19results about How to "Improve cladding efficiency" patented technology

The invention provides a composite sliding bearing laser cladding method and system based on image processing, and relates to the technical field of image processing.The method comprises the steps that a surface image of a composite sliding bearing is collected; performing high-definition reconstruction on the surface image; performing cladding path planning in the reconstructed surface image; constructing a heat conduction model for describing metal heating temperature distribution in the laser cladding process; establishing a description model of the isotherm position changing along with the laser power by combining the heat conduction model; linearizing and discretizing the description model at an expected control point; establishing a state feedback controller with a steady-state error compensation item based on the discrete state space equation; laser cladding is conducted on the composite sliding bearing along the cladding path, and the real-time cladding temperature of a molten pool is collected; and according to the real-time cladding temperature, the heat conduction model and the state feedback controller are combined, target laser power is output, and cladding is conducted on the composite sliding bearing according to the target laser power. And the cladding uniformity and the cladding efficiency are improved.

An online cooling method for laser additive manufacturing with surface hardness fluctuation ≤ 5HRC, relates to the field of additive manufacturing technology, and comprises the following steps: S1, preheating the cold rolling work roll, the preheating temperature is 300-350℃, and the preheating temperature fluctuation does not exceed ±25℃; S2, coaxial powder feeding; S3, air cooling after preheating; S4, applying cooling gas after air cooling; S5, dividing the cold rolling work roll into multiple sections along its axial direction, and cooling each section with cooling gas, the starting working position of the cladding head corresponds to the first section of the cold rolling work roll, and the cooling gas flow corresponding to each section decreases in sequence as the section is farther from the cladding head; S6, during the laser cladding operation, using a local cooling device to perform targeted cooling on the area with abnormally high temperature on the cold rolling work roll. The present invention can improve the problem of precise cooling and temperature control of different sections and improve the quality of ultra-high-speed laser cladding additive manufacturing of cold rolling work rolls.

The martensitic stainless steel flux-cored wire comprises a flux core and an outer skin, and the flux core is composed of, by mass, 12%-15% of chromium powder, 2%-4% of titanium powder, 6%-8% of molybdenum powder, 2%-4% of vanadium powder, 1%-3% of niobium powder, 0.2% of carbon powder, 0.5%-1% of tungsten carbide, 1%-2% of manganese powder, 0.3%-0.6% of silicon powder, 0.1%-0.2% of rare earth oxide and the balance iron powder; the invention further discloses a method for preparing a structural part through the martensitic stainless steel flux-cored wire, and the martensitic stainless steel flux-cored wire is used for additive manufacturing by adopting MIG welding as a heat source to obtain the structural part. Additive manufacturing of the martensitic stainless steel structural part is achieved through programming of the full-automatic welding robot, and efficiency is high; in the printing process, electric arc is stable, weld joint forming is attractive, the surface is smooth and clean, and pores and slag inclusion are avoided.

The invention discloses a flux-cored wire for a hydrogen-resistant coating of pipeline steel, which comprises an outer skin, the outer skin is filled with a flux core, and the flux core comprises the following raw material components in percentage by mass: 3%-5% of chromium, 1%-2% of molybdenum, 2%-3% of vanadium, 2%-4% of titanium, 0.5%-1% of aluminum, 0.4%-0.6% of silicon, 1.5%-3% of manganese and 81.4%-89.6% of iron. The preparation method of the flux-cored wire for the hydrogen-resistant coating of the pipeline steel comprises the following steps that the outer skin is obtained, and raw material powder is weighed according to the mass percent; the raw material powder is heated in an inert gas atmosphere and then subjected to heat preservation; the raw material powder is cooled to the room temperature, the outer skin is rolled into a U-shaped groove shape through a welding wire forming machine, the U-shaped groove is filled with the cooled raw material powder, and an original welding wire is manufactured after closed forming and roller treatment; and reducing the diameter step by step to prepare the flux-cored wire with a set diameter. The flux-cored wire for the hydrogen-resistant coating of the pipeline steel is short in preparation period and high in production efficiency, the performance can be improved by adjusting the components and proportion of the flux core, meanwhile, production of the flux-cored wire is free of pollution, and the cladding efficiency in the welding process is high.

The rapid preparation method of the anti-corrosion pipeline based on laser cladding comprises the following preparation steps that firstly, a pipeline anti-corrosion layer is arranged on the inner wall and / or the outer wall of a pipeline body; secondly, a laser cladding device is arranged at the starting end inside / outside the pipeline anti-corrosion layer; thirdly, cladding parameters of a laser cladding device are set; and fourthly, the laser cladding device clads the pipeline anti-corrosion layer on the inner wall and / or the outer wall of the pipeline body through laser according to the cladding parameters. The invention designs a brand-new anti-corrosion pipeline and a pipeline rapid anti-corrosion technology, and the pipeline anti-corrosion laser cladding efficiency is greatly improved while the pressure bearing capacity and the anti-corrosion effect of the pipeline are guaranteed.

