CN113579533A - Pre-control method for radial precision of electron beam welding structure after blisk welding - Google Patents
Pre-control method for radial precision of electron beam welding structure after blisk welding Download PDFInfo
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- CN113579533A CN113579533A CN202110959023.5A CN202110959023A CN113579533A CN 113579533 A CN113579533 A CN 113579533A CN 202110959023 A CN202110959023 A CN 202110959023A CN 113579533 A CN113579533 A CN 113579533A
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- 238000003466 welding Methods 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010894 electron beam technology Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000003754 machining Methods 0.000 abstract description 17
- 238000005242 forging Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/006—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to using of neural networks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/0046—Welding
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- Evolutionary Computation (AREA)
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Abstract
A pre-control method for radial precision of an electron beam welded structure blisk after welding belongs to the technical field of machining. The method for pre-controlling the radial precision of the welded integral blade ring of the electron beam welding structure comprises the following steps: s1, calculating a pre-compensation value before welding of the blade ring; s2, calculating a pre-compensation value of the radius of the blade ring before welding; s3, calculating the diameter of the blade ring before welding; s4, calculating the arc length of each single blade; s5, manufacturing the single blade according to the calculated arc length of each single blade; and S6, welding the single blades into blade rings. The method for pre-controlling the radial precision of the welded integral blade ring of the electron beam welding structure reduces the influence of welding deformation on the precision of parts, ensures that uniform machining allowance is obtained in the subsequent machining process, reduces the machining deformation, and reduces the risk of scrapping of the parts due to large welding deformation.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a method for pre-controlling radial precision of an electron beam welding structure after blisk welding.
Background
The blade ring of the electron beam welding structure is an important component of the integral blade disc of the electron beam welding structure, and the blade ring and the single disc are welded to form the integral blade disc of the welding structure. The blisk is a core technology of a high-performance aircraft engine, the blisk with an electron beam welding structure is a new structure, and the processing technology of the blisk with the electron beam welding structure belongs to an advanced technology of the industry.
The welded structure is advantageous from the point of view of the development of blisks. Compared with an integral blank, the blade welded by the electron beam and the single disc can be machined by a small-allowance precision forging blank, raw materials are saved, the forging quality is guaranteed, the production efficiency is high, the cost is low, and the method is more economical than a solid blank machining method. Meanwhile, the manufacturing method of the single blade and the single disk in the blade disk structure is that the single blade and the single disk are manufactured respectively, the fiber direction of the single blade is not damaged by processing in the manufacturing process, the performance of the single blade is superior to that of a pure numerical control processing integral blade disk, the requirements on large-scale forging equipment and numerical control processing equipment are reduced, the production speed can be accelerated in batch production, and the production bottleneck is avoided. In order to realize the application of the blade ring of the electron beam welding structure and reduce the influence of welding deformation on the precision of parts, a method for improving the radial precision of the whole blade ring of the electron beam welding structure after welding is urgently needed.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a method for pre-controlling the radial precision of a welded integral blade ring of an electron beam welding structure, which reduces the influence of welding deformation on the precision of a part, ensures that uniform machining allowance is obtained in the subsequent machining process, reduces the machining deformation and reduces the risk of scrapping of the part due to large welding deformation.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a pre-control method for radial precision of a welded integral blade ring of an electron beam welding structure comprises the following steps:
s1, calculating a pre-compensation value before welding of the blade ring:
L＝△L×cosα×N；
in the formula, L is the total circumferential shrinkage of the blade ring; delta L is the shrinkage of each weld; alpha is the inclination angle of the welding seam relative to the upper end surface of the blade ring; n is the number of welding seams;
the pre-compensation value before welding of the blade ring is equal to the total circumferential shrinkage of the blade ring;
s2, calculating a pre-welding radius compensation value of the blade ring:
△R＝L÷(2π)；
in the formula, Delta R is the radial radius shrinkage of the blade ring;
the pre-radius compensation value before welding of the blade ring is equal to the radial radius shrinkage of the blade ring;
s3, calculating the pre-welding diameter of the blade ring:
D＝d+2×△R
in the formula, D is the diameter of the blade ring before welding; d is the diameter of the blade ring after welding;
s4, calculating the arc length of each single blade:
the circumferential length L1 before welding the blade ring is as follows: l1 ═ D × pi;
the arc length s of each single blade is as follows: s-L1 ÷ N1;
in the formula, N1 is the number of blades in the welding-structure blisk, and N1 is equal to N.
Further, the method for pre-controlling the radial precision of the whole blade ring of the electron beam welding structure after welding further comprises the following steps:
s5, manufacturing the single blade according to the calculated arc length of each single blade;
and S6, welding the single blades into blade rings.
