CN114986102B - Outer guide ring and forming method thereof - Google Patents
Outer guide ring and forming method thereof Download PDFInfo
- Publication number
- CN114986102B CN114986102B CN202210753137.9A CN202210753137A CN114986102B CN 114986102 B CN114986102 B CN 114986102B CN 202210753137 A CN202210753137 A CN 202210753137A CN 114986102 B CN114986102 B CN 114986102B
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- forming
- spinning
- cone
- outer guide
- conical cylinder
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/06—Removing local distortions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/01—Aircraft parts
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses an outer guide ring and a forming method thereof, wherein the forming comprises the following steps: machining a blank for machining the outer guide ring into a conical cylinder; spinning and forming from the inside of the conical cylinder, and spinning a triangular ring groove to obtain a first part blank; annealing the first part blank; performing fine sizing on the annealed first part blank by adopting a male and female die swelling process, and processing the triangular ring groove to the size of a finished product to obtain a second part blank; and removing machining allowance at two ends of the second part blank to obtain a finished product of the outer guide ring. The invention solves the problems of easy wrinkling, cracking or complex process by adopting other forming methods, and has the advantages of high forming precision, stable process and high production efficiency.
Description
Technical Field
The invention belongs to the field of aeroengine manufacturing, and particularly relates to an outer guide ring and a forming method thereof.
Background
The outer guide ring of the casing in the combustion chamber of the aeroengine is a plate forming piece, the material is a deformed nickel-based superalloy, the main body of the guide ring is of a large taper annular structure, the middle section of a bus is outwards convex, the longitudinal section is approximately triangular, an annular groove with an opening centripetal is formed, the three-dimensional structure is shown in figure 1, and the longitudinal section is shown in figure 2. The part has a large taper (taper angle greater than 30 degrees) and the triangular ring groove 2 is difficult to form. If roll forming is adopted, the axial component force of the roller can lead the part to deflect to one side due to the large taper of the part and asymmetric structure, and the part cannot be formed smoothly. If the split die is adopted for expansion forming, the axial component force of the expansion valve can squeeze the part to the small end due to the large taper of the part, so that the busbar is bent and deformed, and the small end is easy to wrinkle; meanwhile, the edges on two sides of the expansion valve form indentations on the groove wall. If liquid filling, swelling and forming are adopted, the sealing is complex, and the forming efficiency is low. If the soft male die is adopted for inflation forming, the annular groove is too deep, the radial deformation of the soft male die is large, the required extrusion force is large, the contact friction between the molded surface of the part and the wall of the die groove is increased, the flow resistance of the material is increased, and the groove bottom is easy to break.
Disclosure of Invention
The invention aims to solve the problem that an outer guide ring of a casing in a combustion chamber of an aeroengine is difficult to process in the prior art, and aims to provide the outer guide ring and a forming method thereof.
The technical scheme adopted by the invention is as follows:
the forming method of the outer guide ring comprises the following steps:
machining a blank for machining the outer guide ring into a conical cylinder;
spinning and forming from the inside of the conical cylinder, and spinning a triangular ring groove to obtain a first part blank;
annealing the first part blank;
performing fine sizing on the annealed first part blank by adopting a male and female die swelling process, and processing the triangular ring groove to the size of a finished product to obtain a second part blank;
and removing machining allowance at two ends of the second part blank to obtain a finished product of the outer guide ring.
Preferably, the process of machining the blank for machining the outer guide ring into the cone comprises:
cutting a blank for processing the outer guide ring into a fan-shaped plate blank;
rolling the fan-shaped plate blank into a half cone;
two half cone barrels are welded into a cone barrel.
Preferably, the forming method of the outer guide ring of the present invention further comprises:
polishing the welded seam of the spliced and welded conical cylinder, annealing the conical cylinder, and using the annealed conical cylinder for spin forming.
Preferably, the cone angle of the cone is the same as that of the finished outer guide ring, and the height of the cone is larger than that of the finished outer guide ring.
Preferably, when the inside of the conical cylinder is spin-formed, the expansion allowance is reserved for the surface diameter of the triangular ring groove.
Preferably, ordinary spinning is adopted when the interior of the conical cylinder is spun and formed; the die adopts a split die so that the part can be demolded after spinning.
