A three-cone structure laser fusion ignition target, an assembling device and an assembling method

Abstract

The application provides a three-cone structure laser fusion ignition target, an assembling device and an assembling method. The ignition target comprises side ignition cone mounting holes and two compression cone mounting holes arranged above and below, forming a three-cone structure. The device comprises a workbench, a storage base arranged on the workbench, a vacuum adsorption device, a dispensing device, an alignment device, a three-axis displacement table, a display mechanism and three image acquisition mechanisms. The method comprises the following steps: dispensing into the compression cone mounting holes and the ignition cone mounting holes of the ignition target by the dispensing device; assembling the compression cones into the compression cone mounting holes and assembling the ignition cones into the ignition cone mounting holes; adjusting and aligning the position of the ignition cones and the coaxiality of the two compression cones by the alignment device; and assembling the polymer spherical caps into the two calibrated compression cones. The application combines automatic assembly and manual assembly, and can improve the assembly precision and efficiency of the laser fusion ignition target.

Description

Technical Field

[0001] The present invention relates to the technical field of laser nuclear fusion, and in particular to a three-cone structure laser fusion ignition target, an assembly device and an assembly method. Background Art

[0002] Nuclear fusion is often referred to as the "ultimate energy" of mankind. The realization of controlled nuclear fusion can provide mankind with inexhaustible energy. Laser inertial confinement fusion (ICF) is one of the important ways to achieve controlled nuclear fusion, and has received widespread attention and vigorous research from countries such as the United States, the European Union, Japan, Russia and China. The National Ignition Facility (NIF) in the United States uses a laser setting the size of three football fields to conduct nuclear fusion experiments. The total cost of construction and operation is 3.5 billion US dollars. After decades of inertial confinement fusion research, it finally output more than 1.3 megajoules of energy in the experiment conducted in August 2021, but it is still a long way from the expected goal. Based on the challenges encountered by mankind in laser fusion, the double-cone collision ignition scheme proposed by Academician Zhang Jie in 1997 provided new ideas for the research of laser fusion.

[0003] Chinese invention patent application number CN202010584044.9 discloses a laser fusion ignition device and fusion ignition method. The patent describes a laser fusion ignition device consisting of two identical, separated hollow compression cones, along with a side ignition assembly. The positional relationship between the components of this structure places extremely high demands on assembly, requiring a spacing of 80-120 microns between the tops of the two compression cones.

[0004] The Chinese invention patent application number CN201510451197.5 discloses an automatic precision assembly platform and assembly method for conical-spherical cavity micro-parts. This patent is mainly aimed at the assembly of conical-spherical cavity micro-parts in conical shell targets. It can overcome the problems of low efficiency and poor precision in the traditional manual assembly process. However, it cannot accurately guarantee the coaxiality between different parts. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention aims to provide a three-cone structure laser fusion ignition target, an assembly device, and an assembly method. The present invention combines automated assembly with manual assembly, thereby increasing the flexibility of the assembly process and improving the assembly accuracy and efficiency of the laser fusion ignition target.

[0006] According to a first aspect of the present invention, there is provided a three-cone structure laser fusion ignition target, comprising a support frame, one end of which is provided with a clamping portion, and the other end of which comprises a side ignition cone mounting hole and two compression cone mounting holes arranged above and below; a support column is provided between the two compression cone mounting holes arranged above and below; the compression cone mounting hole is disc-shaped, and the surface of the disc-shaped compression cone mounting hole is provided with a peripheral boss for blocking the incidence of strong laser.

[0007] According to a second aspect of the present invention, there is provided an assembly device for a three-cone laser fusion ignition target, comprising:

[0008] A workbench, the workbench has a shockproof function, and is provided with a storage base, a vacuum adsorption device, a dispensing device, an alignment device, a three-axis displacement stage, a display mechanism, and three image acquisition mechanisms;

[0009] The storage base is located at the center of the workbench. The storage base is provided with a limiting groove for accommodating the object to be assembled. The storage base is configured to generate displacement in the X, Y, and Z directions.

[0010] The three image acquisition mechanisms are located around the storage base and are placed orthogonally, and are used to acquire images of the object to be assembled in the X, Y, and Z directions in real time; the display mechanism is used to display the images of the object to be assembled in the X, Y, and Z directions;

[0011] The three-axis translation stage includes a robotic arm for clamping a laser fusion ignition target. The robotic arm has multiple degrees of freedom and moves and rotates according to images of the object to be assembled in the X, Y, and Z directions.

[0012] Preferably, the vacuum adsorption device comprises a flexible suction head and a vacuum generator for providing vacuum suction force to the flexible suction head, and the vacuum suction force generated by the vacuum generator is adjustable.

