Forming method of high-temperature-resistant metal honeycomb equipment

Abstract

The invention discloses a high-temperature-resistant metal honeycomb equipment forming method which comprises the following steps: S1, performing blanking calculation, extracting a single corrugated plate in a metal honeycomb core body, and unfolding the single corrugated plate according to an equal length principle so as to determine size parameters of a pre-connected area and a to-be-stretched area; s2, chemical oil removal is conducted, specifically, the surface of the metal foil is treated, stains and oxide films on the surface of the metal foil are removed, the subsequent resistance welding strength is improved, and the situation of welding breakage during stretching is avoided; s3, surface activation is conducted, specifically, a mechanical-chemical synergistic process is adopted, silicon carbide abrasive paper is adopted for polishing the metal foil, the surface roughness Ra value of the metal foil is reduced, the specific surface area is increased, the contact angle is reduced, and finally drying treatment is conducted; and S4, material cutting is conducted, specifically, an ultra-short pulse laser cutting technology is adopted for metal foil machining, and the allowance of 10 mm is reserved so that the foil can be fixed. The stretching parameters can be flexibly adjusted according to different curvature requirements, and the preparation problem of the honeycomb core in a complex shape is successfully solved.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to a molding method of high temperature resistant metal honeycomb equipment. Background Art

[0002] As a typical representative of advanced lightweight materials, the engineering application advantages of honeycomb structure are mainly reflected in three core dimensions: first, excellent mechanical conduction properties. The hexagonal topological configuration can evenly distribute the stress in adjacent cells when subjected to longitudinal loads through the axial arrangement of the honeycomb wall, achieving a specific strength of up to 180-220MPa, which is 3-5 times higher than that of traditional solid structures. Secondly, it has significant mass efficiency. Taking aviation-grade aluminum honeycomb as an example, although the thickness of its core layer accounts for less than 15% of the overall sandwich structure, it can increase the out-of-plane bending stiffness by more than 40%. This "four-two-pound" characteristic has successfully reduced the weight of the Boeing 787 fuselage bulkhead by 28%. Thirdly, it has excellent environmental adaptability. The air layer of the closed-cell structure not only achieves an ultra-low thermal conductivity of 0.85-1.2W / (mK), but its porous damping characteristics can also reduce the vibration acceleration level by 15-20dB, which enables the solar wing deployment mechanism of the International Space Station to successfully overcome the resonance problem in the microgravity environment.

[0003] In the field of honeycomb structure preparation technology, the current industry mainly relies on two process systems: the precision forming method adopts a two-step manufacturing process - first, the micron-level metal foil is pressed into a corrugated semi-honeycomb structure through a high-precision rolling die (the forming accuracy reaches ±0.01mm), and then the node connection is achieved by pulse laser / resistance spot welding (the welding spot diameter is controlled at 0.3-0.5mm). Although this process can ensure that the honeycomb aperture deviation is less than 5μm, it is limited to the manufacturing efficiency of only 0.5m2 per hour, resulting in a honeycomb core delivery cycle of up to 6 months for a certain type of missile thermal protection system. The foil stretching method, in contrast, exhibits completely different characteristics: by applying a tensile stress of 120-150MPa to the pre-connected metal foil through a biaxial stretching machine, a large honeycomb core of 1.2m×2.4m can be formed within 3 minutes, but the unevenness of the plastic flow of the material causes the aperture size to fluctuate by ±0.25mm. 80% of high-end honeycomb components in the aerospace field still rely on precision forming processes, while the civilian market is limited by cost pressures and has to accept the performance compromise of products made by the stretching method.

