293A CN110142472A CN 110142472 A CN110142472 A CN 110142472A CN 201910418293 A CN201910418293 A CN 201910418293A CN 110142472 A CN110142472 A CN 110142472A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/10—Supply or regeneration of working media
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- Chemical & Material Sciences (AREA)
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- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The present invention relates to a kind of methods of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing, belong to technical field of electrolysis processing.When processing, cathode fixing seat does the compound motion of straight line and rotation under the action of processing axis, the tool cathode of electric pushrod control simultaneously does compound motion, and the closed curve being made of the motion profile of cathode blade and plane are constantly formed in the intracavitary portion of tool cathode type, fed it is primary after, several groups closed curve and plane will be superimposed together shaped objects blade profile and blade profile.Electrolyte takes away electrolysate by cathode fixing seat and the processed region of cathode end cap inside stream.This method for the blade profile of different degreeof tortuosities can be set it is different feed path, have stronger flexibility.Due to directly processing blade using the method for combined feed forming, error very little existing for obtained blade profile profile and theoretical profile provides processing basis for subsequent finishing blade profile.
Description
Technical field
The invention discloses a kind of methods of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing, belong to electrolysis and add
Work technical field.
Background technique
Electrolyzed Processing be occurred in the electrolytic solution based on metal anodic solution principle reach material removal a kind of technique
Method.One of main method as the special process, electrochemical Machining Technology is by process velocity is fast, tool is lossless, does not generate
Outstanding advantages of cutting residual stress, and not influenced by material mechanical performance is widely used in Aeronautics and Astronautics manufacture neck
Domain.In recent years, due to processing efficiency with higher, Electrolyzed Processing is increasingly becoming the main method of processing integral blade disk.
Blisk is complicated, and blade compact layout, this materially increases integral blade disk work in-process
Difficulty.Currently, Electrolyzed Processing complex profile integral blade disk is broadly divided into two procedures: roughing blade grid passage and finishing blade
Type face.The problems such as that there is residual differences is larger for the electrolysis preprocessing method of the integral blade disk of application, hub surface machining accuracy, mentions
The focus and hot spot of the always related practitioner's research of processing technology rationally, economic out.
For integral blade disk electrolysis preprocessing method specifically include that jacking Electrolyzed Processing, radial feed Electrolyzed Processing and
Numerical control transforms into Electrolyzed Processing.Electrolysis overlaying processing method, which is moved by tool cathode along leaf dish radial alignment, processes blade, only
It is capable of processing out prismatic blade；Radial feed electrochemical machining method is moved along leaf dish radial alignment using molding cathode and is processed
Blade grid passage, blade grid passage biggish for degreeof tortuosity, the blade profile profile processed and there are one between theoretical profile
Fixed error；Numerical control transforms into electrochemical machining method and can process to variable cross-section blade grid passage, but the track of tool cathode is straight
Line applicable surface, so can not also process the biggish blade of type face degreeof tortuosity.Last decade, it was also proposed that it is some about electrolysis plus
The Chinese patent of work integral blade disk proposes one kind such as Chinese Patent No. 200910025834.7 of Zhu Di, Xu Qinghe Xu's JustYoung
Multi-electrode spiral feeding integral blade wheel inter-blade passage electrolytic machining method；In Xu Zhengyang, Zhang Juchen, Liu Jia, Zhu Dong and Zhu Di
State's patent
201410013249.6 number propose it is a kind of can straight line and rotation combined feed integral blade disk electrochemical machine tool and
Method.The electrochemical machining method for integral blade disk that this two patents propose all is directly to process leaf grating using molding cathode
Channel, then by processing a complete blade indirectly after processing two blade grid passages, so that the blade type after processing
Face precision is poor, and residual difference is larger, and the difficulty of blade profile is finished after increasing.
Summary of the invention
The present invention is difficult to the deficiency of Big-Twisted blades integral blade disk for electrolysis overlaying processing method, proposes a kind of change
The method of the big distortion leaf dish of section inner cavity tool cathode Electrolyzed Processing.This method does straight line and rotation in processing by tool cathode
The compound motion turned is overlapped the blade profile precision for forming blade profile, obtaining by the motion profile of blade in the intracavitary portion of cathode type
Height provides processing basis for subsequent finishing blade profile.
