CN115351563A - Clamp for milling blisk - Google Patents
Clamp for milling blisk Download PDFInfo
- Publication number
- CN115351563A CN115351563A CN202210884081.0A CN202210884081A CN115351563A CN 115351563 A CN115351563 A CN 115351563A CN 202210884081 A CN202210884081 A CN 202210884081A CN 115351563 A CN115351563 A CN 115351563A
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- Prior art keywords
- base
- cover plate
- milling
- blisk
- quick
- 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.)
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Links
- 238000003801 milling Methods 0.000 title claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000003754 machining Methods 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 235000015220 hamburgers Nutrition 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
Abstract
The application provides a milling clamp for a blisk, belongs to the technical field of aero-engines, and particularly comprises a cover plate and a base which are symmetrically arranged, wherein the base and the cover plate are both of a circular structure, a part to be machined is placed between the cover plate and the base, a machining part of the part to be machined is exposed out of the outer side of the part to be machined, and the cover plate and the base are fixedly clamped through a connecting piece; the cover plate and the base are both provided with quick-change device mechanisms, one of the two quick-change device mechanisms is matched with the processing machine tool, and when a part to be processed needs to be turned over, the other one of the two quick-change device mechanisms is changed into the other one to be matched with the processing machine tool; the cover plate and the base are both provided with angular positioning precision balls which are used for positioning the position of the part to be processed. By the processing scheme, the milling step caused by overlarge angular deviation is avoided, and the milling accuracy is improved; the clamping and dismounting are convenient, the processing preparation time is shortened, and the production efficiency is improved.
Description
Technical Field
The application relates to the technical field of aero-engines, in particular to a fixture for milling a blisk ring.
Background
The integral vane ring is a key part of a novel integral structure adopted by an advanced aero-engine and is an important component of the aero-engine. The closed integral blade ring consists of three parts: inner ring, outer loop, blade and runner belong to complicated integrated thin wall structure. Due to the limitation of the inner ring structure and the outer ring structure, the milling cutter can only process the blades from the air inlet and the air outlet in opposite directions, if the milling of the blades is finished by clamping the part once, a main shaft of a machine tool collides with a shaft in an interference manner during the milling, and therefore the blade profile milling of the integral blade ring needs two times of turning processing; the traditional clamping method is to locate the inner ring or the outer ring of the part in the circular direction, compress the part by adopting a plurality of pressure plates, completely expose the air inlet edge or the air exhaust edge on the outer side, and manually disassemble the part and turn the part over for clamping after allowance is milled. The blisk belongs to a thin-walled part, after large allowance is removed, the part is elastically deformed to different degrees by cutting force, the part is deformed to different degrees due to the recovery of the elastic deformation and the machining error of the part and the residual stress existing in machining are added, so that the part is deformed to different degrees, plane and circular run-out are out of tolerance when the part is aligned by turning, manual alignment is needed, the preparation period is prolonged, and uncertain factors exist; in addition, the clamping system has inherent angular errors, so that a certain deviation exists in a two-time milling coordinate system, the step of the position of a cutter connecting in the middle of milling is overlarge, the quality of the cutter connecting is difficult to guarantee, and great difficulty is brought to subsequent polishing and size precision guarantee.
Disclosure of Invention
In view of this, the embodiment of the application provides a blisk ring milling fixture for milling and clamping an aero-engine blisk ring by quickly turning over, so that an angular error caused by manually disassembling a part for turning over and clamping is prevented from causing that a milling middle step is too large, and the part is prevented from being scrapped.
The embodiment of the application provides a fixture for milling a blisk, which comprises a cover plate and a base which are symmetrically arranged, wherein the base and the cover plate are both of a circular structure, a part to be machined is placed between the cover plate and the base, a machining part of the part to be machined is exposed outside, and the cover plate and the base are fixedly clamped through a connecting piece; the cover plate and the base are both provided with quick-change device mechanisms, one of the two quick-change device mechanisms is matched with a processing machine tool, and when the part to be processed needs to be turned over, the other one of the quick-change device mechanisms is matched with the processing machine tool; the cover plate and the base are provided with angular positioning precision balls, and the angular positioning precision balls are used for positioning the position of the part to be processed.
According to a specific implementation manner of the embodiment of the application, the quick-change device mechanism comprises a plurality of pull nails, and the cover plate and the pull nails on the base are both vertically connected.
According to a specific implementation manner of the embodiment of the application, the number of the pull nails is six, one of the pull nails is arranged at the center of the cover plate/the base, and the rest five pull nails are circumferentially and uniformly distributed.
According to a concrete implementation mode of the embodiment of the application, the base is provided with a positioning pin, the positioning pin is aligned with a pin hole of the part to be processed and clamped, and the positioning pin is used for limiting the rotation of the part to be processed.
