CN210817827U - Precise electrolytic machining device for large-distortion blade - Google Patents
Precise electrolytic machining device for large-distortion blade Download PDFInfo
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- CN210817827U CN210817827U CN201921549666.7U CN201921549666U CN210817827U CN 210817827 U CN210817827 U CN 210817827U CN 201921549666 U CN201921549666 U CN 201921549666U CN 210817827 U CN210817827 U CN 210817827U
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Abstract
The utility model relates to a precision electrolytic machining device for large-distortion blades, including cathode positioning and clamping device, work piece quick change device and electrolyte guiding device, the utility model discloses a totally closed electrolytic machining frock clamp, the design of wholeization negative pole to combine the metal section that sets up on leaf basin negative pole and the leaf back of the body negative pole and the compound water conservancy diversion section that the insulating section combines, make the course of working flow stable. The machining device can ensure the high precision of the space positioning of the blade, meanwhile, the quick replacement and installation of a workpiece can be realized by means of the quick replacement reference element arranged on the totally-enclosed tool, the integrated forming of the basin surface, the back surface, the air inlet edge and the air outlet edge of the blade can be realized by one-time clamping, and the purposes of improving the electrochemical machining precision and the machining efficiency of the blade are achieved.
Description
Technical Field
The utility model relates to a numerical control electrolytic machining technical field, concretely relates to accurate electrolytic machining device of big distortion blade.
Background
The electrochemical machining is based on the principle that the anode of a workpiece dissolves and removes materials, has the advantages of no loss of a tool cathode, good machining surface quality, no residual stress, no limitation of material hardness, capability of machining all conductive materials and the like, can obtain better surface quality and machining precision by the electrochemical machining technology under the condition of ensuring reasonable process rules, and has unique advantages particularly on machining materials difficult to machine, so that the electrochemical machining technology has wide application in manufacturing aviation and aerospace engine blades.
As a core component of an aircraft, an aircraft engine component is being developed toward weight reduction and integration. The blade is complex in structure, high in machining precision requirement, thin and twisted in profile, and made of materials difficult to machine, so that the manufacturing difficulty is high. The electrolytic machining technology embodies unique advantages, and researches on improving the electrolytic machining precision and the electrolytic machining efficiency of the blades are constantly devoted at home and abroad.
In the practice of electrolytic machining production of blades, a machining method of double-sided feeding of a blade basin cathode and a blade back cathode is mainly adopted at present, and the machining method is mainly characterized in that a workpiece is fixed on a clamp in a stationary mode, the blade basin cathode and the blade back cathode are fed and machined at different angles according to the profile characteristics of the blades, but the feeding mode can cause uneven stress on a feeding shaft, the service life of the feeding shaft is shortened, the electrolytic machining precision of the blades is influenced, meanwhile, a special feeding shaft needs to be designed for one blade, and the machining mode is not universal.
Traditional blade electrolysis anchor clamps are usually with the work piece blank fixed in the anchor clamps main part, and a blade processing is accomplished the back, need pull down the work piece and adorn new blank, and whole process is consuming time and is used up power, and machining efficiency is lower, consequently need study a split type anode clamp independent of anchor clamps main part, realize changing fast of work piece and adorn in order to improve the blade and change dress efficiency under the prerequisite of guaranteeing blank repeated positioning accuracy.
In the past blade electrolytic machining, the electrolyte usually adopts the feed liquor mode of the lateral flow formula, the electrolyte is divided into two strands from advancing (exhausting) limit and flows through the leaf basin and the processing area of blade back respectively, then flow out from arranging (advancing) its limit, leaf basin and blade back profile shaping effect is better, but to the big distortion blade, this kind of feed liquor mode advances, exhaust limit department can lead to the electrolyte velocity of flow sudden change, the flow field is relatively poor, lead to the blade advance, exhaust limit shaping difficulty, therefore need study a new anchor clamps runner structure in order to guarantee that the flow field is stable in the course of working, improve blade electrolytic machining precision and machining efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the aeroengine blade of research, the blade profile is thin and twists, and the material is superalloy, is typical difficult processing material, the utility model discloses on the basis of deepening analysis blade profile characteristic, provided a big distortion blade electrolytic machining device, adopted totally closed electrolytic machining frock clamp and integrated negative pole structural design, through disposable clamping, the coaxial sharp feeding in opposite directions of leaf basin negative pole and leaf back negative pole is to the processing end position, realizes that the whole electrochemistry of blade dissolves and takes shape.