Preferably, when the inside of the conical cylinder is spun and formed, the parts are pressed by a plurality of uniformly distributed fan-shaped pressing plates on the inner conical surfaces of the conical cylinders adjacent to the two ends of the triangular ring grooves, and the degree of the pressing is required to meet the following conditions: the materials at the two ends of the triangular ring groove can smoothly flow to the triangular ring groove in the spinning process;
when the inside of the conical cylinder is subjected to spinning forming, the movement track of the spinning roller is two straight lines, wherein the first straight line moves from the small end of the conical cylinder to the bottom of the triangular ring groove along the wall surface of the triangular ring groove, and the second straight line moves from the large end of the conical cylinder to the bottom of the triangular ring groove along the wall surface of the triangular ring groove.
Preferably, forming and trimming margins are reserved at two ends of the conical cylinder.
Preferably, the forming and trimming margins of the large end of the cone are greater than those of the small end.
The invention also provides an outer guide ring which is processed by the forming method.
The invention has the following beneficial effects:
in the forming method of the outer guide ring, the conical cylinder is adopted to form in a whole ring state, spinning forming is carried out from the inside of the conical cylinder, and the spinning roller continuously rolls along the molded surface, so that the molded surface quality is good. The cone cylinder is positioned in the spinning die, is firmly pressed, cannot be extruded by the spinning roller, and has small distortion after forming. The contact area of the spinning roller and the spinning surface is small, the spinning is continuously fed, the spinning force is small and concentrated, and the groove wall is not easy to break. The split male die with the female die is adopted for bulging and shape correction, and the molded surface of the corrected part has high precision.
Furthermore, the fan-shaped plate blank is adopted for rolling and welding, the welding surface is smooth, the joint misalignment amount and the welding gap are easy to control, and the welding seam quality is stable.
Drawings
FIG. 1 is a schematic view of the outer baffle ring of a case in a combustion chamber of a certain type of aircraft engine;
FIG. 2 is a longitudinal section of an outer baffle ring of a casing within a combustion chamber of an aircraft engine;
FIG. 3 is a schematic view of a cut fanned blank in accordance with an embodiment of the invention;
FIG. 4 is a schematic view of a cone welded according to an embodiment of the present invention;
FIG. 5 is a schematic longitudinal cross-sectional view of a finished part according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the final structural dimensions of the part (outer guide ring) according to an embodiment of the present invention.
In the figure, the air conditioner comprises a 1-outer guide ring, a 2-triangular ring groove, a 3-fan-shaped plate blank and a 4-conical cylinder.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Referring to fig. 1-6, the invention provides a combined process method of spinning preforming and yin-yang die swelling fine correction aiming at the structural characteristics of large taper of a guide ring, triangular longitudinal section of a ring groove and centripetal notch, solves the problems of easy wrinkling, cracking or complex process of other forming methods, and has high forming precision, stable process and high production efficiency.
The processing technology of the outer guide ring specifically comprises the following steps:
1) And cutting and blanking the plates to obtain 2 fan-shaped plate blanks, as shown in fig. 3.
2) And rolling the 2 fan-shaped plate blanks into 1 semi-conical cylinder respectively.
3) The 2 half cone barrels are spliced and welded into a complete cone barrel (the shape of the complete cone barrel is a truncated cone shape and is called as a cone barrel in the industry), as shown in fig. 4, the welding seam is required to be treated after the welding is finished, and the surface of the welding seam is required to be flat and smooth.
4) And annealing the conical cylinder after welding, wherein the aim of the annealing is mainly to eliminate welding stress, and the specific temperature can be determined according to the material of the conical cylinder and the welding mode.
5) The method comprises the steps of spinning forming from the inside of a conical cylinder, spinning to form a triangular ring groove 2, wherein the profile diameter of the part is provided with a fine-correction bulging allowance, the specific allowance is required to be determined according to the material of an outer guide ring part, the specific allowance is related to the elastoplasticity of the conical cylinder, the relatively feasible bulging allowance can be obtained through multiple tests, particularly, a split die is adopted during spinning forming so that the part can be demolded after spinning, 6-8 uniformly distributed fan-shaped pressing plates are adopted to press the conical cylinder on the inner conical surfaces of the conical cylinder adjacent to the two ends of the triangular ring groove 2 during spinning, the pressing force is required to be proper, the pressing plates are stuck on the inner conical surfaces of the conical cylinder, so that materials at the two ends of the triangular ring groove 2 can smoothly flow to the ring groove during spinning, the radius of a spinning wheel is determined according to the transfer radius of the bottom of the triangular ring groove 2, and the gap between the spinning wheel and the profile of a die is the thickness of a blank during spinning. When the inside of the conical cylinder is subjected to spinning forming, the movement track of the spinning roller is two straight lines, the first straight line moves from the small end of the conical cylinder to the bottom of the triangular ring groove 2 along the wall surface of the triangular ring groove 2, and the second straight line moves from the large end of the conical cylinder to the bottom of the triangular ring groove 2 along the wall surface of the triangular ring groove 2, so that the bottom of the triangular ring groove can be prevented from being broken by the spinning mode.