According to a concrete implementation mode of this application embodiment, the angular positioning precision ball set up in the base with the circumference side of apron, just the angular orientation of angular positioning precision ball with the angular orientation of locating pin is the same.
According to a concrete implementation mode of this application embodiment, the apron with the symmetry is equipped with the bolt hole on the base, the screw hole centers on the peripheral circumference of quick change device mechanism evenly arranges, the apron with pass through between the base the connecting piece passes the bolt hole carries out fixing clamping.
According to a specific implementation manner of the embodiment of the application, the connecting piece is installed in the bolt hole in a sinking mode.
According to a specific implementation manner of the embodiment of the application, the connecting piece is arranged to be a hexagonal cylinder head connecting screw.
According to a specific implementation manner of the embodiment of the application, the bolt hole is set to be an M12 bolt hole.
Advantageous effects
The blisk ring milling fixture in the embodiment of the application adopts a hamburger type fixed part, rapidly finishes twice clamping of the part and a machine tool through a quick-change device mechanism, does not need to disassemble the part, ensures that the deformation of the part is controllable and consistent after large allowance milling, avoids the occurrence of a cutter receiving step in the middle cutter receiving position due to the fact that the deformation of the disassembled part and the angular difference of the turnover secondary clamping are caused, and improves the milling accuracy.
The invention adopts two angular positioning precision ball structures, before the first milling of the part, the precision ball position at the front end is measured to determine an A-axis coordinate system of the part, and when the part is rapidly turned, clamped and milled, the precision ball position at the rear end is measured and adjusted according to the result, so that the consistency of the coordinate systems of the front and the rear processing is ensured, and the milling step caused by overlarge angular deviation is avoided.
The fixture has the advantages of simple structure, convenient clamping and dismounting, shortened processing preparation time and improved production efficiency, and the processing tool has strong universality, can be widely applied to processing of the same type and large batch of integral vane rings, and is suitable for popularization and use in the field.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a perspective view of a blisk milling fixture according to one embodiment of the present invention;
FIG. 2 is a perspective view of a blisk ring milling fixture in accordance with an embodiment of the present invention;
FIG. 3 is a top view of a blisk milling fixture according to an embodiment of the present invention;
FIG. 4 is a side view of a blisk ring milling fixture according to an embodiment of the present invention;
FIG. 5 is an enlarged view at L in FIG. 3;
FIG. 6 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 3;
FIG. 7 is a sectional view taken along line B-B of FIG. 3;
FIG. 8 is a schematic view of a fixture for milling a blisk in cooperation with a machine tool according to an embodiment of the present invention.
In the figure: 1. a quick change device mechanism; 2. a cover plate; 3. a part to be processed; 4. angular positioning precision balls; 5. a base; 6. the hexagonal cylindrical head is connected with a screw; 7. bolt holes; 8. positioning pins; 9. the inner circle end face of the part; 10. an inner circle; 11. the clamp is matched with the machine tool.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The application is capable of other and different embodiments and its several details are capable of modifications and various changes in detail without departing from the spirit of the application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. 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 application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be further noted that the drawings provided in the following embodiments are only schematic illustrations of the basic concepts of the present application, and the drawings only show the components related to the present application rather than the numbers, shapes and dimensions of the components in actual implementation, and the types, the numbers and the proportions of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides a fixture for milling a blisk ring, which is described in detail with reference to fig. 1 to 8.
Referring to fig. 1 to 4, the fixture comprises a cover plate 2 and a base 5 which are symmetrically arranged, the base 5 and the cover plate 2 are both of a circular structure, a part 3 to be machined is placed between the cover plate 2 and the base 5, a machining part of the part 3 to be machined is exposed outside, and the cover plate 2 and the base 5 are fixedly clamped through a connecting piece. The cover plate 2 and the base 5 are both provided with quick-change device mechanisms 1, one of the two quick-change device mechanisms 1 is matched with a processing machine tool, and when the part 3 to be processed needs to be turned over, the other one of the quick-change device mechanisms 1 is matched with the processing machine tool; the cover plate 2 and the base 5 are provided with angular positioning precision balls 4, and the angular positioning precision balls 4 are used for positioning the position of the part 3 to be processed.
Furthermore, the quick-change device mechanism 1 comprises a plurality of blind rivets, and the cover plate 2 and the blind rivets on the base 5 are both vertically connected. In this embodiment, through lathe pneumatic means control, anchor clamps pass through the blind rivet and are connected with the lathe, when lathe and anchor clamps assembly, refer to anchor clamps and lathe fitting surface 11 in 8, the whole of anchor clamps is vertical placing, and the blind rivet that is located one side is connected with the lathe, when waiting to process part 3 and having processed one side, only need dismantle whole anchor clamps get off, it can with the lathe to trade the blind rivet of opposite side and be connected, need not to dismantle and wait to process part 3, guarantee that the quick turn-over of part mills, can guarantee the accurate location between anchor clamps and lathe.
