4755 results about "Metal sheet" patented technology

A battery pack according to one or more embodiments of the present disclosure includes a plurality of battery cells; and a housing including a bottom member, a plurality of side walls, and a top member, the bottom member, the plurality of side walls, and the top member form an interior accommodation space configured to accommodate the plurality of battery cells, wherein at least one among the plurality side walls, the top member, and the bottom member are formed by a plurality of metal sheets that are roll bonded to each other, wherein at least one cooling channel is formed between bonding areas of the plurality of metal sheets, and wherein at least one crash channel is formed between bonding areas of the plurality of the metal sheets.

The invention discloses a metal plate laser cutting control method, and relates to the technical field of laser cutting, material parameters, thickness information and cutting path data are obtained, a mixed enveloping rectangle algorithm is combined with a genetic algorithm to optimize a cutting sequence, and a path sequence containing idle stroke avoidance and nested graph priority is generated; constructing a laser parameter prediction model based on the material, thickness and path characteristics, and dynamically adjusting the power gradient; the slag splashing state is judged through data fusion of a capacitive sensor and an encoder, a quality feedback signal is extracted in combination with machine vision, and laser parameters are dynamically adjusted through a fuzzy control algorithm; wavefront distortion is monitored in real time, the correction frequency is adjusted according to the slag splashing state, and a deformable mirror is used for compensating the phase; when the quality is abnormal, historical parameter combinations are retrieved through a cosine similarity algorithm for joint compensation. According to the method, the path cutting efficiency is improved, and the problems of low efficiency of path planning and parameter adjustment lagging in the prior art are solved.

The invention relates to a metal sheet detection method, system and device, computer equipment and a storage medium. The method comprises the following steps: controlling an ultrasonic guided-wave probe to generate an ultrasonic guided-wave signal under the condition that a metal sheet is transmitted to a preset detection area, so that the ultrasonic guided-wave signal is propagated in the metal sheet; acquiring a reflection echo signal of the metal sheet; performing feature analysis on the reflection echo signal to obtain a feature analysis result; and detecting whether the metal sheet has defects or not according to a feature analysis result to obtain a defect detection result of the metal sheet. The method is beneficial to improving the detection efficiency of the metal sheet.

The utility model discloses fixed wiring terminal automatic assembling equipment which comprises a machine frame, a base body feeding vibration disc and a metal sheet feeding vibration disc, a station adjusting assembly is arranged on the machine frame, and an assembling positioning tool is connected to the station adjusting assembly. A transverse transmission assembly, a longitudinal transmission assembly and a discharging station are arranged on the periphery of the station adjusting assembly. A base moving and taking assembly is arranged on the transverse transmission assembly, and a metal sheet moving and taking assembly and a screw assembling assembly are arranged on the longitudinal transmission assembly. According to the fixed type wiring terminal automatic assembling equipment, full-process closed-loop automatic production including feeding, assembling, rotating, secondary assembling and discharging is achieved, the longitudinal transmission assembly is responsible for metal sheet moving and taking and screw assembling, the longitudinal transmission assembly and the longitudinal transmission assembly share a longitudinal rail, time division multiplexing and efficient connection are achieved, the station adjusting assembly automatically adjusts an assembling positioning tool, and the assembling efficiency is improved. A single set of equipment can complete double-sided assembly, multi-process parallelism and spatial multiplexing of the wiring terminal step by step, and the production takt of the wiring terminal is greatly reduced.

The invention relates to the technical field of metal cutting, discloses metal plate laser cutting equipment with a laser head collision early warning function, and aims to solve the problem that the collision risk of an existing cutting head and a convex part of a thin plate is high. Through the displacement component, the laser cutter, the positioning assembly and the central control unit, a metal sheet to be machined is placed on the workbench, then the laser cutter is used for cutting the metal sheet to be machined, in the whole operation process, pictures on the workbench can be shot through the industrial camera, and the working efficiency is improved. The real-time image is displayed on the controller through the real-time image display module, an image model is established through the 3D modeling module, a worker can observe more visually, when an irregular thin plate is encountered, setting is conducted through the height compensation module at the moment, the position of a tool bit of the laser cutter is always at the same height with the thin plate, and the machining precision is improved. Once the set equal height changes, the collision alarm module gives an early warning, and the overall safety performance is improved.

The utility model discloses an auxiliary tension bracket for slitting and cutting a silicon steel coiled material, which belongs to the technical field of slitting machine tension brackets, and comprises a slitting machine, a cutter arranged on the slitting machine, support frames arranged at one end of the slitting machine and oppositely distributed, and a support seat arranged between the two support frames, limiting rollers and positioning blocks used for supporting are distributed at the upper end of the supporting base at equal intervals, supporting plates are fixedly installed at the upper ends of the positioning blocks, and an adjusting mechanism is arranged between the two supporting frames. A metal plate is conveyed to the supporting plate through the slitting machine, the servo motor is started to drive the two-way lead screw to rotate, the oppositely-distributed movable plates are made to be close to each other till the limiting rollers are close to the side edge of the metal plate, and at the moment, the slitting machine continues to convey the metal plate. And the tension bracket is fast to adjust, manual approaching is not needed, and potential safety hazards caused by approaching of workers to mechanical equipment are avoided.

The present invention relates to the field of electronic devices of wireless communication systems. Disclosed is an ultra-wideband and high-protection-efficiency filtering energy selective surface, comprising one or more layers of reflecting surfaces; each reflecting surface is mainly composed of a plurality of metal sheets which are located on the same plane, have the same shape and are arranged in central symmetry; a gap for electrical isolation is formed between every two adjacent metal sheets; each gap is provided with a PIN diode; the anodes and cathodes of all the PIN diodes are arranged in a clockwise or counterclockwise direction; and all the gaps form an interconnected gap structure on the plane where the reflecting surface is located. The ultra-wideband and high-protection-efficiency filtering energy selective surface can be achieved by a first-order filtering energy selective surface unit or a second-order filtering energy selective surface unit. The filtering energy selective surface of the present invention has a small surface thickness and a simple structure, can achieve fast roll-off filtering for low-power signals, achieve an ultra-wide suppression stopband, and achieve ultra-wideband and high-efficiency protection for high-power electromagnetic waves.

The present invention relates to the field of metal cutting, and more specifically, to a metal shearing machine and a method for using the same. A metal shearing machine comprises two groups of T-shaped seats, wherein the T-shaped seats are rotatably connected to a rotating shaft 1, a disc shear 1 is fixed to the end of the rotating shaft 1, a cylindrical table is provided on the outside of the disc shear 1, and a gantry is vertically slidably connected to the T-shaped seats, the upper part of the gantry is rotatably connected to a rotating shaft 2, a disc shear 2 is fixed to the end of the rotating shaft 2, and the disc shear 2 is located above the cylindrical table. The method of use comprises: S1: placing the metal sheet on the upper side of the beam, and adjusting the two hand-shift seats to contact the two edges of the metal sheet respectively; S2: making the two pressure wheels press on the front and rear edges of the metal sheet respectively; S3: pushing the two edges of the metal sheet into between the two groups of disc shears 1 and disc shears 2 respectively; S4: through the synchronous rotation of the disc shear 2 and the rubber wheel, the rubber wheel continuously drives the metal sheet to move.

The stamping equipment capable of conveniently fixing the inner container of the electric cooker comprises a stamping machine body, a stamping assembly is arranged at the upper end of the stamping machine body, a pushing device is arranged at the position, located below the stamping assembly, in the stamping machine body, and cleaning assemblies are fixedly installed on the two sides of the stamping machine body. The supporting plate supports the center position of the metal plate, the situation that a bulge is formed in the center of the electric cooker inner container in the stamping process, and the appearance and quality of the electric cooker inner container are affected is avoided, the electric cooker inner container descends and stays at the top of the pushing plate through the counter-acting force of the pressing spring, the electric cooker inner container is convenient to take out, and then the production efficiency of the electric cooker is improved. The surface of the metal plate is cleaned, the situation that during stamping, dust and impurities on the surface of the metal plate cause indentation of the electric cooker inner container, and consequently the reject ratio of finished electric cooker inner container products is increased is avoided, stamping and trimming are integrated, the performance of stamping equipment is improved, and the production efficiency of the electric cooker inner container is improved.