[0013] Preferably, the dispensing device includes a dispensing micro-ring, a dispensing pen and a curing light source; the dispensing micro-ring is used to dip in ultraviolet curing glue and produce glue bubbles; the dispensing pen has a tip, which is used to puncture the glue bubble from the middle of the glue bubble and use the trace amount of glue retained at the tip to form a glue spot; the curing light source is used to irradiate and cure the glue spot.

[0014] Preferably, the alignment device includes a laser light source, a laser sensor, a processing and display module, and an adjustment probe. The laser light source is used to emit a laser beam with an extremely fine line width. The laser sensor is used to obtain the laser beam signal. The processing and display module is used to calculate and display the energy percentage value of the laser beam based on the laser beam signal. The adjustment probe is used to fine-tune the position of the compression cone and the ignition cone based on the energy percentage value.

[0015] According to a third aspect of the present invention, a method for assembling a three-cone laser fusion ignition target is provided, which is implemented using the above-mentioned assembly device for the three-cone laser fusion ignition target, comprising:

[0016] Using a dispensing device, dispensing glue into the compression cone mounting hole and the ignition cone mounting hole of the three-cone structure laser fusion ignition target respectively;

[0017] Assemble the compression cone into the compression cone mounting hole and the ignition cone into the ignition cone mounting hole respectively;

[0018] Using an alignment device to adjust and align the position of the ignition cone and the coaxiality of the two compression cones;

[0019] The polymer spherical caps are respectively assembled into the two calibrated compression cones.

[0020] Preferably, the dispensing of glue into the compression cone mounting hole and the ignition cone mounting hole of the three-cone structure laser fusion ignition target by a dispensing device respectively includes:

[0021] Pull the tip of the dispensing pen out of the glass tube with a fine tip to form a glass tip;

[0022] Use the dispensing micro ring to dip in the glue to form a uniform glue film in the dispensing micro ring;

[0023] Using the glass tip to pierce the adhesive film from a direction perpendicular to the adhesive film, a small amount of glue remains on the glass tip;

[0024] The glass tip is used to dispense glue into the ignition cone mounting hole and the two compression cone mounting holes respectively, thereby achieving micro-dispensing.

[0025] Preferably, the steps of respectively assembling the compression cone in the compression cone mounting hole and assembling the ignition cone in the ignition cone mounting hole include:

[0026] Using a vacuum adsorption device, the cone to be assembled is placed upside down in the limiting groove of the storage base, and images of the cone to be assembled in the X, Y, and Z directions are obtained, wherein the cone to be assembled is a compression cone or an ignition cone;

[0027] According to the images of the cone to be assembled in the X, Y, and Z directions, the support frame is driven to move and rotate by adjusting the three-axis translation stage so that the mounting hole corresponding to the cone to be assembled is directly above the cone to be assembled;

[0028] The supporting frame is driven to descend by adjusting the three-axis translation stage so that the cone to be assembled is exactly assembled in the mounting hole corresponding to the cone to be assembled.

[0029] Preferably, the adjusting and aligning the position of the ignition cone and the coaxiality of the two compression cones by using an alignment device comprises:

[0030] A support frame equipped with an ignition cone and two compression cones is fixed on the robotic arm of the three-axis translation stage;

[0031] Adjust the center axes of the two compression cone mounting holes to be horizontal and the line connecting the laser light source and the laser sensor to be parallel to the center axis of the compression cone. If the percentage of the laser beam received by the laser sensor is within the allowable range when the laser beam emitted by the laser light source passes through different positions of the compression cone hole, there is no need to adjust the positions of the two compression cones. Otherwise, use the adjustment probe to fine-tune the positions of the two compression cones.

[0032] Adjust so that the central axis of the ignition cone mounting hole remains horizontal. If the laser sensor does not receive any laser beam signal at any position after the laser beam emitted by the laser light source is reflected by the bottom of the ignition cone, there is no need to adjust the ignition cone position. Otherwise, use the adjustment probe to fine-tune the position of the ignition cone.

[0033] Preferably, the step of assembling the polymer spherical caps into the two calibrated compression cones comprises:

[0034] Fix the support frame to the robotic arm of the three-axis translation stage and adjust the position so that the central axes of the two compression cone mounting holes are vertical;

[0035] Using a dispensing device to dispense glue on the inner wall of the compression cone;

[0036] Fix the vacuum adsorption device on the mechanical arm of the three-axis translation stage, use the vacuum adsorption device to adsorb the polymer spherical cap, adjust the movement of the mechanical arm of the three-axis translation stage according to the images of the polymer spherical cap in the X, Y, and Z directions, and assemble the polymer spherical cap into one of the compression cones;

[0037] The support frame is driven to flip horizontally 180 degrees by a three-axis translation stage, and the polymer spherical cap is assembled into the other compression cone in the same way as the polymer spherical cap is assembled into one compression cone;

[0038] The support frame is irradiated with a curing light source to cure the glue at the glue-dotting position on the inner wall of the compression cone.