Preferably, the number of the pull nails is six, one of the pull nails is arranged in the center of the cover plate 2/the base 5, and the other five pull nails are uniformly distributed in the circumferential direction of phi 272.
In the above embodiment, a quick-change device in a form of a hamburger is adopted to fix the part 3 to be processed between the tooling base 5 and the cover plate 2, the part to be processed is exposed outside, in order to limit the rotation of the part 3 to be processed, the base 5 is provided with the positioning pin 8, referring to fig. 5, the positioning pin 8 is aligned and clamped with the pin hole of the part 3 to be processed, the positioning pin 8 is used for limiting the rotation of the part 3 to be processed, the positioning and pressing effects of the part are realized by matching with the connecting piece between the base 5 and the cover plate 2, the limitation of the degree of freedom of the part in the axial direction is realized at the same time, and the transverse sliding of the part is limited by radial positioning. In order to ensure the positioning and pressing requirements of the parts, the tolerance of the fit clearance between the radial positioning part and the parts is within 0.03 mm.
In one embodiment, the angular positioning precision balls 4 are disposed on the circumferential side surfaces of the base 5 and the cover plate 2, referring to fig. 4 and 7, and the angular directions of the angular positioning precision balls 4 are the same as the angular directions of the positioning pins 8, that is, the angular positioning precision balls 4 on the base 5 and the cover plate 2 are symmetrically disposed and are the same as the angular directions of the positioning pins 8. After the part is turned and clamped, the position of the angular positioning precision ball 4 is measured to ensure that the turning angle is consistent with the preorder process step.
In one embodiment, the cover plate 2 and the base 5 are symmetrically provided with bolt holes 7, the threaded holes are uniformly arranged around the periphery of the quick-change device mechanism 1, and the cover plate 2 and the base 5 are fixedly clamped through the bolt holes 7 through the connecting piece. In order to avoid interference of the connecting element during milling, the connecting element is mounted in the bolt hole 7 in a sunk manner, see fig. 6 and 7.
Preferably, the connecting member is provided as a hexagonal socket head connecting screw 6, and it should be noted that the form of the connecting member is not limited to that listed in the present embodiment, and is selected according to the connection between the cover plate 2 and the base plate 5.
Preferably, the bolt hole 7 is provided as an M12 bolt hole.
When in actual clamping, the end face 9 of the inner circle of the part 3 to be processed and the inner circle 10 are used as positioning faces, refer to fig. 7, the part 3 to be processed is installed on the base 5, the positioning pin 8 and the pin hole of the part 3 to be processed are aligned and clamped, the part is limited to rotate, the cover plate 2 of the clamping fixture is fixed, then the part and the fixture are fixed by the hexagonal cylindrical head connecting screw 6, a hamburger clamping mode is formed, the positioning and pressing effect of the part are achieved, the limitation of the degree of freedom of the part in the axial direction is achieved, and the transverse sliding of the part is limited by radial positioning. Through the control of a machine tool pneumatic device, the clamp is connected with the machine tool through the quick change device mechanism 1, the part does not need to be disassembled, the rapid turnover milling of the part is ensured, and the accurate positioning between the clamp and the machine tool is ensured; when one side of a part 3 to be machined is milled, an A-axis coordinate system for machining the part is ensured by measuring the position of an angular positioning precision ball 4; when the other side of the part is milled by turning, clamping and milling, the position of the angular positioning precision ball 4 on the other side is measured and adjusted according to the result, so that the front and back processing coordinate systems are kept consistent, and the milling step caused by overlarge angular deviation is avoided.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. The milling clamp for the blisk ring is characterized by comprising a cover plate and a base which are symmetrically arranged, wherein the base and the cover plate are both of a circular structure, a part to be machined is placed between the cover plate and the base, a machining part of the part to be machined is exposed outside, and the cover plate and the base are fixedly clamped through a connecting piece; the cover plate and the base are both provided with quick-change device mechanisms, one of the two quick-change device mechanisms is matched with a processing machine tool, and when the part to be processed needs to be turned over, the other one of the quick-change device mechanisms is matched with the processing machine tool; the cover plate and the base are provided with angular positioning precision balls, and the angular positioning precision balls are used for positioning the position of the part to be processed.
2. The fixture for milling machining of a blisk according to claim 1, wherein said quick-change mechanism includes a plurality of pull nails, said pull nails on said cover plate and said base being vertically connected.
3. The blisk milling fixture according to claim 2, wherein the number of said pull nails is six, one of said pull nails being disposed in the center of said cover plate/said base, and the remaining five of said pull nails being circumferentially uniformly distributed.
4. The clamp for milling the blisk according to claim 1, wherein a positioning pin is arranged on the base and aligned with and clamped in a pin hole of the part to be machined, and the positioning pin is used for limiting the rotation of the part to be machined.
