CN114850138A - Laser cleaning device and method for inner wall of solid rocket engine shell - Google Patents
Laser cleaning device and method for inner wall of solid rocket engine shell Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
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Abstract
The invention relates to a laser cleaning device and method for the inner wall of a shell of a solid rocket engine, and belongs to the technical field of rockets. The device comprises a laser system, a focus-adjustable rotary laser cleaning head, an engine shell supporting and moving mechanism, an air suction system and a software control system. Laser beams enter the focus-adjustable rotary laser cleaning head through the laser system, then after the laser beams are focused by a focusing lens in the laser cleaning head and reflected by a reflector, focusing light spots are projected on the inner wall of a shell of the engine, and a rotary motor in the laser cleaning head drives the reflector at the rear end to rotate together. The laser and the motor shell movement mechanism are regulated and controlled by the software control system, so that the inner wall of the shell can be cleaned by the ultrafast laser. According to the safety particularity of the rocket engine, the ultrafast pulse laser similar to cold processing is selected as a cutter for removing residues on the inner wall of the shell of the solid rocket engine, so that safe, efficient, high-precision and green environmental-friendly cleaning is realized.
Description
Technical Field
The invention belongs to the technical field of rockets, and relates to a laser cleaning device and method for an inner wall of a shell of a solid rocket engine.
Background
The recycling of the solid rocket engine shell can greatly shorten the production period and reduce the production cost.
Therefore, the recycled housing needs to be thoroughly cleaned of its internal residues for reuse. The traditional method mainly adopts a chemical soaking mode or a manual mechanical membrane removal mode to clean. Chemical soaking can bring a great deal of pollution and is not environment-friendly. The manual mechanical membrane removal method also has a number of disadvantages: firstly, the effect is not good enough, the residual material with elasticity is difficult to clean by adopting a mechanical mode, and the base material is easy to damage; secondly, the precision is not high, the manual membrane removing mode is difficult to accurately control, and the operation can be carried out only by the experience of a person; thirdly, the efficiency is low, the combustion chamber space of a small solid rocket engine is narrow, manual membrane removal is time-consuming and labor-consuming, and large-scale batch removal is difficult; fourthly, safety risks exist, friction of the steel wire brush is ignited or heated in a mechanical removal mode, flammable and explosive propellants exist in residues, and certain potential safety hazards exist in manual operation. In recent years, high-pressure water jet cleaning technology (patent CN 107716388B) and plasma surface treatment technology (patent CN107808815A) have been developed to clean and treat the surface of solid rocket engines, so as to improve the efficiency and reduce the risk to some extent.
Laser is another important invention of human beings after nuclear energy, computers and semiconductors in 20 th century, and is called as 'fastest knife', 'best ruler', 'brightest light'. The laser cleaning is a new material surface cleaning treatment technology, and can replace the traditional mechanical film removal, acid cleaning, sand blasting and high-pressure water gun cleaning. The flexible transmission device has the advantages of flexible transmission, good controllability, wide applicable materials, high efficiency, good effect and the like, and has more and more extensive application in the fields of automobile molds, rail transit, petroleum and petrochemical industry, cultural relic cleaning and the like in recent years.
Since the combustion chamber of the solid rocket engine is a long cylindrical structure, the problem of how to introduce and focus laser on the inner wall and how to move light on the inner wall needs to be considered when the inner wall is treated. At present, the method and the technology are not reported.
Disclosure of Invention
In view of the above, the present invention provides a laser cleaning device and method for inner wall of solid rocket engine casing.
In order to achieve the purpose, the invention provides the following technical scheme:
a laser cleaning device for the inner wall of a solid rocket engine shell comprises a laser system (101), a focusable rotary laser cleaning head (102), an engine shell supporting and moving mechanism (103), an air suction system (104) and computer software (18);
the laser system (101) is arranged on the optical platform (1), a laser beam emitted by the ultrafast pulse laser (2) sequentially passes through the energy regulator (3), the electronic shutter (4) and the periscope (5) and then enters the laser cleaning head (102), and the laser beam on the whole transmission light path is covered by a laser transmission protective tube (6) and used for providing an energy source for laser cleaning of the inner wall of the shell;
the variable-focus rotary laser cleaning head (102) is characterized in that a focusing lens (8) is fixed on a one-dimensional electric moving platform (9) and is arranged in a telescopic rod (7) of the laser cleaning head, one end of the telescopic rod (7) of the laser cleaning head is connected with the front end of a hollow rotary motor (10), and a reflector (12), an observation window (11) and a laser emergent window (13) which are integrated together are connected with a rotating shaft of the hollow rotary motor (10) and used for zooming and rotationally scanning laser beams in a shell;
the motor shell supporting and moving mechanism (103) is used for grasping the solid rocket motor shell (14) by an electric hand grasping I (15) and an electric hand grasping II (16), fixing the solid rocket motor shell on an electric translation table (17) and supporting and moving the motor shell;
the air suction system (104) consists of a group of air suction ducts (19) and a dust filter (20), the air suction ducts (19) are symmetrically distributed around the focusing rotary laser cleaning head (102), one end of each air suction duct is connected with the dust filter (20), and the other end of each air suction duct extends into the solid rocket engine shell (14) and is used for cleaning dust generated in the laser cleaning process;
the computer software (18) comprises a process data system and a process control system, and the process data system is communicated with the process control system through a protocol; the process data system completes the execution of process parameters and the planning of a laser scanning task and outputs a process file; the process control system is used as data input, and the execution of the laser cleaning of the inner wall of the rocket engine shell is completed through the input and the analysis of the process file;
the laser beam is guided into the focusable rotary laser cleaning head (102) through the laser system (101), then the laser beam is focused by a focusing lens (8) in the focusable rotary laser cleaning head (102) and reflected by a reflector (12), a focusing light spot is projected onto the inner wall of a solid rocket engine shell (14), and a hollow rotary motor (10) in the focusable rotary laser cleaning head (102) drives the reflector (12) at the rear end to rotate together, so that the laser beam is rotationally scanned in the shell for 360 degrees; the laser cleaning of the inner wall of the shell is realized by regulating and controlling the supporting and moving mechanism (103) of the engine shell through computer software (18).
Optionally, the central lines of the focusing rotary laser cleaning head (102) and the telescopic rod (7) of the laser cleaning head coincide with the central axis of the solid rocket engine shell (14).
Optionally, the laser pulse width of the ultrafast pulse laser (2) is less than 10ps, the pulse repetition frequency range is 1KHz to 10MHz, the single pulse laser energy is greater than 1 μ J, and the laser wavelength range is 260nm to 1035 nm.
Optionally, the type of the energy regulator (3) comprises polarization type, absorption type and reflection type, and is used for regulating the laser energy;
the electronic shutter (4) is used for controlling and adjusting the laser pulse number and the laser irradiation time.
Optionally, the periscope (5) is composed of an upper and a lower 45-degree high-reflectivity reflectors and is used for drawing and steering the light beam.
Optionally, the focusing rotary laser cleaning head (102) performs dynamic focusing according to the inner diameter of the shell, the size of a light spot projected to the inner wall of the shell can be adjusted through programming, and the laser beam realizes 360-degree free rotary scanning according to the programming.
Optionally, the angle range of the reflector (12) is 15-45 degrees, and the angle range of the corresponding emergent laser beam is 90-150 degrees;
the shell (14) of the solid rocket engine realizes the shell movement precision of less than 0.1mm and the movement speed of 1 mm/s-100 mm/s.
Optionally, the computer software (18) regulates and controls parameters of the ultrafast pulse laser (2), starting and stopping of the electronic shutter (4), dynamic focusing of the focusing lens (8), rotation of the hollow rotating motor (10), movement of the solid rocket engine housing (14), linkage of the solid rocket engine housing (17), and programming of a laser scanning path during laser cleaning.
Optionally, the shell caliber of the solid rocket engine shell (14) is larger than 50 mm.
The laser cleaning method for the inner wall of the solid rocket engine shell based on the device comprises the following steps:
s1: fixing a solid rocket engine shell (14) on a slide rail of an electric translation table (17) by using an electric hand-grasping unit (15) and an electric hand-grasping unit (16);
s2: opening a switch of the dust filter (20);
s3: opening the guide light of the ultrafast pulse laser (2), leading the light to enter a focusable rotary laser cleaning head (102) through a laser system (101), after being focused by a focusing lens (8), penetrating through a reflector (12) entering the focusable rotary laser cleaning head from a hollow rotary motor (10), and emitting the reflected light from a laser emitting window (13) and focusing the light on the inner wall of a solid rocket engine;
s4: adjusting the hollow rotating motor (10) and the solid rocket motor casing (14) through computer software (18) to move the guided light to the initial position of the area to be treated;
s5: inputting laser parameters, the rotating speed of a hollow rotating motor (10) and the motion parameters of a solid rocket engine shell (14) on computer software (18), and setting a scanning path for laser cleaning; the laser parameters comprise power, frequency, pulse mode, irradiation time and pulse number;
s6: starting laser, and starting to execute laser cleaning scanning through computer software (18);
s7: after the laser scanning is finished, judging whether the effect of expected cleaning of the laser cleaning head is achieved;
s8: if not, circularly executing the flows from S5 to S7;
s9: if yes, the computer software (18) and the ultrafast pulse laser (2) are directly shut down.
The invention has the beneficial effects that: according to the safety particularity of the rocket engine, ultrafast pulse laser is selected as a cutter for removing residues on the inner wall of the shell of the solid rocket engine, the ultrafast pulse laser cleaning principle is that the ultrafast pulse laser with high repetition frequency and high peak power impacts the surface of an area to be cleaned, and the residues are burst and separated from the surface of a base material by shock waves.
It has the following advantages in the cleaning of the residue in rocket engines:
firstly, the safety is good, the ultrafast pulse laser has the characteristics of small pulse width (femtosecond/picosecond magnitude), high peak power and the like, so that the ultrafast pulse laser has the cold processing property, almost has no heat influence in the processing process, and is very suitable for cleaning in flammable and explosive environments;
secondly, the precision is high: micron-scale residue cleaning can be realized without damaging the substrate;
thirdly, the efficiency is high: the efficiency of laser cleaning is in direct proportion to the laser output power, the processing efficiency can be greatly improved by improving the laser power, and the laser cleaning can be processed in parallel, so that a large amount of labor and time cost is saved;
fourthly, green environmental protection: the ultrafast pulse laser surface treatment technology is non-contact, and no extra pollutant, noise and the like are generated in the laser treatment process.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a laser cleaning and laser device for the inner wall of a solid rocket engine case;
FIG. 2 is a laser cleaning and torrent flow diagram of the inner wall of the solid rocket engine case.
Reference numerals: 1 optical platform, 2 ultrafast pulse laser, 3 energy regulators, 4 electronic shutters, 5 periscopes, 6 laser transmission protective tubes, 7 laser cleaning head telescopic rods, 8 focusing lenses, 9 one-dimensional electric mobile stations, 10 hollow rotating motors, 11 observation windows, 12 reflectors, 13 laser emitting windows, 14 solid rocket engine shells, 15 electric hand grasping one, 16 electric hand grasping two, 17 electric translation stations, 18 computer software, 19 air suction guide pipes, 20 dust filters, 101 laser systems, 102 adjustable-focus rotating laser cleaning heads, 103 engine shell supporting and moving mechanisms, 104 air suction systems and 105 software control systems.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and embodiments may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the schematic diagram of the device for laser cleaning of the inner wall of the solid rocket engine shell is shown, and the device comprises a laser system 101, a focusable rotary laser cleaning head 102, an engine shell supporting and moving mechanism 103, an air suction system 104 and computer software 18.
The laser system 101 is installed on the optical platform 1, a laser beam emitted by the ultrafast pulse laser 2 sequentially passes through the energy regulator 3, the electronic shutter 4 and the periscope 5 and then enters the focusing rotary laser cleaning head 102, and the laser beam on the whole transmission light path is covered by the laser transmission protective tube 6 and used for providing an energy source for laser cleaning of the inner wall of the shell. The variable-focus rotary laser cleaning head 102 is characterized in that a focusing lens 8 is fixed on a one-dimensional electric moving platform 9 and is arranged in a telescopic rod 7 of the laser cleaning head, one end of the telescopic rod is connected with the front end of a hollow rotary motor 10, and a reflector 12, an observation window 11 and a laser emitting window 13 which are integrated together are connected with a rotating shaft of the hollow rotary motor 10 and used for zooming and rotary scanning of laser beams in a shell. The motor shell supporting and moving mechanism 103 is used for supporting and moving the solid rocket motor shell 14, which is grasped by the electric hand grips 15 and 16 and fixed on the electric translation stage 17. The air suction system 104 consists of an air suction duct 19 and a dust filter 20, wherein the air suction duct 19 is symmetrically distributed around the laser cleaning head, one end of the air suction duct is connected with the dust filter 20, and the other end of the air suction duct extends into the solid rocket engine shell 14 and is used for cleaning dust generated in the laser removal process. The computer software 18 cooperatively controls the laser parameters, the focal length, the motor rotation parameters and the shell motion parameters, and is used for regulating and controlling the parameters of the whole laser processing process and planning the scanning path. Finally, the laser cleaning of the inner wall of the shell is realized through the cooperative work of software and hardware.
Fig. 2 is a specific process of laser cleaning and laser excitation of the inner wall of the shell of the specific solid rocket engine:
s1: fixing a solid rocket engine shell 14 on a slide rail of an electric translation table 17 by using an electric hand-grasping unit 15 and an electric hand-grasping unit 16;
s2: opening a dust filter switch;
s3: the ultrafast pulse laser 2 is turned on to guide light, the guide light enters the focus-adjustable rotary laser cleaning head 102 through the optical system 101, is focused through the focusing lens 8, passes through the hollow rotary motor 10 to enter the reflecting mirror 12 in the laser cleaning head, and the reflected light is emitted from the laser emitting window 13 and focused on the inner wall of the solid rocket engine;
s4: the hollow rotating motor 10 and the solid rocket motor shell 14 are adjusted through software, and the guided light is moved to the initial position of the area to be processed;
s5: opening control software in the computer software 18, setting laser parameters (pulse width tau, power P, repetition frequency F, pulse mode, irradiation time t and the like) and motion parameters (rotating tangential speed V1, scanning line interval D, width W of a region to be cleaned and scanning times N), and setting a scanning path of laser cleaning;
s6: starting laser, and clicking software to start to execute laser cleaning scanning;
s7: after the laser scanning is finished, judging whether the effect of expected cleaning of the laser cleaning head is achieved;
s8: if not, circularly executing the flows from S5 to S7;
s9: if so, the computer software 18 and ultrafast pulsed laser 2 are shut down directly.
When the ultrafast pulse laser removes the lining layer of the small-caliber (diameter 68mm) shell, the thickness of the lining layer is only 0.2mm, and the ultrafast pulse laser can accurately remove the lining layer material without damaging the heat insulation layer material below the lining layer material.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a solid rocket engine casing inner wall laser belt cleaning device which characterized in that: the device comprises a laser system (101), a focusable rotary laser cleaning head (102), an engine shell supporting and moving mechanism (103), an air suction system (104) and computer software (18);
the laser system (101) is arranged on the optical platform (1), a laser beam emitted by the ultrafast pulse laser (2) sequentially passes through the energy regulator (3), the electronic shutter (4) and the periscope (5) and then enters the laser cleaning head (102), and the laser beam on the whole transmission light path is covered by a laser transmission protective tube (6) and used for providing an energy source for laser cleaning of the inner wall of the shell;
the variable-focus rotary laser cleaning head (102) is characterized in that a focusing lens (8) is fixed on a one-dimensional electric moving platform (9) and is arranged in a telescopic rod (7) of the laser cleaning head, one end of the telescopic rod (7) of the laser cleaning head is connected with the front end of a hollow rotary motor (10), and a reflector (12), an observation window (11) and a laser emergent window (13) which are integrated together are connected with a rotating shaft of the hollow rotary motor (10) and used for zooming and rotationally scanning laser beams in a shell;
the motor shell supporting and moving mechanism (103) is used for grasping the solid rocket motor shell (14) by an electric hand grasping I (15) and an electric hand grasping II (16), fixing the solid rocket motor shell on an electric translation table (17) and supporting and moving the motor shell;
the air suction system (104) consists of a group of air suction ducts (19) and a dust filter (20), the air suction ducts (19) are symmetrically distributed around the focusing rotary laser cleaning head (102), one end of each air suction duct is connected with the dust filter (20), and the other end of each air suction duct extends into the solid rocket engine shell (14) and is used for cleaning dust generated in the laser cleaning process;
the computer software (18) comprises a process data system and a process control system, and the process data system is communicated with the process control system through a protocol; the process data system completes the execution of process parameters and the planning of a laser scanning task and outputs a process file; the process control system is used as data input, and the execution of the laser cleaning of the inner wall of the rocket engine shell is completed through the input and the analysis of the process file;
the laser beam is guided into the focus-adjustable rotary laser cleaning head (102) through the laser system (101), then the laser beam is focused by a focusing lens (8) in the focus-adjustable rotary laser cleaning head (102) and reflected by a reflector (12), a focusing light spot is projected onto the inner wall of a solid rocket engine shell (14), a hollow rotary motor (10) in the focus-adjustable rotary laser cleaning head (102) drives the reflector (12) at the rear end to rotate together, and the laser beam is enabled to be scanned in the shell in a 360-degree rotating mode; the laser cleaning of the inner wall of the shell is realized by regulating and controlling the supporting and moving mechanism (103) of the engine shell through computer software (18).
2. The laser cleaning device for the inner wall of the solid rocket engine shell according to claim 1, wherein: the central lines of the focusing rotary laser cleaning head (102) and the telescopic rod (7) of the laser cleaning head are superposed with the central axis of the solid rocket engine shell (14).
3. The laser cleaning device for the inner wall of the solid rocket engine shell according to claim 1, wherein: the laser pulse width of the ultrafast pulse laser (2) is less than 10ps, the pulse repetition frequency range is 1 KHz-10 MHz, the single pulse laser energy is more than 1 muJ, and the laser wavelength range is 260 nm-1035 nm.
4. The laser cleaning device for the inner wall of the solid rocket engine shell according to claim 1, wherein: the types of the energy regulator (3) comprise a polarization type, an absorption type and a reflection type, and are used for regulating the laser energy;
the electronic shutter (4) is used for controlling and adjusting the laser pulse number and the laser irradiation time.
5. The laser cleaning device for the inner wall of the solid rocket engine shell according to claim 1, wherein: the periscope (5) is composed of an upper reflector and a lower reflector with high reflectivity of 45 degrees and is used for pulling up and steering light beams.
6. The laser cleaning device for the inner wall of the solid rocket engine shell according to claim 1, wherein: the focusing rotary laser cleaning head (102) performs dynamic focusing according to the inner diameter of the shell, the size of a light spot projected to the inner wall of the shell can be adjusted through programming, and laser beams realize 360-degree free rotary scanning according to the programming.
7. The laser cleaning device for the inner wall of the solid rocket engine shell according to claim 1, wherein: the angle range of the reflector (12) is 15-45 degrees, and the angle range of the corresponding emergent laser beam is 90-150 degrees;
the shell (14) of the solid rocket engine realizes the shell movement precision of less than 0.1mm and the movement speed of 1 mm/s-100 mm/s.
8. The laser cleaning device for the inner wall of the solid rocket engine shell according to claim 1, wherein: the computer software (18) regulates and controls parameters of the ultrafast pulse laser (2), starting and stopping of the electronic shutter (4), dynamic focusing of the focusing lens (8), rotation of the hollow rotating motor (10), movement of the solid rocket engine shell (14), linkage of the solid rocket engine shell (17), and programming of a laser scanning path during laser cleaning.
9. The laser cleaning device for the inner wall of the solid rocket engine shell according to claim 1, wherein: the shell caliber of the solid rocket engine shell (14) is larger than 50 mm.
10. The laser cleaning method for the inner wall of the shell of the solid rocket engine based on the device of any one of claims 1-9, is characterized in that: the method comprises the following steps:
s1: fixing a solid rocket engine shell (14) on a slide rail of an electric translation table (17) by using an electric hand-grasping unit (15) and an electric hand-grasping unit (16);
s2: opening a switch of the dust filter (20);
s3: opening the guide light of the ultrafast pulse laser (2), leading the light to enter a focusable rotary laser cleaning head (102) through a laser system (101), after being focused by a focusing lens (8), penetrating through a reflector (12) entering the focusable rotary laser cleaning head from a hollow rotary motor (10), and emitting the reflected light from a laser emitting window (13) and focusing the light on the inner wall of a solid rocket engine;
s4: adjusting the hollow rotating motor (10) and the solid rocket motor casing (14) through computer software (18) to move the guided light to the initial position of the area to be treated;
s5: inputting laser parameters, the rotating speed of a hollow rotating motor (10) and the motion parameters of a solid rocket engine shell (14) on computer software (18), and setting a scanning path for laser cleaning; the laser parameters comprise power, frequency, pulse mode, irradiation time and pulse number;
s6: starting laser, and starting to execute laser cleaning scanning through computer software (18);
s7: after the laser scanning is finished, judging whether the effect of expected cleaning of the laser cleaning head is achieved;
s8: if not, circularly executing the flows from S5 to S7;
s9: if yes, the computer software (18) and the ultrafast pulse laser (2) are directly shut down.
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| CN117733358A (en) * | 2024-01-04 | 2024-03-22 | 江苏富乐华半导体科技股份有限公司 | Reworking method for engraving two-dimensional codes on copper-clad plate |
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| CN113731955A (en) * | 2020-05-29 | 2021-12-03 | 宝山钢铁股份有限公司 | Device and method for online removal of oxide scales on inner wall of oil pipe |
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| BE1012686A3 (en) * | 1999-05-26 | 2001-02-06 | Wallonia Space Logistics En Ab | Wood stripping system and procedure |
| CN108453097A (en) * | 2018-03-13 | 2018-08-28 | 武汉翔明激光科技有限公司 | A kind of laser cleaning mechanism for inner wall of the pipe |
| CN109175711A (en) * | 2018-09-18 | 2019-01-11 | 江苏大学 | A kind of device of the small-bore inner tube of laser cleaning |
| CN110548730A (en) * | 2019-09-10 | 2019-12-10 | 武汉武钢华工激光大型装备有限公司 | Laser cleaning device and method for aluminum alloy anodic oxide film and surface paint film composite layer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117733358A (en) * | 2024-01-04 | 2024-03-22 | 江苏富乐华半导体科技股份有限公司 | Reworking method for engraving two-dimensional codes on copper-clad plate |
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