CN116495023A - Foam metal filled bamboo-like sandwich circular tube and preparation method thereof - Google Patents
Foam metal filled bamboo-like sandwich circular tube and preparation method thereof Download PDFInfo
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- CN116495023A CN116495023A CN202310397718.8A CN202310397718A CN116495023A CN 116495023 A CN116495023 A CN 116495023A CN 202310397718 A CN202310397718 A CN 202310397718A CN 116495023 A CN116495023 A CN 116495023A
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- cylinder
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 41
- 239000002184 metal Substances 0.000 title claims abstract description 41
- 239000006260 foam Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011664 nicotinic acid Substances 0.000 claims abstract description 19
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 16
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 16
- 241001330002 Bambuseae Species 0.000 claims abstract description 16
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 16
- 239000011425 bamboo Substances 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims description 53
- 229910000838 Al alloy Inorganic materials 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 9
- 239000004088 foaming agent Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000011812 mixed powder Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 claims description 4
- 239000006262 metallic foam Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003139 buffering effect Effects 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 238000007569 slipcasting Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
- B22F7/004—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part
- B22F7/006—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part the porous part being obtained by foaming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F19/00—Wheel guards; Bumpers; Obstruction removers or the like
- B61F19/04—Bumpers or like collision guards
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses a foam metal filling bamboo-like sandwich round pipe and a preparation method thereof in the field of safety protection of rail transit vehicles. The round tube is designed into a bamboo shape, the local reinforcement effect of the bionic joint is utilized to improve the bearing capacity and stability of the structure, so that the load is effectively dispersed when the vehicle collides, and the purpose of buffering is further achieved; and the inner pipe and the outer pipe are nested and filled with foam metal, so that the deformation mode of the inner pipe and the outer pipe is improved and the energy absorption capacity is enhanced by utilizing the filling effect of foam aluminum while the light weight of the pipe is realized, the bamboo-like pipe is ensured to have higher specific energy absorption and energy absorption efficiency when the vehicle collides, and the passive safety protection performance of the railway vehicle is improved.
Description
Technical Field
The invention belongs to the field of passive safety protection of rail transit vehicles, and particularly relates to a foam metal filled bamboo-like sandwich round tube and a preparation method thereof.
Background
The main functions of the energy absorbing device for the rail transit vehicle at present are as follows: when the vehicle is in unavoidable collision, the plastic deformation and the damage of the vehicle end energy absorbing device are used for absorbing collision energy, so that the movement gesture of the train is prevented from developing in a worse direction, the train cab and the survival space of passengers are ensured not to be damaged more, the personal safety of drivers and passengers is protected to the greatest extent, and the loss caused by collision accidents is reduced as much as possible. Most of the existing energy absorbing devices of railway vehicles are of metal thin-wall structures, including axial crushing type, transverse bending type, expansion type, splitting type, cutting type and the like, and collision energy is dissipated through stable and controllable deformation modes so as to achieve the purpose of buffering longitudinal impact of a train.
The publication No. CN102521449A discloses a design method of an axisymmetric deformation rectangular tubular energy absorbing device, which comprises the steps of determining the materials and the dimensions of the rectangular tubular energy absorbing device according to a mathematical model; reducing the length of the rectangular tubular energy absorber according to [ 1); 2) A movable support is additionally arranged on the axial direction of the rectangular tubular energy absorbing device; 3) Reinforcing ribs are radially added on the rectangular tubular energy absorbing device; at least one of which enhances the bending stiffness of the rectangular tubular energy absorbing device; a movable support is additionally arranged on the axial direction of the rectangular tubular energy absorbing device; reinforcing ribs are radially added on the rectangular tubular energy absorbing device.
The patent provides a design method for the thin-wall square tube of the railway vehicle, which can provide technical guidance for manufacturing the thin-wall square tube of the railway vehicle, and the thin-wall square tube of the railway vehicle has the advantages of lighter structure and lower manufacturing difficulty, but the railway vehicle collides with the characteristics of high impact energy, high speed and the like, and the energy absorption capacity of the single thin-wall square tube is limited, so that the problems of lower compressive strength, insufficient bearing capacity, axial deformation instability and the like can occur due to the fact that the impact energy is larger and the bearing area is uneven. Therefore, we propose a foam metal filled bamboo-like sandwich round tube and a preparation method thereof based on the energy absorption characteristics of the bamboo tube.