5. The fixture for milling the blisk according to claim 4, wherein the angular positioning precision balls are arranged on the circumferential side faces of the base and the cover plate, and the angular directions of the angular positioning precision balls are the same as those of the positioning pins.
6. The fixture for milling the blisk ring according to claim 1, wherein bolt holes are symmetrically formed in the cover plate and the base, the threaded holes are evenly arranged around the periphery of the quick-change device mechanism in the circumferential direction, and the cover plate and the base are fixedly clamped through the bolt holes through the connecting piece.
7. The blisk milling fixture of claim 6, wherein said attachment member is counter-sunk into said bolt hole.
8. The clamp for milling machining of a blisk ring according to claim 6 or 7, characterized in that said connection member is provided as a hexagonal socket head connection screw.
9. The blisk milling fixture according to claim 6 or 7, wherein the bolt holes are configured as M12 bolt holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210884081.0A CN115351563A (en) | 2022-07-26 | 2022-07-26 | Clamp for milling blisk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210884081.0A CN115351563A (en) | 2022-07-26 | 2022-07-26 | Clamp for milling blisk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115351563A true CN115351563A (en) | 2022-11-18 |
Family
ID=84032685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210884081.0A Pending CN115351563A (en) | 2022-07-26 | 2022-07-26 | Clamp for milling blisk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115351563A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3327575A (en) * | 1965-03-17 | 1967-06-27 | Minster Machine Co | Quick change fixture |
| CN102554825A (en) * | 2011-12-23 | 2012-07-11 | 四川亚美动力技术有限公司 | Turbine blade assembling insurance clamp and method for performing impeller clamping thereof |
| US20150273640A1 (en) * | 2014-03-28 | 2015-10-01 | Pratt & Whitney Canada Corp. | Positioning assembly and method |
| CN207139349U (en) * | 2017-09-15 | 2018-03-27 | 烟台万隆真空冶金股份有限公司 | A kind of processing tool of large thin-wall cylindrical element |
| CN107962222A (en) * | 2017-11-24 | 2018-04-27 | 中国航发沈阳黎明航空发动机有限责任公司 | The Milling Machining deformation controller in hole and method of a kind of conical thin-wall part |
| CN108809005A (en) * | 2018-06-12 | 2018-11-13 | 中车永济电机有限公司 | A kind of direct driving motor stator turn mandrel |
| CN109202502A (en) * | 2018-10-25 | 2019-01-15 | 西安航天发动机有限公司 | A kind of engine expansion segment slotting attachment and application method |
| CN111331391A (en) * | 2020-02-26 | 2020-06-26 | 恩欣格工程塑料（上海）有限公司 | A parcel formula clamping anchor clamps for clamping thin wall work piece |
| CN111957993A (en) * | 2020-09-02 | 2020-11-20 | 一重集团(黑龙江)重工有限公司 | Deformation-preventing auxiliary tool for large-diameter thin-wall cylinder |
-
2022
- 2022-07-26 CN CN202210884081.0A patent/CN115351563A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3327575A (en) * | 1965-03-17 | 1967-06-27 | Minster Machine Co | Quick change fixture |
| CN102554825A (en) * | 2011-12-23 | 2012-07-11 | 四川亚美动力技术有限公司 | Turbine blade assembling insurance clamp and method for performing impeller clamping thereof |
| US20150273640A1 (en) * | 2014-03-28 | 2015-10-01 | Pratt & Whitney Canada Corp. | Positioning assembly and method |
| CN207139349U (en) * | 2017-09-15 | 2018-03-27 | 烟台万隆真空冶金股份有限公司 | A kind of processing tool of large thin-wall cylindrical element |
| CN107962222A (en) * | 2017-11-24 | 2018-04-27 | 中国航发沈阳黎明航空发动机有限责任公司 | The Milling Machining deformation controller in hole and method of a kind of conical thin-wall part |
| CN108809005A (en) * | 2018-06-12 | 2018-11-13 | 中车永济电机有限公司 | A kind of direct driving motor stator turn mandrel |
| CN109202502A (en) * | 2018-10-25 | 2019-01-15 | 西安航天发动机有限公司 | A kind of engine expansion segment slotting attachment and application method |
| CN111331391A (en) * | 2020-02-26 | 2020-06-26 | 恩欣格工程塑料（上海）有限公司 | A parcel formula clamping anchor clamps for clamping thin wall work piece |
| CN111957993A (en) * | 2020-09-02 | 2020-11-20 | 一重集团(黑龙江)重工有限公司 | Deformation-preventing auxiliary tool for large-diameter thin-wall cylinder |
Non-Patent Citations (1)
| Title |
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| 李建国，张敬: "《数控电切削加工实训教程》", 电子科技大学出版社, pages: 285 * |
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