A kind of wavy channel core body sandwich and preparation method thereof
【Technical field】
The invention belongs to sandwich technical field, and in particular to a kind of wavy channel core body sandwich and its system
Preparation Method, particularly a kind of two-dimensional lattice core body sandwich material 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 novel multifunction material.Such material has high porosity feature, and its 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 structure (such as ripple
Structure, honeycomb etc.) and three-dimensional truss structure (such as pyramid structure, X-type structure).
At present, two-dimensional lattice structure material due to its manufacturing process it is simple, the features such as excellent in mechanical performance, in space flight boat
It is widely used in sky, ship, automobile, machinery and civil engineering.With the development that integration of equipments and multifunction are designed, tool
The material for having multi-functional characteristic is increasingly favored by engineering circles, and traditional two-dimensional lattice material mechanical performance is excellent, such as honeybee
The mechanical properties such as nest structural core, its compression, bending are protruded, but because the core body is made up of cross one another web, in core body
Portion's fluids free flow moves hindered, it is impossible to realize active heat removal function.In addition for big specification honeycomb sandwich construction according to
Laser welding, can form intersection welding bead on panel, reduce the mechanical property of panel.Though traditional I core bodies have perforate
Passage, but its core is prone to buckling failure, therefore its structure is needed to be improved.
【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 takes into account mechanics
The multi-functional sandwich of performance and active cooling function, is had by replacing I core bodies with wavy channel core body
There are more excellent mechanics, the wavy channel core body sandwich of heat transfer combination property.
The present invention uses following technical scheme:
A kind of preparation method of wavy channel core body sandwich, comprises the following steps:
S1, smooth sheet material is made corrugated plating using punching press or rolling techniques;
S2, the corrugated plating is cut into ripple lath;
S3, by the plate cutting of smooth mistake into top panel and lower panel;
After S4, the greasy dirt and rusty stain of top panel, lower panel and ripple lath described in removal step S2 and S3, dryer is put into
Interior dry for standby;
S5, the ripple lath is parallel to each other is assembled into wavy channel core body, and fixation is standby;
S6, wavy channel core body described in step S5 and top panel described in step S4, lower panel connection are made wavy channel
Core body sandwich plate.
Further, in step S5, the phase difference of the ripple lathIt is 0 °~180 °.
Further, in step S5, the equivalent neutral interplanar distance of the ripple lath is thick 10~100 times of ripple lath
Degree.
Further, in step S5, the equivalent neutral surface of the adjacent ripple lath be arranged in parallel.
Further, in the step S6, it is attached using soldering, Laser Welding or epoxy glue and is made the passage core body
Sandwich plate.
Further, the soldering keeps vacuum 10-2~10-3Pa, 550 are risen to from room temperature with 1 DEG C/min speed~
1200 DEG C, it is incubated 10min~60min, slow cooling to room temperature.
Wavy channel core body sandwich prepared by a kind of wavy channel core body sandwich preparation method, including top panel
And lower panel, wavy channel core body is provided between the top panel and lower panel, the wavy channel core body is by ripple lath
Be parallel to each other composition.
Further, the bellows-shaped of the ripple lath includes sine bellows, circular arc ripple, triangle ripple, trapezoidal wave
Line and rectangle ripple.
Further, the top panel, lower panel and wavy channel core body by carbon steel, stainless steel, fine aluminium, aluminium alloy,
Any one in magnesium alloy, titanium alloy or composite is prepared from.
Further, the top panel is different with the thickness of lower panel.
Compared with prior art, the present invention at least has the advantages that:
The present invention provides a kind of wavy channel core body sandwich preparation method, using punching press or rolling techniques by smooth mistake
Sheet material be respectively prepared ripple lath, top panel and lower panel, by after drying and processing, ripple lath being be arranged in parallel and being assembled into
Wavy channel core body and upper and lower panel are made wavy channel core body sandwich plate together, and I types are replaced by using wavy channel core body
Core body and obtain the wavy channel core body sandwich with multi-functional characteristic, the structure on the basis of I type structures further
The mechanical characteristics such as its specific strength, specific stiffness are improved, and makes it be that the leading passage flowing coefficient of heat conduction strengthens in transition flow
More than 50%, have excellent active cooling function while making it have the mechanical property close with honeycomb sandwich construction concurrently.
Further, the flow regime of different fluid can be controlled by changing ripple lath phase difference, is optimal stream
Dynamic heat transfer coefficient.Can change wavy channel core body relative density by adjusting equivalent neutral interplanar distance, knot is improved to greatest extent
The specific strength and specific stiffness of structure.
The present invention also provides a kind of wavy channel core body sandwich, and line passage core body sandwich is by top panel, ripple
Passage core body and lower panel are constituted, and are replaced I core bodies with wavy channel core body and are obtained the two-dimensional lattice with multi-functional characteristic
Core body sandwich, the structure improves more than 20% in aspect of performances such as specific strength, specific stiffness compared with I types structure, and makes it in mistake
It is leading passage flowing coefficient of heat conduction enhancing more than 50% to cross stream, makes it have the mechanical property close with honeycomb sandwich construction
Excellent active cooling function is had concurrently while energy.
