56 results about "Laser quenching" patented technology

The invention discloses a galvanometer scanning-based curved surface self-adaptive dynamic light spot laser quenching method, which has the following beneficial effects: (1) dynamic regulation and control of a light spot energy field: a traditional uniform light spot is reconstructed into a self-defined light spot with an adjustable energy gradient according to a curvature value of a workpiece, so that the energy of each section of the light spot is dynamically distributed according to the curvature; and the energy density deviation caused by geometric deformation is compensated. And (2) scanning-energy cooperative control: through coupling optimization of a light spot form and a scanning path, galvanometer high-frequency galvanometer micro-swing scanning and laser output energy adjustment are adopted in a curvature sudden change area, so that accurate regulation and control of heat input are realized, a heat accumulation effect is inhibited, and depth uniformity (fluctuation is less than or equal to 10%) of a hardening layer is ensured. And (3) online feedback and closed-loop correction: an infrared thermal imager and a surface topography sensor are integrated, a quenching point temperature field and a hardened layer topography are monitored in real time, a light spot energy ratio and a scanning strategy are dynamically corrected through an AI algorithm, and the dynamic characteristics of material phase change in the machining process are adapted.

The present invention discloses a laser composite strengthening method with high surface hardness uniformity and its application. The laser composite strengthening method comprises: performing laser remelting along multiple remelting paths on the surface of a metal component to form a remelting layer, and there is overlap between adjacent remelting paths, and adjacent remelting spots in any remelting path overlap; performing multiple rounds of laser quenching along multiple quenching paths on the surface of the remelting layer to form a quenching layer, and in any round, there is overlap between adjacent quenching paths, and adjacent quenching spots in any quenching path are separated from each other, and for the quenching path, the spot positions between multiple rounds complement each other to form overlaps. The laser composite strengthening method provided by the present invention compensates for the thermal interference between the spots by performing laser quenching with a smaller spot size and smaller heat input on the surface of the remelting layer, and forming quenching paths with partial overlap through multiple rounds of complementarity, thereby forming a surface hardened layer with uniform hardness on the surface of the component.

The invention discloses a high-alloy steel nitriding-laser quenching composite surface strengthening method which comprises the following steps: sequentially polishing the surface of high-alloy steel by using 240-mesh waterproof abrasive paper and 2000-mesh waterproof abrasive paper, then sequentially putting the high-alloy steel into ethanol and acetone for ultrasonic cleaning, and nitriding the pretreated high-alloy steel to form a nitriding layer; and cooling to room temperature along with the furnace under the atmosphere of nitrogen or ammonia gas to obtain the high alloy steel containing the nitriding layer. And blackening treatment is conducted in the atmosphere of argon or nitrogen, then laser quenching treatment is conducted, and high alloy steel surface strengthening treatment is completed. According to the nitriding-laser quenching composite surface strengthening process, the problems that a high alloy steel nitriding layer is shallow (smaller than 0.2 mm), interface brittleness is achieved, and the retained austenite content is high (larger than 20%) are effectively solved, the total treatment time is shorter than or equal to 16 h, the surface hardness of a modified layer is larger than or equal to 600 HV0.1, the thickness of the modified layer is larger than or equal to 1.5 mm, and the nitriding-laser quenching composite surface strengthening process is suitable for preparing key components such as aviation gears and heavy-duty bearings.

The adapter fixture comprises a circular chassis, a clamping shaft is formed in the center of the rear end face of the chassis, a vertical rectangular connecting seat is formed on the front end face of the chassis, and a clamping seat with a mushroom-shaped horizontal section is formed on the front end face of the connecting seat; vertical adjusting grooves penetrating through the two side walls of the clamping seat are formed in the middle and the upper portion of the clamping seat, a transverse limiting stop shaft is inserted into the adjusting grooves, the two ends of the limiting stop shaft extend out of the two side walls of the clamping seat respectively, the middle of the limiting stop shaft is in threaded connection with a vertical adjusting bolt, and the adjusting bolt is pivoted to the clamping seat. The adapter clamp can be used for quickly clamping and positioning bacterial type blades of the same specification, and meanwhile, the adapter clamp can be adjusted, so that the clamping requirements of the bacterial type blades of different specifications can be met.

The invention discloses a machining method for a laser quenching cutter point, and belongs to the technical field of metal surface treatment and cutter machining. According to the method, efficient and uniform quenching of the cutter point is achieved through multi-beam laser composite scanning and artificial intelligence real-time feedback control; the method comprises the steps of workpiece pretreatment, multi-beam laser scanning, real-time monitoring and feedback control, post-treatment and quality evaluation. The method has the effects of reducing heat affected zones, improving hardening uniformity and reducing energy consumption.

The invention discloses a sheet material laser quenching device which comprises a purification box, supporting frames are arranged on the two sides of the outer wall of the top of the purification box, fixing mechanisms are arranged on the outer walls of the tops of the supporting frames, a supporting plate is arranged on the outer wall of the top of the purification box, and a laser quenching mechanism is arranged on the outer wall of the top of the supporting plate. An exhaust fan is arranged on the outer wall of one side of the purification box, the output end of the exhaust fan and the inner wall of one side of the purification box are provided with the same first guide pipe, a motor is arranged on the outer wall of one side of the purification box, the output end of the motor is connected with a rotating rod through a coupler, and stirring mechanisms distributed at equal intervals are arranged on the outer wall of the rotating rod. According to the laser quenching device for the sheet materials, the purification box is filled with the purification liquid, smoke and peculiar smell can be effectively absorbed and purified, harm to the bodies of workers caused by the smoke and the peculiar smell can be effectively prevented, and the cleanliness of the surroundings of the working environment is improved.

The invention relates to a processing method of a heteroaxial double-pin shaft part, which belongs to the technical field of laser quenching and comprises the following steps: S1, identifying whether workpieces exist at an upper pin station and a lower pin station of a quenching area or not and whether workpieces exist at the upper pin station and the lower pin station of a loading and unloading area or not; s2, in a quenching area, when it is recognized that a workpiece exists at an upper pin station, an upper pin of the workpiece is driven to rotate, when it is recognized that a workpiece exists at a lower pin station, a lower pin of the workpiece is driven to rotate, a laser head is controlled to be aligned with the circumferential faces of the upper pin and the lower pin of the workpiece, and the laser head is kept in a static state in the machining process; in the feeding and discharging area, the machined workpieces are taken out, the workpieces with only machined upper pins / lower pins of the workpieces are transferred to a lower pin station / upper pin station, and new workpieces are taken to the vacant lower pin station / upper pin station; s3, the quenching area and the feeding and discharging area are subjected to area exchange; and S4, repeatedly executing the steps S1-S3. The quenching device has the effect of improving the quenching efficiency and the quenching quality of the heteroaxial double-pin workpiece.

The application discloses a surface treatment process of a valve core, adopts tungsten carbide and nickel-based alloy composite design, and remarkably improves the service life of the valve core under extreme environment. By introducing laser quenching treatment, the surface hardness and wear resistance are enhanced, and defects such as cracks are avoided. By adopting plasma spraying technology, the tungsten carbide powder is melted and high-speed sprayed to the surface of the valve core by means of high-temperature plasma flame, a dense, uniform and well-bonded coating is formed, and the wear resistance, corrosion resistance and sealing performance are improved. In addition, the ion nitriding treatment is used to generate a high-hardness nitride layer, forming a "hard shell-tough core" structure, and prolonging the wear resistance life. Finally, the grinding and polishing treatment is used to improve the surface flatness and smoothness, and ensure the sealing reliability. The application combines multiple advanced processes, remarkably improves the comprehensive performance of the valve core, and guarantees the stable operation of the valve under complex and severe working conditions.

The utility model discloses an art knife laser quenching device which comprises a working table, a sealing box, a sapphire lens window and an art knife sample piece, a driving assembly capable of driving the art knife sample piece to move is arranged in the sealing box, and a protection support is further arranged at the top of the working table. A laser capable of being movably adjusted is arranged on the protection support, the laser is provided with two laser heads, and one laser can control the two laser heads to synchronously quench the two sides of an art knife sample piece at the same time. According to the art knife laser quenching device, the laser device is provided with the two laser heads, and the two sides of an art knife sample piece can be synchronously quenched at the same time; through cooperation of the laser modulator and the beam shaper, it is ensured that energy is evenly distributed in the quenching process, nitrogen is introduced into the sealing box to serve as shielding gas, oxidation of the tool in the quenching process is effectively prevented, and meanwhile cold nitrogen is used for conducting cooling and nitriding treatment on the tool in the quenching process.

1. The name of the design product: laser quenching machine. 2. The use of the design product: for laser quenching processing of metal workpiece surface. 3. The design points of the design product: in shape. 4. The picture or photo best indicating the design points: perspective view 1.

The present application relates to the technical field of surface strengthening of mining coal machine equipment parts, in particular to a kind of iron-based microalloy middle trough strengthening method, comprising: the pretreatment of middle trough matrix;Iron-based microalloy composite powder is prepared;Using Mobius topological scanning path and three-spot laser cladding process, bionic topological cladding layer is formed on the surface of matrix;Cladding layer is subjected to three-spot high-energy beam remelting treatment;Laser quenching is carried out on the non-cladding area of the bank, and gradient hardness layer is formed;Finally, post-processing is carried out.The beneficial effect is: the present application realizes the uniform dispersion of stress, the significant reduction of coal rock adhesion and the densification of cladding layer organization by the synergistic innovation of "structure-material-technology", the combination strength is high, the wear resistance, corrosion resistance is excellent, solve the problem of stress concentration, low bonding strength, high cost and short service life in the prior art, the service life is 3-4 times higher than traditional surfacing, suitable for the strengthening and remanufacturing of middle trough of coal mine scraper conveyor.

The present invention provides a laser quenching processing device for the surface of a high-speed railway lock hook, which relates to the field of laser processing technology. The device comprises a base, a fixing fixture is installed on the front side of the upper end of the base, a moving mechanism is installed on the rear side of the upper end of the base, the fixing fixture is used to fix the high-speed railway lock hook, a laser head is correspondingly provided on the upper side of the high-speed railway lock hook, the laser head is installed on the moving mechanism, the laser head is electrically connected to the laser through a signal line, a heat dissipation channel is provided on the side of the laser head, the inlet of the heat dissipation channel is connected to an air inlet pipe, the outlet of the heat dissipation channel is connected to an air outlet pipe, the air inlet pipe and the air outlet pipe are connected to a heat dissipation device, and the coordinated movement of the laser head and the high-speed railway lock hook is controlled so that the distance between the laser head and the high-speed railway lock hook in the up and down directions is the same during the scanning and quenching process of the high-speed railway lock hook, thereby ensuring that the propagation distance of the laser beam is the same, and improving the depth of the quenching layer of the high-speed railway lock hook and the uniformity of the quenching hardness.

The application discloses a method for laser cladding and laser quenching partition strengthening die hot stamping plated steel plate, simulates and analyzes three-dimensional contact and stress of a plated steel plate, a male die and a female die of a die, determines a laser cladding area, a laser quenching area and a geometric transition area connecting the two, mills the laser quenching area, makes a milled surface of the laser quenching area consistent with the shape and size of a forming die surface, pre-mills the laser cladding area and the geometric transition area, adopts a six-axis manipulator with a cladding head and a two-axis shifter to perform laser curved surface cladding on the pre-milled area, performs secondary milling on the laser cladding layer to obtain a well-cladded pre-milled area, quenches the laser quenching area after the milling, assembles the male die and the female die into a hot stamping die after laser cladding and laser quenching to perform hot stamping on the plated steel plate, reduces the friction coefficient between the die surface and the plated steel plate by means of the self-lubricating property of the laser cladding layer, and reduces the generation of powdering and micro-cracks of the plated steel plate.

