482 results about "Bending force" patented technology

The invention discloses stainless steel pipe multi-dimensional bending equipment, which belongs to the technical field of stainless steel pipe bending and comprises a rack, a moving mechanism is assembled on the rack, and a variable supporting mechanism is assembled in a mounting cylinder; by means of the arranged variable supporting mechanism, during use, a user needs to place a stainless steel pipe to be bent on the inner supporting unit in a sleeving mode, then one end of the steel pipe is fixed through the clamping mechanism, it is ensured that the position of the steel pipe is kept stable in the whole bending process, and in the bending preparation stage, an electric push rod serves as a power source; the inner supporting unit is driven to move to the preset bending position of the steel pipe along the preset track, meanwhile, the motor starts to work, the inner supporting unit is driven by the adjusting assembly to be gradually attached to and tightly abut against the inner wall of the steel pipe, uniform and effective supporting force is formed between the inner supporting unit and the inner wall of the steel pipe, and therefore in the follow-up bending process, the bending efficiency is improved. The inner supporting unit can effectively share bending force, and the sinking phenomenon caused by uneven stress on the inner side of the bent position of the steel pipe is obviously reduced.

The invention belongs to the technical field of PCB testing, and discloses a performance testing method of an AI server PCB. Comprising the following steps: acquiring power-on operation temperature data of the PCB to construct a temperature distribution image, determining hot spot region characteristics based on the temperature distribution image to obtain heating test parameters, performing heating test on the PCB based on the heating test parameters, acquiring thermal resistance of each position of a hot spot region, drawing a thermal resistance characteristic curve, and analyzing the thermal resistance characteristic curve to obtain a thermal performance grade of the PCB. The bending rate of the bending test is determined according to the basic parameters of the PCB, the bending force is adjusted in real time according to the bending rate during the test, the test is stopped when the stress or the strain reaches a threshold value, the test data is analyzed to obtain the bending resistance grade of the PCB, and the PCB is divided into different grades by combining the thermal performance grade. According to the method, the efficiency and reliability of PCB testing are remarkably improved.

The invention discloses an insertion tube and a manufacturing method thereof, an insertion part and an endoscope, and relates to the technical field of medical instruments, the insertion tube comprises an insertion body and an elastic tube, a first reinforcing layer and a second reinforcing layer are arranged in the insertion body, the second reinforcing layer is arranged outside the first reinforcing layer in a surrounding mode, and the first reinforcing layer is provided with a concave part. The first reinforcing layer and the second reinforcing layer can form double limiting and wrapping supporting on the elastic pipe, the concave shape of the concave part of the first reinforcing layer is utilized to be attached to the outer wall outline of the elastic pipe, and the outer side of the second reinforcing layer is matched for enclosing and restraining, so that the installation stability of the elastic pipe in the first channel can be greatly improved; bending moment generated by self-gravity, external force and the like of the elastic tube is effectively counteracted, the elastic tube is prevented from being bent under the action of self-gravity, external force and the like, the whole insertion tube is prevented from deforming along with bending of the elastic tube, and the form stability of the insertion tube in the cavity in the propelling process is guaranteed. And the straightness of a traction rope transmission path and the accurate conduction of a control instruction are ensured.

The invention relates to the technical field of charging piles, in particular to a universal floating docking device for a charging head of a new energy automobile charging pile, which comprises a mounting seat, a sliding plate is slidably mounted on the surface of the mounting seat, reset springs are arranged at two ends of the sliding plate, and a movable plate is arranged on one side of the sliding plate; a hollow shaft is movably connected to an inner cavity of the guide cylinder in a penetrating mode. A charging head is arranged on the outer side of the hollow seat. A threaded cylinder is fixed to one side of the surface of the hollow ball, and the charging head is fixedly connected with the hollow ball in a threaded mode. The beneficial effects are that the inner cavity of the hollow seat is movably provided with the hollow ball, the outer side of the middle part of the hollow ball is movably sleeved with the annular cover, the annular cover is fixed with the inner wall of the hollow seat, and the elastic telescopic rod is arranged between the sleeve plate and the inner wall of the hollow seat, so that when the charging wire falls under the action of gravity, the charging head can rotate and move along with the charging wire; therefore, the charging head is prevented from being broken and damaged due to the fact that the gravity of the charging wire generates bending force on the charging head.

The invention belongs to the technical field of rolling, and relates to a method for setting roll bending force and roll shifting amount for controlling the shape of a hot-rolled strip steel, which comprises the following steps of: acquiring historical production data of strip steel in actual production; the method comprises the following steps: performing abnormal value detection on strip steel historical production data by using a 3 sigma principle, removing abnormal values, and dividing the data into a training set and a test set; establishing a convexity prediction model based on Lasso regression, and training the convexity prediction model by using the training set data; testing the trained convexity prediction model based on Lasso regression by using the test set; establishing a plate shape objective function; constraint conditions of rolling variables are established according to all rack equipment in the finishing mill group and the plate shape theory; and a snake vulture optimization algorithm is adopted, the roll bending force and the roll shifting amount of each rack in the finishing mill group are searched within the constraint condition range, the plate shape target function is made to be minimum, and the roll bending force set value and the roll shifting amount set value are obtained.

The present application relates to steel cage welding processing equipment technical field, and particularly to a kind of steel cage welding equipment, comprising: welding frame, support frame of support longitudinal reinforcement, traction frame of traction longitudinal reinforcement are sequentially arranged on welding frame;Longitudinal reinforcement is installed on the installation mechanism of support frame;Longitudinal reinforcement on support frame is pushed to the pushing mechanism on traction frame;The support frame is composed of mounting frame, rotating disc;The mounting frame is fixedly connected with the welding frame;Rotating disc is rotatably installed on the mounting frame;A kind of steel cage welding equipment of the present application is replaced by setting installation mechanism, artificial longitudinal reinforcement perforation work, to reduce the problem that horizontal muscle slips and causes worker injury, reduces welding efficiency;On the one hand, longitudinal reinforcement is translated to the butt joint of traction frame along axial direction;On the other hand, longitudinal reinforcement is supported, to prevent longitudinal reinforcement from causing outward bending force on the clamping block and the block on support frame when passing through support frame.

The invention relates to the technical field of hot-rolled strips, in particular to a three-point difference dynamic adjusting method in the rolling process of hot-rolled strips, which comprises the following steps: S1, preparation before rolling and parameter initialization: roller shape matching and model parameter preloading; s2, dynamic regulation and control at the threading stage: thickness pre-compensation and temperature gradient suppression; s3, steady-state rolling control is conducted, specifically, three-point difference real-time monitoring and compensation are conducted, and thermal convexity dynamic compensation is conducted; and S4, drifting and exception handling: tail stability control and intelligent transition material insertion. According to the method, a full-process control system covering dynamic roll gap regulation and control, temperature-stress coupling compensation and intelligent decision support is constructed, and the problems that head and tail thickness fluctuation is difficult to restrain and edge thinning exceeds the standard by developing an asymmetric roll bending force distribution model and a rolling rhythm self-adaptive roll type matching strategy through traditional single-point thickness control can be effectively solved.

The invention discloses an automatic metal plate flanging and bending machine and method based on cabinet machining, and relates to the technical field of bending machines, the automatic metal plate flanging and bending machine comprises a bending machine body, an upper module and a lower module are arranged on one side of the bending machine body, and the upper module is located on the upper portion of the lower module; and a pre-pressing mechanism for pressing creases on the sheet metal part is arranged on one side of the bending machine and located on the upper portion of the upper module, and an angle deflection mechanism is arranged on one side of the bending machine. Through cooperative work of the driving motor, the gear set (the third gear, the second gear, the first gear and the half gear) and the shaft rod, it is ensured that a sheet metal part can synchronously rotate with the bottom plate during bending, deformation caused by local stress concentration is reduced, the bottom plate drives the sheet metal part to integrally rotate, and the bending efficiency is improved. The bending force is more evenly distributed on the whole sheet metal part, local excessive deformation is avoided, unnecessary upwarp or bending is reduced, and the flatness of the sheet metal part is kept.

The invention discloses a tensile bending and thermal stress combined test device and method, and belongs to the technical field of material testing, the device comprises a support frame, and the support frame is provided with a mechanical tensile device and a three-point bending device; the mechanical stretching device comprises a first sliding base, a second sliding base, a two-way threaded rod, a first clamping assembly and a second clamping assembly, and the middle of the first sliding base and the middle of the second sliding base are connected with the two-way threaded rod through threaded structures. The top ends of the first sliding base and the second sliding base are fixedly connected with a first clamping assembly and a second clamping assembly respectively, a sample is fixed between the first clamping assembly and the second clamping assembly, and the tensile force of the sample is detected by rotating a bidirectional threaded rod; the three-point bending device is arranged at the top of the supporting frame, and the bending force of the sample is detected through downward pressing of the three-point bending device. According to the invention, a stretching-bending-thermal stress combined aging test is carried out on a hot melt adhesive bonding sample under a set condition, and the performance of a hot melt adhesive layer under a long-term operation condition is tested.

The invention relates to the technical field of cables, in particular to a composite flexible cable and a use method thereof.The composite flexible cable comprises cable cores, protection assemblies are arranged on the outer walls of the multiple cable cores, joints are arranged on the outer walls of the two ends of each protection assembly, and multiple telescopic assemblies are arranged on the outer walls of the protection assemblies. The cable core is protected through the protection assembly, the cable core is conveniently connected with the connector, and the cable is conveniently connected with equipment. When the cable is bent, the telescopic assembly in the bending area of the cable is driven to be bent, relative acting force is formed through resilience force of the telescopic assembly and bending force, the bending state of the cable is weakened, and excessive bending of the cable is avoided; when the cable is dragged on the bottom surface, the dragging force of the cable drives the protection assembly to move in the direction opposite to the dragging direction and drives the protection assembly to rotate in the moving process, so that the abrasion position of the protection assembly in the dragging process is continuously changed along with rotation, the abrasion position is uniformly distributed, and the service life of the cable is prolonged.

To provide a large-diameter lens with improved aberrations.SOLUTION: An optical lens system 100 is configured so that a front group G1 and a back group G2 are sequentially arranged from an object OBJ side to an image IMG side and the distance between the front group G1 and the back group G2 is changed at focusing. The front group G1 has a positive bending force, and the back group G2 has a positive bending force and is divided into a first back group G2A and a second back group G2B before and after a diaphragm STOP. The respective lens surfaces which are the closest to the object OBJ of the front group G1, the first back group G2A, and the second back group G2B are recessed to the direction of the object OBJ side.SELECTED DRAWING: Figure 1

The embodiment of the invention discloses a parameter determination method and device, equipment, a medium and a program product, and the method comprises the steps that the current rolling pass of a strip and the current rolling parameters of a rolling mill are obtained; the current rolling pass is used for representing the current number of times of rolling the strip by the rolling mill; determining strip shape information of the strip; a target model corresponding to the current rolling pass is determined from the multiple models; different models in the plurality of models correspond to different training modes; and by means of the target model, based on the strip shape information of the strip and the current rolling parameters of the rolling mill, strip shape control parameters, used for rolling the strip, of the rolling mill are determined. Therefore, compared with the prior art that the roll bending force is adjusted manually, the strip shape control parameters of the rolling mill are determined through the model, and the accuracy of determining the strip shape control parameters of the rolling mill can be improved.

The invention relates to the technical field of bending machines, and discloses a numerical control bending machine with an automatic material supporting mechanism and a method. The numerical control bending machine comprises a machine body, a mounting plate is mounted at the top of the machine body, a supporting strip is fixedly connected to the output end of an electric push rod mounted on one side of the top of the mounting plate, and two first racks are fixedly connected to the inner side of the supporting strip; and one side of the interior of the mounting plate is movably connected with two sets of driving gears through bearings, the number of each set of driving gears is two, the outer side of the mounting plate is fixedly connected with a limiting plate, and the interior of the limiting plate is slidably connected with a second rack. The movable supporting devices are arranged at the two ends of the workpiece, so that bending force can be effectively dispersed and homogenized, the stress concentration phenomenon is reduced, the risk that materials are broken or deformed due to excessive deformation is reduced, meanwhile, unnecessary deformation of the workpiece in the bending process is avoided, and the shape stability of the workpiece in the whole bending process is ensured.

The invention discloses an automatic welding device for welding thin-wall steel pipes, and belongs to the technical field of steel pipe welding processing, the automatic welding device comprises two thin-wall steel pipe bodies and further comprises a supporting base, concentric adjusting structures are arranged at the two ends of the supporting base respectively, and a concentric limiting structure is arranged on each concentric adjusting structure; the concentric limiting structure is in sliding fit with the concentric adjusting structure; a concentric detection structure is arranged on the supporting base and faces the welding position of the two thin-wall steel pipe bodies, and an automatic welding structure for welding the two thin-wall steel pipe bodies is arranged in the middle of the supporting base. The two thin-wall steel pipes can be adjusted to be in a concentric state, and after the two thin-wall steel pipes are concentrically adjusted, stress distribution is uniform when welding seams bear external force; after the welding is finished, the stress at the welding seam can be uniformly dispersed in the whole welding area no matter whether the welding seam bears axial tension, pressure or bending force.

The invention relates to a hot continuous rolling strip steel plate shape control method and device and electronic equipment. The method comprises the steps that plate blank PDI data, equipment parameters and model parameters are read; calculating speed, temperature and thickness parameters of each finish rolling rack based on a finish rolling model; the roll bending force set value of each rack is calculated, and the roll bending force reference value, the convexity self-learning distribution value, the straightness self-learning distribution value and the operator intervention value of the SAMP model table are superposed in response to the situation that the rolling specification is not replaced, so that the roll bending force set value is generated; in response to replacement of steel types, thickness or width specifications, on the basis of superposition of non-replaced specifications, a roll bending force difference value of the SAPP model table and the SAMP model table is introduced to be multiplied by a dynamic adjustment coefficient, and a roll bending force set value is generated; a roll bending force set value is issued to an execution system at the finish rolling inlet moment; and the actual convexity and straightness of the finish rolling outlet strip steel are collected, target values are compared, and the set value of the next plate blank is corrected through self-learning. The method improves the target convexity and straightness hit rate of the hot-rolled strip steel.

The invention relates to the field of testing devices, in particular to a bending strength testing device for a fitness equipment barbell rod. The invention aims to solve the technical problems that in the bending strength test of a barbell rod, the barbell rod needs to bear large bending force, if a clamp mechanism is unstable or the clamping force is insufficient, the barbell rod may slip or break in the test process, and potential safety hazards are caused to testers and equipment. Comprising a box body, a shell is fixedly connected to the upper surface of the box body, a spacing mechanism is arranged on the inner side of the box body, two clamp mechanisms are arranged on the upper side of the spacing mechanism, pressing mechanisms are arranged on the two sides of each clamp mechanism, a rotating mechanism is arranged on the side face of the clamp mechanism on the left side, and a detection mechanism is arranged between the two clamp mechanisms. By arranging the clamp mechanism, a clamping handle rotates, four clamping wheels move oppositely to clamp and fix a barbell rod, and a locking handle moves downwards to drive a locking pin and a limiting frame to lock the position of a locking plate.

The utility model discloses a novel stretching mechanism for processing a power distribution cabinet plate, and aims to solve the problems that the plate is uneven after being stretched due to relatively large bending force in the stretching process, and the stretching efficiency and quality of the plate are further influenced. According to the technical scheme, the novel stretching mechanism for power distribution cabinet plate machining is characterized by comprising a plate machining rack, a plate containing frame and a plate stretching assembly are arranged on the plate machining rack, a plate pressing assembly is arranged at the upper end of the plate machining rack, and the plate pressing assembly comprises a first pressing assembly and a second pressing assembly; the first pressing assembly and the second pressing assembly are arranged at the two ends of the plate containing frame correspondingly. According to the novel stretching mechanism for power distribution cabinet plate processing, pressing and stretching operation can be conducted on a plate at the same time under the action of the plate pressing assembly and the plate stretching assembly, and the situation that the plate stretching effect is affected due to the fact that large bending force is generated in the plate stretching process is prevented.

The utility model discloses a deflection compensation device for a polygonal flexible bending center. The deflection compensation device comprises a plurality of groups of deflection compensation mechanisms which are arranged in parallel, each group of deflection compensation mechanism comprises a bearing beam, a tension bar and a tension bar telescopic driving device; the bearing beam is arranged between two bearing side plates of the rack; the tension bar is horizontally arranged, the two ends of the tension bar are directly or indirectly connected with the bearing beam and the upper panel of the rack respectively, and the tension bar can axially stretch out and draw back; and the tension bar telescopic driving device is used for driving the axial telescopic motion of the tension bar. According to the utility model, the horizontal load generated by bending can be directly balanced, and the bending force is balanced by using the compensation force. In addition, the device is simple in structure, low in cost, safe, reliable, convenient to adjust and obvious in effect. Furthermore, according to the requirement of an actual use scene, real-time dynamic adjustment can be realized, and a manual adjustment mode with lower cost can also be adopted. Due to the action of deflection compensation, the material cost can be reduced, and the cost is reduced.

The invention discloses a plate shape adjusting method, device and equipment for thin-specification plating high-strength steel and a medium, and belongs to the technical field of metallurgy. The method comprises the steps that the thickness and the width of the thin-specification plating high-strength steel are obtained; in the finishing period of the thin-specification plating high-strength steel, the diameter, the length and the convexity of a working roller and the diameter and the length of a supporting roller of a finishing machine are all adjusted to be corresponding target values, and a roller shape curve of the supporting roller is adjusted to be a target curve; according to the thickness and the width, the finishing elongation of the finishing machine is adjusted to be 0.9-0.1%, and the roll bending force of the finishing machine is adjusted to be 600-1000 KN; adjusting the insertion amount of a bending roller group of a withdrawal and straightening machine to be 0 during the withdrawal and straightening process of the finished thin-specification coated high-strength steel fed into the withdrawal and straightening machine; and according to the thickness and the width, the insertion amount of a straightening roll set of the withdrawal and straightening machine is adjusted to be 20-30 mm, and the withdrawal and straightening elongation is adjusted to be 0.05-0.1%. According to the method, the plate shape problems of C warping and edge waves of the thin-specification plating high-strength steel can be greatly reduced.

To suppress vibration of ceiling materials without applying bending force to a wall body and without using braces.SOLUTION: An anti-vibration structure includes a wall body 30 divided into an upper wall portion 32 fixed to an upper slab (slab 12A) and a lower wall portion 34 fixed to a lower slab (lower slab 12B), a steel frame 40 fixed to the structural body (beam 14) of a building 10 and pin-joined to the upper wall portion 32 to form a truss together with the upper wall portion 32, and a ceiling material 50 suspended from the upper slab and positioned opposite the steel frame 40.SELECTED DRAWING: Figure 1

The invention discloses a critical parameter prediction method for a vertical cantilever fluid conveying pipe comprising a water injection pump and a Y-shaped nozzle, and relates to the field of fluid conveying pipe critical parameter calculation. The prediction method is based on an Euler-Bernoulli beam model and a momentum theorem, bending force, centrifugal force, Coriolis force, inertia force, gravity and additional force generated by an elbow are comprehensively considered, and an oscillatory differential equation of the fluid conveying pipe is established. The method comprises the following steps: performing dimensionless processing on an oscillatory differential equation by introducing dimensionless parameters, deducing a characteristic equation, a characteristic function and a characteristic value under a cantilever boundary condition, converting a partial differential equation into an ordinary differential equation set, and performing matrix solution; and finally, accurate prediction values of the critical flow velocity and the critical frequency can be obtained. The method can effectively reflect the influence rule of the nozzle and the concentrated mass on the vibration characteristics of the fluid conveying pipe, and realizes the accurate prediction of the critical parameters of the vertical cantilever containing the concentrated mass belt Y-shaped nozzle fluid conveying pipe.

The embodiment of the utility model provides a conveying system bend adjusting pipe testing device, and belongs to the technical field of medical instruments. The conveying system bend adjusting pipe testing device comprises a base, a positioning unit, an angle measuring unit and an adjusting unit. The positioning unit, the angle measuring unit and the adjusting unit are arranged on the base; the positioning unit is used for positioning the tested bend adjusting pipe, and the angle measuring unit is used for measuring the bending angle of the adjustable bending part of the tested bend adjusting pipe; the adjusting unit is connected with the adjustable bending part of the tested adjustable bending pipe through the traction piece, and the adjusting unit is used for driving the traction piece to move so as to bend the adjustable bending part; and a force measuring assembly is arranged between the adjusting unit and the traction piece and is used for acquiring tension data of the traction piece in the bending process of the adjustable bending part of the tested bending adjusting pipe. According to the conveying system bend adjusting pipe testing device, the relation between the bend adjusting force and the bend adjusting angle of the tested bend adjusting pipe in the bend adjusting process can be represented.

The invention discloses anti-torsion measuring equipment for multi-directional stress of a sectional material. The anti-torsion measuring equipment comprises the sectional material and measuring equipment for applying torsion to the sectional material, the measuring device comprises: a support frame; the movable plate is mounted on the supporting frame, and a lifting mechanism is arranged between the movable plate and the supporting frame; the torque applying system is arranged on the moving plate, comprises a motor, a belt pulley transmission structure, a speed reducer, a coupler, a rotating shaft, a universal joint I and a three-jaw chuck I, and is used for applying torque to the top end of the profile; the invention belongs to the technical field of profile detection, aims to solve the problem that only pure torque or single-direction bending force can be tested in the prior art, and achieves the technical effect that composite loading of profile axial torque and spatial omnidirectional lateral force is realized through circumferential rotation driven by a planetary gear and pitching adjustment of an arc-shaped rod-sliding block.

The invention relates to the technical field of aviation conduit fatigue tests, and provides an aviation conduit rotation bending test flexural disc, which is provided with a self-aligning bearing, a basic disc and a bearing seat, a joint at one end of an aviation conduit is inserted into an inner hole of the self-aligning bearing, and a joint at the other end of the aviation conduit is mounted on an aviation conduit rotation bending fatigue test mounting device. The aviation conduit rotation bending fatigue test installation device is installed on a workbench, a basic disc is fixedly installed at one end of a rotating shaft through an installation hole, the rotating shaft is connected with a synchronous belt, the synchronous belt is connected with a motor, the motor is arranged in a headstock, the headstock is installed on the workbench, and a bearing seat is assembled with the outer diameter of a self-aligning bearing. The bearing seat is arranged on one side of the basic disc in a position-adjustable mode and can move relative to the basic disc to generate eccentricity during position adjustment, so that the aviation conduit is subjected to bending force, and the reasonability, reliability and safety of the flexure disc structure are improved.

The invention relates to a rapid and intelligent stamping method for hardware products, belongs to the technical field of intelligent stamping of the hardware products, solves the problem of resilience through the combined action of temperature gradient control and partition mechanical compensation, is provided with a heating and cooling unit at a bending station, and is pre-pressed through a low-friction coating pressure plate and a high-strength spring at an outer tension area, so that the metal products are rapidly and intelligently stamped. In the inner side pressed area, a stepped material ejecting block is designed to be matched with a multi-rigidity spring set, so that partition elastic yielding is achieved, redundant materials are absorbed, wrinkling is restrained, a wedge-shaped ejector rod and a wedge-shaped floating sliding block are designed in a transition area, and springback is counteracted through material ejecting and pressing and active pre-compression in the middle and later period of bending; besides, the bending force curve is monitored in real time through intelligent closed-loop control, theoretical value deviation is compared, temperature control parameters and the bending speed are adjusted in a self-adaptive mode till the springback value is stabilized within the error range, and the problems of how to synchronously restrain bending defects and accurately control the springback value in the continuous stamping process in the prior art are solved.

The invention provides a plate shape control and plate thickness precision collaborative optimization method in the rolling process of a cold-rolling mill, which relates to the technical field of cold-rolling mill control, and comprises the following steps: acquiring contact parameters between a rolling working roll and a supporting roll, determining a contact stress distribution state, and acquiring the bending deformation of the working roll; constructing a coupling mapping relation between plate shape moment distribution and stress distribution; a compensation coefficient is adaptively adjusted according to the rolling state, and a dynamic collaborative optimization objective function is established; and working roll bending force and supporting roll displacement meeting the target are obtained through calculation, and rolling parameters are adjusted in real time. According to the method, cooperative control over the plate shape and the plate thickness is achieved, and the quality of cold-rolled products is improved.

The invention relates to the technical field of mechanical fatigue testing, in particular to rotary bending fatigue testing equipment for a rotor shaft, which comprises a base, a rotary driving module, a loading module, a dynamic balance module, a crack monitoring module and an adjusting module, and is characterized in that the rotary driving module drives the rotor shaft to rotate through a belt transmission assembly; the loading module adopts a lever type force reversing mechanism to realize accurate bending moment loading; the dynamic balance module automatically counteracts eccentric vibration through a free disc and a symmetrical bearing seat; the crack monitoring module captures vibration abnormity and internal crack initiation in real time; and the adjusting module is automatically adapted to different shaft lengths by driving a threaded screw rod through a motor. Anti-slip lines are arranged on the inner sides of the clamps at the two ends to ensure stable clamping; the levers are symmetrically arranged and matched with the locking nuts, so that switching of translation force or bending force applied by the levers is facilitated, the equipment realizes high-precision and full-period fatigue test, and the device is suitable for reliability evaluation of key rotor parts of aero-engines and steam turbines.

The utility model relates to the technical field of steel bar wire machining, and discloses a portable steel bar bending device which comprises a support, a hook reference part and a bending force application part. Two groups of hook reference parts are arranged at one end of the bracket, are parallel to each other and are arranged at intervals, and the two groups of hook reference parts are used for being hooked on reference steel bars and are rotatably arranged around the reference steel bars; the bending force application part is located in the area between the two sets of hook reference parts and arranged on the support, and the bending force application part is used for applying force to the target reinforcing steel bar when rotating around the reference reinforcing steel bar so that the target reinforcing steel bar can be bent at the preset position. The whole structure is simple, portable and capable of being hooked on a longitudinal bar anytime and anywhere and then directly bending a constructional steel bar, the accuracy and the matching degree of a rectangle formed by the steel bar can be higher, the structural requirement is met, and the construction quality and the construction efficiency are improved.

The invention discloses a bending device for aluminum product machining, and relates to the technical field of aluminum product bending equipment, the bending device comprises a supporting seat and a plurality of conveying guide wheel sets used for conveying strip aluminum plates, the conveying guide wheel sets are distributed along the surface of the supporting seat at equal intervals, and the bending device further comprises a first positioning wheel, a second positioning wheel, a first bending wheel set and a second bending wheel set; the first positioning wheel and the second positioning wheel are sequentially distributed in the distribution direction of the conveying guide wheel set, and the second positioning wheel is provided with a rotation driving mechanism used for applying bending force to the long-strip aluminum plate. The first bending wheel set is connected with the driving end of the rotary driving mechanism in a matched mode, and the second bending wheel set is connected with the first bending wheel set in a matched mode. According to the aluminum frame bending device, aluminum frame bending machining is conducted through four-point positioning of the first positioning wheel, the second positioning wheel, the first bending wheel set and the second bending wheel set, meanwhile, multi-point-position bending is generated, rapid bending forming is achieved, bending one by one for different positions is not needed, and the bending machining efficiency is improved.

The invention discloses a metal part physical performance detection device, and relates to the technical field of metal part detection, the metal part physical performance detection device comprises a workbench, the top surface of the workbench is slidably provided with two groups of moving assemblies, the opposite surfaces of the moving assemblies are fixedly provided with a group of bending assemblies, and the two groups of bending assemblies are internally slidably provided with a group of clamping assemblies; the two bending assemblies are jointly provided with a hydraulic assembly and a liquid guide assembly, a transfer assembly is installed on the top face of the workbench, a detection assembly is fixedly installed at the rear end of the transfer assembly, and a fixed point assembly is fixedly installed at the front end of the transfer assembly. According to the device, hydraulic oil can be cyclically switched among different cavities, so that the clamping assembly is driven to move up and down along the arc-shaped guide rail, the strip-shaped metal part is subjected to controllable bending force, meanwhile, the bending test point can be flexibly adjusted through cooperation of the movable support and the fixed-point support, and diversity and adaptability of experimental working conditions are ensured.