CN114043109A - Composite connection method of large-size round-square 3D printer case - Google Patents
Composite connection method of large-size round-square 3D printer case Download PDFInfo
- Publication number
- CN114043109A CN114043109A CN202111535227.2A CN202111535227A CN114043109A CN 114043109 A CN114043109 A CN 114043109A CN 202111535227 A CN202111535227 A CN 202111535227A CN 114043109 A CN114043109 A CN 114043109A
- Authority
- CN
- China
- Prior art keywords
- welding
- printer case
- electron beam
- printer
- square
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a composite connection method of a large-size round-square 3D printer case, which comprises the following steps of 1, adopting a welding mode of mainly electron beam welding and secondarily laser cladding according to a connection section structure of the 3D printer case; step 2, removing external reinforcing ribs at the longitudinal electron beam welding seam part in each 3D printer casing connecting section; step 3, welding longitudinal welding seams on the connecting sections of the 3D printer casings by adopting electron beam welding; step 4, repairing the external reinforcing ribs removed in the step 2 by laser cladding; and 5, compositely connecting the fifth connecting section of the 3D printer case to complete the composite connection of the 3D printer case. By adopting a composite connection process which takes electron beams as a main part and laser cladding as an auxiliary part, the welding deformation is reduced to the greatest extent. The main longitudinal welding line is welded by adopting an electron beam, the parts which cannot be welded by the other electron beams are welded by adopting laser cladding, and the electron beam welding process does not need to process a groove, so that the welding efficiency can be effectively improved.
Description
Technical Field
The invention belongs to the field of manufacturing of non-rotary casings of aero-engines, and particularly belongs to a composite connection method of a large-size circular-square 3D printer casing.
Background
The round square rotating casing is a main bearing and pressure-bearing part of a nozzle of a certain type of aircraft engine, the overall dimension of the round square rotating casing is relatively large (1140mm), and the round square rotating casing is made of GH 4169. The air inlet is round, the air outlet is rectangular, and the air inlet is a thin-wall non-rotary special-shaped curved casing. The exhaust port has a large downward eccentricity relative to the intake port, and forms a curved surface shape of the inner flow passage with a large change in curvature. In order to ensure that the casing has enough strength and rigidity, a plurality of criss-cross and non-uniform-depth'm' -shaped reinforcing ribs are additionally arranged on the outer molded surface of the shell, so that the shell structure becomes extremely complex, and belongs to the category of large-size non-rotary casings.
In the case blank manufacturing aspect, alternative processes are casting, forging, and 3D printing. If a casting process is adopted, the problems are as follows: the control difficulty of the casting metallurgical defects is high, a large number of loose, air holes, unfused and even visible holes cause that a large number of base body parts need repair welding, the repair welding and repairing difficulty of the castings is high, and the blank deformation caused by the repair welding of a large number of parts is serious; if a forging piece process is adopted, the integral forging difficulty is too large, and a machining process combining sector forging and welding is adopted, the problems are that: because the outer profile is too complex, criss-cross'm' -shaped reinforcing ribs are distributed besides the connecting boss, the curvature change of the inner runner is large, the inner and outer profiles of the casing are required to be processed, the processing allowance is large, the period is long, and the requirement of the model development period cannot be met; if a powder spreading 3D printing process is adopted, the whole printing process is the simplest, but no equipment capable of realizing whole printing exists at present because the size of a part is too large.
Based on the structural analysis of parts and considering factors such as the development cycle of projects and equipment, a blank preparation method for laying powder and printing a fan-shaped section casing in a 3D mode and combining welding forming is formulated, reinforcing ribs and a mounting seat of an outer profile of the casing are directly formed, the process method only needs to process the mounting surfaces of the inner runner profile and the mounting seat, the complex outer profile does not need to be processed, and the processing efficiency can be greatly improved.
