CN114310180A - Manufacturing and assembling method of novel 35MPa axial extrusion pipeline connecting piece for aviation - Google Patents
Manufacturing and assembling method of novel 35MPa axial extrusion pipeline connecting piece for aviation Download PDFInfo
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- CN114310180A CN114310180A CN202111653665.9A CN202111653665A CN114310180A CN 114310180 A CN114310180 A CN 114310180A CN 202111653665 A CN202111653665 A CN 202111653665A CN 114310180 A CN114310180 A CN 114310180A
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- Prior art keywords
- pipe joint
- extrusion
- extrusion ring
- connecting piece
- pipeline connecting
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- 238000001125 extrusion Methods 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000000314 lubricant Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 7
- 238000002788 crimping Methods 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims abstract description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 6
- 229910000883 Ti6Al4V Inorganic materials 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 239000006104 solid solution Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 206010016256 fatigue Diseases 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention discloses a manufacturing and assembling method of a novel 35MPa axial extrusion pipeline connecting piece for aviation, wherein an extrusion ring and a pipe joint are manufactured by machining; the materials for manufacturing the extrusion ring and the pipe joint are all titanium alloy, the titanium alloy material is processed by a heat treatment process, and then is machined to manufacture the extrusion ring and the pipe joint with standard shapes, so that the manufactured extrusion ring and the pipe joint reach the required tensile strength; the inner surfaces of the extrusion ring, the outer surface of the pipe joint and the two ports of the pipe joint are coated with dry film lubricants, and the outer surface of the extrusion ring is provided with a mark part; when the axial extrusion pipeline connecting piece is assembled on an airplane, the extrusion ring and the pipe joint of the axial extrusion pipeline connecting piece are installed on a preset position of a guide pipe, the extrusion ring is extruded onto the pipe joint through the axial extrusion force of a special crimping tool, radial extrusion deformation connection of the pipe joint and the guide pipe is completed through the radial size difference of the extrusion ring and the pipe joint, and sealing of the pipe joint and the guide pipe is achieved.
Description
Technical Field
The invention belongs to the technical field of pipeline connecting pieces for aerospace, and particularly relates to a manufacturing and assembling method of a novel 35MPa axial extrusion pipeline connecting piece for aviation.
Background
In order to improve the flight performance of the international advanced aircraft, a hydraulic system is raised to 35MPa, the conduit connection of the hydraulic system is required to meet the requirements of the corresponding system pressure and performance indexes, and the 35MPa axial extrusion pipeline connecting piece is an international advanced conduit connecting piece, has the characteristics of high bearing pressure, simple structure, light weight, fatigue resistance, vibration resistance, good sealing performance, safety, reliability, simplicity in installation and operation and the like, and is widely applied to hydraulic systems of military and civil aircraft such as F-16, F-35B, C-17, V-22, A320, A380 and the like. The pressure of the hydraulic system of the airplane is increased to 35MPa, the weight of the hydraulic system of the airplane is greatly reduced, and the maneuvering performance and the tactical performance of the airplane are improved.
At present, all domestic aviation hydraulic systems adopt 74-degree flared pipeline connecting pieces, and the pipe joints of the pipeline connecting pieces have the defects of low system pressure, poor sealing performance and inconvenient installation, and also have the risk of fatigue fracture. While the domestic 35MPa axial extrusion pipeline connecting piece is in the research and development stage, a design, processing, manufacturing and assembling method of a technically perfect 35MPa axial extrusion pipeline connecting piece product does not exist.
Disclosure of Invention
Aiming at the problems, the invention makes up the defects of the prior art and provides a manufacturing and assembling method of a novel aviation 35MPa axial extrusion pipeline connecting piece with complete technology. The novel 35MPa axial extrusion pipeline connecting piece manufactured by the manufacturing and assembling method solves the problems of a 74-degree flaring pipeline connecting piece adopted by the current domestic aviation hydraulic system; the 35MPa axial extrusion pipeline connecting piece is guaranteed to meet the aviation technical requirements, and performance indexes such as sealing, connection strength, weight reduction, bending fatigue life and the like are met.
