Laser processing equipment and processing method for liquid hydrogen and liquid helium thermal insulation material

Abstract

The invention relates to laser processing equipment and method for liquid hydrogen and liquid helium heat insulation materials, the laser processing equipment comprises an unwinding mechanism, a transition platform and a cutting and welding mechanism, and the unwinding mechanism comprises a covering material unwinding roller and a plurality of heat insulation material unwinding rollers; the cutting and welding mechanism comprises a chain mesh belt assembly used for conveying heat insulation materials and racks arranged on the two sides of the chain mesh belt assembly, first linear assemblies are arranged at the upper ends of the racks and provided with first sliding blocks, second linear assemblies are arranged on the first sliding blocks, and second sliding blocks are arranged on the second linear assemblies. A laser welding assembly is fixed to the second sliding block, a first air collecting box with an opening in the upper end is arranged below the chain mesh belt assembly, and the first air collecting box is provided with a first air suction pipe with a first negative pressure pump. Meanwhile, the heat insulation performance of the obtained heat insulation material product is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of liquid hydrogen and liquid helium heat insulation material processing, and particularly to a laser processing device and method for liquid hydrogen and liquid helium heat insulation material. BACKGROUND

[0002] The storage and transportation of liquid hydrogen and liquid helium require high-performance heat insulation materials, which are usually composed of multiple layers of inorganic materials (such as glass fibers and ceramic fibers). The sealing, integrity, and cleanliness of the materials are extremely high. In the traditional processing technology, the materials are first cut by a metal cutting knife, and then the multiple layers of materials are sewn manually. This processing method has low cutting and sewing distribution operation efficiency. When the multiple layers of materials are transported to the sewing process after cutting, secondary pollution may occur. During the sewing process, the needle and thread pierce the heat insulation material, damaging the integrity of the heat insulation material. Moreover, the obtained multiple layers of materials are prone to delamination, affecting the heat insulation performance. In addition, the metal cutting knife has low precision, and it is difficult to process special-shaped parts. SUMMARY

[0003] The purpose of the present application is to provide a laser processing device and method for liquid hydrogen and liquid helium heat insulation material, which can simultaneously cut and hot melt weld the heat insulation material, facilitate the cutting of special-shaped heat insulation material, and ensure the heat insulation performance of the processed heat insulation material.

[0004] The technical solution to achieve the purpose of the present application is as follows:

[0005] A laser processing device for liquid hydrogen and liquid helium heat insulation material, comprising a unwinding mechanism, a transition platform, and a cutting and welding mechanism. The unwinding mechanism comprises a cover material unwinding roller and multiple heat insulation material unwinding rollers. The transition platform has a bearing surface. The cutting and welding mechanism comprises a chain mesh belt assembly for conveying heat insulation material, and racks respectively arranged on both sides of the chain mesh belt assembly. The upper end of the rack is provided with a first linear assembly. The first linear assembly has a first slider controlled by the first linear assembly to move linearly. A second linear assembly is arranged on the first slider. A second slider controlled by the second linear assembly to move linearly is arranged on the second linear assembly. The movement directions of the first slider and the second slider are perpendicular to each other. A laser welding assembly is fixed on the second slider. A laser welding head is arranged at the lower end of the laser welding assembly. A first gas collection tank with an open upper end is arranged below the chain mesh belt assembly. The first gas collection tank is provided with a first suction pipe with a first negative pressure pump. A first clamping assembly is arranged between the first sliders. The first clamping assembly comprises a first connecting rod. Multiple first air cylinders are fixed on the first connecting rod. A first pressure plate is arranged below the first air cylinders. The first air cylinders have a first telescopic shaft fixedly connected with the first pressure plate.