[0039] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0040] 1. The three-cone laser fusion ignition target, assembly device, and assembly method of the present invention combine automated and manual assembly methods, which can improve the flexibility of the assembly process and enhance the assembly precision and efficiency of the laser fusion ignition target. The present invention provides a novel and efficient assembly solution for a series of experiments in laser fusion ignition technology.

[0041] 2. The three-cone structure laser fusion ignition target, assembly device and assembly method of the present invention utilize a high-quality assembly platform to overcome the difficulties of micron-level precision assembly and avoid damage to the components of the laser fusion ignition target.

[0042] 3. The three-cone structure laser fusion ignition target, assembly device and assembly method of the present invention, through the support frame with a three-cone structure and combined with the micro-dispensing technology to ensure the quality of dispensing, make the laser fusion ignition target have good consistency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0044] Figure 1 This is a schematic structural diagram of an assembled three-cone laser fusion ignition target according to an embodiment of the present invention;

[0045] Figure 2 A schematic structural diagram of a support frame according to an embodiment of the present invention;

[0046] Figure 3 This is a schematic structural diagram of an assembly device for a three-cone laser fusion ignition target according to an embodiment of the present invention;

[0047] Figure 4 Schematic diagram of the structure of a dispensing device according to an embodiment of the present invention;

[0048] Figure 5 This is a schematic structural diagram of a dispensing micro-ring according to an embodiment of the present invention;

[0049] Figure 6 A schematic diagram of a glue dispensing pen tip retaining a trace amount of glue according to an embodiment of the present invention;

[0050] Figure 7 Schematic diagram of the alignment state of the compression cone according to an embodiment of the present invention;

[0051] Figure 8 Schematic diagram of a compression cone in a misaligned state according to an embodiment of the present invention;

[0052] Figure 9 Schematic diagram of the ignition cone alignment state according to an embodiment of the present invention;

[0053] Figure 10 A schematic diagram of an ignition cone misaligned state according to an embodiment of the present invention;

[0054] In the figure: 11 is a support frame, 12 is a clamping part, 13 is a compression cone, 131 is a compression cone hole, 14 is an ignition cone, 15 is a polymer spherical crown, 16 is a support column, 17 is a peripheral boss, 18 is a compression cone mounting hole, 19 is an ignition cone mounting hole, 21 is a workbench, 22 is an image acquisition mechanism, 23 is a display mechanism, 24 is a storage base, 25 is a three-axis translation stage, 26 is a vacuum adsorption device, 27 is a dispensing device, 271 is a dispensing micro ring, 272 is a dispensing pen, 273 is a curing light source, 274 is a film, 275 is glue, 28 is an alignment device, 281 is a laser light source, 282 is a laser beam, and 283 is a laser sensor. DETAILED DESCRIPTION

[0055] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several variations and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0056] The use of a three-cone structure laser fusion ignition target can reduce the energy of the laser used for fusion compression and ignition, and improve the stability of laser fusion ignition. Figure 1-2The embodiment of the present invention provides a three-cone structure laser fusion ignition target, which includes a support frame 11. The support frame 11 is used to support the various components of the laser fusion ignition target to ensure the formation of the required assembly relationship. The support frame 11 can be a flat structure. The support frame 11 includes an ignition cone mounting hole 19 on the side and two compression cone mounting holes 18 arranged above and below; the two compression cone mounting holes 18 can be used to install two compression cones 13, that is, each compression cone mounting hole 18 is respectively installed in a compression cone 13; the two compression cones After being installed in the compression cone mounting hole 18, the cone tops of the support frame 11 face each other, allowing the fuel to be compressed and ejected to collide, forming a high-density plasma. An ignition cone mounting hole 19 is used to mount the ignition cone 14. Ignition cone 14 is mounted on the side of the support frame 11, with its cone top aligned with the center of the two compression cones 13. When the laser acts on the cone top of ignition cone 14, it releases superthermal electrons that reach near the cone tops of the two compression cones 13, heating the high-density plasma to the required fusion temperature to achieve laser fusion ignition. A polymer spherical cap 15 is mounted on each of the two compression cones 13 for filling with fusion fuel. The support frame 11 can be manufactured using 3D printing with a printing accuracy of no less than 50 microns. Using high-precision 3D printing technology to obtain a support frame with a unique structure ensures excellent consistency and stability in the laser fusion ignition target. Furthermore, to ensure that the relative positional relationship between the three cones remains fixed after assembly, the support frame 11 can be made of resin, nylon, or metal. A clamping portion 12 is provided at one end of the support frame 11. The clamping portion 12 is used to clamp and secure the device to facilitate laser fusion physics experiments. A support column 16 can be provided between the two compression cone mounting holes, one above the other, to prevent deformation. The compression cone mounting hole is disc-shaped, and the surface of the disc-shaped compression cone mounting hole is provided with a peripheral boss 17 to block the plasma generated by the strong laser incident on the compression cone 13.