6) And (3) annealing the part obtained by the rotary forming, wherein the aim of the annealing is mainly to eliminate cold work hardening generated by the rotary forming, recover the plasticity of the material, and the specific temperature can be determined according to the material of the conical cylinder, and recrystallization annealing or softening annealing can be adopted.
7) And then, adopting a male and female die swelling process to carry out fine shaping on the part, and ensuring the precision of the molded surface of the part.
8) And (5) turning and cutting off the margins at the two ends, ensuring the axial dimension of the part, and obtaining the final external guide ring part.
Examples
The forming method of the outer guide ring in the embodiment comprises the following steps:
cutting and blanking: cutting a fan-shaped blank, wherein the material is GH3536 deformed nickel-based superalloy, and the thickness of the plate is 0.8mm. The cut blank is shaped and sized as shown in fig. 3. 2 fanning blanks machined 1 part.
And (3) rolling: the 2 sector blanks are respectively rolled into 1 half cone.
Welding: the 2 half cones are splice welded into a complete cone as shown in fig. 4. The small end is left with a 10mm forming and trimming allowance, and the large end is left with a 20mm forming and trimming allowance. Polishing the surface of the welded seam after welding to make the welded seam and the substrate smooth and even.
And (3) heat treatment: and (3) annealing by heat treatment, eliminating welding stress and improving welding plasticity.
Spinning and preforming: the shape of the formed part is shown in figure 5, 8 uniformly distributed fan-shaped pressing plates are adopted on adjacent inner conical surfaces at two ends of the triangular ring groove 2 to press the conical cylinder during spinning, the ordinary spinning is adopted during spinning, the movement track of the spinning roller is 2 straight lines, the 1 st part moves from the small end of the conical cylinder to the bottom of the groove along the wall surface of the triangular ring groove, the 2 nd part moves from the large end of the conical cylinder to the bottom of the groove along the wall surface of the triangular ring groove, the spindle speed of the machine tool is 30-40 r/min during spinning, and the feeding ratio of the spinning roller is 0.5-0.8 mm. The profile diameter size is 2-3 mm fine correction allowance on the basis of fig. 5. The two ends are respectively provided with trimming allowance of 5 mm.
And (3) heat treatment: annealing by heat treatment, eliminating work hardening and recovering the plasticity of the material.
Fine shaping: and the female die and the male die are adopted for swelling and fine sizing, the molded surface precision of the part is ensured, the shape and the size of the longitudinal section after fine sizing are shown in figure 5, and the two ends are respectively reserved with trimming allowance of 5 mm. The female die adopts a 2-split die with an annular die frame, and the male die adopts an 8-split die consisting of 8 sector expansion blocks. During fine correction, the part is clamped between the female die and the male die, and the correction precision is high.
Two ends of the vehicle: the trimming allowance of the two ends is removed by turning, and the diameter size and the axial size of the two ends of the part are ensured, as shown in figure 6.
And finally checking.
