CN112061405A - High-bearing-capacity dot matrix lightweight connecting rod structure and application thereof - Google Patents
High-bearing-capacity dot matrix lightweight connecting rod structure and application thereof Download PDFInfo
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- CN112061405A CN112061405A CN202011049369.3A CN202011049369A CN112061405A CN 112061405 A CN112061405 A CN 112061405A CN 202011049369 A CN202011049369 A CN 202011049369A CN 112061405 A CN112061405 A CN 112061405A
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
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- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
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- 238000000034 method Methods 0.000 claims description 4
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- 238000004458 analytical method Methods 0.000 claims description 2
- 238000007639 printing Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
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- 230000001502 supplementing effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 238000005457 optimization Methods 0.000 abstract description 7
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- 229910000831 Steel Inorganic materials 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
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- 239000013585 weight reducing agent Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/40—Arrangements for mounting power plants in aircraft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/40—Arrangements for mounting power plants in aircraft
- B64D27/404—Suspension arrangements specially adapted for supporting vertical loads
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- 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
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention relates to a high-bearing-capacity dot matrix lightweight connecting rod structure, and belongs to the technical field of airplane structural design. This height bears dot matrix lightweight connecting rod structure includes: the annular rod section comprises an inner skin, an outer skin and an annular middle structure positioned between the inner skin and the outer skin; the first connecting end and the second connecting end are positioned at two ends of the annular rod section and are used for connecting the load transmission joint, wherein the annular middle structure is an annular space lattice network structure adopting an octahedral lattice cell. The high-bearing-capacity lattice lightweight connecting rod structure provided by the technical scheme of the invention can ensure the performance of each aspect of the connecting rod structure and realize the lightweight of the connecting rod structure. In addition, the high-bearing-capacity lattice lightweight connecting rod structure is in an integrated optimization design, and the weight is reduced through the lattice grating structure, so that the processing and forming are realized through a material increase manufacturing method.
Description
Technical Field
The invention relates to the technical field of airplane structure design, in particular to a high-bearing dot matrix lightweight connecting rod structure and application thereof.
Background
At present, the airplane structure lightweight technology is mainly developed from three directions of structural design optimization, manufacturing process and use of high-performance light materials to replace traditional materials. The application of composite materials to aircraft structures has been in history for decades, and revolutionary success is achieved for improving the performance of the aircraft. In recent years, the development of additive manufacturing processes has raised new challenges and opportunities for aircraft products. The development of simultaneous design and manufacturing optimization technology is greatly promoted by the appearance of the additive manufacturing process.
The main bearing connecting rod of the traditional airplane is mostly a traditional metal machine and is added with a structure, the structure weight is large, and the weight accounts for the high-class problems of the weight proportion of the sections. The section of the high-bearing connecting rod structure is reconstructed by combining an additive manufacturing technology and by means of a crystal lattice concept to form a space rod structure with a core layer of a periodic repeating unit, so that the weight of the high-bearing connecting rod structure is further reduced, and the method has important significance for optimizing the whole section structure and improving the performance of the airplane.
In the prior art, as shown in fig. 1, a patent "Attachment fixing for composite material structures" applies: US19990378563 provides a connecting structure of a composite material rod and a metal corrugated joint. The composite material is used for replacing metal to achieve the purpose of reducing weight, and the connection and load transmission between the composite material rod and the joint are realized through wavy connection, so that the composite material rod type structure is a split combined rod type structure. The split type connector connecting rods need to be mechanically connected through fasteners, the number of contact matching surfaces is large, assembly is complex, and compatibility among different materials needs to be considered.
Disclosure of Invention
In order to solve the above problems, the present invention provides a high-load lattice lightweight connecting rod structure, which realizes lightweight of the connecting rod structure while ensuring various aspects of performance of the connecting rod structure. In addition, the connecting rod structure in the invention is in an integrated optimization design, and the processing and forming are realized by a material increase manufacturing method through the weight reduction of the lattice grid structure.
According to a first aspect of the present invention, there is provided a high-bearing lattice lightweight link structure, including:
the annular rod section comprises an inner skin, an outer skin and an annular middle structure positioned between the inner skin and the outer skin;
a first connecting end and a second connecting end which are positioned at the two ends of the annular rod section and are used for connecting the load-transferring joints,
the annular intermediate structure is an annular space lattice network structure adopting octahedral lattice cells.
