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169 results about "Wear particle" patented technology

Fusion decision-based equipment wear stage identification method and system

The invention belongs to the technical field of mechanical equipment wear state monitoring. The method comprises the following steps of: extracting wear rate characteristics, wear degree characteristics, cutting index characteristics, fatigue index characteristics and oxidation index characteristics in an abrasive particle sample image, and respectively clustering to obtain five groups of discrete stage labels; carrying out normalization processing on the five groups of discrete stage labels to obtain a normalized data matrix; according to the data matrix, weights corresponding to all the features are calculated in multiple modes, and the average value of the weights calculated in the multiple modes serves as the final weight of all the features; according to the final weight of each feature and the normalized data matrix, calculating a comprehensive score sequence of all the abrasive particle sample images; performing clustering according to the comprehensive score sequence to obtain a plurality of optimal clustering centers, and determining a current wear stage according to the optimal clustering centers; and more comprehensive and more accurate division of the wear stages is realized.
Owner:SHANDONG UNIV

Online monitoring device and method for wear particles of water-lubricated bearing by fusing electrostatic induction and optical imaging principles

The invention discloses an electrostatic induction and optical imaging principle-fused online monitoring device and method for wear particles of a water-lubricated bearing, and belongs to the field of state monitoring of mechanical equipment. The device comprises a square insulation detection cavity, a detection electrode array, an electromagnetic shielding shell, a high-speed optical imaging module and a signal processing unit, the square insulation detection cavity is installed in a bearing lubrication water loop. The detection electrode array is fixed to the outer wall of the cavity and used for capturing electrostatic signals generated when the abrasion particles pass through. The electromagnetic shielding shell wraps the detection cavity and is grounded through a wire to eliminate environmental electromagnetic interference. The high-speed optical imaging module integrates a high-magnification microscope lens and a CMOS sensor, is coaxially mounted with the detection cavity, and obtains the morphology characteristics of the wear particles in real time; and the signal processing unit performs multi-modal data fusion analysis on the electrostatic signal and the optical image. Through cooperative detection of electrostatic induction and optical imaging, the monitoring precision and reliability of the wear particles of the water-lubricated bearing are remarkably improved.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY

Surface wear volume space-time distribution prediction method combining abrasive particle and vibration monitoring

PendingCN120910686AMeasurement devicesBiological modelsProbability representationWear particle
The invention discloses a surface wear volume time-space distribution prediction method combining abrasive particle and vibration monitoring, which comprises the following steps: constructing an abrasive particle size distribution driven Markov process, representing a random wear process, and realizing dynamic and probability representation of real-time wear volume time evolution; a physically constrained double-branch mapping model is constructed, fuzzy mapping of the surface wear volume and the vibration time-frequency characteristics is established, and precise observation of wear volume space distribution is achieved; the two physical mechanisms are fused on the basis of a state space modeling framework, a digital twinborn model combining abrasive particle monitoring and vibration monitoring is constructed, and accurate prediction of the abrasion volume of the friction pair part in the time dimension and the space dimension is achieved. According to the method, the wear volume space-time distribution is predicted by fusing the wear particle information and the physical correlation between the vibration characteristics and the wear process, and the precise monitoring of the wear process is realized.
Owner:XI AN JIAOTONG UNIV

Wind power gear box wear state evaluation method and system fusing vibration and oil

The invention belongs to the technical field of gear box wear state evaluation. The invention provides a vibration and oil fused wind power gear box wear state evaluation method and system, and the method comprises the steps: converting a vibration signal of a wind power gear box into a time-frequency domain image through employing a Markov transfer field, carrying out the resampling of the time-frequency domain image, and obtaining a vibration two-dimensional time-frequency graph with the same pixel as a two-dimensional image of an abrasive particle ring; performing down-sampling on the two-dimensional image of the abrasive particle ring and the two-dimensional time-frequency image of the vibration, fusing the two-dimensional image of the abrasive particle ring after down-sampling and the two-dimensional time-frequency image after down-sampling, and performing up-sampling on a fusion result; and obtaining a wear state evaluation result according to an up-sampling result. According to the method, feature selection deviation caused by subjective factors is avoided, and the accuracy and robustness of wear state recognition are improved.
Owner:SHANDONG UNIV

Polishing performance evaluation method and device and polishing system for improving polishing performance

The invention relates to a polishing performance evaluation method and device and a polishing system for improving the polishing performance. The polishing performance evaluation method comprises the steps that the track lengths of all abrasive particles of a polishing disc are obtained; based on the track lengths of all the abrasive particles, calculating to obtain a track average value and a variance; and based on the trajectory average value and the variance, trajectory distribution uniformity is obtained through calculation. The wafer polishing device has the advantages that the rotating motion of the polishing disc unit and the linear motion of the polishing pad unit are combined, so that the wafer polishing uniformity can be improved, the polishing time is shortened, and the polishing efficiency is improved; the rotating motion of the polishing disc unit and the linear motion of the polishing pad unit are combined, so that uneven abrasion of the polishing pad unit can be avoided, the service life of the polishing pad unit is prolonged, and the cost is reduced.
Owner:SHANGHAI LEADING SEMICON TECH DEV CO LTD

Friction pair wear state observation method and system based on online abrasive particle detection

The invention belongs to the field of fault diagnosis, and particularly discloses a friction pair wear state observation method and system based on online abrasive particle detection. According to the method, the dynamic modeling method on the macroscale and the model parameter estimation method combining the abrasive particle information and the machine learning thought are used, so that the initial state and the model parameters of the model can be further obtained on the basis of the theoretical model; according to the wear state observation method, the limitation that a microscopic model is prone to falling into actual wear complexity can be overcome, and a macrodynamic model capable of representing the actual wear state can be obtained through data-driven parameter estimation, so that the wear process of a mechanical system is diagnosed in real time by utilizing online abrasive particle detection information; and the purpose of tracking and predicting the wear state is achieved.
Owner:HUAZHONG UNIV OF SCI & TECH

Optical glass structure with high-hardness scratch-resistant coating

The invention belongs to the technical field of optical glass, and discloses an optical glass structure with a high-hardness scratch-resistant coating, which comprises the following structures: a chemically strengthened glass substrate; the refractive index gradient transition layer is deposited on the surface of the substrate; and the diamond-like carbon-based hard coating covers the surface of the transition layer. The defect is thoroughly overcome through a gradient strengthening system, the diamond-like carbon coating resists invasion of external abrasion particles through a crystal bonding network close to absolute hardness, so that the surface microhardness breaks through the upper limit of a brittle material, the gradient transition layer constructs an elastic buffer strip below the coating, impact stress is dissipated through the porous nano laminated layer, and the hardness of the coating is improved. The cooperation of the two ensures that no visible scratch is generated on the glass surface even if the glass surface is exposed to a high-wear environment for a long time, thereby fundamentally blocking linkage failures such as light path scattering, imaging blurring and dispersion imbalance caused by surface damage, and ensuring that the light transmittance of a precise optical system in the whole life cycle is stabilized at a theoretical extreme value.
Owner:CHANGZHOU SOJIN OPTOELECTRONIC CO LTD

Abrasion-resistant high-strength steel for power transmission tower and preparation method thereof

The invention discloses wear-corrosion-resistant high-strength steel for a power transmission tower and a preparation method thereof, and belongs to the technical field of metal materials. The wear-corrosion-resistant high-strength steel for the power transmission tower provided by the invention has good corrosion resistance and wear resistance, has excellent wear resistance in a soil environment of sulfate ions with the concentration of 300 mg / kg-50000 mg / kg and chloride ions with the concentration of 500 mg / kg-10000 mg / kg, and meets various environmental performance requirements of an acid soil environment, an atmospheric corrosion environment and the like. In an acid soil environment, the corrosion resistance is more than 8 times that of plain carbon steel, and the relative corrosion rate is lower than 10%; compared with Q355B, the corrosion rate of atmospheric corrosion resistance is lower than 40%, and the abrasive wear rate is 26.5%-28.0%; and through reasonable matching of corrosion-resistant elements, the requirements of corrosion resistance in various environments are met. The yield strength is 775 MPa-805 MPa, the tensile strength is 952 MPa-985 MPa, the percentage elongation after fracture A50 is larger than or equal to 28%, the low-temperature impact toughness at the temperature of-60 DEG C is larger than or equal to 260 J, meanwhile, the forming performance is excellent, and the 180-degree cold bending requirements that d is equal to 1.0 a are met.
Owner:BENGANG STEEL PLATES CO LTD

Online monitoring system and method for oil of gearbox of wind turbine generator

The invention discloses an on-line monitoring system and method for gearbox oil of a wind turbine generator, belongs to the technical field of gearbox oil monitoring, and solves the problem of how to improve the real-time performance and accuracy of gearbox oil monitoring. According to the invention, multiple sensors are deployed to cooperatively collect oil quality information signals and vibration signals, monitoring is carried out from multiple dimensions of the oil state, and the limitation of monitoring of a single parameter is effectively avoided; by monitoring the oil viscosity, the moisture content and the abrasive particle index of the gear box in real time, the abnormal state caused by lubrication failure or abrasion aggravation can be recognized, and the non-planned shutdown loss can be reduced through a predictive maintenance strategy formulated based on the oil parameter change trend; by monitoring moisture and metal particles in the oil, secondary abrasion caused by lubrication degradation can be effectively inhibited, all-weather state monitoring is conducted on the gear box, safety accidents caused by sudden failures are avoided, and the real-time performance and accuracy of monitoring of the oil in the gear box are effectively improved.
Owner:DATANG GUOXIN BINHAI OFFSHORE WIND POWER CO LTD +2

Constant-force grinding device for grinding automobile parts

The invention discloses an automobile part grinding constant-force grinding device, and relates to the technical field of constant-force grinding, the automobile part grinding constant-force grinding device comprises a longitudinal adjusting assembly, a transverse adjusting assembly, a clamping assembly, a grinding assembly and a grinding wheel wear monitoring assembly, the three-direction force sensing module is used for measuring the stress variation of the clamping assembly in the X-axis direction, the Y-axis direction and the Z-axis direction, the total grinding force direction and amplitude are obtained, the control terminal receives data and controls the Y-axis motor, the X-axis motor and the Z-axis motor to conduct position compensation on the clamping assembly, the grinding force is adjusted in real time through closed-loop feedback control, quick response is achieved, and the grinding efficiency is improved. A longitudinal damping vibration attenuation module and a transverse damping vibration attenuation module are arranged in the grinding assembly, damping force is changed through current, the influence of vibration on grinding force adjustment is reduced, the grinding wheel abrasion monitoring assembly can obtain abrasion data of abrasive particles on the surface of a grinding wheel through a laser detection module, and the abrasive particles can be replaced in time after abrasion exceeds a threshold value.
Owner:DISPOS INTELLIGENT MFG TECH (NANTONG) CO LTD

Guide structure and magnetorheological damper with same

The utility model discloses a guiding structure and a magneto-rheological damper with the guiding structure, and relates to the technical field of guiding structures, the guiding structure comprises a guiding sleeve, a dustproof sealing ring, a guiding bearing, a buffering sealing ring and a static sealing ring, a dustproof sealing ring is arranged at the outer end of an inner hole of the guide sleeve, a buffering sealing ring is arranged at the inner end of the inner hole of the guide sleeve, the inner diameters of the dustproof sealing ring and the buffering sealing ring are matched with the piston rod, a static sealing ring is arranged between the guide sleeve and a cylinder body of the piston cylinder, and a guide bearing is arranged on the inner side of the buffering sealing ring. The buffering sealing ring can prevent iron powder particles from entering the guide sleeve, abrasive particle abrasion to the guide bearing is prevented, the service life of the guide sleeve and the service life of the guide bearing are prolonged, the sealing reliability is improved through two-end sealing, and friction force between the guide sleeve and the piston rod is reduced; assembly operation is simple, the device is suitable for automatic assembly production, the structure is simple, parts are few, and the production cost can be greatly reduced.
Owner:BEIJING PINGZHEN TECH CO LTD

Real-time monitoring and maintenance system for wear state of ship main transmission device

The invention relates to the technical field of state monitoring, in particular to a ship main transmission device wear state real-time monitoring and maintenance system which comprises a load path recognition module, an abrasive particle distribution monitoring module, a thermal field response judgment module, a crack evolution tracking module and a maintenance adjustment module. According to the method, the strain data of the front end and the rear end of the main shaft are subjected to time sequence comparison, so that the strain transfer trend in a transmission path can be dynamically captured, and path parts in an abnormal abrasive particle peak value state can be screened out in combination with the mapping relation between the number of particulate matters and the particle size grade; according to the method, a potential thermal response imbalance area in a local structure is identified by combining the change trend of the difference between the axial temperature rise rate and the radial temperature rise rate, meanwhile, pre-judgment of a crack initiation section is completed by combining the peak sudden change characteristic of the number of structural node strain fluctuation times, and real-time identification, trend study and judgment and risk early warning of the running state of the main transmission device are achieved. And timeliness and accuracy of maintenance response are improved.
Owner:NO 703 RES INST OF CHINA SHIPBUILDING IND CORP +1

Abrasion resistance detection method and equipment for gantry machine tool spindle system

The invention discloses a wear resistance detection method and equipment for a gantry machine tool spindle system, and relates to the technical field of machine tool spindle state detection.The method comprises the steps that when a spindle runs, torque and rotating speed signals are collected firstly, and friction power input energy is calculated; synchronously collecting a main shaft and lubricating oil feature set to establish heat loss energy, and calculating acoustic emission energy by using an acoustic emission array; executing oil detection to establish abrasive particle generation potential, and calculating equivalent wear energy to obtain a first path wear detection result; activating the ultrasonic sensor to obtain a second path of wear detection result; and outputting a wear resistance detection result after interactive authentication. The gantry machine tool spindle system wear resistance detection method solves the technical problems that the gantry machine tool spindle system wear resistance detection means is single, the wear state cannot be reflected in real time, only the local physical quantity can be captured, detection data are one-sided, and accuracy and reliability are insufficient, and achieves multi-dimensional real-time comprehensive detection of the gantry machine tool spindle system wear resistance. And the comprehensiveness, the accuracy and the reliability of the detection data are improved.
Owner:NANTONG HONGHAN INTELLIGENT EQUIP CO LTD

Substrate-less abrasive material and method for manufacturing the same

The present invention employs a configuration without a base material, and provides a base material-less abrasive material that flexibly deforms to conform to the surface of the object to be polished, especially if the surface has a curved shape, and has good polishing characteristics. The substrate-less abrasive material 1 of the present invention does not have a substrate, and a plurality of abrasive grains 2 are held in a dispersed state in a base portion 3 which contains a total of 60 volume% or more of at least one of the base components of resin and elastomer. The type A durometer hardness measured in accordance with the hardness test specified in JIS K7311-1995 is 50 to 80, the tensile strength is 70 to 250 MPa, and the tensile elongation is 10 to 360%.
Owner:SANKYO RIKAGAKU

Functional structure integrated optimization polishing pad capable of uniformly removing materials

The invention discloses a functional structure integrated optimization polishing pad capable of uniformly removing materials. The functional structure integrated optimization polishing pad comprises a polishing layer and an elastic layer, the polishing layer is composed of a plurality of protrusions, and the protrusions are arranged in a honeycomb shape. The elastic layer is of a concentric partition structure and comprises a soft area and a hard area. By designing surface patterns of the polishing pad, abrasive particle tracks on the surface of the workpiece are uniformly distributed; by designing the polishing pad structure, the contact pressure on the surface of the workpiece is uniformly distributed. The surface pattern and structure of the polishing pad are subjected to comprehensive optimization design, integrated optimization of the functional structure of the polishing pad is achieved, the abrasive particle motion trail and contact pressure distribution can be cooperatively regulated and controlled, and the material removal uniformity of the surface of a workpiece is improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

A method of heat treatment of a wear particle resistant coating and an apparatus therefor

The application relates to the technical field of coating preparation, in particular to a wear particle wear-resistant coating heat treatment method and a preparation device thereof, which comprises a main part, a release part and a preparation device; the main part comprises a mixing assembly, a quantitative assembly arranged in the mixing assembly and a shielding assembly arranged outside the quantitative assembly; the release part comprises a partition assembly arranged in the mixing assembly, a control assembly arranged outside the shielding assembly and a guide assembly arranged outside the control assembly; firstly, the crushed material is sent into the mixing assembly, then the material is proportioned through the quantitative assembly, the quantitative assembly and the shielding assembly are controlled to rotate, the shielding assembly is separated from the discharge port of the quantitative assembly under the resistance of the guide assembly, the material enters the partition assembly, the proportioning of the ceramic particles and the metal powder is realized, when a certain amount of material is accumulated in the partition assembly, the partition assembly releases the material into the stirring cavity A2, and the mixing and proportioning of the ceramic particles and the metal powder are realized.
Owner:XIAN THERMAL POWER RES INST CO LTD +1

Abrasion powder collection method and abrasion powder collection device

An object of the present invention is to provide an abrasion powder collection method and an abrasion powder collection device capable of collecting abrasion powder while preventing aggregation of the abrasion powder.SOLUTION: A method for collecting abrasion powder of the present invention includes a collecting step of sucking and collecting abrasion powder obtained by pressing a rubber piece against an abrasion drum and rotationally abrading the rubber piece by a suction device, wherein in the collecting step, powder for preventing aggregation is supplied to a rotational abrasion surface between the abrasion drum and the rubber piece, and a supply flow amount of the powder for preventing aggregation is 0.5 to 6.0 (cm3 / min). A device for collecting abrasion powder of the present invention includes an abrasion drum configured to be capable of pressing a rubber piece, a suction machine for sucking abrasion powder, and a supply unit for supplying powder for preventing aggregation to a rotational friction surface between the abrasion drum and the rubber piece, in which the suction machine includes a suction nozzle, and the suction nozzle is disposed immediately below the rotational friction surface of the abrasion drum with the rubber piece.SELECTED DRAWING: Figure 1
Owner:BRIDGESTONE CORP

Lightweight combined grinding wheel

The utility model relates to the technical field of grinding wheels. In order to overcome the defects that an existing grinding wheel is difficult in chip removal and short in service life, the utility model provides a light-weight combined type grinding wheel which comprises a bottom plate, a cover plate and an adapter. Wherein the bottom plate and the cover plate are coaxially attached and are fixed through the adapter. A plurality of bosses are formed on the surface of the side, away from the cover plate, of the bottom plate. The bosses are evenly distributed around the axis of the bottom plate at intervals. Abrasive particles are laid on the top face of each boss. The bosses are spaced from each other, and a chip groove is formed between every two adjacent bosses. And the chip groove is used for discharging abrasive dust generated by grinding. According to the utility model, the boss and the chip groove are arranged on the cover plate, and the diamond abrasive particles are laid on the top surface of the boss in a brazing manner, so that the convenience of the grinding wheel during chip accommodating and chip removal is improved, and dust generated during grinding is reduced. And under the condition that the abrasive particles are abraded and fall off, the bottom plate can be independently replaced, so that the service life of the grinding wheel is longer.
Owner:BEIJING GANG YAN DIAMOND PROD CO +1

ferrograph (dual rotation)

Owner:KUNSHAN SOOHOW INSTR CO LTD

Processing method and processing system for hard and brittle material workpiece

The invention relates to a machining method and system for a hard and brittle material workpiece. In one aspect, the machining method comprises the steps that a viscous medium is applied to the to-be-machined surface of a workpiece; and the fixed abrasive tool makes contact with the to-be-machined surface and generates relative movement for grinding machining, in the grinding machining process, abrasive particles falling off from the fixed abrasive tool in the grinding machining process are captured by the viscous medium and suspended at the contact interface of the fixed abrasive tool and the workpiece, so that a free abrasive layer is formed, and the free abrasive layer is separated from the to-be-machined surface. And therefore, the abrasive particles in the free abrasive material layer perform in-situ grinding on the to-be-machined surface. Therefore, the cutter lines are reduced or even eliminated, and the surface machining quality of the workpiece is improved.
Owner:CHONGQING XINHUI MATERIALS TECHNOLOGY CO LTD

Surface topography dynamic modeling method for camshaft non-circular contour high-speed grinding

ActiveCN121234775AGeometric CADBelt grinding machinesHigh-speed grindingWear particle
The invention relates to the field of machining modeling, in particular to a camshaft non-circular contour high-speed grinding surface topography dynamic modeling method, which comprises the following steps of: acquiring a mixed signal to obtain a source signal component corresponding to grinding wheel wear; signal features with high correlation with grinding wheel wear are selected to be combined with the grinding wheel abrasive particle wear area to jointly construct an abrasive particle wear online prediction model based on FAW-DELM; measuring the surface appearance of the grinding wheel, setting the grinding particle exposure height to obey normal distribution, calculating the grinding wheel grinding particle exposure height through the real-time grinding wheel grinding particle wear area, dynamically adjusting the mean value of the normal distribution, and combining the measured grinding particle space distribution calculation result to establish a grinding wheel surface appearance dynamic simulation model; establishing a single abrasive particle grinding motion trajectory equation considering vibration; and the grinding surface topography is generated in combination with the grinding wheel surface topography dynamic simulation model and the single abrasive particle grinding motion trajectory equation considering vibration. Dynamic analysis can be carried out, and the accuracy is high.
Owner:HUAQIAO UNIVERSITY

Metal flux-cored welding wire for wind turbines, its preparation method and application method

This invention discloses a metal flux-cored welding wire for wind turbines, comprising flux powder and a welding sheath. The flux powder is composed of the following components: Ni: 58%-80%, Cr: 10%-16%, Mo: 4%-12%, Nb: 1%-3%, Fe: 2%-14%, C: 0.1%-0.2%, Mn: 0.2%-0.5%, Si: 0.2%-0.5%, with the sum of the mass percentages of the above components being 100%. The welding sheath is made of Inconel 718 alloy strip. This invention also discloses a method for preparing and applying the metal flux-cored welding wire for wind turbines. This invention solves the problem of pitting corrosion and abrasive wear on the surface of high-speed gears in existing wind turbines, particularly in environments with high corrosion resistance requirements, such as offshore and desert environments with high wear resistance requirements, resulting in corrosion pits and wear microcracks.
Owner:XIAN UNIV OF TECH

Method and device for wear resistance detection of gantry machine tool spindle system

The application discloses a wear resistance detection method and equipment for a gantry machine tool spindle system, and relates to the technical field of machine tool spindle state detection. The method comprises the following steps: when the spindle is running, first, torque and rotating speed signals are collected to calculate friction power input energy; the spindle and lubricating oil characteristic sets are synchronously collected to establish heat dissipation energy, and acoustic emission energy is calculated by using an acoustic emission array; oil detection is performed to establish abrasive particle generation potential, equivalent grinding energy is calculated to obtain a first wear detection result; an ultrasonic sensor is activated to obtain a second wear detection result; and after interactive authentication, a wear resistance detection result is output. The application solves the technical problem that the wear resistance detection means of the gantry machine tool spindle system is single, the wear state cannot be reflected in real time, only partial physical quantities can be captured, and the detection data is one-sided, the accuracy and reliability are insufficient, achieves multi-dimensional real-time comprehensive detection of the wear resistance of the gantry machine tool spindle system, and improves the technical effect of comprehensiveness, accuracy and reliability of the detection data.
Owner:NANTONG HONGHAN INTELLIGENT EQUIP CO LTD

Method of Forming Patterned Abrasive Substrate

Abrasive articles and associated methods are shown that include abrasive particles arranged in one or more symbols on a backing substrate. Examples include shaped abrasive particles arranged into one or more symbols. Other examples include one or more wear particles with a height less than other abrasive particles, such that when exposed, the wear particles indicate a wear condition of the abrasive article.
Owner:3M INNOVATIVE PROPERTIES CO

A high-sharpness strong self-sharpening core drill for ceramic matrix composite small hole machining

The application discloses a high-sharpness strong-self-sharpening bushing drill for ceramic matrix composite small-hole machining, which comprises a groove structure provided with a cutter base skeleton and composite particle size diamond abrasive particles brazed on the base skeleton, and the cutter base skeleton is mainly in a hollow cylindrical structure, a plurality of intersecting and uniformly distributed inner and outer grooves are designed on a working end, and the inner and outer grooves are all brazed with diamond abrasive particles, wherein the diamond abrasive particles in the inner and outer grooves can enhance the cutting capacity, and the particle size of the diamond abrasive particles in the inner and outer grooves is greater than that of the diamond abrasive particles on the outer circumferential surface of the working section (to ensure hole machining precision); when the diamond abrasive particles are abraded to cause the sharpness of the drill bit to decrease, the diamond abrasive particles in the groove structure start to fall off to participate in machining. The bushing drill structure design can keep the cutter in a high-sharpness state, improve the drilling quality and the service life of the bushing drill, and meet the requirements of high-efficiency, high-quality and low-cost machining of ceramic matrix composite small holes.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1

Clamp for deburring through abrasive flow

The utility model relates to the technical field of deburring devices, in particular to an abrasive flow deburring clamp which comprises a panel, a bottom plate and a plurality of middle sleeves, the middle sleeves are all arranged between the panel and the bottom plate, the middle sleeves are provided with containing spaces, the upper ends and the lower ends of the containing spaces penetrate through the upper ends and the lower ends of the middle sleeves respectively, the panel is provided with first through holes, and the bottom plate is provided with second through holes. A second through hole is formed in the bottom plate, a plurality of flow channels are formed in the edge of the containing space, and the tops of the flow channels penetrate through the top of the containing space. A plurality of products are placed in the middle sleeves at the same time and processed through the abrasive flow liquid polishing machine, batch deburring operation is achieved, due to the fact that each product is independently placed in the containing space of the middle sleeves, and the flow channels are formed between the middle sleeves, it is guaranteed that abrasive flow is evenly distributed, and the product quality is improved. And mutual contact and friction between products are avoided, so that surface scratching and bumping are effectively prevented, and burrs and burrs on complex parts such as cross holes can be more effectively removed.
Owner:DONGGUAN BOXIN PRECISE MASCH CO LTD

Cutter wear rule model construction method

The invention discloses a tool wear rule model construction method. The invention relates to the field of shield cutter wear rule research, and solves the problems that an existing method is complex in model construction, is easily interfered by working condition fluctuation in practical application, and is insufficient in prediction stability. The method comprises the following steps: acquiring wear loss data of a tool changing point of a practical engineering tool, and establishing a practical engineering wear rule model by using a K-means clustering and quadratic fitting method; based on a CSM model of approximate constant-section hob rock breaking force and a Rabinowicz abrasive wear equation, a theoretical model of a wear rule is established; establishing a blade yield strength change model for the blade yield strength in the theoretical model; and the blade width change model and the blade yield strength change model are added into the theoretical model to obtain a corrected tool wear rule model, and the model can provide accurate data support for tool replacement cycle planning in shield tunneling construction.
Owner:HUNAN NORMAL UNIVERSITY

Abrasive particles having complex shapes and methods of forming same

An abrasive grain is disclosed and may include a body. The body may define a length (l), a height (h), and a width (w). In a particular aspect, the length is greater than or equal to the height and the height is greater than or equal to the width. Further, in a particular aspect, the body may include a primary aspect ratio defined by the ratio of length:height of at least about 2:1. The body may also include an upright orientation probability of at least about 50%.
Owner:SAINT GOBAIN CERAMICS & PLASTICS INC

Corrosion-resistant and wear-resistant liquid slip ring for precise grinding and polishing

The invention relates to the technical field of grinding and polishing, in particular to a corrosion-resistant and wear-resistant liquid slip ring for precise grinding and polishing. The slip ring comprises a static part and a rotating part which are made of polyether-ether-ketone, and a wear-resistant sealing assembly comprising a zirconia ceramic wear-resistant spacer bush and a fluororubber sealing piece. All flow passage components are made of PEEK materials, so that pollution of metal ions to grinding fluid is completely eradicated; the high-hardness and high-smoothness ceramic wear-resistant spacer bush is used as a core rotating pair, so that the abrasive wear resistance is greatly improved; a multi-layer sealing protection system composed of a static seal, a fluororubber framework oil seal dynamic seal and an auxiliary isolation structure composed of small gaps is constructed, particles can be effectively retarded, impact can be effectively buffered, and it is ensured that long-term, stable and clean grinding fluid transmission is achieved under the working conditions of strong corrosion and high abrasion.
Owner:SHENZHEN XIKEO IND CO LTD

Resin grinding wheel for polishing hard alloy cutter and preparation method of resin grinding wheel

The invention relates to the technical field of super-hard grinding tool preparation, in particular to a resin grinding wheel for hard alloy cutter polishing and a preparation method of the resin grinding wheel. Forming a bonding layer on the outer circumferential surface of the base body layer; forming an abrasive material layer on the outer circumferential surface of the bonding layer; wherein the abrasive material layer comprises the following raw materials in parts by weight: 45-55 parts of diamond abrasive particles, 12-18 parts of modified epoxy natural rubber, 3-5 parts of a sulfur-zinc oxide vulcanizing agent, 3-4 parts of a vulcanization accelerator, 20-30 parts of modified polyurethane and 1-3 parts of a nano dispersant, and the resin grinding wheel has the characteristics of low roughness and low grinding wheel wear ratio.
Owner:NANJING SANCHAO ADVANCED MATERIALS