[0006] After the above structure is adopted, the multiple thermal material unwinding rollers feed the multiple thermal insulation materials to the chain mesh belt assembly through the transition platform, the thermal insulation materials are stacked into multiple layers of thermal insulation materials, the covering material unwinding roller feeds the covering film to the upper surface of the multiple layers of thermal insulation materials to form the material to be processed, the two sides of the covering film exceed the multiple layers of thermal insulation materials, the first cylinder controls the first pressing plate to press down to press the material to be processed on the chain mesh belt assembly, the first linear assembly is started, the first sliding block moves along the running direction of the chain mesh belt assembly, the material to be processed is pulled forward and laid flat on the chain mesh belt assembly, then the first cylinder controls the first pressing plate to rise, the first linear assembly and the second linear assembly operate at the same time, the movement of the first sliding block and the second sliding block in two directions realizes the movement of the laser welding assembly on the horizontal plane according to the preset route, at the same time, the laser welding head emits laser to heat and cut and weld the material to be processed, after heat cutting and welding, the uppermost covering film is torn off, and the thermal insulation material product with the edge heat fusion welding integrated is obtained, in the process of heat cutting and welding, the first negative pressure pump is started, the first gas collecting box below the chain mesh belt assembly inhales the gas and smoke generated in the process of heat cutting and welding and transports them to the gas treatment device, at the same time, the suction of the first negative pressure pump can also increase the pressure of the covering film on the multiple layers of thermal insulation materials, the upper layer material and the lower layer material of the multiple layers of thermal insulation materials are kept in a closely connected state during heat cutting and welding, avoiding the problem of virtual welding and missed welding of the upper and lower layers of thermal insulation materials due to the large gap between the upper layer material and the lower layer material of the multiple layers of thermal insulation materials after heat cutting, improving the success rate of welding of the upper layer of thermal insulation material and the lower layer of thermal insulation material, the present application can cut the multiple layers of thermal insulation materials while heat fusion welding the outer edge of the cut product, and directly obtain an integrated special-shaped thermal insulation material product according to the demand, which greatly improves the production efficiency compared with the process of cutting first and then sewing, and ensures the thermal insulation performance of the obtained thermal insulation material product.

[0007] Preferably, in order to improve the absorption effect of the gas and smoke generated by heat cutting and welding, a second gas collecting box with an open lower end is arranged above the chain mesh belt assembly, the second gas collecting box is provided with a second suction pipe with a second negative pressure pump, the second negative pressure pump works synchronously with the first negative pressure pump, the second gas collecting box and the first gas collecting box inhale the gas and smoke generated by heat cutting and welding from above and below the material to be processed respectively, reducing the influence of the gas and smoke on the workers and the material to be processed.

[0008] Preferably, in order to facilitate the conveying and welding of the material to be processed, the chain mesh belt assembly comprises a mesh surface, chains fixedly connected to both sides of the mesh surface, and sprockets engaged with the chains, at least one sprocket motor for controlling the rotation of the sprockets is arranged on the rack, the rotating shaft of the sprocket motor is fixedly connected with the sprocket, and the sprocket motor controls the rotation of the sprocket through the rotating shaft, thereby controlling the running and stopping of the mesh surface.

[0009] Preferably, in order to facilitate the control of the movement of the first slider, the first linear assembly comprises a first motor and a first screw rod in transmission connection with the first motor, the first slider is sleeved on the first screw rod and in rotational connection with the first screw rod, a limiting protrusion is arranged on the first slider, a guide rail groove is arranged on the rack, the limiting protrusion extends into the guide rail groove, and the first slider is in sliding connection with the rack through the cooperation of the limiting protrusion and the guide rail groove.

[0010] Preferably, in order to facilitate the control of the movement of the second slider, the second linear assembly comprises a second motor fixed on one of the first sliders and a second screw rod in transmission connection with the second motor, the second slider is sleeved on the second screw rod and in threaded connection with the second screw rod, one end of the second screw rod is in transmission connection with the second motor, the other end is in rotational connection with the first slider on which the second motor is not installed, one or more guide rods are arranged between the two first sliders, both ends of the guide rod are fixedly connected with the first sliders, the guide rod passes through the second slider and is in sliding cooperation with the second slider.