In order to achieve the above purpose, the utility model provides a technical scheme is:
a precise electrolytic machining device for large-distortion blades comprises a cathode positioning and clamping device, a workpiece quick-changing device and an electrolyte flow guide device; the cathode positioning and clamping device is horizontally and symmetrically arranged on the left side and the right side of the device, the electrolyte guiding device comprises a clamp base, a leaf basin cathode and a leaf back cathode, the leaf basin cathode and the leaf back cathode are connected with the cathode positioning and clamping device, and the clamp base and the workpiece quick-change device are positioned in the center of the device;
the cathode positioning and clamping device comprises an adapter plate, a cathode rod and a cathode connecting block which are sequentially connected, wherein the adapter plate is arranged on the outer side of the cathode rod, the cathode connecting block is arranged on the inner side of the cathode rod, and the inner end of the cathode connecting block is connected with a cathode; the cathode positioning and clamping device is arranged in a left-right symmetrical mode, and the inner ends of the cathode connecting blocks at the left part and the right part are respectively connected with a blade back cathode and a blade basin cathode;
the workpiece quick-change device comprises a metal plate, a blank positioning block, a quick-change reference part, a blank positioning block connecting plate and a guide rod; the quick-change datum parts are horizontally symmetrical, bases of the quick-change datum parts are rigidly connected with a metal plate, the blank positioning block is connected with a blank positioning block connecting plate, a fixture head of a workpiece quick-change fixture is mounted on the blank positioning block, the fixture head is matched with the base of the quick-change datum part on the metal plate, and a guide rod connected with the metal plate is arranged on the blank positioning block connecting plate;
the clamp base of the electrolyte flow guide device is positioned on the same plane and is provided with three cylindrical channels; the two cylindrical channels are coaxial and are respectively a cathode channel for placing a cathode of the leaf basin and a cathode channel for placing a cathode of the leaf back, and the other cylindrical channel is perpendicular to the two cathode channels, is positioned between the two cathode channels and is an anode clamp channel.
Furthermore, a composite type flow guide section formed by combining a metal section and an insulating section is arranged on the leaf basin cathode and the leaf back cathode.
Furthermore, the upper end face and the lower end face of the cathode rod are provided with limiting blocks.
Furthermore, the clearance between the blank locating block and the metal plate is 0.25mm, and the blank locating block and the metal plate are sealed through a sealing ring.
Furthermore, a back pressure valve is arranged at a liquid outlet of the clamp of the electrolyte guiding device.
Furthermore, the tail ends of the flow guide sections of the leaf basin cathode and the leaf back cathode are arranged to be horn mouths.
Furthermore, the fixture base is made of an insulating material, and three cylindrical channels of the fixture base are all subjected to electrolyte sealing treatment through O-shaped sealing rings.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a totally closed electrolytic machining frock clamp and wholeization negative pole structural design to combine the compound water conservancy diversion section that metal section and the insulating segment that set up on leaf basin negative pole and the leaf back of the body negative pole combined, make the course of working flow field stable, but the tolerable blank surplus changes at great size within range, but the stray corruption in the furthest reduction course of working simultaneously.
The utility model discloses can realize the work piece and change the outfit fast with the help of the quick change benchmark component that sets up on the totally closed frock to can once the clamping realize that the integrated into one piece on leaf basin face, the leaf back and advance, exhaust limit takes shape, improved blade electrolytic machining precision and machining efficiency.
