CN107263954A - The hollow dot matrix honeycomb of all-metal mixes sandwich structure and its interlocking preparation method - Google Patents

Abstract

The all-metal hollow lattice-honeycomb hybrid sandwich structure and its interlocking preparation method relate to a sandwich structure and its interlocking preparation method. The invention aims to enhance the energy absorption capacity of the metal honeycomb and improve the shear strength. In the present invention, the upper panel and the lower panel are arranged in parallel up and down, and the square honeycomb interlocking pieces are interlocked and arranged between the upper and lower panels after being assembled, and a plurality of inclined circular tubes with narrow and long notches are interlocked and connected to the above-mentioned assembly body one by one. , forming a hollow pyramid-shaped lattice-square honeycomb hybrid core, which is then combined with the upper and lower panels to form a sandwich structure. The preparation method is as follows: Step 1: Processing core components and panels; Step 2: Interlocking and assembling this type of lattice-honeycomb hybrid core, and then combining with upper and lower panels to form a sandwich structure assembly; Step 3: Through vacuum welding The process connection is an integral structure. As an efficient energy-absorbing protection device, the invention is used in the fields of aerospace, ships and oceans, underwater anti-explosion, traffic construction and the like.

Description

All-metal hollow lattice-honeycomb hybrid sandwich structure and its interlocking preparation method

technical field

The invention relates to a sandwich structure and a preparation method thereof, in particular to an all-metal hollow lattice-honeycomb hybrid sandwich structure and an interlocking preparation method thereof, which are suitable for aerospace, ships and oceans, underwater explosion resistance, and traffic construction and other fields.

Background technique

In recent years, more and more high-performance energy-absorbing materials (structures) have been the research focus. Porous structures are widely used as high-performance energy-absorbing media because of their light weight and high-efficiency energy absorption. They are usually used as core materials of sandwich beams to absorb external impact energy and explosion energy. Porous structures include random foams and periodic porous structures, which include structural materials such as honeycombs and microscale truss lattices.

As a two-dimensional ordered ultra-light porous structure, honeycomb is the most mature manufacturing technology and the most widely used lightweight structure in the world today. Its base material can be any kind of polymer, metal, ceramic or composite material. They are mechanically anisotropic materials with generally high strength and stiffness in the perpendicular out-of-plane direction. It can be seen that the honeycomb not only has the advantage of light weight but also has excellent mechanical properties. Especially for aluminum honeycomb, scholars have conducted a large number of experiments and theoretical studies, and found that its compression response in the thickness direction has a long plateau stress with little fluctuation, and it is a relatively efficient energy-absorbing material. This is especially true in dense areas. But the honeycomb structure is not the optimal energy-absorbing structure in the high relative density area. In addition, most of the experimental studies on the shear performance of honeycomb structures are limited to structures with a relative density below 8%, and the catastrophic failure of face-core debonding has been observed in shear tests of higher relative density cores. form.

As a lattice truss material that may replace honeycomb in the future, its structural strength is equivalent to that of honeycomb, and its high internal porosity makes it easier to integrate multifunctional properties. However, the post-buckling residual strength of the solid truss lattice structure is low, so it is not a good energy-absorbing material. The emergence of the hollow truss lattice makes up for this deficiency. Because of its high quadratic area moment, it can significantly alleviate the post-buckling softening phenomenon common in low-density truss structures, and make the core rod have a high post-buckling residual strength, so Has excellent specific energy absorption characteristics. Moreover, the hollow truss lattice is easy to carry out collaborative optimization of multiple geometric parameters to maximize the structural bearing capacity.

It is well known that the strength of materials under impact loads is impact rate dependent, and that inertial stabilization effects can enhance the energy absorption capacity of structures. Therefore, it is very necessary to obtain basic quasi-static energy-absorbing performance data of materials. As a new type of topological structure, the hollow pyramid lattice truss has both light-weight and high-strength structural characteristics and excellent energy absorption capacity, and has attracted more and more attention from researchers at home and abroad. Under the action of flat compressive load, the energy absorption capacity per unit mass of the hollow pyramid lattice truss structure is obviously higher than that of other core structures. However, the energy absorption capacity per unit volume of the hollow pyramid lattice truss structure is comparable to other core structures, and the energy absorption effect is inferior to that of the honeycomb structure under low impact loads. However, under the action of high impact load, compared with other topological structures, the energy absorption capacity per unit mass and unit volume energy absorption capacity of the hollow pyramid lattice truss structure are optimal. Also, under shear loads, the energy absorption level of the hollow pyramid lattice structure is much higher than that of porous materials such as open-cell metal foams.

