CN109234517B - Laser shot blasting device of hydrogen storage bottle and manufacturing method thereof - Google Patents
Laser shot blasting device of hydrogen storage bottle and manufacturing method thereof Download PDFInfo
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- CN109234517B CN109234517B CN201811095730.9A CN201811095730A CN109234517B CN 109234517 B CN109234517 B CN 109234517B CN 201811095730 A CN201811095730 A CN 201811095730A CN 109234517 B CN109234517 B CN 109234517B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
- C21D10/005—Modifying the physical properties by methods other than heat treatment or deformation by laser shock processing
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Abstract
The invention provides a laser shot blasting device of a hydrogen storage bottle, which comprises a laser emitting device and a water spraying device; the laser emitting device is used for generating laser beams which are used for being emitted into a part to be bent of the cylinder body of the hydrogen storage bottle; the water spray device is used for generating a water flow beam, and the water flow beam is used for injecting into the surface of the injection point accessory of the laser beam; the water flow beam and the laser beam do rotary motion relative to the cylinder axis of the hydrogen storage bottle; the cylinder body of the hydrogen storage bottle is fixedly arranged; the laser emitting device generates a laser beam rotating around the axis of the cylinder of the hydrogen storage bottle; the water spray device produces a stream of water that rotates about the axis of the cylinder of the hydrogen storage cylinder. The method utilizes the dynamic response process of laser impact on the target material and the rebound process after high-speed impact to induce the residual surface compressive stress to inhibit the propagation of hydrogen induced cracks in a high-pressure hydrogen environment.
Description
Technical Field
The invention relates to the field of hydrogen storage bottle manufacturing or revolving body laser shot blasting, in particular to a laser shot blasting device of a hydrogen storage bottle and a manufacturing method thereof.
Background
The hydrogen energy has the advantages of abundant reserves, renewability, storage and transportation and the like, is widely applied to industries such as automobiles, aviation, ships and the like as a first choice of novel clean energy, and has important strategic significance for solving two problems of energy shortage and environmental pollution which restrict the global economic development at present. The high-pressure hydrogen storage mode is the predominant hydrogen storage mode at present due to the advantages of simple equipment structure, low energy consumption for preparing compressed hydrogen and the like, wherein a high-pressure hydrogen storage container such as a hydrogen storage bottle is key equipment of a high-pressure hydrogen storage system. However, when a metal material commonly used for the hydrogen equipment works for a long time in a high-pressure gaseous hydrogen environment, the phenomena of plasticity reduction and crack propagation rate acceleration high-pressure hydrogen embrittlement occur, and the critical structural part fails early in the service period.
Aiming at the problems of hydrogen embrittlement resistance and service life extension of common metal materials of hydrogen equipment, scholars at home and abroad mainly carry out related research from two aspects: firstly, a special coating is prepared on the surface of a metal material to prevent the hydrogen permeation behavior, and secondly, the traditional surface deformation modification process is adopted to inhibit the absorption of the material to hydrogen. For example, the domestic invention patent provides a hydrogen embrittlement-resistant and sulfidation corrosion-resistant thermocouple special for hydrocracking, and then a protective layer is prepared on the surface of the thermocouple to achieve a better hydrogen embrittlement-resistant effect. However, the long-term service of the key structural member of the hydrogen storage bottle in a high-pressure hydrogen storage environment and the alternating pressure of hydrogen charging and discharging can reduce the bonding strength between the surface coating and the substrate, the corrosion failure process of the block is added, and the preparation of the coating on the inner surface of the hydrogen storage bottle can affect the purity of hydrogen. For example, as described in japanese journal literature, hydrogen embrittlement in stainless steel is prevented by cavitation shot-peening-induced surface residual compressive stress, which proves that the compressive residual stress caused by cavitation shot peening can reduce hydrogen erosion on the surface of austenitic stainless steel, but the conventional processes such as mechanical shot peening and cavitation jet shot peening tend to increase the roughness of the treated surface, thereby promoting hydrogen adsorption and weakening the strengthening effect.
In recent years, the cross-development of optothermal discipline, especially the application of laser and material interaction to generate heat and force effect, attracts wide attention. Among them, Laser Peening-LP (Laser Peening-LP) technology has been applied to the research of corrosion resistance, hydrogen embrittlement resistance, fatigue resistance, etc. of metal parts as a novel and high quality surface modification process. However, many studies at present focus on the hydrogen embrittlement resistance of metal materials and standard mechanical samples thereof, but the research results of the standard mechanical samples applied to actual engineering components often have certain deviation.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a laser shot blasting device of a hydrogen storage bottle and a manufacturing method thereof, which can improve the hydrogen brittleness resistance of the key structure part of the hydrogen storage bottle and prolong the service life of the hydrogen storage bottle by combining a laser shot blasting strengthening material process and a hydrogen storage bottle production process. The invention provides a method and a device for hydrogen storage bottle which is most prone to hydrogen embrittlement failure at a bent part, wherein in the manufacturing process of the hydrogen storage bottle, metal is melted and rolled into a seamless cylindrical barrel, and then a bending process is carried out.
The present invention achieves the above-described object by the following technical means.
A laser shot-blasting device of hydrogen storage bottle comprises a laser emitting device and a water spraying device; the laser emitting device is used for generating laser beams which are used for being emitted into a part to be bent of the cylinder body of the hydrogen storage bottle;
the water spray device is used for generating a water flow beam, and the water flow beam is used for injecting into the surface of the injection point accessory of the laser beam;
the water flow beam and the laser beam both rotate relative to the axis of the cylinder of the hydrogen storage bottle.
Further, the cylinder body of the hydrogen storage bottle is fixedly installed; the laser emitting device generates a laser beam rotating around the axis of the cylinder of the hydrogen storage bottle; the water spray device produces a stream of water that rotates about the axis of the cylinder of the hydrogen storage cylinder.
Further, the water spraying device comprises a spray head and a rod; the rod extends into the cylinder body of the hydrogen storage bottle, and one end of the rod is connected with a rotating motor; the spray head is arranged on the rod and is used for generating a water flow beam; the laser emitting device comprises a fixed point mirror, a focusing mirror and a laser; the focusing mirror is arranged at the other end of the rod, and the laser beam emitted by the laser is focused on the inner wall of the cylinder body of the hydrogen storage bottle by the fixed point mirror and the focusing mirror.
Further, the hydrogen storage bottle cylinder body is supported by a roller carrier, and the roller carrier is used for enabling the hydrogen storage bottle cylinder body to generate self-rotation movement. The water spraying device comprises a spray head and a rod; the rod extends into the cylinder body of the hydrogen storage bottle, the spray head is arranged on the rod, and the spray head is used for generating a water flow beam; the laser emitting device comprises a fixed point mirror, a focusing mirror and a laser; the focusing mirror is arranged on the rod, and the laser beam emitted by the laser is focused on the inner wall of the cylinder body of the hydrogen storage bottle by the fixed point mirror and the focusing mirror.
Further, a platform is also included; the platform is provided with a rod for moving the rod axially and radially along the cylinder of the hydrogen storage bottle.
Further, the water tank is also included; the water tanks are positioned at two ends of the cylinder body of the hydrogen storage bottle and are used for recovering water flow beams.
A method for manufacturing a hydrogen storage bottle comprises the following steps: manufacturing the cylinder body of the hydrogen storage bottle; laser shot blasting is carried out on the part to be bent of the cylinder body of the hydrogen storage bottle; the cylinder body of the hydrogen storage bottle is bent and formed.
Further, the laser shot blasting of the part to be bent of the cylinder body of the hydrogen storage bottle specifically comprises the following steps:
a protective layer is arranged at the part to be bent of the cylinder body of the hydrogen storage bottle;
covering the part to be bent by water flow generated by the spray head to form a constraint layer;
laser shot blasting treatment: setting laser parameters, starting the laser, and enabling the water flow beam and the laser beam to do rotary motion relative to the cylinder axis of the hydrogen storage cylinder through a control system; and carrying out laser shot blasting treatment on the part to be bent of the cylinder body of the hydrogen storage bottle.
Further, the protective layer is an aluminum foil, and the thickness of the aluminum foil is at least 100 μm; the thickness of the restraint layer is 1-2 mm.
The invention has the beneficial effects that:
1. according to the manufacturing method of the hydrogen storage bottle, laser shot blasting is carried out on the key structure part of the hydrogen storage bottle when the hydrogen storage bottle is not subjected to a bending process, and the expansion of hydrogen induced cracks under a high-pressure hydrogen environment is inhibited by utilizing the dynamic response process of laser impact on the target material and the rebound process after high-speed impact to induce the surface residual compressive stress.
2. According to the manufacturing method of the hydrogen storage bottle, hydrogen invasion on the treated surface can be strongly inhibited through high-density dislocation and refined crystal grains induced by laser shot blasting, so that the hydrogen brittleness resistance of the whole hydrogen storage tank is improved, and the service life of the hydrogen storage tank is further prolonged.
3. The laser shot blasting device of the hydrogen storage bottle provided by the invention achieves the expected effect of a circumferential light path under the condition of not influencing the laser effect by rotating the water flow beam and the laser beam relative to the axis of the cylinder of the hydrogen storage bottle, and meets the processing requirement of the circumferential inner wall of the cylinder.
4. The invention perfectly combines the laser shot blasting process with the hydrogen storage bottle manufacturing process, and if the hydrogen storage bottle is put into use for a long time, the service life of the hydrogen storage bottle in a high-pressure hydrogen-contacting environment can be greatly prolonged, thereby saving the cost and drawing a thick ink with heavy color for the development of the hydrogen energy industry.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a plan view of the hydrogen storage cylinder according to the present invention after the cylinder is formed.
In the figure:
1-a computer; 2-a laser; 3-fixed point mirror; 4-lifting a rotating rod; 5-a spray head; 6-hard tube; 7-a focusing mirror; 8-aluminum foil; 9-a rod; 10-hydrogen storage cylinder body; 11-a coupling; 12-a rotating electrical machine; 13-a platform; 14-big water tank; 15-adjustable water pump; 16-a water tank; 17-the part to be bent; 18-a support frame; 19-a roller frame; 20-bend.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Example 1
As shown in figure 1, the laser shot-blasting device of the hydrogen storage bottle of the invention, the cylinder body 10 of the hydrogen storage bottle is fixedly arranged by a support frame 18, the support frame 18 is similar to a V-shaped block structure, and the water spraying device comprises a spray head 5 and a rod 9; the rod 9 extends into the cylinder body 10 of the hydrogen storage bottle, and one end of the rod 9 is connected with a rotating motor 12; the spray head 5 is fixed on the rod 9 through the combination of the hard pipe 6 and the hose, and the spray head 5 is connected with the pressure-adjustable water pump 15 through a rotary joint and is used for generating water flow beams; the pressure-adjustable water pump 15 is communicated with the large water tank 14; the laser emitting device comprises a fixed point mirror 3, a focusing mirror 7 and a laser 2; the focusing mirror 7 is arranged at the other end of the rod 9, and the laser beam emitted by the laser 2 is focused on the inner wall of the cylinder 10 of the hydrogen storage bottle by the fixed point mirror 3 and the focusing mirror 7. A lifting rotating rod 4 is arranged below the fixed point mirror 3; the platform 13 is provided with a rotary motor 12, and the rotary motor 12 is provided with a rod 9 through a coupling 11 for moving the rod 9 in the axial and radial directions of the hydrogen storage cylinder 10. As shown in fig. 1, the stage 13 is movable in XYZ three directions, and the bottom of the rotation motor 12 is mounted on the stage 13. In embodiment 1, the cylinder 10 of the hydrogen storage bottle is fixed, and the rod 9 drives the nozzle 5 and the focusing mirror 7 to rotate around the axis of the cylinder 10 of the hydrogen storage bottle. Water tanks 16 are located at both ends of the hydrogen storage cylinder 10 for recovering the water streams. The water tank 16 communicates with the large water tank 14.
Taking the cylinder material of the hydrogen storage cylinder as austenitic stainless steel 316L as an example, the specific steps and parameters are as follows:
the specific steps of the above example 1 are as follows:
1. manufacturing a cylinder body 10 of the hydrogen storage bottle;
2. the cylinder body 10 of the hydrogen storage bottle is fixedly installed through a support frame 18, and water tanks 16 are arranged at two ends of the cylinder body 10 of the hydrogen storage bottle; a layer of aluminum foil 8 is adhered on the part 17 to be bent, the thickness of the aluminum foil 8 is 100 mu m, and the height of the liftable rotating rod 4 below the fixed point mirror 3 is adjusted to be flush with the central axis of the cylinder 10 of the hydrogen storage bottle;
3. one end of the rod 9 is connected with a rotating motor 12 through a coupler 11; the focusing mirror 7 is welded at the other end of the rod 9;
4. the focusing mirror 7, the rod 9, the coupling 11 and the spray head are integrated and connected with a rotating motor 12, when the rotating motor 12 rotates, the speed is converted by the coupling 11, the integrated body rotates synchronously with the rotating motor 12, wherein the rotating motor 12 is arranged on a platform 13 which can move in X, Y, Z three directions;
5. adjusting the position of the platform 13 to make the center of the focusing mirror 7 flush with the center of the fixed point mirror 3, wherein the water outlet of the spray head 5 can cover the part 17 to be bent, and slightly adjusting the position of the water tank 16 to recover the water sprayed by the spray head 5;
6. the water outlet of the spray head 5 covers the part 17 to be bent to form a restraint layer, the thickness of the restraint layer is about 1-2mm, and the initial water outlet speed of the spray head 5 is 4L/min; when the water is rotated to a high position, the pressure-adjustable water pump 15 is adjusted to be properly pressurized in consideration of the gravity problem, and the water outlet speed of the spray head 5 is 8L/min;
7. starting the laser 2, adjusting the laser, and setting the parameters as follows: laser energy of 10J, spot diameter of 4mm, overlapping rate of 50%, repetition rate of 20khz and other parameters, and performing laser shot blasting on the part to be bent 17;
8. laser peening processing is started from the leftmost area, the rotating motor 12 drives the rod 9 to move at a uniform angular speed through the coupler 11 and is responsible for circular motion of a light path, the platform 13 intermittently moves along the X-axis in the positive direction, the gap period is 20s, and the moving distance is 2mm each time.
9. When the left-end to-be-processed area is completely processed, the laser 2 is firstly closed, the platform 13 is moved along the X-axis direction until the center of the focusing mirror 7 is flush with the rightmost side of the right-end to-be-bent part 17 in the Z-axis direction, the laser 2 is started to start laser shot blasting, and the movement rule is consistent with the movement rule.
10. After all the treatment is finished, firstly, the laser 2 is closed, then the pressure-adjustable water pump 15 and the rotating motor 12 are closed, and finally, the platform 13 is moved along the positive direction of the X axis until the focusing mirror 7 is separated from the cylinder body 10 of the hydrogen storage bottle.
11. As shown in fig. 3, the processed hydrogen storage cylinder 10 is subjected to bending processing. The bent portion 20 of the molded hydrogen storage cylinder is in conformity with the portion to be bent 17.
Example 2:
as shown in fig. 2, the hydrogen storage cylinder 10 is supported by a roller frame 19, and the roller frame 19 is used to generate a self-rotating motion of the hydrogen storage cylinder 10. The water spraying device comprises a spray head 5 and a rod 9; the rod 9 extends into the hydrogen storage cylinder body 10, the spray head 5 is arranged on the rod 9, and the spray head 5 is used for generating a water flow beam; the laser emitting device comprises a fixed point mirror 3, a focusing mirror 7 and a laser 2; the focusing mirror 7 is arranged on the rod 9, and the laser beam emitted by the laser 2 is focused on the inner wall of the cylinder 10 of the hydrogen storage bottle by the fixed point mirror 3 and the focusing mirror 7. A lifting rotating rod 4 is arranged below the fixed point mirror 3; the platform 13 is provided with a rod 9 for moving the rod 9 axially along the cylinder 10 of the hydrogen storage cylinder. As shown in fig. 2, the stage 13 is movable in XYZ three directions, and the stage 13 may be mounted on the shaft 9. In example 2, the hydrogen storage cylinder 10 is self-transmitting, and the rod 9, the nozzle 5 and the focusing mirror 7 are located at the axis of the hydrogen storage cylinder 10. Water tanks 16 are located at both ends of the hydrogen storage cylinder 10 for recovering the water streams. The water tank 16 communicates with the large water tank 14.
The procedure of example 2 is substantially the same as that of example 1, except that the hydrogen storage cylinder 10 of example 2 is self-transmitting, and the rod 9, the nozzle 5 and the focusing mirror 7 are horizontally moved along the axis of the hydrogen storage cylinder 10.
In addition, the computer 1 of the present invention can control the laser 2, the elevation rotation bar 4, the rotation motor 12, the platform 13, and the roller frame 19.
In addition, the rod 9 can be a hollow pipe, a water stream can be introduced into the hollow pipe, and a spray head 5 is installed at one end of the hollow pipe.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (8)
1. A laser shot-blasting device of a hydrogen storage bottle is characterized by comprising a laser emitting device and a water spraying device; the laser emitting device is used for generating laser beams, and the laser beams are used for being emitted into a part (17) to be bent on the inner side of the hydrogen storage bottle barrel (10);
the water spray device is used for generating a water flow beam which is used for injecting into the surface near the injection point of the laser beam;
the water flow beam and the laser beam both do rotary motion relative to the axis of the cylinder body (10) of the hydrogen storage bottle; the laser emitting device generates a laser beam rotating around the axis of the cylinder body (10) of the hydrogen storage bottle; the water spray device generates a water stream rotating about the axis of the hydrogen storage cylinder (10).
2. The laser peening apparatus for hydrogen storage bottles of claim 1, wherein said water spraying means comprises a nozzle (5) and a rod (9); the rod (9) extends into the cylinder body (10) of the hydrogen storage bottle, and one end of the rod (9) is connected with a rotating motor (12); the spray head (5) is arranged on the rod (9), and the spray head (5) is used for generating a water flow beam; the laser emitting device comprises a fixed point mirror (3), a focusing mirror (7) and a laser (2); the focusing mirror (7) is arranged at the other end of the rod (9), and the laser beam emitted by the laser (2) is focused on the inner wall of the hydrogen storage bottle cylinder (10) through the fixed point mirror (3) and the focusing mirror (7).
3. The laser peening apparatus for hydrogen storage bottles of claim 1, wherein said hydrogen storage bottle barrel (10) is supported by a roller frame (19), said roller frame (19) being used to impart a self-rotating motion to said hydrogen storage bottle barrel (10); the water spraying device comprises a spray head (5) and a rod (9); the rod (9) extends into the hydrogen storage cylinder body (10), the spray head (5) is arranged on the rod (9), and the spray head (5) is used for generating a water flow beam; the laser emitting device comprises a fixed point mirror (3), a focusing mirror (7) and a laser (2); the focusing mirror (7) is arranged on the rod (9), and the laser beam emitted by the laser (2) is focused on the inner wall of the hydrogen storage bottle cylinder body (10) through the fixed point mirror (3) and the focusing mirror (7).
4. The laser peening apparatus for hydrogen storage cylinders according to claim 2 or 3, further comprising a platform (13); the platform (13) is provided with a rod (9) for moving the rod (9) along the cylinder body (10) of the hydrogen storage bottle in the axial direction and the radial direction.
5. The laser peening apparatus for hydrogen storage bottles of claim 2 or 3, further comprising a water tank (16); the water tanks (16) are located at both ends of the hydrogen storage cylinder (10) for recovering the water streams.
6. The method for manufacturing the hydrogen storage bottle is characterized by comprising the following steps of: manufacturing the hydrogen storage cylinder body (10); the laser peening apparatus for hydrogen storage cylinder according to claim 2 or 3 laser peening a portion (17) to be bent of a cylinder (10) of the hydrogen storage cylinder; the hydrogen storage cylinder body (10) is formed by bending.
7. The method for producing a hydrogen storage cylinder according to claim 6, wherein the laser peening of the portion (17) to be bent of the cylinder (10) of the hydrogen storage cylinder is specifically:
a protective layer is arranged on a part (17) to be bent of the cylinder body (10) of the hydrogen storage bottle;
the water flow generated by the spray head (5) covers the part (17) to be bent to form a restraint layer;
laser shot blasting treatment: setting parameters of the laser (2), starting the laser (2), and enabling the water flow beams and the laser beams to do rotary motion relative to the axis of the cylinder body (10) of the hydrogen storage bottle through a control system; the part (17) to be bent of the cylinder (10) of the hydrogen storage bottle is subjected to laser peening.
8. The method of claim 7, wherein the protective layer is an aluminum foil (8), the aluminum foil (8) having a thickness of at least 100 μm; the thickness of the restraint layer is 1-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811095730.9A CN109234517B (en) | 2018-09-19 | 2018-09-19 | Laser shot blasting device of hydrogen storage bottle and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811095730.9A CN109234517B (en) | 2018-09-19 | 2018-09-19 | Laser shot blasting device of hydrogen storage bottle and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN109234517A CN109234517A (en) | 2019-01-18 |
| CN109234517B true CN109234517B (en) | 2020-06-26 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040224179A1 (en) * | 2003-05-09 | 2004-11-11 | Lsp Technologies, Inc. | Laser peening method and apparatus using tailored laser beam spot sizes |
| CN102925646B (en) * | 2012-11-14 | 2014-04-09 | 江苏大学 | Method and device of shot peening for surface of metal component by means of light-water complex |
| CN108262563B (en) * | 2016-12-30 | 2023-10-24 | 宁波大艾激光科技有限公司 | Follow-up laser shock peening device and method |
| CN107475508B (en) * | 2017-08-10 | 2018-08-14 | 江苏大学 | A kind of method and device that the compound finish rolling hardening surface of laser peening is modified |
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