Furthermore, the annular space lattice network structure is composed of N connected octahedral lattice cells, the octahedral lattice cells are extended in X, Y, Z three directions to form a space lattice structure, N is not less than 3 and is an integer, the octahedral lattice cells comprise 12 connecting rods, an included angle of 60 degrees is formed between adjacent connecting rods, the space state of the 12 connecting rods is set according to a topological criterion, and 6 groups of continuous connecting rods in different directions are provided to form the stretching leading type cell.
Furthermore, the rod-to-thin ratio of a single connecting rod of the octahedral lattice cell is 1: 10.
Furthermore, the annular space lattice network structure and the inner skin and the outer skin are integrally formed.
Furthermore, the annular space lattice network structure comprises a first annular space lattice network structure and a second annular space lattice network structure, and an annular intermediate layer is arranged between the annular space lattice network structure and the second annular space lattice network structure.
Furthermore, a plurality of reinforcing ribs are arranged in the annular space lattice network structure, and the plurality of reinforcing ribs are uniformly distributed on the section of the annular space lattice network structure and are arranged between the inner skin and the outer skin.
Furthermore, the first connecting end and the second connecting end are fork lug joint structures.
Furthermore, the fork lug joint structure and the annular rod section are in smooth transition.
Furthermore, the annular rod section is of an equal straight annular section structure.
Furthermore, the high-bearing-capacity lattice lightweight connecting rod structure is integrally formed by adopting a laser additive manufacturing process and adopting a Ti-Ti64 titanium alloy material.
According to a second aspect of the present invention, there is provided a method for forming a high-load-bearing lattice lightweight connecting rod structure according to any one of the above aspects, wherein the high-load-bearing lattice lightweight connecting rod structure is integrally formed by a laser additive manufacturing process using a Ti-Ti64 titanium alloy material: and carrying out technological analysis on the numerical model of the lightweight connecting rod structure through technological simulation software, supplementing a printing support structure, guiding the numerical model into laser selective melting software for slicing, and sintering the numerical model on the substrate layer by layer until the component is formed.
According to a second aspect of the invention, there is provided a use of the high load-bearing lattice lightweight connecting rod structure according to any one of the above aspects in an engine hanger, the high load-bearing lattice lightweight connecting rod structure being connected between two load-carrying joints.
The invention has the beneficial effects that:
(1) the density of the metal lattice material is greatly lower than that of the traditional solid metal structure, and under the condition of low density and high porosity, the specific strength and specific rigidity of the metal lattice material are far higher than those of the traditional metal material, so that the bearing efficiency is greatly improved. The invention realizes the perfect combination of the traditional solid metal structure and the microscopic stereo truss unit formed by the lattice.
(2) The octahedral space lattice cell provided by the invention has the advantages that the space state is based on a topological principle, a force transmission path of a topological optimization component is utilized to form a stretching leading type cell, the axial deformation effect of a framework unit is mainly used for bearing load, the stretching is taken as a leading factor, the stretching leading type cell accords with the stress form and the characteristic of a lower connecting rod hung on an engine, the unit density and the section form are optimized through size optimization, and the structure weight is reduced.
(3) The traditional high-bearing connecting rod is generally formed by a high-strength steel machine, the structural functionality of the high-bearing connecting rod is guaranteed through a lattice topological lightweight technology, meanwhile, the structural weight of the connecting rod is remarkably reduced by combining a Ti-T64 titanium alloy material, a solid structure and a space lattice structure, and the high-bearing connecting rod has good benefits for the integral optimization of a structural section comprising the high-bearing connecting rod and the performance of a lifting section.
Drawings
The above features and advantages of the present invention will become apparent and more readily appreciated when considered in connection with the following drawings, in which:
FIG. 1 is a prior art split-type combination pole structure;
FIG. 2 is a schematic structural view of a high-load lattice lightweight connecting rod according to an embodiment of the present invention;
3 a-3 c are schematic cross-sectional views of two different ring-shaped rod segments of the high-load-bearing lattice lightweight connecting rod according to the embodiment of the invention;
FIG. 4a is a space lattice structure diagram of a lightweight connecting rod of a high-load lattice according to an embodiment of the present invention; FIG. 4b is a schematic diagram of a continuation of a lattice cell;
FIG. 5 is a schematic view of the assembly and application of the high-bearing lattice lightweight connecting rod according to the embodiment of the invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. The same or similar reference numbers in the drawings identify the same or similar structural features throughout.
