51results about How to "Improve the utilization rate of laser energy" patented technology

The invention belongs to the field of laser processing, discloses an edge deletion method for thin-film solar cells, and concretely relates to a method for carrying out edge deletion on thin-film solar cells by using ultra-short pulse laser. The method disclosed by the invention is importantly characterized in that high-peak-power ultra-short pulse laser with an extremely high transparent conductive film absorption rate is introduced into an application of carrying out edge deletion on thin-film solar cells. Compared with laser power used by edge deletion implemented by using infrared nanosecond laser, the method can complete high-efficiency and high-quality laser edge deletion by using smaller average laser power; and glass is not easy to be damaged, the compatibility with different kinds of transparent conductive films is extremely strong, and the application cost is reduced.

The invention provides two methods and equipment for laser punching of cigarette tipping paper. One is a rotary multi-prism punching method and equipment; and the other one is a vibrating mirror punching method and equipment. The methods and the equipment can utilize optical equipment to focus laser output by a laser; and punch pores (15) which are distributed in a single-row or multi-row curve or repeated pattern on the surface of continuously-moving tipping paper (9), such as pores (15) distributed in triangular, jagged, rhombic, trapezoidal, sine or cosine arrangement. The methods can carry out high-speed curve punching on the tipping paper, has the punching speed which is the same as linear punching speed and has good machining efficiency and good product quality; and the equipment has a simple structure, long service life, stable operation and high utilization efficiency of laser energy.

The invention relates to a laser TIG arc coaxial hybrid welding method with an additional high frequency magnetic field and a device. The method includes firstly connecting positive and negative poles of a TIG welding machine to a workpiece and a tungsten electrode respectively, then connecting an exciting power output end to a field coil, connecting the field coil with a laser TIG composite welding head through a composite welding head connecting device, and determining a welding running path; and opening an exciting power supply to supply power for the field coil; opening shielding gas for welding and observing the weld seam formation condition. The method and the device have the advantages that the arc pneumatic pressure and the arc current density are effectively improved, so that the arc heat distribution is concentrated, the arc radius is compressed, the arc energy density and the arc stiffness are further improved, the stability of the welding arc in a laser arc composite welding process is improved, the coaxial composite degree of the laser and the arc during laser TIG arc composite coaxial welding is quite facilitated, and wide markets and application prospects are provided.

A laser quenching process of a car panel die surface comprises the steps of: firstly coating a coating on the surface of a die; then utilizing the laser emitted by a CO2 laser device to scan the surface of the die coated with the coating; and finally eliminating the coating on the surface of the die. The laser quenching process of the car panel die surface is characterized in that the painting ofthe coating comprises 60-70% by weight of Al2O3 particles, 10-22% by weight of ZrO2 particles and 12-20% by weight of SiO2 particles, which are then evenly dispersed by water with 20-50 percent of thepainting weight and finally coated on the surface of the die. The laser quenching process can replace processes such as the traditional high-frequency/medium-frequency quenching, flame surface quenching and the like, obtains a hardening layer with the depth of a millimeter level, has high and even hardness for the hardening layer and good process repeatability, leads the workpiece to keep a highpressure stress state, can be widely applied in the fields of metallurgy, chemical industry and heavy machinery equipment and the like, and significantly prolongs the service life of the workpiece.

A high-efficiency laser deep penetration welding method for achieving double-side forming of sheet metal through single-side welding is characterized in that a reflection cushion plate is added on the back of the laser welding sheet metal to utilize the reflection cushion plate to reflect instantaneous laser of laser full penetration sheet metal back to a welding area to conduct secondary heating on the welding area to further achieve a double-side forming hourglass-shaped (X-shaped) welding seam through single-side welding. The method is mainly composed of steps of cleaning the surface to be welded, fixing the reflection cushion plate, conducting laser welding on the sheet metal and the like. The method achieves the aim that the single-side welding is conducted on the sheet metal to achieve double-side forming under the low heat input condition, breaks through the defect that the existing sheet laser deep penetration welding can obtain the hourglass-shaped (X-shaped) welding seam only under the high heat input condition, achieves double effects of considering welding seam dynamic performance and controlling heat deformation and heat effects of the sheet and lays a foundation for promotion of wide application of a laser deep penetration welding technology in the sheet metal welding field.

The invention relates to a laser-TIG (Tungsten Inert Gas) arc rangefinder hybrid welding method with the addition of a high frequency magnetic field. The method comprises the steps of: 1) first, respectively connecting anode and cathode of a TIG welding machine to a workpiece and a welding gun, and then, connecting an exciting power supply output end to an exciting coil, and clamping the welding gun on a welding gun clamping mechanism of a hybrid welding head to determine a welding travel path; 2) opening an exciting power supply to supply power to the exciting coil; and 3) opening a protective gas to weld and observing formation of weld. Compared with the prior art, the laser-TIG arc rangefinder hybrid welding method with the addition of the high frequency magnetic field provided by the invention has the beneficial effects that as the high frequency magnetic field is added, the pneumatic pressure and the electric current density of arc are effectively improved, so that the arc heat is distributed more centralized and the arc radius is reduced, therefore, the arc energy density and arc deflection are further improved. Improvement of the arc energy density and reduction of radius of an arc column of the arc are very beneficial for enhancing the stable combustion capacity and impacting penetration capacity of the arc during laser-TIG arc rangefinder hybrid welding.

The invention discloses a high-speed laser spraying device adopting coaxial powder feeding. The high-speed laser spraying device comprises a supporting seat; the supporting seat comprises an outer supporting seat body and an inner supporting seat body; a gap is formed between the outer supporting seat body and the inner supporting seat body, and the outer supporting seat body and the inner supporting seat body are connected through a plurality of supporting ribs; a spectroscopic reflector and a shrinkage and expansion type nozzle are mounted at the top and the bottom of the inner supporting seat body correspondingly, and a focusing reflector is mounted at the top of the outer supporting seat body; the spectroscopic reflector, the focusing reflector, the shrinkage and expansion type nozzleand the supporting seat are coaxial; and a gas powder channel communicating with the shrinkage and expansion type nozzle is formed in the supporting seat. A single-beam collimation laser emitted froman opening in the focusing reflector is directly emitted to the spectroscopic reflector of a regular pyramid structure to obtain a plurality of reflecting light beams to achieve beam splitting, the reflecting light beams are emitted to the focusing reflector to obtain a converged light beam, and the converged light beam is focused at an outlet of the shrinkage and expansion type nozzle to form focusing light spots coaxial with the shrinkage and expansion type nozzle; under the effect of compressed gas accelerating airflow, powder is ejected from the shrinkage and expansion type nozzle to jointhe focusing light spots; and by adopting coaxial powder feeding, the purpose of high-speed laser spraying capable of reducing powder splashing is achieved.

The invention discloses a method for preparing a composite flying plate in laser indirect impact micro-forming. K9 glass is selected to serve as a sputtering substrate; titanium is selected to serve as a first sputtering target, aluminum is selected to serve as a second sputtering target, a Ti-Al composite film layer is obtained through magnetron sputtering for twice, and the Ti-Al composite film layer serves as an absorbing/ablation layer of a flying plate driven by lasers; metal foil or non-metal foil is adhered to the Ti-Al composite film layer; pressure is exerted between the flying plate and the Ti-Al composite film layer and the flying plate and the Ti-Al composite film layer are placed in a constant temperature device; the flying plate and the Ti-Al composite film layer are taken out from the constant temperature device so that the composite flying plate can be formed. The composite flying plate prepared through the method is high in laser energy use rate and good in completeness. The flying plate good in completeness can be obtained and forming performance is improved. The composite flying plates with different properties can be obtained through the adjustment of preparing parameters. The method for preparing the composite flying plate in laser indirect impact micro-forming is convenient to use, reliable, simple in technology, high in preparing efficiency, low in preparing cost and capable of being used in large-scale production and application in industry.

The invention provides an aluminum alloy thick plate multi-layer laser-TIG hybrid welding device and method. The device comprises two TIG electric sources, two TIG welding guns, a heater supply and alaser device. The two TIG electric sources are matched with the heater supply so three electric arcs different in power, position and effect are formed; the electric arcs are compounded with a laser beam, so the welding wire melting rate is significantly improved, the welding efficiency of filling and capping is improved, and the problem that in the process of melting a welding workpiece, the adaptability of a laser to an inter-groove gap is poor is solved. In the welding process, the rear side of a molten pool is provided with TIG electric arc shielding gas which is for preventing the moltenpool from oxidation, so a welding molten pool is protected from oxidation; and compared with MIG electric arcs, welding is more stable in the process of TIG electric arc welding, and the situation ofsevere welding splash is not easily caused, so the cleaning grinding procedure for a welding bead and a nearby zone to be welded can be removed after filling welding of each layer and the welding efficiency is improved.

The invention provides a fractional Fourier holographic femtosecond laser three-dimensional parallel processing and monitoring system and a fractional Fourier holographic femtosecond laser three-dimensional parallel processing and monitoring method. The system comprises a spatial light modulator, a Fourier lens, a first lens, a first spectroscope and a first focusing objective lens; the spatial light modulator is configured to receive a femtosecond laser beam and a fractional Fourier hologram and emit a plurality of paths of modulated light beams to a plurality of focusing planes; and after the light beams passing through the focusing plane sequentially pass through the first lens, the first spectroscope and the first focusing objective lens, a light spot array is focused at a plurality ofdifferent depths of a specific machining position. The system and method provided by the invention solve the problems about multi-dimensional scale machining and low efficiency, overcome the machining difficulty of a microstructure in a complex shape, effectively improve the machining quality and the machining efficiency of a microstructure in a three-dimensional distribution, improve the machining efficiency to one order of magnitude or above, remarkably shorten the machining time, and greatly improve the inter-structure position precision of three-dimensional distribution.

The invention discloses a swinging-focal spot roller surface laser texturing method, which is characterized in that: continuous laser beams output by a high-power continuous laser are focused on a certain working face of a prism which is rotating at a high speed and has misaligned rotation and prism axes; K paths of pulse laser beams which are transmitted in a direction vertical to the rotation direction of the prism and quickly swing are formed by the scanning and splitting of the prism; and the K paths of pulse laser beams are focused by K integrated focusing heads to produce K*N focal spots which swing quickly along the length direction of a rotating roller respectively so as to texture the surface of the roller at the same time to form irregular textured spot distribution of alternately arranged K*N non-spiral scanning line-point matrixes, wherein K is more than or equal to 1, N is the number of focal spots output by a single integrated focusing head correspondingly, and k*N is more than or equal to 2. When the roller processed by the method rolls a steel plate, scratches in the length direction of the steel plate are avoided, and the rolling quality of the steel plate is improved.

A laser marking device based on cone off-axis reflection is applied in the technical field of industrial measurement, in order to solve the problems of low utilization rate of laser energy and relatively low brightness of obtained word line laser in the prior art. The device comprises the following parts: a light source emitter, which is arranged on one end of a body and embedded into the body; the body, which is a hollow cylinder structure; a laser focusing beam expanding unit, which is arranged in the body coaxially with the light source emitter and is fixedly connected with the other end of the body; and a refractive structure, which is connected with the laser focusing beam expanding unit. The divergent light emitted from the light source emitter passes through the laser focusing beam expanding unit and converges, the convergent beam irradiates on the refractive structure, and the light beam passes through the refractive structure and forms a word line laser on the surface; and the obtained word line laser has the advantages of spot uniformity and good stability. The device is low in installation difficulty, simple in system structure and easy to implement; for engineering application in industrial measurement, the device has a 360 DEG ring light surface phase ratio with coaxial reflection; and the device can ensure the maximum energy utilization of the light source emitter.

The invention discloses an ultrahigh-speed laser cladding system and laser cladding method. The ultrahigh-speed laser cladding system comprises a laser device for generating a laser beam, a heating power source, a powder feeder and powder heating tube assemblies, wherein each powder heating tube assembly is composed of an outer ceramic tube, electromagnetic heating assemblies and an inner ceramictube, each inner ceramic tube is arranged in the corresponding outer ceramic tube, and the electromagnetic heating assemblies are arranged in each inner ceramic tube; the electromagnetic heating assemblies are arranged between each inner ceramic tube and the corresponding outer ceramic tube; the heating power source is connected to the electromagnetic heating assemblies through wires; the powder feeder communicates with the inner ceramic tubes through powder feeding tubes, and after normal-temperature metal powder in the powder feeder enters the inner ceramic tubes through the powder feeding tubes, the normal-temperature metal powder is heated into high-temperature metal powder by the electromagnetic heating assemblies in the inner ceramic tubes; and the extension line of the laser beam and the inner ceramic tubes intersect at a molten pool on the surface of a workpiece to be cladded. According to the ultrahigh-speed laser cladding system and laser cladding method, ultrahigh-speed laser cladding technology based on improvement of the initial temperature of the metal powder is achieved on the basis of traditional powder laser cladding technology for the first time, and the problem that the cladding efficiency of the powder laser cladding technology is low is solved.

The invention belongs to the technical field of part surface treatment, and relates to a graphene modified laser absorption layer coating and a coating method thereof. The coating is mainly composed of polyurethane resin, a black auxiliary material, a functional auxiliary agent and deionized water. After graphene modification, higher amplitude and deeper surface residual compressive stress distribution are generated on the surface of the part. The laser absorption layer coating is coated on the surface of a part in a high-pressure gas driven spraying mode, a coating with uniform thickness is obtained on the surface of a complex part after drying, the binding force between the coating and the part is good, and the coating can be removed through manual stripping after laser shock is completed. The method has the advantages of being high in coating efficiency, good in quality reliability, high in removal efficiency and the like, and machining and mass production of complex parts are facilitated.

The invention relates to a light beam separation module, a laser radar system and a control method thereof. The light beam separation module comprises a first light splitting assembly, an optical rotation assembly and a second light splitting assembly. The first light splitting assembly is used for separating the incident light beam into first P polarized light and first S polarized light; the optical rotation assembly is used for rotating the first P polarized light into second S polarized light and rotating the first S polarized light into second P polarized light; the second light splittingassembly is used for mixing the second P polarized light and the second S polarized light into a first emergent light beam emitted to a target object; the second light splitting assembly is also usedfor separating the echo light beam into third P polarized light and third S polarized light; the optical rotation assembly is also used for maintaining the polarization directions of the third P polarized light and the third S polarized light; and the first light splitting assembly is also used for mixing the third P polarized light and the third S polarized light into a second emergent light beam which is emitted to a laser detection module. According to the embodiment of the invention, the laser detection module can receive the P polarized light, and the energy received by the laser detection module is increased.

The invention discloses a high repetition frequency auxiliary ablation laser-induced breakdown spectroscopy aerosol detection device, which comprises an aerosol beam generation component, a laser-induced breakdown spectroscopy detection component and a detection component, the auxiliary ablation component is used for focusing the high-repetition-frequency laser on the aerosol beam and continuously exciting aerosol particles in the aerosol beam to pre-form plasma; the high-energy excitation part is used for enabling the high-energy pulse laser to be located at the plasma, so that the high-energy pulse laser excites the plasma before puncturing air; the spectral information acquisition part is used for acquiring optical radiation emitted by the excited plasma and acquiring spectral information of the optical radiation; and the data processing part is used for sequentially controlling the output of the high-energy pulse laser and the acquisition of optical radiation, and processing the spectral information to obtain the element composition of the aerosol to be detected and the content information of each element. According to the invention, the utilization rate of laser energy can be effectively improved, and the sensitivity of aerosol elements in detection is improved.

The invention discloses an auxiliary agent for laser welding, an application thereof and a welding method. The auxiliary agent for laser welding is composed of the following raw materials of, in partsby weight, 35-45 parts of copper oxide, 6-9 parts of aluminum, 19-25 parts of calcium fluoride, and 24-30 parts of calcium carbonate. By means of the auxiliary agent for laser welding, effective welding of an underwater wet-method laser welding technology at the water depth of 8 mm or below can be achieved, meanwhile, defects, namely, internal air holes of welding seams, generated through wet-method welding can be effectively reduced, and the welding seams can be protected. The auxiliary agent for welding is adopted for carrying out underwater wet-method laser welding, the porosity can be greatly reduced, and the porosity can reach 0.5% at the lowest, so that the underwater wet-method welding quality is effectively improved.

The invention discloses a laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding method. The hollow tungsten electrode arc changes the welding current density distribution and the arc pressure form by changing the shape of the tungsten electrode, so that the arc pressure is greatly reduced, very good welding seam forming is guaranteed, and tungsten electrode inert gas shielded welding is promoted to be developed towards the high productivity direction. However, when a hollow tungsten electrode is adopted, the current density, the temperature and the plasma flow velocity on the central axis of a TIG electric arc are obviously reduced, so that the melting capacity of a heat source welding wire is poor, and the deposition efficiency is not high in the welding process when the welding wire is filled. The composition of the laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding method comprises the welding wire (1), an insulating layer (2) and the hollow tungsten electrode (3), the insulating layer is fixed in an inner hole of the hollow tungsten electrode, the welding wire penetrates through the insulating layer, and the insulating layer is a ceramic tube. The laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding method is used for laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding.