62 results about "Eccentric loading" patented technology

The invention belongs to the technical field of ship bearings, and particularly relates to a ship bearing radial loading test bench and method for simulating ice load and water immersion working conditions, and the method comprises the steps: installing a to-be-tested intermediate bearing on a test platform, enabling the intermediate bearing to sleeve a test shaft, starting a cooling water circulation system to control the flow, cooling water enters a cooling water coil pipe to establish oil pool cooling circulation; a driving motor is started; a test shaft stably operates through equipment such as a reduction gearbox and the like; a dynamic pressure lubrication state is established, a radial dynamic load or a stable constant load is applied through a hydraulic loading system to simulate an icebreaking load working condition, and a simulated water body is injected into a water tank; the test conditions of the intermediate bearing in a ship immersion environment are constructed through water pressure adjustment, the temperatures of lubricating oil, a bearing bush and cooling water are monitored in real time, the loading force is adjusted through feedback data, and the performance of the intermediate bearing is judged after the test is finished. The problems that ice excitation and soaking environment simulation are insufficient and a loading structure is eccentric in the prior art are solved, and high-precision cooling and thermal stability evaluation are achieved.

The invention discloses a cylindrical roller modification method based on a non-uniform rational B-spline curve, and relates to the technical field of bearing design. According to the method, a bearing contact mechanical model considering the roller modification effect is constructed, a modification contour is constructed based on a non-uniform rational B-spline curve (NURBS curve), an optimization model with the basic reference rated life of a bearing as a target function is established on the basis of meeting geometric constraint conditions, and an optimization algorithm is adopted for solving to obtain a final modification curve. The established contact mechanical model comprises a bearing static balance model and a roller-raceway contact mechanical model and is used for calculating load distribution and contact stress under the unbalance loading working condition. Compared with a traditional symmetrical logarithmic modification method, the problem that the axial stress of the roller is not uniform under unbalance loading can be effectively solved, the uniformity of contact stress distribution is improved, and the fatigue life of the bearing is prolonged.

The utility model relates to an electric sliding table with a double-guide structure. Comprising a guide rail, a synchronous belt arranged around the guide rail, a sliding table assembly arranged on the synchronous belt, synchronous wheel structures installed at the two ends of the guide rail and a driving device used for driving the synchronous belt to operate. The sliding table assembly slides on the two sides of the guide rail. The synchronous belt is wound on the two groups of synchronous wheel structures; the driving device is in transmission connection with one group of synchronous wheel structures; according to the technical scheme, the problems that in the prior art, limitation of a sliding table is particularly prominent, a single-side guide structure is prone to clamping stagnation when bearing eccentric loads, the equipment shutdown frequency is increased due to the loosening risk of a synchronous belt, a tensioning mechanism lacks the dynamic compensation capacity, belt length changes caused by temperature rise or vibration cannot be automatically adjusted, frequent manual intervention is needed, and the working efficiency is high are solved. And meanwhile, due to the lack of modular design, the time consumption for replacing or maintaining the synchronous belt is obvious, and the continuity of a production line is influenced.

The present application belongs to the technical field of hoisting equipment, and provides a steel box girder construction hoisting device, which comprises a lifting ring one and a lifting rope, the lifting rope is provided with multiple ropes, and the top of each rope is connected with the lifting ring one; the other end of the lifting rope is provided with an angle self-adaptive assembly, the bottom of the angle self-adaptive assembly is provided with a horizontal limiting assembly, and the gravity lifting clamping mechanism is arranged at the bottom of the steel box girder below the horizontal limiting assembly; the angle self-adaptive assembly comprises a bearing plate, four side edges in the top of the bearing plate are symmetrically provided with arc-shaped track frames, a sector gear plate and an arc-shaped swing plate are respectively arranged in the inner side groove corresponding to the arc-shaped track frames, the arc-shaped guide sliding plates one and two are arranged in a cross mode between the sector gear plate and the arc-shaped swing plate, and the groove of the arc-shaped guide sliding plate two is provided with a sliding block two in sliding fit. The present application has the following beneficial effects: the hoisting point angle is realized in real-time self-adaptive adjustment, the problems of shaking, tilting and eccentric loading in the hoisting process of the steel box girder are completely avoided, and the hoisting posture is stable.

The invention belongs to the technical field of mining, and relates to a test device and a test method for simulating interaction between a roof and an ore pillar, and the test device comprises pressurization equipment, a support, an elastic steel plate and a load transmission assembly. The support comprises a bottom plate and two supporting columns arranged on the bottom plate, and the distance between the two supporting columns is adjustable. A sample is placed above the bottom plate and located between the two supporting columns. The elastic steel plate is arranged on the two supporting columns and used for simulating a top plate, and the bottom face of the elastic steel plate makes contact with the top face of the sample. The load transmission assembly is used for converting concentrated loads output by the pressurization equipment into distributed loads and acting the distributed loads on the elastic steel plate. According to the scheme, the interaction between the top plate and the ore pillar can be simulated, the stress, deformation and damage conditions of the ore pillar under the non-equal-span stope structure under the eccentric load can be simulated, meanwhile, a top plate-ore pillar model does not need to be poured or built, and the method has the advantages of being short in test period, low in cost and the like.

This invention relates to a method for testing the fracture toughness of anisotropic eccentrically loaded single-sided notched tensile specimens, comprising: S1, establishing a two-dimensional plane stress model of anisotropic material ESET specimens; S2, mesh generation; S3, calculating displacement, strain, and stress field to obtain the stress intensity factor K and compliance C under different initial crack lengths and anisotropic material parameters; S4, establishing crack length calculation formulas and stress intensity factor calculation formulas based on compliance under different eccentric loading rates, initial crack lengths, and anisotropic material parameters. This invention allows for rapid and accurate measurement of crack length simply by measuring the deformation of the material under external force; it reliably extends the application range of standardized eccentrically loaded single-sided notched tensile specimens from traditional isotropic metals to modern advanced materials such as composite materials, additive manufacturing alloys, and rolled plates, while ensuring the calculation accuracy under anisotropic conditions.

The invention provides an anti-unbalance-loading construction lifting platform and a using method thereof, relates to the technical field of lifting equipment, and solves the problems that in the prior art, in the operation process of a construction lifting platform, the unbalance loading phenomenon easily occurs, once unbalance loading occurs, abrasion of mechanical parts of the lifting platform is accelerated, the platform is likely to incline, operation is unstable, and the service life of the lifting platform is prolonged. And overturning and falling safety accidents are caused. According to the technical scheme, an unbalance load sensing element continuously collects platform load and inclination data and transmits the data to an electrical control system; the central processing unit analyzes data in real time and judges the unbalance loading condition and degree of the platform. If unbalance loading is detected, unbalance loading braking and unbalance loading alarming are started in sequence according to the unbalance loading grade; when the unbalance loading condition occurs, braking, warning, self-locking and leveling measures can be rapidly started, the unbalance loading risk of the platform is reduced to the minimum, the safety of personnel and material transportation is guaranteed, meanwhile, the abnormal loss of equipment caused by unbalance loading is reduced, and the operation stability and reliability of the construction lifting platform are improved.

The application discloses an anchor bolt shearing strength test device, and relates to the field of new anchor bolt material detection. The upper end of a preset base frame is provided with a driving motor assembly, the surface of the preset base frame is provided with a hydraulic driving assembly, and the output ends of the driving motor assembly and the hydraulic driving assembly are both provided with movable nesting pieces. The anchor bolt shearing strength test device is provided with a guiding and locking mechanism. The guiding and locking mechanism keeps the eccentricity-preventing and centering positioning state of the detected workpiece. The upper and lower ends of the locking butt joint pieces work together to keep the anchor bolt centered during the locking process, ensure that the shearing force is always perpendicular to the anchor bolt axis, and make the guiding and locking mechanism and the guiding spherical wrapping piece on the end side contact each other. The guiding spherical wrapping piece provides flexible wrapping while its uniform expansion characteristic further assists the anchor bolt in keeping the centered position, effectively eliminates the additional bending moment caused by eccentric loading, makes the measured shearing strength value closer to the real strength of the material, forms multi-dimensional positioning constraints, and improves the test accuracy and repeatability.

This invention provides an intelligent method, apparatus, equipment, and medium for adaptive adjustment of the bulk density of loaded materials. The method includes: acquiring real-time status data corresponding to the loading task during the execution of the loading task; updating the bulk density value of the material loaded in the truck bed, and determining the theoretical material height and initial telescopic stroke based on the task description information; generating the material overflow probability and material distribution based on visual data of the material in the truck bed; adjusting the initial telescopic stroke to obtain the target telescopic stroke using a sliding mode controller based on hierarchical reinforcement learning; and controlling the telescopic movement of the telescopic cylinder according to the target telescopic stroke to drive the telescopic chute, thereby achieving adaptive adjustment of the height of the material loaded in the truck bed. This invention can automatically adjust the height of the material loaded in the truck bed to achieve uniform, flat, and non-eccentric loading requirements.

This invention relates to a scaled-down rotating cable anchoring loading device and testing method, belonging to the field of civil engineering structural testing and measurement. It addresses problems such as eccentric loading, impure force distribution, unstable load, and poor spatial adaptation in traditional scaled-down models. The device comprises a box, a pulley guiding mechanism, a steel beam, and a top loading device. The box is secured to the scaled-down anchors using clamps or backfill. The pulley guiding mechanism consists of guide rails, a sliding table, vertical pulleys, and two sets of horizontal traction pulleys, allowing for three-dimensional adjustment to ensure the horizontal guidance of the cable. The top loading device employs a jack structure, using a lifting piston rod to vertically raise and lower the loading arm synchronously, applying horizontal tension and possessing a self-locking pressure-holding function, enabling long-term stable load holding. The testing method involves device installation, anchor and cable placement, pulley leveling, pre-loading, self-locking pressure holding, and data acquisition to complete the test. This invention achieves pure horizontal, high-precision, stable, and controllable loading. It features a compact structure, simple operation, and accurate acquisition of mechanical parameters, making it suitable for cable anchored scaled-down model testing.

The invention relates to an axial eccentric test loading control device and method, in particular to test loading equipment capable of achieving eccentric loading and monitoring loading loads in real time, and belongs to the field of aircraft design and manufacturing. Comprising a load transmission shaft, a compression loading sleeve, a tensile loading sleeve, a compression force measuring sleeve, a tensile force measuring sleeve, a stress rod, an eccentric adjusting spring and a connecting bolt, eccentric loading adjustment can be achieved in the testing process, and the adjusting capacity of testing equipment is improved. Load real-time monitoring can be achieved, and the loading capacity of testing equipment is improved. The device is simple in structure and convenient to carry out and use, and has high economic benefits. The method is high in universality, can be applied to multiple test industries, and is wide in application range.

The invention relates to an electric iron member tension test device, which relates to the related technical field of material tension test, and comprises a base, an extrusion seat, a positioning mechanism, a hanging piece, a detection mechanism, a sliding plate, a sliding seat, a trigger mechanism, a clamping mechanism, a dynamometer and a hydraulic jack, the problem that eccentricity of the U-shaped hanging ring after being placed is not considered in the placing process in the prior art can be solved, eccentric loading can cause single-side stress concentration of the hanging ring, actually-measured fracture load is possibly lower than a true value, product quality is misjudged, the hanging ring can be accompanied by additional bending moment during eccentric stress, non-axial deformation is caused, calculation of parameters such as elasticity modulus is interfered, and the product quality is influenced. The problems that metal fragments tend to be sprayed to the stress concentration side during asymmetric fracture, the personnel injury probability is increased, the axial direction of the high-quality U-shaped hanging ring is in a symmetrical deformation state under pure pulling force, and if abnormal lateral bending occurs, the situation of inclusions in materials or uneven heat treatment can be possibly indicated are solved.

The utility model relates to the technical field of beam bridge construction, in particular to a hanging basket pre-pressing device which is used for continuous beam bridge construction and comprises a counter-force frame, a connecting mechanism and a pre-pressing mechanism. A preformed hole is formed in a truss used during construction of a continuous beam bridge, the counter-force frame is installed on the truss corresponding to the preformed hole through the connecting mechanism, a bottom die is arranged between adjacent hanging baskets at the bottom end of the truss, and the pre-pressing mechanism is arranged between the counter-force frame and the bottom die. In addition, the pre-pressing mechanism acts on the reaction frame, and the hanging basket elastically deforms under the reaction force of the reaction frame. The hanging basket pre-pressing device can avoid unbalance loading, overload and other risks in the pre-pressing process, meanwhile, the hanging basket pre-pressing device is not limited by sites and heights, and the hanging basket pre-pressing construction safety can be effectively improved.

The application discloses a slide beam structure of a single-arm hydraulic machine, and relates to the technical field of hydraulic equipment.The slide beam structure comprises a columnar beam body and a matching part arranged opposite along the radial direction of the beam body, both the matching parts are distributed along the axial direction of the beam body and extend outward along the radial direction in a wing shape; the matching part has a U-shaped guide surface, a vertical guide surface is arranged on the beam body, the vertical guide surface is adjacent to one side surface of the U-shaped guide surface and is perpendicular to the one side surface, and an adjusting mechanism for adjusting the guide gap in the radial direction of the beam body is arranged on the vertical guide surface; in the application, the slide beam is in a cylindrical or prismatic shape, the guide size of the slide beam is lengthened, the guide precision is improved, the extrusion stress of the guide rail surface under the eccentric load condition is reduced, the service life of the slide beam of the hydraulic machine is prolonged, the slide beam structure is more suitable for the single-arm hydraulic machine with large tonnage and small table surface, the effect is remarkable, and the application lays a foundation for designing and manufacturing the single-arm hydraulic machine with higher structural strength and stronger eccentric load resistance.

The invention provides a hard rock elastic mechanical parameter obtaining method and device under the eccentric loading condition, and belongs to the technical field of optical measurement and numerical simulation. The method comprises the steps that first displacement is obtained through a uniaxial loading experiment; introducing an eccentric loading coefficient, and calculating in finite element software to obtain a second displacement; establishing a multi-target error function according to the first displacement and the second displacement; outputting the final elastic modulus, Poisson's ratio and eccentric loading coefficient under the condition that the multi-target error function reaches the convergence condition; under the condition that the multi-objective error function does not reach a convergence condition, iteratively optimizing mechanical parameters by adopting a simulated annealing particle swarm optimization algorithm improved by a dynamic cooling strategy based on particle swarm diversity, and incorporating an eccentric loading coefficient into a to-be-inverted parameter; according to the method, the inversion analysis of the rock elastic mechanical parameters and the eccentric loading coefficient is realized, and the inversion precision is improved by adopting the improved simulated annealing algorithm.

This invention relates to a toothless planetary roller screw pair, comprising a planetary nut, a planetary screw, and a plurality of planetary rollers disposed between the planetary nut and the planetary screw. Each planetary roller has a threaded portion in its center that mates with the planetary screw and the planetary nut. Each planetary roller has several annular grooves distributed axially at both ends. Each planetary nut has several annular grooves at both ends that mate with the annular grooves of the planetary rollers. The annular grooves and annular grooves can slide relative to each other. This invention uses annular grooves and annular grooves at both ends to form a sliding raceway contact pair, replacing the traditional gear-internal gear ring mating structure. The contact between the annular grooves and annular grooves ensures complete contact across the entire raceway, resulting in strong load-bearing capacity and significantly improving the rollers' resistance to eccentric loading and skewing. Furthermore, the mating clearance between the annular grooves and annular grooves can be machined and controlled according to actual working conditions, resulting in higher constraint and limiting accuracy, stronger stability and impact resistance, and significantly reduced machining and assembly difficulty.

This invention relates to the field of tensile testing machine technology, specifically to an auxiliary tensile device for a tensile testing machine and its working steps, including a bending stress adjustment device, a hollow rotating device, a flat pushing mechanism, a preload sensor, and a controller; the bending stress adjustment device is used to automatically adjust the bending stress generated by the eccentric load on the lapped specimen; the hollow rotating platform is used to adjust the up-and-down movement of the clamping body; the flat pushing mechanism is used to realize the left-and-right movement of the jaws; the preload sensor (6) is used to detect the clamping force during the clamping process, and the controller controls the start and stop of the motor of the hollow rotating device (2) based on whether the detected clamping force reaches a preset value. The technical solution of this invention has the following advantages: high degree of automation, precise control of clamping force, ability to eliminate the bending stress generated by the lapped specimen, reduction of environmental noise, and improvement of working comfort.

The utility model belongs to the technical field of concrete tensile deformation test, and particularly relates to a concrete tensile deformation test device, which comprises a frame, the frame is concentric-square-shaped, one side of the inner wall of the frame is fixedly provided with a motor, and two sides of the inner wall of the frame are rotatably connected with two symmetrically distributed two-way screws; the two shells are installed on the two sides of the inner wall of the frame in a sliding mode, and a measuring center is fixedly installed on one side of each shell; the moving assembly is arranged in the frame and is used for driving the two shells to move; the synchronous assembly is arranged outside the two shells and used for driving the two threaded sleeves to rotate at the same time, the two ends of concrete are clamped and fixed at the same time, the clamping strength is consistent, and the situation that due to the fact that the clamping strength of the two ends of the concrete is inconsistent, eccentric loads are generated in the concrete stretching process, and the clamping strength of the two ends of the concrete is not consistent is avoided. And therefore, convenience is brought to the use of the working personnel.

This invention relates to the field of bridge structural health monitoring and reinforcement optimization technology, providing a method and system for analyzing the structural condition of old concrete T-beam bridges based on multi-data fusion. The method includes: predicting the comprehensive impact value of eccentric loading on the side beams of the target old concrete T-beam bridge within a preset operating cycle; when the comprehensive impact value of the eccentric loading exceeds a judgment interval, generating a correction factor based on the degree of exceedance relative to the judgment interval; and correcting the initial repair and reinforcement parameters according to the correction factor to obtain optimized repair and reinforcement parameters. This invention identifies anomalous intervals of coordinated response that are difficult to detect using traditional methods, and on this basis, introduces a correction factor based on the degree of exceedance to continuously and quantitatively adjust the initial repair and reinforcement parameters, improving the matching between the repair plan and actual operating conditions. This invention can improve the targeting and structural safety of side beam repair, reduce the risk of misjudgment, and has good engineering application value.

The utility model provides a kind of concrete column eccentric loading device suitable for multiple eccentricity, including the loading plate being connected with loading machine and the pressure plate being set above concrete column, loading head is equipped below the loading plate, V-shaped groove corresponding with the loading head is equipped above the pressure plate, multiple V-shaped grooves are equipped at intervals, when multiple eccentricity test is needed, loading head is moved to the corresponding interval above corresponding V-shaped groove, then test starts, so that the test problem of multiple eccentricity of concrete column eccentric loading test is solved, by connecting screw rod and guiding device on loading head, the position of loading head can be adjusted by screw rod, and loading head can be moved to the next V-shaped groove.

The present invention discloses a magnetofluidic sealing device, comprising a base, a magnetofluid seal, and at least two groups of radial support structures; in the present invention, the roller support is in contact with the main shaft only in multiple local areas and is installed through the action of pre-tightening force, so as to ensure the positioning accuracy between the rotating shaft and the magnetofluid seal; by adjusting the pre-tightening force, the gap in each part of the circumferential direction can be ensured to be uniform while allowing the rotating shaft to rotate freely; the base of the bellows-shaped structure allows the magnetofluid seal installed thereon to have a small range of radial deflection as a whole while bearing the axial load; when the rotating shaft deflects under the action of the eccentric load, the magnetofluid seal can swing precisely and synchronously with the rotating shaft under the driving action of the roller support, thereby ensuring that the sealing gap between the sleeve on the rotating shaft and the pole shoe in the magnetofluid seal remains constant, and effectively avoiding the collision between the sleeve and the pole shoe due to the radial swing of the rotating shaft.

The utility model relates to steel support axial force adjusting device technical field especially relates to a kind of foundation pit steel support axial force adjusting device.Its technical scheme includes the pedestal applied to steel support and live joint, and the both sides of the pedestal are slidably installed with support rod, and the support rod is fixedly installed with jack, and it further includes the centering component installed on the pedestal, the centering component drives the middle part of pedestal to move to the position coinciding with steel support axis, and the pedestal is installed with the driving assembly of driving jack synchronous reverse movement.This utility model can prevent eccentric loading by the centering component, and avoid steel support tube wall under the combined action of superhigh local compressive stress and bending moment, partial bulging, wrinkling or even crushing at the position of maximum stress, prevent local instability to weaken the overall load-carrying capacity of steel support.

The utility model discloses a universal testing machine clamp suitable for an open type high-temperature furnace, which comprises a connecting rod, a square right-angle U-shaped frame and a clamp, and the connecting rod is connected with a universal testing machine; the square right-angle U-shaped frame is connected with the connecting rod, a groove is formed in one end of the square right-angle U-shaped frame, and a through hole is formed in the other end of the square right-angle U-shaped frame; the clamp is installed between the two square right-angle U-shaped frames which are oppositely arranged through the through holes and the grooves. According to the utility model, the square right-angle U-shaped frame is adopted, so that the pull rod realizes compression loading under the action of tensile load, the instability hidden danger of a slender rod under the compression working condition is avoided, and the space of the compression clamp is reduced to the maximum extent; the device is small in size and can be easily applied to a small-volume open type high-temperature furnace; the square right-angle U-shaped frame adopts concentric shaft sliding hole matching, so that coaxial loading can be realized, and the problem of eccentric loading caused by non-coaxial compression loading is effectively avoided.

The invention discloses an anti-eccentric loading tool device for an axial loading test of a stiffened plate. The device belongs to the technical field of ship and ocean engineering structure tests and is composed of a stiffened plate test piece, a steel head assembly, an end loading clamp, a side clamp and a supporting base. The steel head is welded to the end of the stiffened plate according to the neutralizing shaft, the loading clamp is adopted for clamping, it is ensured that loading force acts along the neutralizing shaft of the stiffened plate, and end face bending moment is avoided; meanwhile, adjustable clamps are arranged on the two sides of the stiffened plate, flexible adjustment and clamping are conducted according to the position of the test piece, accurate simulation of the four-side simple support boundary conditions is achieved, and the loading precision and the test reliability are improved; according to the invention, high-precision loading path control and real boundary condition reproduction are realized through a fixed loading end, centering steel head welding, an adjustable side clamp and a rigid base; the device can prevent loading eccentricity, eliminate end face bending moment and improve loading precision and repeatability; and meanwhile, the device is suitable for buckling and ultimate bearing capacity tests of different types of stiffened plates.

The invention provides a press machine and the like capable of detecting die abnormality in a plurality of steps. The press machine includes: a detection unit that detects a load value when a material to be processed is press-processed; a storage unit that associates and stores the load value for one cycle amount of pressing detected by the detection unit with identification information of a die attached to the press when the load value is detected; a calculation unit that obtains an eccentric load for each predetermined press angle on the basis of the stored load value for one cycle volume, and generates distribution data of the eccentric load for each die; and a determination unit that determines an abnormality on the basis of an eccentric load for each predetermined press angle obtained on the basis of the load value for one cycle amount detected by the detection unit and on the basis of the distribution data of the eccentric load. The distribution data of the eccentric load corresponds to a mold mounted on the press machine when the load value is detected; and a notification unit that notifies an abnormality on the basis of a determination result by the determination unit.

The invention discloses a clamp device and a test method suitable for a bending fatigue test under displacement control of a T-shaped joint. Belongs to the field of welding structure fatigue performance testing. Comprising an upper clamp, a lower clamp and a plurality of bolts, a cylindrical structure arranged at the bottom of the upper clamp is in contact with an upper plate positioned in the middle of the T-shaped joint test piece, and the center of the cylindrical structure is offset from the central axis of the T-shaped joint test piece, so that the upper clamp forms eccentric loading in the process of moving downwards along with the hydraulic wedge block, and the lower clamp is rigidly connected with the T-shaped joint test piece through a plurality of bolts. Through reasonable structural arrangement, the upper clamp can accurately transmit displacement; meanwhile, the real stress mode of the test piece under the bending load is ensured through the high-rigidity constraint of the lower clamp. The objective of the invention is to improve the loading stability and the displacement control precision and ensure the true and reliable stress distribution, so that the accuracy and repeatability of the bending fatigue test of the T-shaped welding structure are obviously improved.

The invention relates to a marine floating body bending and torsion ultimate strength model test device and method, and the method employs the principle of four-point bending eccentric loading, generates bending and torsion and torque on a test section at the same time, achieves the synchronous application of bending and torsion loads, measures the pressure applied when the structure of a test model is damaged, and calculates the bending and torsion ultimate strength. The method comprises the following steps: firstly, evaluating the proportional relation of bending and torsional loads borne by the ocean floating body, designing the proportion of four-point bending extension section distance to eccentric distance according to the proportional relation of bending and torsional loads, determining a load acting point, gradually applying loads at the load acting point until a structure model is damaged, and measuring the pressure of the load acting point; and further calculating the bending-torsion ultimate strength. According to the invention, the key problem of synchronous application of bending and torsional loads in a large ocean floating body ultimate strength model test is solved, and the formed test method can be applied to multi-purpose ocean floating body bending and torsional ultimate strength tests.

The invention relates to the technical field of industrial robot speed reducers, in particular to an RV speed reducer applied to an industrial robot, which comprises a shell, an input shaft and a rotating frame are rotatably arranged in the shell, three rotating shafts are uniformly and rotatably connected to the rotating frame in the circumferential direction, and the three rotating shafts are in transmission connection with the input shaft through planet gears. First channels and second channels are formed in the three rotating shafts in the axial direction and are close to the axes of the two eccentric wheels correspondingly, so that the mass of the rotating shafts in the axis areas of the eccentric wheels is reduced, eccentric loads generated when the eccentric wheels rotate are reduced as much as possible, and the unbalance loading force of cycloidal gears on the eccentric wheels is reduced; therefore, the situation that due to unbalance loading of a traditional RV speed reducer, a gap between a rotating groove and an eccentric wheel is increased, and parts are damaged is avoided, the service life of a rotating shaft, the eccentric wheel and a cycloidal gear is prolonged, meanwhile, the vibration amplitude during operation is reduced, and the stability of joint transmission of the industrial robot is guaranteed.

This invention relates to the field of stress detection technology, specifically to a tension, compression, and torsion loading measurement device and operating method suitable for irregularly shaped components. The tension, compression, and torsion loading measurement device for irregularly shaped components includes a tension / compression eccentric loading assembly, a torsion assembly, and a reaction force assembly. The tension / compression eccentric loading assembly includes a jack, with the jack and reaction force assembly located at opposite ends of the irregularly shaped component. The torsion assembly has two components, located at opposite ends of the irregularly shaped component, each including a torsion toothed disc, a magnetic chain, and two telescopic toothed plates. The inner ring of the torsion toothed disc has a polygonal hole, and multiple electromagnetic blocks repelling the magnetic chain are arranged circumferentially on the inner ring of the torsion toothed disc. The magnetic chain is wound around the loading positions at both ends of the irregularly shaped component, and the electromagnetic blocks are used to make the magnetic chain adhere to the irregularly shaped component. This effectively prevents the irregularly shaped component from failing at the loading position before the unloading position during the loading process. Furthermore, the length of the magnetic chain can be adjusted according to the cross-sectional outer contour length of different irregularly shaped components, making it highly adaptable.

A press machine includes: a detection unit that detects a load value during press working on a workpiece material; a storage unit that stores load values for one cycle of the press machine detected by the detection unit in association with identification information of a die attached to the press machine during detection of the load values; a calculation unit that calculates eccentric loads for predetermined press angles based on the stored load values for one cycle of the press machine and generates eccentric load distribution data for each die; a determination unit that determines an abnormality based on the eccentric loads for the predetermined press angles obtained based on the load values for one cycle of the press machine detected by the detection unit and the eccentric load distribution data corresponding to a die attached to the press machine during the detection of the load values; and a notification unit that notifies of the abnormality based on a determination result of the determination unit.