[0011] Preferably, in order to facilitate the control of the movement of the laser welding assembly, two second sliders are arranged, a first threaded section and a second threaded section are arranged on the second screw rod, one second slider is sleeved on the first threaded section and the second threaded section respectively, the screw directions of the external threads of the first threaded section and the second threaded section are opposite, so that when the second motor drives the second screw rod to rotate, the two second sliders can have a mirror-symmetrical motion track, thereby obtaining a symmetrical heat insulation material product.

[0012] Preferably, in order to prevent the movement of the material to be processed caused by external force during the hot melting cutting and welding process, a second clamping assembly is arranged at one end of the rack close to the transition platform, the second clamping assembly comprises two support rods fixed on the two racks respectively, a second connecting rod arranged on the support rods, and a plurality of second air cylinders fixed on the second connecting rod, both ends of the second connecting rod are fixedly connected with the two support rods respectively, a second pressing plate is arranged below the second air cylinder, the second air cylinder is provided with a second telescopic shaft fixedly connected with the second pressing plate, when the laser welding assembly performs hot melting cutting and welding, the second air cylinder controls the second pressing plate to descend and press the material to be processed, after the processing is completed, the second pressing plate rises again, facilitating the subsequent conveying of the material to be processed to the chain mesh belt assembly.

[0013] Preferably, in order to reduce the air between the upper layer and the lower layer of the multi-layer thermal insulation material, the highest point of the thermal insulation material unwinding roller near the transition platform in the vertical direction is 5 cm higher than the bearing surface of the transition platform. During the process of the upper layer material being attached to the lower layer material on the transition platform, the gap between the upper layer material and the lower layer material gradually decreases, the air between the upper layer material and the lower layer material is discharged as much as possible, and the problem of excessive air between the upper layer material and the lower layer material causing the gap between the upper layer material and the lower layer material to be too large and the subsequent hot melt cutting and welding effect to be poor is avoided.

[0014] A laser processing method of liquid hydrogen and liquid helium thermal insulation material, comprising a laser processing device of liquid hydrogen and liquid helium thermal insulation material of any one of the above, the processing method comprising the following steps:

[0015] Step A, the covering material unwinding roller and the thermal insulation material unwinding roller are simultaneously fed, the sheet-shaped thermal insulation materials discharged by the plurality of thermal insulation material unwinding rollers form a multi-layer thermal insulation material layer, and the sheet-shaped covering film discharged by the covering material unwinding roller covers the multi-layer thermal insulation material layer to form a material to be processed. Both sides of the covering film extend to the outside of both sides of the multi-layer thermal insulation material layer, and the material to be processed passes through the transition platform and is conveyed to the chain mesh belt assembly;

[0016] Step B, the first cylinder controls the first pressing plate to descend and press the material to be processed on the chain mesh belt assembly, the first linear assembly drives the first sliding block to move, and at the same time, the chain mesh belt assembly starts, the material to be processed moves forward with the first pressing plate and the chain mesh belt assembly, and the material to be processed is laid on the chain mesh belt assembly;

[0017] Step C, the first cylinder controls the first pressing plate to rise, the first negative pressure pump starts to pump, the covering film is pressed by the downward pressure of the gas to form a pressure on the multi-layer thermal insulation material layer, the first linear assembly and the second linear assembly start to control the laser welding assembly to move according to the preset route, the laser welding head of the laser welding assembly emits laser to cut the material to be processed, and the cutting surfaces of each layer of material are hot melt welded to form an integral whole, and at the same time, the negative pressure pump sucks out the gas and smoke generated in the cutting and welding process of the material to be processed;

[0018] Step D, the laser cutting and welding of the material to be processed on the chain mesh belt assembly is completed, the staff takes away the processed product, and steps B and C are repeated until all the materials to be processed are processed.

[0019] A second gas collecting box with an open lower end is arranged above the chain mesh belt assembly, the second gas collecting box is provided with a second air suction pipe with a second negative pressure pump, and in step C, the second negative pressure pump and the first negative pressure pump are started synchronously, the flow rate of the first negative pressure pump per unit time is Q1, the flow rate of the second negative pressure pump per unit time is Q2, and Q1>Q2. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be described in further detail below with reference to the drawings and specific embodiments.

