CN114192857B - Cutter for machining aero-engine impeller - Google Patents
Cutter for machining aero-engine impeller Download PDFInfo
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- CN114192857B CN114192857B CN202111507112.2A CN202111507112A CN114192857B CN 114192857 B CN114192857 B CN 114192857B CN 202111507112 A CN202111507112 A CN 202111507112A CN 114192857 B CN114192857 B CN 114192857B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a cutter for machining an aircraft engine impeller, which comprises a cutter bar, wherein a rough cutter part is arranged at the bottom of the cutter bar, positioning grooves are formed in two sides of the top end of the cutter bar, a conical cutter part is arranged on the rough cutter part, a spherical part is arranged at the bottom of the conical cutter part, the conical cutter part comprises a conical milling cutter body, a plurality of second thread grooves, a plurality of flat cutting angles, a V-shaped groove and a connecting rod, a limiting mechanism is arranged above the connecting rod, the spherical part comprises a sphere, two connecting grooves and four reinforcing ribs, and the limiting mechanism comprises a sliding groove, four pressing grooves, four pressing blocks, a limiting groove, an elastic sheet and a fixing nail. According to the invention, by utilizing the arrangement mode that the cutter bar, the thick cutter part, the conical cutter part and the spherical part are matched, different parts of the impeller can be respectively precisely machined through the numerical control milling lathe under the condition of not replacing the cutter, the machining efficiency and precision of the impeller of the aero-engine are improved, and the conical cutter part is more stably used and stored through the limiting mechanism.
Description
Technical Field
The invention relates to the field of impeller machining, in particular to a cutter for machining an aircraft engine impeller.
Background
The turbine impeller is a rotary power machine for converting the energy of a flowing working medium into mechanical work, and is one of main parts of an aeroengine, a gas turbine, a steam turbine, an automobile and a ship turbocharger, the whole structure of the aeroengine impeller is complex, the profile of a blade is a complex free curved surface, the torsion degree is large, the requirement on the processing precision is high, a channel between adjacent blades is deep and narrow, the whole impeller is made of difficult-to-process materials such as titanium alloy, high-temperature alloy and the like, the blade is thin and the blade profile is complex, so that the processing of the whole impeller is difficult, the existing five-shaft linkage numerical control milling has the advantages of quick response, high reliability, good processing flexibility, short production preparation period and the like, the turbine impeller is widely applied in the field of manufacturing of the aeroengine impeller, and can perform milling modes such as side milling, plunge milling, cycloid milling and the like according to different processing positions of the impeller.
Because the existing aircraft engine impeller is generally processed by using the ball end milling cutter in the processing process, the existing ball end milling cutter has a simple structure, and cannot simultaneously process a large-scale surface with a flat straight surface and a flat three-dimensional surface, when the large-scale surface is processed in a five-axis linkage numerical control milling processing lathe, a cutter needs to be replaced according to different surfaces of the impeller, and the overall processing efficiency and accuracy are influenced.
Disclosure of Invention
The invention aims to provide a tool for machining an aircraft engine impeller, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a cutter for machining an aircraft engine impeller comprises a cutter bar, wherein a thick cutter part is arranged at the bottom of the cutter bar, positioning grooves are formed in two sides of the top end of the cutter bar, a conical cutter part is arranged on the thick cutter part, and a spherical part is arranged at the bottom of the conical cutter part;
the conical cutter part comprises a conical milling cutter body, a plurality of second thread grooves, a plurality of flat cutting angles, a V-shaped groove and a connecting rod, and a limiting mechanism is arranged above the connecting rod;
the spherical part comprises a sphere, two connecting grooves and four reinforcing ribs;
the limiting mechanism comprises a sliding groove, four pressing grooves, four pressing blocks, a limiting groove, an elastic sheet and a fixing nail, wherein the two sides of the elastic sheet are connected with the inner cavities of the two adjacent pressing grooves in a sliding and penetrating mode.
Preferably, the roughing cutting portion includes a flat-bottom end mill body, a plurality of first thread grooves and a plurality of corrugated grooves, and the plurality of first thread grooves are arranged in an annular array at the bottom of the flat-bottom end mill body.
Preferably, four strengthening ribs are fixedly connected with the bottom end of the conical milling cutter body in an annular array, and two adjacent strengthening ribs are fixedly connected with two ends of the connecting groove.