Claims (4)
1. The forming method of the outer guide ring is characterized by comprising the following steps:
machining a blank for machining the outer guide ring into a conical cylinder;
spinning and forming from the inside of the conical cylinder to obtain a triangular ring groove (2) to obtain a first part blank;
annealing the first part blank;
performing fine sizing on the annealed first part blank by adopting a male and female die swelling process, and processing the triangular ring groove (2) to a finished product size to obtain a second part blank;
removing machining allowance at two ends of the second part blank to obtain a finished product outer guide ring;
the process of machining the blank for machining the outer guide ring into the cone comprises the following steps:
cutting a blank for processing the outer guide ring into a fan-shaped plate blank;
rolling the fan-shaped plate blank into a half cone;
welding two half cone barrels into a cone barrel;
the forming method of the outer guide ring further comprises the following steps:
polishing the welded seam of the spliced cone cylinder, then carrying out stress relief annealing on the cone cylinder, and using the cone cylinder subjected to the stress relief annealing for spin forming;
the cone angle of the cone cylinder is the same as that of the finished outer guide ring, and the height of the cone cylinder is larger than that of the finished outer guide ring;
when the inside of the conical cylinder is subjected to spinning forming, the expansion allowance is reserved on the profile diameter at the triangular ring groove (2);
when the interior of the conical cylinder is subjected to spinning forming, common spinning is adopted, and a split die is adopted as a die;
when the inside of the conical cylinder is subjected to spinning forming, the conical cylinder is pressed by a plurality of uniformly distributed fan-shaped pressing plates on the inner conical surface of the conical cylinder adjacent to the two ends of the triangular ring groove (2), and the degree of the pressing is required to meet the following conditions: in the spinning process, materials at two ends of the triangular ring groove (2) can smoothly flow to the triangular ring groove (2);
when the inside of the conical cylinder is subjected to spinning forming, the movement track of the spinning roller is two straight lines, wherein the first straight line moves from the small end of the conical cylinder to the bottom of the triangular ring groove (2) along the wall surface of the triangular ring groove (2), and the second straight line moves from the large end of the conical cylinder to the bottom of the triangular ring groove (2) along the wall surface of the triangular ring groove (2).
2. A method of forming an outer baffle ring as set forth in claim 1 wherein said cone leaves a forming and trimming margin at both ends.
3. A method of forming an outer deflector ring as claimed in claim 2, wherein the forming and trimming margins of the large end of the cone are greater than the forming and trimming margins of the small end.
4. An outer deflector ring manufactured by the method of forming an outer deflector ring according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210753137.9A CN114986102B (en) | 2022-06-29 | 2022-06-29 | Outer guide ring and forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210753137.9A CN114986102B (en) | 2022-06-29 | 2022-06-29 | Outer guide ring and forming method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114986102A CN114986102A (en) | 2022-09-02 |
| CN114986102B true CN114986102B (en) | 2023-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210753137.9A Active CN114986102B (en) | 2022-06-29 | 2022-06-29 | Outer guide ring and forming method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889744A (en) * | 2016-06-07 | 2016-08-24 | 浙江东星汽车部件有限公司 | Spinning flange ring and forming technology thereof |
| CN106111773A (en) * | 2016-08-29 | 2016-11-16 | 中航动力股份有限公司 | A kind of spin forming method of aero-engine compressor stator internal ring |
| CN108916360A (en) * | 2018-09-28 | 2018-11-30 | 浙江东星汽车部件有限公司 | A kind of not isometrical single slot belt pulley of abnormity and its manufacturing method |
| CN110064897A (en) * | 2019-04-30 | 2019-07-30 | 中国航发南方工业有限公司 | Aviation components spinning part blank machining process |
| CN114029396A (en) * | 2021-10-22 | 2022-02-11 | 中国航空制造技术研究院 | Forming method of complex curved bus overall structure annular part |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4418168B2 (en) * | 2003-05-14 | 2010-02-17 | 本田技研工業株式会社 | Manufacturing method of elliptical ring |
| BRPI0506739A (en) * | 2004-01-07 | 2007-05-15 | Wheels India | unit construction wheels and their method of manufacture |
-
2022
- 2022-06-29 CN CN202210753137.9A patent/CN114986102B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889744A (en) * | 2016-06-07 | 2016-08-24 | 浙江东星汽车部件有限公司 | Spinning flange ring and forming technology thereof |
| CN106111773A (en) * | 2016-08-29 | 2016-11-16 | 中航动力股份有限公司 | A kind of spin forming method of aero-engine compressor stator internal ring |
| CN108916360A (en) * | 2018-09-28 | 2018-11-30 | 浙江东星汽车部件有限公司 | A kind of not isometrical single slot belt pulley of abnormity and its manufacturing method |
| CN110064897A (en) * | 2019-04-30 | 2019-07-30 | 中国航发南方工业有限公司 | Aviation components spinning part blank machining process |
| CN114029396A (en) * | 2021-10-22 | 2022-02-11 | 中国航空制造技术研究院 | Forming method of complex curved bus overall structure annular part |
Non-Patent Citations (1)
| Title |
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| "某型航空发动机导流环旋压成形工艺研究";刘振岗 等;;《新技术新工艺》(第2期);16-18 * |
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| CN114986102A (en) | 2022-09-02 |
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