In order to achieve the purpose, the invention adopts the following technical scheme.
The invention relates to a manufacturing and assembling method of a 35MPa axial extrusion pipeline connecting piece for aviation, which comprises an extrusion ring and a pipe joint, wherein the extrusion ring and the pipe joint are manufactured by machining;
the material for manufacturing the extrusion ring and the pipe joint is titanium alloy, firstly, the titanium alloy material is processed by a heat treatment process and then is machined to manufacture the extrusion ring and the pipe joint with standard shapes, so that the manufactured extrusion ring and the manufactured pipe joint reach the required tensile strength;
dry film lubricants are coated on the inner surface of the extrusion ring, the outer surface of the pipe joint and the inner surfaces of two ports of the pipe joint, and identification parts are arranged on the outer surface of the extrusion ring;
when the axial extrusion pipeline connecting piece is assembled on an airplane, the extrusion ring and the pipe joint of the axial extrusion pipeline connecting piece are installed on a preset position of a guide pipe, the extrusion ring is extruded onto the pipe joint through the axial extrusion force of a special crimping tool, radial extrusion deformation connection of the pipe joint and the guide pipe is completed through the radial size difference of the extrusion ring and the pipe joint, and sealing of the pipe joint and the guide pipe is achieved.
As a preferable scheme of the invention, the materials for manufacturing the extrusion ring and the pipe joint are titanium alloy with the model of Ti-6Al-4V, and the titanium alloy material for manufacturing the extrusion ring is treated by a solid solution and aging heat treatment process.
In another preferred embodiment of the present invention, the extrusion ring is formed to have a required tensile strength of 1100MPa by a heat treatment process, and the pipe joint is formed to have a required tensile strength of 900MPa by a heat treatment process.
In another preferred embodiment of the present invention, the dry lubricant coated on the inner surface of the extrusion ring, the outer surface of the pipe joint, and the inner surfaces at the two ports of the pipe joint is molybdenum disulfide.
In another preferred embodiment of the present invention, the coating process of the dry film lubricant molybdenum disulfide on the inner surface of the extrusion ring, the outer surface of the pipe joint, and the inner surfaces at the two ports of the pipe joint includes sand blowing, spraying, and drying.
In another preferred embodiment of the present invention, the marking portion on the outer surface of the extrusion ring is coated with blue polytetrafluoroethylene.
The invention has the beneficial effects that:
1. the novel 35MPa axial extrusion pipeline connecting piece manufactured by the manufacturing and assembling method solves the problems of a 74-degree flaring pipeline connecting piece adopted by the current domestic aviation hydraulic system; the 35MPa axial extrusion pipeline connecting piece is guaranteed to meet the aviation technical requirements, and performance indexes such as sealing, connection strength, weight reduction, bending fatigue life and the like are met.
2. The manufacturing and assembling method can complete material selection, dry film lubrication, marking and final assembly of the pipe joint and the extrusion ring of the axial extrusion pipeline connecting piece.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to specific embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The invention relates to a manufacturing and assembling method of a 35MPa axial extrusion pipeline connecting piece for aviation, which comprises an extrusion ring and a pipe joint, wherein the extrusion ring and the pipe joint are manufactured by machining; the material for manufacturing the extrusion ring and the pipe joint is titanium alloy, firstly, the titanium alloy material is processed by a heat treatment process and then is machined to manufacture the extrusion ring and the pipe joint with standard shapes, so that the manufactured extrusion ring and the manufactured pipe joint reach the required tensile strength; dry film lubricants are coated on the inner surface of the extrusion ring, the outer surface of the pipe joint and the inner surfaces of two ports of the pipe joint, and identification parts are arranged on the outer surface of the extrusion ring; when the axial extrusion pipeline connecting piece is assembled on an airplane, the extrusion ring and the pipe joint of the axial extrusion pipeline connecting piece are installed on a preset position of a guide pipe, the extrusion ring is extruded onto the pipe joint through the axial extrusion force of a special crimping tool, radial extrusion deformation connection of the pipe joint and the guide pipe is completed through the radial size difference of the extrusion ring and the pipe joint, and sealing of the pipe joint and the guide pipe is achieved.