[0004] This "precision-efficiency paradox" is particularly prominent in the manufacture of high-temperature alloy honeycombs. Taking Inconel 718 nickel-based alloy honeycombs as an example, the single-piece manufacturing cost of the traditional molding method is as high as 24,800 / m2. If the stretching method is adopted, the cost is expected to be reduced to 7,200 / m2. However, the existing stretching method usually uses a gluing process to achieve pre-connection of metal foils, which cannot meet the high temperature resistance requirements. It is urgent to develop a new preparation process for high-temperature resistant metal honeycomb cores to meet the requirements of high precision, high strength and low cost. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes a molding method of high temperature resistant metal honeycomb equipment.

[0006] A method for forming a high temperature resistant metal honeycomb equipment proposed by the present invention comprises the following steps:

[0007] S1: Cutting calculation, extract the single corrugated plate in the metal honeycomb core, unfold it according to the principle of equal length to determine the size parameters of the pre-connection and stretching areas;

[0008] S2: Chemical degreasing, surface treatment of metal foil, removal of stains and oxide film on its surface, improvement of subsequent resistance welding strength, and avoidance of welding fracture during stretching;

[0009] S3: Surface activation, using mechanical-chemical synergistic process, using silicon carbide sandpaper to polish the metal foil to reduce the surface roughness Ra value, increase the specific surface area, reduce the contact angle, and finally dry it;

[0010] S4: Material cutting: metal foil processing uses ultra-short pulse laser cutting technology, leaving a 10mm margin to fix the foil, and synchronous processing is achieved through a vacuum adsorption platform and a special fixture;

[0011] S5: Positioning and gluing: take a piece of metal foil, position and place the obtained foil by optical positioning, apply a small amount of high temperature resistant polyimide glue on the metal foil to be stretched according to the calculation result of blanking, and paste copper foil; the adhesive layer can withstand temperature > 300℃ to avoid copper foil debonding during subsequent welding or heat treatment; repeat this process to combine the metal foil into a multilayer board;

[0012] S6: Resistance roll welding, put the metal multilayer board into the resistance roll welding machine for welding; because the principle of resistance roll welding is to use resistance heat, the resistance of copper foil is much smaller than that of high temperature alloy. When a certain current is passed, the copper foil has low resistance and cannot be welded successfully, while the foil area without copper foil is welded successfully. The welding current used is 1kA, and the roll welding speed is 0.1 meters per second.

[0013] S7: Stretch forming. Place the welded multi-layer board obtained in the above steps on the multi-point stretching device of the present invention, and fix the multi-layer board on it by welding; to improve plasticity and meet the requirements of high-precision forming, heating stretching can be adopted, and the heating temperature is 100-300 °C. Each honeycomb of this multi-point stretching device is regarded as an independent unit, and the loading speed of each unit can be set separately, and the number of units can be controlled to meet the needs of honeycombs of different lengths; the multi-point stretching device of the present invention can not only uniformly stretch the whole to obtain a honeycomb core without curvature, but also control the curvature of the honeycomb core by controlling the stretching speed of each unit.

[0014] S8: Quality inspection. Adopt the inspection combining industrial CT scanning and laser ultrasonic technology. First, scan the obtained honeycomb core. Through the micro-focus X-ray three-dimensional tomography technology, identify volumetric defects such as internal welding detachment and deformation in the honeycomb core. Then use laser ultrasonic detection. Pulse laser is used to excite broadband ultrasonic waves, and laser interference technology is used to capture interface defects in the welding joint area in real time, so as to realize the rapid detection of honeycomb structure welds on the production line.

[0015] Preferably, in the step S2, a dual-scheme cleaning system is adopted in the chemical degreasing treatment stage. Through the synergistic effect of organic solvents and alkaline solutions, comprehensive degreasing is achieved to obtain a clean metal foil. First, use pure acetone with a purity of ≥99.9% to clean the metal foil. Due to its low surface tension characteristics, it can effectively penetrate micron-level pores and dissolve non-polar pollutants such as mineral oil in the metal. Then perform alkali cleaning using a sodium hydroxide-sodium silicate buffer solution with a pH of 10-12. By adding 0.5% non-ionic surfactant TritonX-100, saponification reaction is used to decompose animal and vegetable oils. The critical micelle concentration of the surfactant is controlled below 0.02% to enhance the emulsifying ability. Ultrasonic waves with a frequency of 40 kHz are used in the middle to generate cavitation effects, and a constant temperature of 50 °C is used to accelerate molecular movement, so that the cleaning efficiency is increased by 3 times.

[0016] Preferably, in the step S3, the 800-mesh silicon carbide sandpaper is used to polish the metal foil in the rolling direction of 30°, so that the surface roughness Ra value is reduced from 1.6 μm to 0.4 μm, and the specific surface area is increased by 40%. The activation liquid is composed of 10% nitric acid and 2% hydrofluoric acid. An active layer with a thickness of 5-10 nm is formed by treatment for 10 seconds, and the contact angle is reduced from 75° to less than 5°. Finally, drying treatment is carried out. Nitrogen with a purity of 99.9995% at -40 °C is used to purge the metal, and hot air circulation with a temperature of 80 °C and a wind speed of 2 m / s is used to make the surface water content <50 ppm. XPS analysis shows that the surface oxygen content is reduced from 1.2% to 0.12%, and the roughness is reduced to Ra≤0.8 μm.

[0017] Preferably, in the step S4, a 500W picosecond laser is used. Under the conditions of a frequency of 200kHz, a cutting speed of 800mm / s, and protection by high-purity argon gas, it can finally ensure an accuracy of ±0.005mm and a small heat-affected zone, and can stably process metal foils with a thickness of 50um. The copper foil processing is designed based on a hexagonal honeycomb structure. For a unit feature length of L1 = 10mm, a UV laser microprocessing system is used to precisely form a copper foil with a width of 17.32mm and a thickness of 10μm. An equipment with a processing area of 300mm×300mm is configured. Through a CCD vision system with a positioning accuracy of ±1μm and a tension control of 0.5 - 1N / cm, wrinkle-free processing with a repeat accuracy of ±2μm is achieved at a 355nm ultraviolet laser power of 3W and a cutting speed of 2m / s. Finally, chemical polishing or micro-blasting is performed for edge passivation treatment to eliminate micro-cracks. L1 is taken as 10mm. Since it is a hexagonal honeycomb core, the width of the copper foil used is The numerical value is The copper foil thickness is taken as 10um.

[0018] Preferably, in the step S5, a second foil strip is taken. The two ends of the first foil strip and the second foil strip are aligned according to the positioning holes. An appropriate amount of polyimide glue is evenly coated on the second foil strip at equal intervals, and copper foils are placed. The solder areas on the second strip and the first strip are evenly staggered. 10 first foil strips and second foil strips are alternately stacked and pressed tightly to obtain a required 20-layer titanium alloy multi-layer board. Finally, through a hot pressing step of maintaining for 10 minutes at 80°C and a pressure of 0.5MPa, the glue layer is promoted to level evenly, and vacuum-assisted lamination is introduced at a vacuum degree ≤10 -3 Pa to eliminate interlayer bubbles.

[0019] Preferably, in the step S6, the welding current used is 1kA, and the seam welding speed is 0.1 m per second.

[0020] Preferably, in the step S7, the stretching temperature is increased to 200°C. The two ends of the cylinder 1 are directly stretched by a machine to stretch the honeycomb structure and prepare a single-curvature metal honeycomb core. The stretching speed of the 6th unit is set to 1mm / s, and for the remaining units in the order of 5, 4, 3, 2, 1, the stretching speeds are increased to 1.1mm / s, 1.2mm / s, 1.3mm / s, 1.4mm / s, 1.5mm / s in sequence. The stretching speeds of the opposite stretching units are the same as those of 1 - 6 in magnitude and opposite in direction.

[0021] Preferably, in the step S8, a detection combining industrial CT scanning and laser ultrasonic technology is adopted. First, the obtained honeycomb core is scanned by industrial CT with a resolution of 5μm. Through the micro-focus X-ray three-dimensional tomography technology, internal 0.02mm of the honeycomb core can be accurately identified 3For the above-mentioned volumetric defects such as debonding, deformation, and air bubbles in the adhesive layer, laser ultrasonic testing is then used. By using pulsed laser to excite broadband ultrasonic waves and using laser interference technology to capture interface defects such as 0.1-mm-level microcracks in the welded joint area in real time, rapid detection of honeycomb structure welds on the production line can be achieved, the detection cycle can be shortened by 42%, and the missed detection rate can be reduced to less than 0.9%.

[0022] An forming method of high-temperature resistant metal honeycomb equipment proposed by the present invention has the following advantages:

[0023] 1. Breakthrough in the preparation of complex shapes: By adopting the innovative multi-point stretching technology, the stretching parameters can be flexibly adjusted according to different curvature requirements, and the preparation problem of honeycomb cores with complex shapes is successfully overcome. This characteristic enables the present invention to meet the stringent requirements in fields with special requirements for honeycomb shapes, such as aerospace and high-end industrial equipment, and provides key support for the optimization and upgrading of related industry products.

[0024] 2. High-temperature resistant, low-cost and efficient preparation: Abandoning the traditional bonding method that is prone to failure at high temperatures, the preparation of high-temperature resistant metal honeycomb cores is realized through resistance roll welding combined with multi-point stretching process. This process greatly simplifies the manufacturing process, reduces the production time cost, and at the same time reduces the dependence on expensive equipment and complex processes, effectively reducing the overall manufacturing cost, and has great application potential in fields that are sensitive to costs and have high-temperature usage requirements.

[0025] 3. High-precision and high-strength preparation: Resistance welding replaces the bonding in the traditional stretching method, significantly improving the preparation precision and strength of honeycomb cores. Resistance welding uses resistance heat to achieve precise welding, which can effectively reduce welding defects and make the honeycomb core structure more stable. When subjected to extreme working conditions such as high temperature and high pressure, it can still maintain good mechanical properties, greatly improving the product quality and reliability. By pre-setting copper foils for precise control of resistance heat, the controllable welding of multi-layer boards is realized, avoiding the problem of uncontrollable dimensions caused by applying solder resistants.

[0026] 4. Advantages of large-scale preparation: Compared with the traditional manufacturing process of high-temperature alloy honeycomb cores, the process flow of the present invention is simple and clear, and the operations of each link are easy to master and standardize. From the pretreatment of metal foils to the final forming of honeycomb cores, each step can be efficiently connected, which is conducive to large-scale production. Whether it is small-batch customization or large-scale industrial manufacturing, stable and efficient output can be achieved, strongly promoting the wide application of high-temperature resistant metal honeycomb cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the process flow chart of forming a high-temperature resistant honeycomb core for an forming method of high-temperature resistant metal honeycomb equipment proposed by the present invention;

[0028] Figure 2Schematic diagram of the arrangement of welding copper foils for a method of forming a high-temperature resistant metal honeycomb equipment proposed by the present invention;

[0029] Figure 3 Schematic diagram of the welded stacked multi-layer plates for a method of forming a high-temperature resistant metal honeycomb equipment proposed by the present invention;

[0030] Figure 4 Schematic diagram of a single-curvature honeycomb core obtained by multi-point stretching for a method of forming a high-temperature resistant metal honeycomb equipment proposed by the present invention;

[0031] Figure 5 Schematic diagram of a single-curvature honeycomb core of TC4 foil obtained by multi-point stretching for a method of forming a high-temperature resistant metal honeycomb equipment proposed by the present invention;

[0032] Figure 6 Schematic diagram of the pre-connection area and the stretching area for a method of forming a high-temperature resistant metal honeycomb equipment proposed by the present invention. Detailed implementation manners

[0033] Reference Figures 1-6, the present invention provides a method for forming a high-temperature resistant metal honeycomb equipment, including: blanking calculation: extracting a single corrugated plate from the metal honeycomb core, unfolding it according to the equal length principle to determine the size parameters of the pre-connection and the area to be stretched; the metal foil is made of high-temperature alloy GH4099 foil; chemical degreasing: treating the surface of the high-temperature alloy GH4099 foil to remove the stains and oxide films on its surface, so as to improve the subsequent resistance welding strength and avoid welding fracture during stretching. A dual-scheme cleaning system is adopted in the chemical degreasing treatment stage, and comprehensive degreasing is achieved through the synergistic effect of organic solvents and alkaline solutions to obtain a clean high-temperature alloy GH4099 foil. First, clean the high-temperature alloy GH4099 foil with pure acetone with a purity ≥ 99.9%, and use its low surface tension characteristics to effectively penetrate micron-level pores and dissolve non-polar pollutants such as mineral oil in the high-temperature alloy GH4099. Then perform alkali washing, using a sodium hydroxide-sodium silicate buffer solution with a pH of 10-12, adding 0.5% non-ionic surfactant TritonX-100, decomposing animal and vegetable oils through saponification reaction, controlling the critical micelle concentration of the surfactant below 0.02% to enhance the emulsifying ability, and cooperating with 40kHz ultrasonic waves to generate cavitation effects, accelerating molecular movement at a constant temperature of 50°C, so that the cleaning efficiency is increased by 3 times. Then perform pickling, and the process adopts a composite acid system, using 3% hydrofluoric acid (diluted with 40% concentration) and 20% nitric acid (diluted with 68% concentration), with a volume ratio of 1:6.7, and prepare and use immediately to ensure that the free acid concentration fluctuation < ±0.5%. In a constant temperature bath of high-temperature alloy material at 25°C, the PID control accuracy reaches ±0.5°C, and the treatment time is calculated according to the formula t = 0.1δ + 5 (δ is the thickness in mm). The thickness used in this experiment is less than 0.05mm, so the workpiece executes the 5-second lower limit, and put the foil into it for pickling. The treatment time of the foil used in this experiment is 5s, and finally, in the neutralization stage, use a 5% sodium bicarbonate solution with a pH of 8.5-9.2.

[0034] Surface activation: Adopt a mechanical-chemical synergistic process, polish the high-temperature alloy GH4099 foil with 800-mesh silicon carbide sandpaper (particle size 21.8μm) in the rolling direction of 30°, so that the surface roughness Ra value decreases from 1.6μm to 0.4μm, and the specific surface area increases by 40%. The activation solution consists of 10% nitric acid and 2% hydrofluoric acid, and a 5-10nm thick active layer is formed after 10 seconds of treatment, the contact angle decreases from 75° to less than 5°, and finally, perform a drying treatment, blow the high-temperature alloy GH4099 with nitrogen with a purity of 99.9995% at -40°C, and cooperate with hot air circulation at 80°C and a wind speed of 2m / s to make the surface water content < 50ppm. XPS analysis shows that the surface oxygen content decreases from 1.2% to 0.12%, and the roughness decreases to Ra ≤ 0.8μm.

[0035] Material Cutting: The processing of GH4099 superalloy foil uses an ultra-short pulse laser cutting process. A foil stack with a length of 110 mm, a stretching area of 100 mm, a 10 mm margin reserved for fixing the foil, a width of 10 mm, and 10 layers is selected, and synchronous processing is achieved through a vacuum adsorption platform and a special fixture. Using a 500W picosecond laser, at a frequency of 200 kHz, a cutting speed of 800 mm / s, and under the protection of high-purity argon, it can ensure an accuracy of ±0.005 mm, have a small heat-affected zone, and can stably process GH4099 superalloy foil with a thickness of 50um. The copper foil processing is designed based on a hexagonal honeycomb structure. For a unit feature length of L1 = 10 mm, a UV laser microprocessing system is used to precisely form a copper foil with a width of 17.32 mm and a thickness of 10μm. An equipment with a processing area of 300 mm × 300 mm is configured. Through a CCD vision system with a positioning accuracy of ±1μm and a tension control of 0.5 - 1 N / cm, wrinkle-free processing with a repeat accuracy of ±2μm is achieved at a 355nm ultraviolet laser power of 3W and a cutting speed of 2m / s. Finally, chemical polishing or micro-blasting is performed for edge passivation treatment to eliminate micro-cracks. When L1 is taken as 10 mm, due to the hexagonal honeycomb core, the width of the copper foil used is The value is The copper foil thickness is taken as 10um.

[0036] Positioning and Gluing: Take the first GH4099 superalloy foil strip, place it using optical positioning, and apply a small amount of high-temperature resistant polyimide glue (temperature resistance > 300℃ to avoid the glue layer failure during subsequent welding or heat treatment) at equal intervals on the first foil strip. Take the second foil strip, align the two ends of the first and second foil strips according to the positioning holes, apply an appropriate amount of polyimide glue on the second foil strip and place the copper foil, so that the solder areas on the second strip and the first strip are evenly staggered. Alternately stack 10 first and second foil strips and press them tightly to obtain a required 20-layer GH4099 superalloy multilayer board. Finally, through a hot pressing step of maintaining at 80℃ and 0.5 MPa for 10 minutes, the glue layer is promoted to level evenly, and vacuum-assisted lamination is introduced at a vacuum degree ≤ 10 -3 Pa to eliminate interlayer bubbles.

[0037] Resistance Seam Welding: Place the GH4099 superalloy multilayer board into a resistance seam welding machine for welding. Since resistance seam welding uses resistance heat and the resistance of the copper foil is much smaller than that of the superalloy, when a certain current is passed, the resistance at the copper foil is too low to achieve successful welding, while successful welding occurs at the GH4099 superalloy foil. The welding current used is 1 kA, and the seam welding speed is 0.1 m per second.

[0038] Stretch forming: Place the welded multi-layer board obtained in the above steps on the multi-point stretching device of the present invention. Since the metal to be stretched is GH4099, appropriately raising the temperature can improve the stretching efficiency and quality. In this stretching, the stretching temperature is increased to 200 °C, and the two ends of the cylinder 1 are directly stretched by the machine to expand the honeycomb structure. Set the stretching speed of the 6th unit to 1 mm / s, and for the remaining units in the order of 5, 4, 3, 2, 1, the stretching speed is increased to 1.1 mm / s, 1.2 mm / s, 1.3 mm / s, 1.4 mm / s, 1.5 mm / s in turn. The stretching speed of the opposite stretching unit is the same as that of 1-6 in magnitude and opposite in direction. Since some metal materials have certain springback characteristics, the springback angle needs to be considered during the stretching process, that is, the actual stretching angle should be larger than the designed angle.

[0039] Quality inspection: Adopt a detection method combining industrial CT scanning and laser ultrasonic technology. First, scan the obtained honeycomb core with industrial CT with a resolution of 5 μm. Through micro-focus X-ray three-dimensional tomography technology, accurately identify volumetric defects such as welding detachment and deformation inside the honeycomb core with a size above 0.02 mm 3 Then, use laser ultrasonic detection. Pulse laser is used to excite broadband ultrasonic waves, and laser interference technology is used to capture interface defects such as 0.1 mm-level microcracks in the welded joint area in real time. It can realize the rapid detection of the honeycomb structure weld seam on the production line, shorten the detection cycle by 42%, and reduce the missed detection rate to less than 0.9%.

[0040] As mentioned above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A method for forming a high-temperature resistant metal honeycomb equipment, characterized in that, It includes the following steps: S1: Blanking calculation. Extract a single corrugated plate from the metal honeycomb core, and expand it according to the equal-length principle to determine the size parameters of the pre-connection and stretching areas. S2: Chemical degreasing. Treat the surface of the metal foil to remove stains and oxide films on its surface, improve the subsequent resistance welding strength, and avoid welding fractures during stretching. S3: Surface activation. Adopt a mechanical-chemical synergistic process, use silicon carbide sandpaper to polish the metal foil, reduce the surface roughness Ra value, increase the specific surface area, reduce the contact angle, and finally perform a drying treatment. S4: Material cutting. Process the metal foil using an ultra-short pulse laser cutting process, leaving a 10-mm margin for fixation, and achieve synchronous processing through a vacuum adsorption platform and a special fixture. S5: Positioning and gluing. Take a metal foil strip, place it precisely using optical positioning. According to the blanking calculation results, apply a small amount of high-temperature-resistant polyimide glue to the stretching area of the metal foil strip and paste copper foil. The glue layer can withstand temperatures above 300°C to avoid copper foil debonding during subsequent welding or heat treatment. Repeat this process to combine the metal foils into a multi-layer board. S6: Resistance seam welding. Place the metal multi-layer board in a resistance seam welding machine for welding. Since the principle of resistance seam welding is to utilize resistance heat, the resistance of copper foil is much smaller than that of superalloy. When a certain current is passed, the resistance at the copper foil is too low to achieve successful welding, while the foil area without copper foil can be successfully welded. S7: Stretch forming. Place the welded multi-layer board obtained in the above steps on the multi-point stretching device of the present invention, and fix the multi-layer board by welding. To improve plasticity and meet the requirements of high-precision forming, heating stretching can be adopted, and the heating temperature is 100-300°C. S8: Quality inspection. Adopt a detection method combining industrial CT scanning and laser ultrasonic technology. First, scan the obtained honeycomb core. Through micro-focus X-ray three-dimensional tomography technology, identify volumetric defects such as internal welding defects and deformation in the honeycomb core. Then, use laser ultrasonic detection. Pulse laser is used to excite broadband ultrasonic waves, and laser interference technology is used to capture interface defects in the welding joint area in real time, realizing rapid detection of the honeycomb structure welds on the production line.

2. A method for forming a high-temperature resistant metal honeycomb equipment according to claim 1, characterized in that, In step S2, a dual-scheme cleaning system is adopted in the chemical degreasing treatment stage to achieve comprehensive degreasing through the synergistic effect of organic solvents and alkaline solutions, and obtain a clean metal foil. First, use pure acetone with a purity ≥99.9% to clean the metal foil. Utilize its low surface tension characteristics to effectively penetrate micron-sized pores and dissolve non-polar pollutants such as mineral oil in the metal. After that, perform alkali washing. Use a sodium hydroxide-sodium silicate buffer solution with a pH value of 10-12, add 0.5% non-ionic surfactant TritonX-100, decompose animal and vegetable oils through saponification reaction, control the critical micelle concentration of the surfactant below 0.02% to enhance the emulsifying ability, and at the same time cooperate with 40 kHz ultrasonic waves to generate cavitation effects, accelerate molecular movement under the condition of a constant temperature of 50°C, and increase the cleaning efficiency by 3 times.

3. A method for forming a high-temperature resistant metal honeycomb equipment according to claim 1, characterized in that, In the step S3, the metal foil is polished with 1000-mesh silicon carbide sandpaper in the rolling direction of 30°, so that the surface roughness Ra value is reduced from 1.6 μm to 0.4 μm, and the specific surface area is increased by 40%; the activation liquid is composed of 10% nitric acid and 2% hydrofluoric acid, and an active layer with a thickness of 5-10 nm is formed by treatment for 10 seconds, so that the contact angle is reduced from 75° to less than 5°; finally, a drying treatment is carried out, and nitrogen with a purity of 99.9995% at -40 °C is used to purge the metal, combined with hot air circulation at 80 °C and a wind speed of 2 m / s, so that the surface water content is reduced to <50 ppm; XPS analysis shows that the surface oxygen content is reduced from 1.2% to 0.12%, and the roughness is reduced to Ra≤0.8 μm.

4. A method for forming a high-temperature resistant metal honeycomb equipment according to claim 1, characterized in that In the step S4, a 500W picosecond laser is used to ensure a machining accuracy of ±0.005mm and a small heat affected zone under the conditions of a frequency of 200kHz, a cutting speed of 800mm / s and the protection of high-purity argon gas, and the metal foil with a thickness of 50μm can be stably processed; the copper foil processing is designed based on a hexagonal honeycomb structure. For the unit feature length of L1 = 10mm, a UV laser micro-machining system is used to precisely form a copper foil with a width of 17.32mm and a thickness of 10μm. An equipment with a processing area of 300mm×300mm is configured. Through a CCD vision system with a positioning accuracy of ±1μm and a tension control of 0.5-1N / cm, a wrinkle-free processing with a repeat accuracy of ±2μm is achieved at a 355nm ultraviolet laser power of 3W and a cutting speed of 2m / s. Finally, chemical polishing or micro-blasting is carried out for edge passivation treatment to eliminate micro-cracks; L1 is taken as 10mm. Since it is a hexagonal honeycomb core, the width of the copper foil used is L1, and the value is The copper foil thickness is taken as 10um.

5. A method for forming a high-temperature resistant metal honeycomb equipment according to claim 1, characterized in that, In the step S5, take the second foil tape, align the two ends of the first foil tape and the second foil tape according to the positioning holes, apply an appropriate amount of polyimide glue at equal intervals on the second foil tape and place the copper foil, so that the solder areas on the second tape and the first tape are evenly staggered, alternately stack multiple first foil tapes and second foil tapes and press them tightly to obtain the required multi-layer board; finally, through a hot pressing step of maintaining for 10 minutes at 80 °C and a pressure of 0.5 MPa, promote the uniform leveling of the glue layer, and introduce vacuum-assisted lamination under the condition of a vacuum degree ≤ 10 -3 Pa to eliminate the interlayer bubbles.

6. A method for forming a high-temperature resistant metal honeycomb equipment according to claim 1, characterized in that In the step S6, the welding current used is 1 kA, and the seam welding speed is 0.1 m per second.

7. A method for forming a high-temperature resistant metal honeycomb equipment according to claim 1, characterized in that, In the step S7, the stretching temperature is increased to 200 °C, and the two ends of the cylinder 1 are directly stretched by a machine to stretch the honeycomb structure, and a single-curvature metal honeycomb core is prepared. The stretching speed of the unit at position 6 is set to 1 mm / s, and for the remaining units in the order of 5, 4, 3, 2, 1, the stretching speeds are increased to 1.1 mm / s, 1.2 mm / s, 1.3 mm / s, 1.4 mm / s, 1.5 mm / s in turn. The stretching speeds of the opposite stretching units are the same as those of 1-6 in magnitude and opposite in direction.

8. A method for forming a high-temperature resistant metal honeycomb equipment according to claim 1, characterized in that In the step S8, the detection combining industrial CT scanning and laser ultrasonic technology is adopted. First, the honeycomb core obtained by industrial CT scanning with a resolution of 5μm is scanned. Through the micro-focus X-ray three-dimensional tomography technology, volumetric defects such as solder joint detachment and deformation with a size above 0.02mm inside the honeycomb core can be accurately identified. 3 After that, ultrasonic detection is used. By exciting broadband ultrasonic waves with pulsed lasers and using laser interference technology to capture interface defects such as microcracks with a size of 0.1mm level in the welding joint area in real time, rapid detection of the honeycomb structure weld seams on the production line can be realized. The detection cycle can be shortened by 42%, and the missed detection rate can be reduced to less than 0.9%.

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