CN112941301A - Device and method for strengthening ship body through laser shock - Google Patents
Device and method for strengthening ship body through laser shock Download PDFInfo
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- CN112941301A CN112941301A CN202110213945.1A CN202110213945A CN112941301A CN 112941301 A CN112941301 A CN 112941301A CN 202110213945 A CN202110213945 A CN 202110213945A CN 112941301 A CN112941301 A CN 112941301A
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- Prior art keywords
- focusing
- rotating column
- laser
- tube
- ship body
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
Abstract
The invention relates to a method for strengthening a ship body by laser shock, which comprises the following steps of firstly, adsorbing a carrying device (1) on the surface of the ship body to be strengthened; adjusting the steering pipe (23) and the focusing pipe (24) to enable the focusing pipe (24) to be vertical to the surface of the ship body with the strengthening function; the paint spraying nozzle (43) sprays black paint on the surface of the substrate to form an absorption layer; the water spray nozzle (46) sprays water to the absorption layer to form a restraint layer; finally, the position of the guide rod group and the angle of a reflector (29) in each movable joint are adjusted, so that parallel laser beams expanded by a beam expander (32) pass through the reflector (29), reach the focusing tube (24) along the guide rod (22) and the steering tube (23), and are focused on the absorption layer under the action of the perspective mirror (210) to generate laser impact and strengthen the matrix. The invention has the advantages of portable and small structure, wide application range, strengthened hull structure and stronger impact resistance.
Description
Technical Field
The invention relates to the technical field of laser shock peening, in particular to a device and a method for strengthening a ship body by laser shock.
Background
With the development of ship technology, the strength requirement on the ship body is greatly improved. For example, the hull of an icebreaker needs to be subjected to a large amount of impact, and the surface of the hull needs to be made of higher-strength steel. The ice breaker is a service ship for breaking ice layer on water surface, opening up navigation channel, ensuring ship to pass in and out of ice-sealed port and anchor, or guiding ship to sail in ice area, and is mainly divided into river, lake, harbor or ocean ice breaker. The ship body is short and wide, the ratio of length to width is small, the bottom is upwarped from head to tail, the head column is sharp and inclined forward, the overall strength is high, and the head, the tail and a waterline area are reinforced by thick steel plates and dense frameworks. The propulsion system mainly adopts a double-shaft or more-than-double-shaft multi-propeller device and adopts a diesel engine as motive power for propulsion. The propeller and the rudder are protected and strengthened. In the case of ice breaking, the head crushing ice layer continuously breaks ice or repeatedly bursts into ice during travel, and thus, the strength and impact resistance thereof are required to be very high.
The laser shock strengthening technology is a high and new technology for improving the fatigue resistance, wear resistance and corrosion resistance of metal materials by using plasma shock waves generated by strong laser beams. It has the outstanding advantages of non-contact, no heat affected zone, strong controllability, obvious strengthening effect, etc. The coating mainly has the functions of protecting a workpiece from being burnt by laser and enhancing the absorption of laser energy, and the coating materials commonly used at present comprise black paint, aluminum foil and the like. The confining layer can not only confine the expansion of plasma and increase the peak pressure of shock wave, but also prolong the action time of shock wave by reflecting the shock wave, and the confining layer commonly used at present is flowing water and K9 glass.
At present, the traditional laser shock peening technology is only suitable for smaller parts, and the laser shock peening can not be realized for large parts similar to the whole ship body.
Disclosure of Invention
The invention aims to solve the problems that the existing icebreaking ship body is low in strength and the strengthening technology is not applicable, and provides a device for strengthening the ship body by laser shock.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for strengthening a ship body by laser shock comprises a group of mutually matched carrying devices, laser guiding devices, generating devices and auxiliary absorbing devices.
The carrying device comprises a chassis, tires are respectively connected to four corners of the chassis, and a group of magnets are arranged inside the chassis and used for adsorbing the carrying device on the surface of the ship body to be strengthened.