Disclosure of Invention
The invention aims to provide a foam metal filled bamboo-like sandwich round pipe and a preparation method thereof, and the bamboo-like sandwich round pipe is prepared by utilizing the advantages of light weight, strong bearing capacity, high energy absorption efficiency, uniform stress of the round pipe, stable deformation and the like of the bamboo-like structure, so as to solve the problems of weak bearing capacity, low energy absorption efficiency and high processing cost caused by uneven stress area of a thin-wall square pipe of a railway vehicle in the prior art.
In order to achieve the above object, the technical scheme of the present invention is as follows: the utility model provides a imitative bamboo sandwich pipe is filled to foam metal, the pipe is the thick bamboo tube form, including nested inner tube and outer tube, the packing has foam metal between inner tube and the outer tube, uses outer tube middle part as the central symmetry to be equipped with bionic joint on the outer tube lateral wall.
After the scheme is adopted, the following beneficial effects are realized:
1. according to the scheme, compared with the square tube, the bamboo-like sandwich round tube has the advantages of being good in stability, high in bearing capacity and high in compression resistance, capable of absorbing more impact energy during vehicle collision, capable of protecting personal safety of drivers and passengers to the greatest extent and reducing loss caused by collision accidents as far as possible by utilizing the characteristic that the round tube is large in bearing area and even in bearing force;
2. the round tube is designed into a bamboo tube shape, and the local reinforcing effect of the bionic joint is utilized, so that impact load can be effectively dispersed, structural instability is avoided, and the aim of buffering is further achieved when a vehicle collides;
3. the mode that the inner pipe and the outer pipe are nested and filled with foam metal is adopted in the scheme, so that the round pipe is light in weight, the deformation mode of the inner pipe and the outer pipe is improved by utilizing the filling effect of foam aluminum, the energy absorption capacity is enhanced, the bamboo-like round pipe is ensured to have higher specific energy absorption and energy absorption efficiency when a vehicle collides, and the passive safety protection performance of a railway vehicle is improved.
Further, the inner tube and the outer tube are both made of aluminum alloy materials.
The beneficial effects are that: the bamboo-like sandwich round tube is prepared by utilizing the advantages of light weight and high strength of the aluminum alloy material, so that the bamboo-like sandwich round tube is light in weight and high in strength, can absorb more collision energy when a vehicle collides, plays a role in buffering, improves the passive safety performance of a railway vehicle, and reduces the loss caused by collision accidents.
Further, aluminum foam is used as the foam metal filled between the inner tube and the outer tube.
The beneficial effects are that: the advantages of light weight, high strength, thermal stability, low density, corrosion resistance/abrasion resistance, easiness in processing and forming and the like of the foamed aluminum are utilized, and the fully-opened pore structure is combined, so that the bamboo-like round tube has good energy absorption characteristics and efficiency, and the light weight design of the train energy absorption structure is realized while the train impact energy is effectively dissipated.
Further, the lengths of the inner pipe and the outer pipe are 490-510mm, the pipe diameter of the outer pipe is 95-105mm, the thickness of the outer pipe is 2-3mm, the pipe diameter of the inner pipe is 82-92mm, the thickness of the inner pipe is 2-3mm, the filling thickness of foam metal is 3-5mm, the diameter of the bionic joint is 102-106mm, the height of the bionic joint is 8-12mm, and the center line of the bionic joint is located at 130-140mm away from the end part of the circular pipe.
The beneficial effects are that: based on drop hammer impact tests and energy absorption characteristics of bamboo tubes with different geometric dimensions, the geometric dimension range of the bamboo-like round tube is determined, so that the bamboo-like round tube has better bearing capacity and energy absorption effect.
Further, the preparation method of the foam metal filled bamboo-like sandwich round tube comprises the following steps:
step a, smelting an aluminum ingot with the purity of 99.8% in a smelting furnace, and adding a metal mixture in the smelting process to prepare an aluminum alloy solution;
step b, adding a hardening agent into the aluminum alloy solution according to a proportion, injecting the solution into a die set after degassing, and cooling and shaping to obtain the bamboo-like round tube;
step c, preparing aluminum alloy powder and foaming agent powder by an atomization method, and mixing the aluminum alloy powder and the foaming agent powder to prepare mixed powder for later use;
and d, filling mixed powder between the inner tube and the outer tube by adopting a powder feeding device when demolding the bamboo-like round tube, and foaming to obtain the foam metal-filled bamboo-like sandwich round tube.