In addition, the embodiments of the present invention described below with reference to the accompanying drawings are exemplary and are only for purposes of explaining the embodiments of the present invention, and are not limiting the present invention.
The additive manufacturing technology is a part manufacturing method based on a discrete-accumulation principle, and is different from the traditional material reduction manufacturing, and in recent years, the additive manufacturing technology is more and more widely applied. The method integrates multiple high and new technologies such as graphic processing, digital information and control, laser technology, electromechanical technology, material technology and the like of a computer, and has the main advantages of high material utilization rate, high technical complexity, no need of a model or a die and high production efficiency.
The additive manufacturing is developed towards the manufacturing direction of large-size components, the traditional machining manufacturing method is replaced by the additive manufacturing method, alloy powder or wire materials are used as raw materials, the raw materials can be stacked layer by layer through high-power laser in-situ metallurgical melting/rapid solidification, and direct net forming manufacturing of the fully-compact and high-performance large-size complex metal structural component is completed in one step from a component digital model.
In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "left", "right", "vertical", "horizontal", "inner", "outer", "upper", "lower", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the scope of the present invention.
The high-bearing dot matrix lightweight connecting rod structure according to the technical scheme of the invention comprises: the two fork lug joints are respectively positioned at the front end and the rear end of the annular rod section and are used for connecting the load-transmitting joints; the annular pole segment may comprise an inner skin, an annular intermediate structure (core layer), an intermediate layer, stiffeners, an outer skin. The fork lug joint and the annular rod section are in smooth transition.
The annular rod section is of an equal-straight annular section structure and comprises structural characteristics of an inner skin, a core layer, a middle layer, reinforcing ribs, an outer skin and the like.
The core layer is of a space lattice network structure and is integrally formed with the inner skin and the outer skin. The core layer lattice adopts octahedral lattice cells, which are composed of N connected octahedral lattice cells, so that the octahedral lattice cells extend in X, Y, Z three directions to form a spatial lattice structure. The octahedral cell is a multi-link structure, which comprises 12 links, wherein the adjacent links form an included angle of 60 degrees, and the space state is based on a topological criterion, and 6 groups of continuous links in different directions form a stretching leading cell.
The high-bearing lattice lightweight connecting rod structure can be integrally formed by adopting a laser additive manufacturing process and adopting a Ti-Ti64 titanium alloy material.
Examples
Referring to fig. 2, 3a to 3c, and 5, an embodiment of the present invention provides a high-load-bearing lattice lightweight connecting rod structure, including an annular rod segment 1 and a fork lug joint 2, and characterized in that: the fork lug joint 2 comprises two ends which are respectively used for connecting the load transmission joint; the annular pole segment 1 comprises an outer skin 11, a core layer 12, an intermediate layer 13, reinforcing ribs 14, an inner skin 15. The fork lug joint and the annular rod section are in smooth transition.
Referring to fig. 2, the high-bearing lattice lightweight connecting rod structure provided by the embodiment of the invention is integrally formed by a laser additive manufacturing process by using a Ti-Ti64 titanium alloy material.
Referring to fig. 3a to 3c, the annular rod 1 is of an equal straight annular cross-section structure and comprises an outer skin 11, a core layer 12, an intermediate layer 13, reinforcing ribs 14 and an inner skin 15. The cross-section of the ring-shaped rod 1 shown in the figures is in the form of one or more sections satisfying the structural function, and other combinations of cross-sectional features can be made with several simple changes, modifications, substitutions and variations without departing from the embodiments of the present invention, and shall be considered to belong to the scope of the present invention.
Referring to fig. 4a to 4b, the core layer 12 has a space lattice structure, and is integrally formed with the outer skin 11 and the inner skin 15. The lattice of the core layer 12 adopts an octahedral lattice cell 121 which is composed of N connected octahedral lattice cells, so that the octahedral lattice cells extend in X, Y, Z three directions to form a spatial lattice structure.
The octahedral cell 121 is a multi-link structure, which includes 12 links, the adjacent links form an angle of 60 degrees, and the space state has 6 sets of continuous links in different directions according to the topological criterion, forming a stretching dominant cell.
Referring to fig. 2 and 5, the high-load-bearing connecting rod assembly application is shown. The connecting rod 1, which is designed to be lightweight, is connected between the joint 100 and the joint 200 for transmitting axial loads.