The materials for manufacturing the extrusion ring and the pipe joint are titanium alloy with the model of Ti-6Al-4V, and the titanium alloy material for manufacturing the extrusion ring is treated by a solid solution and aging heat treatment process.
The selection of the materials of the extrusion ring and the pipe joint is a key step for ensuring that the axial extrusion pipeline connecting piece meets the requirement of aviation technology, and is a necessary condition for meeting performance indexes such as sealing, connecting strength, weight reduction, bending fatigue life and the like, and the selection of the materials of the extrusion ring and the pipe joint and tensile mechanical performance indexes of the manufactured extrusion ring and the pipe joint are shown in the following table 1.
TABLE 1
| Name of part | Material brand | State of material | Thermal treatment | Tensile strength |
| Pipe joint | Ti-6Al-4V | M | —— | 900MPa |
| Extrusion ring | Ti-6Al-4V | M | Solid solution and aging | 1100MPa |
The manufactured extrusion ring achieves the required 1100MPa tensile strength through a heat treatment process, and the manufactured pipe joint achieves the required 900MPa tensile strength through the heat treatment process.
And the dry film lubricants coated on the inner surface of the extrusion ring, the outer surface of the pipe joint and the inner surfaces of the two ports of the pipe joint are all molybdenum disulfide.
The coating process of the dry film lubricant molybdenum disulfide on the inner surface of the extrusion ring, the outer surface of the pipe joint and the inner surfaces at two ports of the pipe joint comprises sand blowing, spraying and drying.
The inner surface of the extrusion ring, the outer surface of the pipe joint and the inner surfaces at two ports of the pipe joint are coated with dry film lubricants, so that the extrusion ring does not generate surface scratches when moving axially on the pipe joint in the process of assembling the axial extrusion pipeline connecting piece; the selection of the lubricating materials applied to the inner surface of the extrusion ring, the outer surface of the pipe joint, and the inner surface at both ends of the pipe joint is shown in table 2 below.
TABLE 2
The identification part of the outer surface of the extrusion ring is coated with blue polytetrafluoroethylene, specifically, in order to ensure the uniqueness and convenient identification of the product of the axial extrusion pipeline connecting piece, the surface of the extrusion ring is coated with identification colors, and according to the particularity of the axial extrusion pipeline connecting piece, the outer surface of the extrusion ring is coated with blue polytetrafluoroethylene.
The invention aims to complete the material selection, dry film lubrication, marking and final assembly of the pipe joint and the extrusion ring by providing a manufacturing and assembling method.
By using the manufacturing and assembling method, 35MPa axial extrusion pipeline connecting pieces suitable for various specifications can be designed and manufactured, and the connecting strength and the sealing performance of the connecting pieces can meet the requirements; specifically, the 35MPa axial extrusion pipeline connecting piece manufactured by using the manufacturing and assembling method has the following advantages:
(1) the high-pressure hydraulic system is suitable for pipeline connection of a 35MPa high-pressure aviation hydraulic system, the pressure of the hydraulic system is improved, and the volumes of a system execution mechanism and an oil storage tank are reduced.
(2) The sealing performance is good, the leakage of hydraulic oil is avoided, and the safety and the reliability are realized.
(3) The connecting strength is high, and the connecting structure is suitable for various stressed occasions.
(4) The installation is convenient, the operation is simple, the device is suitable for various occasions or field operation, and the rapid maintenance in wartime is met.
(5) The guide pipe matched with the axial extrusion pipeline connecting piece does not need flaring, and a titanium alloy guide pipe can be adopted, so that the weight of the hydraulic system pipeline is reduced, the fuel consumption of the airplane in flying is reduced, and the tactical performance of the airplane is improved.
