2039 results about "Mechanical components" patented technology

The invention relates to the field of abrasion morphology determination and abrasion loss calculation, and discloses an abrasion morphology and contact stress analysis and prediction method and system based on a rough contact surface, a medium and equipment, and the method comprises the steps: constructing a dynamic contact model, and obtaining an accurate movement rule and a stress analysis result of a moving mechanical component; constructing a three-dimensional rough surface digital twinborn model conforming to an actual contact surface; establishing a contact stress field multi-physical field analysis model to obtain elastic deformation and a friction heat effect; based on the contact stress distribution and the local wear rate which are obtained in real time, carrying out dynamic reconstruction on the wear morphology, and establishing a nonlinear iteration relation between the wear loss and the contact stress distribution; determining an accurate boundary condition based on an accurate movement rule and a stress analysis result of the moving mechanical component, and constructing a failure criterion based on contact stress gradient mutation and surface roughness evolution; key parameters are calibrated through experiments, and a mapping relation database of wear rate-stress state-morphological characteristics is established so as to carry out friction wear analysis.

The invention relates to the technical field of electric drive transmission system service life prediction, and discloses an AI-based electric drive transmission system comprehensive service life prediction method, which comprises the following steps: acquiring electric drive system operation parameters and mechanical part degradation data; arranging the data into a system operation full-period input tensor and a component degradation full-period input tensor, and respectively extracting multi-order feature tensors through a bidirectional recurrent neural network and a gated time convolutional network; performing cross-modal fusion by using a cross attention fusion network in combination with physical constraints to obtain a system-component degradation fusion feature vector; and after dimension reduction, inputting a multi-layer perceptron network output life prediction value, and generating a residual service life interval with confidence in combination with historical cases. The method integrates multi-source data, realizes cross-domain feature dynamic association and physical constraint fusion, improves the precision and reliability of life prediction, is suitable for intelligent operation and maintenance of the electric drive system, and provides a scientific basis for equipment maintenance.

The invention relates to a data and physical dual-drive mechanical part low-cycle fatigue life prediction method, which comprises the following steps: S1, carrying out finite element analysis on a mechanical part, and determining the maximum stress and strain value of a dangerous part; s2, acquiring test data of low-cycle fatigue failure, designing and carrying out a low-cycle fatigue test of the mechanical part material test piece by taking stress and strain as input, and acquiring test stress, strain and low-cycle fatigue cycle test data; s3, physical knowledge of low-cycle fatigue failure is obtained, material low-cycle fatigue physical knowledge analysis is carried out in combination with stock data, and physical knowledge of fatigue life and stress is obtained; s4, establishing a physical information neural network model, and inputting test data and physical knowledge; and S5, carrying out low-cycle fatigue life prediction on multiple dangerous parts of the mechanical part. The minimum service life of the dangerous part is used as the service life of the mechanical part. The method can significantly improve the life prediction precision.

The invention relates to a negative-wear super-wear-resistant current-carrying friction pair material which is a conductive lubricating film which is constructed in situ and stably exists under a current-carrying friction condition, and the current-carrying friction pair material is composed of Ga-based liquid metal, a Mo coating and an Al alloy bolt. Through cooperation of friction pair materials, a friction interface reaction is adjusted to generate a conductive lubricating film, and excellent lubricating and wear-resisting properties are achieved; in a large voltage and current range, the average friction coefficient is always maintained to be 0.25 or below, the existence of the lubricating film enables the surface to present negative wear, and the average negative wear rate is 1.28 * 10 <-6 > mm < 3 > / Nm or above. The obtained material is suitable for application in the field of electric contact industry and provides lubrication and wear protection for the surfaces of mechanical parts.

The invention relates to the technical field of intelligent control, in particular to a dynamic shelf level intelligent scheduling system. The system comprises a goods shelf distribution module, a mechanical element friction optimization module, a goods gravity center shift evaluation module and a goods handling simulation module. Obtaining storage structure data, and carrying out dynamic shelf storage space detection to obtain dynamic shelf storage space data; obtaining cargo information; performing cargo shelf distribution simulation according to the cargo information and the dynamic shelf storage space data to obtain cargo shelf distribution data; performing electric push rod stroke anomaly detection according to the goods shelf distribution data to obtain electric push rod stroke anomaly data; based on the abnormal stroke data of the electric push rod, driving motor locked-rotor detection is carried out to obtain driving motor locked-rotor data; and performing mechanical element friction optimization according to the locked-rotor data of the driving motor to obtain element friction optimization data. The warehousing operation efficiency and the system operation stability are improved based on the intelligent control technology.

The invention discloses a mechanical part pre-deformation clamping process method based on simulation analysis, and relates to the technical field of mechanical manufacturing. The method comprises the following steps that S1, a design drawing, material characteristic parameters, blank size specifications and technical parameters of a clamp system of a to-be-machined part are collected; according to the method, an integrated simulation model of a part, blank and clamp system is constructed, blank key parameters and the constraint relation of all parts are fused, multi-field coupling simulation is combined, the theoretical deformation field pre-judgment precision is greatly improved, reliable data support is provided for pre-deformation design, a target compensation curved surface is generated through a geometric inversion algorithm, and the pre-deformation design precision is improved. By matching with a pre-deformation clamp with an adjusting mechanism, reverse pre-deformation is realized, differences of different batches of blanks are adapted, machining and rebound deformation are effectively counteracted, simulation and process parameters are corrected through a detection result by means of a closed-loop optimization mechanism, machining precision stability is guaranteed, trial cutting cost and rejection rate are reduced, and the method is suitable for machining of various easily-deformed parts.

The invention belongs to the field of desilting robots, and particularly discloses a suction type underground drainage pipeline intelligent desilting robot and a desilting method.The desilting robot is composed of an in-pipe integrated robot and an inspection well box; the in-pipe integrated robot comprises a hardware structure and a software module, the hardware structure comprises a mechanical assembly, a circuit assembly, a sediment breaking assembly, a sediment conveying assembly and a machine body, and the software module comprises a pipeline sediment intelligent diagnosis module. A drainage pipeline siltation diagnosis module based on a deep learning network is arranged in a deep learning development board to achieve siltation diagnosis, and a central instruction receiving and sending module is used for sending desilting operation instructions to a nail surface type electric hammer, a high-pressure water spray head, a siltation crushing cutter, a silt pumping pipe, a silt discharging pipe and a vacuum sewage suction pump. According to the invention, automatic and intelligent operation of siltation diagnosis and desilting of the underground drainage pipe network in a certain maintenance area can be realized, the efficiency is greatly improved, personnel do not need to enter the pipeline, and the danger is greatly reduced.

The invention relates to the field of vehicle driving motor control, and particularly discloses a wheel side driving motor working state control method and device, and the method comprises the steps: obtaining the instantaneous whole vehicle demand torque according to the real-time accelerator pedal opening degree and the real-time vehicle speed; according to the road gradient and the real-time vehicle speed, the whole vehicle demand torque is predicted; the minimum value of the instantaneous whole vehicle demand torque and the predicted whole vehicle demand torque is taken as the actual whole vehicle demand torque; and controlling the working state of the driving motor according to the actual vehicle demand torque. According to the method, unreasonable driving of a driver is restrained, the actual whole vehicle demand torque is determined by calculating and predicting the whole vehicle demand torque and combining the instantaneous whole vehicle demand torque, power demands of the vehicle under different road conditions and loads are matched, insufficient or excessive power is avoided, the vehicle runs more smoothly, the safety of vehicle driving is improved, and the driving safety of the vehicle is improved. Overload of vehicle mechanical parts is avoided, the service life of the vehicle mechanical parts is prolonged, the working state of the driving motor is reasonably controlled, and energy consumption and vehicle operation cost are reduced.

A hydraulic mechanical component strength testing apparatus and a testing method, relating to the technical field of mechanical component strength testing, for use in performing strength testing on mechanical components with different temperatures. The testing apparatus comprises a frame and a clamping assembly; the clamping assembly comprises two clamping plates and a clamping drive mechanism; a vertically-arranged hydraulic rod is arranged at the top of the frame; a placement platform fixedly connected to the bottom of the frame is arranged below the hydraulic rod; the two clamping plates are located above the placement platform; a placement seat for supporting a mechanical component is arranged between the two clamping plates; a hydraulic sensor for measuring the pressure borne by the placement seat is arranged between the placement seat and the placement platform; the placement platform is further provided with a display in signal connection with the hydraulic sensor; and the clamping plates are each provided with a heating assembly used for heating the mechanical component. The present invention can perform strength testing on mechanical components with different temperatures.

The invention belongs to the field of mechanical part manufacturing, and particularly relates to a welding treatment device for mechanical part manufacturing and an operation method thereof.The welding treatment device comprises a base, a welding head is arranged at the top of the base, a first motor is fixedly connected to one side of the base, and the output end of the first motor extends into the base and is fixedly connected with a two-way lead screw; according to the welding treatment device for mechanical part manufacturing and the operation method of the welding treatment device, the circulating direction of gas can be adjusted by adjusting the position of the lantern ring, the gas can independently enter a pipe, the gas can be sprayed out from the bottom of the gas inlet pipeline, a leakage detecting agent at the welding position of the pipe is dried, and the leakage detecting effect is improved. Through guiding of the inclined face of the inner wall of the gas gathering ring, sprayed gas is more concentrated, through guiding of the two guiding plates, hot gas circulates downwards along the inclined faces of the guiding plates, through wrapping of the inner concave faces of the two baffles, the hot gas is prevented from being rapidly diffused, the retention time of the hot gas around a welding seam is prolonged, and the drying effect on the leakage detecting agent is better.

The invention discloses a chamfering machine for machining mechanical parts, and belongs to the technical field of chamfering machines, the chamfering machine for machining the mechanical parts comprises a fixed rack, and a sliding limiting mechanism is fixedly mounted in the center of the top of the fixed rack; a rotary limiting mechanism is fixedly mounted at the center of the top of the sliding limiting mechanism, a rotary feeding mechanism matched with the rotary limiting mechanism is further fixedly mounted at the top of the fixed rack, and two sets of symmetrically-arranged turning and chamfering mechanisms are slidably mounted on the two sides of the top of the sliding limiting mechanism correspondingly; a servo driving mechanism used for driving the two turning and chamfering mechanisms is installed at the bottom of the sliding limiting mechanism. According to the rotary feeding mechanism simple in design, the left feeding disc and the right feeding disc are controlled by the first servo motor to move, so that the conveying, machining pause and conveying and discharging processes are smoother, the machining pause time is shortened, and meanwhile the overall machining efficiency is improved.

The invention relates to the technical field of mechanical part machining, and particularly discloses a mechanical part machining device which comprises a working table, an auxiliary mechanism, a driving mechanism and a driving mechanism. The end face of the working table is fixedly connected with an L-shaped base, a motor is fixedly installed on the surface of the L-shaped base, and the output end of the motor is fixedly connected with a blade; the auxiliary mechanism is used for feeding workpieces when mechanical parts are cut, the auxiliary mechanism comprises an inclined groove formed in the end face of the workbench, a filter screen is installed in the inclined groove, and a fixed rail is arranged on the end face of the workbench. By arranging the sliding block, the fixed track, the screw rod and the first pressing plate, the screw rod can drive the first pressing plate to move by means of driving of threads, so that a metal plate is stabilized, it is ensured that the metal plate is not prone to loosening or shifting in the machining process, and by means of sliding between the fixed track and the sliding block, movement of the metal plate is achieved; and feeding of the metal plate is achieved.

The utility model relates to the technical field of ship mechanical part machining, in particular to a polishing device for ship mechanical part machining, and solves the problem that in the prior art, ship mechanical parts of different shapes and sizes cannot be conveniently adjusted and fixed, so that the polishing effect is poor. A polishing device for ship mechanical part machining comprises a machining table and a polishing machine, the machining table is provided with a sliding groove, the interior of the sliding groove is slidably connected with a mounting block, the top of the mounting block is provided with a bearing plate through a buffering mechanism, the surface of the bearing plate is fixedly connected with four supporting blocks, and the surfaces of the supporting blocks are in threaded connection with screws; a clamping drill is fixedly connected to the surface of the screw rod, a plurality of limiting grooves are formed in the surface of the bearing plate, and limiting rods are arranged in the limiting grooves in a penetrating mode. According to the polishing fixture, clamping and fixing of parts with different shapes and sizes are guaranteed, so that the parts can be normally polished, and the polishing effect of the parts cannot be affected.

The present invention relates to the field of mechanical component testing technology, and in particular to a vibration testing device for mechanical components of a crane boom, comprising a vibration platform fixedly arranged at the bottom, the top of the vibration platform being used to install a cantilever crane, a fixed platform being arranged on the left side of the vibration platform, a fixed steel frame being arranged on the top of the fixed platform, a cantilever displacement mechanism being installed on the fixed steel frame, the left end of the cantilever displacement mechanism being connected to an externally matched telescopic device, a lifting and lowering position control device being installed at the right end of the cantilever displacement mechanism, and position control testing devices being installed on the front and rear sides of the lifting and lowering position control device, respectively. The present invention can be installed inside a workshop to test the vibration state of a cantilever crane under different vibration simulation working conditions and obtain the vibration frequency and amplitude, effectively monitor whether different vibration points of the current cantilever crane have exceeded the safety threshold, and issue an alarm after timely uploading.

The utility model relates to the technical field of mechanical part machining, and discloses a punching device for mechanical part machining, which comprises a machining table, the top of the machining table is provided with a collecting groove, and one side of the collecting groove is provided with a movable opening; the first supporting column is arranged at the top of the machining table; the second supporting column is arranged on the top of the machining table. By starting the telescopic rod, the telescopic rod operates to drive the clamping plate to move through the first connecting block, the clamping plate moves to drive the rack to move through the second connecting block, the rack moves to drive the other rack to move through the gear, and the other rack moves to drive the other clamping plate to move through the other second connecting block. The two clamping plates move oppositely to clamp the mechanical part needing to be punched, then the motor is started, the motor operates to drive the threaded rod to rotate, the threaded rod rotates to drive the placing table to move, the placing table moves to drive the mechanical part to move, and therefore the effects of clamping the mechanical part and driving the mechanical part to move are achieved.

The invention discloses a subway tunnel construction segment water seepage detection device, and relates to the technical field of subway tunnel construction segment water seepage detection. The subway tunnel construction duct piece water seepage detection device comprises a frame, the bottom of the frame is fixedly connected with an electric moving part, the bottom of the frame is fixedly connected with an electric steering part, the top of the frame is fixedly connected with an auxiliary mechanism, and the frame is provided with a remote control chip. Power-on starting of the electric moving part can drive the whole part to move, and power-on starting of the electric steering part can change the moving direction of the frame. According to the subway tunnel construction duct piece water seepage detection device, through cooperation of the electric moving component and the steering component, the device can automatically move along the surface of a duct piece, the advancing direction is adjusted, and detection areas at different longitudinal positions are covered; a first mechanical part in the auxiliary mechanism drives the connecting rod to lift, and a second mechanical part drives the detection mechanism to rotate.

Provided is a game system with gears and indicia, for modular game information record-keeping and record-changing devices, systems, and associated methods based on sets of mechanical gears having game indicia provided thereon. The architecture of the system uses combinations of mechanical gears, cams, shafts, clutches of various types, and other mechanical components that constitute an analog “computer” performing basic mathematical functions, managing data, or performing analogs for life principles—such as the impact of events, physics-based or fantasized realities, interpersonal relationships, behavioral characteristics, conflict dynamics, etc.

The invention discloses a new energy automobile motor shaft damage detection method, and relates to the technical field of mechanical part tests.The new energy automobile motor shaft damage detection system comprises an eddy current detection module, an ultrasonic detection module and a track setting module, and the eddy current detection module sweeps a motor shaft through an eddy current detection method; the estimation module is used for estimating approximate distribution of distortion cracks and fatigue cracks, the ultrasonic detection module is used for scanning axial areas of the distortion cracks and the fatigue cracks by adopting a spiral scanning method and a circumferential stepping scanning method, and the track setting module is used for setting a scanning track according to the axial distribution of the fatigue cracks and the distortion cracks. The eddy current detection module comprises an eddy current sensor, a signal processing unit and a data acquisition module, the signal processing unit is electrically connected with the eddy current sensor, and the data acquisition module is electrically connected with the signal processing unit.

The invention provides a rolling bearing small sample open set fault diagnosis method, and belongs to the field of fault diagnosis. The problems of insufficient fault feature extraction capability and open set threshold strategy stiffness caused by rolling bearing data scarcity in the prior art are solved. The method comprises the following steps: constructing a small sample closed set classification module, wherein the module realizes fault feature extraction and classification by fusing a dense connection network and a prototype network; an open set recognition module is designed, and the open set recognition module constructs a self-adaptive multi-class 3 sigma threshold judgment mechanism based on the self-encoder reconstruction error to distinguish a known fault class and an unknown fault class; a to-be-diagnosed bearing vibration signal is input into the closed set classification module for feature extraction and prototype matching, meanwhile, a reconstruction error is calculated through the open set recognition module and compared with a dynamic threshold value, if the error exceeds the threshold value, it is judged that the fault is an unknown fault category, and otherwise, the closed set module outputs a specific fault category. The method is applied to mechanical part detection.

The invention discloses a voice-driven mechanical element modeling method and system. A user inputs a natural language instruction containing a design intention into the CAD system through voice, and the natural language instruction is analyzed into a structured operation instruction; meanwhile, selecting a reference model, generating a geometric code corresponding to each surface based on a local geometric attribute corresponding to each surface of the model, and constructing a geometric structure coding matrix; predicting each machining surface in the machining features by using the machining surface prediction network to obtain a sequence formed by all machining surface IDs of the machining features in sequence, and recording the sequence as a machining surface ID sequence; and finally, executing API (Application Program Interface) calling of the CAD platform, and finally obtaining a model of the target mechanical element. According to the method, by connecting the high-level design intention and the bottom-level geometric operation of a designer, the tedious interaction and cognitive burden caused by manual selection and operation of low-level geometric elements (points, edges and surfaces) in traditional direct modeling is avoided, and the design efficiency is remarkably improved.

The invention belongs to the technical field of agricultural robots, and particularly relates to a multi-degree-of-freedom double-arm pear fruit picking robot based on an agricultural machinery and agricultural technology fusion idea, which comprises a walking chassis, a picking system, a fruit collecting system, a visual system, a control system and an endurance system, the walking chassis is mainly used for bearing mechanical parts and picked fruits, walking in a field and providing power for the whole picking robot, the picking system is carried on a picking robot body and mainly used for grabbing recognized pears capable of being picked, and the fruit collecting system is carried on the picking robot body and used for collecting the fruit collected by the fruit collecting system. The picking robot body is used for conveying the picked pears into the fruit collecting box, and the visual system is carried on the picking robot body. The device can adapt to the picking operation of standardized pear garden planting agriculture in different planting modes, is highly integrated and automatic, can effectively improve the pear fruit picking operation efficiency, greatly reduces the dependence on the labor cost, and achieves the intelligent upgrading of agricultural production.

The invention relates to the technical field of grinding mills, and discloses an ultra-precise double-sided grinding miller which comprises a rack, a supporting frame is fixedly mounted at the top of the rack, a base is fixedly mounted in the middle of the top of the supporting frame, and a hydraulic cylinder is fixedly mounted at the top of the base; and a hydraulic rod is fixedly mounted at the top of the grinding assembly. According to the ultra-precise double-sided grinding machine, when a hydraulic rod drives a lantern ring to move downwards, a grinding block makes contact with a mechanical part firstly, along with continuous downward extrusion of the hydraulic rod, a clamping ring is extruded to drive a ring sleeve below the clamping ring to slide upwards on the surface of a positioning rod, and at the moment, a limiting ring slides on the surface of a sliding supporting rod while moving upwards along with the ring sleeve; the outer side of the extrusion bag is affected by deformation to extend outwards so as to be attached to the upper portion of the mechanical part, the grinding position of the mechanical part is limited, and it can be guaranteed that in the grinding process of the mechanical part, grinding pressure can be more evenly distributed on the surface of the mechanical part.

The invention relates to the technical field of mechanical drilling, and discloses adjustable agricultural machinery production and processing drilling equipment which comprises a bottom plate, a workbench is fixedly connected to the middle end of the top of the bottom plate, a supporting plate is fixedly connected to the side, away from the workbench, of the top of the bottom plate, and a drilling mechanism is fixedly connected to the side, close to the workbench, of the supporting plate. The device further comprises a supporting mechanism, the supporting mechanism comprises a sliding block, the bottom of the sliding block makes contact with the top of the bottom plate, a connecting rod is fixedly connected to the top of the sliding block, an attaching block is fixedly connected to the side, away from the sliding block, of the connecting rod, a fixing block is arranged on the outer wall of the connecting rod, and the inner wall of the fixing block is fixedly connected with the outer wall of the connecting rod. By arranging the supporting mechanism, when a mechanical part is placed in the supporting mechanism, the supporting mechanism can automatically centralize the part, in the drilling process, the continuous centralizing effect effectively prevents the part from inclining, it is ensured that the drilling position is accurate, and the machining precision is improved.

The utility model discloses a double-cylinder EPB (electronic parking brake). The brake comprises a driving mechanism assembly, a shell assembly, a transmission mechanism assembly, a friction plate assembly and a bracket assembly, the driving mechanism assembly comprises a motor and a reduction gear box, and the driving mechanism assembly outputs motor torque through two output ends; the shell assembly serves as an external structure of the brake and accommodates and fixes internal mechanical components. The transmission mechanism assembly comprises two transmission mechanisms which convert motor torque output by the two output ends of the driving mechanism assembly into axial motion to drive a piston to move. The friction plate assemblies comprise an inner friction plate assembly and an outer friction plate assembly which are driven by the piston to clamp the brake disc; the support assembly is connected with the shell assembly through bolts, fixes and supports the brake, and guides and limits path movement of a piston and a friction plate in the braking process.

The invention relates to the technical field of mechanical parts, and discloses a high-bearing engineering plastic worm gear applied to a light truck electric power steering system and a manufacturing process, and the manufacturing process comprises the following steps: pretreatment of a polymer base material, preparation of a composite reinforcing material, preparation of an injection molding raw material, precise injection molding, post-treatment and detection. After a polymer base material is subjected to fluorination activation treatment, the surface energy of the material is reduced, the interfacial compatibility with a composite reinforced material is enhanced, and through the synergistic effect of chemical bonding and physical anchoring formed between matrix resin and a modified reinforcement body, the interfacial layering tendency of engineering plastic and a fiber reinforced phase is overcome, so that stress transmission is more uniform; meanwhile, the functional additive components generate an in-situ synergistic effect in the precise injection molding process, and form a multi-stage enhanced network with matrix resin, so that the worm wheel matrix is endowed with excellent overall bearing strength and fatigue fracture resistance, and the structural integrity under the working conditions of high load and high-frequency steering is ensured.

A friction spacer adapted to be interposed between two mechanical components in order to transfer a force between the two mechanical components, the friction spacer including a flat part having two opposite surfaces defining a thickness, and a plurality of protuberances projecting from at least one of the surfaces, the protuberances of the plurality of protuberances extending from the at least one of the opposite surfaces by a determined average height. The flat part and the protuberances are produced from the same metal material, and the same metal material continuously extends between the flat part and the protuberances.

The invention discloses a mechanical part welding mechanism with a correction function, and relates to the technical field of mechanical parts. The mechanical part welding mechanism with the correction function comprises a vertical table, a workbench is arranged on the left side surface of the vertical table, a guide rail is arranged at the top end of the workbench, and a correction device is slidably mounted at the top end of the guide rail; a welding device is arranged at the top end of the vertical table, a linkage rod is arranged on the surface of the welding device, a limiting knocking device is arranged at the right end of the correcting device, a protection door is arranged at the front end of the workbench, a protection device is arranged at the front end of the workbench, and a fixing table is arranged at the front end of the workbench. According to the welding device, the moving plate moves upwards to be in contact with the fixed plate and then is fixed, so that the top of a to-be-welded object is kept horizontal, and the situation that the welding quality is affected due to welding errors caused by different fixing positions of the two objects due to different thicknesses of the to-be-welded objects during welding is prevented.

The invention relates to the technical field of mechanical part surface defect detection, in particular to a mechanical part surface defect detection system and method.The method comprises the steps that an original point cloud data set of the surface of a mechanical part is collected; calculating the normal deviation distance from each sampling point to the surface of the standard CAD model along the local normal vector direction; determining an included angle between a local normal vector and a neighborhood average normal vector of each sampling point; calculating to obtain a point cloud credibility index of the sampling point; constructing a dynamic defect judgment threshold value of the sampling point; comparing the normal deviation distance with a dynamic defect judgment threshold value; marking the sampling points as defect candidate points in response to the condition that the normal deviation distance is greater than a dynamic defect judgment threshold value; if the dynamic defect judgment threshold value is not greater than the dynamic defect judgment threshold value, marking as a non-defect point; performing spatial clustering processing on all the sampling points marked as the defect candidate points to form independent defect areas; according to the method, the inherent contradiction of a traditional fixed threshold value method is solved, and the detection accuracy and reliability are remarkably improved.

The laser cutting equipment for mechanical part machining comprises a machining table, a steel pipe part is arranged above the machining table, a first vertical plate is fixedly connected to the top of the machining table, a fixing cover is fixedly connected to the end, away from the steel pipe part, of the first vertical plate, and a clamping mechanism is arranged on the steel pipe part; a second vertical plate is arranged at the top of the machining table, a hollow column rotationally connected with the second vertical plate is arranged on the second vertical plate in a penetrating mode, a circular plate is fixedly connected to the outer wall of the hollow column, a laser cutting mechanism is arranged on the circular plate, and a dust collecting mechanism is arranged on the second vertical plate. Steel pipe parts of different specifications and sizes can be clamped and fixed through the clamping mechanism, and the application range is wide; the angle of the cutting face can be adjusted through the laser cutting mechanism, and different cutting machining requirements are met; and dust generated in the cutting process can be collected through the dust collecting mechanism, air purification is achieved, and the health of workers is guaranteed.

A portable machinery or vehicle control training aid, comprising a simulator that gives haptic feedback including angular movement, vibration, and responsiveness to use of controls; the haptic frame (54) provides structural frames for electrical components, mechanical components, and various sensors to be fixed onto. The haptic frame (54) movably joined to a plurality of linking mechanisms (55). In an embodiment as shown in Figs. (12) and (13), a pair of linkages (55) are connected preferably to the center of one side 61 of the haptic frame (54). Two linkages (55) are likewise connected to the diagonal bars (62) of the haptic frame (54). This configuration provides a balance of stable support for the live floor and safety to the trainee while also being mobile enough to produce realistic motions pertaining to yaw, roll, pitch, heave, sway, and surge. The pair of linkages (55) which are connected to the center side (61) of the haptic frame are each connected to drive motors (21). The drive motors (21) use the hydraulics needed to move the live floor (11) correspondingly to the virtual terrain affecting the heavy machinery and the controls inputted by the user or trainee.