While the foregoing is directed to embodiments of the present invention, the foregoing is illustrative and is not to be construed as limiting the present invention. For those skilled in the art to which the invention pertains, numerous simple changes, modifications, substitutions and alterations can be made without departing from the embodiments of the invention, and these should be considered as falling within the scope of the invention.
Claims (10)
1. The utility model provides a high lattice lightweight connecting rod structure that bears, its characterized in that, high lattice lightweight connecting rod structure that bears includes:
the annular rod section comprises an inner skin, an outer skin and an annular middle structure positioned between the inner skin and the outer skin;
a first connecting end and a second connecting end which are positioned at the two ends of the annular rod section and are used for connecting the load-transferring joints,
the annular intermediate structure is an annular space lattice network structure adopting octahedral lattice cells.
2. The lightweight high-load lattice connecting rod structure as claimed in claim 1, wherein the annular space lattice network structure is composed of N octahedral lattice cells connected with each other, such that the octahedral lattice cells extend in X, Y, Z three directions to form a space lattice structure, wherein N is not less than 3 and is an integer.
3. The structure of claim 2, wherein the octahedral lattice cell comprises 12 connecting rods, the adjacent connecting rods form an angle of 60 degrees, the space status of the 12 connecting rods is set according to a topological criterion, and there are 6 groups of continuous connecting rods with different directions to form a stretching-dominant cell.
4. The high load bearing lattice lightweight connecting rod structure of claim 2, wherein a rod-to-rod ratio of a single connecting rod of the octahedral lattice cell is 1: 10.
5. The high-load-bearing lattice lightweight connecting rod structure according to claim 1, wherein the annular space lattice network structure comprises a first annular space lattice network structure and a second annular space lattice network structure, and an annular intermediate layer is provided between the annular space lattice network structure and the second annular space lattice network structure.
6. The high-bearing-capacity lattice lightweight connecting rod structure as claimed in claim 1, wherein the annular space lattice network structure is a single annular space lattice network structure, and a plurality of reinforcing ribs are arranged on the single annular space lattice network structure, and are uniformly distributed on the cross section of the single annular space lattice network structure and are arranged between the inner skin and the outer skin.
7. The high load-bearing lattice lightweight connecting rod structure of claim 1, wherein the annular space lattice network structure is integrally formed with the inner and outer skins.
8. The high load bearing lattice lightweight connecting rod structure of claim 1, wherein said annular rod segments are of a straight annular cross-sectional structure.
9. The method for forming the high-bearing-capacity lattice lightweight connecting rod structure according to any one of claims 1 to 8, wherein the high-bearing-capacity lattice lightweight connecting rod structure is integrally formed by a laser additive manufacturing process by using a Ti-Ti64 titanium alloy material: and carrying out technological analysis on the numerical model of the lightweight connecting rod structure through technological simulation software, supplementing a printing support structure, guiding the numerical model into laser selective melting software for slicing, and sintering the numerical model on the substrate layer by layer until the component is formed.
10. Use of a high load lattice lightweight connecting rod structure according to any one of claims 1 to 8 in an engine hanger, wherein the high load lattice lightweight connecting rod structure is connected between two load-carrying joints.
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| CN202011049369.3A CN112061405A (en) | 2020-09-29 | 2020-09-29 | High-bearing-capacity dot matrix lightweight connecting rod structure and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881128A (en) * | 2021-02-04 | 2021-06-01 | 航天科工防御技术研究试验中心 | Tensile sample for additive manufacturing lattice structure material and tensile test method |
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| US20200283121A1 (en) * | 2019-03-09 | 2020-09-10 | Massachusetts Institute Of Technology | Elastic Shape Morphing of Ultra-light Structures by Programmable Assembly |
| CN212332985U (en) * | 2020-09-29 | 2021-01-12 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | High-bearing-capacity light-weight dot matrix connecting rod structure |
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2020
- 2020-09-29 CN CN202011049369.3A patent/CN112061405A/en active Pending
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| CN102390136A (en) * | 2011-08-16 | 2012-03-28 | 西安交通大学 | Method for preparing multilayered lattice metal and foamed aluminium composite material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112881128A (en) * | 2021-02-04 | 2021-06-01 | 航天科工防御技术研究试验中心 | Tensile sample for additive manufacturing lattice structure material and tensile test method |
| CN112881128B (en) * | 2021-02-04 | 2023-03-21 | 航天科工防御技术研究试验中心 | Tensile sample for additive manufacturing lattice structure material and tensile test method |
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