CN120206002A - A method and device for adjusting light intensity of welding beam and laser welding machine - Google Patents
A method and device for adjusting light intensity of welding beam and laser welding machine Download PDFInfo
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- CN120206002A CN120206002A CN202510640131.4A CN202510640131A CN120206002A CN 120206002 A CN120206002 A CN 120206002A CN 202510640131 A CN202510640131 A CN 202510640131A CN 120206002 A CN120206002 A CN 120206002A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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Abstract
The invention relates to the technical field of laser welding, in particular to a method and a device for adjusting the light intensity of a light beam for welding and a laser welding machine. The method comprises the steps of identifying a processing surface of a target product and a processing track of the target product, generating Gaussian beams for each processing track, preheating at the starting point of the processing track, determining a first area, monitoring the temperature of the first area, judging whether the temperature of the first area reaches a preset temperature, if so, switching the Gaussian beams into flat-top beams, moving the flat-top beams along the processing track, processing the target product, determining a second area and a third area before the flat-top beams move, updating the second area and the third area in real time when the flat-top beams move, and adjusting the light intensity of the flat-top beams on the target product according to the temperature change condition of the second area and the third area. The invention solves the problem that the laser welding machine can not self-regulate the light intensity of laser.
Description
Technical Field
The invention relates to the technical field of laser welding, in particular to a method and a device for adjusting the light intensity of a light beam for welding and a laser welding machine.
Background
A laser welder is an apparatus that performs welding using a laser beam of high energy density as a heat source. It melts the material and forms a weld by the interaction of the laser beam with the material.
At present, the light intensity of laser of a laser welding machine is generally determined by manually adjusting the light intensity of laser capable of melting a processing material, and then the processing material is melted by adopting a laser beam corresponding to the light intensity so as to finish welding work.
In this way, in the whole welding process, the light intensity of the laser is always fixed, a protective layer or an oxide film exists on the surface of a processed material, the surface and the inner melting temperature of the processed material are inconsistent, and in the working process, as the laser always acts on the surface of the processed material, the temperature of a region near the laser is firstly influenced by the laser to rise in advance, the temperature of a point on a laser movement track is inconsistent, if the laser with fixed light intensity is adopted, the processing trace is rough due to the inconsistent temperature, so that the welding work by adopting the laser with fixed light intensity is unreasonable, and the problem that a laser welding machine cannot self-regulate the light intensity of the laser exists.
Disclosure of Invention
In view of the above, it is necessary to provide a method and apparatus for adjusting the intensity of a beam for welding and a laser welder.
The embodiment of the invention is realized in such a way that the method for adjusting the light intensity of the light beam for welding comprises the following steps:
s101, identifying the machining surfaces of a target product and determining the machining track on each machining surface;
S102, for each section of processing track, generating Gaussian beams according to preset light intensity, and preheating the start points of the section of processing track by adopting the Gaussian beams;
S103, marking an irradiation area formed by a Gaussian beam on a target product as a first area, and monitoring the temperature of the first area;
s104, judging whether the temperature of the first area reaches a preset temperature, if so, switching the Gaussian beam into a flat-top beam, and adopting the flat-top beam to move along the section of processing track so as to process the target product;
S105, before the flat-top beam moves, marking an irradiation area formed by the flat-top beam on a target product as a second area, determining the next advancing area of the flat-top beam according to the second area and the section of processing track, and marking the next advancing area as a third area;
And S106, updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change conditions of the second area and the third area.
In one embodiment, the present invention provides a beam intensity adjustment device for welding, the beam intensity adjustment device for welding comprising:
the track determining module is used for identifying the processing surfaces of the target product and determining the processing track on each processing surface;
the first processing module is used for generating Gaussian beams according to preset light intensity for each section of processing track, and preheating the start points of the section of processing track by adopting the Gaussian beams;
The temperature detection module is used for marking an irradiation area formed by the Gaussian beam on the target product as a first area and monitoring the temperature of the first area;
the beam switching module is used for judging whether the temperature of the first area reaches a preset temperature, if so, switching the Gaussian beam into a flat-top beam, and adopting the flat-top beam to move along the section of processing track so as to process the target product;
The area identification module is used for marking an irradiation area formed by the flat-top beam on the target product as a second area before the flat-top beam moves, determining the next advancing area of the flat-top beam according to the second area and the section of processing track, and marking the next advancing area as a third area;
And the light intensity adjusting module is used for updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change conditions of the second area and the third area.