[0021] Figure 1 is a structural schematic diagram of the present application.

[0022] Figure 2 is a structural schematic diagram of the cutting and welding mechanism of the present application.

[0023] Figure 3 is a structural schematic diagram of the first clamping assembly of the present application.

[0024] Figure 4 is a structural schematic diagram of the second clamping assembly of the present application. DETAILED DESCRIPTION

[0025] By Figures 1 to 4The laser processing equipment for the liquid hydrogen and liquid helium heat insulation material comprises a unwinding mechanism, a transition platform 1 and a cutting and welding mechanism 2, the unwinding mechanism comprises a covering material unwinding roller 3 and a plurality of heat insulation material unwinding rollers 4, the transition platform has a bearing surface 5, the cutting and welding mechanism comprises a chain mesh belt assembly for conveying the heat insulation material and racks 6 arranged on the two sides of the chain mesh belt assembly respectively, the upper end of the rack is provided with a first linear assembly, the first linear assembly has a first sliding block 7 controlled by the first linear assembly to move linearly, the first sliding block is provided with a second linear assembly, the second linear assembly is provided with a second sliding block 8 controlled by the second linear assembly to move linearly, the movement directions of the first sliding block and the second sliding block are perpendicular to each other, the first linear assembly comprises a first motor 9 and a first screw rod 10 in transmission connection with the first motor, the first sliding block is sleeved on the first screw rod and is in rotational connection with the first screw rod, the first sliding block is provided with a limiting protrusion 11, the rack is provided with a guide rail groove 12, the limiting protrusion extends into the guide rail groove, the first sliding block is in sliding connection with the rack through the cooperation of the limiting protrusion and the guide rail groove, the second linear assembly comprises a second motor 13 fixed on one of the first sliding blocks and a second screw rod 14 in transmission connection with the second motor, the second sliding block is sleeved on the second screw rod and is in threaded connection with the second screw rod, one end of the second screw rod is in transmission connection with the second motor, the other end is in rotational connection with the first sliding block without the second motor, a guide rod 15 is arranged between the two first sliding blocks, the guide rod can be one or multiple, the two ends of the guide rod are fixedly connected with the first sliding blocks, the guide rod passes through the second sliding block and is in sliding cooperation with the second sliding block. The second sliding block is fixedly provided with a laser welding assembly 16, the lower end of the laser welding assembly is provided with a laser welding head 17, the lower side of the chain mesh belt assembly is provided with a first gas collecting box 18 with an open upper end, the first gas collecting box is provided with a first air suction pipe 19 with a first negative pressure pump (not shown in the figure), first clamping assemblies are arranged between the first sliding blocks, the first clamping assemblies comprise a first connecting rod 20, a plurality of first air cylinders 21 are fixedly arranged on the first connecting rod, a first pressing plate 22 is arranged below the first air cylinder, the first air cylinder has a first telescopic shaft 23 fixedly connected with the first pressing plate. The upper side of the chain mesh belt assembly is provided with a second gas collecting box 24 with an open lower end, the second gas collecting box is provided with a second air suction pipe 25 with a second negative pressure pump (not shown in the figure).

[0026] As Figure 2 shown, the chain mesh belt assembly comprises a mesh surface 26, chain links 27 fixedly connected with the two sides of the mesh surface and sprockets 28 engaged with the chain links, at least one sprocket motor 29 for controlling the rotation of the sprocket is arranged on the rack.

[0027] In some embodiments, as Figure 2As shown, the second slider is provided with 2, the second screw is provided with a first threaded segment 30 and a second threaded segment 31, the first threaded segment and the second threaded segment are respectively sleeved with a second slider, the outer thread of the first threaded segment and the outer thread of the second threaded segment are opposite in spiral direction.

