CN110315116B - Technological method for machining side edge of ternary impeller blade milled by cover disc - Google Patents
Technological method for machining side edge of ternary impeller blade milled by cover disc Download PDFInfo
- Publication number
- CN110315116B CN110315116B CN201910467827.6A CN201910467827A CN110315116B CN 110315116 B CN110315116 B CN 110315116B CN 201910467827 A CN201910467827 A CN 201910467827A CN 110315116 B CN110315116 B CN 110315116B
- Authority
- CN
- China
- Prior art keywords
- machining
- impeller
- surface blade
- blade
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B23C3/18—Working surfaces curved in two directions for shaping screw-propellers, turbine blades, or impellers
Abstract
The invention provides a process method for machining a side edge of a ternary impeller blade milled by a cover disc, which comprises the machining processes of clamping and aligning before turning, rough machining before turning, finish machining of a hub and a front edge before turning, finish machining of the blade before turning, milling an alignment plane, clamping after turning, aligning after turning, rough machining after turning, finish machining of the blade of a suction surface after turning, finish machining of the blade of a pressure surface after turning, finish machining of the hub after turning and the like. The technological method for processing the side edge of the ternary impeller blade milled by the cover disc not only can ensure the processing precision of the blade, but also can greatly shorten the processing time of the blade and greatly improve the processing efficiency of the impeller.
Description
Technical Field
The invention relates to the technical field of compressor impeller machining, in particular to a technological method for machining a side edge of a ternary impeller blade by milling a cover disc.
Background
The ternary impeller is an important part in the rotor of the centrifugal compressor and is known as the heart of the compressor. With the gradual improvement of the aerodynamic performance of the impeller, the twisting degree of the blades of the impeller is increased, and the impeller with larger blade twisting can not be machined by the traditional method of milling the shaft disc and welding the cover disc, and is machined by the method of milling the cover disc and then welding the cover disc and the shaft disc.
Referring to fig. 2, when the impeller manufactured by milling the cover disc is machined by using the side cutting edge, the cutter must be machined in the direction of a curved line bundle forming the blade, and the position of the front edge of the blade is limited by a machining angle, so that the main shaft of the cutter is easily interfered with the blade, and the blade cannot be machined.
Therefore, the existing cover disc milling impeller is processed by point milling, and on the premise of ensuring the surface quality of a runner, the cutter tracks for point milling of the blades are very dense, the processing time is long, the efficiency is low, and the cover disc milling impeller becomes an important factor for limiting the productivity of enterprises and influencing the benefits of the enterprises.
Disclosure of Invention
The invention aims to solve the technical problem of providing a process method for machining the side edge of the ternary impeller blade milled by a cover disc with high machining efficiency.
In order to solve the technical problem, the invention provides a process method for machining a side edge of a ternary impeller blade by milling a cover disc, which comprises the following steps:
Turning over and installing a card and aligning: clamping the impeller on the lower part and the upper part according to a shaft coiling line, and performing radial and axial meter reading and alignment on the impeller to find out the processing zero point of the impeller;
Rough machining before turning: roughly machining a flow channel at the air inlet of the impeller, wherein the machining allowance of the flow channel is more than or equal to 0.5 mm;
Finish machining of the hub and the front edge before turning: carrying out fine machining on the front edge of the impeller and the hub;
And (3) turning the front blade for finish machining: dividing the suction surface blade area into a suction surface blade area close to the front edge and a suction surface blade residual area by using an isoparametric line, and performing finish machining on the suction surface blade area close to the front edge by adopting a point milling machining mode;
Milling and aligning a plane: the angle of a rotating shaft of the workbench is reset to zero, and a horizontal alignment plane is milled at the position of the outer circle of the impeller;
Turning and clamping: re-clamping the upper and lower positions of the cover coil line according to the shaft coil line;
Alignment after turning: the axial and radial positions of the impeller are marked, the processing zero point of the impeller is found, the alignment plane of the impeller is marked, and the rotating shaft is compensated, so that the impeller is repositioned in the circumferential direction;
Rough machining after turning: roughly machining the impeller flow channel, wherein the rough machining allowance is greater than or equal to 0.5 mm;
Finishing the blade of the turned-back suction surface: carrying out side edge milling finish machining on the remaining area of the suction surface blade by using a side edge milling machining mode;
Finish machining of the turned pressure surface blade: dividing a pressure surface blade area into a pressure surface blade area close to the front edge and a pressure surface blade residual area by using an isoparametric line, performing finish machining on the pressure surface blade area close to the front edge by adopting a point milling machining mode, and performing finish machining on the pressure surface blade residual area by using a side edge machining mode;
Finish machining of the turned hub: and performing finish machining on the impeller hub.