(6) The implementation of the invention can ensure the technical key of the axial extrusion of the pipeline connecting piece, improve the application level of the pipeline connecting piece of the aviation hydraulic system in China, improve the technical level of the hydraulic systems of the domestic fighter and the civil aircraft, lead the pipeline connecting technology of the hydraulic systems of the domestic aircraft to catch up with the international advanced level, and simultaneously improve the safety and the reliability of the hydraulic systems of the domestic aircraft. In the aspect of economy, the pipeline connection technology of the aviation hydraulic system can be improved to 35MPa, so that the pressure of the hydraulic system of the airplane is improved, the weight of the hydraulic system of the airplane is reduced, the flight performance of the airplane is improved, the fuel consumption of the airplane is reduced, and the social benefit is obviously improved.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (6)
1. The manufacturing and assembling method of the aviation 35MPa axial extrusion pipeline connecting piece is characterized by comprising the following steps of: the device comprises an extrusion ring and a pipe joint, wherein the extrusion ring and the pipe joint are manufactured by machining;
the material for manufacturing the extrusion ring and the pipe joint is titanium alloy, firstly, the titanium alloy material is processed by a heat treatment process and then is machined to manufacture the extrusion ring and the pipe joint with standard shapes, so that the manufactured extrusion ring and the manufactured pipe joint reach the required tensile strength;
dry film lubricants are coated on the inner surface of the extrusion ring, the outer surface of the pipe joint and the inner surfaces of two ports of the pipe joint, and identification parts are arranged on the outer surface of the extrusion ring;
when the axial extrusion pipeline connecting piece is assembled on an airplane, the extrusion ring and the pipe joint of the axial extrusion pipeline connecting piece are installed on a preset position of a guide pipe, the extrusion ring is extruded onto the pipe joint through the axial extrusion force of a special crimping tool, radial extrusion deformation connection of the pipe joint and the guide pipe is completed through the radial size difference of the extrusion ring and the pipe joint, and sealing of the pipe joint and the guide pipe is achieved.
2. The manufacturing and assembling method of the aviation 35MPa axial extrusion pipeline connecting piece is characterized in that: the materials for manufacturing the extrusion ring and the pipe joint are titanium alloy with the model of Ti-6Al-4V, and the titanium alloy material for manufacturing the extrusion ring is treated by a solid solution and aging heat treatment process.
3. The manufacturing and assembling method of the aviation 35MPa axial extrusion pipeline connecting piece is characterized in that: the manufactured extrusion ring achieves the required 1100MPa tensile strength through a heat treatment process, and the manufactured pipe joint achieves the required 900MPa tensile strength through the heat treatment process.
4. The manufacturing and assembling method of the aviation 35MPa axial extrusion pipeline connecting piece is characterized in that: and the dry film lubricants coated on the inner surface of the extrusion ring, the outer surface of the pipe joint and the inner surfaces of the two ports of the pipe joint are all molybdenum disulfide.
5. The manufacturing and assembling method of the aviation 35MPa axial extrusion pipeline connecting piece is characterized in that: the coating process of the dry film lubricant molybdenum disulfide on the inner surface of the extrusion ring, the outer surface of the pipe joint and the inner surfaces at two ports of the pipe joint comprises sand blowing, spraying and drying.