The connection of the GH4169 material 3D printing sector section round-square casing belongs to a new structure and a new process, and no mature method for reference exists, so that a feasible, efficient and economic connection method needs to be researched.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a composite connection method of a large-size round-to-square 3D printer case, which is used for solving the problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a composite connection method of a large-size round-square 3D printer case comprises the following steps,
step 1, adopting a welding mode with electron beam welding as a main mode and laser cladding as an auxiliary mode according to a connecting section structure of a 3D printer casing;
step 2, removing external reinforcing ribs at the longitudinal electron beam welding seam part in each 3D printer casing connecting section;
step 3, welding longitudinal welding seams on the connecting sections of the 3D printer casings by adopting electron beam welding;
step 4, repairing the external reinforcing ribs removed in the step 2 by laser cladding;
and 5, compositely connecting the fifth connecting section of the 3D printer case to complete the composite connection of the 3D printer case.
Preferably, in the step 1, the thickness range of the connecting section structure in the 3D printer case is 2-10 mm.
Preferably, the longitudinal welding seam in the connecting section of the 3D printer case in the step 1 is welded by electron beams, and the parts which cannot be welded by the other electron beams are welded by laser cladding.
Preferably, in the step 2, the external reinforcing ribs at the longitudinal electron beam welding seam part are removed by milling, so that the thicknesses of the electron beam welding parts are equal.
Further, in the step 3, four longitudinal welding seams are welded on the welding positions of the connecting sections of the 3D printer case with the same thickness by adopting electron beam welding.
Preferably, in step 4, the fifth connecting section of the 3D printer case is of a non-fan-shaped section structure, the welding seams include a long welding seam and three short welding seams, the long welding seam adopts electron beam welding, and the three short welding seams adopt laser cladding.
Preferably, all welding seam parts of the 3D printer casing which is subjected to composite connection are subjected to X-ray detection.
Preferably, all weld positions of the 3D printer casing which is subjected to composite connection are subjected to fluorescence detection.
Preferably, the connecting section of the 3D printer casing is formed by powder spreading 3D printing.
Preferably, the material of the 3D printer case is nickel-based superalloy GH 4169.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a composite connection method of a large-size round-square 3D printer case, which reduces welding deformation to the maximum extent by adopting a composite connection process taking electron beams as a main part and laser cladding as an auxiliary part. The main longitudinal welding line is welded by adopting an electron beam, the parts which cannot be welded by the other electron beams are welded by adopting laser cladding, and the electron beam welding process does not need to process a groove, so that the welding efficiency can be effectively improved. The process method can effectively solve the connection problem of the large-size 3D printer case, and provides a brand-new idea for the process method of other parts with complex connection parts.
Furthermore, the external reinforcing ribs at the welding seam part of the longitudinal electron beam are removed by milling, so that the thicknesses of the welding parts of the electron beam are equal, and the problem that the electron beam welding cannot realize the welding of parts with variable wall thicknesses at one time is avoided.
Furthermore, X-ray detection is carried out on all welding seam parts, the internal quality of the welding seam is detected, and the influence on the welding quality caused by cracks and the like is avoided.
Furthermore, all welding seam parts are subjected to fluorescence detection, and the surfaces of the welding seams are detected, so that the welding quality is prevented from being influenced.
Drawings
FIG. 1 is a schematic view of a round-to-square casing structure;
FIG. 2 is a schematic view of electron beam welding with reinforcing ribs removed;
FIG. 3 is a top view of an electron beam weld profile;
FIG. 4 is a schematic view of filling a reinforcing rib by laser cladding;
fig. 5 is a fifth stage weld pattern.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
A composite connection method for a large-size round-to-square 3D printer case takes a round-to-square printer case of a certain type of engine as an example, and comprises the following steps:
(1) connection scheme formulation
In the aspect of selection of welding modes, the electron beam welding has the characteristics of small deformation, high efficiency and good welding quality, and is suitable for the thickness of parts of 2-10 mm. The laser cladding is suitable for the welding seam connection of the special-shaped structure and has the characteristic of small heat input. According to the characteristics that a certain round square casing is large in welding thickness (5mm) and complex in structure, a composite connection scheme combining electron beam welding and laser cladding is adopted.