The technical scheme of the present invention is realized as follows:
A kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing, including for editing objective blade
Leaf dish blank, machining tool, the machining tool is interior to be equipped with processing unit (plant) and leaf dish shaft, and the leaf dish blank is fixed on described
In leaf dish shaft, it is characterised in that: the processing unit (plant) includes cathode fixing seat, processing axis, tool cathode, and the cathode is fixed
Seat is equipped with the type chamber of opening setting, and the processing axis is fixed in the cathode fixing seat and to extend to the type intracavitary, described
Tool cathode is fixed on the processing axis and extends to the intracavitary position of the type, and the tool cathode is by several retractables
Bar composition, the tool cathode two sides are equipped with cathode end cap, and the type is intracavitary to be additionally provided with electric pushrod, the electric pushrod
One section is fixed on the side wall of the type chamber, and the other end of the electric pushrod is connect with the tool cathode, and the cathode is solid
Electrolyte inlet is additionally provided in reservation, the electrolyte inlet is connected to cavity
The present invention is further arranged to, including following processing method:
(1) it sets target blade shape: the tool cathode being arranged according to the shape of the target blade and is starting to process
Preceding cross sectional shape, the tool cathode mobile on x-axis, y-axis and z-axis line direction in the machining tool are controlled respectively
Make the position of tool cathode left and right, front and back and upper and lower three directions in the machining tool；
(2) tool cathode is fed: the tool cathode and the cathode fixing seat are considered as a single unit system when feeding,
The cathode fixing seat under the action of processing axis along the leaf dish blank radial motion, while the tool cathode also edge
The leaf dish blank radial motion；
(3) tool cathode rotates: the cathode fixing seat makes rotating motion, and drives the tool yin by the electric pushrod
Pole corresponding rotary motion is done according to reversing the trend for the target blade profile；
(4) integral blade disk blank rotates: the target blade, the leaf are often completed the process on the leaf dish blank
Disk shaft can all make the leaf dish blank around itself central axes rotational angle θ (N is the leaf of integral blade disk in total
Piece number).
The present invention is further arranged to: when processing, can constantly be formed in the intracavitary portion of the type of the tool cathode by the work
The closed curve and plane of the motion profile composition of tool cathode are formed before when the tool cathode is fed into hub surface
Several groups closed curve and plane are superimposed shaped objects blade profile and target blade profile.
The present invention is further arranged to: the feed motion of the cathode fixing seat and the rotary motion of the tool cathode are same
When beginning and end, tool cathode only need to feed every time once is just capable of processing complete a target blade, add to target blade
After the completion of work, the tool cathode exits the target blade of completion.
The present invention is further arranged to: the projection of the movement locus schematic diagram and target blade that generate when adjusting tool cathode
Figure is equal on tracking quantity, similar in shape.
The present invention is further arranged to: electrolyte is flowed into from the electrolyte inlet, by the cathode fixing seat and
The cathode end cap inside stream is to machining area.
In conclusion the beneficial effects of the present invention are: this method mainly processes Big-Twisted blades integral blade disk, relative to general
Logical integral blade disk, Big-Twisted blades integral blade disk can satisfy engine height in novel medium and small Aeroengine Design, manufacture
Speed, the high requirement for having an high regard for when high reliability, are widely used；Tool cathode is moved along leaf dish radial alignment, and in process
It is middle that corresponding rotary motion is carried out according to reversing the trend for blade profile, the blade profile of different degreeof tortuosities can be set
Different feeds path, and has stronger flexibility；This method directly processes blade by being electrolysed forming, obtained blade
Error very little existing for machined surface profile and theoretical profile, blade profile precision is higher, and residual difference is smaller, is also subsequent finishing leaf
Piece type face provides processing basis；One blade of every processing, tool cathode only need to feed once, reduce and connect tool marks and also improve
Processing efficiency；Electrolyte is flowed into from electrolyte inlet, flows through machining area by electrolyte outlet, electrolyte inlet and is gone out
Liquid mouth can open and close at any time, reduce the loss of electrolyte, operate also simple and reliable.
Detailed description of the invention
Fig. 1 is the Big-Twisted blades integral blade disk electrochemical machining method schematic diagram of forming feeding；
Fig. 2 is tool cathode motion principle figure；
Fig. 2 a is tool cathode structure chart；
Fig. 2 b is the trajectory diagram that tool cathode moves in adjustment process；
Fig. 3 is tool cathode processing blade process figure；
Fig. 3 a is tool cathode and leaf position figure when processing starts；
Fig. 3 b is tool cathode and leaf position figure when completing the process a blade；
Fig. 4 is blade forming process schematic diagram；
Fig. 4 a is blade forming process middle section perspective view；
Fig. 4 b is that tool cathode motion profile is superimposed the blade profile figure to be formed；
Fig. 5 is the blade construction figure that actual processing goes out；
Fig. 6 is the Blisk figure completed after integral blade disk electrolysis preprocessing, and θ expression often added whole after a blade
The angle of body leaf dish blank rotation.