The beneficial effects are that: the aluminum ingot with high purity is used as a main raw material, and the aluminum ingot is matched with a die set to prepare the bamboo-like round tube with light weight and high strength by one-step molding, so that the processing difficulty and cost are reduced, the aluminum alloy powder and the foaming agent powder prepared by an atomization method are convenient to manufacture in batches, the granularity is uniform, the aluminum alloy powder and the foaming agent powder are filled between the inner tube and the outer tube, the foamed aluminum with uniform pores can be obtained, and the demolding and the filling of the foamed aluminum are simultaneously carried out, so that the adhesion between the foamed aluminum and the inner tube and the outer tube is tighter, the ductility of the bamboo-like round tube is improved, and the bamboo-like round tube has better energy absorption property.
Further, the metal mixture includes Mn, fe, cu, mg and Zn in the mass percentages of 0.02-0.04, 0.1-0.3, 0.04-0.06, 0.01-0.03 and 0.04-0.06, respectively.
The beneficial effects are that: the compression resistance and stability of the aluminum alloy round tube are improved by adding the metal mixture.
Further, the die set comprises a first die, a second die and a third die, wherein the first die comprises a first base and a hollow cylinder which are integrally formed, a powder feeding cavity is arranged in the hollow cylinder, one end, far away from the first base, of the powder feeding cavity is communicated with a powder feeding hole, the second die comprises a second base, a grouting hole is formed in the second base, a solid cylinder and a first hollow semi-cylinder which are integrally formed with the second base are sequentially arranged at the bottom of the second base from inside to outside by taking the center of the second base as the center, the third die comprises a second hollow semi-cylinder, and bionic joint grooves are formed in the inner side walls of the first hollow semi-cylinder and the second hollow semi-cylinder; the assembly of the die set comprises: the solid cylinder of the second mould is inserted into the hollow cylinder of the first mould, the second hollow cylinder is combined with the first hollow cylinder, the gap between the solid cylinder and the hollow cylinder forms an inner pipe grouting chamber, and the gap between the hollow cylinder and the first hollow cylinder and the gap between the hollow cylinder and the second hollow cylinder form an outer pipe grouting chamber.
The beneficial effects are that: because imitative bamboo pipe has bionical festival to first mould is benchmark, forms inner tube slip casting cavity and outer tube slip casting cavity with second mould and third mould combination, can make inner tube, outer tube and bionical festival one shot forming simultaneously, reduces the processing degree of difficulty, reduces processing cost, and follow-up drawing of patterns is convenient, can not lead to the pipe to warp, carries out the packing of foam aluminium through sending powder cavity and powder hole when the drawing of patterns, makes foam aluminium and inner tube and outer tube bond inseparabler, improves imitative bamboo pipe's ductility, makes imitative bamboo pipe have better energy-absorbing characteristic.
Further, the simultaneous demolding and filling of the mixture is specifically: and fixing the second die and the third die, inserting the output end of the powder feeding device into the powder feeding cavity of the first die to the position of the powder feeding hole, separating the first die from the second die and the third die, and filling the mixture between the inner tube and the outer tube through the powder feeding hole by the powder feeding device when the first die is separated.
The beneficial effects are that: when the bamboo-like round tube is demolded, the powder feeding cavity and the powder feeding holes are used for filling foamed aluminum, so that the foamed aluminum is tightly adhered to the inner tube and the outer tube, the ductility of the bamboo-like round tube is improved, and the bamboo-like round tube has better stability and crashworthiness.
Drawings
Fig. 1 is an isometric view of a metal foam filled bamboo-like sandwich round tube in accordance with an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a method for preparing a foam metal filled bamboo-like sandwich round tube according to an embodiment of the invention.
Fig. 3 is an isometric view of a first mold according to an embodiment of the invention.
Fig. 4 is an isometric view of a second mold according to an embodiment of the invention.
Fig. 5 is an isometric view of a third mold according to an embodiment of the invention.