Further, according to different application occasion and processing conditions, bellows-shaped can select sine bellows, arc-wave
Line, triangle ripple, trapezoidal ripple or rectangle ripple.
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 wavy channel sandwich structure can further be improved.
In sum, sandwich of the present invention has high specific strength, high specific stiffness and excellent thermal conduction characteristic, Ke Yiying
For space flight and aviation, ship, automobile, machinery and field of civil engineering, especially have in the load-carrying construction of heat management requirement wide
Wealthy application prospect.
Below by drawings and Examples, technical scheme is described in further detail.
【Brief description of the drawings】
Fig. 1 is the structural representation of wavy channel core body sandwich of the present invention;
Fig. 2 is the bellows-shaped schematic diagram of corrugated plating of the present invention;
Fig. 3 is compression experiment result figure of the present invention;
Fig. 4 is structural behaviour comparison diagram of the present invention.
Wherein:1. top panel;2. ripple lath;3. wavy channel core body;4. lower panel;5 equivalent neutral surfaces.
【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, a kind of wavy channel core body sandwich of the invention, including top panel 1 and lower panel
4, it is provided with wavy channel core body 3 between top panel 1 and lower panel 4, wavy channel core body 3 is parallel to each other group by ripple lath 2
Into.Replace I core bodies with wavy channel core body and obtain the two-dimensional lattice core body sandwich with multi-functional characteristic, the structure
More than 20% is improved compared with I types structure in aspect of performances such as specific strength, specific stiffness, and makes it be that leading passage flows in transition flow
Coefficient of heat conduction enhancing more than 50%, has excellent master concurrently while making it have the mechanical property close with honeycomb sandwich construction
Dynamic refrigerating function.
Wherein, the bellows-shaped of ripple lath 2 includes sine bellows, circular arc ripple, triangle ripple, trapezoidal ripple or rectangle
Ripple.Top panel 1, lower panel 4 and wavy channel core body 3 by carbon steel, stainless steel, fine aluminium, aluminium alloy, magnesium alloy, titanium alloy or
Composite is prepared from.
The thickness of top panel 1 and lower panel 4 can be with identical, it is also possible to differs, and preferred thickness is different.
A kind of preparation method of wavy channel core body sandwich of the present invention, comprises the following steps:
S1, smooth sheet material is made corrugated plating using punching press or rolling techniques;
S2, the corrugated plating is cut into ripple lath;
S3, by the plate cutting of smooth mistake into top panel and lower panel;
After S4, the greasy dirt and rusty stain of top panel, lower panel and ripple lath described in removal step S2 and S3, dryer is put into
Interior dry for standby;
S5, the ripple lath is parallel to each other is assembled into wavy channel core body, and fixation is standby;
The phase difference of the ripple lathIt it is 0 °~180 °, the equivalent neutral interplanar distance of the ripple lath is corrugated plating
10~100 times of thick degree of bar.
S6, wavy channel core body described in step S5 and top panel described in step S4, lower panel connection are made wavy channel
Core body sandwich plate.
The equivalent neutral surface of the adjacent ripple lath is parallel to each other, and is attached using soldering, Laser Welding or epoxy glue
The passage core body sandwich plate is made, soldering keeps vacuum 10-2~10-3Pa, 550 are risen to from room temperature with 1 DEG C/min speed~
1200 DEG C, it is incubated 10min~60min, slow cooling to room temperature.
Embodiment 1
1) titanium alloy plate of smooth mistake is made the corrugated plating of sinusoidal waveform of stamping technology first;
2) corrugated plating and then using line cutting technology is cut into ripple lath 2 on request;
3) titanium alloy plate of smooth mistake is cut into plate 1 and lower panel 4 above equal thickness using line cutting technology;
4) top panel 1, lower panel 4 and ripple lath 2 are put into supersonic wave cleaning machine and are cleaned, be put into 40~50 DEG C of baking
Dry for standby in case;
5) ripple lath 2 is assembled to form ripple in parallel to each other by the spacing and 90 ° of phase differences of 10 times of web thickness of rule
Passage core body 3, and fix standby with frock;
6) by the Ti base solder pastes that uniform application at wavy channel core body 3 and the link position of upper and lower panel 4 is commercially available, in baking oven
In 80 DEG C drying, be then charged into being welded in high temperature brazing stove, slow cooling is come out of the stove to room temperature and obtains wavy channel after the completion of welding
Core body sandwich 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 2:
1) 1060 pure aluminum plates of smooth mistake are made the corrugated plating of triangle of rolling techniques first;
2) corrugated plating and then using line cutting technology is cut into ripple lath 2 on request;
3) 1060 pure aluminum plates of smooth mistake are cut into plate 1 and lower panel 4 above equal thickness using line cutting technology;
4) top panel 1, lower panel 4 and ripple lath 2 are gone to degrease and rusty stain using metal cleaner cleaning, is put into 40
~50 DEG C of drying in oven is standby;
5) ripple lath 2 is assembled to form ripple in parallel to each other by the spacing and 180 ° of phase differences of 20 times of web thickness of rule
Passage core body 3, and fix standby with frock;
6) commercially available aluminium soldering cream will be uniformly coated at wavy channel core body 3 and the link position of upper and lower panel 4, in an oven
40~50 DEG C drying, be then charged into being welded in high temperature brazing stove, after the completion of welding slow cooling to room temperature come out of the stove obtain ripple lead to
Road core body 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, then furnace cooling.