Drawings
FIG. 1 illustrates the principle of electrochemical machining of a blade.
FIG. 2 shows a precision electrolytic machining fixture for a large twisted blade.
FIG. 3 is a three-dimensional model of a tooling fixture.
FIG. 4 shows the working principle of precision electrolytic machining of a large twisted blade.
In the figure: 1. a clamp base plate; 2. a base; 3. an adapter plate; 4. a cathode rod; 5. a connecting rod sealing cover; 6. a metal plate; 7. a cathode sealing plate; 8. a leaf back cathode; 9. a liquid outlet end cover; 10. a flow guide section on the base; 11. a blank positioning block; 12. a leaf basin cathode; 13. a cathode connecting block; 14. a workpiece blank; 15. a base lower flow guide section; 16. a clamp liquid outlet; 17. quickly replacing the reference part; 18. a connecting plate of a blank positioning block; 19. a guide bar; 20. an insulating flow guide section; 21. a metal flow guide section; 22. a bell mouth.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
A precise electrolytic machining device for large-distortion blades comprises a cathode positioning and clamping device, a workpiece quick-changing device and an electrolyte flow guide device; the cathode positioning and clamping device is horizontally and symmetrically arranged on the left side and the right side of the device, the electrolyte guiding device comprises a clamp base 2, a leaf basin cathode 12 and a leaf back cathode 8, the leaf basin cathode 12 and the leaf back cathode 8 are connected with the cathode positioning and clamping device, and the clamp base 2 and the workpiece quick-change device are positioned in the center of the device;
the cathode positioning and clamping device comprises an adapter plate 3, a cathode rod 4 and a cathode connecting block 13 which are sequentially connected, wherein the adapter plate 3 is arranged on the outer side of the cathode rod 4, the cathode connecting block 13 is arranged on the inner side of the cathode rod 4, and the inner end of the cathode connecting block 13 is connected with a cathode; the cathode positioning and clamping device is arranged in a left-right symmetrical mode, and the inner ends of the cathode connecting blocks 13 at the left part and the right part are respectively connected with the blade back cathode 8 and the blade basin cathode 12;
the workpiece quick-change device comprises a metal plate 6, a blank positioning block 11, a quick-change reference part 14, a blank positioning block connecting plate 18 and a guide rod 19; the quick-change datum parts 17 are horizontally symmetrical, bases of the quick-change datum parts 17 are rigidly connected with the metal plate 6, the blank positioning block 11 is connected with a blank positioning block connecting plate 18, a clamp head of a workpiece quick-change clamp is mounted on the blank positioning block 11, the clamp head is matched with the base of the quick-change datum part 17 on the metal plate 6, and a guide rod 16 connected with the metal plate 6 is arranged on the blank positioning block connecting plate 18;
the clamp base 2 of the electrolyte guiding device is positioned on the same plane and is provided with three cylindrical channels; the two cylindrical channels are coaxial and are respectively a cathode channel for placing the leaf basin cathode 12 and a cathode channel for placing the leaf back cathode 8, and the other cylindrical channel is perpendicular to the two cathode channels, is positioned between the two cathode channels and is an anode clamp channel.
FIG. 1 shows the blade forming principle of precision electrochemical machining of a large twisted blade. The cathode 12 of the leaf basin and the cathode 8 of the leaf back which are used for electrolytic machining are integrally designed, the cathode 12 of the leaf basin and the cathode 8 of the leaf back are provided with a composite type flow guide section which is formed by combining a metal section and an insulating section, the arrangement of the metal flow guide section 21 can allow the blank allowance to be changed within a larger size range, and the arrangement of the insulating flow guide section can reduce stray corrosion in the machining process to the maximum extent. The end of the guide section of the leaf basin cathode and the leaf back cathode is provided with a bell mouth 22, the width d of the bell mouth 22 is designed according to the allowance of a blank, and simultaneously, when the leaf basin cathode 12 and the leaf back cathode 8 are positioned at the initial processing position, the width d of the bell mouth 22 is not more than the section width of the guide section of the base.