6. The manufacturing and assembling method of the aviation 35MPa axial extrusion pipeline connecting piece is characterized in that: the marking part of the outer surface of the extrusion ring is coated blue polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111653665.9A CN114310180B (en) | 2021-12-30 | 2021-12-30 | Manufacturing and assembling method of novel 35MPa axial extrusion pipeline connecting piece for aviation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111653665.9A CN114310180B (en) | 2021-12-30 | 2021-12-30 | Manufacturing and assembling method of novel 35MPa axial extrusion pipeline connecting piece for aviation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114310180A true CN114310180A (en) | 2022-04-12 |
| CN114310180B CN114310180B (en) | 2024-01-05 |
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| CN202111653665.9A Active CN114310180B (en) | 2021-12-30 | 2021-12-30 | Manufacturing and assembling method of novel 35MPa axial extrusion pipeline connecting piece for aviation |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1975548U (en) * | 1967-09-23 | 1967-12-21 | Karl Walter Bell | CRIMP RING AS SEAL FOR PIPE CONNECTIONS. |
| DE1957565A1 (en) * | 1969-11-15 | 1971-05-19 | Tracto Technik | Device for connecting a cutting ring pipe union to a hydraulic pipe |
| FR2450671A1 (en) * | 1979-03-09 | 1980-10-03 | Seperef | Hand press for making sealed joint in pipes - has two chained rocking jaws connected by pinned tie to hand levers |
| US4696085A (en) * | 1982-02-04 | 1987-09-29 | Firma Compat Aktiengesellschaft | Apparatus for pressing tubular parts |
| KR20070097176A (en) * | 2006-03-28 | 2007-10-04 | 아시아 바이탈 컴포넌츠 컴퍼니 리미티드 | Method for producing slab heat pipe and method for joining its case |
| ITRA20100030A1 (en) * | 2010-10-22 | 2011-01-21 | Ipm S R L | GASKET INSERTION SYSTEM IN THE GLASS JOINT OF A PLASTIC AND CONTEMPORARY TUBE CHECKING ITS POSITIONING |
| CN103627927A (en) * | 2012-08-24 | 2014-03-12 | 东港市东方高新金属材料有限公司 | Titanium alloy extruded pipe or rolled pipe and preparation method thereof |
| CN104611657A (en) * | 2015-01-08 | 2015-05-13 | 太原理工大学 | Machining method for titanium alloy bushing joint |
| CN112066103A (en) * | 2020-10-10 | 2020-12-11 | 大连长之琳科技发展有限公司 | Axial extrusion type connecting pipe joint assembly and pipe joint formed by same |
-
2021
- 2021-12-30 CN CN202111653665.9A patent/CN114310180B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1975548U (en) * | 1967-09-23 | 1967-12-21 | Karl Walter Bell | CRIMP RING AS SEAL FOR PIPE CONNECTIONS. |
| DE1957565A1 (en) * | 1969-11-15 | 1971-05-19 | Tracto Technik | Device for connecting a cutting ring pipe union to a hydraulic pipe |
| FR2450671A1 (en) * | 1979-03-09 | 1980-10-03 | Seperef | Hand press for making sealed joint in pipes - has two chained rocking jaws connected by pinned tie to hand levers |
| US4696085A (en) * | 1982-02-04 | 1987-09-29 | Firma Compat Aktiengesellschaft | Apparatus for pressing tubular parts |
| KR20070097176A (en) * | 2006-03-28 | 2007-10-04 | 아시아 바이탈 컴포넌츠 컴퍼니 리미티드 | Method for producing slab heat pipe and method for joining its case |
| ITRA20100030A1 (en) * | 2010-10-22 | 2011-01-21 | Ipm S R L | GASKET INSERTION SYSTEM IN THE GLASS JOINT OF A PLASTIC AND CONTEMPORARY TUBE CHECKING ITS POSITIONING |
| CN103627927A (en) * | 2012-08-24 | 2014-03-12 | 东港市东方高新金属材料有限公司 | Titanium alloy extruded pipe or rolled pipe and preparation method thereof |
| CN104611657A (en) * | 2015-01-08 | 2015-05-13 | 太原理工大学 | Machining method for titanium alloy bushing joint |
| CN112066103A (en) * | 2020-10-10 | 2020-12-11 | 大连长之琳科技发展有限公司 | Axial extrusion type connecting pipe joint assembly and pipe joint formed by same |
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| Publication number | Publication date |
|---|---|
| CN114310180B (en) | 2024-01-05 |
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