Appended drawing reference: 1, integral blade disk blank；101, wheel hub；2, blade；3, tool cathode；4, cathode end cap；5, electronic
Push rod；6, axis is processed；7, cathode fixing seat；701, electrolyte inlet；8, electrode；9, leaf dish shaft.
Specific embodiment
A kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing, including it is used for editing objective blade 2
Leaf dish blank 1, machining tool, processing unit (plant) and leaf dish shaft 9 are equipped in the machining tool, the leaf dish blank 1 is fixed
In the leaf dish shaft 9, it is characterised in that: the processing unit (plant) includes cathode fixing seat 7, processing axis 6, tool cathode 3, institute
The type chamber that cathode fixing seat 7 is equipped with opening setting is stated, the processing axis 6 is fixed in the cathode fixing seat 7 and extends to institute
State that type is intracavitary, the tool cathode 3 is fixed on the processing axis 6 and extends to the intracavitary position of the type, the tool cathode 3 by
The bars of several retractables forms, and 3 two sides of tool cathode are equipped with cathode end cap 4, the type is intracavitary be additionally provided with it is electronic
Push rod 5, one section of the electric pushrod 5 are fixed on the side wall of the type chamber, the other end of the electric pushrod 5 and the work
Have cathode 3 to connect, electrolyte inlet 701, the electrolyte inlet 701 and institute's type are additionally provided in the cathode fixing seat 7
Chamber connection.
It, can continuous shape in the intracavitary portion of type of the tool cathode 3 when processing as a kind of technical optimization scheme of the invention
The closed curve and plane formed at the motion profile by the tool cathode 3, the tool cathode 3 are fed into 101 table of wheel hub
When face, be superimposed 2 type face of shaped objects blade and target blade 2 of the several groups closed curve and plane formed before is taken turns
It is wide.
As a kind of technical optimization scheme of the invention, the feed motion of the cathode fixing seat 7 and the tool cathode 3
Rotary motion start simultaneously at and terminate, tool cathode 3 every time only need feed once is just capable of processing complete a target blade
2, after processing is completed to target blade 2, the tool cathode 3 exits the target blade 2 of completion.
As a kind of technical optimization scheme of the invention, the movement locus schematic diagram generated when adjusting tool cathode 3 and mesh
The perspective view for marking blade 2 is equal on tracking quantity, similar in shape.
As a kind of technical optimization scheme of the invention, electrolyte is flowed into from the electrolyte inlet 701, by described
Machining area is flowed to inside cathode fixing seat 7 and the cathode end cap 4.
The specific implementation step of the method for the present invention:
Step 1: before processing starts, it is initial that tool cathode 3 is first regulated according to the cross sectional shape at the top of target blade 2
Cross sectional shape, while tool cathode 3 being mounted in cathode fixing seat 7 by electric pushrod 5, then by 7 edge of cathode fixing seat
Integral blade disk blank 1 is positioned radially and cathode fixing seat 7 is on the circumference of integral blade disk blank 1；
Step 2: Electrolyzed Processing positive pole 8 is connect with integral blade disk blank 1, and power cathode 8 is connected on processing axis 6,
Power good is kept, opens simultaneously electrolyte inlet 701, electrolyte can pass through 4 inside stream of cathode fixing seat 7 and cathode end cap
Through arriving machining area；
Step 3: when starting processing, cathode fixing seat 7, along leaf dish radial feed, while being done and being revolved under the action of processing axis 6
Transhipment is dynamic, 5 fastening means cathode 3 of electric pushrod, and control tool cathode 3 does feed motion and reversing the trend according to blade profile
Do corresponding rotary motion；
Step 4: feeding time processing goes out a blade 2, and as shown in Figure 4 b, wherein α is machined surface when starting, and β is knot
Machined surface when beam, machine direction is as shown by arrows in figure, after completing processing, cathode fixing seat 7 and tool cathode 3 will do it with
The blade 2 of completion is exited in the opposite movement of step 3；
Step 5: after often completing the process a blade 2, the meeting of integral blade disk blank 1 angle of rotation under the action of leaf dish shaft 9
Spend θ；
Step 6: process repeats always electricity of the step 3 to step 5, until completing Big-Twisted blades integral blade disk
Solve preprocessing；
Step 7: electrolyte inlet 701 is closed before completing the process the last one blade 2, by electrolyte passage
The electrolyte in portion completes the process the last one blade 2, avoids tool cathode 3 to the anticaustic of machined surface.