Contents of the invention

The purpose of the present invention is to improve the residual strength of the existing metal honeycomb sandwich structure against out-of-plane compression deformation and reduce its fluctuation, thereby enhancing the energy absorption capacity of the original honeycomb structure and filling the blank in the Ashby material performance selection diagram ;Enhance the surface-core interface connection strength during transverse shearing, so as to give full play to the bearing capacity of the high relative density core. Furthermore, an all-metal hollow lattice-honeycomb hybrid sandwich structure and an interlocking preparation method thereof are provided.

The technical solution of the present invention is: an all-metal hollow lattice-honeycomb hybrid sandwich structure includes an upper panel and a lower panel, the upper panel and the lower panel are arranged in parallel up and down, and it also includes a square honeycomb interlocking composition piece and a plurality of strips Angled round pipe with notch.

Further, the square honeycomb interlocking composition piece includes a plurality of first locking pieces and a plurality of second locking pieces, the plurality of first locking pieces are arranged in parallel at equal intervals, and the plurality of second locking pieces are vertically spaced and inserted in multiple on the first cleat.

Further, the upper parts of the plurality of first locking pieces and the lower parts of the plurality of second locking pieces are provided with inserting interlocking grooves at equal intervals.

Further, the upper parts of the plurality of first locking pieces and the plurality of second locking pieces are located on both sides of the inserting interlocking grooves and are symmetrically inclined to open two inclined circular tube interlocking grooves.

Further, the lower part of the inclined circular tube with the long and narrow notches is provided with grid interlocking grooves.

Further, the inclined circular tube with the long and narrow notches is interlocked and plugged in the intersecting intersection of the multiple first locking pieces and the multiple second locking pieces at an angle of 0°-60° to the straight line, A complete all-metal hollow pyramid truss lattice-square honeycomb hybrid core is formed.

Further, the material of the inclined circular tube with the long and narrow notches is the same as that of the first locking piece and the second locking piece.

Furthermore, the interlocking preparation method of the circular tube reinforced honeycomb sandwich device includes the following interlocking steps:

Step 1: Process the inclined round tube with long and narrow slots, the first locking piece and the second locking piece:

Batch processing of inclined round pipes with long and narrow notches on the jig tooling used for preparing inclined round pipes with notches; batch cutting and processing of first locking pieces and second locking pieces by wire electric discharge cutting.

Step 2: Installation of square honeycomb interlocking components:

A plurality of first locking pieces are arranged in parallel at equal intervals, and a plurality of second locking pieces are vertically inserted into the insertion and interlocking grooves of the plurality of first locking pieces to form a square honeycomb interlocking assembly, and a square honeycomb interlocking assembly The four top corners of the component are also interlocked by multiple first locking pieces and multiple second locking pieces;

Step 3: The inclined circular tube interlock with narrow and long slots is installed on the square honeycomb interlock component to form a hollow pyramid-shaped truss lattice-square honeycomb hybrid core:

Inserting the inclined round tube with narrow and long notches processed in step 1 into the two inclined round tube interlocking grooves on both sides of the inserting interlocking grooves of the plurality of first locking pieces and the plurality of second locking pieces;

Step 4: Prepare an all-metal hollow pyramid lattice-square honeycomb hybrid sandwich structure:

The upper panel and the lower panel are respectively contacted and aligned to cover the hollow pyramid-shaped truss lattice in step 3-the upper and lower ends of the square honeycomb hybrid core, and are connected as a whole by vacuum brazing. So far, the all-metal hollow pyramid-shaped lattice- Preparation of square honeycomb hybrid sandwich structure.

Further, the jig tooling used in step 1 for preparing the inclined round pipe with the slit notch includes an angle positioning mold, a fixture body, two unidirectional corrugated blocks, multiple bidirectional corrugated blocks, and multiple stoppers Screws, one end of the angle positioning die is an inclined end face, the fixture body is a rectangular frame, the fixture body is installed on the inclined end face of the angle positioning die, two unidirectional corrugated blocks are relatively arranged in the rectangular frame, and multiple bidirectional corrugated blocks Installed between two unidirectional corrugated blocks, multiple circular tubes to be processed are clamped between two adjacent bidirectional corrugated blocks and clamped between a unidirectional corrugated block and a unidirectional corrugated block Between one adjacent two-way corrugated block, a plurality of limit screws press the limit and align and compress the upper end faces of the two one-way corrugated blocks and multiple two-way corrugated blocks, and the A plurality of circular tubes to be processed are arranged and fixed.

Further, in the step 3, the interlocking intersecting intersections of the inclined circular tube with the narrow and long notch and the plurality of first locking pieces and the plurality of second locking pieces are embedded in a straight line at an angle of 0°-60°. Lock socket.

Compared with the prior art, the present invention has the following effects: using an ingenious joint interlocking assembly method of "slat-slat" and "round tube and slat", and through a mixed structure, a combination of A new high-performance porous metal material with high strength and excellent energy-absorbing properties fills a gap in Ashby's material performance selection map, providing a reliable lightweight structure for high-speed impact protection applications. In addition, the structure has a strong face-core interface connection strength, which can give full play to the bearing capacity of the high relative density core and expand the application range of metal honeycomb materials.

One, the device of the present invention has the following technical effects:

1. The present invention adopts the hybrid method of hollow pyramid truss lattice and square honeycomb, finds a new high-performance porous metal material with high strength and excellent energy absorption characteristics, and fills the blank in the Ashby material performance selection diagram , providing a reliable lightweight construction for high speed impact protection applications.

2. Since the present invention adopts the hollow pyramid-shaped truss lattice-square honeycomb hybrid core, the cross-section at the end of the circular tube increases the face-core interface area of the original honeycomb, thereby effectively improving the connection strength of the face-core. No surface core desoldering phenomenon was observed in the transverse shear test, which fundamentally improved the shear strength of this type of structure.

3. The core material of the present invention has excellent comprehensive mechanical properties, and its strength and energy absorption effect exceed the sum of the properties of a single square honeycomb structure and a single hollow pyramid lattice structure.

4. The present invention also performs interlocking at the four corners of the square honeycomb interlocking assembly of the hollow pyramid truss lattice-square honeycomb hybrid core through a plurality of first locking pieces 4 and a plurality of second locking pieces 5, The function of boundary reinforcement is realized, the boundary effects of the four corners are eliminated, and the comprehensive mechanical properties of the structure are improved.

5. The present invention is especially suitable for the fields of energy absorption and protection of high impact loads such as underwater explosions and automobile anti-collision.

Two, method of the present invention has following technical effect:

1. The present invention uses an ingenious joint interlocking method of "slat-slat" and "round tube and slat" for structural assembly, and the hybrid core material or the clip with the core material is vacuum brazed The core board structure is connected in one piece. The preparation process is simple, the cost is low, and the welded parts have few geometric defects.

2. The method of the present invention is only applicable to the preparation of metallic circular tube-honeycomb hybrid structures, especially applicable to mainstream alloys with mature connection techniques such as stainless steel, aluminum alloy or titanium alloy.

3. The method of the present invention has good repeatability and stable technology, and is suitable for test verification after geometric optimization of such structures.

Description of drawings

Fig. 1 is a schematic view of the overall structure of the present invention; Fig. 2 is a front view of Fig. 1; Fig. 3 is a top view of Fig. 1; Fig. 4 is a schematic view of the overall structure after removing the upper panel and the lower panel; Fig. 5 is after installation of Fig. 4 Figure 6 is a schematic diagram of the structure of Figure 5 after the round tube is removed; Figure 7 is a structural schematic diagram of the second locking piece with five insertion interlocking grooves and two pairs of inclined round tube interlocking grooves; Figure 8 is Schematic diagram of the structure of the first locking piece with three insertion locking grooves and a pair of inclined round tube insertion locking grooves; Schematic diagram of the structure of the locking piece; Figure 10 is a schematic structural diagram of the second locking piece with a plug-in locking groove installed at the four corners; Figure 11 is a structure diagram with three plug-in locking grooves and a pair of inclined round tubes Schematic diagram of the structure of the second locking piece of the lock groove; Figure 12 is a schematic structural diagram of an inclined circular tube with a narrow slot; Figure 13 is a top view of Figure 12; Figure 14 is a cross-sectional view of Figure 13 at C-C; Left view; Figure 16 is a schematic diagram of the overall structure of the jig tooling used to prepare inclined round pipes with notches; Figure 17 is the front view of Figure 16; Figure 18 is the top view of Figure 16; Figure 19 is the left side of Figure 16 Views; Fig. 20 is an axonometric view of the angle positioning mold; Fig. 21 is a front view of Fig. 20; Fig. 22 is a sectional view along D-D of Fig. 21; Fig. 23 is an axonometric view of the fixture body; Fig. 24 is a one-way corrugated block Figure 25 is an axonometric view of a two-way corrugated block; Figure 26 is an axonometric view of a fixed-angle briquetting block;

