318 results about "Shaped beam" patented technology

The invention discloses a composite material T-shaped beam forming method in the technical field of aviation, a forming die, a laying die and a bottom face forming die which are arranged in a split mode and can be combined are adopted, forming is conducted through a secondary hot-pressing curing process, and the method comprises the following steps that S1, preforming and R corner prefabricating are conducted, the independently-prefabricated prepreg core material is positioned in a T-shaped beam R-angle area formed after the prepreg core material and the T-shaped beam R-angle area are oppositely combined; and S2, first-time mold closing and pre-curing are carried out, specifically, the laying mold and the forming mold are oppositely closed, lateral auxiliary positioning is carried out through the bottom face forming mold, locking and fixing are carried out through a positioning pin and a clamping piece, and first-time hot-pressing curing is carried out on a combined body obtained after mold closing. According to the method, the independently prefabricated core material which is subjected to heat-sealing, pressing and pre-curing is filled in the R-angle area, and a secondary hot-pressing process of pre-curing and final curing is matched, so that sufficient pressure transmission and tight laying of the R-angle area are ensured, the defects of layering, bridging and the like are effectively avoided, and the percent of pass of nondestructive testing of products is remarkably improved.

An antenna system steerable in any direction and methods of use are provided. In an embodiment, the antenna system comprises a substantially ellipsoid-shaped shell body and a plurality of cells coupled to the body, wherein each cell comprises a conductive material. In an embodiment, the shell body comprises a metasurface. In an embodiment, the antenna system further includes a plurality of switches coupled to the plurality of cells, wherein each switch is configured to change its coupled cell between reflective, transmissive, and absorptive states. The antenna system further includes a feed radiator located at or around the center of the shell body; a radio coupled to the feed; and a processor coupled to the feed, radio, and the plurality of switches, wherein the processor is configured to produce a shaped beam by controlling a subset of the plurality of switches.

The invention provides a friction stir welding aluminum alloy I-shaped beam pressure limp bearing capacity design method which comprises the following steps: acquiring key parameters of a friction stir welding aluminum alloy I-shaped beam test piece, including section size information, structural design parameters, material mechanical property indexes, welding seam parameters and geometric initial defects; calculating dimensionless parameters based on the key parameters; calculating a pressure limp bearing capacity theoretical value of the transverse stiffening rib-free aluminum alloy I-shaped beam when the transverse stiffening rib-free aluminum alloy I-shaped beam is subjected to concentrated load in the midspan according to European specifications or an American aluminum coordination design manual; real pressure limp bearing capacity data of the stirring friction welding aluminum alloy I-shaped beam are obtained through experimental testing and finite element simulation, and a correction coefficient is obtained through regression analysis fitting based on the real pressure limp bearing capacity data and dimensionless parameters; and the correction coefficient is multiplied by a standard theoretical value, or an American standard formula based on least square method regression correction is adopted, and the pressure limp bearing capacity design value of the friction stir welding aluminum alloy I-shaped beam is obtained.

The invention belongs to the technical field of T-shaped beam top plate reinforcement cage forming, and discloses a T-shaped beam top plate reinforcement cage welding device which comprises a rack, a long rib positioning mechanism, a stepping mechanism, a mesh moving mechanism and a welding mechanism. The supporting part is used for supporting all the full-length ribs; the stepping mechanism is movably arranged on the rack in the second direction, and the stepping mechanism can clamp the full-length rib supported by the supporting part to move in the second direction; the mesh moving mechanism is movably arranged on the rack in the second direction, and the mesh moving mechanism is used for moving the single reinforcing mesh located on the full-length ribs; the welding mechanism is arranged on the rack and used for welding the full-length ribs and the single reinforcing mesh moved in place by the mesh moving mechanism. The T-shaped beam top plate reinforcement cage can be automatically formed, and the production efficiency of the T-shaped beam top plate reinforcement cage is improved.

