A kind of ripple square tube core body sandwich and preparation method thereof
【Technical field】
The invention belongs to technical field of composite materials, and in particular to a kind of ripple square tube core body sandwich and its preparation side
Method, particularly a kind of composite with multi-functional characteristic.
【Background technology】
Ultra light porous metal material is in the last few years as prepared by material and mechanical manufacturing technology is developed rapidly
An existing class Multifunction material.This kind of material has high porosity, and its corresponding micro-structural can be divided into unordered by regular degree
With orderly two major class, the former includes closed-cell foam material and open-cell foam materials, and the latter includes two-dimensional lattice material (such as ripple
Structure, honeycomb etc.) and three-dimensional truss structure (such as pyramid structure, X-type structure).
In recent years, the light dot matrix structure with multi-functional characteristic is applied to engineering design increasingly by engineering circles
Favor, such as heat-conductive characteristic, shock resistance, detonation energy.For in the research of the lattice structure capability of antidetonance, Fu Jini
Sub- university Wadley professors team proposes a kind of to be horizontally staggered the straight square tube of arrangement as the sandwich of core body, structure tool
The characteristics of having preparation process is simple, but because rhs-structure tube wall is susceptible to Euler's buckling, cause its load-carrying properties and energy-absorbing
It is less efficient.Based on above reason, on the basis of Nogata tubular construction, the present invention replaces straight square tube using ripple square tube, both may be used
The characteristics of succession straight tube structure prepares simple, can improve its load-carrying properties and energy absorbing efficiency, while can further strengthen the knot again
The heat transfer property of structure.
【The content of the invention】
The technical problems to be solved by the invention are to be directed to above-mentioned deficiency of the prior art, there is provided one kind has mechanics concurrently
The multifunctional composite of load-carrying properties (specific strength, specific stiffness, than energy-absorbing) and heat management function.Replace by with ripple square tube
Straight square tube and obtain the ripple square tube core body sandwich with multi-functional characteristic.
The present invention uses following technical scheme:
A kind of ripple square tube core body sandwich, including top panel and lower panel, set between the top panel and lower panel
Ripple square tube core body is equipped with, the wavy channel core body is arranged parallel to each other by multiple hollow ripple square tubes and constituted.
Further, the bellows-shaped of the ripple square tube is sine bellows.
Further, the top panel is different with the thickness of lower panel.
Further, the top panel, lower panel and ripple square tube are by stainless steel, aluminium alloy or titanium alloy material
Any one is made.
A kind of preparation method of ripple square tube core body sandwich, comprises the following steps:
S1, straight square tube bending is made ripple square tube by sine bellows;
S2, by the plate cutting of smooth mistake into top panel and lower panel;
S3, the cleaning top panel, lower panel and ripple square tube, are put into dry for standby in dryer;
S4, be parallel to each other multiple ripple square tubes the corrugated square tube core body of assembling, and fixation is standby;
S5, ripple square tube core body described in step S4 is connected with top panel, lower panel described in step S3 it is made ripple square tube
Core body sandwich.
Further, in step S1, the ripple Box Section is square section or rectangular cross-sectional.
Further, in step S4, the ripple square tube is ripple square tube core body by 1~2 times of tube wall spacing assembled parallel.
Further, in step S4, phase difference is 0 °~180 ° between the adjacent ripple square tube.
Further, in the step S5, vacuum 10-2~10-3Pa is kept, is risen to from room temperature with 1 DEG C/min speed
550~1200 DEG C, the top panel, ripple square tube core body and lower panel are made by the ripple square tube core body using high temperature brazing
Sandwich, is incubated 10min~60min, slow cooling to room temperature.
Compared with prior art, the present invention at least has the advantages that:
The present invention provides a kind of ripple square tube core body sandwich, is made up of top panel, ripple square tube core body and lower panel,
Straight square tube is replaced by using ripple square tube and the ripple square tube core body sandwich with multi-functional characteristic is obtained, makes it in mistake
It is leading passage flowing coefficient of heat conduction enhancing more than 50% to cross stream, and the structure is further carried on the basis of Nogata tubular construction
High specific strength, specific stiffness and compare energy absorption characteristics.
Further, sine bellows square tube can be improved while the flowing heat transfer characteristic of ripple square tube core body is improved
The resistance to compression stability of sandwich.
Further, certain special occasions, such as shock resistance or antiknock situation, using upper and lower panel not uniform thickness design are being considered
The mechanical characteristic of ripple square tube core body sandwich can further be improved.
The present invention also provides a kind of ripple square tube core body sandwich preparation method, by sine bellows by straight square tube bending system
Corrugated square tube, by plate, lower panel and ripple square tube above cutting by after drying and processing, according to a determining deviation and phase difference
Connection is made sandwich, replaces straight square tube by using ripple square tube and obtains the ripple square tube core body with multi-functional characteristic
Sandwich, because square tube type core body can need to be designed with the contact area of upper and lower panel according to cutting performance, it is not necessary to
Special jig is processed on core body, so as to simplify processing technology, the structure is further on the basis of Nogata tubular construction
Improve specific strength, specific stiffness and compare energy absorption characteristics.
Further, the flow regime of different fluid can be controlled by changing ripple lath phase difference, is optimal stream
Dynamic heat transfer coefficient, wavy channel core body relative density can be changed by adjusting ripple square tube spacing, and structure is improved to greatest extent
Mechanical property.
Further, the present invention carries out the welding of upper and lower panel and core body, the method operation letter using Vacuum Soldering Technology
Just, technology maturation, panel is high with core body bonding strength.
In sum, structure of the invention has high specific strength, high specific stiffness and excellent thermal conduction characteristic, in space flight boat
Sky, ship, automobile, machinery and field of civil engineering have wide application prospect, especially in the load knot required with heat transfer
Had a extensive future in structure.
Below by drawings and Examples, technical scheme is described in further detail.
【Brief description of the drawings】
Fig. 1 is the structural representation of ripple square tube core body sandwich of the present invention;
Fig. 2 is ripple rhs-structure schematic diagram of the present invention.
Wherein:1. top panel;2. ripple square tube;3. ripple square tube core body;4. lower panel.
【Specific embodiment】
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected;Can
Being to mechanically connect, or electrically connect;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
Two connections of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Refer to shown in Fig. 1 and Fig. 2, the invention discloses a kind of ripple square tube core body sandwich, including the He of top panel 1
Lower panel 4, is provided with ripple square tube core body 3 between the top panel 1 and lower panel 4, the wavy channel core body 3 is by multiple ripples
Line square tube 2 is parallel to each other composition.
Wherein, the bellows-shaped of the ripple square tube is sine bellows, the thickness of top panel 1 and lower panel 4 can with identical,
Can also differ, preferred thickness is different.Top panel 1, lower panel 4 and ripple square tube 2 are by stainless steel, aluminium alloy or titanium alloy material
Material is made.
Invention additionally discloses a kind of ripple square tube core body sandwich preparation method, comprise the following steps:
S1, straight square tube bending is made ripple square tube by sine bellows;
The ripple Box Section is square section or rectangular cross-sectional;
S2, by the plate cutting of smooth mistake into top panel and lower panel;
S3, the cleaning top panel, lower panel and ripple square tube, are put into dry for standby in dryer;
S4, be parallel to each other multiple ripple square tubes the corrugated square tube core body of assembling, and fixation is standby;
The ripple square tube is ripple square tube core body by 1~2 times of tube wall spacing assembled parallel;Between the adjacent ripple square tube
Phase difference is 0 °~180 °;
S5, ripple square tube core body described in step S4 is connected with top panel, lower panel described in step S3 it is made ripple square tube
Core body sandwich.
Keep vacuum 10-2~10-3Pa, rises to 550~1200 DEG C, using high temperature brazing with 1 DEG C/min speed from room temperature
The top panel, ripple square tube core body and lower panel are made the ripple square tube core body sandwich, insulation 10min~
60min, slow cooling to room temperature.
Embodiment one:
1) 1060 aluminium alloy straight square tubes are made sine bellows square tube by regulation requirement first by bending machine;
2) 1060 aluminum alloy plate materials of smooth mistake are cut into top panel and lower panel using line cutting technology;
3) go to degrease and rusty stain after cleaning top panel, lower panel and ripple square tube, be put into dry for standby in dryer;
4) ripple square tube is assembled to be formed ripple square tube core body in parallel to each other by 1 times of tube wall spacing and 90 ° of phase differences, and
Fix standby with frock;
5) by uniform commercially available aluminium soldering cream at ripple square tube core body and upper and lower panel binding site, in an oven 40~50
DEG C drying, be then charged into being welded in high temperature brazing stove, slow cooling to room temperature is come out of the stove and obtains ripple square tube core body after the completion of welding
Sandwich plate.
The soldering:Vacuum degree control is 10-3Pa, 550~620 DEG C of insulation 10min are risen to 1 DEG C/min speed from room temperature
~1h.
Embodiment two:
1) TC4 titanium alloys straight square tube is made semicircle ripple square tube by regulation requirement first by bending machine;
2) the TC4 titanium alloy plates of smooth mistake are cut into top panel and lower panel using line cutting technology;
3) go to degrease and rusty stain after cleaning top panel, lower panel and ripple square tube, be put into dry for standby in dryer;
4) ripple square tube is assembled to be formed ripple square tube core body in parallel to each other by 2 times of tube wall spacing and 180 ° of phase differences,
And fix standby with frock;
5) by the face uniform application Ag base solder pastes that ripple square tube core body is parallel with top panel and lower panel, in an oven
80 DEG C of drying, are then charged into being welded in high temperature brazing stove, and slow cooling to room temperature is come out of the stove and obtains ripple square tube core after the completion of welding
Interlayer body plate.
The soldering:Vacuum degree control is 10-2More than Pa, 830-900 DEG C of insulation is risen to 1 DEG C/min speed from room temperature
10min, then furnace cooling.
Embodiment three:
1) 304 stainless steel straight square tubes are made semicircle ripple square tube by regulation requirement first by bending machine;
2) 304 stainless steel materials of smooth mistake are cut into top panel and lower panel using line cutting technology;
3) go to degrease and rusty stain after cleaning top panel, lower panel and ripple square tube, be put into dry for standby in dryer;
4) ripple square tube is assembled to be formed ripple square tube core body in parallel to each other by 2 times of tube wall spacing and 180 ° of phase differences,
And fix standby with frock;
5) by the face uniform application Ni-Zr-P solder pastes that ripple square tube core body is parallel with top panel and lower panel, drying
80 DEG C of drying, are then charged into being welded in high temperature brazing stove in case, and slow cooling is come out of the stove to room temperature and obtains ripple side after the completion of welding
Tube core interlayer body plate.
The soldering:Vacuum degree control is 10-3More than Pa, 1000-1200 DEG C of insulation is risen to 1 DEG C/min speed from room temperature
1 hour, then furnace cooling.
Be according to thin plate stable theory, the characteristics of ripple rhs-structure by straight tube compression while be divided into many it is sub- while, each
Sub- side is constrained by the prism of stabilization, the stability of thin plate is greatly strengthen, so as to improve the utilization rate of core material.Based on
Upper theory, the relatively straight tube core body of ripple rhs-structure has stronger specific strength.
Above content is only explanation technological thought of the invention, it is impossible to limit protection scope of the present invention with this, every to press
According to technological thought proposed by the present invention, any change done on the basis of technical scheme each falls within claims of the present invention
Protection domain within.