detailed description

Specific embodiment 1: This embodiment is described in conjunction with Fig. 1 to Fig. 15. An all-metal hollow pyramid lattice-square honeycomb hybrid sandwich panel device in this embodiment includes an upper panel 1 and a lower panel 2, and an upper panel 1 and a lower panel 2. The lower panel 2 is arranged in parallel up and down, and it also includes a square honeycomb interlocking assembly and a plurality of inclined round tubes 3 with narrow slots. The square honeycomb interlocking assembly is installed between the upper panel 1 and the lower panel 2, and multiple slots The inclined round pipe 3 at the mouth is obliquely inserted and locked in the inclined round pipe interlocking groove of the square honeycomb interlocking assembly.

On the basis of retaining the complete square honeycomb structure, the cutting-interlocking preparation process of the present invention skillfully kneads the hollow pyramid lattice structure and the square honeycomb structure together by grooving the round tube to form a new The hybrid structure form - hollow pyramid truss lattice - square honeycomb hybrid structure, and its corresponding sandwich structure is called all metal hollow pyramid lattice - square honeycomb hybrid sandwich structure.

Specific Embodiment 2: This embodiment is described with reference to FIGS. 1 to 11. The square honeycomb interlock assembly of this embodiment includes multiple first locking pieces 4, multiple second locking pieces 5, multiple first locking pieces 4, etc. The intervals are arranged in parallel, and the plurality of second locking pieces 5 are arranged in parallel at equal intervals and interlocked and inserted on the plurality of first locking pieces 4 one by one. With such arrangement, it is convenient to form a square honeycomb interlocking component, and the assembly process is simple. Other compositions and connections are the same as in the first embodiment.

Embodiment 3: This embodiment is described with reference to FIG. 1 to FIG. 11 . In this embodiment, the upper parts of the plurality of first locking pieces 4 and the lower parts of the plurality of second locking pieces 5 are provided with inserting interlocking grooves 6 at equal intervals. Such an arrangement facilitates interlocking and plugging of multiple first locking pieces 4 and multiple second locking pieces 5 , and accurate installation and positioning. Other compositions and connections are the same as those in the second embodiment.

Specific Embodiment 4: This embodiment is described with reference to Fig. 1 to Fig. 11. In this embodiment, the upper parts of the plurality of first locking pieces 4 and the plurality of second locking pieces 5 are symmetrical on both sides of the inserting and locking grooves 6. Two oblique circular pipe interlocking grooves 7 are provided obliquely. Such arrangement facilitates the insertion and installation of a plurality of inclined circular tubes 3 with narrow and long notches. Other compositions and connections are the same as those in the third embodiment.

Embodiment 5: This embodiment is described with reference to FIG. 1 to FIG. 6 and FIG. 12 . In this embodiment, the lower part of the inclined circular tube 3 with a narrow notch is provided with a honeycomb strip interlocking groove 8 . Such arrangement makes it easy for the inclined circular tube 3 with a narrow notch to be connected to multiple first locking plates 4 and multiple second locking plates one by one through the inclined circular tube interlocking groove 7 on the first locking plate 4 and the second locking plate 5. Lock piece 5 on. Other compositions and connections are the same as in Embodiment 4.

Specific Embodiment 6: This embodiment is described in conjunction with Fig. 1 to Fig. 6. The inclined circular tube 3 with a narrow and long notch of this embodiment is interlocked with a plurality of first locking pieces 4 and a plurality of second locking pieces 5. The intersection is interlocked and plugged in the direction of the straight line at an angle of 0°-60° to form a complete all-metal hollow pyramid truss lattice-square honeycomb hybrid core. In such a setting, in actual use, the inclination angle of the inclined circular tube 3 with the narrow slot is usually set at 45°, so as to optimize the shear strength of the core. Other compositions and connections are the same as those in Embodiment 5.

Embodiment 7: This embodiment is described with reference to FIG. 1 to FIG. 6 . The material of the inclined circular tube 3 with a narrow notch in this embodiment is the same as that of the first locking piece 4 and the second locking piece 5 .

Embodiment 8: This embodiment is described in conjunction with Fig. 1 to Fig. 15. The interlocking preparation method of the all-metal hollow lattice-honeycomb hybrid sandwich structure in this embodiment includes the following preparation process:

Step 1: Process the inclined round tube 3 with a long and narrow notch, the first locking piece 4 and the second locking piece 5:

Batch processing of inclined round pipes 3 with long and narrow notches on the jig tooling for preparing inclined round pipes with notches; batch cutting and processing of first locking pieces 4 and second locking pieces 5 by wire electric discharge cutting.

Step 2: Installation of square honeycomb interlocking components:

A plurality of first locking pieces 4 are arranged in parallel at equal intervals, and a plurality of second locking pieces 5 are arranged in parallel at equal intervals, and are interlocked and inserted on the plurality of first locking pieces 4 one by one by inserting and interlocking grooves 6 to form a square honeycomb For the interlocking component, the four corners of the square honeycomb interlocking component are also interlocked by two first locking pieces 4 and two second locking pieces 5 .

Step 3: Install the inclined circular tube 3 interlock with narrow and long slots on the square honeycomb interlock component to form a hollow pyramid-shaped truss lattice-square honeycomb hybrid core:

Insert the inclined round tubes 3 with narrow and long notches processed in step one one by one into the two inclined round tubes on both sides of the inserting and locking grooves 6 of the plurality of first locking pieces 4 and the plurality of second locking pieces 5 . There are 7 lock slots.

Step 4: Prepare an all-metal hollow pyramid lattice-square honeycomb hybrid sandwich structure:

The upper panel 1 and the lower panel 2 are respectively contacted and aligned with the upper and lower ends of the hollow pyramid truss lattice-square honeycomb hybrid core covered in step 3, and connected as a whole by vacuum brazing, so far, the all-metal hollow pyramid point is completed. Fabrication of array-square honeycomb hybrid sandwich structures.

Specific Embodiment Nine: This embodiment is described in conjunction with Fig. 16 to Fig. 26. This embodiment uses an interlocking preparation method of an all-metal hollow lattice-honeycomb hybrid sandwich structure. The jig tooling for the inclined round pipe includes angle positioning die A-1, fixture body A-2, two unidirectional corrugated blocks A-3, multiple bidirectional corrugated blocks A-4 and multiple limit screws A- 5. One end of the angle positioning die A-1 is an inclined end face, the fixture body A-2 is a rectangular frame, the fixture body A-2 is installed on the inclined end face of the angle positioning die A-1, two unidirectional corrugated blocks A -3 is relatively arranged in a rectangular frame, multiple two-way corrugated blocks A-4 are installed between two one-way corrugated blocks A-3, and multiple circular tubes to be processed are clamped between two adjacent multiple two-way corrugated blocks A-3 A plurality of limit screws A -5 Press the limit and align and press the upper end faces of the two one-way corrugated blocks A-3 and multiple two-way corrugated blocks A-4 and arrange multiple round tubes to be processed by lateral limit fixed.

This embodiment is suitable for processing inclined round pipes with any angle and various slotting methods; it can be cut and processed in batches, and the processing accuracy is strictly guaranteed (the inclination of the round pipe, the centering of the slot position and the slotting depth, etc.); this implementation The parts (empty tubes with grooves) prepared by this method can also be used for interlocking assembly to prepare hollow lattice truss porous structures, such as hollow pyramid lattice truss sandwich structures.

The plurality of round tubes to be processed in this embodiment are arranged in a rectangular array after being installed on the jig, and the diameters of the round tubes to be processed in each row are the same. The processing is applicable to a wide range.

In the present invention, a plurality of round pipes to be processed are clamped on the one-way corrugated block A-3 and a plurality of two-way corrugated blocks A-4, and the one-way concave of the round pipe to be processed on the one-way corrugated block A-3 Four-line positioning is realized between the groove and the two-way grooves on the multiple two-way corrugated blocks A-4. The four-line positioning clamping method can effectively ensure that the round tube to be processed is firmly clamped during the processing, and the cutting process The round tubes to be processed will not move in series, thus ensuring the accuracy of the round tubes to be processed and the centering of the center notches of all the round tubes to be processed.

The jig tooling of the invention has good versatility and interchangeability. Specifically, in the actual use of this application, according to the inclination angle of the target round pipe part, the appropriate angle positioning die A-1 can be selected, and other components do not need to be changed, and it is suitable for special processing such as wire electric discharge cutting or laser cutting. method.

The jig of the present invention has a simple structure, and after each clamping, batch production and processing can be realized, and the number of parts for a single production and processing can reach hundreds, and the interchangeability of each batch of parts is excellent.

Specific Embodiment Ten: This embodiment is described in conjunction with Fig. 16 to Fig. 19 and Fig. 23. This embodiment also includes a fixed-angle pressing block A-7, which is installed in the fixture body A-2, and fixed-angle pressing block A-7 The angle pressing block A-7 is placed on the upper end surfaces of two unidirectional corrugated blocks A-3 and multiple bidirectional corrugated blocks A-4, and multiple limit screws A-5 connect the two sides through the fixed angle pressing block A-7. The upper and lower bottom surfaces of a single unidirectional corrugated block A-3 and multiple bidirectional corrugated blocks A-4 are aligned and compressed. With such a setting, it is convenient to provide a unified top block for the alignment and compression of the upper and lower bottom surfaces of two unidirectional corrugated blocks A-3 and multiple bidirectional corrugated blocks A-4, and strictly guarantee the accuracy of the inclination angle of the target round pipe parts with consistency. Other compositions and connections are the same as those in Embodiment 9.

Specific Embodiment Eleven: This embodiment is described with reference to Fig. 16 to Fig. 19. This embodiment also includes a lateral limiting block A-8, which is also installed in the clamp body A-2, and The lateral limit block A-8 is attached to the outer surface of the unidirectional corrugated block body A-3 on the right side, and a plurality of limit screws A-5 pass the unidirectional corrugated block A-8 through the lateral limit block A-8. The outer surface of the corrugated block A-3 is slightly tightened, so that each row of round tubes to be processed in the fixture body A-2 can be fixed in rows. Such setting, in actual use, not only realizes the precise four-line positioning of the round tube to be processed by cooperating with the fixed-angle pressing block A-7, but also effectively avoids the possible plasticity of the round tube to be processed during the clamping process. out of shape. Other compositions and connections are the same as those in Embodiment 10.

Embodiment 12: This embodiment is described with reference to FIG. 16 to FIG. 20 . The angle between the inclined end surface of the angle positioning die A-1 and the horizontal plane in this embodiment is 30°-90°. Such setting facilitates the production and processing of round tube parts with different inclination angles according to product requirements. Other compositions and connections are the same as those in Embodiment 11.

The included angle between the inclined end surface of the angle positioning die A-1 in this embodiment and the horizontal plane is 45°, so that the shear strength of the core can be optimized.

Specific Embodiment Thirteen: This embodiment is described with reference to FIG. 16 , FIG. 21 to FIG. 23 , and the lower end of the inclined end surface of the angle positioning mold A-1 of this embodiment is provided with a limiting platform A-9. In this way, the fixture body 2 is installed on the angle positioning mold 1 through bolts, and the limit table 9 provides a support for the fixture body 2, so that the installation and positioning of the fixture body 2 is more accurate. Other compositions and connections are the same as those in Embodiment 12.

Specific Embodiment Fourteen: This embodiment is described with reference to FIG. 16 to FIG. 19 and FIG. 25 . The upper end surface of the unidirectional corrugated block A-3 of this embodiment is provided with a plurality of unidirectional grooves A-10 at equal intervals. Such arrangement facilitates the cooperation with the adjacent two-way corrugated block to clamp the round pipe to be processed. Other compositions and connections are the same as those in Embodiment 13.

Embodiment 15: This embodiment is described with reference to FIG. 16 to FIG. 19 and FIG. 26 . The two end surfaces of the bidirectional corrugated block A-4 in this embodiment are provided with a plurality of bidirectional grooves A-11 at equal intervals. Such arrangement is convenient to cooperate with the adjacent one-way corrugated block A-3 or two-way corrugated block A-4 to clamp the round pipe to be processed. Other compositions and connections are the same as those in Embodiment 14.

Specific Embodiment Sixteen: This embodiment will be described with reference to FIG. 25 and FIG. 26 . The multiple one-way grooves A-10 and the multiple two-way grooves A-11 of this embodiment have the same groove size. Such setting facilitates the clamping of the round pipe to be processed. Other compositions and connections are the same as those in Embodiment 15.

Specific Embodiment Seventeen: This embodiment will be described with reference to FIG. 20 . The height of the lateral limiting block A-8 in this embodiment is slightly lower than that of the one-way corrugated block A-3 and the two-way corrugated block A-4. Such setting is convenient for providing support for the side of the round pipe to be processed, and does not interfere with the position of the fixed-angle pressing block A-7. Other compositions and connections are the same as those in Embodiment 16.

Embodiment 18: This embodiment is described with reference to FIG. 16 . The clamp body A-2 of this embodiment is detachably installed on the inclined end surface of the angle positioning mold A-1. Such setting is convenient for group processing in batches, and round pipes with different inclination angles can be processed according to production needs, with wide application range and strong versatility. Other compositions and connections are the same as those in Embodiment 17.

Specific Embodiment Nineteen: This embodiment is described with reference to FIG. 16. In Step 3 of this embodiment, a plurality of inclined round tubes 3 with narrow and long notches are inserted one by one in a plurality of first lock pieces 4 and a plurality of second locks. The two inclined circular tubes on both sides of the interlocking groove 6 are inserted into the interlocking groove 7 of the sheet 5 . In actual use, the inclination angle of the inclined circular tube 3 with the long and narrow notches is set at 45°, and the shear strength of the core is optimal. Other compositions and connections are the same as those in Embodiment 18.

Claims (10)

1. a kind of hollow dot matrix-honeycomb of all-metal mixes sandwich structure, it includes top panel (1) and lower panel (2), top panel (1) it is be arranged in parallel up and down with lower panel (2), it is characterised in that：It also includes square honeycomb interlocking composition piece and multiple bands are narrow The Inclined Pipe (3) of long rabbet, plate (1) disposed above and lower panel (2) after square honeycomb interlocking composition piece interlocking assembling Between form the square honeycomb assembly of interlocking, multiple Inclined Pipes (3) with elongated slots one by one interlocking be connected to it is above-mentioned embedding In the square honeycomb assembly of lock, form the complete hollow pyramid dot matrix-square honeycomb of all-metal and mix fuse, then Combined with top panel (1) and lower panel (2) and to form the hollow pyramid dot matrix-square honeycomb of all-metal and mix sandwich structure.

2. the hollow dot matrix-honeycomb of a kind of all-metal according to claim 1 mixes sandwich structure, it is characterised in that：It is square Shape honeycomb interlocking composition piece includes multiple first locking plates (4) and multiple second locking plates (5), and multiple first locking plates (4) are equidistantly flat Row is set, and multiple second locking plates (5) equidistantly be arranged in parallel and interlocking is plugged on multiple first locking plates (4) one by one.

3. the hollow dot matrix-honeycomb of a kind of all-metal according to claim 2 mixes sandwich structure, it is characterised in that：It is multiple The top of first locking plate (4) and the bottom of multiple second locking plates (5) equidistantly open up grafting interlocking groove (6).

4. the hollow dot matrix-honeycomb of a kind of all-metal according to claim 3 mixes sandwich structure, it is characterised in that：It is multiple The top of first locking plate (4) and multiple second locking plates (5) symmetrically tilts positioned at the both sides of its grafting interlocking groove (6) and opens up two Inclined Pipe interlocking groove (7).

5. the hollow dot matrix-honeycomb of a kind of all-metal according to claim 4 mixes sandwich structure, it is characterised in that：With narrow The bottom of the Inclined Pipe (3) of long rabbet opens up honeycomb lath interlocking groove (8).

6. the hollow dot matrix-honeycomb of a kind of all-metal according to claim 5 mixes sandwich structure, it is characterised in that：With narrow The Inclined Pipe (3) of long rabbet and straight line where the interlocking grafting intersection of multiple first locking plates (4) and multiple second locking plates (5) Interlocking grafting is carried out into 0 ° -60 ° of angle directions, the complete hollow pyramid truss dot matrix-square honeybee of all-metal is formed Nest mixes fuse.

7. the hollow dot matrix-honeycomb of a kind of all-metal according to claim 1 or 6 mixes sandwich structure, it is characterised in that：Band The material of the Inclined Pipe (3) of elongated slots is identical with the first locking plate (4) and the second locking plate (5).

8. the hollow dot matrix-honeycomb of all-metal in a kind of usage right requirement 1 to 7 described in any one claim mixes sandwich The interlocking preparation method of structure, it is characterised in that：It includes following preparation flow：

Step one：Process the Inclined Pipe (3) with elongated slots, the first locking plate (4) and the second locking plate (5)：

Inclined Pipe (3) of the batch machining with elongated slots in the fixture frock for preparing the Inclined Pipe with notch； Wire EDM batch the first locking plate of cutting processing (4) and the second locking plate (5)；

Step 2：The installation of square honeycomb interlocking component：

Multiple first locking plates (4) are equidistantly be arranged in parallel, multiple second locking plates (5) equidistantly be arranged in parallel and embedding by grafting Interlocking is plugged on multiple first locking plates (4) locked groove (6) one by one, forms square honeycomb interlocking component, square honeycomb interlocking At four drift angles of component interlocking is carried out also by two the first locking plates (4) and two the second locking plates (5)；

Step 3：Inclined Pipe (3) interlocking with elongated slots is arranged on square honeycomb interlocking component, hollow gold is formed Word tower truss dot matrix-square honeycomb mixes fuse：

The Inclined Pipe (3) with elongated slots processed in step one is plugged on multiple first locking plates (4) and multiple one by one Two Inclined Pipe interlocking groove (7) places of grafting interlocking groove (6) both sides of two locking plates (5)；

Step 4：Prepare the hollow pyramid dot matrix-square honeycomb of all-metal and mix sandwich structure：

By top panel (1) and lower panel (2) contact respectively and covering step three of aliging hollow pyramid truss dot matrix-pros Shape honeycomb mixes the upper and lower ends of fuse, is connected by vacuum brazing, so far, completes the hollow pyramid of all-metal Dot matrix-square honeycomb mixes the preparation of sandwich structure.

9. the hollow dot matrix-honeycomb of a kind of all-metal according to claim 8 mixes the interlocking preparation method of sandwich structure, its It is characterised by：In step one be used for prepare with elongated slots Inclined Pipe fixture frock include angle positioning mould (A-1), Chuck body (A-2), two unidirectional ripple blocks (A-3), multiple two-directional corrugations blocks (A-4) and multiple stop screws (A-5), One end of angle positioning mould (A-1) is inclined end face, and chuck body (A-2) is rectangular box, and chuck body (A-2) is arranged on angle On the inclined end face for spending positioning mould (A-1), two unidirectional ripple blocks (A-3) are oppositely disposed in rectangular box, multiple two-way Ripple block (A-4) is arranged between two unidirectional ripple blocks (A-3), and multiple pipes to be processed are clamped in two neighboring multiple Between two-directional corrugations block (A-4) and it is clamped in a unidirectional ripple block (A-3) and unidirectional ripple block (A-3) phase Between an adjacent two-directional corrugations block (A-4), multiple stop screw (A-5) top pressures are spacing and by two unidirectional ripple blocks (A-3) and multiple two-directional corrugations blocks (A-4) upper surface alignment compress and by lateral Displacement will multiple pipes to be processed divide Row are fixed.

10. the hollow dot matrix-honeycomb of a kind of all-metal according to claim 9 mixes the interlocking preparation method of sandwich structure, It is characterized in that：The Inclined Pipe (3) with elongated slots and multiple first locking plates (4) and multiple second locking plates in step 3 (5) straight line where interlocking grafting intersection carries out interlocking grafting into 0 ° -60 ° of angle direction.