Considering that the powder spreading 3D printing fan-shaped section casing has generated a certain degree of deformation, the welding process can continue to be overlapped and deformed, and therefore the deformation factor needs to be fully considered in the selection of the welding method. Compared with the two welding methods, the deformation generated by the electron beam welding is smaller in the aspect of welding deformation, and the electron beam welding is superior to laser cladding. In the aspect of welding efficiency, beveling is needed in laser cladding, the efficiency of the cladding process is low, and electron beam welding is superior to laser cladding welding. Therefore, the main longitudinal welding line of the fan-shaped section casing is welded by electron beams, and the parts which are inaccessible to the electron beam welding are welded by laser cladding. Namely a welding scheme taking electron beam welding as main laser cladding as auxiliary.
(2) External reinforcing rib for removing longitudinal electron beam welding seam part
Because the outer molded surface of the circular rotating square machine box shell is fully distributed with a plurality of reinforcing ribs which are criss-cross and have different depths, the electron beam welding can not realize the welding of parts with variable wall thickness (the wall thickness difference is too large) at one time, and therefore, before the electron beam welding, the reinforcing ribs at the welding seam part are milled and removed, so that the thickness of the welding part of the electron beam is basically consistent, as shown in figure 2.
(3) Electron beam welding of longitudinal welds
And welding four longitudinal welding seams of the round-square casing by adopting electron beams. See in particular fig. 3.
(4) Laser cladding repair reinforcing rib
And repairing the reinforcing ribs removed before electron beam welding on the outer surface of the casing again by using a laser cladding process. See in particular fig. 4.
(5) Fifth section of composite connection round-to-square casing
The fifth section of the turbine circular-square casing is of a non-fan-shaped section structure, the welding seams comprise a long welding seam and three short welding seams which are respectively connected with the casing base body, the bottom plate of the fifth section and the three supporting columns, and the welding method adopts a scheme of combining electron beam welding and laser cladding welding.
The thickness of the three pillars reaches 50mm, electron beams are difficult to penetrate through, the structural arrangement is dispersed, and the electron beam welding process cannot be realized, so the laser cladding is adopted as the connecting method. And the long welding line of the fifth section of the bottom plate adopts an electron beam welding process. See in particular fig. 5.
(6) And (4) detecting X-rays.
X-ray detection is carried out on all welding seam parts, the internal quality of the welding seam is detected, and the influence on the welding quality caused by cracks and the like is avoided.
(7) And (4) detecting fluorescence.
And performing fluorescence detection on all welding seam parts, and detecting the surfaces of the welding seams to avoid influencing the welding quality.
Examples
The material of a round-to-square case of a certain aeroengine is GH4169, a blank is a powder-spreading 3D printing sector section, and the outline size of the case is relatively large (1140 mm). The specific process flow is as follows: removing external reinforcing ribs at the longitudinal electron beam welding seam part, welding the longitudinal electron beam welding seam, repairing the reinforcing ribs by laser cladding, compositely connecting the fifth section of the circular rotating square casing, detecting by X-ray and detecting by fluorescence.
Claims (10)
1. A composite connection method of a large-size round-square 3D printer case is characterized by comprising the following steps,
step 1, adopting a welding mode with electron beam welding as a main mode and laser cladding as an auxiliary mode according to a connecting section structure of a 3D printer casing;
step 2, removing external reinforcing ribs at the longitudinal electron beam welding seam part in each 3D printer casing connecting section;
step 3, welding longitudinal welding seams on the connecting sections of the 3D printer casings by adopting electron beam welding;
step 4, repairing the external reinforcing ribs removed in the step 2 by laser cladding;
and 5, compositely connecting the fifth connecting section of the 3D printer case to complete the composite connection of the 3D printer case.
