792results about How to "Achieve bending" patented technology

The invention discloses a multi-field coupled environment simulating and online monitoring / observing system. The system comprises: a main body test box provided with a quartz observing window and an infrared window; a mechanical loading module comprising two coaxially arranged mechanical loading shafts and respectively connected with the main shafts of a universal testing machine and a sample clamping device; a multi-field service environment module arranged outside the main body test box and comprising an infrared laser rapid heating device, an X-ray radiation device, a corrosion gas box and a cooling system and respectively used for realizing heating, irradiating, corroding and cooling environments; and a damage online monitoring / observing module comprising a surface / interface strain real-time observation system, an in-situ fracture behavior observation system, a damage signal collecting system and an infrared thermodetector which are arranged outside the main body test box, and damage signal detectors arranged at the upper end and the lower end of a tested sample, and wherein devices contained in the damage online monitoring / observing module are respectively used for real-time capturing of strain information, in-situ fracture image information, damage information and temperature information, and synchronously run through a cynchronous control system.

The invention provides a five-degree-of-freedom artificial hand mechanism, relates to an artificial hand mechanism and aims to solve the problems that the conventional artificial hand has single degree of freedom and cannot realize independent movement of each finger. Five drivers, five reducers and a palm circuit board are all integrated in a cavity of a palm; a thumb driver and a thumb reducer are arranged along a width direction of the palm, the four drivers except the thumb driver and the four reducers except the thumb reducer are arranged along a length direction of the palm, and a wrist and the palm are rotatably connected relatively; each driver is in transmission connection with the corresponding reducer, and the reducer is in transmission connection with a corresponding transmission mechanism; and a rotating part of each potentiometer is connected with the corresponding transmission mechanism, and the transmission mechanism is supported on a corresponding substrate. The five-degree-of-freedom artificial hand mechanism has five degree-of-freedom, and improves the flexibility of the artificial hand; and due to the simple and reliable transmission, relative motion of each finger is realized, and adaptive grasping of objects of different shapes and sizes is also realized.

The invention relates to a bending self-locking pneumatic under-actuated robot finger device, and belongs to the technical field of humanoid robot hands. The device comprises a first finger section, a second finger section, an under-actuated joint, a motor, a transmission mechanism, a locking mechanism and a first spring piece. The transmission mechanism comprises a tendon rope and a winding reel. The locking mechanism comprises a ratchet wheel oscillating bar, a pawl, a rotating shaft and a second spring piece. The device achieves a self-adaptive under-actuated effect by adopting a pneumatic mode; one-way bending is achieved by adopting a ratchet wheel and the pawl, and an object is prevented from getting loose when an counteraction face is withdrawn or vibration interference occurs; stable grasping force applied to the object by the second finger section is generated through the deformation of the spring pieces, and thus form sealing and force sealing grasping is achieved; the restraint to the ratchet wheel by the pawl is relieved through the motor, and thus the object is released; the device is simple in structure, small in size, low in weight, low in manufacturing and maintaining cost and similar to the fingers of the human hands.

The invention relates to a mobile terminal with flexible screens. The mobile terminal includes a first main body, a second main body and a flexible screen assembly; the first main body and the second main body are arrange at intervals; the flexible screen assembly includes metal sheets which are overlapped with one another sequentially, a flexible display screen and a flexible touch screen; two ends of each metal sheet are fixedly connected with the first main body and the second main body respectively; and each metal sheet, the flexible display screen and the flexible touch screen respectively comprise a bending zone, and the bending zones can be bent or unfolded, so that the first main body and the second main body can have opening and closing angles ranging from 0 degree to 180 degrees. According to the mobile terminal with the flexible screens provided by the invention, when the bending zones are bent, stacking of wrinkles in bending can be prevented since the bending deformation quantity of the bending zones is constantly located between the interval of the first main body and the second main body; and the mobile terminal can be bent by means of the bending features of the metal sheets, the flexible display screen and the flexible touch screen, and therefore, a rotation shaft or other supports are not required to be adopted additionally, and therefore, the mobile terminal with the flexible screens is compact and simple in structure.

The invention discloses a device for hand rehabilitation training with the function of wrist rehabilitation training, which effectively solves the problems in the prior art that the training device is bulky and not easy to carry, and has the advantages of simple structure, easy operation and high functionality. As follows: the device includes at least one two-joint finger training mechanism and a wrist training mechanism; wherein, each two-joint finger training mechanism includes a power drive source fixed by the joint bracket of the finger near the end of the finger, and the push rod of the power drive source is connected to the finger near the end of the finger. The joint driving part is connected to control the rear joint of the human finger; the finger proximal end joint support, the finger proximal finger end joint driving part is fixed by the finger proximal finger end joint support and the finger proximal finger end joint support defines the position of the finger proximal finger end joint driving part The moving path is the far fingertip joint support of the finger, and the multi-link mechanism is connected with the finger far fingertip joint support.

The invention provides a device for realizing spatial three-dimensional variable curvature bending of a pipe. The device comprises a pipe, roller groups, a bending unit, a guiding unit, a rear push rod and a fixed rack, wherein each roller is connected with a connecting rod by a bearing; the four rollers surround the circumference direction of the pipe; the axes of the rollers are vertical pairwise and are arranged in a cross manner; the two connecting rods connected with a pair of rollers with longitudinal axes are fixed on two parallel beams respectively; the two connecting rods connected with a pair of rollers with transverse axes are parallel to each other and are vertically fixed on the beams respectively; the guiding unit comprises at least three roller groups; the two beams of each roller group are vertically fixed on two side wall plates of the fixed rack; two columns of the bending unit are vertically fixed on a baseplate respectively; the two beams of the roller groups are vertically fixed with the two columns; a vertical motor 11 is connected at the bottom of the baseplate; and a horizontal motor 10 is connected at one end of the baseplate. The device has simple structure, low cost and low energy consumption, can prepare various spatial variable curvature bending pipes and effectively reduce the defects such as wrinkling and fracture.

A step type variable speed scanning method for accuracy control of laser bend forming belongs to the technical field of plastic forming. A laser coating material is coated on the scanning area of a surface to be scanned, a sheet material to be detected is clamped on one side, the scanning speed of the scanning area is determined by the diagram method to generate the step type variable speed scanning scheme corresponding to the scanning area, and finally the sheet material to be detected is scanned and processed according to the step type variable speed scanning scheme in a laser numerical control manner. The measure and check after processing are performed after the sheet material is cooled naturally. The method of the invention can effectively reduce the phenomenon of border effect, enhance the forming accuracy of the sheet material, thereby realizing the different energy output of the different heating area to balance the geometric constraint of the sheet material and improve the border effect.

The invention discloses a human simulation dexterous hand based on shape memory alloy (SMA) flexible body intelligent digital composite structures. The human simulation dexterous hand is composed of the five different sizes of SMA flexible intelligent digital composite structures and flexible wrapping materials. The size of each SMA-flexible body intelligent digital composite structure corresponds to one finger and a metacarpal bone of the finger of a human hand. Each SMA flexible body intelligent composite structure is composed of two sections, one section is of a rigid structure simulating a metacarpal bone structure of the human hand, and the other section is of a flexible deformation structure simulating the finger part of the human hand. The SMA flexible body intelligent digital composite structures are composed of 3D metacarpal bones, intelligent digital driving skeletons, elastic sheets and the flexible wrapping materials. The SMA flexible body intelligent digital composite structures are composed of the intelligent digital driving skeletons, the sheets and the flexible wrapping materials, so that self-feedback control and digital bending motion can be realized. The dexterous hand has the advantages that the simulation degree of shapes and motion is high, cost is low, safety and compatibility are good, and controllability is high.

The invention provides a display device and a bending device making same; the bending device can bend a part of the display device without damaging the display device, and uses a pedestal, a rack and a bending portion so as to bend partial the display device; the pedestal comprises a mounting surface used for configuring the display device; the rack comprises a clamp portion used for clamping a part, connected with the bended portion of the display device, of the display device; the bending portion is used for bending and pressurizing the bended portion.

The invention discloses a 3D free bending forming technology optimization method for complex metal components. The method includes the steps that quantitative relations between geometrical shape parameters of a straight section, a transition section and a bent section and movement velocity u of a spherical bearing within the X / Y plane, pipe Z-axis feed-in velocity v, movement time t and a distance A between the center of a bending mold and the front end of a guiding mechanism are established; a finite element method is adopted for establishing a 3D bending model, and a correction factor k is introduced into the quantitative relations; the quantitative relations with the introduced correction factor k are adopted as bending technology parameters, bent pipe finite element repeated iterative computation is started, computation results are imported into geometry software to be processed, and the dimension difference between the computation results and the established 3D bending model is obtained through comparison; based on an established dimension error criterion, whether the correction factor k is modified, and iteration is performed again is determined; when the error is smaller than a set value, iteration is ended; final technology parameters are transmitted to equipment to execute actual bending forming.

The invention relates to the technical field of machining equipment, in particular to a flexible bending center. The flexible bending center comprises a positioning machine table, a feeding device penetrating the positioning machine table to carry out feeding and a bending device used for machining a material. The positioning machine table comprises two emptying tables and a positioning mechanism arranged on the emptying tables. The feeding device comprises a clamping rotating mechanism, a pushing mechanism arranged on the clamping rotating mechanism and a longitudinal moving drive mechanism used for driving the clamping rotating mechanism to move, and the bending device comprises a bending machine table, a pressing mechanism arranged on the bending machine table and a turnover mechanism used for bending the material. The center is reasonable in structural design and sensitive in action, automatic feeding and bending of boards and changes of board bending positions can be achieved, the bending work efficiency is improved, board positioning is accurate, and quality of bending products is ensured.

The invention discloses an exoskeleton type finger rehabilitation training device driven by an active driver and a passive driver together. The exoskeleton type finger rehabilitation training device driven by the active driver and the passive driver together comprises a force feedback driver and a finger exoskeleton mechanism, wherein the force feedback driver comprises a shell body, a motor and a magnetorheological fluid damper, a rotary wheel is connected between the motor and the magnetorheological fluid damper through a coupler, a hauling cable is wound on the rotary wheel, the finger exoskeleton mechanism comprises a support, a linear guide rail and a finger fixing structure, a sliding block is arranged on the linear guide rail and is connected with the hauling cable, a first connecting block is fixed on the sliding block, an L-shaped crank is connected at the lower end of the first connecting block in a rotary mode, a middle finger knuckle block is connected at the other end of the crank in a rotary mode, and the other end of the middle finger knuckle block is connected on the finger fixing structure through a second connecting block. Due to the fact that the finger exoskeleton mechanism is a slider-crank mechanism similar to a plane four-bar mechanism, a given law of movement can be achieved, and the exoskeleton type finger rehabilitation training device driven by the active driver and the passive driver together is light in movement and high in transmission efficiency.

The invention provides an integrated active power supply flexible pressure sensor. The sensor comprises a sensing unit of a sandwich structure and a power unit which is arranged with the sensing unitin a cascading mode and is used for providing power for the sensing unit. The power unit is a zinc-air cell of the sandwich structure, and comprises an anode, a cathode and a gel electrolyte, whereinthe anode and the cathode are oppositely arranged, and the gel electrolyte is arranged between the cathode and the anode. The anode is a flexible zinc-containing electrode, and the cathode is a flexible air electrode. The sensing unit comprises a negative electrode, a positive electrode and conductive fiber paper or conductive woven cloth, wherein the negative electrode and the positive electrodeare arranged oppositely, and the conductive fiber paper or the conductive woven cloth are arranged between the positive electrode and the negative electrode. The sensing unit takes the flexible zinc-containing electrode of the power unit as the negative electrode. The integrated active power supply flexible pressure sensor realizes an integrated design of the power unit and the sensing unit, and can be applied to practical applications such as human physical health monitoring and the like.

The invention discloses a bending punching die, which relates to a punching die for machinery processing. The punching ide comprises an upper die base, an upper clamping plate, a lower template and a lower die base, wherein the upper die base is connected with the upper clamping plate; the lower template is connected with the lower die base; the lower template is provided with a groove; the upper clamping plate is provided with a bending punch; the bending punch is provided with a V-shaped punching end which is matched with the groove of the lower template; and the top end of the bending punch is provided with a screw hole. Due to the adoption of the technical scheme, the V-shaped punch of the bending punch is matched with the groove of the lower template, bending of machine elements is realized through one-time punching, and the bending degrees of the machine elements are kept consistent.

The invention aims to provide a mechanism for simulating the jumping of frog rear legs. The mechanism comprises a body mechanism, a thigh mechanism, a shank mechanism and a sole mechanism, wherein the body mechanism comprises a left side body supporting plate and a right side body supporting plate; the thigh mechanism comprises a left side thigh supporting plate, a right side thigh supporting plate and a thigh fixing plate; the shank mechanism comprises a shank rotating mechanism, a shank reset mechanism and a shank telescopic mechanism; the sole mechanism comprises two sole seats. According to the mechanism provided by the invention, a four-connecting rod mechanism is formed in a way that connecting rods are replaced by ropes, the design is carried out by utilizing a connecting rod principle, the simulation degree of the frog rear legs is increased, and high simulation performance is realized; the flexibility of legs is enhanced, and the effects of jumping and buffering are increased.

The invention relates to a device and a method for testing the structural fatigue of an H-shaped vertical shaft wind turbine blade. The device comprises a support base component, a distribution beam, a loading hoop, a support connecting rod and an eccentric motor, wherein the distribution beam, the loading hoop and the support connecting rod are connected together by using bolts so as to form a whole load distribution system, so that the fatigue load which acts in an upper and lower reciprocation manner can be effectively conducted. When the device is used for experiment, the fatigue bending moment distribution of the blade under various working conditions can be simulated by adjusting the length L of the distribution beam and the position B of the loading hoop, and the fatigue stress state of the blade in axial torsion and multiple attack angles can be simulated by adjusting the structural modes of the support base component and the loading hoop; the strain distribution of the blade under the fatigue loaded condition can be measured, and furthermore, the fatigue structural property of the blade can be evaluated; by only exerting one external fatigue load to the device, combined fatigue loading modes such as bending, torsion and multiple attack angles of the blade can be achieved, and the device is simple and convenient to operate, accurate and reliable in result and relatively high in universality.

The invention discloses an endoscopic surgery instrument outer sheath based on a soft continuum mechanism, and belongs to the technical field of minimally invasive surgery instruments. The endoscopic surgery instrument outer sheath comprises a plurality of flexible units, each soft unit comprises a soft air with the high ratio of expansion and contraction, a rigid connecting piece, a steel wire soft shaft, a nickel-titanium wire, a disc, a surgical instrument channel, a pretightening force support, a pretightening force air cylinder and a fastening screw. Air pressure in the air bags is controlled to change the lengths of the air bags, and space bending of the units is achieved. Under any bent state, the pretightening force air cylinders apply pretightening force to the three nickel-titanium wires, the bending rigidity of the units is controlled, the effect of changing the rigidity is achieved, and the function of passive protection is achieved. The endoscopic surgery instrument outer sheath is used as an outer sheath unit of an endoscopic surgery instrument entering a human body, the outer sheath can be bent along with the cavity of the human body, the tissue of an inner wall is prevented from being oppressed, the rigidity is changed after the endoscopic surgery instrument outer sheath reaches the position of a disease, mechanical support is provided for the surgical instrument, the tissue can be prevented from being over-pressed to be hurt through the passive protection characteristic of the outer sheath when the surgical operation is carried out, and therefore the safety and effectiveness of surgery are improved.

The invention discloses a flexible self-support graphene conductive thin film with a microstructure pattern on the surface and a preparation method of the flexible self-support graphene conductive thin film. The preparation method comprises the following steps of filling a cellulose nitrate solution in a female template with the microstructure patter on the surface, drying and stripping the female template to obtain a cellulose nitrate thin film with a reverse microstructure as a substrate; carrying out plasma surface processing on the substrate; filling a graphene oxide solution in the substrate and drying graphene oxide solution to form a film; placing the obtained graphene oxide thin film in hydroiodic acid aqueous solution for heating and reduction; and removing the cellulose nitrate thin film to obtain the flexible self-support graphene conductive thin film with the same microstructure pattern as the female template. The method has the advantages of simplicity in preparation, convenience in operation, simplicity in device and process requirements, cheap raw material and low cost, and industrial production at a large scale can be achieved. The prepared self-support graphene film is high in toughness and high in conductivity, the microstructure pattern on the surface is adjustable, and the self-support graphene film is expected to be used for aspects such as flexible electronics, flexible display, a wearable sensing device and an energy storage device.

The invention discloses a method for preparing a flexible self-supporting graphene film doped with metal nanoparticles. Firstly, the graphene and the metal salt solution are mixed, and the mixed solution is titrated on a solid substrate and dried to form a film. The obtained film is put into ascorbic acid aqueous solution and heated for reduction to obtain a flexible self-supporting graphene film doped with metal nanoparticles inside. The graphene oxide aqueous solution was firstly titrated on a solid substrate and dried to form a film. Further, the metal salt solution is titrated on the graphene oxide film, and after drying, it is placed in an aqueous solution of ascorbic acid for heating and reduction to obtain a flexible self-supporting graphene film doped with metal nanoparticles on the surface. The method has simple preparation, few reaction steps, convenient operation, simple equipment and process requirements, cheap raw materials, and low cost, and can realize the preparation of graphene films doped with metal nanoparticles inside and graphene films doped with metal nanoparticles on the surface .

The present invention belongs to the field of machinery manufacture technology, in particular, it relates to a laser impacted sheet formation method base on liquid crystal mask and its equipment. It is applicable to precision formation of metal sheet (whose thickness is 50 micrometers-4 mm). The invented equipment includes successively-connected laser generator control device, laser generator, beam-expanding system, liquid crystal display screen and display screen control device, focusing system, workpiece clamping apparatus system and digital control system connected with laser generator control device. Display screen control device and working table control device.

The invention relates to a multi-degree-of-freedom rigidity-adjustable pneumatic flexible operation motion arm comprising large pedestals on upper and lower ends. a central nylon wire traverses a plurality of slices in the center and is fixed on the large pedestals on two ends to form a driving framework, more than three small pneumatic arms are symmetrically distributed and are adhesively fixed on the periphery of the driving framework in the direction being parallel to the central nylon wire, the small pneumatic arms are surrounded by a composite film, annular nylon fibers which can carry out rigidity adjustment through adjusting vacuum are pasted on the outer wall of the composite film from top to bottom, a sealing clamp is fixed on the outer wall of the composite film which surrounds the outer side of the large pedestals, a packaging jacket packaged by a sealing band is fixed on the outer side of the sealing clamp, an enclosed cavity is formed between the packaging jacket and the outer wall of the composite film, the enclosed cavity is provided with a vacuum-pumping port, each small pneumatic arm is a sealing cavity formed in a way that a composite film is wound on a small top pedestal and a small bottom pedestal, and each sealing cavity is provided with a driving gas ingate. The multi-degree-of-freedom rigidity-adjustable pneumatic flexible operation motion arm is advantaged by relatively-large complex deformation and rigidity maintenance and the like.

The invention provides a sweat monitoring and sensing system, a patch and a preparation method of the patch, wherein the preparation method comprises the following steps: preparing a flexible extensible substrate; manufacturing hydrophilic tapping silicone sponge; manufacturing multiple sensing chips; transferring each sensing chip onto the flexible extensible substrate, and arranging the hydrophilic tapping silicone sponge at the top of each sensing chip. The patch has a simple structure, is convenient to prepare and is conducive to meeting monitoring requirements.

The invention discloses a metal plate bending machine which comprises an operating platform. The operating platform is vertically provided with two side plates which are in parallel with a certain distance and are characterized in that: the front part of each side plate is provided with a guiding device, the middle part of the side plate is respectively provided with a feeding device and a dadoing device; and the rear part of the side plate is provided with a bending device. In the invention, two rotatable bending knives controlled by stepping motors are adopted to realize the functions of bending and cutting; and the dadoing device is installed before a metal plate is bent, and a rack mark is pre-drawn, thereby the bending precision is improved. The metal plate bending machine provided by the invention has the advantages of full automation, reasonable structure, anti-vibration, wide bending angle range, small size, integration of bending and cutting and the like.

The invention discloses a steel pipe heating space bending method and a heating space pipe bending machine. A steel pipe clamping device is pushed to move horizontally by using a hydraulic propelling cylinder, wherein one end of the steel pipe is clamped by a steel pipe propelling chuck; the other end of the steel pipe is clamped by a rocker arm chuck; a steel pipe bent part is heated by using a heating device; temperature of the steel pipe bent part is measured by using a temperature control system; in comparison with a set temperature value of the steel pipe bent part corresponding to a set bent pipe semi-diameter, when the temperature of the steel pipe bent part reaches the set temperature value, the hydraulic propelling cylinder is adjusted in time and used for pushing a steel pipe and / or a rocker arm to bend along a rocker arm rotation shaft according to a set rocker arm semi-diameter; a first bent head is bent by automatically stopping after reaching a set bent angle; the steel pipe is rotated by a steel pipe rotating device; the bending step of the first bent head is repeated after reaching a set rotation angle, so that the bending of the rest of bent heads is achieved; and finally, the precise space bending of the steel pipe is achieved.

The invention discloses a full-automatic resistor bending machine and a resistor bending method. The full-automatic resistor bending machine comprises a feed mechanism, a pressing mechanism, cutter mechanisms, a bending mechanism and a motor. Resistors are conveyed to a preparation table by the feed mechanism; the pressing mechanism is arranged above the preparation table and compresses the resistors on a workbench from the preparation table; the cutter mechanisms are arranged on two sides of the workbench and cut off redundant pins of the resistors; pins of the resistors are bent by the bending mechanism; the feed mechanism, the pressing mechanism, the cutter mechanisms and the bending mechanism are powered by the motor. The full-automatic resistor bending machine and the resistor bending method have the advantages that the pins of the resistors can be automatically and quickly cut off and bent by the full-automatic resistor bending machine, labor is saved, and the production efficiency is improved; the multiple mechanisms are driven to act by the single motor via chains, so that the cost is saved, actions of the various mechanisms are coordinated during production, the production takt can be changed by means of adjusting the rotation speed of the motor, and the production efficiency is improved; action sequences and action moments of the various mechanisms are controlled by the aid of cams, and accordingly can be controlled precisely.

The invention discloses a full-automatic numerical control bending machine and belongs to the field of engineering machines. The full-automatic numerical control bending machine mainly comprises a rack, wherein a conveying device, a bending device and a discharging device which are mutually matched are arranged at the bottom part of the rack; the conveying device comprises a conveying platform, a conveying air cylinder is arranged on the conveying platform and the conveying air cylinder is connected with a conveying push plate; the bending device comprises an upper working platform, a lower working platform and a pressure cylinder, the upper working platform is connected with a piston of the pressure cylinder, the lower working platform is correspondingly connected with the conveying platform, the pressure cylinder and an upper die are arranged on the upper working platform, and a lower die matched with the upper die is arranged on the lower working platform; the discharging device comprises a discharging air cylinder and a discharging slide way. The full-automatic numerical control bending machine has the advantages that the structure is simple, the efficiency is high, the energy consumption is low, the automatic charging, positioning, bending and discharging of parts are realized, the labor intensity of workers and the production cost are reduced, and safety accidents are prevented from occurring. The full-automatic numerical control bending machine is mainly used for bending parts.