Preferably, a plurality of corrugated grooves are equidistantly formed in the outer wall of the flat-bottom end mill body, and the sliding groove is formed in the middle of the flat-bottom end mill body.
Preferably, the ball body is fixedly connected with the bottom end of the conical milling cutter body, and the two connecting grooves are formed in two sides of the outer wall of the ball body.
Preferably, the tapered milling cutter body is in sliding connection with an inner cavity of the sliding groove, and the four pressing grooves are formed in two sides of the outer wall of the cutter bar respectively.
Preferably, the pressing block is slidably connected with an inner cavity of the pressing groove, and the limiting groove is formed in the top of the connecting rod.
Preferably, the elastic sheet is connected with the inner cavity of the limiting groove in a sliding and penetrating manner, and the elastic sheet is fixedly connected with the inner wall of the limiting groove through a fixing nail.
Preferably, the top end of the connecting rod is fixedly connected with a sliding rod, and the sliding rod is in sliding penetrating connection with the top of the cutter bar.
Preferably, a plurality of the second thread grooves are arranged on the outer wall of the tapered milling cutter body in an annular array, a plurality of the flat cutting angles are arranged on the outer portion of the bottom end of the tapered milling cutter body in an annular array, and the V-shaped groove is arranged between two adjacent second thread grooves.
The invention has the technical effects and advantages that:
(1) According to the invention, by utilizing the arrangement mode that the cutter bar, the thick cutter part, the conical cutter part and the spherical part are matched, different parts of the impeller can be respectively precisely machined by the numerical control milling lathe under the condition of not changing the cutter, so that the machining efficiency and precision of the impeller of the aero-engine are improved, and the conical cutter part is more stably used and accommodated by the limiting mechanism;
(2) According to the invention, the flat-bottom end mill body, the first thread groove and the corrugated groove are matched, so that the fixed shaft of the impeller flow channel is conveniently subjected to rough machining, the machining efficiency of the impeller flow channel is improved, the arc line of the impeller flow channel is conveniently subjected to rough machining through the conical mill body, the second thread groove and the flat cutting angle, and the machining of the arc line of the flow channel is smoother through the high-speed rotation of the V-shaped groove;
(3) According to the invention, by utilizing the arrangement mode that the ball body, the connecting groove and the reinforcing rib are matched, the rigidity strength of the cutting edge at the bottom of the conical milling cutter body is conveniently improved by connecting the ball body, the reinforcing rib and the bottom of the conical milling cutter body, meanwhile, the blades, the blade roots and the like of the impeller are conveniently and finely processed, and the processing efficiency and the processing accuracy are improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the overall front partial sectional structure of the present invention.
Fig. 3 is a schematic view of the overall overhead structure of the present invention.
FIG. 4 is an enlarged view of a portion A of FIG. 2 according to the present invention.
FIG. 5 is an enlarged view of a portion of the structure shown at B in FIG. 2 according to the present invention.
Fig. 6 is a schematic view of the front structure of the ball head of the present invention.
In the figure: 1. a cutter bar; 2. a roughing cutter part; 201. a flat-bottom end mill body; 202. a first thread groove; 203. a corrugated trough; 3. positioning a groove; 4. a taper cutter portion; 401. a conical milling cutter body; 402. a second thread groove; 403. flat cutting corners; 404. a V-shaped groove; 405. a connecting rod; 5. a spherical portion; 501. a sphere; 502. connecting grooves; 503. reinforcing ribs; 6. a limiting mechanism; 601. a chute; 602. pressing the groove; 603. a pressing block; 604. a limiting groove; 605. a spring plate; 606. fixing nails; 7. a slide bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a cutter for machining an aircraft engine impeller as shown in figures 1-6, which comprises a cutter bar 1, wherein positioning grooves 3 are formed in two sides of the top end of the cutter bar 1, and are convenient to be clamped and fixed with a cutter interface on a machine tool in a fine manner, so that the cutter bar 1 can rotate, a thick cutter part 2 is arranged at the bottom of the cutter bar 1, the thick cutter part 2 comprises a flat-bottom end mill body 201, a plurality of first thread grooves 202 and a plurality of corrugated grooves 203, the plurality of first thread grooves 202 are arranged at the bottom of the flat-bottom end mill body 201 in an annular array manner, the arrangement angle of the first thread grooves 202 is 50 degrees, the outer wall of the flat-bottom end mill body 201 is a 50-degree spiral blade band, the rough machining of a runner of the impeller is facilitated, the machining efficiency of the fixed axis of the runner of the impeller is higher, the plurality of corrugated grooves 203 are equidistantly arranged on the outer wall of the flat-bottom end mill body 201, so that the blade band is in a corrugated tooth-shaped structure, and the anti-breakage performance of the flat-bottom end mill body 201 in the rough machining process is improved, so that the impeller is more convenient and the machining efficiency of the material which is difficult to be machined is improved;
the rough cutter part 2 is provided with a conical cutter part 4, the conical cutter part 4 comprises a conical milling cutter body 401, a plurality of second thread grooves 402, a plurality of flat cutting angles 403, a V-shaped groove 404 and a connecting rod 405, the opening angle of the second thread grooves 402 is 30-35 degrees, chips of a milling surface are separated when the milling surface is milled by opening the plurality of second thread grooves 402, the influence of the chips on the continuous processing of the conical milling cutter body 401 is reduced, the accuracy of the conical milling cutter body 401 is higher, the plurality of second thread grooves 402 are opened on the outer wall of the conical milling cutter body 401 in an annular array, the plurality of flat cutting angles 403 are opened outside the bottom end of the conical milling cutter body 401 in an annular array, the V-shaped grooves 404 are opened between two adjacent second thread grooves 402, the processing accuracy of the conical milling cutter body 401 is higher, the processing accuracy of the conical milling cutter body 401 is more accurate, the processing accuracy of the conical milling cutter body 401 is more convenient, the small cutting angles 403 are more accurate, and the chips are more convenient to grind the impeller through the small cutting angles and the small cutting angles, and the impeller is more convenient to grind;
the bottom of the conical cutter part 4 is provided with a spherical part 5, the spherical part 5 comprises a sphere 501, two connecting grooves 502 and four reinforcing ribs 503, the sphere 501 is fixedly connected with the bottom end of the conical milling cutter body 401 so as to reduce the passivation phenomenon at the bottom of the conical milling cutter body 401 through the sphere 501, the two connecting grooves 502 are arranged at two sides of the outer wall of the sphere 501, the connecting grooves 502 are arc-shaped structures, the corners of the connecting grooves 502 are sharp structures, so that the outer wall of the sphere 501 forms arc-shaped micro cutting edges, the four reinforcing ribs 503 are in annular arrays and are fixedly connected with the bottom end of the conical milling cutter body 401, and the other ends of the reinforcing ribs 503 are in annular arrays and are fixedly connected with the outer wall of the sphere 501, the reinforcing ribs 503 are used for improving the rigidity of the bottom of the conical milling cutter body 401 and reducing the wear passivation of the conical milling cutter body 401, two adjacent reinforcing ribs 503 are fixedly connected with two ends of the connecting groove 502, the arc shape of the reinforcing ribs 503 and the inner cavity of the connecting groove 502 form a continuous arc structure, so that blades, blade roots and the like of an impeller can be finely ground conveniently, the machined surface is smooth and neat, no burr is generated, the machining efficiency and the machining accuracy are improved, and the flat-bottom end milling cutter body 201, the conical milling cutter body 401 and the sphere 501 are all superfine hard alloy substrates and have excellent wear resistance;
a limiting mechanism 6 is arranged above the connecting rod 405, the limiting mechanism 6 comprises a sliding groove 601, four pressing grooves 602, four pressing blocks 603, a limiting groove 604, an elastic sheet 605 and a fixing nail 606, the sliding groove 601 is arranged in the middle of the flat-bottom end mill body 201, the conical mill body 401 is slidably connected with an inner cavity of the sliding groove 601, the connecting rod 405 is slidably inserted and connected with the inner cavity of the sliding groove 601, the limiting groove 604 is arranged at the top of the connecting rod 405, the elastic sheet 605 is slidably inserted and connected with the inner cavity of the limiting groove 604, the elastic sheet 605 is fixedly connected with the inner wall of the limiting groove 604 through the fixing nail 606, the bottom of the elastic sheet 605 is conveniently fixed, when the elastic sheet 605 rotates along with the connecting rod 405, the position deviation phenomenon cannot occur, two sides of the elastic sheet 605 are slidably inserted and connected with the inner cavities of two adjacent pressing grooves 602, the four pressing grooves 602 are respectively arranged at two sides of the outer wall of the cutter bar 1, the pressing blocks 603 are slidably connected with the inner cavities of the pressing grooves 602, the top ends and the bottom ends of the pressing blocks 603 are fixedly connected with movable blocks, the top ends of the pressing blocks 603, the top of the pressing blocks 603 can be conveniently pushed and pushed out the elastic sheet 603, the top of the connecting rod 603 can be conveniently pushed out by the conical milling cutter body, and the elastic sheet 405, and the elastic sheet 401 can be conveniently pushed out by the pressing blocks, the elastic sheet 603;
top fixedly connected with slide bar 7 of connecting rod 405, slide bar 7 is connected with the top sliding interlude of cutter arbor 1, be convenient for through pressing of slide bar 7, make the slip of connecting rod 405 more convenient, and the equal fixedly connected with fixture block in both sides of slide bar 7, the equal fixedly connected with draw-in groove in both sides at spout 601 inner wall top, the fixture block is connected with the inner chamber sliding interlude of draw-in groove, be convenient for through the position of fixture block and draw-in groove inject, make the slip of slide bar 7 more stable, be convenient for connecting rod 405 can stabilize the inner chamber slip at spout 601, make shell fragment 605 stabilize under self elasticity with the inner chamber sliding interlude of pressing groove 602, make the use of toper milling cutter body 401 more stable, and the outer wall of flat-bottom end mill body 201, the outer wall of toper milling cutter body 401 and the outer wall of spheroid 501 all cover and have nitrogen titanium aluminide coating, be convenient for reinforcing the antifriction of cutter, high temperature and corrosion resisting performance.
The working principle of the invention is as follows:
when the impeller is machined on a five-axis linkage numerical control milling machining lathe, the outer wall of the flat-bottom end mill body 201 is in a spiral blade band through the arrangement of the first thread groove 202, the cutting edges on the blade band are corrugated through the arrangement of the corrugated groove 203, the rough machining of a large-area impeller flow channel fixed shaft is facilitated, the machining efficiency of an impeller flow channel is improved, after the flow channel of the impeller is determined, two pressing blocks 603 are pressed to enable two sides of the elastic sheet 605 to slide out of inner cavities of two pressing grooves 602, the connecting rod 405 slides in the inner cavity of the sliding groove 601 through the pressing of the sliding rod 7, the sliding stability of the connecting rod 405 is facilitated through the connection of the clamping grooves and the clamping blocks, the elastic sheet 605 can be stably inserted into the inner cavities of the other two pressing grooves 602 in a sliding mode, one end of the conical mill body 401 can conveniently stretch out of the bottom of the flat-bottom end mill body 201, the length of the cutter is lengthened, and the small gap can be conveniently machined, the bottom of the conical milling cutter body 401 is in a conical structure through the arrangement of the flat cutting angle 403, the rough machining of different parts of the impeller and the stable machining of narrow small positions of some blades are facilitated, through spheroid 501 fixed with toper milling cutter body bottom 401, be convenient for prevent the passivation of toper milling cutter body 401 bottom, improve the blade intensity to toper milling cutter body 401, be connected through strengthening rib 503 and toper milling cutter body 401 bottom, be convenient for improve the rigidity intensity of toper milling cutter body 401 bottom blade department, set up through spread groove 502, make spheroid 501's outer wall form the little cutting edge of arc, be convenient for carry out carefully-processing to the blade of impeller and blade root etc., make the machined surface smooth neat, and no burr, the accuracy of machining efficiency and processing is improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The cutter for machining the impeller of the aero-engine comprises a cutter bar (1) and is characterized in that a coarse cutter portion (2) is arranged at the bottom of the cutter bar (1), positioning grooves (3) are formed in two sides of the top end of the cutter bar (1), a conical cutter portion (4) is arranged on the coarse cutter portion (2), and a spherical portion (5) is arranged at the bottom of the conical cutter portion (4);
the taper cutter part (4) comprises a taper milling cutter body (401), a plurality of second thread grooves (402), a plurality of flat cutting angles (403), a V-shaped groove (404) and a connecting rod (405), the taper milling cutter body (401) is connected with an inner cavity of the sliding groove (601) in a sliding mode, and a limiting mechanism (6) is arranged above the connecting rod (405);
the spherical part (5) comprises a sphere (501), two connecting grooves (502) and four reinforcing ribs (503);
stop gear (6) contain spout (601), four press groove (602), four press according to briquetting (603), spacing groove (604), shell fragment (605) and staple (606), four press groove (602) to set up respectively in the both sides of cutter arbor (1) outer wall, press briquetting (603) and the inner chamber sliding connection who presses groove (602), the top of connecting rod (405) is set up in spacing groove (604), the both sides of shell fragment (605) and the inner chamber sliding interlude of two adjacent press groove (602) are connected, shell fragment (605) and the inner chamber sliding interlude of spacing groove (604) are connected, shell fragment (605) passes through the inner wall fixed connection of staple (606) and spacing groove (604).