Further, the suction surface blade area is divided into a suction surface blade area close to the front edge and a suction surface blade remaining area by using the isoparametric line, wherein the suction surface blade area close to the front edge accounts for 20% of the suction surface blade area, and the suction surface blade remaining area accounts for 80% of the suction surface blade area.
Further, the pressure surface blade area is divided into a pressure surface blade area close to the front edge and a pressure surface blade residual area by using the isoparametric line, wherein the pressure surface blade area close to the front edge accounts for 20% of the pressure surface blade area, and the pressure surface blade residual area accounts for 80% of the pressure surface blade area.
According to the cover disc milling ternary impeller blade side edge processing process method, the suction surface blade area and the pressure surface blade area of the blade are divided into two areas by using isoparametric lines, the suction surface blade area close to the front edge and the pressure surface blade area close to the front edge are processed by adopting a point milling mode, and the suction surface blade residual area and the pressure surface blade residual area are processed by using a side edge milling mode, so that the processing precision of the blade can be guaranteed, the processing time of the blade can be greatly shortened, and the processing efficiency of the impeller can be greatly improved.
Drawings
FIG. 1 is a flow chart of a process for machining a side edge of a ternary impeller blade milled by a cover disc according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating interference between a main shaft of a cutter and blades when side blades are machined in a cover disk milling impeller blade in the prior art;
Fig. 3 is a schematic view of an impeller front turning clamping in the process method for machining the side edge of the ternary impeller blade milled by the cover disk according to the embodiment of the present invention;
Fig. 4 is a schematic diagram illustrating a process method for machining a side edge of a ternary impeller blade milled by a cover disk, in which an isoparametric line is used to divide the blade into two regions;
Fig. 5 is a schematic diagram of an impeller after turning and clamping in the process method for machining the side edge of the ternary impeller blade by milling the cover disc provided by the embodiment of the invention.
Detailed Description
Referring to fig. 1, the process method for machining the side edge of the ternary impeller blade milled by the cover disc provided by the embodiment of the invention comprises the following steps:
Turning over and installing a card and aligning: clamping the impeller on the lower part and the upper part according to a shaft coiling line, and performing radial and axial meter reading and alignment on the impeller to find out the processing zero point of the impeller;
Rough machining before turning: roughly machining a flow channel at the air inlet of the impeller, wherein the machining allowance of the flow channel is more than or equal to 0.5 mm;
Finish machining of the hub and the front edge before turning: carrying out fine machining on the front edge of the impeller and the hub;
And (3) turning the front blade for finish machining: dividing the suction surface blade area into a suction surface blade area close to the front edge and a suction surface blade residual area by using an isoparametric line, and performing finish machining on the suction surface blade area close to the front edge by adopting a point milling machining mode;
Milling and aligning a plane: the angle of a rotating shaft of the workbench is reset to zero, and a horizontal alignment plane is milled at the position of the outer circle of the impeller;
Turning and clamping: re-clamping the upper and lower positions of the cover coil line according to the shaft coil line;
Alignment after turning: the axial and radial positions of the impeller are marked, the processing zero point of the impeller is found, the alignment plane of the impeller is marked, and the rotating shaft is compensated, so that the impeller is repositioned in the circumferential direction;
Rough machining after turning: roughly machining the impeller flow channel, wherein the rough machining allowance is greater than or equal to 0.5 mm;
Finishing the blade of the turned-back suction surface: carrying out side edge milling finish machining on the remaining area of the suction surface blade by using a side edge milling machining mode;
Finish machining of the turned pressure surface blade: dividing a pressure surface blade area into a pressure surface blade area close to the front edge and a pressure surface blade residual area by using an isoparametric line, performing finish machining on the pressure surface blade area close to the front edge by adopting a point milling machining mode, and performing finish machining on the pressure surface blade residual area by using a side edge machining mode;
Finish machining of the turned hub: and performing finish machining on the impeller hub.
The suction surface blade area is divided into a suction surface blade area close to the front edge and a suction surface blade residual area by utilizing the isoparametric line, wherein the suction surface blade area close to the front edge accounts for 20% of the suction surface blade area, and the suction surface blade residual area accounts for 80% of the suction surface blade area.
The pressure surface blade area is divided into a pressure surface blade area close to the front edge and a pressure surface blade residual area by utilizing the isoparametric line, wherein the pressure surface blade area close to the front edge accounts for 20% of the pressure surface blade area, and the pressure surface blade residual area accounts for 80% of the pressure surface blade area.
The technical method for machining the side edge of the ternary impeller blade milled by the cover disk, which is provided by the invention, is specifically explained by taking the impeller milled by the cover disk with the diameter of 900mm as an example.
(1) And turning over the front and installing the card. Referring to fig. 3, the impeller is clamped at the position with the shaft coiled line at the lower part and the cover coiled line at the upper part, the radial and axial directions of the impeller are marked and aligned, and the processing zero point of the impeller is searched.
(2) And (5) rough machining before turning. And (4) roughly processing a flow channel at the air inlet, wherein the allowance of the flow channel is more than or equal to 0.5 mm.
(3) Turning over the front wheel hub and finishing the front edge. The leading edge and the hub are finish machined.
(4) And (5) performing finish machining on the blade before turning. Referring to fig. 4, the suction surface blade is divided by using an iso-reference line, the blade is divided into 20% of the area close to the front edge and the remaining 80% of the area, and the 20% of the area of the suction surface blade close to the front edge is finished by adopting a point milling processing mode.
(5) And milling and aligning a plane. And the angle of a rotating shaft of the workbench returns to zero, and a horizontal alignment plane is milled at the position of the outer circle of the impeller.
(6) And turning over and then installing the card. Referring to fig. 5, the impeller is turned 180 degrees around the horizontal coordinate axis, and the chucking is carried out again at the position where the axis is coiled up and the cover is coiled down.
(7) And (6) aligning after turning over. And (4) performing surface printing on the axial position and the radial position of the impeller, and searching the processing zero point of the impeller. And (4) calibrating the alignment plane of the impeller, and compensating the rotating shaft to reposition the impeller in the circumferential direction.
(8) And (5) turning and then roughly processing. And (4) roughly machining the impeller flow channel, wherein the rough machining allowance is greater than or equal to 0.5 mm.
(9) And (5) finishing the blade of the suction surface after turning. And performing side edge milling finish machining on the remaining 80% of the area of the suction surface blade by using a side edge milling machining mode.
(10) And (5) turning the back pressure surface blade for finish machining. Dividing the pressure surface blade by using an isoparametric line, dividing the blade into 20% of the area close to the front edge and the remaining 80%, and finishing the pressure surface blade area 20% of the area close to the front edge by using a point milling processing mode. And finishing the remaining 80% of the pressure surface blade area by using a side edge machining mode.
(11) And (5) turning the hub and performing finish machining. And performing finish machining on the impeller hub.
The impeller is milled by the cover plate with the diameter of 900mm, if the processing time for processing the whole blade by the original point milling processing mode is about 2 hours, the time for processing the blade is shortened to about half an hour by adopting the process method for processing the side edge of the three-element impeller blade milled by the cover plate, the processing time is obviously shortened on the premise of ensuring the processing precision, and the processing efficiency of the impeller is greatly improved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (3)
1. A technological method for processing side edges of ternary impeller blades milled by a cover disc is characterized by comprising the following steps:
Turning over and installing a card and aligning: clamping the impeller on the lower part and the upper part according to a shaft coiling line, and performing radial and axial meter reading and alignment on the impeller to find out the processing zero point of the impeller;
Rough machining before turning: roughly machining a flow channel at the air inlet of the impeller, wherein the machining allowance of the flow channel is more than or equal to 0.5 mm;
Finish machining of the hub and the front edge before turning: carrying out fine machining on the front edge of the impeller and the hub;
And (3) turning the front blade for finish machining: dividing the suction surface blade area into a suction surface blade area close to the front edge and a suction surface blade residual area by using an isoparametric line, and performing finish machining on the suction surface blade area close to the front edge by adopting a point milling machining mode;
Milling and aligning a plane: the angle of a rotating shaft of the workbench is reset to zero, and a horizontal alignment plane is milled at the position of the outer circle of the impeller;
Turning and clamping: re-clamping the upper and lower positions of the cover coil line according to the shaft coil line;
Alignment after turning: the axial and radial positions of the impeller are marked, the processing zero point of the impeller is found, the alignment plane of the impeller is marked, and the rotating shaft is compensated, so that the impeller is repositioned in the circumferential direction;
Rough machining after turning: roughly machining the impeller flow channel, wherein the rough machining allowance is greater than or equal to 0.5 mm;
Finishing the blade of the turned-back suction surface: carrying out side edge milling finish machining on the remaining area of the suction surface blade by using a side edge milling machining mode;
Finish machining of the turned pressure surface blade: dividing a pressure surface blade area into a pressure surface blade area close to the front edge and a pressure surface blade residual area by using an isoparametric line, performing finish machining on the pressure surface blade area close to the front edge by adopting a point milling machining mode, and performing finish machining on the pressure surface blade residual area by using a side edge machining mode;
Finish machining of the turned hub: and performing finish machining on the impeller hub.
2. The process method for machining the side edge of the ternary impeller blade milled by the cover disc according to claim 1, wherein the process method comprises the following steps: the suction surface blade area is divided into a suction surface blade area close to the front edge and a suction surface blade residual area by utilizing the isoparametric line, wherein the suction surface blade area close to the front edge accounts for 20% of the suction surface blade area, and the suction surface blade residual area accounts for 80% of the suction surface blade area.
3. The process method for machining the side edge of the ternary impeller blade milled by the cover disc according to claim 1, wherein the process method comprises the following steps: the pressure surface blade area is divided into a pressure surface blade area close to the front edge and a pressure surface blade residual area by utilizing the isoparametric line, wherein the pressure surface blade area close to the front edge accounts for 20% of the pressure surface blade area, and the pressure surface blade residual area accounts for 80% of the pressure surface blade area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910467827.6A CN110315116B (en) | 2019-05-31 | 2019-05-31 | Technological method for machining side edge of ternary impeller blade milled by cover disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910467827.6A CN110315116B (en) | 2019-05-31 | 2019-05-31 | Technological method for machining side edge of ternary impeller blade milled by cover disc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110315116A CN110315116A (en) | 2019-10-11 |
| CN110315116B true CN110315116B (en) | 2020-07-31 |
Family
