213 results about "Machining vibrations" patented technology

The invention discloses a multifunctional cutting base and a cutting method for a large fan casting, and relates to the technical field of casting cutting machining.The base comprises a self-adaptive supporting platform, a combined type damping assembly, a vibration control unit and a chip and oil mist recycling unit; the self-adaptive supporting platform is attached to the bottom of a casting through a plurality of spherical hinge universal planes with angles and heights adjusted hydraulically to form a profiling supporting face so as to achieve multi-point self-adaptive clamping. The combined type damping assembly conducts damping adjustment along with machining vibration dynamic response through the damping unit in cooperation with the vibration control unit, and the machining posture of the casting is stabilized. The cuttings and oil mist recovery unit is used for synchronously collecting and separating dust, metal cuttings and cooling oil liquid generated in the turning process through a liquid-solid separation module, a dust hood with a negative pressure suction function and a chip removal channel; the clamping stability and the machining precision of the large casting are effectively improved, the machining site environment is improved, and the problem that an existing large casting machining platform affects the casting machining state is solved.

The invention relates to the technical field of vibration monitoring, in particular to a rotating machine vibration protection method and system based on particle swarm optimization, and the method comprises the steps: obtaining a corrected load torque based on a polynomial fitting temperature compensation algorithm in combination with a real-time environment temperature and a sensor output voltage, and synchronously calculating an actually measured vibration amplitude; configuring the number of variational mode decomposition layers according to the real-time rotating speed of the rotor to obtain a preprocessed vibration signal, adjusting the number of independent component analysis iterations according to the load torque, separating the preprocessed vibration signal to obtain independent vibration components, and generating a feature vector; calibrating adaptive resonance theory network parameters based on a particle swarm optimization algorithm, obtaining a normalized feature vector, calculating the similarity with a fault feature template, outputting a diagnosis result, calculating the deviation between an actually measured vibration amplitude and a normal vibration threshold, and performing compensation according to the diagnosis result and the deviation. According to the scheme, the fault diagnosis accuracy of the rotary mechanical vibration protection system is effectively improved through multi-working-condition self-adaptive diagnosis.

The invention relates to the technical field of mold machining, in particular to a numerical control drilling machine for mold assembly machining. Comprising a base and a supporting seat installed on the base. A drilling mechanism is arranged on the supporting seat; the double twist drills are driven by the driving part to achieve synchronous back-to-back drilling in a rigid frame formed by the fixed seat and the sliding seat, the efficiency bottleneck of single-spindle sequential operation is broken through in a parallel machining mode, and machining vibration is effectively restrained by forming a force closed loop through generated reverse cutting force; meanwhile, the chip removing part is used for removing chips through extrusion supporting and moving of the push rod in the U-shaped chip groove of the twist drill, directional spraying of the spraying pipe is matched, automatic removing, cooling and lubricating of the chips are achieved, and therefore the technical problems of low efficiency, vibration deflection and chip winding existing in circular mold drilling are solved cooperatively on the whole.

The invention discloses a linear friction welding machine vibration compensation control method based on iterative learning, and the method comprises the steps: collecting a vibration signal of an electro-hydraulic servo vibration system of a linear friction welding machine in a welding process, determining a vibration amplitude, frequency and vibration center deviation, and when the vibration amplitude or the center deviation exceeds a preset threshold value, starting the linear friction welding machine; the controller starts vibration compensation control; an electro-hydraulic servo vibration system model is established, the rigidity characteristic and the dynamic load change of the system are comprehensively considered, an iterative learning control law of a controller is designed, and control convergence conditions are analyzed to ensure the stability and the high efficiency of control; based on the output of the controller, the error trend of the vibration signal is predicted in real time in combination with historical iteration data, and a feed-forward control signal is generated through a feed-forward compensation mechanism to adjust the vibration signal error in advance. According to the method, the iterative learning is applied to the vibration compensation control of the linear friction welding machine, so that the precise compensation of the vibration signal is realized.

The invention belongs to the technical field of robot machining vibration suppression, and particularly relates to a two-way electromagnetic type variable-stiffness damper for suppressing robot machining vibration and a kinetic parameter optimization method of the two-way electromagnetic type variable-stiffness damper. The damper comprises an electromagnetic variable-rigidity elastic element and a connecting shaft, the electromagnetic variable-rigidity elastic element comprises a permanent magnet fixedly arranged on the connecting shaft in a sleeving mode and a solenoid coil arranged in the circumferential direction of the permanent magnet, and the solenoid coil is in sliding connection with the connecting shaft; when the solenoid coil is electrified, the generated magnetic field direction is the same as the magnetic field direction of the permanent magnet. The magnetic field intensity in the coil is changed by adjusting the input current in the coil, so that the rigidity of the damper is quickly adjusted in a large range; on the basis, a tool nose frequency response prediction model considering the influence of the additional damper is established, and according to a tool nose frequency response test result of the robot milling system under the multi-pose condition, fixed kinetic parameters of the damper are optimized.

The invention relates to the technical field of numerical control machining, and discloses an end mill tool bit parameter optimization method which comprises the following steps: step 1, collecting cutting force data, cutting temperature data and machining vibration data in a machining process in real time through a sensor group integrated on an end mill tool bit; the sensor group comprises a strain sensor, a temperature sensor and a vibration sensor; 2, the collected cutting force data, cutting temperature data and machining vibration data are subjected to wireless processing; according to the technical scheme, a closed-loop control system is constructed, the feeding speed, the cutting angle and the cutting depth are automatically adjusted according to dynamically-changed cutting force and vibration data, it is ensured that the machining process is always kept within a stable interval, the machining precision and the surface quality of a workpiece are effectively improved, and the machining efficiency is improved. Compared with the technical scheme that fixed preset parameters are adopted for machining in the prior art, the defect that the precision and quality of the workpiece are finally damaged due to process instability caused by the fact that adaptive adjustment cannot be achieved is overcome.

The invention discloses a method and system for processing grinding vibration management data of a grinding machine, and relates to the technical field of data processing.The method comprises the steps that real-time grinding machine vibration data and real-time grinding feed amount are obtained, and sampled grinding machine vibration data and sampled grinding feed amount are obtained; real-time vibration displacement data in the X-axis direction, the Y-axis direction and the Z-axis direction, real-time three-axis feeding amounts in the X-axis direction, the Y-axis direction and the Z-axis direction, sampling vibration displacement data in the X-axis direction, the Y-axis direction and the Z-axis direction, sampling feeding amounts in the X-axis direction, the Y-axis direction and the Z-axis direction, an X-axis vibration variable quantity, a Y-axis vibration variable quantity and a Z-axis vibration variable quantity, and an X-axis feeding variable quantity, a Y-axis feeding variable quantity and a Z-axis feeding variable quantity are obtained; acquiring an X-axis abnormal index, a Y-axis abnormal index and a Z-axis abnormal index, marking an abnormal axial direction, and marking a normal axial direction; and real-time vibration displacement data and real-time feed amount are obtained, and corrected vibration displacement data are obtained. The method has the advantages of three-axis solution processing, sampling self-adaption and abnormity correction.

The invention relates to an anti-vibration cutter bar system for oversized-diameter deep hole trepanning, belongs to the technical field of deep hole machining, and solves the problems of large machining vibration, difficulty in guaranteeing hole shape precision, abnormal wear of a cutter and the like caused by insufficient rigidity and poor guide stability of a cutter bar system during oversized-diameter deep hole trepanning machining in the prior art. The system comprises a boring rod and a modularized trepanning cutter crown, wherein the modularized trepanning cutter crown is combined with the front end of the boring rod through a transmission convex key and a screw; at least one alloy guide key and at least one piece of damping wood are arranged on the outer circle face of the modular trepanning cutter crown, and the alloy guide keys and the damping wood jointly form a composite anti-vibration guide structure. Vibration in the machining process is effectively restrained through the composite anti-vibration guide structure, the dynamic stability of a tool bar system is improved, the tool bar system is particularly suitable for trepanning machining of super-large-diameter deep holes with the diameter larger than 400 mm, the machining requirements of different inner hole diameters can be met by replacing tool crowns of different sizes, and the machining precision and efficiency are improved.

The invention relates to the technical field of aluminum profile machining detection, and discloses an aluminum profile machining quality detection system and method based on multi-dimensional data analysis, and the method comprises the steps: S1, collecting cutting end face image data through an industrial camera, collecting cutting contour size data through a laser sensor, and collecting machining vibration signal data through a vibration sensor; through cooperative acquisition of the industrial camera, the laser sensor and the vibration sensor, the limitation of a single sensing dimension on surface quality, size precision and dynamic stability monitoring is overcome, the processing quality of a single aluminum profile is effectively and comprehensively judged and analyzed, and the processing quality of the single aluminum profile is effectively and comprehensively judged and analyzed by utilizing score feature extraction and multi-window trend analysis in a sliding window. The stability of the aluminum profile machining process is further judged and early warned, the comprehensiveness and accuracy of aluminum profile quality evaluation are improved, and process abnormity can be recognized before the quality problem is dominated.

An electromagnetic actuator assembly, integrated within a boring tool, for controlling unwanted machining vibration, comprising an outer tubular oscillating mass made of ferromagnetic material, through which the magnetic flux can pass; an inner stator that comprises an electromagnet assembly, located at the center of the tubular oscillating mass, for applying a controllable magnetic field to the oscillating mass; one or more damping elements, each having one or more springs and / or a damping material with predetermined stiffness and damping properties (such as a polymer or oil); a controller for providing a desired current to the electromagnets of the electromagnet assembly to obtain the controllable magnetic field; a holder for allowing the rotation of the electromagnet assembly to a desired angle, for stimulating the oscillating mass to apply a damping force, based on a combination of the magnetic field and stiffness and damping properties, which is aligned with the direction of the unwanted vibration.

The application provides an oil fume machine vibration testing device and a design method thereof, and relates to the technical field of oil fume machine vibration testing equipment. The design method mainly comprises the following steps: constructing a finite element model of the target oil fume machine vibration testing device; determining whether all the natural frequencies of the finite element model are located outside a preset motor excitation frequency range; if not, modifying the current finite element model to pass the modal checking stage; for the finite element model that passes the modal checking stage, applying a preset virtual load at the motor installation position to perform vibration simulation, and determining whether the maximum displacement is greater than or equal to a predetermined threshold; if not, modifying the current finite element model to pass the stiffness checking stage, and repeating the modal checking stage; iteratively performing the modal checking stage and the stiffness checking stage. Through the embodiments provided in the application, the oil fume machine vibration testing device designed can simulate the vibration of the oil fume machine during operation, and reduce the influence of resonance and forced vibration.

The application discloses a non-Newtonian fluid elastic auxiliary support clamp and belongs to the technical field of machining clamps. The clamp comprises a bottom plate provided with arrayed stepped mounting holes, an elastic auxiliary support assembly, a fixed support assembly and a pressing assembly. The upper section of the mounting hole is a smooth hole, and the lower section is a threaded hole; the elastic auxiliary support assembly comprises a non-Newtonian fluid medium filled in the hole, a compression spring arranged at the bottom and an elastic support nail in the shape of a stepped shaft. The fixed support and the pressing assembly are fixed in the mounting hole through threads. The application utilizes the shear thickening characteristic of the non-Newtonian fluid, and under the action of a milling impact force, the medium is instantaneously solidified to generate rigid support, thereby effectively inhibiting machining vibration and tool relief deformation of the overhanging part of a thin-walled plate part. The application has the advantages of simple structure, low cost, good universality and adaptability to multi-variety and small-batch production.

The invention relates to the technical field of gear machining, in particular to an intelligent chambering device and method for gear forging, which comprises a machine base and a pressure head capable of chambering a gear workpiece, and further comprises a movable bracket arranged above the machine base and used for supporting the gear workpiece, an inclined frame matched with a gear workpiece tooth groove is arranged at the top of the movable bracket, one end of the inclined frame is fixedly connected with a plurality of extending cylinders capable of extending into the gear workpiece tooth groove, an oil tank storing silicone oil is arranged in the inclined frame, and the oil tank communicates with the extending cylinders through conveying cylinders. The outer surface of the extending cylinder is provided with a flexible piece which can stretch to abut against a tooth groove of the gear workpiece, a driving assembly for driving the flexible piece to stretch is arranged in the conveying cylinder, and one side of the inclined frame is provided with a stretching assembly for pushing silicone oil to circulate and providing power for the driving assembly. The flexible piece can stretch in a self-adaptive mode and abut against the inner wall of a gear tooth groove to absorb machining vibration.

The invention discloses a dry bulk cargo port rotating machine fault diagnosis method based on a Transform-KAN network, and the method comprises the steps: obtaining an original vibration time sequence signal of a dry bulk cargo port rotating machine with a marked fault type, carrying out the preprocessing of the original vibration time sequence signal, and obtaining a preprocessing time sequence signal; the method comprises the following steps: constructing a Transform-KAN fault diagnosis model, wherein the Transform-KAN fault diagnosis model comprises an input module, a Transform encoder module, a feature aggregation module and a KAN network module; taking the preprocessed time sequence signal as feature data, taking the fault type as label data to obtain a sample data set, and performing model training on the constructed Transform-KAN fault diagnosis model according to the sample data set to obtain an optimal fault diagnosis model; and inputting a to-be-diagnosed rotating machine vibration time sequence signal to the optimal fault diagnosis model so as to realize fault diagnosis of the dry bulk cargo port rotating machine. The technical problems that an existing rotating machine fault diagnosis method is low in diagnosis accuracy, poor in anti-interference capacity, difficult to adapt to harbor severe environments and the like are solved.

The application relates to the technical field of aerospace part machining, and discloses a machining method for a thin-wall weak-rigidity long-span annular hollow structure part, which comprises the following steps: S1, preparation of a part blank; S2, clamping of the part blank by using a front face pad-up tooling, and the like. For the clamping of the thin-wall weak-rigidity structure, a self-adaptive compression tooling is designed to realize self-adaptive compression of the part, so that the clamping force direction of the self-adaptive compression device is perpendicular to the larger surface among all the contact surfaces between the main positioning element and the part, the part has sufficient clamping rigidity, machining vibration is prevented, the machining efficiency is improved, and the part surface quality is ensured; the part is divided into zones for stable cutting machining by taking the part reinforcing ribs as the division interfaces; the principle followed in the stable machining is'machining from the weak-rigidity part to the stronger-rigidity part', the unprocessed part of the zero is fully utilized to support the part being milled, the part is always in the best rigidity state, and the machining spring of the part is effectively prevented.

The application relates to the technical field of gear machining, in particular to an intelligent hole expanding device and method for gear forging, which comprises a machine base and a pressure head capable of expanding the hole of a gear workpiece, the surface of the pressure head is fixedly connected with sawteeth, further comprises a moving bracket arranged above the machine base and used for supporting the gear workpiece, the top of the moving bracket is provided with an inclined bracket matched with the gear workpiece tooth groove, one end of the inclined bracket is fixedly connected with a plurality of extension cylinders capable of extending into the gear workpiece tooth groove, the inside of the inclined bracket is provided with an oil tank storing silicon oil, the oil tank is communicated with the extension cylinders through a delivery cylinder, the outer surface of the extension cylinder is provided with flexible sheets capable of extending and abutting against the gear workpiece tooth groove, the inside of the delivery cylinder is provided with a driving assembly capable of driving the flexible sheets to extend, and one side of the inclined bracket is provided with an extending assembly capable of driving the silicon oil to flow and providing power for the driving assembly. The flexible sheets can self-adaptively extend and abut against the inner wall of the gear tooth groove to absorb machining vibration.

The utility model relates to a novel brick making machine vibration device, the bottom of a vibration mechanism is fixedly connected with a noise reduction protection supporting mechanism, a connecting mechanism is arranged between a vibration operation table and the noise reduction protection supporting mechanism, the noise reduction protection supporting mechanism comprises four fixing columns, four noise reduction baffles are connected among the outer surface walls of the four fixing columns in a sliding mode, and the noise reduction baffles are connected with the vibration operation table. The number of the connecting mechanisms is four, the four connecting mechanisms are connected to the four fixing columns correspondingly, the upper fixing plate is fixedly connected to the bottom wall of the vibration operation table, the upper limiting barrel is fixedly connected to the bottom wall of the upper fixing plate, the lower fixing plate is fixedly connected to the top faces of the fixing columns, and the lower limiting barrel is fixedly connected to the top wall of the lower fixing plate. Two ends of the connecting spring are respectively clamped in the upper limiting barrel and the lower limiting barrel; effective damping capacity is provided through the arranged connecting mechanism according to the elasticity of the connecting mechanism, the outer surface walls of the fixing columns are shielded and sealed through the noise reduction baffles, and the noise transmission effect is effectively reduced.

The utility model discloses a leakproof device for feeding modified plastic granules, which comprises a modified plastic granule processing machine, a feed pipe is mounted at the top of the modified plastic granule processing machine, a first mounting hose is sleeved on the outer ring of the feed pipe, a connecting pipe is fixedly mounted at the top end of the first mounting hose, and a receiving hopper is welded on the outer ring of the connecting pipe. A second mounting hose is fixedly mounted at the top end of the connecting pipe, and hose clamps are arranged on outer rings of one sides of the first mounting hose and the second mounting hose. By arranging the hose, the hose clamp, the ratchet wheel, the pawl and the like, the hose clamp is prevented from loosening due to machine vibration when a related machine is started; by arranging the first mounting hose, the second mounting hose, the hose clamp and the like, flexible connection at the connecting position is achieved, the situation that according to traditional rigid connection, when a related machine is started, vibration occurs, and consequently the connecting position is staggered is avoided, and the connecting stability is improved.

The utility model relates to the technical field of continuous casting machine vibration, and discloses a vibration device for a metallurgy continuous casting machine, which comprises a mounting base and a vibration rack, one side of the vibration rack is fixedly connected with a mounting rack, the lower end of the mounting rack is fixedly connected with a second sliding cylinder, and the periphery of the upper end of the mounting base is provided with sliding grooves. Four sliding grooves are formed in the lower end of the vibration rack, sliding blocks are slidably clamped to the inner surfaces of the four sliding grooves, buffering bent rods are rotationally connected to the upper ends of the four sliding blocks, the upper ends of the four buffering bent rods are rotationally connected with the four corners of the lower end of the vibration rack correspondingly, and first buffering springs are fixedly connected to one sides of the four sliding blocks; the two sides of the upper end of the installation base are both provided with sliding rods, and the two ends of the two sliding rods are both fixedly connected with first fixing blocks. When the device vibrates a crystallizer, force borne by the vibration rods of the device is minimized, metal fatigue of the device is relieved to the maximum extent, and the service life of the device is prolonged.

The invention provides a sectional type arc edge cutter for anti-fatigue machining, and relates to the technical field of cutter machining. Comprising a cutter body, the front end of a cutting edge of the cutter body is provided with a sectional type arc cutting edge so that the flow direction of cuttings of the corresponding arc sections can be changed through arcs between different sections, the cuttings generated during machining can be folded and curled at the different arc sections, the strength of the cuttings is reduced, and the cuttings can be broken off more easily; and a sectional sleeking edge is arranged at the rear end of the sectional arc cutting edge to extrude and rub a machined surface, so that friction vibration of the cutter and a workpiece is reduced, the quality of the machined surface is improved, high residual compressive stress is introduced, and the fatigue resistance of the workpiece is improved. According to the scheme, the cutting strength is reduced at the cutting generation source, the cutting is easier to break, meanwhile, machining vibration caused by a traditional sleeking edge is reduced, and the quality of the machined surface is improved.

The grinding machine for machining the vibration motor bearing comprises a machine body, a grinding frame is fixed to the top of the machine body, a lifting plate is installed on the grinding frame through a hydraulic rod, an electric grinding disc and a pressing and fixing assembly are installed at the bottom end of the lifting plate, and a dust collection assembly is installed on the inner side of the grinding frame. And a clamping assembly is mounted on the bed body. Through the design of the clamping assembly, a bearing is placed at the proper position of the top of the bed body, then a motor is started to drive a large bevel gear to rotate, the large bevel gear drives four small bevel gears to rotate, four lead screws rotate together, accordingly, a moving block moves together, four cambered surface clamping plates are driven by a bent lever to move together, and the bearing is clamped. And finally, the four faces of the bearing are clamped, so that clamping is very firm, operation is completed in one step, the clamping work speed and efficiency are effectively improved, and then a hydraulic rod is started to enable an electric grinding disc on a lifting plate to move to the inner circle of the bearing for grinding.

The invention discloses a battery pack heat shield baffle and a punching die thereof, the baffle comprises an L-shaped plate provided with a through hole, and the bending part of the baffle adopts a fillet design, so that the stress concentration is reduced. The punching die is composed of an upper die base, a bottom plate, a guide rod and the like, the upper die base is provided with a pre-pressing plate and a push block, the lower die base is correspondingly provided with a clamping base, the pre-pressing plate is connected with the upper die base through a spring, when the lower die base is hydraulically driven to press downwards, the pre-pressing plate firstly makes contact with a plate for auxiliary limiting, the push block pushes a sliding block to drive a pressing rod to abut against the plate, and precise positioning of punching is guaranteed. Meanwhile, the die forms a progressive buffering system through the vertical plate, the transmission head, the rubber pad and other components, when the upper die base is pressed downwards, the transmission head extrudes the rubber pad, a series of transmission structures are driven, vibration waves are reduced, machining vibration is avoided, punching force is output stably, and generation of micro cracks on the surface of a workpiece is restrained. The machining precision and quality of the battery pack heat shield baffle are remarkably improved, the service life of the mold is prolonged, and the product reliability is guaranteed.

The utility model provides a T-shaped groove milling cutter which comprises a cutter handle and a cutter head arranged on the cutter handle and coaxial with the cutter handle, the cutter head is provided with three cutting edges which are arranged at intervals along the circumferential direction of the cutter head and are consistent in rotating direction, and a first end edge and a second end edge are respectively arranged on two sides of each cutting edge in the axial direction of the cutter head. A chip groove is formed between every two adjacent cutting edges, the included angle formed between each cutting edge and the axis of the tool bit is a spiral angle, and the adjacent spiral angles are arranged in an unequal mode. According to the T-shaped groove milling cutter disclosed by the utility model, the adjacent helical angles are arranged unequally, so that the cutting force can be dispersed in time and space, the cutting force is prevented from being concentrated at a certain moment or a certain area, the service life of the cutter can be prolonged, and meanwhile, the machining vibration can be reduced, thereby being beneficial to improving the stability of cutting operation; and the machining quality of the T-shaped groove is ensured.

The invention relates to the technical field of motor shell machining, and discloses a cutting device for vibration motor shell machining, which comprises a cutting table, and further comprises an equipment box fixedly connected to the lower part of the cutting table and used for supporting the cutting table; the clamping mechanism is arranged in the equipment box and is used for clamping a machine shell; and the bottom of the cutting machine rotates around the machine shell on the cutting table through a rotating mechanism for cutting. By means of the rotating mechanism, constant initial feeding force is provided through the first tension spring, meanwhile, self-adaption of the cutting process is achieved through a one-way pawl mechanism composed of a deflector rod and a limiting hole with a rectangular bayonet, when the wall thickness is not uniform or casting defects occur, cutting counter-force can push the cutting machine to slightly retreat in the radial direction for buffering, and the cutting effect is good. And when the cutting condition is normal, the mechanism can lock and allow continuous feeding, knife pricking, tipping and even workpiece damage caused by sudden change of cutting force can be greatly avoided, and the mechanism is particularly suitable for machining characteristics of a vibration motor casting shell.

The invention relates to the field of machining, in particular to an angle head and main shaft connecting device with high connecting strength, comprising a power transmission module for transmitting main shaft power to an angle head; the pneumatic control module comprises a stator and a rotor which can rotate relatively, and a closed gas path is formed between the stator and the rotor through a sealing assembly, so that gas pressure is output in a rotating state; and the clamping module comprises a piston assembly controlled by air pressure, a transmission part and a clamping part, and axial movement of the piston assembly is converted into radial locking force of the clamping part through the transmission part. The gear bearing is axially positioned through the bearing baffle ring, so that an axial supporting reference is formed; the stator is fixedly connected with the protective cover, and the rotor is fixedly connected with the piston base and the output disc, so that a stable connecting frame is formed. The connection strength is greatly improved, the angle head self-weight inclination and the machining vibration are effectively eliminated, and the control precision of radial run-out is improved.

The invention discloses an internal expansion type numerical control lathe fixture for a thin-walled cylinder workpiece. The internal expansion type numerical control lathe fixture comprises a chuck body, a fixture body, a positioning cover, an expansion sleeve, a locking block and a locking wrench, the other end of the chuck body is connected with the clamp body; the positioning cover is connected with the clamp body, and the outer surface of the positioning cover makes contact with the outer surface of a workpiece to achieve workpiece positioning. The expansion sleeve is in conical fit with the clamp body, and the expansion sleeve expands to enable the outer surface of the expansion sleeve to make contact with a workpiece so as to abut against and clamp the workpiece; the locking block is connected with the expansion sleeve, the locking block is in threaded connection with the clamp body, and the expansion sleeve is controlled to be expanded and shrunk through rotation of the locking block; and the locking wrench is connected with the locking block. The expansion sleeve is matched with the conical surface of the clamp body, expansion of the expansion sleeve is controlled through threaded connection of the locking block, the thin-wall cylindrical workpiece is clamped by the expansion sleeve, the deformation of the part is reduced, the form and location tolerance of the part is guaranteed, the problem of machining vibration of the thin-wall workpiece is solved, and the machining efficiency and the machining quality of the part are greatly improved.

The application discloses a kind of milling surface topography distribution characteristics analysis methods of aviation structural parts, analysis vibration displacement signal distribution characteristics;Milling surface topography is obtained and the construction of milling surface topography feature distribution curve;Analysis vibration displacement signal distribution characteristics and the relevance of surface topography feature distribution characteristics, with milling surface topography curve time frequency as reference sequence.Overefficient milling experiment, obtain milling surface topography, extract milling transition surface residual feature curve, analyze the time-frequency characteristics of milling transition surface feature distribution curve.Using the relevance analysis between milling vibration displacement signal and surface topography feature, using grey correlation analysis method, assess the close degree of the influence of milling vibration on processing surface topography, and the correlation characteristics of vibration and processing surface topography characteristics are clear.

The application discloses a large-size high-precision torque sensor elastomer, which comprises C, Si, Mn, P, S, Cr, Ni, Mo and Fe. The preparation method comprises a vacuum arc furnace smelting process, a forging and post-forging normalizing and high-temperature tempering process, a rough machining process, a quenching and tempering heat treatment process, a cold treatment process and a finishing process, wherein the finishing process is performed according to the size requirement of the sensor elastomer parts, and a vibration aging stress relief process. The application removes residual stress and strengthens and stabilizes the sensor material structure through three aging processes of heat treatment aging, cold treatment aging and external field vibration aging. The elastomer prepared by the method combines good structure stability, a small thermal expansion coefficient and excellent comprehensive performance, can meet the use requirements of large-size high-precision torque sensor elastomers of different specifications, can work in different atmospheric environments, and can be used for mass production of elastomer materials.

The invention discloses a machine vibration energy collecting device based on a magnet-friction nanometer generator. The machine vibration energy collecting device comprises a bottom plate, a friction nanometer power generation unit, a load bearing plate, a permanent magnet and an elastic supporting plate. The first electrode is arranged on the bottom plate; the friction layer is of a flexible structure; the friction layer is provided with two oppositely-arranged load bearing plates, and one ends of the two load bearing plates are fixed to the bottom plate through elastic supporting plates correspondingly. The two load bearing plates are respectively provided with a permanent magnet, and the same-name magnetic poles of the two permanent magnets are oppositely arranged; the friction layer forms a structure with the two ends elastically supported and the middle arched upwards under the action of the elastic supporting force of the elastic supporting plate, the gravity of the load bearing plate and the gravity and repulsive force of the permanent magnets. The machine vibration energy collecting device based on the magnet-friction nanometer generator has the advantages of being simple in structure and high in power generation efficiency, and it is ensured that vibration energy is effectively and continuously captured.

The invention relates to the technical field of automatic control, in particular to an anti-falling device guide rail machining control system. The method comprises the steps that a multi-source data sensing unit collects guide rail morphology data, machining vibration data and environment data based on a multi-sensor network module, and machining state joint characterization is achieved through a Kalman filtering algorithm; the defect real-time early warning unit is used for identifying processing abnormity and size out-of-tolerance in a layered manner based on a cascade detection module, and quantifying defect risks in combination with a dynamic tolerance model so as to realize real-time early warning; the process optimization unit integrates macroscopic parameters and microscopic states based on a feature fusion module, and generates optimal cutting parameters through a self-adaptive optimization framework; the dynamic compensation control unit corrects the machining track in real time based on a path compensation module, and the critical dimension precision is ensured through a multi-objective optimization algorithm; and the quality tracing unit records process data based on the full-cycle data link module, evaluates equipment performance degradation and part life through a survival analysis model, and drives maintenance and calibration.