The leaf basin cathode 12 and the leaf back cathode 8 are respectively and rigidly connected with the two feeding shafts, the workpiece blank 10 is arranged in an independent anode clamp, and the leaf basin cathode 12 and the leaf back cathode 8 are linearly fed in opposite directions.
When the cathode 12 of the leaf basin and the cathode 8 of the leaf back reach the designated initial processing position, the machine tool starts to feed liquid, the electrolyte is divided into two parts from the air inlet side flow guide section and flows through the processing areas of the leaf basin and the leaf back respectively, and then flows out from the air outlet side flow guide section. According to the principle of electrolytic machining forming, the metal of the machined surface of the workpiece is dissolved at a high speed according to the shape of the cathode, and finally the machining of the leaf basin, the leaf back, the air inlet edge and the air outlet edge is finished.
Fig. 2 shows a tooling fixture designed for the electrolytic machining of a large-distortion blade, wherein the whole device is fixed on a machine tool by a fixture bottom plate, and the fixture adopts a fully-closed design, so that the leakage of electrolyte in the machining process can be effectively prevented. The fixture base 2 is provided with three cylindrical channels which are positioned on the same plane, two coaxial channels are cathode channels for placing the leaf basin cathode 12 and the leaf back cathode 8, and the other coaxial channel is a channel which is perpendicular to the cathode channels and is used for placing the anode fixture. The clamp base 2 is made of insulating materials, and stray corrosion in the machining process can be effectively reduced. The electrolytic machining clamp for the blades mainly comprises a cathode positioning and clamping device, a workpiece quick-changing device and an electrolyte flow guide device, and is characterized in that:
cathode location clamping device mainly comprises keysets 3, negative pole 4 and negative pole connecting block 13, and negative pole 4 is fixed a position through two pins, and four screw fastenings link to each other with keysets 3, are connected through negative pole connecting block 13 between negative pole and the negative pole 4, and 4 terminal surfaces of negative pole are equipped with two stoppers simultaneously, can realize quick location through the stopper after the negative pole is dismantled, need not the secondary alignment.
As shown in fig. 2 and 3, the workpiece quick-change device mainly comprises a metal plate 6, a blank positioning block 11, a quick-change reference part 17, a blank positioning block connecting plate 18 and a guide rod 19, wherein the blank is positioned and clamped by using an independent anode clamp, and two quick-change reference elements are horizontally and symmetrically arranged on the blank positioning block connecting plate 18, so that the workpiece quick change can be realized under the condition of ensuring higher repeated positioning accuracy, the blade change efficiency is greatly improved, and the change automation is favorably improved.
The electrolyte guiding device mainly comprises a base 2, a leaf basin cathode 12 and a leaf back cathode 8, electrolyte enters a processing area from a base lower guiding section 15 and a cathode air inlet edge guiding section and then flows out from a cathode exhaust edge guiding section and a cathode base upper guiding section 10, a back pressure valve is arranged at a clamp liquid outlet 16, the electrolyte can be prevented from flowing out smoothly by certain back pressure, the processing area is full of the electrolyte, and the electrolyte guiding device enables a processing flow field to be stable.
