507 results about "Mechanical impact" patented technology

The invention provides an anti-interference sound and vibration detection method and device, and relates to the field of sound and vibration detection. The method comprises the following steps: acquiring target special equipment and an equipment type corresponding to the target special equipment; according to the equipment type, acquiring a multi-channel high-sensitivity sensing array combination corresponding to the equipment type from a preset inspection method database; acquiring sound vibration signal data corresponding to the target special equipment based on the multi-channel high-sensitivity sensing array combination; performing modal decomposition on the sound vibration signal data by applying an improved empirical mode decomposition algorithm, eliminating pseudo-modal components and reconstructing effective modal signal data; and inputting the reconstructed effective modal signal data into a sound-vibration collaborative recognition model, and outputting a structural state recognition result of the target special equipment through the sound-vibration collaborative recognition model. According to the method and the device, the problem of low sound vibration detection accuracy of a traditional sound vibration detection technology when mechanical impact, fluid disturbance, electromagnetic interference or multi-source background noise is accompanied in the environment where the detected equipment is located is solved.

The invention provides a copper-steel composite heat pipe and a preparation method thereof, and relates to the technical field of heat pipes, the copper-steel composite heat pipe comprises a steel-copper composite pipe, and the steel-copper composite pipe is composed of a copper inner pipe and a steel outer pipe. An internal copper structure is arranged in the steel-copper composite pipe; the internal copper structure is copper powder or a copper wire mesh. The copper powder is unilateral copper powder or bilateral copper powder or ring copper powder; the copper wire mesh is a copper mesh, or a copper mesh and a copper wire capillary, or a copper wire capillary. The steel outer pipe is made of steel 316L, and the copper inner pipe is made of copper C1020. The copper-steel combined material is used, the cost is saved, and it is guaranteed that materials are saved in the whole heat dissipation field. The double-layer combination of the copper inner pipe (C1020, high heat conduction) and the steel outer pipe (316L, corrosion resistance and high strength) is adopted, the efficient heat conduction of copper is utilized, and the environment erosion resistance and mechanical impact resistance of steel are utilized, so that the heat pipe is adaptive to complex working conditions (such as industrial high-temperature, humid or corrosion risk scenes), and the service life of the heat pipe is prolonged.

The invention provides a high-speed submerging jet flow and mechanical shock synergistic ice damage test method. The method comprises the following test steps: S1, arranging a data acquisition system; s2, initializing working conditions; s3, preparing an ice body sample; s4, prefabricating ice body damage by high-pressure water jet; s5, a servo electric cylinder drives a mechanical structure to impact ice damage; s6, data acquisition; and S7, data processing. According to the invention, the force sensor, the laser displacement sensor and the high-speed camera synchronously collect the load, deformation and image information of ice damage caused by impact of a mechanical structure by means of the servo electric cylinder under the jet-assisted effect, so that accurate control and synchronous measurement of submerged jet and mechanical cooperative damage are realized; the impact of different mechanical structures at different speeds on the ice damage load is avoided.

The invention provides an array jet flow and mechanical shock synergistic efficient controllable ice damage method which comprises the following steps: S1, moving to an ice damage target position, and defining an ice damage target range; s2, adjusting the position of a high-pressure jet array and a mechanical impact point according to the ice damage range; s3, the ice material is subjected to continuous impact melting corrosion through a high-pressure jet array, and jet defects distributed in an array mode are manufactured; s4, mechanical impact acts on the target area of the ice material, radial cracks radiating outwards are generated, the radial cracks are connected with the multiple jet flow defects and guide the multiple jet flow defects to generate annular crack communication, and bending failure of the ice material is accelerated; s5, the crushing degree of the ice material in the target range is checked, and if the ice material is not crushed completely, the step S4 is repeated; and S6, the mobile platform continuously works, and the step S1 to the step S5 are repeated. According to the method, the damage range and the ice damage degree of the ice material can be accurately controlled by means of the annular cracks generated by the jet damage cooperating with the mechanical impact effect, and accurate ice breaking is achieved.

The invention provides an in-vehicle acoustic enhancement method and device fusing determinacy-randomness hybrid modeling, and the method comprises the steps: collecting a fitted vehicle acceleration sound sample, extracting audio data, carrying out the analysis, constructing a determinacy component synthesis algorithm, and associating with a vehicle working condition; the method comprises the following steps: constructing a multi-physics-field coupled random noise generation module, wherein the multi-physics-field coupled random noise generation module comprises an aerodynamic noise module for simulating air inlet turbulence, a low-frequency pulse module for representing mechanical shock, a detonation module for simulating combustion uncertainty and a nonlinear distortion module for enhancing exhaust roughness and generating high-order harmonics; each random noise generation module is matched with the deterministic component, and mixing of the deterministic component and the random component is realized through weight adjustment; details are enhanced through dynamic compression, and target sound waves are generated; through collaborative optimization of determinacy-randomness components, the naturalness and brand identification degree of synthetic sound waves are improved, the vehicle working condition and driving information can be converted into perceptible sound effect characteristics, and the problem of information perception simplification in the electric vehicle driving process is solved.

The invention belongs to the technical field of impact fatigue tests of metal materials, and relates to an impact fatigue test system for simulating a working condition environment of a gun firing pin, which can perform high-frequency cyclic loading of 200MPa-500MPa, microsecond (mu s) level impact pulse and more than kilohertz (kHz), and synchronously simulate the working condition environment. High-energy, high-frequency and short-pulse impact loading under the gun and gun firing pin working condition is carried out through the high-frequency impact generation subsystem, and the dynamic mechanical environment in actual service is effectively simulated; the environment simulation subsystem is used for accurately controlling the temperature, the concentration and the pH value of media such as salt mist and seawater, and is synchronously coupled with mechanical shock, so that mechanical-electrochemical synergistic damage conditions are truly represented; dynamic stress, strain, electrochemical parameters and surface topography in the impact process are synchronously monitored through a multi-parameter synchronous acquisition subsystem, and complete data support is provided for researching the damage evolution law of a material under a complex load; the repeatability and the safety of the test are ensured through the modularized sample clamp subsystem and the dynamic sealing design.

The invention relates to a motion control method and equipment of crawler loader equipment and a storage medium, the crawler loader equipment comprises a crawler loader, a hydraulic driving module and a sensor, the hydraulic driving module is connected to the crawler loader, the sensor is arranged on the crawler loader, and the method comprises the steps that the motion state, detected by the sensor, of the crawler loader is obtained; when the motion state reaches a preset first threshold value, an instruction for supplying oil to the hydraulic driving module at a first speed is triggered; and when the motion state reaches a preset second threshold value, an instruction for stopping oil supply to the hydraulic driving module is triggered. When the motion state of the slagging-off machine meets the requirement, the oil supply speed can be reduced or oil supply can be stopped, then the vibration amplitude of the slagging-off machine in the working process is reduced, the situation that mechanical parts and a hydraulic system of the slagging-off machine are damaged due to violent mechanical impact generated by sudden stopping of the slagging-off machine is avoided, the replacement frequency of quick-wear parts in the slagging-off machine is reduced, and the service life of the slagging-off machine is prolonged. And the overall service life of the crawler loader equipment is prolonged.

The invention relates to the technical field of building repairing materials, and particularly discloses an anti-impact and wear-resistant repairing material and a preparation method thereof.By optimizing the content of all the components of the raw materials, the prepared repairing material has excellent anti-erosion performance and wear-resistant performance, Portland cement serves as a main cementing material, and the anti-impact and wear-resistant performance of the repairing material is improved; basic strength and cohesiveness are provided; fly ash and silicon powder synergistically enhance compactness and durability; quartz sand is used as wear-resistant aggregate, so that the compression resistance and the wear resistance are improved; the toughness and the impact resistance are enhanced by the composite modified carbon fibers; the redispersible latex powder improves the flexibility and the binding power; the polycarboxylate superplasticizer optimizes the flowability and improves the compactness; and the defoaming agent reduces pore defects and ensures material uniformity. The repair material provided by the invention is suitable for repair engineering needing to bear mechanical shock or wear environment, and has good construction performance.

The invention discloses a forging die for suspension clamp preparation, and relates to the technical field of suspension clamp forging dies, the forging die comprises an upper die, a lower die and a guide pillar guide limiting structure arranged between the upper die and the lower die; the upper die comprises an upper die base and a male die fixed below the upper die base. The lower mold comprises a lower mold base, a female mold and an ejection mechanism, the female mold is fixed on the lower mold base, a mold cavity of the female mold is matched with the male mold core, and the ejection mechanism is an automatic demolding mechanism with an energy storage impact function and comprises a lifting assembly, an ejection rod, a positioning assembly, a transmission assembly and an unlocking assembly. The problem that in the prior art, when a suspension clamp is forged, constant ejection force cannot overcome increased demolding resistance caused by product cooling shrinkage, static friction and vacuum adsorption jointly is solved. The energy storage impact type ejection mechanism has the advantages that instant mechanical impact can be automatically applied to damage vacuum adsorption and static friction force when a product is stuck in a mold, demolding is facilitated, and the like.

The invention belongs to the technical field of ship equipment, and discloses a wave suppression device and a ship. The wave suppression device comprises a hinge four-bar mechanism, a spoiler sheet and a rotary driving part, and the rotary driving part drives the spoiler sheet to rotate through the hinge four-bar mechanism, so that the spoiler sheet has a working position extending into water. The rotary driving part is arranged above the water surface, and the sealing surface of the rotary driving part is separated from the seawater environment, so that the possibility that marine organisms are attached to the sealing surface of the rotary driving part is fundamentally avoided, and the maintenance frequency and the environmental protection risk are remarkably reduced. Besides, the rotary driving part is far away from a seawater corrosion environment and does not need to bear underwater pressure, so that the failure probability of the sealing part caused by seawater corrosion or mechanical shock is reduced, the working stability of the driving system is improved, and the service life of the driving system is prolonged.

The invention provides a thermal-compression-shear coupling effect-based explosive charging reaction threshold value measuring device, which comprises a sleeve, the sleeve comprises a cylindrical sleeve body, and the sleeve body is internally and coaxially provided with an axially through sleeve center cylindrical cavity; a lower striking column, a grain bottom isolation plastic pad, a grain circumferential isolation plastic ring, a compression-shear conversion rubber pad and an upper striking column are sequentially and coaxially arranged in the cylindrical cavity in the center of the sleeve from bottom to top in the axial direction. An explosive column is further coaxially arranged in the explosive column circumferential isolation plastic ring, the axial length of the explosive column is equal to the axial length of the explosive column circumferential isolation plastic ring, and the diameter of the explosive column is equal to the inner diameter of the explosive column circumferential isolation plastic ring. The sleeve body is further provided with a sleeve thermocouple, and the sleeve body is further coaxially sleeved with an annular heating sleeve. According to the device, the reaction threshold value of the explosive charge under the heat-pressure-shear coupling effect can be obtained, and the amplitudes of the heat load and the mechanical impact load borne by the explosive charge can be quantitatively adjusted.

The invention relates to the technical field of power line unmanned aerial vehicle deicing, in particular to a power line unmanned aerial vehicle deicer which comprises a deicing seat assembly arranged below an unmanned aerial vehicle body, a clamping groove is formed in the middle of the deicing seat assembly, and clamping assemblies are symmetrically arranged on the two sides of the clamping groove. An advancing assembly is arranged at the front end in the deicing seat assembly in the deicing advancing direction and used for driving the deicing seat assembly to advance in the electric power circuit deicing direction, an ice breaking assembly is arranged at the position, located at the rear end of the advancing assembly, in the deicing seat assembly, and the ice breaking assembly is driven by advancing of the advancing assembly to break an ice layer on an electric power circuit. And a spraying assembly is arranged at the rear end of the ice breaking assembly in the deicing seat assembly, and is used for continuously spraying a deicing agent to the power line through which the advancing assembly and the ice breaking assembly pass. According to the method, a three-stage icebreaking synergistic mechanism is adopted, wherein the three-stage icebreaking synergistic mechanism comprises the steps of preposed cone thorn presplitting, high-frequency mechanical impact and fixed-point permeation spraying, so that a synergistic deicing path of crack propagation, brittle breaking and medicament permeation is formed.

The invention relates to a material dynamic mechanical property testing technology, in particular to an impact mechanical loading device and method based on a locked-rotor test of an electromagnetic coil emitter, and the device comprises a pulse power supply module, an electromagnetic loading module, a constraint fixing module and a measurement and control system. Capacitor charging voltage is set through an upper computer, a control switch is switched on to discharge an electromagnetic loading module to generate pulse current, and an electromagnetic coil generates a pulse magnetic field to enable a conductor armature to induce eddy current to generate axial electromagnetic force; the position of the armature is rigidly restrained to form locked rotor, impact electromagnetic force is directly loaded to a sample through an impact head to form impact stress, and dynamic response, fatigue damage and aging accumulation experiments of materials are carried out by monitoring the working performance of a monitoring device such as voltage, current and impact force. The device has the advantages of being small in size, flexible and adjustable in impact stress wavelength and amplitude, high in efficiency and the like, and the problems that a traditional mechanical impact device is large in size, the impact stress pulse width is not easy to regulate and control, and the test efficiency is low are solved.

The invention provides an impact table top optimization method and device based on multi-physics field coupling and a storage medium, and belongs to the technical field of mechanical impact simulation. According to the scheme, an impact table top is modeled, a large number of finite element models are randomly constructed according to a modeled structure model, and the impact table top is optimized; the model simulation system is used for carrying out analogue simulation on each finite element model, and the finite element model with the highest fitness is determined, so that the impact table top can be optimized according to table top parameters corresponding to the finite element models, and the performance requirements of light weight, high fundamental frequency and high strength / rigidity can be met at the same time; therefore, the impact table board can be in an extreme dynamic environment with high energy, transient impact and broadband excitation.

The invention relates to the technical field of transformers, in particular to a voltage regulating transformer which comprises a machine shell, a cover plate and a voltage transformation device, two transverse plates are arranged at the bottom of the voltage transformation device, grooves are formed in the bottoms of the two transverse plates, and clamping seats movably connected with the two grooves are movably arranged in the machine shell. According to the voltage regulating transformer, the L-shaped rods, the extrusion plates and the grooves of the transverse plates are dynamically matched, and the L-shaped rods and the extrusion plates are cooperatively operated with the shaking adjusting mechanisms, so that the voltage regulating transformer has the advantages that the voltage regulating effect of the voltage regulating transformer is improved, and the voltage regulating transformer is convenient to use and high in practicability. A multi-stage buffer system is constructed between the transformer core element and the shell, in the aspect of vibration isolation, when electromagnetic vibration is transmitted to the fixed inclined block through the clamping base and the movable inclined block, vertical vibration is converted into horizontal displacement through the inclined plane structure, and external mechanical impact can be effectively attenuated through spring damping.

The invention provides a new pollutant high-efficiency membrane treatment intelligent device based on solid waste geopolymer, and relates to the field of filtering equipment, the new pollutant high-efficiency membrane treatment intelligent device comprises a filtering box, a rigid support frame is arranged on the inner wall of the filtering box, a filtering membrane is supported on the rigid support frame, and a flexible elastic buffer gasket is arranged on the contact surface of the rigid support frame and the filtering membrane; the filtering membrane is a geopolymer membrane; a specific functional layer is compounded on the geopolymer film; an outlet of the emptying valve is communicated with the flow guide channel. And the membrane filter cartridge is detachably connected with the connecting part of the membrane filter cartridge in the impurity removal box by adopting a clamping bolt type quick-opening locking mechanism. The elastic buffer gasket effectively absorbs operation vibration and mechanical impact; the clamping bolt type quick-opening locking mechanism simplifies the installation and replacement process of the membrane cylinder; the emptying valve and the flow guide channel can thoroughly eliminate air resistance; a functional layer (such as chitosan, alginate and the like) compounded on the surface of the geopolymer membrane has excellent adsorption capacity, and particularly has efficient interception and separation capacity on PFASs pollutants.

The invention discloses a self-adaptive control method and related device for multi-execution-shaft machining equipment, and the method comprises the steps: obtaining a mechanical resistance index and an abnormal adsorption index according to a load signal and an electromagnetic feedback signal of a driving mechanism in a process that a second execution part executes the butt joint of a workpiece; carrying out difference calculation and standardization processing on the two values and a self-adaptive reference value; performing weighted fusion according to a preset weight coefficient to obtain a comprehensive state index; and monitoring the change rate or the amplitude of the comprehensive state index in a continuous time window, and when the change rate or the amplitude exceeds a dynamic threshold value, adjusting the movement speed of the second execution component and / or executing a deviation correction action. According to the technical scheme, under the condition of not depending on a specific structure, butt joint deviation caused by chip residues or magnetic adsorption can be recognized and restrained in real time, mechanical impact is avoided, and the operation stability and machining quality of equipment are improved.

The embodiment of the invention provides a container transportation state monitoring method based on multi-parameter perception, which is applied to the technical field of logistics monitoring and comprises the following steps: by taking a Hall switch trigger signal as a time reference and a logic starting point, acquiring acceleration, attitude angle, position and temperature and humidity signals in a time window before and after triggering; performing time sequence correlation analysis on the acceleration, the attitude angle and the position signal to generate initial event judgment; when the initial event is determined to be physical door opening or hoisting start, extracting an impact decay time constant and an attitude angle deviation retention amount, and constructing a two-dimensional feature space to perform mechanical impact classification; asynchronously calling a temperature and humidity signal according to a judgment result for root verification; and generating a joint event code and executing differentiated resource control. According to the invention, triggering events with different properties can be accurately distinguished, risk grading of mechanical impact and source tracing of environmental abnormity are realized, terminal endurance time is obviously prolonged, and monitoring reliability is ensured.

The utility model discloses a positioning pin for an air pressure type pin pulling method. The positioning pin comprises a pin shaft and a high-pressure air connector, the pin shaft is conical, an air inlet hole is formed in the center of the pin shaft in the axial direction, and the high-pressure air connector is fixedly installed at the upper end of the air inlet hole. Compared with an existing locating pin, the locating pin is only provided with the air inlet hole and the high-pressure air connector, the locating pin is simple in structure and low in cost, and when the locating pin is used, the locating pin can be extruded out of the pin hole only by inputting high-pressure air into the air inlet hole. As no mechanical impact force or vibration exists when the positioning pin is used, the positioning pin is suitable for installing and taking out the positioning pin when parts of a precise mechanical structure are assembled, and the parts are not prone to being damaged and damaged due to the impact force and the vibration. And moreover, the precise resetting of each mounted part can be ensured, the mounting and debugging time is shortened, and the mounting labor intensity is reduced.

The utility model relates to a kind of vacuum suction material device for calendering auxiliary agent production, including with the suction material device main body of communicating with negative pressure source and with the suction material device main body connection suction pipeline, suction pipeline at least includes the inner layer of forming suction passageway and the outer layer of being oppositely arranged with inner layer, the interlayer cleaning track of being sealed at both ends and extending along pipeline axial direction is formed between inner layer and outer layer;At least one cleaning member that can be guided in interlayer cleaning track is arranged, cleaning member is isolated with suction passageway and is correspondingly arranged with the facing area of inner layer;Outer layer is provided with driving member, driving member drives cleaning member reciprocating motion along interlayer cleaning track in non-contact mode;And inner layer is provided with disturbance transmission structure in facing area, for at least one of mechanical impact, vibration or field-induced vibration generated in interlayer cleaning track is coupled to inner wall of inner layer under the condition of keeping to suction passageway sealed isolation.

The invention relates to the technical field of refractory brick processing, and discloses a dust-free raw material mixing device and process for converter tapping hole refractory brick processing, the dust-free raw material mixing device for converter tapping hole refractory brick processing comprises a material mixing cylinder, a stirring mechanism is arranged in the material mixing cylinder, and the stirring mechanism comprises an inner rotating cylinder, an outer rotating cylinder and a mounting ring; a driving mechanism is arranged at the top of the mixing barrel and comprises a driving motor, a pressure sensor, a driving gear, a rotating disc and a connecting ring, and a rotating column is fixedly mounted on an output shaft of the driving motor. The device is reasonable in design, the stirring resistance is monitored in real time through the pressure sensor, mechanical impact force is effectively converted and instantaneous overload is avoided by combining a pre-pressing buffer structure for connecting the spring and the damper, the motor is protected against damage through the design, the rotating speed in the mixing barrel can be kept stable, and the service life of the mixing barrel is prolonged. The continuous and uniform mixing of the high-alumina bauxite and the corundum powder under the variable-load working condition is ensured, and the durability of equipment and the production continuity are remarkably improved.

The application relates to the technical field of servo motor driving, and particularly discloses an inertia identification method based on double-frequency sinusoidal speed instructions, two different frequency sinusoidal speed instructions are sent to a motor by a servo driver, according to Newton's second law, a motion equation of a rotating system, a speed signal or an acceleration signal is multiplied by both sides of the motion equation of the rotating system, and integral operation is carried out in a complete period; for the test of the frequency omega1, the collected torque T e1 (t) is integrated with the acceleration, and thus the rotational inertia J can be directly solved. In the method, the speed instruction is a sinusoidal wave, compared with the trapezoidal acceleration and deceleration method and the step response method, the instruction is smoother, mechanical impact is small, and in addition, technical difficulties existing in the single-frequency sinusoidal excitation method can be avoided.

The utility model discloses an anti-lock brake circuit capable of reducing mechanical shock of a servo motor, which comprises a direct-current power supply, a relay, a diode and a brake coil, the anode of the direct-current power supply is connected with the anode of the diode through the relay, the cathode of the diode is connected with one end of the brake coil, and the cathode of the direct-current power supply is connected with the other end of the brake coil; an oscillating circuit formed by connecting a resistor and a capacitor in series is connected with the brake coil in parallel, and the resistor is connected with the cathode of the diode. The utility model not only can solve the problems of'mechanical impact 'and'flexible braking' frequently occurring in emergency, but also can reduce the braking burden, prolong the service life of equipment and improve the precision of the equipment.

The invention discloses an electromagnetic capture connecting mechanism with a spring flexible support, and relates to the technical field of electromagnetic capture. The device comprises a base, an inner cavity of the base is fixedly connected with a fixing assembly, the inner cavity of the base is fixedly connected with a flexible supporting assembly through the fixing assembly, the top of the flexible supporting assembly is fixedly connected with an electromagnetic coil, and the flexible supporting assembly comprises a mounting boss fixedly connected to the top of the base. According to the supporting structure, rigid supporting is changed into elastic deformable supporting, the stress of the end face of the electromagnetic coil and the supporting piece is effectively reduced, meanwhile, the damping spring and the electromagnetic coil are integrally designed, the buffering function is added while the electromagnetic performance is kept unchanged, the fatigue life of the supporting piece is prolonged, and the service life is prolonged. The magnetic core and the butt joint face are kept coaxial through the elastic buffering effect, force-displacement coupling energy absorption is achieved at the same time, mechanical impact at the electromagnetic capture moment is avoided, relative vibration attenuation in the butt joint process is accelerated, and capture precision is improved.

The utility model belongs to the technical field of engineering construction, specifically is a kind of engineering construction project information management device, including monitoring probe, still include: angle adjusting assembly, set in monitoring probe top;Photovoltaic board, set in angle adjusting assembly rotating end on;Connecting assembly, set in monitoring probe bottom outside;Power-on component, set in the both ends outside of connecting assembly;Battery module, set in the outside of power-on component;Limiting rod, symmetrically fixed to the outside of battery module;Mounting assembly, set in the outside of battery module, and mounting assembly is connected with external wall through fixed end;The utility model provides a kind of engineering construction project information management device, by installing assembly and erecting equipment on the wall outside, equipment is erected on the wall outside, avoid being placed directly on ground, reduce the damage risk caused by ground damp, dust flying or mechanical impact.

A position error monitoring method and control system of a rotating mechanism, in the position error monitoring method of the rotating mechanism, angular position data of an encoder of a first motor and an encoder of a second motor are acquired as first position data during a process; then, during a non-process, the relative speed between the first motor and the second motor is adjusted while the rotating mechanism remains in a rotating state, so that the relative position of the first rotating part and the second rotating part is dynamically adjusted to a preset calibration phase, and second position data are acquired during operation at the calibration phase; the transition from the process phase to the calibration phase can be completed without stopping the rotating mechanism, time loss and mechanical impact caused by frequent start and stop are avoided, and the operation efficiency and productivity of the rotating mechanism are improved; in addition, whether there is a transmission error is determined by calculating the deviation value between the second position data and the first position data, which helps to find faults in time and improve the consistency and yield of the process.

The invention belongs to the technical field of mechanical manufacturing and material science, and particularly relates to an artificial intelligence chip inductor powder mold surface strengthening treatment method and system, which comprises the steps of mold matrix mechanical shock strengthening pretreatment, preparation of a gradient diffusion layer, a toughness bonding layer and a superhard wear-resistant layer in sequence without breaking vacuum, and post-treatment. The system is integrated vacuum treatment equipment and realizes continuous treatment without breaking vacuum. Surface mechanical shock strengthening is introduced in the pretreatment stage of a mold base body, and a strengthening layer with a fine grain structure, high-density dislocation and remarkable residual compressive stress is formed on the surface layer of the mold. According to the strengthening layer, the fatigue strength and the plastic deformation resistance of the mold base body are effectively improved, a tough bearing substrate is provided for growth of the subsequent surface strengthening layer, and therefore the problem that the binding force between a traditional strengthening layer and a brittle base body is insufficient is fundamentally solved, and the fatigue fracture resistance of the whole mold structure is remarkably improved.

The invention relates to the technical field of road maintenance equipment, in particular to a viaduct ice and snow active identification and removal method and equipment based on deep learning, and aims to realize high-precision and low-delay identification of ice at the bottom of a bridge by replacing a standard convolutional layer in a YOLOv8 backbone network with a GSConv module and constructing a lightweight target detection model; by means of the identified and output position coordinates and size information, the infrared heating plate is guided to be accurately aligned with the root of the ice hanging part, heating parameters are dynamically adjusted, and the ice hanging part naturally falls off after being heated; falling ice blocks enter an ice melting box with a heating layer at the bottom through a collecting tank and a conveying pipeline, are instantly melted into water and are discharged through a drainage pipe, and a closed-loop clearing process without ice storage is formed. Manual intervention is not needed, the bridge body is prevented from being damaged by mechanical impact, the overturning risk of equipment caused by ice storage is eliminated, and the safety, efficiency and automation level of deicing operation are remarkably improved.

The invention belongs to the field of metal pipe machining equipment, and provides a multi-station pipe end forming machine aiming at the problems that existing equipment is low in station conversion efficiency, insufficient in positioning precision, inconvenient in die replacement and the like, the multi-station pipe end forming machine comprises a workbench, a linear guide rail and multiple sets of sliding bases and positioning frames, and a hydraulic push rod is driven to move; a six-station star-shaped bracket is arranged on the transposition main shaft and is matched with an arc-shaped bracket to clamp a pipe fitting, a stamping positioning sleeve and a transposition sleeve guarantee positioning and precise station switching, and a permanent magnet provides magnetic support; the die fixing table is provided with a replaceable forming die, the die fixing table integrates feeding, four-time progressive forming and discharging, forming is pushed through hydraulic drive, automatic position changing is achieved, continuous machining is achieved, efficiency and the automation level are improved, mechanical impact is reduced, and machining quality is guaranteed.

The application discloses a kind of brake band brake failure protection method and device, can when brake band brake is in failure state, start open loop zero servo control mode, in open loop zero servo control mode, determine the motor starting frequency matched with the current falling speed of lifting load, control motor starts at motor starting frequency, to control lifting load starts to descend from falling speed by motor to lifting load by applying upward direction tension, after motor starts, the operating frequency of motor is adjusted from motor starting frequency to preset frequency of lowering, to control lifting load to be lowered to ground at smaller speed corresponding to frequency of lowering.The application can start open loop zero servo control mode when brake band brake fails without action anti-falling device, safely lower lifting load to ground in the case where mechanical impact suffered by lifting mechanism is effectively reduced and braking comfort is improved, improve the work safety of lifting mechanism.