2. The composite connection method of a large-size round-square 3D printer case as claimed in claim 1, wherein in step 1, the thickness of the connection section structure in the 3D printer case is in a range of 2-10 mm.
3. The composite connection method of the large-size round-square 3D printer case as claimed in claim 1, wherein the longitudinal weld seam in the connection section of the 3D printer case in step 1 is selected to be welded by electron beams, and the other parts which are inaccessible to electron beam welding are welded by laser cladding.
4. The composite connection method of a large-size round-turning-square 3D printer case as claimed in claim 1, wherein in step 2, milling is used to remove external ribs at the longitudinal electron beam welding seam portion, so that the thickness of the electron beam welding portion is equal.
5. The composite connection method of a large-size round-turning-square 3D printer case as claimed in claim 4, wherein in step 3, four longitudinal welds are welded to the welding positions of the connection sections of the 3D printer case with the same thickness by using electron beam welding.
6. The composite connection method of the large-size round-turn-square 3D printer case as claimed in claim 1, wherein in the step 4, the fifth connection section of the 3D printer case is in a non-fan-shaped section structure, the welding seam comprises a long welding seam and three short welding seams, the long welding seam adopts electron beam welding, and the three short welding seams adopt laser cladding.
7. The composite connection method of a large-sized circular-to-square 3D printer case as claimed in claim 1, wherein X-ray detection is performed on all welded portions of the 3D printer case where the composite connection is completed.
8. The composite connection method of a large-size round-square 3D printer case as claimed in claim 1, wherein all weld positions of the 3D printer case subjected to composite connection are subjected to fluorescence detection.
9. The composite connection method of the large-size round-to-square 3D printer case as claimed in claim 1, wherein the connection section of the 3D printer case is formed by powder laying 3D printing.
10. The composite connection method of the large-size round-to-square 3D printer case as claimed in claim 1, wherein the material of the 3D printer case is nickel-based superalloy GH 4169.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111535227.2A CN114043109A (en) | 2021-12-15 | 2021-12-15 | Composite connection method of large-size round-square 3D printer case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111535227.2A CN114043109A (en) | 2021-12-15 | 2021-12-15 | Composite connection method of large-size round-square 3D printer case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114043109A true CN114043109A (en) | 2022-02-15 |
Family
ID=80212995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111535227.2A Pending CN114043109A (en) | 2021-12-15 | 2021-12-15 | Composite connection method of large-size round-square 3D printer case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114043109A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115121811A (en) * | 2022-06-29 | 2022-09-30 | 中国航发动力股份有限公司 | Welding method of powder-spreading 3D printer case and engine case |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498203A (en) * | 2017-08-10 | 2017-12-22 | 北京煜鼎增材制造研究院有限公司 | A kind of electron beam welding and laser gain material manufacture composite connecting method |
| US20180079003A1 (en) * | 2015-03-10 | 2018-03-22 | Tsinghua University | Additive manufacturing device utilizing eb-laser composite scan |
| CN107971693A (en) * | 2017-11-23 | 2018-05-01 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of wheel chamber casing crackle repair method of titanium alloy inlet casing |
| CN208380978U (en) * | 2018-04-11 | 2019-01-15 | 重庆天骄航空动力有限公司 | A kind of low-pressure compressor casing assembling unit structure |
| CN110977170A (en) * | 2019-11-25 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Electron beam welding method for thin-wall casing gas-collecting hood structure |
| CN113182690A (en) * | 2021-05-21 | 2021-07-30 | 南京工业职业技术大学 | High-energy beam composite welding method for stainless steel cooling plate |
| CN113369728A (en) * | 2021-05-20 | 2021-09-10 | 北京航空航天大学 | Method for manufacturing titanium alloy large-scale complex structure component |