[0028] In some embodiments, as shown in Figure 4 As shown, the second clamping assembly is provided at one end of the rack close to the transition platform, the second clamping assembly includes two support rods 32 fixed on the two racks respectively, a second connecting rod 33 provided on the support rod, and a plurality of second cylinders 34 fixed on the second connecting rod, both ends of the second connecting rod are fixedly connected with the two support rods, and the second cylinder is provided with a second pressing plate 35 below, and the second cylinder is provided with a second telescopic shaft 36 fixedly connected with the second pressing plate.

[0029] In some embodiments, in the vertical direction, the highest point of the heat insulation material unwinding roller close to the transition platform is 5cm higher than the bearing surface of the transition platform.

[0030] A laser processing method of liquid hydrogen liquid helium heat insulation material, comprising the laser processing equipment of any one of the above liquid hydrogen liquid helium heat insulation material, the processing method comprising the following steps:

[0031] Step A, the covering material unwinding roller and the heat insulation material unwinding roller are simultaneously fed, the sheet-shaped heat insulation material discharged by the plurality of heat insulation material unwinding rollers forms a plurality of heat insulation material layers, and the sheet-shaped covering film discharged by the covering material unwinding roller covers the plurality of heat insulation material layers to form a material to be processed, both sides of the covering film extend to the outside of both sides of the plurality of heat insulation material layers, and the material to be processed passes through the transition platform and is conveyed to the chain mesh belt assembly;

[0032] Step B, the first cylinder controls the first pressing plate to descend and press the material to be processed on the chain mesh belt assembly, the first linear assembly drives the first slider to move, and the chain mesh belt assembly starts at the same time, the material to be processed moves forward with the first pressing plate and the chain mesh belt assembly, and the material to be processed is laid on the chain mesh belt assembly;

[0033] Step C, the first cylinder controls the first pressing plate to rise, the first negative pressure pump starts to pump, the covering film is pressed by the gas to form a pressure on the plurality of heat insulation material layers, the first linear assembly and the second linear assembly start to control the laser welding assembly to move according to the preset route, the laser welding head of the laser welding assembly emits laser to cut the material to be processed, and the cutting surfaces of each layer of material are hot melt welded to form an integral whole, and the negative pressure pump sucks out the gas and smoke generated in the cutting and welding process;

[0034] Step D, the laser cutting and welding of the material to be processed on the chain mesh belt assembly is completed, the staff takes away the processed product, and steps B and C are repeated until all the materials to be processed are completed.

[0035] The chain mesh belt assembly is provided with a second gas collection tank with an open lower end, and the second gas collection tank is provided with a second suction pipe with a second negative pressure pump. In step C, the second negative pressure pump is started synchronously with the first negative pressure pump, the flow rate of the first negative pressure pump per unit time is Q1, the flow rate of the second negative pressure pump per unit time is Q2, and Q1> Q2.

[0036] In some embodiments, the laser welding assembly in step C is a carbon dioxide laser, the wavelength of the laser emitted by the laser welding head is 1 μm or 10.6 μm, and the laser power is 55 W-600 W. The specific laser power can be 55 W, 65 W, 80 W, 100 W, 150 W, 300 W or 600 W.

[0037] In some embodiments, the total of the multi-layer heat insulation material is obtained by stacking 30 layers of heat insulation material, the laser slitting power is 150 W, the slitting speed is 10 m / min, and the hot melt welding energy density is 100 J / mm 2 The peel strength of the adjacent two layers of heat insulation material is 6 N / cm.

[0038] Adopt above-mentioned structure after, multiple hot material pay-off roller will multiple heat insulation material through transition platform pay-off to chain mesh belt assembly, heat insulation material is overlapped into multiple layers of heat insulation material, covering material pay-off roller pay-off covering film to the upper surface of multiple layers of heat insulation material forms the material to be processed, the both sides of covering film all exceed multiple layers of heat insulation material, first air cylinder controls first pressing plate and presses down and tightens the material to be processed on chain mesh belt assembly, first linear assembly starts, so that first sliding block moves along the running direction of chain mesh belt assembly, pulls the material to be processed forward and lays flat on chain mesh belt assembly, then first air cylinder controls first pressing plate and rises, first linear assembly and second linear assembly operate simultaneously, through the movement of first sliding block and second sliding block in two directions, realize that laser welding assembly moves on horizontal plane according to preset route, while laser welding head emits laser to heat melting cutting and welding of the material to be processed, after heat melting cutting and welding, tear off the uppermost covering film, the heat insulation material product with edge heat melting welding is integrated, in the process of heat melting cutting and welding, first negative pressure pump starts, first gas collecting box under chain mesh belt assembly is inhaled to the material to be processed, and the gas and smoke generated in the process of heat melting cutting and welding are transported to the gas treatment device, while the suction of first negative pressure pump can also increase the pressure of covering film on multiple layers of heat insulation material, the upper layer material and the lower layer material of multiple layers of heat insulation material are kept in the state of close connection during heat melting cutting and welding, avoid the problem that the upper layer material and the lower layer material of multiple layers of heat insulation material are too large after heat melting cutting and welding, and the outer edge of the upper layer material and the lower layer material of the heat insulation material is virtual welding, the welding of the upper layer heat insulation material and the lower layer heat insulation material is improved, the success rate of the welding of the upper layer heat insulation material and the lower layer heat insulation material is improved, the present application can cut the multiple layers of heat insulation material while welding the outer edge of the cutting product, and the integrated special-shaped heat insulation material product can be obtained directly according to the demand, compared with the process of cutting and sewing, the production efficiency is greatly improved, and the heat insulation performance of the obtained heat insulation material product is guaranteed.

[0039] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A laser processing device for liquid hydrogen and liquid helium insulation materials, characterized by: It includes an unwinding mechanism, a transition platform and a cutting and welding mechanism. The unwinding mechanism includes a covering material unwinding roller and multiple insulation material unwinding rollers. The transition platform has a bearing surface. The cutting and welding mechanism includes a chain mesh belt assembly for conveying insulation material and a frame respectively arranged on both sides of the chain mesh belt assembly. A first linear assembly is provided at the upper end of the frame. The first linear assembly has a first slider whose linear motion is controlled by the first linear assembly. The first slider is provided with a second linear assembly. The second linear assembly is provided with a second slider whose linear motion is controlled by the second linear assembly. The movement directions of the first slider and the second slider are perpendicular to each other. A laser welding assembly is fixed on the second slider. A laser welding head is provided at the lower end of the laser welding assembly. A first air collecting box with an upper end opening is provided below the chain mesh belt assembly. The first air collecting box is provided with a first suction pipe with a first negative pressure pump. A first clamping assembly is provided between the first sliders. The first clamping assembly includes a first connecting rod. Multiple first cylinders are fixed on the first connecting rod. A first pressure plate is provided below the first cylinder. The first cylinder has a first telescopic shaft fixedly connected to the first pressure plate.

2. The laser processing equipment for liquid hydrogen and liquid helium insulation materials according to claim 1, characterized in that: A second air collecting box with an open lower end is provided above the chain mesh belt assembly, and the second air collecting box is provided with a second suction pipe with a second negative pressure pump.

3. The laser processing equipment for liquid hydrogen and liquid helium insulation materials according to claim 1, characterized in that: The chain mesh belt assembly includes a mesh surface, chains fixedly connected to both sides of the mesh surface, and sprockets engaged with the chains. The frame is provided with at least one sprocket motor for controlling the rotation of the sprocket.

4. The laser processing equipment for liquid hydrogen and liquid helium insulation materials according to claim 1, characterized in that: The first linear assembly includes a first motor and a first screw connected to the first motor in a transmission manner. The first slider is mounted on the first screw and is rotatably connected to the first screw. A limiting protrusion is provided on the first slider. A guide rail groove is provided on the frame. The limiting protrusion extends into the guide rail groove. The first slider is slidably connected to the frame through the cooperation between the limiting protrusion and the guide rail groove.