The invention discloses an end effector with self-adaptive profiling and real-time monitoring of a laser quenching robot, which comprises an end effector main body mounted and fixed on the laser quenching robot, and the end effector main body comprises a shell, an angle adjusting assembly, a laser generator, a laser output head and a real-time monitoring assembly, the shell is fixedly mounted on the laser quenching robot, a first mounting groove is formed in the bottom of the shell, the angle adjusting assembly is arranged in the first mounting groove, the laser generator is arranged on the angle adjusting assembly, the laser output head is fixedly mounted at the bottom of the laser generator, and the angle adjusting assembly is used for adjusting the orientation of the laser output head at multiple angles. The device is reasonable in design, the posture of the laser output head can be adjusted in a self-adaptive profiling mode according to the shape and size of a workpiece, the quenching process of the workpiece can be monitored in real time, the machining quality of workpiece quenching is effectively improved, the rejection rate of the workpiece is greatly reduced, the production efficiency is improved, and the process adaptability is higher.

The utility model discloses a laser quenching system for a main hole of a steering gear box shell. The laser quenching system comprises a base, a quenching device and a driving assembly, wherein the base is provided with two rotatable quenching tables; the driving assembly is used for driving the quenching device to move between the two quenching tables; each quenching table comprises a rotatable disc body and a connecting piece for fixing a material; the two quenching tables are each provided with a first sensor used for recognizing material feature points. The first sensor is in signal connection with a driving motor of the disc body; and after the first sensor recognizes the feature points of the materials, the disc body stops rotating. The utility model solves the technical problem that the quenching time is prolonged as the quenching device adapts to the material angle during quenching, and achieves the technical effect of automatically adjusting the angle position of the quenching material.

The utility model relates to the field of laser processing equipment, in particular to a laser quenching device for processing shafts in a power plant, which comprises a workbench, a bearing ring is arranged on the workbench, the upper end face of the workbench is fixedly connected with a support frame, and the lower end face of the support frame is respectively and rotatably connected with an adjusting screw rod I and an adjusting screw rod II. The outer wall of the first adjusting lead screw and the outer wall of the second adjusting lead screw are both in threaded connection with sliding blocks, the two sliding blocks are both fixedly connected with electric cylinders, the output ends of the two electric cylinders are both fixedly connected with laser machining heads, and one end of the first adjusting lead screw is fixedly connected with a first sliding rod. According to the bearing ring quenching device, the supporting frame, the first adjusting lead screw, the first sliding rod, the second adjusting lead screw, the second sliding rod, the sliding block, the electric cylinder and the laser machining head are matched with one another, the inner wall and the outer wall of a bearing ring can be quenched at the same time, the machining efficiency is improved, and practicability is achieved.

The invention relates to the technical field of machining strengthening, in particular to multi-laser-beam cooperative spline shaft quenching, shot blasting and polishing integrated machining equipment and method, and the equipment comprises a workbench, and a workpiece fixing clamp, a laser quenching assembly, a laser shot blasting assembly, a laser polishing assembly and a laser power supply which are arranged on the workbench; the workpiece fixing clamp is used for clamping and positioning a workpiece to be machined. The laser quenching assembly is used for carrying out laser quenching processing on the workpiece; the laser shot peening assembly is used for performing laser shot peening processing on the workpiece; the laser polishing assembly is used for conducting laser polishing machining on the workpiece. According to the method, intelligent closed-loop manufacturing of high-performance composite reinforcement of the spline shaft and other complex workpieces is achieved, the problems that a traditional step-by-step technology is large in positioning error, remarkable in heat accumulation, uneven in reinforcement and the like are effectively solved, the machining efficiency is remarkably improved, the surface integrity is remarkably improved, and the fatigue life is remarkably prolonged.

The utility model relates to the technical field of laser quenching, in particular to laser surface quenching treatment equipment which comprises a mounting base, a driving assembly, a rotating assembly, a sliding block and a sliding groove, the driving assembly is arranged on one side of the mounting base and comprises a stepping motor, a driving shaft, a coupler, a lead screw and a lead screw block, and the rotating assembly is arranged on one side of the mounting base. The output end of the stepping motor is connected with a driving shaft, one end of the driving shaft is connected with a screw rod, the coupling sleeves the periphery between the driving shaft and the screw rod, the periphery of the screw rod is sleeved with a screw block, and one side of the screw block is provided with a laser through a hoop and a first screw; the novel laser quenching treatment device is provided with a structure for driving the laser to move in a lead screw transmission mode, the transmission precision is high, it is guaranteed that the laser keeps accurate positioning in the quenching process, then the uniformity and hardness of a quenching layer can be improved, and the laser quenching treatment effect can be effectively improved.

The invention discloses a motion trail detection system of a laser quenching machine, and particularly relates to the technical field of motion trail detection.The motion trail detection system comprises a laser irradiation device used for irradiating the surface of a workpiece through a laser beam, and a motion control system accurately controls the motion path of the laser irradiation device to detect the motion trail of the workpiece. The laser beam uniformly irradiates the surface of the workpiece on a preset track; the system further comprises a track detection unit and a feedback control module. By introducing the high-precision laser sensor and the image acquisition device, the movement track of the laser irradiation device can be monitored more accurately, and the change of the track is captured in real time, so that the quality of laser quenching and the uniformity of surface hardness are ensured, and the quality of laser quenching is improved by adopting a closed-loop control system. Therefore, the system can obtain data of the track detection unit in real time and feed back a control signal in real time for adjustment, the height consistency of the laser irradiation device and the preset track is ensured, and the precision and stability of the laser quenching process are greatly improved.

The invention discloses a laser quenching main shaft of an energy storage centrifugal compressor, a machining process of the laser quenching main shaft and the compressor. Wherein the main shaft is provided with a plurality of sections in the axial direction, each section at least comprises an end flange plate section, a thrust plate section, a first sealing section and a second sealing section, the end flange plate section is provided with a connecting hole connected with a driving part of the energy storage centrifugal compressor, and the thrust plate section is configured to be matched with a thrust bearing of the energy storage centrifugal compressor; the first sealing section and the second sealing section are configured to be directly matched with a sealing carbon ring of the energy storage centrifugal compressor; wherein the multiple connecting holes are evenly distributed with the center position of the main shaft as the circle center, the tolerance requirement of the connecting holes is phi 13H7, and the position tolerance of the connecting holes and the center line of the main shaft is phi 0.05 mm; and the surface hardness of the first sealing section and the second sealing section meets HRC58-62. Therefore, the assembling difficulty of the main shaft and the driving part can be reduced, the safety of equipment can be improved, and the shaft end sealing can meet the leakage rate control requirement.

The utility model discloses roller quenching equipment, and particularly relates to the technical field of roller processing, the roller quenching equipment comprises a quenching box, the inner wall of the quenching box is fixedly connected with a fixing device, the middle part of the inner wall of the quenching box is fixedly connected with a lifting support table, and the top of the inner wall of the quenching box is fixedly connected with a third motor; the output end of the third motor is fixedly connected with a second threaded rod, the outer wall of the second threaded rod is in threaded connection with a sliding seat, the lower end of the sliding seat is fixedly connected with a laser quencher, the upper end of the quenching box is fixedly connected with a cooling device, and the lower end of the quenching box is fixedly connected with a supporting frame. The roller quenching equipment disclosed by the utility model can be adjusted according to rollers with different sizes and shapes so as to ensure that the rollers are kept at optimal positions in the quenching process, the shock absorber can protect the stability of the whole production system, cold air can be jetted for cooling, the quenching quality can be better ensured, and the production efficiency is improved. And the stability and the consistency of the quenching process are improved.

The invention discloses a laser quenching method and device for the inner tooth surface of a planetary gear ring in the field of gear ring machining, and the laser quenching method comprises the following steps: step 1, integrally covering the circumference of the inner wall of the gear ring by using an annular laser ring, and simultaneously heating and quenching the inner tooth surface of the gear ring on the same circumference by using the annular laser ring; secondly, an annular laser ring is moved in the axis direction of the gear ring, so that the annular laser ring moves to the top of the gear ring from the bottom of the gear ring in the thickness direction of the gear ring, and quenching treatment of the whole inner tooth surface of the gear ring is achieved; and thirdly, the quenching area of the gear ring is rapidly cooled, so that a hardening layer is formed on the inner tooth surface of the gear ring. Synchronous quenching in the circumferential direction of the inner tooth surface can be achieved, a strengthening soft area is avoided, and therefore the gear performance is improved.

The invention provides a laser quenching device for machining pump body parts, and belongs to the technical field of quenching. Comprising a quenching base, the top of the quenching base is fixedly connected with a laser quenching mechanism, the bottom of the quenching base is fixedly connected with an operation base, the top of the operation base is symmetrically provided with sliding rails, the top of the operation base is rotationally connected with a rotating disc, and the operation base and the rotating disc are driven by a motor to rotate; the top of the operation base is fixedly connected with a rack; and the fixing assembly is used for fixing the relative position between the rotating disc and the balance disc, and the fixing assembly is connected with the sliding rail and the rotating disc. By arranging the fixing assembly, the balance disc can be rapidly positioned and fixed, the surface of the balance disc can be evenly coated with light absorption paint in the process that the balance disc is pushed to a designated position, the quenching effect is guaranteed, and the working efficiency is improved.

The utility model discloses a blade laser quenching processing device which comprises a six-axis robot and a processing machine tool main body, a clamping and rotating main machine head is installed on the processing machine tool main body, a blade handle of a blade to be processed is clamped on a three-jaw chuck of the rotating main machine head, and the six-axis robot is located behind the middle of the processing machine tool main body. A laser irradiation head is mounted at the end part of a mechanical arm of the six-axis robot and faces the surface of the part, needing to be quenched, of the blade; the outer wall surface of a to-be-quenched part at the left part of the blade is coated with an alloy powder layer; and laser of the laser irradiation head irradiates the alloy powder layer. A laser irradiation head is installed at the end of a mechanical arm of the six-axis robot, quenching is achieved by heating an alloy powder layer coated on a blade through laser, the hardness of the quenched position of the blade is further improved, and the six-axis robot can be automatically moved away when not in use, so that different use requirements of a machining machine tool body are met.

The application discloses a kind of P20 alloy steel laser quenching surface strengthening method, comprising the following steps: S1.Preprocessing: P20 alloy steel workpiece surface is treated with alumina grit blasting, after sand blasting, surface roughness Ra=1.5~3.0 μm is made;After sand blasting, the workpiece is cleaned;S2.Laser processing: laser beam is linear uniform speed scanning along the workpiece surface obtained in step S1, laser power is 1.8~2.0 kW, and scanning speed is 4~5 mm / s;S3.Cooling: the workpiece obtained in step S2 is cooled in 20~30 ℃ air cooling.Cooling.The application is realized through sand blasting pretreatment-precision parameter-normal temperature air cooling synergic process system, and the synergic promotion of laser absorption efficiency, heating uniformity, cooling stress release, fundamentally solves the core problem of "single link optimization cannot consider effect and efficiency".

This invention provides a laser quenching device for processing pump body parts, belonging to the field of quenching technology. It includes a quenching base, a laser quenching mechanism fixedly connected to the top of the quenching base, an operating base fixedly connected to the bottom of the quenching base, symmetrically mounted sliding rails on the top of the operating base, and a turntable rotatably connected to the top of the operating base. The operating base and the turntable rotate via a motor, and a balance disk is placed on the turntable. A rack is fixedly connected to the top of the operating base. A fixing component is also included, used to fix the relative position between the turntable and the balance disk, and connected to both the sliding rails and the turntable. By setting up the fixing component, this invention not only quickly positions and fixes the balance disk, but also uniformly coats the surface of the balance disk with light-absorbing coating while pushing it to the designated position, ensuring both quenching effect and improved work efficiency.

