Device and method for removing attachments on surface of welded steel plate through laser

Abstract

The invention discloses a device for removing attachments on the surface of a welded steel plate through laser. The device comprises a conveying assembly and a laser dust removal assembly. The conveying assembly is used for conveying a steel plate to be treated and comprises a driving motor, an output shaft of the driving motor is connected with rollers through transmission parts, magnets are arranged in the rollers, the multiple rollers form a conveying assembly line, and the steel plate is placed on the conveying assembly line and fixed through attraction of the magnets. The laser dust removal assembly is used for surface attachments of a steel plate and comprises a mounting table, a dust removal laser head module, a conduction optical fiber and a laser source. The installation tables are arranged on the upper side and the lower side of the conveying assembly line, the dust removal laser head modules are fixedly installed on the installation tables respectively, the dust removal laser head modules right face dust removal stations on the conveying assembly line, and the laser sources are connected with the dust removal laser head modules through conduction optical fibers.

Description

Technical Field

[0001] The present invention relates to the field of laser dust removal, and in particular to a device and method for removing surface attachments of steel plates after welding using laser. Background Art

[0002] At present, after laser wire welding, automobile sheet metal is prone to adhesion of yellow smoke and other fine nano-level particles on the upper and lower surfaces due to slight oil stains on the sheet metal surface, as well as welding dust collection space and efficiency issues. This affects subsequent production processes and requires smoke removal.

[0003] At present, there are two ways to remove smoke and dust from the front and back surfaces of steel plates:

[0004] 1) Manual wiping with non-woven cotton cloth has high material cost, high labor input, high labor cost, slow efficiency, and poor wiping effect, which can only wipe away 50%-80% of the smoke and dust.

[0005] 2) The automated method uses a felt wheel to rub in a spiral motion, which requires the addition of a corresponding 3- to 4-axis linkage mechanism. This has high investment costs and requires frequent replacement of consumables. For different welding lengths and product thicknesses, manual reprogramming and re-inspection of points are required, resulting in high labor costs. Furthermore, the wiping effect is poor, and only 40%-70% of the smoke can be wiped off.

[0006] In order to solve the above problems, the patent application document with application number 202310947241.6 discloses a laser cutting non-contact surface dust removal device, including a dust removal system on the pole piece, a dust removal support system under the pole piece and a guide roller, and the guide roller is located between the dust removal system on the pole piece and the dust removal support system under the pole piece; a porous air suspension plate and a blowing joint are arranged in the dust removal support system under the pole piece, wherein the blowing joint compresses the air through the porous air suspension plate to form air damping; the dust removal system on the pole piece includes a blowing component and a dust removal cavity component.

[0007] The above technical solution is to set up a porous air suspension plate and a blowing joint. The blowing joint compresses air to form air damping through the porous air suspension plate to form a supporting and buffering effect on the electrode piece, thereby achieving the purpose of dust removal.

[0008] However, since the types of surface attachments after steel plate welding include metals, organic matter, nanoparticles, etc., the above technical solutions cannot be adjusted specifically and the cleaning effect is limited.

[0009] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Summary of the Invention

[0010] The object of the present invention is to provide a device and method for removing surface attachments after steel plate welding by laser to solve the problems existing in the prior art.

[0011] The above technical object of the present invention is achieved by the following technical solutions:

[0012] A device for removing surface attachments after steel plate welding by laser includes a conveying component and a laser dust removal component;

[0013] The conveying component is used to convey the steel plate to be processed, which includes a driving motor. The output shaft of the driving motor is connected to a roller through a transmission member. A magnet is provided inside the roller. A plurality of the rollers form a conveying pipeline. The steel plate is placed on the conveying pipeline and fixed by the adsorption of the magnet;

[0014] The laser dust removal component is used for the surface attachments of the steel plate, which includes a mounting table, a dust removal laser head module, a conducting optical fiber and a laser source; the mounting table is arranged on the upper and lower sides of the conveying pipeline. A dust removal laser head module is respectively fixedly installed on the mounting table. The dust removal laser head module is directly opposite to the dust removal station on the conveying pipeline. The laser source is connected to the dust removal laser head module through the conducting optical fiber.

[0015] Further, the dust removal station is located at the middle position of the conveying pipeline. A group of mounting positions are provided on the conveying pipeline at the dust removal station. The dust removal laser head modules of the laser dust removal component are respectively arranged in the mounting positions.

[0016] Further, the laser source can adjust the laser parameters according to the type of surface attachments. The laser types of the laser source include fiber laser, ultraviolet laser and femtosecond laser;

[0017] The surface attachments include dust, oxides and nanoparticles; the laser parameters include wavelength, power and pulse width.

[0018] Further, the dust removal laser head module includes an optical system and a sensing and control system;

[0019] The optical system includes a scanning galvanometer for controlling the laser path and a focusing lens for adjusting the laser energy density;

[0020] The sensing and control system has a spectrometer and a control system. The spectrometer is used to detect the surface cleanliness and feedback to adjust the laser parameters; the control system integrates a PLC or AI algorithm for dynamic dust removal.

[0021] Further, it also includes a dust collection device for collecting decomposition products.

[0022] A method for removing surface attachments after steel plate welding by laser includes the following steps:

[0023] S1. Start the drive motor, place the steel plate to be processed on the conveyor line, and the steel plate to be processed moves along the conveyor line under the drive of the rollers;

[0024] S2. When the steel plate to be processed reaches the dust removal station of the conveyor line, the laser source generates a laser beam and transmits it to the dust removal laser head module through the conduction optical fiber;

[0025] S3. A linear light source is generated inside the dust removal laser head module and irradiates the surface of the steel plate to be processed respectively. The surface attachments of the steel plate are vaporized into smoke and dust, which are collected by the dust collection device.

[0026] In summary, the present invention has the following beneficial effects:

[0027] The equipment module is specially developed for removing pollutants such as residual dust, oxides, and nanoparticles in laser tailor-welded blanks for automobiles. It has strong adaptability and can be used for various shaped tailor-welded blanks.

[0028] Combined with automatic feeding, it can operate simultaneously without a sequential action order, saving time.

[0029] Using nanosecond lasers, both heads simultaneously remove post-weld smoke and dust, etc. It has high efficiency, no consumables, and saves labor and material costs;

[0030] The laser treatment combined with the module dust removal mechanism is more efficient and environmentally friendly. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the device for removing surface attachments described in the present invention.

[0032] Figure 2 is a schematic diagram of the conveying component described in the present invention.

[0033] Figure 3 is a schematic diagram of the laser dust removal component described in the present invention. Detailed Embodiments

[0034] In order to make the technical means, creative features, achieved purposes, and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0035] As Figure 1 and Figure 3 shown, a device for removing surface attachments after steel plate welding proposed by the present invention includes a conveying component 1 and a laser dust removal component 2;

[0036] The conveying component 1 is used to convey the steel plate 3 to be processed. It includes a driving motor 11, the output shaft of the driving motor 11 is connected to a roller 13 through a transmission member 12, a magnet 14 is arranged inside the roller 13, and several of the rollers 13 form a conveying line. The steel plate 3 is placed on the conveying line and fixed by the adsorption of the magnet 14;

[0037] The laser dust removal component 2 is used for the surface attachments of the steel plate 3. It includes a mounting table 21, a dust removal laser head module 22, a conduction optical fiber 23, and a laser source 24; the mounting table 21 is arranged on the upper and lower sides of the conveying line, and a dust removal laser head module 22 is respectively and fixedly installed on the mounting table 21. The dust removal laser head module 22 is directly opposite to the dust removal station 15 on the conveying line, and the laser source 24 is connected to the dust removal laser head module through the conduction optical fiber 23.

[0038] The dust removal station 15 is located at the middle position of the conveying line. A set of mounting positions 16 are arranged on the conveying line at the dust removal station 15, and the dust removal laser head modules 22 of the laser dust removal component 2 are respectively arranged in the mounting positions 16.

[0039] The laser source 24 can adjust the laser parameters according to the type of surface attachments. The laser types of the laser source 24 include fiber laser, ultraviolet laser, and femtosecond laser;

[0040] The surface attachments include dust, oxides, and nanoparticles; the laser parameters include wavelength, power, and pulse width.

[0041] The dust removal laser head module 22 includes an optical system and a sensing and control system;

[0042] The optical system includes a scanning galvanometer for controlling the laser path and a focusing lens for adjusting the laser energy density;

[0043] The sensing and control system has a spectrometer and a control system. The spectrometer is used to detect the surface cleanliness and feedback to adjust the laser parameters; the control system integrates a PLC or AI algorithm for dynamic dust removal.

[0044] It also includes a dust collection device for collecting decomposition products.

[0045] A method for removing surface attachments on a steel plate after welding by laser includes the following steps:

[0046] S1. Start the driving motor 11, place the steel plate 3 to be processed on the conveying line, and the steel plate 3 to be processed moves along the conveying line under the driving action of the roller 13;

[0047] S2. When the steel plate 3 to be processed reaches the dust removal station 15 of the conveying line, the laser source 24 generates a laser beam and transmits it to the dust removal laser head module 22 through the conduction optical fiber 23;

[0048] In S3, a linear light source is generated inside the dust removal laser head module 22 and irradiates the surface of the steel plate 3 to be processed respectively. The surface attachments of the steel plate 3 are vaporized into soot and collected by the dust collection device.

[0049] The working principle of the present invention is as follows:

[0050] According to the types of surface attachments (such as metals, organic substances, nanoparticles, etc.), the laser parameters (wavelength, power, pulse width) are adjusted. The dust particles are instantaneously heated by high-energy laser pulses, causing them to expand, fragment or vaporize. Lasers with specific wavelengths (such as ultraviolet lasers) directly break the chemical bonds of the dust and decompose it into harmless gases (such as CO2, H2O); ultrashort pulse lasers generate plasma shock waves to strip the particles attached to the surface; the decomposed / stripped dust is collected through a negative pressure suction or gas purge system to avoid secondary pollution, thereby non-contact cleaning the soot attached to the upper and lower surfaces of the steel plate after welding.

[0051] In this article, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the sake of clear expression of the technical solution and convenient description, so it cannot be understood as a limitation to the present invention.

[0052] In this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for removing surface attachments after steel plate welding by using laser, characterized in that, The included conveying component (1) and laser dust removal component (2); The conveying component (1) is used to convey the steel plate (3) to be processed. It includes a driving motor (11). The output shaft of the driving motor (11) is connected to a roller (13) through a transmission member (12). A magnet (14) is provided inside the roller (13). A number of the rollers (13) form a conveying pipeline. The steel plate (3) is placed on the conveying pipeline and is fixed by the adsorption of the magnet (14); The laser dust removal component (2) is used for the surface attachments of the steel plate (3). It includes a mounting table (21), a dust removal laser head module (22), a conducting optical fiber (23) and a laser source (24); The mounting table (21) is arranged on the upper and lower sides of the conveying pipeline. A dust removal laser head module (22) is fixedly installed on the mounting table (21) respectively. The dust removal laser head module (22) is directly opposite to the dust removal station (15) on the conveying pipeline. The laser source (24) is connected to the dust removal laser head module through the conducting optical fiber (23).

2. The device for removing surface attachments after steel plate welding using a laser according to claim 1, characterized in that, The dust removal station (15) is located at the middle position of the conveying pipeline. A set of mounting positions (16) are provided on the conveying pipeline at the dust removal station (15). The dust removal laser head modules (22) of the laser dust removal component (2) are respectively arranged in the mounting positions (16).

3. The device for removing surface attachments after steel plate welding by using laser according to claim 1, characterized in that, The laser source (24) can adjust the laser parameters according to the type of surface attachments. The laser types of the laser source (24) include fiber laser, ultraviolet laser and femtosecond laser; The surface attachments include dust, oxides and nanoparticles; The laser parameters include wavelength, power and pulse width.

4. The device for removing surface attachments after steel plate welding using a laser according to claim 1, characterized in that, The dust removal laser head module (22) includes an optical system and a sensing and control system; The optical system includes a scanning galvanometer for controlling the laser path and a focusing lens for adjusting the laser energy density; The sensing and control system has a spectrometer and a control system. The spectrometer is used to detect the surface cleanliness and feedback to adjust the laser parameters; The control system integrates a PLC or AI algorithm for dynamic dust removal.

5. The device for removing surface attachments after steel plate welding using a laser according to claim 1, characterized in that, It also includes a dust collection device for collecting decomposition products.

6. A method for removing surface attachments after steel plate welding using a laser, characterized in that, It includes the following steps: S1. Start the driving motor (11), place the steel plate (3) to be processed on the conveying pipeline. The steel plate (3) to be processed moves along the conveying pipeline under the driving action of the roller (13); S2. When the steel plate (3) to be processed reaches the dust removal station (15) of the conveying pipeline, the laser source (24) generates a laser beam and transmits it to the dust removal laser head module (22) through the conducting optical fiber (23); S3. A linear light source is generated inside the dust removal laser head module (22) and irradiates the surface of the steel plate (3) to be processed respectively. The surface attachments of the steel plate (3) are vaporized into soot and collected by the dust collection device.

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