Claims (6)
1. a kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing, including it is used for editing objective blade (2)
Leaf dish blank (1), machining tool, processing unit (plant) and leaf dish shaft (9), the leaf dish blank are equipped in the machining tool
(1) it is fixed on the leaf dish shaft (9), it is characterised in that: the processing unit (plant) includes cathode fixing seat (7), processing axis
(6), tool cathode (3), the cathode fixing seat (7) are equipped with the type chamber of opening setting, and the processing axis (6) is fixed on the yin
In pole fixing seat (7) and to extend to the type intracavitary, the tool cathode (3) be fixed on the processing axis (6) extend to it is described
The intracavitary position of type, the tool cathode (3) are made of the bar of several retractables, and tool cathode (3) two sides are all provided with
Have cathode end cap (4), the type is intracavitary to be additionally provided with electric pushrod (5), and one section of the electric pushrod (5) is fixed on the type chamber
Side wall on, the other end of the electric pushrod (5) is connect with the tool cathode (3), is also set on the cathode fixing seat (7)
Have electrolyte inlet (701), the electrolyte inlet (701) is connected to cavity.
2. a kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing according to claim 1, special
Sign is, including following processing method:
(1) it sets target blade shape: the tool cathode (3) being arranged according to the shape of the target blade (2) and is starting to add
Cross sectional shape before work, movement of the tool cathode (3) in the machining tool on x-axis, y-axis and z-axis line direction
The position of the tool cathode (3) left and right, front and back and upper and lower three directions in the machining tool is controlled respectively；
(2) tool cathode is fed: the tool cathode (3) and the cathode fixing seat (7) being considered as an entirety dress when feeding
Set, the cathode fixing seat (7) under the action of processing axis (6) along leaf dish blank (1) radial motion, while it is described
Tool cathode (3) is also along leaf dish blank (1) radial motion；
(3) tool cathode rotates: the cathode fixing seat (7) makes rotating motion, and drives the tool by the electric pushrod (5)
Cathode (3) does corresponding rotary motion according to the reversing the trend for target blade (2) type face；
(4) integral blade disk blank rotates: the target blade (2) is often completed the process on the leaf dish blank (1), it is described
Leaf dish shaft (9) can all make the leaf dish blank (1) around itself central axes rotational angle θ (N is integral blade disk
Blade number in total).
3. a kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing according to claim 2, special
Sign is: when processing, can constantly be formed in the intracavitary portion of type of the tool cathode (3) by the movement rail of the tool cathode (3)
The closed curve and plane of mark composition, when the tool cathode (3) is fed into wheel hub (101) surface, the several groups that are formed before
Closed curve and plane are superimposed shaped objects blade (2) type face and target blade (2) profile.
4. a kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing according to claim 2, special
Sign is: the feed motion of the cathode fixing seat (7) and the rotary motion of the tool cathode (3) start simultaneously at and terminate,
Tool cathode (3) only needs to feed once just to be capable of processing every time to complete a target blade (2), processes to target blade (2)
Cheng Hou, the tool cathode (3) exit the target blade (2) of completion.
5. a kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing according to claim 2, special
Sign is: adjusting the movement locus schematic diagram of tool cathode (3) Shi Shengcheng and the perspective view of target blade (2) on tracking quantity
It is equal, it is similar in shape.
6. a kind of method of the big distortion leaf dish of variable cross-section inner cavity tool cathode Electrolyzed Processing according to claim 1, special
Sign is: electrolyte is flowed into from the electrolyte inlet (701), passes through the cathode fixing seat (7) and the cathode end cap
(4) internal to flow to machining area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910418293.8A CN110142472B (en) | 2019-05-20 | 2019-05-20 | Method for machining large-distortion blade disc by cathode electrolysis of variable-section inner cavity tool |
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| CN201910418293.8A CN110142472B (en) | 2019-05-20 | 2019-05-20 | Method for machining large-distortion blade disc by cathode electrolysis of variable-section inner cavity tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333878A (en) * | 2021-05-31 | 2021-09-03 | 中国航空制造技术研究院 | Electrochemical sleeve shape processing device for bending-torsion variable-section blade |
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| CN113333878A (en) * | 2021-05-31 | 2021-09-03 | 中国航空制造技术研究院 | Electrochemical sleeve shape processing device for bending-torsion variable-section blade |
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