[0057] With respect to the three-cone structure laser fusion ignition target in the above embodiment, an embodiment of the present invention provides an assembly device for the three-cone structure laser fusion ignition target, such as Figure 3 As shown, the assembly device includes: a workbench 21, which has an anti-vibration function to avoid vibration during high-precision assembly; the workbench 21 is provided with a storage base 24, a vacuum adsorption device 26, a dispensing device 27, an alignment device 28, a three-axis displacement stage 25, a display mechanism 23 and three image acquisition mechanisms 22. In order to prevent vibration during high-precision assembly, each component is placed or fixed on the workbench 21, wherein the storage base 24 is located in the center of the workbench 21, and is provided with a limiting groove for accommodating the object to be assembled. The storage base 24 is configured to generate displacement in the three directions of X, Y, and Z, wherein the X, Y, and Z directions refer to Figure 3The center coordinate system; three image acquisition mechanisms 22 are located around the object placement base 24 and are placed orthogonally, and are used to acquire images of the object to be assembled in the X, Y, and Z directions in real time; the display mechanism 23 is used to display images of the object to be assembled in the X, Y, and Z directions; the three-axis translation stage 25 includes a robotic arm for clamping the laser fusion ignition target. Specifically, the robotic arm can clamp the clamping portion 12 at one end of the support frame 11. The robotic arm has multiple degrees of freedom and moves and rotates according to the images of the object to be assembled in the X, Y, and Z directions. Specifically, the image acquisition mechanism 22 can be a camera, and the three cameras are placed orthogonally, and are used to acquire real-time images of the same object to be assembled in the X, Y, and Z directions and display them on the display mechanism. By acquiring images of the object to be assembled and the corresponding cone mounting hole in three directions during the assembly process, the positional relationship between the assembled object and the corresponding cone mounting hole can be determined, and then the movement and rotation of the robotic arm of the three-axis translation stage 25 can be adjusted to achieve the required assembly position requirements.

[0058] It should be noted that the three-axis translation stage 25, vacuum adsorption device 26, dispensing device 27 and alignment device 28 do not have fixed position requirements on the workbench 21. They can be placed at appropriate positions on the workbench 21 according to specific circumstances and actual needs, and the position of each device can be moved and adjusted according to the assembly process.

[0059] As a key component of the assembly platform, the upper surface of the storage base 24 includes two different-sized limit slots, each for accommodating the compression cone 13 and the ignition cone 14, and limiting their displacement in the X, Y, and Z directions. The storage base 24 has three degrees of freedom. Specifically, it can be equipped with three knobs for adjusting displacement in the X, Y, and Z directions, respectively. Rotating these knobs allows for high-precision displacement of the storage base 24 in the X, Y, and Z directions, thereby achieving high-precision displacement of the compression cone 13 or the ignition cone 14 in the X, Y, and Z directions.

[0060] In order to enable the robotic arm to achieve multiple degrees of freedom, in some embodiments, the three-axis translation platform 25 includes not only the robotic arm but also a pneumatic control seat. The pneumatic control seat can be provided with multiple knobs, and the multiple knobs can achieve the purpose of adjusting the displacement of the robotic arm in the X, Y, and Z directions. The robotic arm is used to clamp the clamping part 12 of the support frame 11 and move it. The multiple degrees of freedom of the robotic arm are achieved by rotating the corresponding knobs of the pneumatic control seat, so that the clamped support frame 11 can be moved and rotated in the X, Y, and Z directions, thereby driving the movement and rotation of the compression cone mounting hole 18 and the ignition cone mounting hole 19.

[0061] In some embodiments, the vacuum adsorption device 26 may include a flexible suction head and a vacuum generator for providing vacuum suction to the flexible suction head. The vacuum suction generated by the vacuum generator is adjustable. The flexible suction head is used to adsorb tiny parts during the assembly process. The adsorption part can be made of a flexible material with a small elastic modulus to prevent damage or scratching of the adsorbed object.

[0062] In order to dispense glue into the compression cone mounting hole 18 and the ignition cone mounting hole 19 of the support frame 11 to achieve gluing of the compression cone 13 and the compression cone mounting hole 18, and the ignition cone 14 and the ignition cone mounting hole 19, in some embodiments, refer to Figure 4 The dispensing device 27 includes a dispensing micro-ring 271, a dispensing pen 272 and a curing light source 273; the dispensing micro-ring 271 is used to dip the UV curing glue and generate glue bubbles. The dispensing micro-ring 271 is a structure similar to an aperture. The middle of the dispensing micro-ring 271 is a circle or a polygon, such as a hexagon, and the radius of the circle or the side length of the polygon is continuously adjustable to obtain glue films of different thicknesses; refer to Figure 5 As shown, after the dispensing micro-ring 271 is dipped in the UV curing glue, an ultra-thin glue film 274 will be produced; the dispensing pen 272 has a tip, which is extremely fine and is used to puncture the glue bubble from the middle of the glue bubble and use the trace amount of glue retained at the tip to form a glue spot; Figure 6 As shown, after using the tip of the dispensing pen 272 to puncture the middle of the glue film 274, a trace amount of glue 275 will remain at the tip of the dispensing pen 272. The trace amount of glue at the tip can be used to achieve an ultra-trace glue spot; the curing light source 273 is used to irradiate and cure the glue spot to solidify it.

[0063] In order to achieve accurate calibration of the position of the ignition cone 14 and the coaxiality of the two compression cones 13, in some embodiments, the alignment device 28 may include a laser light source 281, a laser sensor 283, a processing and display module and an adjustment probe. The laser light source 281 is used to emit a laser beam with an extremely fine line width, the laser sensor 283 is used to obtain the laser beam signal, the processing and display module is used to calculate and display the energy percentage value of the laser beam based on the laser beam signal, and the percentage value is defined as the ratio of the energy value of the laser received by the laser sensor 283 to the energy value of the laser emitted by the laser light source 281. The adjustment probe is used to fine-tune the position of the compression cone and the ignition cone according to the energy percentage value. Specifically, for the compression cone, if the laser beam emitted by the laser light source passes through different positions of the compression cone and the percentage of the laser beam received by the laser sensor is within the allowable range, the alignment requirement is met. The two compression cones are then coaxial and there is no need to adjust their positions. Otherwise, the alignment requirement is not met and an adjustment probe is used to fine-tune the positions of the two compression cones. For the ignition cone, if the laser beam emitted by the laser light source is reflected by the bottom of the ignition cone and the laser sensor does not receive the laser beam at any position, the ignition cone is properly positioned and the alignment requirement is met, and there is no need to adjust the ignition cone position. Otherwise, the alignment requirement is not met and an adjustment probe is used to fine-tune the ignition cone position. The alignment requirement depends on the specific assembly requirements. During fine-tuning, the adjustment probe is first clamped to the robotic arm of the three-axis translation stage. The robotic arm of the three-axis translation stage is then moved to fine-tune the adjustment probe. The adjustment probe is then brought into direct contact with the cone to be fine-tuned. Fine-tuning the adjustment probe allows for fine-tuning of the position of the cone.

[0064] The assembly device of the embodiment of the present invention overcomes the difficulties of micron-level precision assembly and can avoid damage to the components of the laser fusion ignition target. The assembly device can combine automated assembly and manual assembly methods, thereby increasing the flexibility of the assembly process and improving the assembly accuracy and efficiency of the laser fusion ignition target.

[0065] An embodiment of the present invention further provides a method for assembling a three-cone laser fusion ignition target, which is implemented using the assembly device for the three-cone laser fusion ignition target in the above embodiment. The method includes:

[0066] S1. Use the dispensing device to dispense glue into the compression cone mounting hole and the ignition cone mounting hole respectively.

[0067] To achieve micro dispensing, in some embodiments, S1 may include:

[0068] S11, using a glass tube drawing method to pull out a glass tube with a thin tip from the tip of the dispensing pen to form a glass tip, which can be used as a basic component of the dispensing pen;

[0069] S12, using the dispensing micro-ring to dip into the glue, the glue is UV curing glue, and due to the surface tension of the glue, a uniform glue film is formed in the dispensing micro-ring;

[0070] S13, using a glass tip to pierce the film perpendicular to the film, leaving a small amount of glue on the glass tip;

[0071] S14. Use the glass tip to dispense glue into the ignition cone mounting hole and the two compression cone mounting holes. The trace glue retained on the glass tip will spontaneously and evenly distribute around the circular mounting holes under the action of surface tension, thus achieving micro-dispensing.

[0072] S2. Assemble the compression cone into the compression cone mounting hole and the ignition cone into the ignition cone mounting hole respectively.

[0073] In order to ensure that the cone to be assembled is exactly assembled in the mounting hole corresponding to the cone to be assembled, in some embodiments, S2 includes:

[0074] S21. Using a flexible suction head of a vacuum suction device, place the cone to be assembled upside down in a limiting groove of the storage base. After focusing an image acquisition mechanism, such as a camera, images of the cone to be assembled in the X, Y, and Z directions are acquired. If the cone to be assembled is a compression cone or an ignition cone, it is important to place the cone upside down in the corresponding limiting groove to limit displacement of the cone in the X, Y, and Z directions.

[0075] S22. Fix the support frame to the robotic arm of the three-axis translation stage. According to the images of the cone to be assembled in the X, Y, and Z directions, adjust the robotic arm of the three-axis translation stage to drive the support frame to move and rotate so that the mounting hole corresponding to the cone to be assembled is directly above the cone to be assembled.

[0076] S23. The support frame is driven downward by adjusting the mechanical arm of the three-axis translation stage so that the cone to be assembled is exactly assembled in the mounting hole corresponding to the cone to be assembled. This can be done with the assistance of the image acquisition mechanism to improve the assembly accuracy.

[0077] It should be noted that there is no restriction on the order of assembling the compression cone or the ignition cone. According to the specific situation and actual needs, you can choose to assemble the compression cone first and then the ignition cone, or assemble the ignition cone first and then the compression cone.

[0078] S3. Using an alignment device, adjust and align the position of the ignition cone and the coaxiality of the two compression cones;

[0079] In some embodiments, S3 may include:

[0080] S31, fixing a support frame equipped with an ignition cone and two compression cones on a robotic arm of a three-axis translation stage;

[0081] S32. Adjust so that the central axis of the two compression cone mounting holes remains horizontal, and the line connecting the laser light source and the laser sensor is parallel to the central axis of the compression cone. If the percentage of the laser beam received by the laser sensor is within the allowable range when the laser beam emitted by the laser light source passes through different positions of the compression cone hole, there is no need to adjust the position of the two compression cones; refer to Figure 7 As shown, when the laser beam 282 emitted by the laser light source 281 passes through different positions of the compression cone hole 131, the laser sensor 283 receives the laser beam, and the percentage values ​​are all within the allowable range, that is, the alignment requirements are met, then the two compression cones 13 are coaxial, and there is no need to adjust the positions of the two compression cones 13; otherwise, the alignment requirements are not met, and the positions of the two compression cones 13 are fine-tuned using the adjustment probe; refer to Figure 8 As shown, when the laser beam 282 emitted by the laser light source 281 passes through different positions of the compression cone hole 131, reflection occurs due to position deviation, and the laser sensor 283 fails to receive the laser beam 282, indicating that the two compression cones 13 are not coaxial, and the compression cone 13 needs to be fine-tuned using an adjustment probe;

[0082] S33. Adjust the center axis of the ignition cone mounting hole to keep it horizontal. If the laser beam emitted by the laser light source is reflected by the bottom of the ignition cone, and the laser sensor does not receive any laser beam signal within the range of the bottom of the ignition cone, then there is no need to adjust the ignition cone position. Figure 9 As shown, when the laser beam 282 emitted by the laser light source 281 is reflected by the bottom of the ignition cone 14, the laser sensor 283 cannot receive the laser beam at any position, then the position of the ignition cone 14 is appropriate and there is no need to adjust the position of the ignition cone 14; otherwise, the alignment requirement is not met, and the position of the ignition cone 14 is fine-tuned using the adjustment probe, referring to Figure 10 As shown, when the laser beam 282 emitted by the laser light source 281 is reflected by the bottom of the ignition cone 14, the laser sensor 283 can receive the laser beam 282 at a certain position, indicating that the position of the ignition cone 14 is not appropriate and the ignition cone needs to be fine-tuned using an adjustment probe.

[0083] S4. Assemble the polymer spherical cap into the two calibrated compression cones respectively.

[0084] In some embodiments, S4 may include:

[0085] S41, fixing the support frame 11 on the mechanical arm of the three-axis translation stage, and adjusting the position so that the central axes of the two compression cone mounting holes are vertical;

[0086] S42, using a glue dispensing device to dispense glue on the inner wall of the compression cone, the specific method of dispensing glue is the same as the method of dispensing glue in step S1;

[0087] S43, fixing a vacuum adsorption device to the robotic arm of the three-axis translation stage, using the flexible suction head of the vacuum adsorption device to adsorb the polymer spherical cap, adjusting the movement of the robotic arm of the three-axis translation stage according to the images of the polymer spherical cap in the X, Y, and Z directions, and assembling the polymer spherical cap into one of the compression cones;

[0088] S44. Using a three-axis translation stage, the support frame 11 is driven to flip horizontally 180 degrees. The polymer spherical cap is assembled into the other compression cone in the same manner as the polymer spherical cap was assembled into one compression cone. This embodiment utilizes a support frame 11 having a three-cone structure and combines micro-dispensing technology to ensure the quality of dispensing, thereby ensuring good consistency and stability of the laser fusion ignition target.

[0089] S45 , using a curing light source to illuminate the support frame 11 , so that the glue at the glue-dotting position on the inner wall of the compression cone is cured.

[0090] The embodiments of the present invention utilize a high-quality assembly platform to overcome the difficulties of micron-level precision assembly and avoid damage to components of the laser fusion ignition target. The combination of automated assembly and manual assembly can improve the flexibility of the assembly process. The method is simple to operate and highly stable, and can improve the assembly precision and efficiency of the laser fusion ignition target. The present invention can provide a novel and efficient assembly solution for a series of experiments in laser fusion ignition technology and can provide high-quality target types for projects related to double-cone collision ignition.

[0091] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various modifications or variations within the scope of the claims without affecting the essence of the present invention. The above preferred features may be used in any combination as long as they do not conflict with each other.

Claims

1. An assembly device for a three-cone laser fusion ignition target, characterized in that: The three-cone laser fusion ignition target includes a support frame, one end of which is provided with a clamping portion, and the other end of which includes an ignition cone mounting hole on the side and two compression cone mounting holes arranged above and below; a support column is provided between the two compression cone mounting holes arranged above and below; the compression cone mounting hole is disc-shaped, and the surface of the disc-shaped compression cone mounting hole is provided with a peripheral boss for blocking strong laser incidence; the support frame has a flat structure, is manufactured by 3D printing, and has a printing accuracy of not less than 50 microns, and is made of resin, nylon or metal; the top of the ignition cone is aligned with the middle of the two compression cones; The device comprises: A workbench, the workbench has a shockproof function, and is provided with a storage base, a vacuum adsorption device, a dispensing device, an alignment device, a three-axis displacement stage, a display mechanism, and three image acquisition mechanisms; The storage base is located at the center of the workbench. The storage base is provided with a limiting groove for accommodating the object to be assembled. The storage base is configured to generate displacement in the X, Y, and Z directions. The three image acquisition mechanisms are located around the storage base and are placed orthogonally, and are used to acquire images of the object to be assembled in the X, Y, and Z directions in real time; the display mechanism is used to display the images of the object to be assembled in the X, Y, and Z directions; The three-axis translation stage includes a robotic arm for clamping the laser fusion ignition target, the robotic arm having multiple degrees of freedom, and the robotic arm moves and rotates according to the images of the object to be assembled in the X, Y, and Z directions; The alignment device includes a laser light source, a laser sensor, a processing and display module, and an adjustment probe. The laser light source is used to emit a laser beam with an extremely fine line width. The laser sensor is used to obtain the laser beam signal. The processing and display module is used to calculate and display the energy percentage value of the laser beam based on the laser beam signal. The adjustment probe is used to fine-tune the positions of the compression cone and the ignition cone based on the energy percentage value. For the compression cone, when the laser beam emitted by the laser light source passes through different positions of the compression cone, the percentage value of the laser beam received by the laser sensor is within the allowable range, that is, the alignment requirement is met, and the two compression cones are coaxial, and there is no need to adjust the positions of the two compression cones; otherwise, the alignment requirement is not met, and the adjustment probe is used to fine-tune the positions of the two compression cones; for the ignition cone, when the laser beam emitted by the laser light source is reflected by the bottom of the ignition cone, the laser sensor cannot receive the laser beam at any position, then the position of the ignition cone is appropriate, that is, the alignment requirement is met, and there is no need to adjust the position of the ignition cone; otherwise, the alignment requirement is not met, and the adjustment probe is used to fine-tune the position of the ignition cone.

2. The assembly device for a three-cone structure laser fusion ignition target according to claim 1, characterized in that: The vacuum adsorption device includes a flexible suction head and a vacuum generator for providing vacuum suction force to the flexible suction head, and the vacuum suction force generated by the vacuum generator is adjustable.

3. The assembly device for a three-cone structure laser fusion ignition target according to claim 1, characterized in that: The dispensing device includes a dispensing micro-ring, a dispensing pen and a curing light source; the dispensing micro-ring is used to dip in ultraviolet curing glue and produce glue bubbles; the dispensing pen has a tip, which is used to puncture the glue bubble from the middle of the glue bubble and use the trace amount of glue retained at the tip to form a glue spot; the curing light source is used to irradiate and cure the glue spot.

4. A method for assembling a three-cone laser fusion ignition target, implemented using the assembly device for a three-cone laser fusion ignition target according to any one of claims 1 to 3, characterized in that: include: Using a dispensing device, dispensing glue into the compression cone mounting hole and the ignition cone mounting hole of the three-cone structure laser fusion ignition target respectively; Assemble the compression cone into the compression cone mounting hole and the ignition cone into the ignition cone mounting hole respectively; Using an alignment device to adjust and align the position of the ignition cone and the coaxiality of the two compression cones; The polymer spherical caps are respectively assembled into the two calibrated compression cones.

5. The assembly method for a three-cone structure laser fusion ignition target according to claim 4, characterized in that: The method of dispensing glue into the compression cone mounting hole and the ignition cone mounting hole of the three-cone structure laser fusion ignition target by using a dispensing device comprises: Pull the tip of the dispensing pen out of the glass tube with a fine tip to form a glass tip; Use the dispensing micro ring to dip in the glue to form a uniform glue film in the dispensing micro ring; Using the glass tip to pierce the adhesive film from a direction perpendicular to the adhesive film, a small amount of glue remains on the glass tip; The glass tip is used to dispense glue into the ignition cone mounting hole and the two compression cone mounting holes respectively, thereby achieving micro-dispensing.

6. The assembly method for a three-cone structure laser fusion ignition target according to claim 4, characterized in that: The method of respectively assembling the compression cone in the compression cone mounting hole and the ignition cone in the ignition cone mounting hole comprises: Using a vacuum adsorption device, the cone to be assembled is placed upside down in the limiting groove of the storage base, and images of the cone to be assembled in the X, Y, and Z directions are obtained, wherein the cone to be assembled is a compression cone or an ignition cone; According to the images of the cone to be assembled in the X, Y, and Z directions, the support frame is driven to move and rotate by adjusting the three-axis translation stage so that the mounting hole corresponding to the cone to be assembled is directly above the cone to be assembled; The supporting frame is driven to descend by adjusting the three-axis translation stage so that the cone to be assembled is exactly assembled in the mounting hole corresponding to the cone to be assembled.

7. The assembly method for a three-cone structure laser fusion ignition target according to claim 4, characterized in that: The method of adjusting and aligning the position of the ignition cone and the coaxiality of the two compression cones by using the alignment device includes: A support frame equipped with an ignition cone and two compression cones is fixed on the robotic arm of the three-axis translation stage; Adjust the center axes of the two compression cone mounting holes to be horizontal and the line connecting the laser light source and the laser sensor to be parallel to the center axis of the compression cone. If the percentage of the laser beam received by the laser sensor is within the allowable range when the laser beam emitted by the laser light source passes through different positions of the compression cone hole, there is no need to adjust the positions of the two compression cones. Otherwise, use the adjustment probe to fine-tune the positions of the two compression cones. Adjust so that the central axis of the ignition cone mounting hole remains horizontal. If the laser sensor does not receive any laser beam signal at any position after the laser beam emitted by the laser light source is reflected by the bottom of the ignition cone, there is no need to adjust the ignition cone position. Otherwise, use the adjustment probe to fine-tune the position of the ignition cone.

8. The assembly method for a three-cone structure laser fusion ignition target according to claim 4, characterized in that: The step of assembling the polymer spherical caps into the two calibrated compression cones comprises: Fix the support frame to the robotic arm of the three-axis translation stage and adjust the position so that the central axes of the two compression cone mounting holes are vertical; Using a dispensing device to dispense glue on the inner wall of the compression cone; Fix the vacuum adsorption device on the mechanical arm of the three-axis translation stage, use the vacuum adsorption device to adsorb the polymer spherical cap, adjust the movement of the mechanical arm of the three-axis translation stage according to the images of the polymer spherical cap in the X, Y, and Z directions, and assemble the polymer spherical cap into one of the compression cones; The support frame is driven to flip horizontally 180 degrees by a three-axis translation stage, and the polymer spherical cap is assembled into the other compression cone in the same way as the polymer spherical cap is assembled into one compression cone; The support frame is irradiated with a curing light source to cure the glue at the glue-dotting position on the inner wall of the compression cone.

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