-
2021
- 2021-12-15 CN CN202111535227.2A patent/CN114043109A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180079003A1 (en) * | 2015-03-10 | 2018-03-22 | Tsinghua University | Additive manufacturing device utilizing eb-laser composite scan |
| CN107498203A (en) * | 2017-08-10 | 2017-12-22 | 北京煜鼎增材制造研究院有限公司 | A kind of electron beam welding and laser gain material manufacture composite connecting method |
| CN107971693A (en) * | 2017-11-23 | 2018-05-01 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of wheel chamber casing crackle repair method of titanium alloy inlet casing |
| CN208380978U (en) * | 2018-04-11 | 2019-01-15 | 重庆天骄航空动力有限公司 | A kind of low-pressure compressor casing assembling unit structure |
| CN110977170A (en) * | 2019-11-25 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Electron beam welding method for thin-wall casing gas-collecting hood structure |
| CN113369728A (en) * | 2021-05-20 | 2021-09-10 | 北京航空航天大学 | Method for manufacturing titanium alloy large-scale complex structure component |
| CN113182690A (en) * | 2021-05-21 | 2021-07-30 | 南京工业职业技术大学 | High-energy beam composite welding method for stainless steel cooling plate |
Non-Patent Citations (1)
| Title |
|---|
| 李祚军 等: "Ti2AlNb合金电子束焊接在航空发动机机匣中的应用", 燃气涡轮试验与研究, vol. 33, no. 3, pages 52 - 56 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115121811A (en) * | 2022-06-29 | 2022-09-30 | 中国航发动力股份有限公司 | Welding method of powder-spreading 3D printer case and engine case |
| CN115121811B (en) * | 2022-06-29 | 2024-03-12 | 中国航发动力股份有限公司 | Welding method of powder-spreading 3D printer casing and engine casing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112496341B (en) | Laser selective melting forming and post-processing method for thin-wall interlayer cooling structure | |
| EP2777867B1 (en) | Methods for the repair of gas turbine engine components using additive manufacturing techniques | |
| US8049132B2 (en) | Method of repairing a blisk and test pieces by welding | |
| US9289826B2 (en) | Turbine stator airfoil assemblies and methods for their manufacture | |
| US20230141321A1 (en) | Methods for preparing prefabricated crack defect and built-in crack defect, and prefabricated member | |
| CN104625650A (en) | Manufacturing technology for runner of impulse turbine | |
| US10519777B2 (en) | Tip member for blade structure and related method to form turbomachine component | |
| CN106077901A (en) | Electric arc based on hot-work die failure site increases material manufacture method | |
| CN105290632A (en) | Method for repairing high-temperature alloy thin-walled cartridge receiver part through precision pulse welding | |
| CN114043109A (en) | Composite connection method of large-size round-square 3D printer case | |
| EP2774716A2 (en) | Method of producing a hollow airfoil | |
| CN104822489A (en) | Method and device for manufacturing turbine blades | |
| CN107999950A (en) | A kind of middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing | |
| CN105149827A (en) | Welded type electric passenger car motor base and welding method thereof | |
| CN112077309B (en) | Repairing method and repairing tool for tip of titanium alloy compressor rotor blade | |
| CN109483072A (en) | The welding method and tooling of shield machine screw machine stand | |
| EP3417989A1 (en) | Composite turbomachine component and corresponding method of providing such a component | |
| CN112935276A (en) | Electric arc additive manufacturing method of thick-wall large-diameter three-way pipe fitting for oil and gas transmission | |
| US20150078904A1 (en) | Repaired turbine rotor wheel dovetail and related method | |
| CN110895634B (en) | Integrated simulation method of welding structure of 2.5 mm-thick aluminum lithium alloy T-shaped joint for accurate deformation control | |
| CN116060641A (en) | Nickel-based superalloy selective laser melting forming simulation and structure optimization method | |
| CN114131925A (en) | Spatial position forming method and device based on additive manufacturing | |
| EP0431019B1 (en) | Dual-alloy disk system | |
| CN114309645A (en) | Method for repairing turbine blade of gas turbine | |
| CN113579533A (en) | Pre-control method for radial precision of electron beam welding structure after blisk welding |
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 |