The utility model relates to the field of laser cladding machines, in particular to a numerical control laser cladding machine which comprises a bottom plate, a movable seat and a clamp seat are fixedly mounted at the top of the bottom plate, the movable seat is slidably connected with a movable plate through a driving assembly, and a laser head and a powder feeding head are fixedly mounted at the bottom of the movable plate. A compatible plate is connected into the clamp seat in a sliding mode, the compatible plate is used for being matched with the clamp seat to clamp tubular or plate-shaped metal, and by means of the mode that the compatible plate is arranged on the base, on one hand, tubular or plate-shaped metal pieces can be clamped, and on the other hand, the compatible plate can be used for clamping the tubular or plate-shaped metal pieces; on the other hand, the time for replacing clamps with different clamping shapes is saved, the fusion covering efficiency of the metal piece can be effectively improved, the compatible plate can rotate the tubular metal piece through the arrangement of the pair of clamping rollers so that fusion covering of the whole outer wall can be conveniently conducted, and then the compatible plate can adapt to plate-shaped metal pieces with different thicknesses through the clamping pieces; the structure is simple, operation is convenient and practicability is high.

The invention provides a composite laser high-speed cladding device for shaft parts, and relates to the technical field of laser cladding, the composite laser high-speed cladding device comprises a base, the top of the base is provided with a clamping assembly, the clamping assembly comprises a sliding rail, the sliding rail is fixed on the base, the front end of the sliding rail is provided with a front plate, the rear end of the sliding rail is provided with a rear plate, and the front plate is fixed on the base. Sliding seats are fixed to the bottom of the front plate and the bottom of the rear plate and slide along the sliding rails, rotating discs are rotationally installed on the surfaces of the front plate and the rear plate through bearings, clamping blocks are arranged on the upper sides and the lower sides of the rotating discs, a part is clamped and fixed through the clamping assemblies and fed into a welding position, and the two sides of the part are wrapped with soft strips of the limiting assemblies. The laser assembly moves along the path of the soft strip, the distance between the laser assembly and the surface of the part can be automatically adjusted, the device is suitable for machining shaft parts of different shapes and sizes, the position of the laser device adjusted in the midway is omitted, and the machining efficiency is improved.

The invention relates to the technical field of bridge construction, particularly provides a manufacturing method of a bridge support and the bridge support, and aims to solve the problem that the consistency of the thickness of a stainless steel cladding layer is difficult to ensure when a cladding alloy layer is prepared on a curved surface. To this end, the bridge support of the present invention comprises: an upper base comprising a first contact surface; a lower base including a second contact surface; the spherical crown is arranged between the first contact surface and the second contact surface and comprises a lower contact surface close to the second contact surface; the manufacturing method comprises the following steps: pre-treating the first contact surface and the lower contact surface to obtain a pre-treated matching surface; enabling the laser and the alloy wire to synchronously act on the pretreatment matching surface; and enabling the laser and the pretreated matching surface to move relatively so as to form a cladding alloy layer on the pretreated matching surface. Based on the scheme, in the manufacturing process of the bridge support, the consistency of the thickness of the cladding alloy layer of the bridge support is good.

The present invention relates to the technical field of metal additive manufacturing, and specifically to a laser arc coaxial heat source coupled additive manufacturing device and a manufacturing method. The manufacturing device includes: a ring laser system, which uses a laser to emit laser light and transmits it to a laser mirror group, and the laser mirror group emits a hollow ring laser beam; a rotating tungsten pole TIG welding system, the rotating motor rotates to drive the fixed disk and the tungsten pole to rotate, the fixed disk and the ring laser beam are coaxial, and the tungsten pole passes through the inside of the ring laser beam; a wire feeding system, which is used to transport the metal wire to the molten pool. The present invention utilizes the rotation of the tungsten pole to make the generated TIG arc rotate, and the rotation of the TIG arc and the ring laser beam are coupled to form a coupled heat source. The rotating TIG arc will increase the heated area of ​​the area to be added and increase the cladding efficiency of the ring laser beam. The rotation of the TIG arc will also drive the flow of the molten pool and improve the spreadability of the molten metal. The ring laser beam is conducive to increasing the arc stability of the TIG arc, thereby improving the droplet transition form.