5. The laser processing equipment for liquid hydrogen and liquid helium insulation materials according to claim 4, characterized in that: The second linear assembly includes a second motor fixed to one of the first sliders and a second screw transmission connected to the second motor, the second slider is sleeved on the second screw and threadedly connected to the second screw, one end of the second screw is transmission connected to the second motor, and the other end is rotationally connected to the first slider without the second motor installed, one or more guide rods are arranged between the two first sliders, both ends of the guide rods are fixedly connected to the first slider, and the guide rods pass through the second slider and slideably cooperate with the second slider.

6. The laser processing equipment for liquid hydrogen and liquid helium insulation materials according to claim 5, characterized in that: There are two second sliders, and the second screw is provided with a first thread segment and a second thread segment. The first thread segment and the second thread segment are respectively equipped with a second slider, and the spiral direction of the external thread of the first thread segment is opposite to that of the external thread of the second thread segment.

7. The laser processing equipment for liquid hydrogen and liquid helium insulation materials according to claim 1, characterized in that: A second clamping assembly is provided at one end of the frame close to the transition platform. The second clamping assembly includes two support rods respectively fixed on the two frames, a second connecting rod provided on the support rods, and a plurality of second cylinders fixed on the second connecting rods. The two ends of the second connecting rod are respectively fixedly connected to the two support rods. A second pressure plate is provided below the second cylinder, and the second cylinder is provided with a second telescopic shaft fixedly connected to the second pressure plate.

8. The laser processing equipment for liquid hydrogen and liquid helium insulation materials according to claim 1, characterized in that: In the vertical direction, the highest point of the insulation material unwinding roller close to the transition platform is 5 cm higher than the bearing surface of the transition platform.

9. A laser processing method for liquid hydrogen and liquid helium insulation materials, characterized by: A laser processing device comprising the liquid hydrogen and liquid helium insulation material according to any one of claims 1 to 7, wherein the processing method comprises the following steps: Step A: The covering material unwinding roller and the insulation material unwinding roller unwind material simultaneously unwind material. The sheet insulation material unwound by the multiple insulation material unwinding rollers forms a multi-layer insulation material layer. The sheet covering film unwound by the covering material unwinding roller covers the multi-layer insulation material layer to form the material to be processed. Both sides of the covering film extend to the outside of both sides of the multi-layer insulation material layer. The material to be processed passes through the transition platform and is transported to the chain mesh belt assembly. Step B: The first cylinder controls the first pressing plate to descend and press the material to be processed onto the chain mesh belt assembly. The first linear assembly drives the first slider to move. At the same time, the chain mesh belt assembly starts. The material to be processed follows the first pressing plate and the chain mesh belt assembly and moves forward. The material to be processed is spread flat on the chain mesh belt assembly. In step C, the first cylinder controls the first pressure plate to rise, and the first negative pressure pump starts to pump air. The downward pressure of the gas exerts pressure on the covering film, which in turn exerts pressure on the multiple layers of thermal insulation material. The first and second linear assemblies are activated, and the laser welding assembly is controlled to move along a preset route. The laser welding head of the laser welding assembly emits laser light to cut the material to be processed, and the cut surfaces of the layers of material are heat-melted and welded together. At the same time, the negative pressure pump sucks out the gas and smoke generated during the cutting and welding process of the material to be processed. In step D, laser cutting and welding of the materials to be processed on the chain mesh belt assembly are completed. The staff takes away the processed products and repeats steps B and C until all the materials to be processed are processed.

10. The laser processing method for liquid hydrogen and liquid helium insulation materials according to claim 9, characterized in that: A second air collecting box with an opening at the lower end is provided above the chain mesh belt assembly, and the second air collecting box is provided with a second suction pipe with a second negative pressure pump. In step C, the second negative pressure pump is started synchronously with the first negative pressure pump, and the flow rate per unit time of the first negative pressure pump is Q1, and the flow rate per unit time of the second negative pressure pump is Q2, and Q1>Q2.

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