ID=68119249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910467827.6A Active CN110315116B (en) | 2019-05-31 | 2019-05-31 | Technological method for machining side edge of ternary impeller blade milled by cover disc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110315116B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111136309B (en) * | 2020-01-10 | 2021-11-05 | 贵阳航发精密铸造有限公司 | Method for processing triple blades into double blades |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216748A (en) * | 2016-08-04 | 2016-12-14 | 苏州千机智能技术有限公司 | Open type integrated impeller blade milling method |
| CN109304505A (en) * | 2018-10-17 | 2019-02-05 | 沈阳透平机械股份有限公司 | A kind of rough milling method of 3 d impeller |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20021876A1 (en) * | 2002-09-03 | 2004-03-04 | Nuovo Pignone Spa | IMPROVED PROCEDURE FOR MAKING A ROTOR OF ONE |
| CN101670465B (en) * | 2009-09-30 | 2011-06-15 | 中国北车集团大连机车研究所有限公司 | Method for machining round head blade of wind guide wheel of supercharger |
| CN102489761B (en) * | 2011-12-22 | 2013-05-08 | 上海交通大学 | High-efficiency machining method for half-open centrifugal type integral impeller with long and short blades |
| CN103056625B (en) * | 2012-12-29 | 2015-04-15 | 中国人民解放军总参谋部第六十研究所 | Integral impeller 5-axis machining method based on UG NX system platform |
| WO2015002066A1 (en) * | 2013-07-04 | 2015-01-08 | 株式会社Ihi | Compressor impeller, centrifugal compressor, machining method for compressor impeller, and machining apparatus for compressor impeller |
| CN103631197B (en) * | 2013-10-25 | 2016-08-17 | 北京交通大学 | Skew ruled surface blade-side cutter spindle vector program method |
| CN107052419A (en) * | 2017-01-03 | 2017-08-18 | 东北大学 | A kind of Milling Motion in Three-axes NC milling method and device of variable cross-section twisted blade half-opened impeller |
| CN108405941B (en) * | 2018-02-28 | 2020-02-18 | 上海交通大学 | Efficient precise milling method for blade body profile of aero-engine blade |
| CN109570591A (en) * | 2019-01-08 | 2019-04-05 | 湘潭大学 | Centrifugal impeller cutting working method and device and centrifugal impeller process equipment |
-
2019
- 2019-05-31 CN CN201910467827.6A patent/CN110315116B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216748A (en) * | 2016-08-04 | 2016-12-14 | 苏州千机智能技术有限公司 | Open type integrated impeller blade milling method |
| CN109304505A (en) * | 2018-10-17 | 2019-02-05 | 沈阳透平机械股份有限公司 | A kind of rough milling method of 3 d impeller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110315116A (en) | 2019-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7637010B2 (en) | Methods for machining turbine engine components | |
| JP5352482B2 (en) | Manufacturing method of blisk type rotor wheel tip | |
| US7007382B2 (en) | Slot machining | |
| CN102489761B (en) | High-efficiency machining method for half-open centrifugal type integral impeller with long and short blades | |
| US11890683B2 (en) | Method of grinding a parting/grooving insert and a parting/grooving insert | |
| CN110315116B (en) | Technological method for machining side edge of ternary impeller blade milled by cover disc | |
| US10589339B2 (en) | Method for manufacturing blisk, and blisk intermediate product | |
| CN111077849B (en) | Self-adaptive machining method for integral impeller of five-axis numerical control machine tool | |
| JP2012093250A (en) | Rotation balance correction method and rotation balance correction machine | |
| CN115592467A (en) | Blisk ring finish machining tool mark receiving control method and system based on-machine measurement | |
| CN110253066B (en) | Top cutter identification and elimination method for five-axis plunge milling of integral impeller | |
| CN108153968B (en) | Modeling method of K-shaped groove of ternary blade | |
| CN113828838A (en) | Method for machining key groove of inner hole of large impeller | |
| CN102350522B (en) | Processing method of numerical control milling machine with tiltable main shaft | |
| US10280781B2 (en) | Turbine shroud milling | |
| CN110076378A (en) | A method of FV520B material 3 d impeller is finished with solid carbide | |
| CN110439853B (en) | Design method for integrally milling closed impeller of centrifugal compressor | |
| CN111037242A (en) | Finish machining method for ternary impeller | |
| CN112247742B (en) | Method and equipment for machining blade top of movable blade of axial flow compressor | |
| CN111151795B (en) | Method and device for machining impeller blade of centrifugal compressor | |
| CN110883342B (en) | Processing method of single-stage blade of air-cooled steam turbine generator | |
| CN114594730B (en) | Numerical control programming method for ultrasonic cutting of straight blade tip knife | |
| CN117124027B (en) | Blade forming and manufacturing method and blade | |
| CN112276496B (en) | Method for solving deformation of low-pressure turbine disc in machining process | |
| CN114029708B (en) | Processing technology of diffuser air flow channel and digital milling clamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |