796 results about "Co2 laser" patented technology

The invention discloses a fast manufacturing method of three-beam laser compound scanning. The method comprises the following steps of: firstly utilizing long-wavelength laser (CO2 laser) for preheating the metal powder, then utilizing short-wavelength laser (YAG or optical fiber laser) for fusing the metal powder and finally utilizing long-wavelength laser (CO2 laser) to carry out heat treatment to the frozen metal. The fast manufacturing method uses the three beams of laser to carry out compound scanning, namely uses long-wavelength laser to preheat, short-wavelength laser to fuse and then long-wavelength laser to carry out heat treatment, can realize the compound process of preheating, fusion and heat treatment of the metal powder. The three beams of laser compound scanning mode can reduce internal stress of the metal part, avoid warping and cracking, improve organization and improve performance.

The invention discloses a reinforcing method of aluminium alloy surface fused and covered by laser, which comprises the following steps: 1. predisposing aluminium alloy base; 2. allocating laser fusing and covering material with the bulk rate of Al-Si alloy powder and SiC ceramic powder at 1:(4-2); setting the Si content in the Al-Si alloy at 10-15(wt%) with grain size at - 140-+325; setting the grain size of SiC at -200; 2. modulating evenly blended fusing and covering material into paste through soluble glass; coating on the surface of aluminium alloy with thickness at 0.8-1.2mm; drying at 100-150 deg.c for 0.5-2h; 4. adopting crossflow CO2 laser to irradiate the coated layer on the surface of aluminium alloy base; setting the output power of laser at 3-4kW and optical beam scanning velocity at 2-5mm/s and optical spot dimension at 1-4mm; protecting fusing pond through high-purity argon in the laser fusing and covering course with argon flow at 20-30L/min.

A laser cladding method for strengthening the surface of a piercing point includes the following steps of: (1) prefabricating WC/Co-base cladding powder; (2) pre-processing the surface of a piercing point workpiece, and cleaning up stain and rust; preheating for 2 to 5 hours at a temperature between 400 DEG C and 600 DEG C; (3) cladding the prefabricated composite powder fed in the way of reverse synchronization or coaxially in multiple steps by a CO2 laser; simultaneously, carrying out synchronous inert gas protection on the laser-cladding area; and (4) subsequent processing. The laser cladding method adopts laser to prepare a WC ceramic particle-strengthened Co-base composite coating on the surface of the piercing point, and the coating is metallically combined with the matrix, so the binding force between the coating and the matrix is enhanced; the maximum thickness of the coating can reach a few millimeters; and as the surfaces of WC particles are coated with Ni, the absorption of laser energy by the WC can be reduced, so that the burnout rate of the WC can be reduced in a laser melting pool. The distribution of the WC particles is uniform in the coating, the rigidity of the coating is high, consequently, the service performance of the piercing point can be improved, and the service life can be prolonged.

Drilling method of carbon dioxide laser includes steps: preparing locating point on layer next to the outer layer; before pressfitting added layer, browning oxidizing surface of target bonding pad; after pressfitting added layer, milling location hole / polishing edge, washing surface under high pressure; browning front surface of copper, thinning and coursing the surface before drilling hole by layer; first time to drill hole by laser; positioning film perforation by using plate location hole in original etching method for making window of copper, burning through copper foil and resin above the locating point on layer next to the outer layer so as to expose the locating point; second time to drill hole by laser; using the exposed locating point as position fixing to make micro hole inplate; washing surface under high pressure to remove browning layer after drill hole. The invention saves dry film and etching liquid, and raises process precision.

The invention relates to a preparation method for a micro-electro-mechanical system (MEMS) atomic vapor chamber and the atomic vapor chamber. The chamber is prepared by bonding a Pyrex glass sheet, a silicon wafer and a Pyrex glass sheet by an anodic bonding technology; the Pyrex glass sheet is taken as a window of the chamber; a chamber space is formed by etching or corroding the silicon wafer; paraffin packaged alkali metal such as rubidium (Rb) or cesium (Cs) is put into the chamber, and buffer gas with appropriate pressure is introduced simultaneously; paraffin is taken as a packaging material of the alkali metal, so that active alkali metal is isolated from oxidants such as oxygen, water vapor and the like in an environment; the paraffin is also used as a plating material of the chamber, so that collision between Rb or Cs atoms and a chamber wall is slowed down; and a CO2 laser is used for melting the paraffin to release the alkali metal, so that a uniform paraffin plating is formed on the chamber wall. The problem of long-term drift caused by reaction residues generated by a field preparation mode is solved, the collision between the Rb or Cs atoms and the chamber wall is slowed down, and the contrast of atomic resonance line width of the alkali metal is improved.

The invention relates to a vehicle mould quenching hardening process, which comprises the following steps: firstly detergent is used to remove oil and dust on the workpiece surface; secondly the Sio2 absorption coating material is sprayed uniformly on the vehicle mould surface in a pre-thickness of 0.02 mm to 0.05 mm with a brush; thirdly the Sio2 coating is naturally dried; fourthly a high power CO2 laser is applied to quickly scan the sprayed mould surface to achieve rapid surface heating and cooling. The laser power P is from 2,000W to 5,000W and the scan speed V is from 200 mm per min to 800 mm per min. The invention controls the surface uniform easily, improves the surface finish and dimensional accuracy of the stamping parts, greatly reduces the grinding time so as to improve the work efficiency and reduce the cost. In addition, the applied NC programming system can quench harden complex shaped moulds. The system is also fit for newly produced moulds without or with surface quenching process.

The plate forming process and apparatus belongs to the field of laser processing technology. The present invention has CO2 laser for pre-heating plate, infrared thermometer for measuring and controlling the plate heating temperature, neodymium glass laser for providing powerful short laser pulse to induce the generation of laser shock wave as the forming force source in processing plate and plate deformation measuring feedback device. The present invention is superior to laser thermal stress forming process, which has inferior formed surface quality, and laser shock forming process, which has small deformation amount, and can form plate directly in relatively great deformation amount, relatively high size precision and relatively high surface quality.

A compound welding method by using semiconductor laser and CO2 laser comprises the steps: using a semiconductor laser and a CO2 laser to be positioned on one side of a welding line of welded metals in a certain angle, adjusting a focusing position of the CO2 laser to cause a light spot of the CO2 laser to be positioned in the light spot of the semiconductor laser so that the welding direction is consistent with the slow axis direction of the semiconductor laser; using the semiconductor laser to pre-heat the welded metals, heating the part to be welded entering into the light spot of the semiconductor laser to 200-400 DEG C, using the CO2 laser to weld, and performing a post-welding thermal treatment to the welded metals by using the semiconductor laser for the welded parts of the welded metals welded by the welding of the CO2 laser. Due to synchronous pre-heating and post-heating treatments to the welding process, the invention can effectively solve the problem of cold cracking in high-strength steel welding and improve the quality of high-strength steel laser welding.

The invention belongs to the field of machinery cutting cutter manufacturing, and relates to a preparation method for a laser cladding soft and hard composite coating self-lubricating cutter. A rake face coating of the cutter is a multi-layer structure. Firstly, a hard coating of nano Al2O3 ceramic or an ultrafine cemented carbide, etc. is clad on the rake face of the cutter by utilization of a CO2 laser synchronous feeding manner, and then a self-lubricating soft coating is clad by utilization of nickel-covered MoS2 powder or nickel-covered WS2 powder. The cutter has characteristics of good toughness, high hardness, a self-lubrication function, and the like. During a drying cutting process, the hard coating bears loads and the rake face self-lubricating soft coating has low shearing strength, thus reducing friction between the cutter and chips, reducing the cutting temperature and the cutting force, and therefore cutter abrasion is reduced. The cutter can be widely used for dry cutting and cutting machining of difficult-to-machine materials.

A laser-markable acrylic and PVC composition (commonly known as Kydex®) is lased using a CO₂ laser to differentiate a laser etched graphic or pattern from the base material. A discoloration may be controlled to improve an appearance of the graphic or pattern. An embodiment uses a 500 to 2,500 watt CO2 laser to provide a raster or vector graphic pattern on the Kydex® finished part. Yet another embodiment is to use a 500 to 2,500 watt CO₂ laser to provide a seamless raster or vector graphic pattern on a large piece of Kydex® which can then be cut and divided into multiple finished parts. In this case, an embodiment would include providing the necessary software and process controls to insure that the seams between individual parts that make up a larger part are without lines of demarcation.

The invention relates to an engine crankshaft laser cladding repairing technology based on the following steps. A: the crankshaft surface is treated with oil removing stain removal; B: a DL-HL-T10000 type CO2 laser is selected; a working table with numerically-controlled machine tool is applied; an auto-feeding powder apparatus for laser is used to delivered a Fe-based or Ni-base self-fusing alloy powder to a molten pool, and the Fe-based or Ni-base self-fusing alloy powder is repaired and strengthed on the surface of the crankshaft. The technological parameter features that the cladding power P ranges between 1,000w and 10,000w; the spot dismeter D is between 2mm and 20mm; the scanning speed is at 200 mm per min to 2000mm per min; the overlapping rate is from 20 per cent to 40 per cent. The laser cladding technology of the invention features no pollution, high productivity, low energy consumption, small machining allowance and lower comprehensive cost. In addition, the laser cladding is good to the repair of the wear parts, such as strong associativity, small residual stress, no machining deformation, high surface hardness as well as good abrasion resistance, and becomes a process technology with great developing potential in repairing the components.

The invention provides a multi-laser-head laser cutting machine. The multi-laser-head laser cutting machine comprises a workbench, a laser cutting control system, a CO2 laser generator, a CO2 laser power supply, a CO2 laser reflector, at least one non-CO2 laser generator, for example, a fiber laser generator, a multi-laser-head cutting assembly, an X-axis movement assembly, a Y-axis movement assembly, a Z-axis movement assembly, a laser generator cooling system, an object carrying working table, a cutter console, a waste material collecting device and a dust collecting exhaust fan. Two or more than two laser sources are combined on the same laser cutting equipment by the multi-laser-head cutting assembly, so that the cutting processing of composites and the cutting processing of different single materials are realized.

The invention discloses a method for preparing TiC-TiB2 nanometer-micro complex phase ceramics coating, including the steps of: bonding granule, the gramularity of which is 30 Mum, is produced by ion densification granulating after mixing uniformly the reactive A selected from Ti or TiO2, the reactive B selected from boron, B2O3 or B4C, the reactive C, nanometer TiC and rare-earth oxide powder precursor; hot spraying Ni alloy base coat of 0.1-0.3mm on 45 steel base, then cold spraying a bonding granule of 0.5-1mm; coating liquid absorbing paint comprising nanomete oxide and other addition agent for improving absorptivity for CO2 laser on the surface of pre-assembly coating; TiC-TiB2 nanometer-micro complex phase ceramics coating is produced by laser-scanning the said pre-assembly coating. The invention can solve the defects that today' TiB2 coating has low cost, low efficiency, low toughness and poor binding force with based body.

A thorium-free low absorption coating for infrared CO2 laser optics comprises an interior BaF2 layer formed on a substrate and an exterior layer formed over the interior layer to a predetermined thickness sufficient to substantially prevent water adsorption by the interior layer. Generally, the predetermined thickness is greater than about 11000 ANGSTROM , and in one embodiment of a two-layer low absorption coating designed for antireflection at 10.6 microns, the exterior layer has a physical thickness in a range between about 24600 ANGSTROM and 22800 ANGSTROM , and preferably about 24000 ANGSTROM . In the preferred two-layer AR coating embodiment, the exterior layer defines a cover layer and an absentee layer, and the interior layer is relatively thin. The preferred exterior layer and the preferred substrate consist essentially of ZnSe. Multilayer stacked coatings of more than two layer can also be formed to provide low absorption partially reflective or totally reflective coatings as well as AR coatings.

The invention provides a laser drilling method and a laser drilling system. The laser drilling method comprises the steps of forming a hole boundary, wherein a pulse laser beam is emitted, scanning is conducted on a substrate where a hole needs to be drilled, and a boundary cutting groove of a preformed hole is formed; heating materials in the hole, wherein a CO2 laser beam is emitted, the CO2 laser beam and the preformed hole are aligned, and substrate materials of the preformed hole are heated for a preset period of time; forming a hole, wherein the substrate materials of the preformed hole are cooled, so that the substrate materials deform and then disengage from the substrate where the hole needs to be drilled. According to the laser drilling method and the laser drilling system, the problems that an existing laser drilling method is not suitable for substrates ultrahigh in chemical strength and the quality of the machined surface of the hole is poor are solved.

The invention discloses a laser cladding method of a composite coating containing spherical tungsten carbide, which is characterized by comprising the following steps of: cleaning a metal to be clad by using acetone to remove oil, and blasting sand onto the metal to coarsen the metal; presetting composite powder containing 5 to 50 percent of 0.5 to 2.0 millimeter spherical tungsten carbide and 50 to 95 percent of an iron or nickel based self-fluxing alloy on the surface of the metal; and performing the laser cladding of the metal by using a CO2 laser. In the laser cladding method of the invention, the spherical form of the tungsten carbide composite coating is unchanged, the wear resistance of the cladding is high, defects such as cracks and air holes are avoided, the production working procedures are simple and the working efficiency is high. The method is suitable to be used for metal surface treatment.

The invention discloses a tire laser marking device and a method based on a machine vision identity. The device comprises a production line conveyor belt, a clamping and rotating device, an information collection working region, a tire data reader, a mark position reader, an auxiliary lighting device, a smog extracting facility, a laser marking working region, smog filtering and air discharge equipment, a radio frequency CO2 laser, a focusing work bench, a high speed laser scanner, a scanning focus lens, a collimating and beam expanding system, a reflector and a computer system. The information required to be marked is etched on the surface of the tire through the machine vision identity technology and the laser beam high speed scanning and marking technology by utilizing the radio frequency CO2 laser. The invention has the beneficial effects that: through the machine vision identity technology, the marking position is automatically judged according to the different shapes and the arrayed positions of the tires on the production line and an optical beam scanner is guided to be positioned accurately without a special machinery and a manual marking locating device, then a seamless transition with the production line of the tires is achieved and the work efficiency of equipment is further improved.

The invention relates to a manufacturing technology of a novel hobbing cutter with a laser cladding WC wear-resistant coating. The manufacturing technology comprises the following steps: (1) manufacturing the hobbing cutter with a forging method, wherein the hobbing cutter is made of alloy steel; (2) carrying out peel removal cleaning treatment on surfaces to be machined of the intertooth space of an alloy cutter; (3) using a transverse flow CO2 laser, taking a numerical control machine tool as a workbench, and carrying out cladding wear-resistant strengthening treatment on the intertooth space of a cutter ring cutter, wherein the thickness of the WC cladding layer is 1.5-2.5mm; (4) carrying out performance detection on a composite coating. A laser surface cladding technology is adopted, and the tissues of a cladding coating mainly consist of carbides and a supersaturated solid solution superfine casting-state structure, wherein spherical tungsten carbide ceramics are of ultra-high hardness and uniformly distributed on a binding phase with extremely high hardness level, and also achieves an inhibition effect on abrasion, and the grinding resistance between hobbing cutter edges can be effectively improved; the binding phase is good in tenacity and high in strength, the formation of cracks can be effectively reduced, and the wear resistance and corrosive resistance of the hobbing cutter is improved, and the service life of the hobbing cutter is prolonged.

The treating process of laser smelting and coating nano anti-cracking ceramic coating onto the surface of metal substrate includes the following steps: bottoming the metal surface to be treated; spraying nano ceramic grain material; painting nano laser absorbing paint; and smelting and coating with high power CO2 laser under protecting Ar atmosphere. The nano anti-cracking ceramic coating formed on the surface of metal substrate has excellent physical and chemical performance.