The invention has the beneficial effects that:
1) the invention provides technical guarantee for the qualification of the manufacture of the integral blade ring of the electron beam welding structure, and can effectively control the radial dimension precision of the welded integral blade ring, so that the integral blade ring can obtain accurate radial reference and uniform machining allowance in the subsequent machining process, the machining deformation is reduced, and the risk of scrapping of parts due to large welding deformation is reduced;
2) the welded structure blisk processed by the method has the advantages of blank utilization rate, milling efficiency, internal organization, maintainability and the like, saves raw materials, ensures forging quality, has high production efficiency, low cost and performance superior to that of the blisk, and has wide application prospect.
3) The method for machining the blisk part with the welded structure is already put into practical use in factories, and the machined blisk with the electron beam welded structure can meet the design requirements.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
FIG. 1 is a flow chart of a method for pre-controlling radial precision of a welded blisk of an electron beam welded structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of an electron beam welding configuration blisk profile according to an embodiment of the present invention;
fig. 3 is a view from direction a of fig. 2 (schematic view of the weld position and angle).
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.
In order to solve the problems in the prior art, as shown in fig. 1 to 3, the invention provides a method for pre-controlling radial precision of an electron beam welding structure after blisk welding, which comprises the following steps:
s1, calculating a pre-compensation value before welding of the blade ring:
L＝△L×cosα×N；
in the formula, L is the total circumferential shrinkage of the blade ring; delta L is the shrinkage of each weld; alpha is the inclination angle of the welding seam relative to the upper end surface of the blade ring; n is the number of welding seams;
the pre-compensation value before welding of the blade ring is equal to the total circumferential shrinkage of the blade ring;
s2, calculating a pre-welding radius compensation value of the blade ring:
△R＝L÷(2π)；
in the formula, Delta R is the radial radius shrinkage of the blade ring;
the pre-radius compensation value before welding of the blade ring is equal to the radial radius shrinkage of the blade ring;
s3, calculating the pre-welding diameter of the blade ring:
D＝d+2×△R
in the formula, D is the diameter of the blade ring before welding; d is the diameter of the blade ring after welding;
s4, calculating the arc length of each single blade:
the circumferential length L1 before welding the blade ring is as follows: l1 ═ D × pi;
the arc length s of each single blade is as follows: s-L1 ÷ N1;
in the formula, N1 is the number of blades in the welding-structure blisk, and N1 is equal to N.
Further, the method for pre-controlling the radial precision of the whole blade ring of the electron beam welding structure after welding further comprises the following steps:
s5, manufacturing the single blade according to the calculated arc length of each single blade;
in the actual production process, the process flow for manufacturing the single blade is as follows:
determining a blade blank structure → designing a blade forging die → forging the blade blank → grouping the blade blank detection → casting low-melting-point alloy → milling a machining reference → removing the alloy → finely milling a tenon and a blade body → corroding → fluorescent → final inspection;
s6, welding the single blades into blade rings;
in the actual production process, the technological process for welding the monomer blade into the blade ring comprises the following steps:
assembly → detection → welding → detection → heat treatment → detection → reference repair → front and rear ends of the vehicle → final inspection.
After the electron beam welding structure blisk post-welding radial precision pre-control method is adopted, the blisk is welded with a blisk through the welding method, which comprises the following steps: assembling → welding → detecting → heat treatment → detecting → modifying the benchmark → fine milling the blade → fine turning the web profile → drilling → checking → polishing.
Examples
The embodiment provides a method for pre-controlling radial precision of an electron beam welded structure blisk after welding, the diameter of the blisk before welding is calculated according to the number of blades in the welding structure blisk in a design file, the inclination angle of a welding line, the shrinkage of each welding line and the diameter of the blisk after welding, the number of blades in the welding structure blisk is equal to the number of welding lines, the shrinkage of each welding line is an empirical value of the shrinkage of the welding line, the upper end face and the lower end face of the blisk are arranged in parallel, and each welding line is parallel.
In this embodiment, the number N1 of blades in the welded-structure blisk is 40, the number N of welds is 40, the angle α of inclination of the welds with respect to the upper end face of the blisk is 45 °, the shrinkage Δ L of each weld is 0.15mm, the diameter d of the blisk after welding is 1000mm, and the specific calculation steps are as follows:
s1, calculating a pre-compensation value before welding of the blade ring:
L＝△L×cosα×N＝0.15×cos45°×40＝4.24；
the pre-compensation value before welding the blade ring is 4.24 mm;
s2, calculating a pre-welding radius compensation value of the blade ring:
△R＝L÷(2π)＝4.24÷(2π)＝0.675；
the pre-compensation value of the radius of the blade ring before welding is 0.675 mm;
s3, calculating the pre-welding diameter of the blade ring:
D＝d+2×△R＝1000+2×0.675＝1001.35
the diameter D of the blade ring before welding is 1001.35 mm;
s4, calculating the arc length of each single blade:
the circumferential length L1 before welding the blade ring is as follows: l1 ═ D × pi ═ 1001.35 × pi ═ 3144.24 mm;
the arc length s of each single blade is as follows: s-L1 ÷ N1 ═ 3144.24 ÷ 40 ═ 78.61;
s5, manufacturing the single blade according to the calculated arc length of each single blade;
and S6, welding the single blades into blade rings.
As shown in fig. 2 and 3, the welding structure of the blisk is formed by connecting N1 blades by an electron beam welding method, the electron beam welding belongs to a fusion welding method, a certain welding shrinkage amount exists in the welding process, the shrinkage of the welding line is expressed on the circumference of the part, namely, the diameter of the part is shrunk, and meanwhile, the profile of the blade body of the blade can deviate along the radial direction, assuming that the welding shrinkage amount of each welding line is Δ L, the circumferential shrinkage amount generated by the shrinkage of the welding line during the welding of the blisk is L, and the radial shrinkage amount generated by the shrinkage of the welding line during the welding of the blisk is Δ R, in order to ensure that the size of the part after the shrinkage meets the process requirements, the position of the blade section needs to deviate from the Δ R distance in the direction of the blade tip when the profile of the blade body is processed, namely: to ensure a 2R weld fillet diameter, the 2X (R + Δ R) weld fillet diameter should be used. According to the invention, the welding deformation of the welding structure blade ring is scientifically predicted by carrying out welding deformation prediction and pre-compensation technology of the blade ring, and the radial dimension is pre-controlled, so that the radial dimension precision of the welded structure blade ring is effectively ensured to be closer to the preset dimension, the influence of welding deformation on the part precision is reduced, uniform machining allowance in the subsequent machining process is ensured, the machining deformation is reduced, and the risk of scrapping of the part due to large welding deformation is reduced. The method provided by the invention is used for processing the blisk with a welded structure, so that residual test piece blanks such as 4 single discs and 100 blades are saved, the development cost and period are reduced, and an important technical basis is laid for further development and application of the blisk technology.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (2)
1. A pre-control method for radial precision of a welded integral blade ring of an electron beam welding structure is characterized by comprising the following steps:
s1, calculating a pre-compensation value before welding of the blade ring:
L＝△L×cosα×N；
in the formula, L is the total circumferential shrinkage of the blade ring; delta L is the shrinkage of each weld; alpha is the inclination angle of the welding seam relative to the upper end surface of the blade ring; n is the number of welding seams;
the pre-compensation value before welding of the blade ring is equal to the total circumferential shrinkage of the blade ring;
s2, calculating a pre-welding radius compensation value of the blade ring:
△R＝L÷(2π)；
in the formula, Delta R is the radial radius shrinkage of the blade ring;
the pre-radius compensation value before welding of the blade ring is equal to the radial radius shrinkage of the blade ring;
s3, calculating the pre-welding diameter of the blade ring:
D＝d+2×△R
in the formula, D is the diameter of the blade ring before welding; d is the diameter of the blade ring after welding;
s4, calculating the arc length of each single blade:
the circumferential length L1 before welding the blade ring is as follows: l1 ═ D × pi;
the arc length s of each single blade is as follows: s-L1 ÷ N1;
in the formula, N1 is the number of blades in the welding-structure blisk, and N1 is equal to N.
2. The method for pre-controlling the radial precision of the electron beam welded structure blisk after welding as claimed in claim 1, further comprising the steps of:
s5, manufacturing the single blade according to the calculated arc length of each single blade;
and S6, welding the single blades into blade rings.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116197534A (en) * | 2023-05-06 | 2023-06-02 | 赫比(成都)精密塑胶制品有限公司 | Laser welding method and laser welding processing technology |
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- 2021-08-20 CN CN202110959023.5A patent/CN113579533A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| US20110266333A1 (en) * | 2008-08-27 | 2011-11-03 | Lukiyanets Sergey V | Fusion welding method for connecting thin-walled casings |
| CN102837160A (en) * | 2012-08-23 | 2012-12-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Assembling precision control method of single-body blades in blisk of electron beam welding structure |
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| CN110788562A (en) * | 2019-08-02 | 2020-02-14 | 中国航发北京航空材料研究院 | Manufacturing method of nickel-based alloy dual-performance blisk |
| CN111069744A (en) * | 2019-12-28 | 2020-04-28 | 天津航天长征火箭制造有限公司 | Method for controlling shape and position dimensions of 5-meter-diameter spherical box bottom through assembling and welding |
Non-Patent Citations (2)
| Title |
|---|
| 北京市工业***工人培训考核协调委员会: "《车工》", 31 July 1990, pages: 55 - 56 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116197534A (en) * | 2023-05-06 | 2023-06-02 | 赫比(成都)精密塑胶制品有限公司 | Laser welding method and laser welding processing technology |
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Application publication date: 20211102 |