The laser guide device comprises a first rotating column vertically connected with the chassis, the upper end of the first rotating column is connected with a second rotating column, the second rotating column is connected with a group of guide rods, the first rotating column is connected with a steering tube, and the steering tube is connected with a focusing tube;
a first movable joint is arranged at the joint between every two adjacent guide rods, a second movable joint is arranged at the joint between each guide rod and the corresponding second rotating column, a third movable joint is arranged at the joint between each first rotating column and the corresponding steering pipe, and a fourth movable joint is arranged at the joint between each steering pipe and the corresponding focusing pipe;
the first movable joint, the second movable joint, the third movable joint and the fourth movable joint are internally provided with a reflector respectively, a transmission mirror is arranged in the focusing tube and is perpendicular to the axis of the focusing tube, and the first rotating column, the second rotating column and the guide rod are all of hollow tubular structures so as to facilitate the light beam to pass through.
The generating device comprises a laser generator and a beam expander, the transmitting end of the laser generator is connected with the beam expander, and the outlet end of the beam expander faces the inlet end of the guide rod and is used for expanding the laser beam into parallel beams through the beam expander and then inputting the parallel beams into the guide rod.
Further, the auxiliary absorption device comprises a black paint box, an outlet of the black paint box is connected with a first hose, an outlet end of the first hose is connected with a paint spraying nozzle, the paint spraying nozzle is connected to one side of the focusing pipe, and a nozzle direction of the paint spraying nozzle is parallel to an axis of the focusing pipe and used for spraying black paint to the surface of the ship body to form an absorption layer.
Furthermore, the auxiliary absorption device also comprises a water tank, an outlet of the water tank is connected with a second hose through a pump, an outlet end of the second hose is connected with a water spray nozzle, the water spray nozzle is connected to the other side of the focusing pipe, and the spraying direction of the water spray nozzle is arranged opposite to the focusing direction of the focusing pipe so as to spray water onto the absorption layer to form the restraint layer.
Further, the spraying direction of the water nozzle and the focusing direction of the focusing pipe are intersected at one point of the surface of the ship body to be strengthened.
Further, the first rotating column and the second rotating column can rotate around the direction perpendicular to the chassis.
The carrying device used by the invention is internally provided with a driving component which can control the tire to rotate so as to drive the whole device to move on the surface of the ship body, and the driving component can be connected with an external controller so as to achieve the effect of automatic intelligent control.
The movable joint and the reflector are provided with stepping motors which can drive the movable joint and the reflector to move so as to drive the guide rod, the steering tube and the focusing tube to move, the reflector can adjust the angle of the reflector along with the movement of the tube, and the stepping motors can be connected with an external controller so as to achieve the effect of automatic intelligent control.
In order to further achieve the purpose of the invention, the invention also provides a method for strengthening the hull by laser shock, wherein the device comprises a carrying device, a laser guiding device, a generating device and an auxiliary absorbing device, and the method comprises the following specific steps:
(1) the carrying device is adsorbed on the surface of the ship body to be strengthened through a magnet arranged in the chassis;
(2) controlling the steering tube and the focusing tube so that the focusing tube is perpendicular to the surface of the reinforced hull;
(3) spraying black paint on the surface of the base body by a paint spraying nozzle, and forming an absorption layer on the surface of the ship body to be strengthened;
(4) the carrying device drives the whole body to move forward, so that the transmission mirror in the focusing tube is opposite to the absorption layer;
(5) the water spray nozzle sprays water to the absorption layer to form a restraint layer on the surface of the reinforced ship body;
(6) the position of the guide rod group and the angle of the reflector in each movable joint are adjusted, so that parallel laser beams expanded by the beam expander pass through the reflector, reach the inside of the focusing tube along the guide rod and the steering tube, and are focused on the absorption layer under the action of the perspective mirror to generate laser impact and strengthen the matrix.
According to the technical scheme, the laser beams are guided through the group of direction-changeable tubular structures, are guided into the focusing pipe and move on the surface of the ship body with the strengthening function under the driving of the carrying device, so that the ship body can be strengthened along with the path of the carrying device, and meanwhile, the paint spraying nozzle and the water spraying nozzle which are used for assisting in strengthening are arranged.