2. The tool for machining an aircraft engine impeller according to claim 1, characterized in that the roughing portion (2) comprises a flat-bottomed end mill body (201), a plurality of first thread flutes (202) and a plurality of corrugation flutes (203), the plurality of first thread flutes (202) opening in an annular array at the bottom of the flat-bottomed end mill body (201).
3. The tool for machining an aircraft engine impeller according to claim 2, wherein four reinforcing ribs (503) are fixedly connected with the bottom end of the conical milling cutter body (401) in an annular array, and two adjacent reinforcing ribs (503) are fixedly connected with two ends of the connecting groove (502).
4. The tool for machining an aircraft engine impeller according to claim 2, characterized in that a plurality of the corrugated flutes (203) open at equal intervals to an outer wall of the flat-bottom end mill body (201), the sliding grooves (601) opening in a middle portion of the flat-bottom end mill body (201).
5. The tool for machining an impeller of an aircraft engine as claimed in claim 1, wherein the sphere (501) is fixedly connected with a bottom end of the conical milling cutter body (401), and two connecting grooves (502) are formed on two sides of an outer wall of the sphere (501).
6. The tool for machining an aircraft engine impeller as claimed in claim 1, characterized in that a sliding rod (7) is fixedly connected to the top end of the connecting rod (405), and the sliding rod (7) is slidably inserted into the top of the cutter bar (1).
7. The tool for machining an aircraft engine impeller as claimed in claim 1, characterized in that a plurality of the second thread grooves (402) open in an annular array on an outer wall of the conical milling cutter body (401), a plurality of the flat cutting corners (403) open in an annular array outside a bottom end of the conical milling cutter body (401), and the V-shaped groove (404) opens between two adjacent second thread grooves (402).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111507112.2A CN114192857B (en) | 2021-12-10 | 2021-12-10 | Cutter for machining aero-engine impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111507112.2A CN114192857B (en) | 2021-12-10 | 2021-12-10 | Cutter for machining aero-engine impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114192857A CN114192857A (en) | 2022-03-18 |
| CN114192857B true CN114192857B (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111507112.2A Active CN114192857B (en) | 2021-12-10 | 2021-12-10 | Cutter for machining aero-engine impeller |
Country Status (1)
| Country | Link |
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| CN (1) | CN114192857B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008019332A1 (en) * | 2008-04-16 | 2009-10-22 | Rolls-Royce Deutschland Ltd & Co Kg | Method for milling blisks |
| DE112008003975B4 (en) * | 2008-08-29 | 2016-04-28 | Osg Corporation | Throwaway rotary cutting tool |
| CN103611974B (en) * | 2013-11-28 | 2016-06-01 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of large-scale axial flow type integral impeller processing method |
| CN110976995A (en) * | 2019-12-23 | 2020-04-10 | 东方电气集团东方汽轮机有限公司 | Jumbo size blade root finish milling cutter |
| CN213317931U (en) * | 2020-09-15 | 2021-06-01 | 常州市精尔锐工具制造有限公司 | Flat-bottom milling cutter with 45-degree edge |
| CN214920839U (en) * | 2021-07-21 | 2021-11-30 | 复谦工具(苏州)有限公司 | Tapered ball milling cutter for machining leaf disc |
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2021
- 2021-12-10 CN CN202111507112.2A patent/CN114192857B/en active Active
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| Publication number | Publication date |
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| CN114192857A (en) | 2022-03-18 |
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