The application relates to the technical field of alloy steel processing, and particularly discloses a wear-resistant low-carbon pipeline steel pipe and a heat treatment method and application thereof. The heat treatment method of the wear-resistant low-carbon pipeline steel pipe provided by the application comprises the following steps: laser quenching treatment is conducted on the low-carbon pipeline steel pipe by using a laser with a spot width of 11mm-15mm, then the quenched area is subjected to air mist cooling, and the wear-resistant low-carbon pipeline steel pipe is obtained. By using the laser with the appropriate spot width to conduct the quenching treatment and by assisting the air mist cooling, the hardness of the low-carbon pipeline steel pipe is increased to above HRC40 without damaging the original high toughness of the pipeline steel, and the low-carbon pipeline steel pipe can be applied to oil and gas transportation containing impurities such as dust, so that the application range of the pipeline steel pipe is widened.

The invention provides a bearing inner ring curved surface laser quenching strengthening technology, and relates to the technical field of bearing machining, and the technology comprises the following steps: S1, workpiece pretreatment; s2, implementing laser quenching: dividing the outer side surface of the to-be-quenched bearing into a plurality of strengthening areas along the axis direction of the to-be-quenched bearing, dividing the inner side surface into a plurality of cooling areas, and sequentially carrying out laser quenching strengthening on the plurality of strengthening areas by utilizing laser equipment, and meanwhile, cooling equipment is used for continuously cooling corresponding cooling areas on the inner sides of the multiple strengthening areas, the cooling equipment comprises multiple hollow solid cooling blocks, cooling liquid continuously flows in the solid cooling blocks, and the surfaces of the solid cooling blocks are controlled to be attached to the cooling areas to achieve continuous cooling. According to the laser quenching device, efficient and accurate laser quenching and cooling of the bearing can be achieved, efficient control is achieved, and the laser quenching device is suitable for laser quenching strengthening of bearings wide in size and small in thickness.

The invention relates to the technical field of surface treatment, in particular to a laser composite strengthening process for repairing the surface of a carburized part. According to the laser composite strengthening process for repairing the surface of the carburized part, provided by the invention, laser cladding and laser quenching are performed in sequence, proper cladding and quenching process conditions are matched, so that a softening area of laser quenching is overlapped with a heat-affected area of laser cladding, and the heat-affected area of laser cladding is tempered by utilizing a softening effect of laser quenching, so that the surface of the carburized part is repaired. A hard and brittle region of laser cladding is eliminated, a hardness gradient which is gradually transited from the surface to the inside is realized, meanwhile, a grain structure of the surface layer of a cladding layer is refined through quenching, and high hardness and wear resistance are obtained. The process is simple, and carburized layer removal through machining and overall heat treatment are not needed.

The invention discloses a laser quenching process of a down-the-hole drill spline, which is characterized by comprising the following steps: S1, selecting a down-the-hole drill to be quenched, and carrying out surface cleaning on the curved surface of the spline; s2, setting energy density, and introducing a curved surface absorption coefficient correction factor eta (eta (theta) = k (1 + theta / 180)) according to the arc length and angle of the spline curved surface, wherein k is an absorption coefficient, theta is a central angle, E is equal to eta (theta) * (P / V) * S, E is energy density, P is laser power, V is laser rate, and S is light spot area; s3, a laser is started, continuous scanning quenching is conducted on the spline curved surface according to preset parameters, and the light spot center is kept consistent with the normal direction of the curved surface in the scanning process; and S4, the cooled down-the-hole drill bit is cut, and the quenched down-the-hole drill bit of the spline structure is obtained. A curved surface absorption coefficient correction factor is introduced, energy density is dynamically calibrated in combination with a spline curved surface central angle, accurate energy regulation and control are achieved, it is guaranteed that the hardened layer depth reaches the standard and is uniform, and the process stability is improved.