Drawings
FIG. 1 is a schematic structural diagram of a laser shock peening apparatus of a hull of a vessel according to the present invention;
FIG. 2 is a schematic diagram of the internal structure of a laser shock peening apparatus of a hull of the present invention;
FIG. 3 is a first example of the freedom of movement of the column, guide rod, steering tube and focusing tube of the present invention;
FIG. 4 is a second example of freedom of movement of the column, guide rod, steering tube and focusing tube of the present invention;
FIG. 5 is a third exemplary degree of freedom of movement of the column, guide rod, steering tube and focusing tube of the present invention;
fig. 6 is a state diagram of the laser shock peening apparatus of the present invention in operation.
Detailed Description
Example 1
In order to make the present invention more clear, the following is a further description of the apparatus and method for laser shock peening a hull of a ship in accordance with the present invention, and the embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
Referring to fig. 1 and 2, a device for laser shock peening of a hull is characterized in that:
comprises a group of mutually matched carrying devices 1, laser guiding devices 2, generating devices 3 and auxiliary absorbing devices 4;
the carrying device 1 comprises a chassis 11, wherein tires 12 are respectively connected to four corners of the chassis 11, and a group of magnets 13 are arranged inside the chassis 11 and used for adsorbing the carrying device on the surface of a ship body to be strengthened;
the laser guide device 2 comprises a first rotating column 20 vertically connected with the chassis 11, the upper end of the first rotating column 20 is connected with a second rotating column 21, the first rotating column 20 and the second rotating column 21 can rotate around the direction vertical to the chassis 11, the second rotating column 21 is connected with a group of guide rods 22, the first rotating column 20 is connected with a steering pipe 23, and the steering pipe 23 is connected with a focusing pipe 24;
a first movable joint 25 is arranged at the joint between every two adjacent guide rods 22, a second movable joint 26 is arranged at the joint between each guide rod 22 and the corresponding second rotating column 21, a third movable joint 27 is arranged at the joint between each first rotating column 20 and the corresponding steering tube 23, and a fourth movable joint 28 is arranged at the joint between each steering tube 23 and the corresponding focusing tube 24;
a reflector 29 is respectively arranged in the first movable joint 25, the second movable joint 26, the third movable joint 27 and the fourth movable joint 28, a transmission mirror 210 is arranged in the focusing tube 24, the transmission mirror 210 is perpendicular to the axis of the focusing tube 24, and the first rotating column 20, the second rotating column 21 and the guide rod 22 are all hollow tubular structures so as to facilitate the light beams to pass through;
the generating device 3 comprises a laser generator 31 and a beam expander 32, wherein the emission end of the laser generator 31 is connected with the beam expander 32, and the outlet end of the beam expander 32 is arranged opposite to the inlet end of the guide rod 22, so that the laser beam is expanded into parallel beams by the beam expander and then is input into the guide rod;
the auxiliary absorption device 4 comprises a black paint box 41 and a water tank 44, wherein the outlet of the black paint box 41 is connected with a first hose 42, the outlet end of the first hose 42 is connected with a paint spraying nozzle 43, the paint spraying nozzle 43 is connected to one side of the focusing pipe 24, and the nozzle direction of the paint spraying nozzle 43 is arranged parallel to the axis of the focusing pipe 24 so as to spray black paint to the surface of the ship body to form an absorption layer;
the outlet of the water tank 44 is connected with a second hose 45 through a pump, the outlet end of the second hose 45 is connected with a water nozzle 46, the water nozzle 46 is connected with the other side of the focusing pipe 24, and the spraying direction of the water nozzle 46 and the focusing direction of the focusing pipe 24 are converged at one point of the surface of the ship body to be strengthened so as to spray water onto the absorption layer to form a constraint layer;
the carrying device 1 used by the invention is internally provided with a driving component, can control the tire 12 to rotate so as to drive the whole device to move on the surface of the ship body, and the driving component can be connected with an external controller so as to achieve the effect of automatic intelligent control.
The movable joint and the reflector are provided with stepping motors which can drive the movable joint and the reflector to move so as to drive the guide rod, the steering tube and the focusing tube to move, the reflector can adjust the angle of the reflector along with the movement of the tube, and the stepping motors can be connected with an external controller so as to achieve the effect of automatic intelligent control.
The method for strengthening the ship body by using the device through laser shock comprises the following specific steps:
(1) the carrying device 1 is absorbed on the surface of the ship body to be strengthened to move through a magnet 13 arranged in the chassis 11;
(2) controlling the steering tube 23 and the focusing tube 24 such that the focusing tube 24 is perpendicular to the surface of the belt-stiffened hull;
(3) the paint spraying nozzle 43 sprays black paint on the surface of the base body to form an absorption layer on the surface of the ship body to be strengthened;
(4) the carrier device 1 drives the whole body to move forward, so that the transmission mirror 210 in the focusing tube 24 is opposite to the absorption layer;
(5) the water spray nozzle 46 sprays water to the absorption layer to form a restraint layer on the surface of the ship body with the reinforcement;
(6) the position of the guide rod group and the angle of the reflecting mirror 29 in each movable joint are adjusted, so that the parallel laser beams expanded by the beam expander 32 pass through the reflecting mirror 29, reach the focusing tube 24 along the guide rod 22 and the steering tube 23, and are focused on the absorption layer under the action of the perspective mirror 210 to generate laser shock and strengthen the matrix.
The device of the invention can strengthen the hull surface of the icebreaker, the trolley is provided with a magnet and can be adsorbed on the hull surface, the hollow rod group is connected with the trolley and the laser generator, a reflector and a transmission mirror are arranged in the hollow rod group, the laser beam emitted by the laser generator can be transmitted to the trolley and focused on the hull surface, and meanwhile, the nozzle is arranged, so that an absorption layer and a restraint layer required by laser impact can be manufactured on the hull surface. The structure is portable and small, the application range is wide, the structure of the ship body is strengthened, and the ship body can bear stronger impact.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (6)
1. A device for strengthening a ship body by laser shock is characterized in that:
comprises a group of mutually matched carrying devices (1), laser guiding devices (2), generating devices (3) and auxiliary absorbing devices (4);
the carrying device (1) comprises a chassis (11), wherein the four corners of the chassis (11) are respectively connected with a tire (12), and a group of magnets (13) are arranged inside the chassis (11);
the laser guide device (2) comprises a first rotating column (20) vertically connected with the chassis (11), the upper end of the first rotating column (20) is connected with a second rotating column (21), the second rotating column (21) is connected with a group of guide rods (22), the first rotating column (20) is connected with a steering pipe (23), and the steering pipe (23) is connected with a focusing pipe (24);
a first movable joint (25) is arranged at the joint between every two adjacent guide rods (22), a second movable joint (26) is arranged at the joint between each guide rod (22) and the corresponding second rotating column (21), a third movable joint (27) is arranged at the joint between each first rotating column (20) and the corresponding steering tube (23), and a fourth movable joint (28) is arranged at the joint between each steering tube (23) and the corresponding focusing tube (24);
a reflector (29) is arranged in each movable joint, a transmission mirror (210) is arranged in each focusing tube (24), the transmission mirror (210) is perpendicular to the axis of the focusing tube (24), and the first rotating column (20), the second rotating column (21) and the guide rod (22) are all of hollow tubular structures;
the generating device (3) comprises a laser generator (31) and a beam expander (32), the transmitting end of the laser generator (31) is connected with the beam expander (32), and the outlet end of the beam expander (32) is arranged opposite to the inlet end of the guide rod (22).
2. The apparatus for laser shock peening a hull according to claim 1, wherein:
the auxiliary absorption device (4) comprises a black paint box (41), an outlet of the black paint box (41) is connected with a first hose (42), an outlet end of the first hose (42) is connected with a paint spraying nozzle (43), the paint spraying nozzle (43) is connected to one side of the focusing pipe (24), and the nozzle direction of the paint spraying nozzle (43) is parallel to the axis of the focusing pipe (24).
3. The apparatus for laser shock peening a hull according to claim 2, wherein:
the auxiliary absorption device (4) further comprises a water tank (44), the outlet of the water tank (44) is connected with a second hose (45) through a pump, the outlet end of the second hose (45) is connected with a water spray nozzle (46), the water spray nozzle (46) is connected to the other side of the focusing pipe (24), and the spraying direction of the water spray nozzle (46) is arranged opposite to the focusing direction of the focusing pipe (24).
4. The apparatus for laser shock peening a hull according to claim 3, wherein:
the direction of the jet of the nozzle (46) and the direction of the focus of the focusing tube (24) meet at a point on the surface of the hull to be reinforced.
5. The device for laser shock peening of a hull according to any one of claims 1 to 4, wherein:
the first rotating column (20) and the second rotating column (21) can rotate around the direction vertical to the chassis (11).
6. A method of laser shock peening a hull using the apparatus of claim 1, comprising the steps of:
the method comprises the following steps: the carrying device (1) is adsorbed on the surface of the ship body to be strengthened through a magnet (13) arranged in the chassis (11);
step two: controlling the steering tube (23) and the focusing tube (24) such that the focusing tube (24) is perpendicular to the surface of the hull with the reinforcement;
step three: the paint spraying nozzle (43) sprays black paint on the surface of the base body to form an absorption layer on the surface of the ship body to be strengthened;
step four: the carrying device (1) drives the whole body to move forward, so that the transmission mirror in the focusing tube (24) is opposite to the absorption layer;
step five: the water spray nozzle (46) sprays water to the absorption layer to form a restraint layer on the surface of the reinforced ship body;
step six: the position of the guide rod group and the angle of a reflector (29) in each movable joint are adjusted, so that parallel laser beams expanded by a beam expander (32) pass through the reflector (29), reach the focusing tube (24) along the guide rod (22) and the steering tube (23), and are focused on the absorption layer under the action of the perspective mirror (210) to generate laser impact and strengthen the matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110213945.1A CN112941301A (en) | 2021-02-26 | 2021-02-26 | Device and method for strengthening ship body through laser shock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110213945.1A CN112941301A (en) | 2021-02-26 | 2021-02-26 | Device and method for strengthening ship body through laser shock |
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| Publication Number | Publication Date |
|---|---|
| CN112941301A true CN112941301A (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110213945.1A Pending CN112941301A (en) | 2021-02-26 | 2021-02-26 | Device and method for strengthening ship body through laser shock |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202322907U (en) * | 2011-11-15 | 2012-07-11 | 安阳市睿恒数控机床有限公司 | Device for carrying out laser heat treatment on machine tool body |
| CN205329107U (en) * | 2015-12-17 | 2016-06-22 | 南京中科煜宸激光技术有限公司 | Movable laser hardening device |
| CN106929663A (en) * | 2017-03-31 | 2017-07-07 | 江苏大学 | May move online laser shocking processing apparatus and method |
| CN110216372A (en) * | 2019-05-16 | 2019-09-10 | 广东镭奔激光科技有限公司 | Guiding device in laser impact intensified robot |
| CN112251595A (en) * | 2020-08-31 | 2021-01-22 | 章海生 | Laser shot blasting composite rolling strengthening device for revolving body |
-
2021
- 2021-02-26 CN CN202110213945.1A patent/CN112941301A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202322907U (en) * | 2011-11-15 | 2012-07-11 | 安阳市睿恒数控机床有限公司 | Device for carrying out laser heat treatment on machine tool body |
| CN205329107U (en) * | 2015-12-17 | 2016-06-22 | 南京中科煜宸激光技术有限公司 | Movable laser hardening device |
| CN106929663A (en) * | 2017-03-31 | 2017-07-07 | 江苏大学 | May move online laser shocking processing apparatus and method |
| CN110216372A (en) * | 2019-05-16 | 2019-09-10 | 广东镭奔激光科技有限公司 | Guiding device in laser impact intensified robot |
| CN112251595A (en) * | 2020-08-31 | 2021-01-22 | 章海生 | Laser shot blasting composite rolling strengthening device for revolving body |
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Application publication date: 20210611 |