Embodiment 3:
1) stainless steel plate of smooth mistake is made trapezoidal corrugated plating using stamping technology first;
2) corrugated plating and then using line cutting technology is cut into ripple lath 2 on request;
3) stainless steel plate of smooth mistake is cut into plate 1 and lower panel 4 above equal thickness using line cutting technology;
4) top panel 1, lower panel 4 and ripple lath 2 are gone to degrease and rusty stain using metal cleaner cleaning, is put into 40
~50 DEG C of drying in oven is standby;
5) ripple lath 2 is assembled in parallel to each other by the spacing and 0 ° of phase difference of 50 times of web thickness of rule and forms ripple and lead to
Road core body 3, and fix standby with frock;
6) plate 1 is covered in the top of wavy channel core body 3 above handling well, after adjustment position, laser is determined by test weld
Device position and height, according to bellows-shaped work out laser walking program, according to panel and core thickness determine laser power and
Speed of welding.The order that core plate is welded in welding process is alternately welded to both sides from centre.
After the completion of whole face welding, panel is spun upside down after fixing, lower panel 4 is covered in core plate, repeat to grasp above
Make, complete the welding of lower panel 4 and core body, finally give wavy channel core body sandwich plate.
Embodiment 4:
1) stainless steel plate of smooth mistake is made trapezoidal corrugated plating using stamping technology first;
2) corrugated plating and then using line cutting technology is cut into ripple lath 2 on request;
3) stainless steel plate of smooth mistake is cut into plate 1 and lower panel 4 above equal thickness using line cutting technology;
4) top panel 1, lower panel 4 and ripple lath 2 are gone to degrease and rusty stain using metal cleaner cleaning, is put into 40
~50 DEG C of drying in oven is standby;
5) ripple lath 2 is assembled to form ripple in parallel to each other by the spacing and 0 ° of phase difference of 100 times of web thickness of rule
Passage core body 3, and fix standby with frock;
6) plate 1 is covered in the top of wavy channel core body 3 above handling well, after adjustment position, laser is determined by test weld
Device position and height, according to bellows-shaped work out laser walking program, according to panel and core thickness determine laser power and
Speed of welding, the order that core plate is welded in welding process is alternately welded to both sides from centre.
After the completion of whole face welding, panel is spun upside down after fixing, lower panel 4 is covered in core plate, repeat to grasp above
Make, complete the welding of lower panel 4 and core body, finally give wavy channel core body sandwich plate.
Refer to shown in Fig. 3, face external compression performance and the existing lattice core structure of wavy channel core body sandwich
Compression performance is similar.Whole compression process is divided into 3 stages, 1) linear elasticity compression process, with the increase of compressive strain, compression
Linear increase;2) nonlinear elasticity sexual stage, the stage since 2 points of diagram, terminates to No. 3 points, and compression is with compressive strain
Increase and non-linear growth;3) softening stress-displacement stage, by after peak point 3, compression increases and reduces with compressive strain.This experiment
The structure exemplar of different relative densities in 4 is chosen, it can be seen that compression peak value and equivalent elastic modulus are with relative density
Increase and increase.
Refer to shown in Fig. 4, draw out the relation of different type core outside compression performance and relative density, horizontal seat
Mark is expressed as the relative density of structural core, and ordinate is expressed as the dimensionless intensity level of structural strength, it can be determined that:Relative
Density identical situation, the face external compression performance of wavy channel core body sandwich is considerably beyond traditional ripple struction.
Outside compression performance in Fig. 4 represents that the parameter shows structural matrix closer to 1 with nondimensional compressive strength
The utilization rate of material is higher, and material efficiency is higher.As can be seen from the figure honeycomb core body relative density be located at 0.03~
There is stock utilization very high in 0.1 this interval range.In the case that relative density is less than 0.03, wavy channel core body
Dimensionless maximum intensity, stock utilization is maximum.In addition it can be seen that the outside compression performance of wavy channel core body
It is far longer than traditional ripple core.Therefore, in low density area, structure of the present invention has excellent specific strength.Above content
Only illustrate technological thought of the invention, it is impossible to which protection scope of the present invention is limited with this, it is every according to skill proposed by the present invention
Art thought, any change done on the basis of technical scheme, each falls within the protection domain of claims of the present invention.