FIG. 3 shows the working principle of the electrolytic machining of the large twisted blade. The fixture mainly comprises three steps, wherein the workpiece blank 10 is clamped and positioned, the fixture adopts an independent anode fixture, the workpiece blank 10 is arranged on a blank positioning block 11, and then the blank positioning block 11 is positioned and clamped through two quick-change reference elements on the anode fixture. And secondly, clamping and positioning the leaf basin cathode 12 and the leaf back cathode 8, taking the leaf basin cathode 12 as an example, and connecting the leaf basin cathode 12 with the cathode connecting block 13, the cathode rod 4 and the adapter plate 3 in sequence. The cathode rod 4 is provided with an O-shaped sealing ring which is tightly matched with the cylindrical cavity of the base 2 along the cathode feeding direction so as to prevent the leakage of electrolyte in the processing process. After the workpiece blank 10 and the cathode are installed, electrolyte is introduced from a liquid inlet at the lower part of the base 2, the electrolyte is divided into two parts from the air inlet side flow guide section, and the two parts respectively flow through the blade basin and the blade back processing area and then flow out from the air exhaust side flow guide section. The non-processing areas are selectively insulated by epoxy resin, stray corrosion in the processing process is avoided, and the electrolytic processing locality of the blade is improved. Finally, in normal processing, the metal plate 6 is connected with the positive electrode of the power supply, the adapter plate 3 is connected with the negative electrode of the power supply, and the blade basin cathode 12 and the blade back cathode 8 are fed simultaneously to finish the one-step forming of the blade basin, the blade back, the air inlet edge and the air outlet edge.
The utility model discloses a totally closed electrolytic machining frock clamp and wholeization negative pole structural design to combine the compound water conservancy diversion section that metal section and the insulating segment that set up on leaf basin negative pole 12 and the leaf back negative pole 8 combined, make the course of working flow field stable, but the permissible blank surplus changes at great size within range, but the stray corrosion in the furthest reduction course of working simultaneously. The blade basin cathode 12 and the blade back cathode 8 are respectively and rigidly connected with the two feed shafts, and except for a processing surface, the cathodes adopt a full-wrapping type insulation strategy, so that the electrolytic processing locality of the blades is improved.
The blade basin cathode 12 and the blade back cathode 8 are linearly fed in opposite directions, in the machining process, the workpieces and the machine tool feed shaft are uniformly stressed, the service life of the machine tool is prolonged, the different workpieces can be machined only by replacing one set of corresponding tooling, the interchangeability is stronger, the universality is higher, and the method is suitable for batch production of the machine tool.
The utility model discloses can realize the work piece and change the outfit fast with the help of the quick change reference element that sets up on the totally closed frock, greatly improve blade and change the outfit efficiency, be favorable to improving and change the outfit automation. And the blade basin surface, the blade back, the air inlet edge and the air outlet edge can be integrally formed by one-time clamping, so that the electrolytic machining precision and the machining efficiency of the blade are improved.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and any skilled person familiar with the art will not depart from the technical scope of the present invention, and the technical spirit of the present invention will be any simple modification, equivalent replacement, and improvement made by the above embodiments, and the like, all still belong to the technical scope of the present invention.
Claims (7)
1. The utility model provides a big accurate electrolytic machining device of distortion blade which characterized in that: the device comprises a cathode positioning and clamping device, a workpiece quick-changing device and an electrolyte flow guide device; the cathode positioning and clamping device is horizontally and symmetrically arranged on the left side and the right side of the device, the electrolyte guiding device comprises a clamp base, a leaf basin cathode and a leaf back cathode, the leaf basin cathode and the leaf back cathode are connected with the cathode positioning and clamping device, and the clamp base and the workpiece quick-change device are positioned in the center of the device;
the cathode positioning and clamping device comprises an adapter plate, a cathode rod and a cathode connecting block which are sequentially connected, wherein the adapter plate is arranged on the outer side of the cathode rod, the cathode connecting block is arranged on the inner side of the cathode rod, and the inner end of the cathode connecting block is connected with a cathode; the cathode positioning and clamping device is arranged in a left-right symmetrical mode, and the inner ends of the cathode connecting blocks at the left part and the right part are respectively connected with a blade back cathode and a blade basin cathode;
the workpiece quick-change device comprises a metal plate, a blank positioning block, a quick-change reference part, a blank positioning block connecting plate and a guide rod; the quick-change datum parts are horizontally symmetrical, bases of the quick-change datum parts are rigidly connected with a metal plate, the blank positioning block is connected with a blank positioning block connecting plate, a fixture head of a workpiece quick-change fixture is mounted on the blank positioning block, the fixture head is matched with the base of the quick-change datum part on the metal plate, and a guide rod connected with the metal plate is arranged on the blank positioning block connecting plate;
the clamp base of the electrolyte flow guide device is positioned on the same plane and is provided with three cylindrical channels; the two cylindrical channels are coaxial and are respectively a cathode channel for placing a cathode of the leaf basin and a cathode channel for placing a cathode of the leaf back, and the other cylindrical channel is perpendicular to the two cathode channels, is positioned between the two cathode channels and is an anode clamp channel.
2. The large-twist blade precision electrolytic processing device according to claim 1, characterized in that: and the leaf basin cathode and the leaf back cathode are provided with composite type flow guide sections combined by a metal section and an insulating section.
3. The large-twist blade precision electrolytic processing device according to claim 1, characterized in that: and the upper end surface and the lower end surface of the cathode rod are provided with limit blocks.
4. The large-twist blade precision electrolytic processing device according to claim 1, characterized in that: the clearance between blank locating piece and the metal sheet is 0.25mm, seals through the sealing washer.
5. The large-twist blade precision electrolytic processing device according to claim 1, characterized in that: and a back pressure valve is arranged at a liquid outlet of the clamp of the electrolyte flow guiding device.
6. The large-twist blade precision electrolytic processing device according to claim 1, characterized in that: and the tail ends of the flow guide sections of the leaf basin cathode and the leaf back cathode are arranged into bell mouths.
7. The large-twist blade precision electrolytic processing device according to claim 1, characterized in that: the fixture base is made of insulating materials, and three cylindrical channels of the fixture base are all subjected to electrolyte sealing treatment through O-shaped sealing rings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921549666.7U CN210817827U (en) | 2019-09-18 | 2019-09-18 | Precise electrolytic machining device for large-distortion blade |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921549666.7U CN210817827U (en) | 2019-09-18 | 2019-09-18 | Precise electrolytic machining device for large-distortion blade |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110605447A (en) * | 2019-09-18 | 2019-12-24 | 南京浦航机械科技开发有限公司 | Precise electrolytic machining device and process method for large-distortion blade |
| CN111843068A (en) * | 2020-06-30 | 2020-10-30 | 四川聚亿重工有限公司 | Equipment for electrolytic machining |
| 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 |
| CN114682863A (en) * | 2022-03-25 | 2022-07-01 | 南京航空航天大学 | Double-sided combined double-cathode and segmented electricity-control blisk electrolytic machining method |
-
2019
- 2019-09-18 CN CN201921549666.7U patent/CN210817827U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110605447A (en) * | 2019-09-18 | 2019-12-24 | 南京浦航机械科技开发有限公司 | Precise electrolytic machining device and process method for large-distortion blade |
| CN110605447B (en) * | 2019-09-18 | 2024-05-10 | 江苏集萃精密制造研究院有限公司 | Precise electrolytic machining device and process method for large-torsion blade |
| CN111843068A (en) * | 2020-06-30 | 2020-10-30 | 四川聚亿重工有限公司 | Equipment for electrolytic machining |
| 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 |
| CN114682863A (en) * | 2022-03-25 | 2022-07-01 | 南京航空航天大学 | Double-sided combined double-cathode and segmented electricity-control blisk electrolytic machining method |
| CN114682863B (en) * | 2022-03-25 | 2023-09-29 | 南京航空航天大学 | Electrolytic machining method for double-sided combined double-cathode and sectional power control blisk |
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Address after: 211800 building 12-252, 29 buyue Road, Qiaolin street, Pukou District, Nanjing City, Jiangsu Province Patentee after: Jiangsu Jicui Precision Manufacturing Research Institute Co.,Ltd. Address before: 211800 building 12-252, 29 buyue Road, Qiaolin street, Pukou District, Nanjing City, Jiangsu Province Patentee before: Nanjing Puhang Machinery Technology Development Co.,Ltd. |
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