The utility model discloses a self-cleaning type laser cladding nozzle which comprises a nozzle, a nozzle support and a cleaning assembly, the nozzle is arranged on the lower side of the nozzle support, the cleaning assembly is arranged between the nozzle and the nozzle support, and the cleaning assembly comprises an air pump, a conveying pipe, an adjusting assembly, a connecting pipe, an annular flow dividing pipe and a high-pressure air outlet pipe. The air pump is fixedly installed on the upper side of the nozzle support, the conveying pipes are fixedly installed on the two sides of the nozzle support, and one ends of the conveying pipes are fixedly connected with the output end of the air pump. According to the laser cladding nozzle cleaning device, through the arranged cleaning assembly, when powder impurities splash and adhere to the surface of a laser cladding nozzle, impurities adhering to the surface of the laser cladding nozzle can be removed by starting the cleaning assembly, and the problems that an existing device needs to be shut down, and the production efficiency is high are solved. And then a cleaning tool is used for removing powder impurities from the surface of the laser cladding nozzle, so that the laser cladding efficiency is improved, and the service life of the cladding nozzle is prolonged.

The invention discloses a metal powder core type welding wire and method for surface modification of a furnace discharging table of a heating furnace, the metal powder core type welding wire comprises a powder core and a welding skin, the powder core is composed of the following components of, by mass, 35%-55% of Ni, 15.0%-17.0% of Cr, 15%-19% of Fe, 4.0%-5.0% of Nb, 2.8%-4.3% of Mo, 5.0%-15.0% of TiC, 0.5%-2.25% of Zr and 1.5%-2.5% of B, and the sum of the mass percentages of the components is 100%; the welding skin is a nickel-based alloy strip; the filling amount of the powder core powder in the metal powder core type welding wire ranges from 18 wt.% to 25 wt.%. The welding wire can be used for preparing a nickel-based alloy cladding layer on a heating furnace discharge roller way, and the hardness, wear resistance and corrosion resistance of the heating furnace discharge roller way are improved. The invention further discloses a preparation method of the metal powder core type welding wire and a method for modifying the surface of a furnace discharging roller way of a heating furnace.

The utility model discloses a heat exchange equipment laser cladding feeding device which comprises a fixed skirt and a shell support, a storage tank is installed on the fixed skirt, a feeding port is formed in the top of the storage tank, a discharging port is further formed in the bottom of the storage tank, the discharging port is communicated with a laser outlet of a cladding head, and the shell support is connected with the shell support. A belt wheel transmission mechanism used for being connected with a motor is fixed to the shell support, the lower end of the belt wheel transmission mechanism is connected with a driving gear, the driving gear is meshed with driven gears of different storage tanks through a gear shifting mechanism, one side of each driven gear is connected with an anti-caking turbine assembly, and each anti-caking turbine assembly comprises a rotating shaft. The turbine blade is fixedly connected with the rotating shaft, a scraping plate is arranged at the tail end of the turbine blade, a sieve plate assembly is arranged below the scraping plate in parallel, the scraping plate is rigidly connected with the rotating shaft, and the sieve plate assembly is detachably connected with the rotating shaft. The problem that the laser cladding efficiency is low due to material caking, accumulation and uneven heating in the laser cladding process is solved.

The invention discloses a duplex stainless steel metal type flux-cored wire for a 3D printing flange structural part and a method. Flux core alloy components in the metal type flux-cored wire comprise, by mass, 22%-28% of chromium powder, 1%-2% of titanium powder, 2%-4% of aluminum powder, 6%-8% of molybdenum powder, 2%-3% of copper powder, 5%-7% of niobium powder, 0.03% of carbon powder, 1%-2% of manganese powder, 0.3%-0.6% of silicon powder, 0.1%-0.2% of chromium nitride and the balance iron powder, and the sum of the mass percentages of the components is 100%. The duplex stainless steel structural part obtained through 3D printing is attractive in shape, excellent in mechanical property and good in corrosion resistance, and the use requirements of flange structural parts are completely met.

This invention discloses an ultrasonic vibration-assisted full-domain transient cladding device and method in the field of surface strengthening technology for components. The cladding chamber is equipped with an inert gas cylinder, an ultrasonic generator, and a vacuum pump on its exterior. Inside the cladding chamber, from top to bottom, are arranged an ultrasonic vibrating head, a perforated graphite felt, coating powder, a workpiece, and a third telescopic motor. The top surface of the workpiece is covered with a layer of coating powder. The perforated graphite felt has through-holes, and an ultrasonic vibrating head extends into one of the holes in the perforated graphite felt. Using air as a carrier, ultrasonic vibration is transmitted to the cladding layer. The workpiece itself does not vibrate, allowing the metal dendrites in the cladding layer to fracture during metal crystallization, promoting the growth of new crystal nuclei and achieving grain refinement. After the cladding layer is formed, the DC power supply is turned off, but the ultrasonic vibrating head continues to operate. The cladding layer of the workpiece impacts the ultrasonic vibrating head, forging the cladding layer and further improving its plasticity and mechanical properties.

The invention belongs to the technical field of welding, and particularly relates to a single-tungsten high-current high-frequency double-pulse double-hot-wire surfacing method. The high-frequency double-pulse current is adopted as the main welding current for welding, meanwhile, the pulse frequency of the large pulse current stage and the pulse frequency of the small pulse current stage are limited to be larger than or equal to 5000 Hz, the arc pressure can be reduced along with increase of the pulse current frequency, and therefore large-current welding can be carried out when the arc voltage is controlled to be smaller than or equal to 25 V; therefore, the occurrence of hump welding beads in high-speed welding is reduced. According to the method, high-frequency double-pulse current is adopted, the distance between molten pools can be effectively reduced, and therefore the incomplete fusion defect is not prone to occurring; and meanwhile, the high-frequency double-pulse current can cause molten pool oscillation, and the effects of refining crystal grains and reducing air holes are achieved. Compared with single-path wire feeding, two-path wire feeding is adopted, the cladding rate is higher, the dilution rate is lower, and practical significance is achieved for surfacing application.

The utility model discloses an angle-adjustable multichannel collaborative laser cladding head, which belongs to the technical field of laser cladding and comprises a powder feeding joint, a tube seat, at least two adjusting components, at least two cladding nozzles and at least two connecting tubes, the pipe seat is rotationally connected to one end of the powder feeding connector, the at least two adjusting assemblies are annularly and fixedly connected to the outer side of the pipe seat, the at least two cladding nozzles are rotationally connected with the pipe seat through the adjusting assemblies, the at least two connecting pipes communicate with the cladding nozzles and the pipe seat, and powder is conveyed into the cladding nozzles. The laser cladding head is provided with a plurality of cladding nozzles, so that the uniformity of laser coating can be further improved, and the laser cladding head can be better suitable for cladding treatment of workpieces in different shapes by adjusting the angle of the single cladding nozzle through the adjusting assembly; the multi-angle cooperative work of the multiple cladding nozzles of the laser cladding head can effectively improve the flexibility and uniformity of the cladding process, so that the cladding efficiency and quality are improved.

This invention discloses a coaxial powder feeding nozzle for laser cladding, relating to the field of metal cladding technology. The coaxial powder feeding nozzle includes a base, a laser generating mechanism mounted on top of the base, a powder feeding mechanism fixedly mounted on the outside of the base, and a nozzle connected through a channel tube at the bottom of the base. Four fourth sliding grooves are formed at equal angles along the circumference of the nozzle's interior. A rotating seat is rotatably mounted at the lower end of each of the four fourth sliding grooves, and a connecting pipe is fixedly mounted through the rotating seat. A slag removal component is provided between the rotating seat and the nozzle. The connecting pipe is connected to the base via an adjusting component. By using the connecting pipe and the adjusting component, the distance between the laser beam and the powder intersection point can be adjusted according to the different materials and fineness of the powder. Simultaneously, by using the adjusting component and the slag removal component, the slag removal component can clean the powder accumulated at the lower end of the connecting pipe and the bottom of the rotating seat.

The utility model discloses a heat exchange equipment laser cladding machine tool, which relates to the technical field of laser cladding machine tool equipment and comprises a machine tool base, a first-stage swing arm, a second-stage swing telescopic arm and a third-stage telescopic arm. The I-level swing arm is rotatably connected with the machine body stand column through an I-level gear transmission component and an I-level stepping motor, the II-level swing telescopic arm is rotatably connected with the I-level swing arm through an II-level gear transmission component and an II-level stepping motor, a fixed clamping jaw is arranged at the tail end of the II-level swing telescopic arm and grabs the III-level telescopic arm, and the III-level telescopic arm is fixedly connected with the I-level swing arm. A material storage tank is arranged at the bottom of the III-stage telescopic arm, and a cladding head is arranged at the bottom of the material storage tank; a supporting arm is further arranged at the tail end of the I-level swing arm, and a rotating wheel is arranged at the bottom of the supporting arm. According to the laser cladding device, the problem of low laser cladding efficiency caused by limitation of degree of freedom in the laser cladding process can be solved.

The invention discloses a super duplex stainless steel flux-cored wire with high toughness and hydrogen resistance and a preparation method, the super duplex stainless steel flux-cored wire comprises a welding skin and flux core powder filled in the welding skin, and the flux core powder comprises the following components: Cr, Ni, Mo, TiN, Nb, Mn, Si and iron powder. During preparation, the raw materials are weighed according to the percentage and are heated and subjected to heat preservation in the inert gas atmosphere, and flux core powder is obtained; then selecting an outer skin and rolling the outer skin into a U-shaped groove through a forming machine; and the U-shaped groove is filled with flux-cored powder, and the flux-cored wire is formed through a closed forming roller and a step-by-step diameter reducing method. The problem that in the prior art, a super duplex stainless steel flux-cored wire is difficult to have high strength and high hydrogen resistance at the same time is solved, and the strength of a welded joint is greatly improved.