The present application relates to the field of arc-shaped beam formwork erection and installation, and discloses an arc-shaped beam formwork construction tool and a construction method of the arc-shaped beam. The tool comprises a bottom formwork and a top formwork, a plurality of standard formworks fixed between the top formwork and the bottom formwork, a rotating insertion rod assembly for connecting two adjacent standard formworks, a steel wire rope assembly connected to all the standard formworks on the same side of the arc-shaped beam, and a tension bolt assembly connecting the side formworks on both sides of the arc-shaped beam in the thickness direction. The arc-shaped beam formwork of various sizes and various radii is assembled and spliced by the standard formworks, the rotating insertion rod assembly and the steel wire rope assembly, which has the characteristics of convenience, small size, easy installation, reduced material cost and high practicability. In addition, the device is convenient to assemble, can ensure the visual integrity of the arc-shaped beam during construction, improves the construction quality, and has low technical requirements for the workers.

The utility model provides a wave-shaped beam plate forming machining device which comprises a first machining area and a second machining area, and a supporting sliding part is arranged between the first machining area and the second machining area. A push plate moving towards the second machining area is arranged on the first machining area. Positioning columns are arranged at the two ends of the side, away from the first machining area, of the second machining area correspondingly, and the distance between the two positioning columns is smaller than the width of a steel plate used for producing the corrugated beam plate and larger than the width of the formed corrugated beam plate. The semi-finished product in the first machining area is pushed to the next machining area through the push plate, and then the corrugated beam plate can pass through the position between the two positioning columns by means of the width change of the bent semi-finished product, so that automatic feeding and discharging of the corrugated beam plate are completed. And meanwhile, hidden dangers to personal safety of workers due to the fact that hands or tools of the workers stretch into the machine in the operation process are avoided.

The application provides a pipeline intelligent hoisting device and method based on accurate orientation regulation, and relates to the technical field of municipal pipeline construction. The device comprises a hoisting frame, the bottom corners of the hoisting frame are provided with support column structures, four groups of hydraulic support rods are fixedly arranged on the bottom sides of the hoisting frame, the telescopic ends of the hydraulic support rods are rotatably provided with H-shaped wheels, two groups of L-shaped beam frames are fixedly arranged on the top of the hoisting frame, and the middle part of the L-shaped beam frame is slidably provided with a sliding seat in cooperation with a guide rail. The application is provided with a sliding seat, which provides stable movement control function, can move the pipeline to the delivery position according to the need, and can adjust according to the installation condition of the pipeline. According to the angle requirement, the extension range of different hoisting cables can be controlled to adjust the horizontal angle of the gripper, thereby realizing the adjustment of the laying angle of the pipeline, and solving the problem of inconvenient stable control of the existing hoisting device.

The utility model discloses a trough beam structure capable of separating pedestrians from vehicles, belongs to the field of bridge engineering, and solves the problems that the clearance below a bridge is difficult to meet the flood discharge requirement after the bridge is level-crossed with a dike, the noise and tail gas pollution of a motor vehicle lane is serious, and the pedestrian experience feeling is poor. A channel beam is of a channel structure formed by a bottom plate and web plates on the two sides of the bottom plate, cantilever plates are arranged on the two sides of the channel beam respectively, and bridge railings are arranged on the outer sides of the cantilever plates. The bottom plate is used for arranging a motorway, and the cantilever plate is used for arranging a sidewalk. By adopting the through channel beam structure and the cantilever slab overhanging structure, the height of the bridge building is effectively reduced, navigation and flood discharge clearance under the bridge are ensured, and roads on two banks do not need to be lifted; the webs on the two sides of the channel beam are used for conducting hard isolation on a sidewalk and a motorway, separation of people and vehicles is achieved, potential safety hazards are reduced, and noise and tail gas are isolated.