In one embodiment, the invention provides a laser welding machine, which comprises a laser emitting module, a temperature identification module, a beam shaping module and a control module;
The laser emission module is connected with the control module and is used for generating Gaussian beams;
the temperature identification module is connected with the control module and is used for identifying the temperature;
the beam shaping module is connected with the control module and is used for converting the Gaussian beam into a flat-top beam;
the control module is used for executing the steps of the light beam intensity adjusting method for welding.
The beam intensity adjusting method for welding comprises the steps of identifying a processing surface of a target product, determining a processing track on each processing surface, generating a Gaussian beam according to preset light intensity for each processing track, preheating the Gaussian beam at the starting point of the processing track, marking an irradiation area formed by the Gaussian beam on the target product as a first area, monitoring the temperature of the first area, judging whether the temperature of the first area reaches the preset temperature, switching the Gaussian beam into a flat-top beam, moving the flat-top beam along the processing track to process the target product, marking the irradiation area formed by the flat-top beam on the target product as a second area before the flat-top beam moves, determining the next advancing area of the flat-top beam according to the second area and the processing track, marking the next advancing area as a third area, updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change condition of the second area and the third area. In this way, for each section of processing track, gaussian beams with strong focusing capability and concentrated energy are firstly adopted for preheating, after the area acted by the Gaussian beams reaches the preset temperature, the Gaussian beams are switched into flat-top beams with sharp edges and uniform energy distribution, and in the moving process of the flat-top beams, the light intensity of the flat-top beams acting on a target product is regulated according to the temperature change condition so as to ensure consistent temperature, so that the processing track is smooth, and the problem that the laser welding machine cannot self-regulate the light intensity of laser is solved.
Drawings
FIG. 1 is a flow chart of a method of adjusting the intensity of a beam for welding in one embodiment;
FIG. 2 is a block diagram of a beam intensity adjustment device for welding according to one embodiment;
FIG. 3 is a block diagram of a laser welder in one embodiment;
FIG. 4 is a block diagram of the internal architecture of a control module in one embodiment.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms unless otherwise specified. These terms are only used to distinguish one element from another element. For example, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script, without departing from the scope of this disclosure.
As shown in fig. 1, in one embodiment, a method for adjusting light intensity of a welding beam is provided, which specifically includes the following steps:
s101, identifying the machining surfaces of a target product and determining the machining track on each machining surface;
S102, for each section of processing track, generating Gaussian beams according to preset light intensity, and preheating the start points of the section of processing track by adopting the Gaussian beams;
S103, marking an irradiation area formed by a Gaussian beam on a target product as a first area, and monitoring the temperature of the first area;
s104, judging whether the temperature of the first area reaches a preset temperature, if so, switching the Gaussian beam into a flat-top beam, and adopting the flat-top beam to move along the section of processing track so as to process the target product;
S105, before the flat-top beam moves, marking an irradiation area formed by the flat-top beam on a target product as a second area, determining the next advancing area of the flat-top beam according to the second area and the section of processing track, and marking the next advancing area as a third area;
And S106, updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change conditions of the second area and the third area.
In this embodiment, the processing of the target product is welding the target product.
In the embodiment, the processing surface of the target product is identified, the processing track on each processing surface can be obtained through image identification by the image acquisition module, and the processing track on the processing surface can be simulated on the control module according to the processing design file after the processing surface of the target product is identified by the image acquisition module. The tooling design file may be a stp, dxf, igs or the like format file.
In this embodiment, the starting point of the processing track may be identified by the image acquisition module, and the starting point of the processing track may be moved to the laser working point by the movement module.
In this embodiment, both the gaussian beam and the flat-top beam are lasers.
In this embodiment, the preset temperature may be set to the melting temperature of the material of the processing surface. If the temperature of the first region reaches the preset temperature, S104 is repeated until the temperature of the first region reaches the preset temperature.
In this embodiment, the flat-top beam is adopted to move along the processing track, so as to process the target product, which may be controlled by the mobile device to move according to the processing track.
The beam intensity adjusting method for welding comprises the steps of identifying a processing surface of a target product, determining a processing track on each processing surface, generating a Gaussian beam according to preset light intensity for each processing track, preheating the Gaussian beam at the starting point of the processing track, marking an irradiation area formed by the Gaussian beam on the target product as a first area, monitoring the temperature of the first area, judging whether the temperature of the first area reaches the preset temperature, switching the Gaussian beam into a flat-top beam, moving the flat-top beam along the processing track to process the target product, marking the irradiation area formed by the flat-top beam on the target product as a second area before the flat-top beam moves, determining the next advancing area of the flat-top beam according to the second area and the processing track, marking the next advancing area as a third area, updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change condition of the second area and the third area. In this way, for each section of processing track, gaussian beams with strong focusing capability and concentrated energy are firstly adopted for preheating, after the area acted by the Gaussian beams reaches the preset temperature, the Gaussian beams are switched into flat-top beams with sharp edges and uniform energy distribution, and in the moving process of the flat-top beams, the light intensity of the flat-top beams acting on a target product is regulated according to the temperature change condition so as to ensure consistent temperature, so that the processing track is smooth, and the problem that the laser welding machine cannot self-regulate the light intensity of laser is solved.
In one embodiment, the generating a gaussian beam according to the preset light intensity, and preheating the start point of the processing track by using the gaussian beam includes:
Acquiring light intensity I 1 corresponding to material melting of a processing surface;
Obtaining preset light intensity I 2 from 2*I 1;
From the following components Obtaining the total power of Gaussian beams;
Controlling a laser emission module to generate Gaussian beams according to the total power of the Gaussian beams;
Moving the Gaussian beam to the starting point of the section of processing track, and enabling the beam waist radius of the Gaussian beam to be equal to the radius of an irradiation area formed by the Gaussian beam on a target product so as to preheat the starting point of the section of processing track;
Where ω is the beam waist radius of the gaussian beam.
In this embodiment, the melting point of the material determines the minimum temperature required to be reached during the processing of the light beam, which is a certain requirement for the light intensity of the light beam, and if the light intensity of the light beam is too low, the minimum temperature during the processing of the light beam cannot be reached, and the material cannot be melted, so that the light intensity I 1 corresponding to the melting of the material on the processing surface is obtained, which is essentially the light intensity corresponding to the minimum temperature required to be reached during the processing of the light beam.
In the present embodiment, the light intensity I 1 and the preset light intensity I 2 refer to peak light intensities.
In this embodiment, the preset light intensity is set by 2*I 1, because the processing track has not been irradiated by the light beam, the temperature is low, and the temperature can be quickly raised by adopting the preset light intensity. The reason for setting the value of I 1 to 2 times is that when the beam waist radius of the Gaussian beam is equal to the radius of the area of the Gaussian beam acting on the target product, the energy acting on the processing surface is 86.5% of the total energy, so even though the total power of the Gaussian beam calculated by I 1 is 2 times, the energy acting on the processing surface is 86.5% of the total energy, 73% more energy than the light intensity corresponding to the lowest temperature is needed, and therefore, the material can not be quickly burned off due to the too high energy, and the material can be quickly heated.
In the present embodiment, in general, the transmission power of the laser emitting module (i.e., the total power of Gaussian beams) is set byThe peak light intensity of the laser (Gaussian beam) generated by the laser emitting module can be calculated, wherein the light intensity is the energy of the light passing through a unit area in unit time, and the higher the light intensity is, the higher the energy density of the laser is, and the stronger the effect on the material is. The material heats up and melts after absorbing energy, and the higher the energy, the faster the material heats up.
In this embodiment, the correspondence between the intensity of the Gaussian beam and the peak intensity isWhere I (d) denotes the light intensity at a distance d from the beam central axis, I 0 denotes the peak light intensity at the beam center (d=0), which is the maximum light intensity value of the beam, d denotes the distance of the radial coordinate to the beam central axis, ω is the beam waist radius of the gaussian beam, defined as the radius at which the light intensity decays to 1/e 2 (13.5%) of I 0. For a gaussian beam, the region with the highest intensity is the central region, and the intensity within the beam waist radius of the gaussian beam can be obtained by a correspondence. The intensity of light exceeding the beam waist radius is too small, so that the beam waist radius of the gaussian beam is controlled to be equal to the radius of the area of the gaussian beam acting on the target product, thereby preheating the start point of the processing track.
In this embodiment, the laser emitting module may directly generate the gaussian beam.
In one embodiment, the monitoring the temperature of the first region includes:
Carrying out temperature identification on the first area through a temperature identification module to obtain a temperature contour map of the first area;
determining the temperature of each contour region of the first region according to the temperature contour map of the first region;
The average value of the temperature of each of the contour regions of the first region is recorded as the temperature of the first region.
In this embodiment, the irradiation area formed by the gaussian beam on the target product has a shape resembling a circle, so the first area can be regarded as a circle. The temperature contour map of the first region is a number of concentric circles, since the intensity of the gaussian beam decays smoothly from the center outwards, so that different temperatures will be present in the first region. The temperature will radiate to the vicinity, i.e. the temperatures in the vicinity will interfere with each other due to the heat transfer effect of the material, so that the average value of the temperature in each of the contour regions of the first region is taken as the temperature of the first region.
In one embodiment, the switching the gaussian beam to a flat top beam includes:
Controlling the Gaussian beam to pass through a beam shaping module to generate a flat-top beam;
the n value of the beam shaping module is set so that the radius of an irradiation area formed by the flat-top beam on the target product is equal to the beam waist radius of the Gaussian beam.
In this embodiment, there are various beam shaping modules, such as a Diffractive Optical Element (DOE), a Spatial Light Modulator (SLM), a microlens array, a refractive beam shaper, and the like.
In this embodiment, the correspondence between the intensity of the flat-top beam and the peak intensity isWhere n is a number of Gao Sijie and when n is equal to 2, it is a gaussian beam. Unlike a gaussian beam, R is the radius of the uniform intensity region, which is related to n. R is ω only when n is equal to 2. For a flat-top beam, the greater n, the flatter the intensity in the center region and the steeper the edges. For example, when n is equal to 8, the intensity of the flat-top beam in R is close to the peak intensity, and the intensity of the light outside R is close to 0.
In this embodiment, the gaussian beam is controlled to generate a flat-top beam by the beam shaping module, and at this time, the emission power of the laser emission module is not changed, that is, the total power of the flat-top beam is equal to the total power of the gaussian beam. Since the emission power of the laser emission module is not changed, if the radius of an irradiation area formed by the flat-top beam on the target product is equal to the beam waist radius of the Gaussian beam, the peak light intensity of the flat-top beam is only half of the peak light intensity of the Gaussian beam. When the preset light intensity I 2 is set, the light intensity I 1 is multiplied by 2, so that the peak light intensity of the flat-top beam is exactly equal to the light intensity I 1. Of course, the radius of the irradiation area formed by the flat-top beam on the target product can be larger than the beam waist radius of the Gaussian beam, so that the peak light intensity of the flat-top beam is smaller than half of the peak light intensity of the Gaussian beam, namely lower than the light intensity I 1. The light intensity can be adjusted in the process of moving the flat-top beam, so that the processing mode is also feasible, and only the scheme that the radius of an irradiation area formed by the flat-top beam on a target product is equal to the beam waist radius of the Gaussian beam is preferably selected.
In this embodiment, according to the corresponding relation between the light intensity of each flat-top beam and the peak light intensity, when n is equal to 8, the light intensity is reduced to 13.5% of the total power at the radius of the irradiation area formed by the flat-top beam on the target product, which is close to the flat-top beam characteristic. Therefore, the value of n of the beam shaping module is set, and n is only required to be 8 or more.
In one embodiment, the determining the next traveling area of the flat-top beam according to the second area and the processing track, which is marked as a third area, includes:
The second area is regulated into a circle, and the circle is marked as an initial circle;
Determining the radius of an initial circle;
Determining a concentric circle by taking 3r as a radius and the center of an initial circle as a center;
Determining a ring which is not overlapped with the initial circle and the concentric circle according to the initial circle and the concentric circle, and marking the ring as a region to be determined;
And determining an area with consistent initial circular shape in the area to be determined and the area where the processing track of the section is overlapped, determining the area as the next advancing area of the flat-top beam, and marking the area as a third area.
In this embodiment, the irradiation area of the flat-top beam formed on the target product is a shape resembling a circle, i.e., the second area is a shape resembling a circle. The second area is regulated into a circle, and the second area can be realized by adopting algorithms such as a least square method, hough transformation and the like.
In this embodiment, essentially the third region is the next second region.
In one embodiment, the updating the second area and the third area in real time includes:
Judging whether an irradiation area formed by the flat-top beam on the target product overlaps with a third area, if so, determining the third area as a new second area, and deleting the old second area to keep only one second area in the process of moving the flat-top beam;
Determining the next advancing area of the flat-top beam according to the second area and the section of processing track, and marking the next advancing area as a new third area;
The old third area is deleted to keep only one third area in the process of moving the flat top beam.
In this embodiment, when the flat-top beam is moved, there are various working modes of the flat-top beam, for example, moving a fixed distance to retransmit the flat-top beam to act on the processing surface, and stopping for a certain time each time to make the flat-top beam complete the welding work at the position, where the moving fixed distance may be the diameter of the irradiation area formed by the flat-top beam on the target product, and this mode may reduce the energy consumption while ensuring that the processing track is processed as much as possible, and also still keeping the flat-top beam to be transmitted all the time during the moving, this mode also needs to stopping for a certain time every moving a fixed distance to make the flat-top beam complete the welding work at the position, and the moving fixed distance may be the diameter of the irradiation area formed by the flat-top beam on the target product, and the process is the same as the former, but only has a part of energy consumption during the moving. Based on these two modes of operation, a fixed distance is essentially the distance from the center point of the second region to the center point of the third region, so the third region is the new second region. The second area is an irradiation area formed by the flat-top beam on the target product, is a real-time irradiation area, only one second area can exist at the same time, and the third area is calculated according to the second area, and changes every time the second area changes, the third area also changes.
In one embodiment, the adjusting the light intensity of the flat-top beam on the target product according to the temperature change conditions of the second area and the third area includes:
Carrying out temperature identification on the second area through a temperature identification module to obtain a temperature contour map of the second area;
monitoring the temperatures of the second region and the third region respectively;
obtaining a temperature change rate k of the second region from (T 2-T1)/T;
Determining the light intensity I 3 of the flat-top beam by P/A;
Establishing a corresponding relation between the light intensity I 3 and the temperature change rate k;
Obtaining the rate K to be changed of the third area from (T 2-T3)/T;
Substituting the to-be-changed rate K into a corresponding coordinate system of the light intensity I 3 and the temperature change rate K to obtain to-be-changed light intensity I 4;
Obtaining power to be adjusted from (I 4-I3) A;
The real-time total power of the generated flat-top beam is adjusted according to the power to be adjusted, so that the light intensity of the flat-top beam acting on a target product is adjusted;
Wherein T is the residence time of the flat-top beam in the second area, T 2 is the cutoff temperature of the second area at the cutoff time of the residence time, T 1 is the starting temperature of the second area at the starting time of the residence time, P is the real-time total power of the generated flat-top beam, A is the irradiation area formed by the flat-top beam on the target product, and T 3 is the cutoff temperature of the third area at the cutoff time of the residence time.
In the present embodiment, the step of monitoring the temperatures of the second region and the third region, respectively, is the same as the step of monitoring the temperature of the first region.
In this embodiment, the correspondence between the intensity of the flat-top beam and the peak intensity isCan be obtained by integrating the light intensityIdeally, p=pi R 2I0 can be obtained, and the radius of the irradiation area formed by the flat-top beam on the target product is equal to the beam waist radius of the gaussian beam, so that a=pi R 2＝πω2, and ideally, the light intensity in R of the flat-top beam can be regarded as peak light intensity, so that the light intensity I 3 of the flat-top beam is determined by P/a.
In this embodiment, the real-time total power of the flat-top beam is adjusted according to the power to be adjusted, that is, the power to be adjusted is added or subtracted from the original total power of the flat-top beam to obtain a new total power.
In this embodiment, I 4-I3 may be positive or negative, so that the power to be adjusted may be positive or negative, and if positive, the power to be adjusted is added to the original total power of the flat-top beam, and if negative, the power to be adjusted is subtracted from the original total power of the flat-top beam.
In this embodiment, since p=pi R 2I0, the essence of adjusting the light intensity is to adjust the emission power of the laser emission module, while the flat-top beam is converted from the gaussian beam and the laser emission module emits the gaussian beam, so that the total power of the gaussian beam is essentially adjusted.
In this embodiment, the residence time of the flat-top beam in the second area may be obtained according to the residence time of the flat-top beam in the first and second areas, for example, the image recognition module is used to recognize the processing trace of the welding operation performed on the first and second areas by using the flat-top beam, for example, recognize the depth of the processing trace in the melting process, and when the depth of the processing trace reaches the depth required for processing, the flat-top beam is moved and the processing time of the flat-top beam on the first and second areas is calculated, where this time is the residence time of the flat-top beam in the second area. In addition to the image recognition module, the pressure and flow of the assist gas may also be monitored by the gas monitoring module to calculate the residence time.
In this embodiment, since the third region is not a direct irradiation region of the flat-top beam, the temperature of the third region is smaller than that of the second region, so that the third region needs to be warmed up, but the magnitude of the warming up is changed.
In this embodiment, T 3 is not necessarily equal to T 1 because the flat-top beam is moved onto the third area, and during the movement, T 3 may be greater than T 1 but less than T 2 if the flat-top beam is always emitted, and T 3 may be less than T 1 due to heat dissipation and thermal effects if the flat-top beam is emitted only in the second area.
In one embodiment, the establishing the correspondence between the light intensity I 3 and the temperature change rate k includes:
Establishing a coordinate system by taking light intensity as a horizontal axis and the change rate as a vertical axis;
The light intensity I 3 and the temperature change rate k are in one-to-one correspondence to form a plurality of data sets;
Marking all the data sets on a coordinate system one by one;
And judging whether the number of the data sets is 1, if so, calculating to obtain the corresponding relation between the light intensity I 3 and the temperature change rate k according to the origin of the coordinate system and the data sets by adopting a linear regression equation mode, and if not, calculating to obtain the corresponding relation between the light intensity I 3 and the temperature change rate k according to all the data sets by adopting a linear regression equation mode.
In the present embodiment, when the number of data sets is 1, only the origin of the coordinate system can be used as the data set. As the number of data sets increases, the correspondence between the intensity I 3 and the temperature change rate k will be more accurate.
In this embodiment, the correspondence between the light intensity I 3 and the temperature change rate k is updated every time a data set is generated.
As shown in fig. 2, in one embodiment, a beam intensity adjusting device for welding is provided, which may specifically include:
the track determining module is used for identifying the processing surfaces of the target product and determining the processing track on each processing surface;
the first processing module is used for generating Gaussian beams according to preset light intensity for each section of processing track, and preheating the start points of the section of processing track by adopting the Gaussian beams;
The temperature detection module is used for marking an irradiation area formed by the Gaussian beam on the target product as a first area and monitoring the temperature of the first area;
the beam switching module is used for judging whether the temperature of the first area reaches a preset temperature, if so, switching the Gaussian beam into a flat-top beam, and adopting the flat-top beam to move along the section of processing track so as to process the target product;
The area identification module is used for marking an irradiation area formed by the flat-top beam on the target product as a second area before the flat-top beam moves, determining the next advancing area of the flat-top beam according to the second area and the section of processing track, and marking the next advancing area as a third area;
And the light intensity adjusting module is used for updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change conditions of the second area and the third area.
In this embodiment, each module of the beam intensity adjusting device for welding is modularized in the method of the present invention, and for specific explanation of each module, please refer to the corresponding content of the method of the present invention, the embodiments of the present invention are not described herein again.
As shown in fig. 3, in one embodiment, a laser welding machine is provided, which may include a laser emitting module, a temperature identifying module, a beam shaping module, and a control module;
The laser emission module is connected with the control module and is used for generating Gaussian beams;
the temperature identification module is connected with the control module and is used for identifying the temperature;
the beam shaping module is connected with the control module and is used for converting the Gaussian beam into a flat-top beam;
the control module is used for executing the steps of the light beam intensity adjusting method for welding.
In this embodiment, the system further includes a conventional module such as a mobile module, an image recognition module, and a gas monitoring module. The moving module can be used for moving a target product, and can also be used for moving a Gaussian beam or a flat-top beam. The temperature identification module may be an image identification module with temperature detection so that the image identification module may be integrated with the temperature identification module. The gas monitoring module is used for monitoring the pressure and flow of auxiliary gas, the auxiliary gas can effectively isolate air and prevent metal oxidation of a welding area, and therefore welding quality is guaranteed. The auxiliary gas may be nitrogen, argon, or the like.
The laser welding machine provided by the embodiment of the invention is used for identifying the processing surface of a target product and determining the processing track on each processing surface, generating a Gaussian beam according to preset light intensity for each processing track, preheating the Gaussian beam at the starting point of the processing track, marking an irradiation area formed by the Gaussian beam on the target product as a first area, monitoring the temperature of the first area, judging whether the temperature of the first area reaches the preset temperature, switching the Gaussian beam into a flat-top beam, moving the flat-top beam along the processing track by adopting the flat-top beam so as to process the target product, marking the irradiation area formed by the flat-top beam on the target product as a second area before the flat-top beam moves, determining the next traveling area of the flat-top beam according to the second area and the processing track, marking the next traveling area as a third area, updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change condition of the second area and the third area. In this way, for each section of processing track, gaussian beams with strong focusing capability and concentrated energy are firstly adopted for preheating, after the area acted by the Gaussian beams reaches the preset temperature, the Gaussian beams are switched into flat-top beams with sharp edges and uniform energy distribution, and in the moving process of the flat-top beams, the light intensity of the flat-top beams acting on a target product is regulated according to the temperature change condition so as to ensure consistent temperature, so that the processing track is smooth, and the problem that the laser welding machine cannot self-regulate the light intensity of laser is solved.
FIG. 4 illustrates an internal block diagram of a control module in one embodiment. As shown in fig. 4, the control module includes a processor, a memory, a network interface, an input device, and a display screen connected by a system bus. The memory includes a nonvolatile storage medium and an internal memory. The nonvolatile storage medium of the control module stores an operating system and also stores a computer program, and when the computer program is executed by the processor, the processor can be enabled to realize the beam intensity adjusting method for welding provided by the embodiment of the invention. The internal memory may also store a computer program, which when executed by the processor, causes the processor to execute a method for adjusting the light intensity of a welding beam according to an embodiment of the present invention. The display screen of the control module can be a liquid crystal display screen or an electronic ink display screen, the input device of the control module can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the control module, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 4 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the control module to which the present inventive arrangements are applied, and that a particular control module may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the light beam intensity adjusting device for welding provided by the embodiment of the invention can be implemented in the form of a computer program, and the computer program can be run on a control module as shown in fig. 4. The memory of the control module may store various program modules constituting a beam intensity adjusting device for welding, such as a determination track module, a first processing module, a temperature detection module, a beam switching module, a region identification module, and a light intensity adjusting module shown in fig. 2. The computer program of each program module causes a processor to execute the steps of a method for adjusting the intensity of a beam for welding according to each embodiment of the present invention described in the present specification.
For example, the control module shown in fig. 4 may perform step S101 through the determination track module in the beam intensity adjusting device for welding as shown in fig. 2, the control module may perform step S102 through the first processing module, the control module may perform step S103 through the temperature detecting module, the control module may perform step S104 through the beam switching module, the control module may perform step S105 through the area identifying module, and the control module may perform step S106 through the intensity adjusting module.
In one embodiment, a control module is provided, the control module including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
s101, identifying the machining surfaces of a target product and determining the machining track on each machining surface;
S102, for each section of processing track, generating Gaussian beams according to preset light intensity, and preheating the start points of the section of processing track by adopting the Gaussian beams;
S103, marking an irradiation area formed by a Gaussian beam on a target product as a first area, and monitoring the temperature of the first area;
s104, judging whether the temperature of the first area reaches a preset temperature, if so, switching the Gaussian beam into a flat-top beam, and adopting the flat-top beam to move along the section of processing track so as to process the target product;
S105, before the flat-top beam moves, marking an irradiation area formed by the flat-top beam on a target product as a second area, determining the next advancing area of the flat-top beam according to the second area and the section of processing track, and marking the next advancing area as a third area;
And S106, updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change conditions of the second area and the third area.
In one embodiment, a computer readable storage medium is provided, having a computer program stored thereon, which when executed by a processor causes the processor to perform the steps of:
s101, identifying the machining surfaces of a target product and determining the machining track on each machining surface;
S102, for each section of processing track, generating Gaussian beams according to preset light intensity, and preheating the start points of the section of processing track by adopting the Gaussian beams;
S103, marking an irradiation area formed by a Gaussian beam on a target product as a first area, and monitoring the temperature of the first area;
s104, judging whether the temperature of the first area reaches a preset temperature, if so, switching the Gaussian beam into a flat-top beam, and adopting the flat-top beam to move along the section of processing track so as to process the target product;
S105, before the flat-top beam moves, marking an irradiation area formed by the flat-top beam on a target product as a second area, determining the next advancing area of the flat-top beam according to the second area and the section of processing track, and marking the next advancing area as a third area;
And S106, updating the second area and the third area in real time when the flat-top beam moves, and adjusting the light intensity of the flat-top beam on the target product according to the temperature change conditions of the second area and the third area.
It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in various embodiments may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SYNCHLINK) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (10)
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140290847A1 (en) * | 2013-03-29 | 2014-10-02 | Lts Co., Ltd. | Optical system and substrate sealing method |
| US20190389002A1 (en) * | 2018-03-27 | 2019-12-26 | Xiao-Dong Xiang | Micro-zone laser heating apparatus and method |
| CN115255612A (en) * | 2022-09-19 | 2022-11-01 | 桂林电子科技大学 | Laser welding-based beam shaping method, system and application device |
| CN115826254A (en) * | 2023-02-14 | 2023-03-21 | 清华大学 | A flat-hat beam modulation method, system and storage medium |
| WO2024131883A1 (en) * | 2022-12-23 | 2024-06-27 | 华为技术有限公司 | Light beam shaping system, light beam modulation method, and related apparatus |
| KR102711488B1 (en) * | 2023-10-05 | 2024-09-26 | 지이티에스 주식회사 | Frit sealing system using laser with lighting for guide |
-
2025
- 2025-05-19 CN CN202510640131.4A patent/CN120206002B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140290847A1 (en) * | 2013-03-29 | 2014-10-02 | Lts Co., Ltd. | Optical system and substrate sealing method |
| US20190389002A1 (en) * | 2018-03-27 | 2019-12-26 | Xiao-Dong Xiang | Micro-zone laser heating apparatus and method |
| CN115255612A (en) * | 2022-09-19 | 2022-11-01 | 桂林电子科技大学 | Laser welding-based beam shaping method, system and application device |
| WO2024131883A1 (en) * | 2022-12-23 | 2024-06-27 | 华为技术有限公司 | Light beam shaping system, light beam modulation method, and related apparatus |
| CN115826254A (en) * | 2023-02-14 | 2023-03-21 | 清华大学 | A flat-hat beam modulation method, system and storage medium |
| KR102711488B1 (en) * | 2023-10-05 | 2024-09-26 | 지이티에스 주식회사 | Frit sealing system using laser with lighting for guide |
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