Fig. 6 is a cross-sectional view of a die set according to an embodiment of the invention.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the outer tube 1, the inner tube 2, the foam metal 3, the bionic joint 4, the first die 5, the hollow cylinder 51, the powder feeding chamber 511, the powder feeding hole 512, the first base 52, the second die 6, the second base 61, the grouting hole 611, the solid cylinder 62, the first hollow semi-cylinder 63, the third die 7, the bionic joint groove 8, the inner tube grouting chamber 9 and the outer tube grouting chamber 10.
Example 1:
an example is substantially as shown in figure 1: the utility model provides a imitative bamboo sandwich pipe is filled to foam metal, the pipe is the thick bamboo tube form, including nested inner tube 2 and outer tube 1, it has foam metal 3 to fill between inner tube 2 and the outer tube 1, uses outer tube 1 middle part as the central symmetry to be equipped with bionic festival 4 on the outer tube 1 lateral wall.
Example 2:
the difference from the above embodiment is that both the inner tube 2 and the outer tube 1 are made of an aluminum alloy material.
Example 3:
the difference from the above embodiment is that the foamed metal 3 filled between the inner tube 2 and the outer tube 1 is made of foamed aluminum.
Example 4:
the difference from the above embodiment is that the lengths of the inner tube 2 and the outer tube 1 are 500mm, the tube diameter of the outer tube 1 is 100mm, the thickness of the outer tube 1 is 2.5mm, the tube diameter of the inner tube 2 is 87mm, the thickness of the inner tube 2 is 2.5mm, the filling thickness of the foam metal 3 is 4mm, the diameter of the bionic joint 4 is 104mm, the height of the bionic joint 4 is 10mm, and the center line of the bionic joint 4 is located 135mm away from the end of the circular tube.
Example 5:
the difference with the embodiment is that as shown in fig. 2, the preparation method of the foam metal filled bamboo-like sandwich round tube comprises the following steps:
step a, smelting an aluminum ingot with the purity of 99.8 percent in a smelting furnace, and adding a metal mixture in the smelting process, wherein the metal mixture comprises Mn, fe, cu, mg and Zn with the mass percentages of 0.02-0.04, 0.1-0.3, 0.04-0.06, 0.01-0.03 and 0.04-0.06 respectively to prepare an aluminum alloy solution;
step b, adding a hardening agent into the aluminum alloy solution according to a proportion, injecting the solution into a die set after degassing, and cooling and shaping to obtain the bamboo-like round tube;
step c, preparing aluminum alloy powder and foaming agent powder by an atomization method, and mixing the aluminum alloy powder and the foaming agent powder to prepare mixed powder for later use;
and d, filling mixed powder between the inner tube 2 and the outer tube 1 by adopting a powder feeding device when demolding the bamboo-like round tube, and foaming to obtain the foam metal-filled bamboo-like sandwich round tube.
Example 6:
3-6, the die set comprises a first die 5, a second die 6 and a third die 7, wherein the first die 5 comprises a first base 52 and a hollow cylinder 51 which are integrally formed, a powder feeding cavity 511 is arranged in the hollow cylinder 51, one end of the powder feeding cavity 511, which is far away from the first base 52, is communicated with a powder feeding hole 512, the second die 6 comprises a second base 61, a grouting hole 611 is formed in the second base 61, a solid cylinder 62 and a first hollow semi-cylinder 63 which are integrally formed with the second base 61 are sequentially arranged at the bottom of the second base 61 from inside to outside by taking the center of the second base 61 as the center, the third die 7 comprises a second hollow semi-cylinder, and bionic joint grooves 8 are formed in the inner side walls of the first hollow semi-cylinder 51 and the second hollow semi-cylinder; the assembly of the die set comprises: the solid cylinder 62 of the second mold 6 is inserted into the hollow cylinder 51 of the first mold 5, the second hollow cylinder is combined with the first hollow cylinder 63, the gap between the solid cylinder 62 and the hollow cylinder 51 forms the inner pipe grouting chamber 9, and the gap between the hollow cylinder 51 and the first hollow cylinder 63, the second hollow cylinder forms the outer pipe grouting chamber 10.
The specific implementation process is as follows:
in this embodiment, the contact surfaces of the first hollow semi-cylinder 63 and the second hollow semi-cylinder may be reinforced by the clamping groove and the clamping block, and the bottom of the first hollow semi-cylinder 63 and the second hollow semi-cylinder and the top of the first base 52 may be fixed by the clamping groove and the clamping block.
Because imitative bamboo pipe has bionical festival to first mould 5 is benchmark, with second mould 6 and third mould 7 combination formation inner tube slip casting cavity 9 and outer tube slip casting cavity 10, can make inner tube 2, outer tube 1 and bionical festival 4 one shot forming simultaneously, reduce the processing degree of difficulty, reduce processing cost, and follow-up drawing of patterns is convenient, only need demolish third mould 7 in proper order, second mould 6 and first mould 5, can not lead to the pipe to warp, carry out foam metal 3's packing through send powder cavity 511 and send powder hole 512 when the drawing of patterns, make foam metal 3 and inner tube 2 and outer tube 1 bond inseparabler, improve imitative bamboo pipe's ductility, make imitative bamboo pipe have better energy-absorbing characteristic.
Example 7:
the difference from the above examples is that the simultaneous demolding and filling of the mixture is in particular: the second mold 6 and the third mold 7 are fixed, the output end of the powder feeding device is inserted into the powder feeding chamber 511 of the first mold 5 to the position of the powder feeding hole 512, the first mold 5 starts to be separated from the second mold 6 and the third mold 7, and when the first mold 5 is separated, the powder feeding device fills the mixture between the inner tube 2 and the outer tube 1 through the powder feeding hole 512.
The specific implementation process is as follows:
filling of foamed aluminum is performed through the powder feeding chamber 511 and the powder feeding holes 512 during demolding, so that the foamed aluminum is tightly adhered to the inner tube 2 and the outer tube 1, the ductility and the stability of the bamboo-like round tube are improved, and the bamboo-like round tube has better energy absorption capacity.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing is merely an embodiment of the present invention, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present invention, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. The utility model provides a imitative bamboo sandwich pipe is filled to foam metal which characterized in that: the circular tube is in a bamboo tube shape and comprises an inner tube and an outer tube which are nested, foam metal is filled between the inner tube and the outer tube, and bionic joints are symmetrically arranged on the side wall of the outer tube by taking the middle part of the outer tube as the center.
2. The metal foam filled bamboo-like sandwich round tube of claim 1, wherein: the inner tube and the outer tube are both made of aluminum alloy materials.
3. The metal foam filled bamboo-like sandwich round tube of claim 1, wherein: the foam metal filled between the inner tube and the outer tube adopts foam aluminum.
4. The metal foam filled bamboo-like sandwich round tube of claim 1, wherein: the lengths of the inner pipe and the outer pipe are 490-510mm, the pipe diameter of the outer pipe is 95-105mm, the thickness of the outer pipe is 2-3mm, the pipe diameter of the inner pipe is 82-92mm, the thickness of the inner pipe is 2-3mm, the filling thickness of foam metal is 3-5mm, the diameter of the bionic joint is 102-106mm, the height of the bionic joint is 8-12mm, and the center line of the bionic joint is located 130-140mm away from the end part of the circular pipe.
5. A preparation method of a foam metal filled bamboo-like sandwich round tube is characterized by comprising the following steps: the method comprises the following steps:
step a, smelting an aluminum ingot with the purity of 99.8% in a smelting furnace, and adding a metal mixture in the smelting process to prepare an aluminum alloy solution;
step b, adding a hardening agent into the aluminum alloy solution according to a proportion, injecting the solution into a die set after degassing, and cooling and shaping to obtain the bamboo-like round tube;
step c, preparing aluminum alloy powder and foaming agent powder by an atomization method, and mixing the aluminum alloy powder and the foaming agent powder to prepare mixed powder for later use;
and d, filling mixed powder between the inner tube and the outer tube by adopting a powder feeding device when demolding the bamboo-like round tube, and foaming to obtain the foam metal-filled bamboo-like sandwich round tube.
6. The method for preparing the foam metal filled bamboo-like sandwich round tube according to claim 5, which is characterized in that: the metal mixture comprises Mn, fe, cu, mg and Zn with mass percentages of 0.02-0.04, 0.1-0.3, 0.04-0.06, 0.01-0.03 and 0.04-0.06 respectively.
7. The method for preparing the foam metal filled bamboo-like sandwich round tube according to claim 5, which is characterized in that: the die set comprises a first die, a second die and a third die, wherein the first die comprises a first base and a hollow cylinder which are integrally formed, a powder feeding cavity is formed in the hollow cylinder, one end, far away from the first base, of the powder feeding cavity is communicated with a powder feeding hole, the second die comprises a second base, a grouting hole is formed in the second base, a solid cylinder and a first hollow semi-cylinder which are integrally formed with the second base are sequentially formed in the bottom of the second base from inside to outside by taking the center of the second base as the center, the third die comprises a second hollow semi-cylinder, and bionic joint grooves are formed in the inner side walls of the first hollow semi-cylinder and the second hollow semi-cylinder; the assembly of the die set comprises: the solid cylinder of the second mould is inserted into the hollow cylinder of the first mould, the second hollow cylinder is combined with the first hollow cylinder, the gap between the solid cylinder and the hollow cylinder forms an inner pipe grouting chamber, and the gap between the hollow cylinder and the first hollow cylinder and the gap between the hollow cylinder and the second hollow cylinder form an outer pipe grouting chamber.
8. The method for preparing the foam metal filled bamboo-like sandwich round tube according to claim 7, which is characterized in that: and fixing the second die and the third die, inserting the output end of the powder feeding device into the powder feeding cavity of the first die to the position of the powder feeding hole, separating the first die from the second die and the third die, and filling the mixture between the inner tube and the outer tube through the powder feeding hole by the powder feeding device when the first die is separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310397718.8A CN116495023B (en) | 2023-04-14 | 2023-04-14 | Foam metal filled bamboo-like sandwich circular tube and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310397718.8A CN116495023B (en) | 2023-04-14 | 2023-04-14 | Foam metal filled bamboo-like sandwich circular tube and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116495023A true CN116495023A (en) | 2023-07-28 |
| CN116495023B CN116495023B (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310397718.8A Active CN116495023B (en) | 2023-04-14 | 2023-04-14 | Foam metal filled bamboo-like sandwich circular tube and preparation method thereof |
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| KR20020004755A (en) * | 2000-07-07 | 2002-01-16 | 권영기 | Apparatus and method for producing a closed-type foamed aluminum |
| WO2002022295A1 (en) * | 2000-09-13 | 2002-03-21 | Neue Materialien Fürth GmbH | Method for producing a moulded body from foamed metal |
| JP2004203202A (en) * | 2002-12-25 | 2004-07-22 | Kobe Steel Ltd | Energy absorption member for vehicle body |
| CN102826060A (en) * | 2012-09-21 | 2012-12-19 | 吉林大学 | Bionic energy absorption pipe of bamboo-like structure |
| CN106515630A (en) * | 2016-11-11 | 2017-03-22 | 吉林大学 | Bumper system imitating bamboo structure |
| CN107512316A (en) * | 2017-08-16 | 2017-12-26 | 吉林大学 | A kind of segment type automobile B-column structure |
| CN212582900U (en) * | 2020-04-29 | 2021-02-23 | 南京林业大学 | Filling foam reinforced raw bamboo structure |
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2023
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020004755A (en) * | 2000-07-07 | 2002-01-16 | 권영기 | Apparatus and method for producing a closed-type foamed aluminum |
| WO2002022295A1 (en) * | 2000-09-13 | 2002-03-21 | Neue Materialien Fürth GmbH | Method for producing a moulded body from foamed metal |
| JP2004203202A (en) * | 2002-12-25 | 2004-07-22 | Kobe Steel Ltd | Energy absorption member for vehicle body |
| CN102826060A (en) * | 2012-09-21 | 2012-12-19 | 吉林大学 | Bionic energy absorption pipe of bamboo-like structure |
| CN106515630A (en) * | 2016-11-11 | 2017-03-22 | 吉林大学 | Bumper system imitating bamboo structure |
| CN107512316A (en) * | 2017-08-16 | 2017-12-26 | 吉林大学 | A kind of segment type automobile B-column structure |
| CN212582900U (en) * | 2020-04-29 | 2021-02-23 | 南京林业大学 | Filling foam reinforced raw bamboo structure |
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| CN116495023B (en) | 2024-03-08 |
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