This invention relates to the field of novel materials, specifically a novel metamaterial exhibiting both multi-stable state and negative Poisson's ratio properties. It comprises a concave hexagonal frame, two arc-shaped beams positioned on the upper and lower sides of the frame's inner cavity, and a vertical rod. The two arc-shaped beams are fixedly connected to the upper and lower ends of the vertical rod via their respective central portions. When the structure is subjected to a vertical compressive load, the frame's diagonal bracing rotates inward, contracting and compressing the ends of the arc-shaped beams, generating a significant negative Poisson's ratio effect. This process forces the arc-shaped beams to bend and deform towards the center, accompanied by energy dissipation. When the displacement reaches a critical threshold, the arc-shaped beams buckle and overturn, switching to a steady state. This invention, through specific geometric configurations and differentiated material layouts, achieves morphological self-repair after impact and reuse under low-intensity conditions. This metamaterial can be arranged as a two-dimensional periodic array as a unit cell.

The utility model discloses a prefabricating device of a pi-shaped beam plate, which comprises an outer side mold and an inner tube mold, a concrete pouring cavity is arranged between the inner tube mold and the outer side mold, and the inner tube mold is connected with the outer side mold through a support. The inner tube mold is provided with a bottom mold and at least two box-type bodies, each box-type body is composed of a top inner mold and four side inner molds, corner molds are arranged between the adjacent side inner molds and between the side inner molds and the top inner mold, the side inner molds are hinged to the bottom mold, the bottom mold is firmly fixed to the ground through foundation bolts, and the adjacent top inner molds are connected through connecting plates. The top inner mold, the side inner mold and the box-type body are arranged to form a closed box-type structure, the vertical linkage rod and the horizontal linkage rod are arranged to be matched with the hydraulic jack to form a hydraulic connecting rod type detachable split inner mold, and the situation that a mold plate is deformed due to high temperature and demolding adsorption force is generated is avoided.

The invention discloses a self-resetting damper based on mechanical metamaterial axial pressure driving transverse cooperative instability. The damper is composed of metamaterial units arranged periodically, and each unit comprises inner left / right arc-shaped beams with opposite concave surfaces, outer left / right arc-shaped beams with opposite convex surfaces, inner / outer upper and lower fixing plates, a vertical supporting beam and left / right transverse connecting beams. The end parts of the inner and outer left / right arc-shaped beams are connected with inner / outer upper and lower fixing plates which are arranged in parallel; the middle of the vertical support beam is connected with the inner upper-lower fixing plate; the inner and outer arc-shaped beams are connected through left / right transverse connecting beams. The outer beam is bent inwards under shaft pressure, and the inner beam is driven to move inwards cooperatively to generate jumping instability. The multiple units are connected in series, and energy is consumed through continuous instability. The damper can be made of steel or a carbon fiber composite material, and the strength, rigidity and energy consumption characteristics can be customized by adjusting the geometric parameters of the arc-shaped beam and the topological configuration of the unit. In the deformation process, all components are kept in an elastic state, and the excellent self-resetting capacity is achieved.

The invention provides an installation method of a back ridge reinforcing system, and belongs to the technical field of building construction.The installation method comprises the steps that a bent arc secondary keel matched with the curvature of a bent arc section is manufactured through a numerical control hot bending forming or thin plate lamination cold bending process, and a frame body supporting system verified through a pre-pressing test is built; a plane secondary keel and a composite back ridge with a tenon-and-mortise structure interface are installed, a fluid-solid coupling numerical model is established to simulate the concrete pouring process and optimize back ridge arrangement, and a continuous load transmission path from a bottom die to a frame body supporting system is formed through the bent arc secondary keel and the tenon-and-mortise structure interface. A layered symmetrical pouring mode is adopted, vertical rod settlement and back ridge strain are monitored in real time, and the technical problem that a formwork deforms and is unstable due to the fact that the space curved surface load of a special-shaped beam curved section formwork system is difficult to accurately transmit to a plane supporting system is solved.

The utility model relates to the technical field of precast beam processing, in particular to a high-bearing self-adjusting T-shaped beam support embedded part, which provides a stable horizontal bearing surface for a beam main body through a bearing structure, reduces the problem of ground sinking and inclination caused by the dead weight of the beam body, and provides support for the beam main body or a main body template through a support structure. The supporting position of the supporting structure can be conveniently adjusted through the adjusting structure, and the practicability of the device is improved; comprising a bearing structure, a supporting structure and an adjusting structure, the supporting structure is installed on the bearing structure, and the adjusting structure is installed on the supporting structure.

The utility model relates to the technical field of suspensions, in particular to an integrated rear suspension air suspension device for a passenger car, which comprises C-shaped beams which are symmetrically arranged and connected through reinforcing components, each C-shaped beam is composed of a straight middle section and an arc transition section connected with the middle section, and the arc transition sections are connected with the middle section. The reinforcing assembly is connected with the arc transition section, and the reinforcing assembly is a supporting part composed of reinforcing beams which are symmetrically arranged; the damping part is arranged above the supporting part and comprises a damper arranged at the end part of the C-shaped beam and an air spring arranged between the damper and the reinforcing assembly; the stabilizing part is arranged at the middle section of the C-shaped beam and comprises longitudinal thrust rods which are symmetrically arranged on the side surface of the middle section of the C-shaped beam, inclined thrust rods which are arranged between the longitudinal thrust rods and are arranged in a V shape, and a U-shaped stabilizing rod of which the end part is arranged at the top of the middle section of the C-shaped beam, so that the stability of the rear suspension air suspension is improved.

The utility model provides a wave-shaped beam plate galvanization transfer chuck which comprises a fixed clamping leg and a rotating clamping leg, the rotating clamping leg can rotate with the length direction of the rotating clamping leg as the axis, one end of the rotating clamping leg extends outwards to form a clamping head, a clamping space is reserved between the fixed clamping leg and the rotating clamping leg, and one end of the clamping space is provided with an opening. When the rotating clamping leg rotates to the limiting position, the clamping head is arranged in the clamping space, and when the rotating clamping leg rotates to the second limiting position, the clamping space is communicated with the outside through the opening. The clamping heads are arranged on the sides of the ends of the rotary clamping legs, the clamping heads extend into or retreat from the clamping space through rotation, so that the clamping heads clamp objects in the clamping space, the clamping heads are transferred conveniently to drive the objects in the clamping space to move, and the clamping heads are convenient to move on the premise that the functions of the clamping heads are guaranteed. By means of the rotating clamping legs rotating in the length direction of the rotating clamping legs, the movement range of equipment is narrowed when an object is clamped, and meanwhile energy consumption is reduced.

The application relates to the technical field of vehicle anti-collision, in particular to a bias collision-resistant auxiliary frame and a vehicle. The bias collision-resistant auxiliary frame comprises an auxiliary frame body with a butterfly-shaped beam structure, and a reinforcing assembly welded with the front end of the auxiliary frame. The reinforcing assembly comprises a pair of longitudinal beams and a front cross beam. The pair of longitudinal beams are symmetrically and spacedly arranged, and the outer side of the longitudinal beam is formed with an outwardly extending outer protrusion. The two ends of the front cross beam respectively penetrate through the corresponding longitudinal beam and are welded with the outer protrusion. The application can effectively reduce the intrusion of the cab, improve the bias collision resistance, realize the lightweight and low energy consumption, achieve the anti-collision target, and has strong practicability and economy.

The utility model belongs to the technical field of C-shaped beam fixing, and particularly relates to a C-shaped beam fixing device for an automobile suspension, which comprises a bottom plate, a C-shaped beam and a screw, a plurality of fixing plates are fixedly mounted on two sides of the C-shaped beam, one end of the screw penetrates through the fixing plates and is in threaded connection with the bottom plate, and the C-shaped beam fixing device further comprises a limiting component used for preventing the screw from rotating. And the limiting assembly is arranged on the fixing plate. A threaded groove is formed in the top end of the bottom plate, and one end of the screw is connected into the threaded groove in a threaded mode. According to the C-shaped beam fixing device, by arranging the limiting assembly, the effect of limiting the position of the screw can be achieved, then the screw can be prevented from rotating automatically, the phenomenon that the screw loosens due to vibration of an automobile can be avoided by preventing the screw from rotating automatically, and therefore the fixing stability of the C-shaped beam can be improved.

The utility model relates to the technical field of steel machining, in particular to a mold machining leveling device which comprises a conveying assembly and two base strips, transverse grooves are formed in the upper surfaces of the two base strips, a servo motor is fixedly connected to the outer portion of one base strip, the external output end of the servo motor is fixedly connected with a lead screw through a coupler, and the lead screw is fixedly connected with the conveying assembly. The outer portion of the lead screw is in threaded connection with a door-shaped frame, an electric telescopic rod is fixedly connected to the inner wall of the top of the door-shaped frame, the output end of the electric telescopic rod is fixedly connected with a U-shaped beam, and a leveling roller is rotationally connected between two flanges of the U-shaped beam. According to the mold plate leveling device, the leveling roller can flexibly move on the base strip, different positions of a mold plate can be leveled, the leveling position does not need to be manually and frequently adjusted, the consistency of leveling precision is guaranteed, and the efficiency of leveling operation is greatly improved.

An illumination optical system is configured to convert an intensity distribution of incident light in a long axis direction from a Gaussian distribution, to thereby bring an intensity distribution of a shaped beam on a modulation surface of an optical modulator in the long axis direction into a top hat distribution, and to guide the incident light to the optical modulator as parallel light in the long axis direction and as convergent light in the short axis direction. A short axis side light shielding part is disposed at a condensing position on a short axis side of a modulated beam which is emitted from the optical modulator and is convergent light on a short axis side and blocks a non-zero-order diffracted beam on the short axis side of the modulated beam.

The utility model discloses a front upper and lower cross beam system suitable for a rear fulcrum hanging basket of a PC cable-stayed bridge with an ultra-wide variable-width Pi-shaped beam. Characterized in that; the system comprises a main truss, a front upper cross beam, a suspender and a front lower cross beam, the main truss is of a double-truss triangular truss structure and is transversely arranged to be tightly matched with the position of a pi-shaped beam main longitudinal rib, and a stable rigid supporting framework is formed. The front upper cross beam is erected between the two main trusses, a low-section steel beam is adopted to replace a traditional truss form, the suspenders are intensively arranged in corresponding areas of the main longitudinal ribs under the main trusses, a linear force transmission path of the main trusses, the suspenders and the main longitudinal ribs is formed, and the front lower cross beam is connected through the suspenders. According to the rear fulcrum hanging basket, the problems that due to the fact that the span of a front upper cross beam is too large, a traditional rear fulcrum hanging basket (1) is forced to adopt an ultrahigh-section profile steel or truss structure, the overall gravity center of the hanging basket moves upwards, and the stability is poor when the hanging basket walks in a widening section and loads are unbalanced are solved; and (2) the problems of non-uniform force transmission of the upper cross beam, fuzzy load force transmission path, poor overall rigidity performance and incapability of meeting the construction requirements of the ultra-wide and variable-width Pi-shaped main beam due to excessive suspenders are solved.

The utility model provides a transformer with a heat dissipation function, which relates to the technical field of transformers and comprises a transformer body, an I-shaped beam is fixedly mounted at the bottom end of the transformer body, heat dissipation fins are fixedly mounted on the surface of the transformer body, and a connector is fixedly mounted at the top end of the transformer body. A ventilation opening is formed in the surface of the transformer body, a fixing plate is fixedly mounted in the ventilation opening, and a protective net is fixedly mounted on the surface of the fixing plate, so that a better using effect is achieved, a motor on the back face of a mounting plate is started in the using process, and the motor drives fan blades to rotate through a rotating rod; at the moment, the fan blades can blow hot air in the transformer body out of the interior of the transformer body through the space between the connecting rods and the supporting rods, so that the problem that the temperature of an existing transformer cannot be effectively reduced due to the heat dissipation performance of the transformer, and consequently the transformer is prone to running at a high temperature for a long time is solved; and the service life of the transformer is shortened.

A microwave imaging radar sensor for creating an image of at least a part of its surrounding space includes at least one transmitter unit, a receiver unit and an evaluation unit having an output port to output an image connected to the transmitter and receiver units. The image has fields related to a pair of a transmit channel and a receive channel, where at least two transmit channels and at least two receive channels each correspond to a fan shaped beam having a first dimension (D1) which is significantly larger than and perpendicular to a second dimension (D2). The field is assigned to a radar result characteristic (RC) provided by the receive channel whose fan shaped receive beam overlaps with the fan shaped transmit beam of the transmit channel defining an overlap area. The transmit channel correlates with the transmitter unit, which comprises a refractive beamformer having a transmit reference plane to which the fan shaped transmit beams of the transmit channels are perpendicular with their first dimension (D1). The transmitter unit embodies transmit transition structures associated with the refractive beamformer at different transition positions, so that each transmit channel is related to at least one transmit transition structure. The receive channel correlates with the receiver unit that has a refractive beamformer having a receive reference plane to which the fan shaped receive beams of the receive channels are perpendicular with their first dimension (D1). The receiver unit includes receive transition structures associated with the refractive beamformer at different transition positions, so that each receive channel is related to at least one receive transition structure.

A corrugated beam guardrail stand column for controlling the embedding depth comprises a stand column body. The main body structure of the stand column is hollow column-shaped; a metal sealing pipe is fixedly arranged on the inner wall of the stand column body. A transparent tube is fixedly arranged between the metal closed tube and the upright post main body; a display window is arranged in the middle of the metal closed tube opposite to the transparent tube; the transparent tube is filled with colored liquid; and the metal closed tube is vertically provided with a graduated scale on one side of the transparent tube. The metal closed pipe is arranged in the stand column body, the graduated scale is arranged on the metal closed pipe, the embedding depth is calculated by comparing the graduated scale during construction and installation, the embedding depth of the stand column body can be conveniently controlled and checked, and constructors can rapidly and visually judge whether the stand column body is inserted in place or not. The length of the stand column body is prevented from being mistakenly used.

The invention provides an automobile frame longitudinal beam structure which comprises a front-section longitudinal beam, a middle-section longitudinal beam and a rear-end longitudinal beam which are sequentially arranged, the front-section longitudinal beam is inserted into the middle-section longitudinal beam, and the rear-end longitudinal beam is inserted into the middle-section longitudinal beam; a middle-section reinforcing beam is fixedly connected to the interior of the middle-section longitudinal beam, a battery pack mounting plate is fixedly connected to the inner bottom wall of the middle-section longitudinal beam, and the battery pack mounting plate is located below the middle-section reinforcing beam. The problems of defects of a longitudinal beam formed by splicing and welding an existing C-shaped beam and an integrated longitudinal beam inner high-pressure frame are solved.

The invention relates to a medium-low speed magnetic suspension rail transit standard beam, and relates to the technical field of rail transit. The medium-low speed magnetic suspension rail transit standard beam comprises a rail bearing table and a U-shaped beam, the U-shaped beam comprises a bottom plate and two bent beams located at the two ends of the bottom plate. The rail bearing table comprises a supporting structure and a top plate, the supporting structure is arranged on the bottom plate, and the top plate is arranged on the supporting structure; the U-shaped beam and the supporting structure are symmetrical about the line center line. The rail bearing table and the U-shaped beam are integrally formed. The rail bearing table and the U-shaped beam are integrated and integrally prefabricated in a beam field, the rail bearing table is longitudinally full-length and free of breaking joints, the rail bearing table and the U-shaped beam jointly participate in structural stress, the construction process is simplified, the workload of cast-in-place is reduced, and the quality of the beam is guaranteed.

The utility model discloses welding equipment for an I-shaped beam, which belongs to the technical field of I-shaped beam manufacturing and comprises a working platform and a portal frame distributed along the length of the working platform, the portal frame stretches across the working platform, and I-shaped beam fixing components capable of pressing the I-shaped beam are uniformly distributed on the top surface of the working platform in the length direction; an I-shaped beam welding assembly capable of assembling the I-shaped beam is arranged on the portal frame; the I-shaped beam fixing assembly comprises a cushion block, a fixing seat and a first air cylinder; the cushion block can support a web plate of the I-shaped beam to be in a horizontal state, the fixing base can support one wing plate of the I-shaped beam to be perpendicularly connected with the web plate in an abutting mode, the first air cylinder can push the other wing plate of the I-shaped beam to move towards one side of the web plate, and therefore the two wing plates and the web plate are in a perpendicular clamping state. The cushion block supports the height of the web of the I-shaped beam, the fixing base is matched with the first air cylinder to enable the two wing plates to abut against the two ends of the web, welding of the splicing position is completed through the welding assembly, so that the convenient operation of rapid press fitting is achieved, the labor intensity is reduced, and the productivity is improved.

A kind of slope roof assembly type batten device, belong to building engineering technical field, including water course, batten body, the water course including water course main body and several T-shaped beams being arranged at equal intervals on water course main body, the top end of the wing plate of T-shaped beam is super up, web is downward, batten body is assembled and connected with T-shaped beam by adjusting screw rod and inclined screw rod.The structure of the present application is improved by the water course and the batten body, which can effectively improve the connection strength between the two, avoid the loosening of the tiles, and improve the service life of the roof. Moreover, the present application is a non-destructive assembly type structure, easy and fast to install.

The invention belongs to the technical field of auxiliary equipment for ship building, and particularly relates to T-shaped beam panel pretreatment integrated forming equipment. Comprising a rust removal mechanism, a polishing mechanism, a mechanical straightening mechanism, a chamfering roller and a rack, a supporting roller is installed on the rack, the supporting roller supports a steel belt, the rust removal mechanism, the polishing mechanism, the straightening mechanism and the chamfering roller are sequentially arranged on the rack, the chamfering roller is arranged at the discharging end, the rust removal mechanism is arranged at the feeding end, and the polishing mechanism is arranged at the discharging end. The derusting mechanism comprises a derusting roller and a rotating shaft, the derusting roller comprises a shell, a knocking block and lifting grooves, the inner wall of the shell is provided with 3-5 lifting grooves, the lifting grooves are distributed in the inner wall, and the knocking block is located in the shell. The device comprises a plurality of working procedures such as rust removal, polishing and mechanical straightening, a plurality of circulation sites are needed, the device is adopted, all the working procedures are integrated, continuous operation of the working procedures such as rust removal, polishing and straightening is achieved, the production efficiency and the machining precision are improved, and the sectional material strength is enhanced.

According to the unmanned aerial vehicle rotor wing blade, the C-shaped beams are bonded to the front side and the rear side of the middle foam, the middle foam is clamped between the blade root metal lining and the blade tip foam lining and is wound into a whole through the winding girder, the winding girder and the C-shaped beams are bonded together to form a double-layer reinforcing beam structure, centrifugal force is resisted, and the flapping, shimmy and torsional rigidity of the blade is improved; the middle foam with the C-shaped beam, the blade root metal lining and the blade tip foam lining serve as internal supports for winding the girder, the winding quality and efficiency are improved, an integral structure of the blade root metal lining and the girder is formed, the bearing capacity of a blade body and blade root metal connecting interface is improved, the risk of interface failure of the blade root is effectively reduced, and the service life of the blade is prolonged. And the blade structure safety is improved. The impact-resistant explosion-proof coating is adopted as the front edge covering edge, the manufacturing period is shortened, later maintenance is facilitated, direct winding on a mold is achieved, the forming operation process is simplified, and the forming efficiency of the blade is improved on the premise that the same protection capacity of the impact-resistant explosion-proof coating and a metal covering edge is guaranteed.

The invention discloses a female terminal assembly and an electric connector, and belongs to the technical field of electric connectors, and the electric connector comprises a female terminal main body which is provided with an accommodation cavity; the elastic clamp is arranged in the accommodating cavity, the elastic clamp comprises a first elastic clamping plate and a second elastic clamping plate which are opposite to each other so as to form an accommodating cavity into which a matched male terminal is inserted, and each of the first elastic clamping plate and the second elastic clamping plate comprises a plurality of contact elastic sheets which are connected with the front part of the clamping plate and the rear part of the clamping plate; each contact elastic sheet is configured to be recessed towards the inner part of the elastic clamp, and the middle part of the contact elastic sheet is connected with an arched beam protruding towards the outer side of the elastic clamp.