The present invention relates to the technical field of hardness detection, and specifically discloses a hardness detection device for rubber products, including: a base and a measurement frame. The measurement frame is arranged on the top of the base, and a regulator is arranged on the surface of the measurement frame. A pressing needle member is arranged at the bottom of the regulator, and a support seat is arranged on the surface of the base; the transmission speed after the rotation of the adjustment knob is switched through the docking component and the switching component to achieve the adjustment of the rotation gear accuracy of the pressing needle member; according to the energized states of the first metal sheet, the second metal sheet and the third metal sheet, the moving positions of the three groups of the second rotating rod are controlled to achieve gear switching, so as to adjust the rotation accuracy of the adjustment knob according to the sample thickness. According to the trigger signal of the trigger switch base, the working duration of the second motor is controlled, which indirectly drives the rotation of the threaded seat. When the threaded seat rotates, the second screw rod moves vertically to achieve the compensation operation of the moving distance of the second screw rod, reducing the risk of the environmental temperature affecting the hardness detection effect.

A reinforcement beam for an automotive component is continuously formed with a metal sheet that is roll formed to have at least one tubular portion that extends along a length of the reinforcement beam. A solid state forge weld is formed between an edge of the metal sheet and an intermediate portion of the metal sheet to close a seam that extends along the tubular portion of the reinforcement beam. Prior to forming the solid state forge weld, select portions of the metal sheet are heated to a desirable welding temperature with a high frequency current delivered by electrical contacts to opposing sides of the weld seam. The desired welding temperature may burn off a galvanized coating on the metal sheet at the select portions prior to forming the solid state forge weld that is generally void of zinc inclusions.

The invention discloses an oil-immersed transformer internal air pressure adjusting device and a control method thereof, and relates to the technical field of transformer operation control. A support body is inserted into a vibration box, a flow injection cavity is formed between a side plate of the vibration box and vertical plates, and a plurality of vibration metal sheets are movably inserted into the two vertical plates and a vibration frame. The vertical plate and the vibration frame are provided with circulation grooves located between the adjacent vibration metal sheets, and the vibration metal sheets are vertically provided with circulation holes located in the vibration cavity area. An electromagnetic mechanism is arranged at the top of the vibration box. A backflow pipe is installed between the bottom of the transformer oil immersion and the vibration box flow injection cavity. The top of the vibration box communicates with an air pipe which is connected with an air device arranged outside the transformer. Mixed gas components in an oil body can be effectively discharged, bubbles doped in the oil body of the transformer are reduced, and therefore the insulating strength of the transformer is improved, and safe operation of the transformer is guaranteed; impurities such as air and moisture are prevented from entering the transformer due to abnormal air pressure.

The invention relates to the technical field of ships, in particular to a ship guardrail which comprises two stand columns, a get-off guardrail is installed between the two stand columns and comprises a plurality of metal plates, sliding grooves are formed in the left side and the right side of the bottom face of each metal plate, two sliding blocks are fixedly installed on the top face of each metal plate, and locking assemblies are further installed on the stand columns. Protective guardrails are further symmetrically arranged on the left side and the right side of the passenger getting-off guardrail and comprise inner guardrails and outer guardrails, a plurality of protective rods are further installed on the inner guardrails, the outer guardrails comprise rotating columns which are vertically and rotatably installed on a ship deck, lower transverse rods are horizontally fixed to the lower sides of the rotating columns, and a plurality of supporting plates are installed on each lower transverse rod. According to the telescopic passenger getting-off guardrail, the telescopic passenger getting-off guardrail is formed through the multiple metal plates, the passenger getting-off guardrail can stretch out and draw back to form a longer passenger getting-off channel, the supporting plate is arranged on the outer guardrail to support the bottom of the passenger getting-off guardrail, the length of the passenger getting-off guardrail is increased, and the strength of the passenger getting-off guardrail is guaranteed.

The invention discloses a metal plate long-distance traction positioning device which is installed at the output end of a flat steel uncoiling and finishing system and comprises a supporting roller assembly, a fixed supporting mechanism, a transverse moving supporting mechanism and a gantry carrying mechanism. The supporting roller assembly is used for supporting flat steel output from the flat steel uncoiling and finishing system and guiding products to the fixing and supporting mechanism. The fixing and supporting mechanism is provided with a flat steel supporting block and a circular pipe supporting block which are arranged in parallel and used for fixing flat steel and a circular pipe. The transverse moving supporting mechanism comprises a transverse moving platform, a tube panel supporting frame, a round tube supporting mechanism and a flat steel supporting mechanism, and the transverse moving platform can integrally transversely move and slide and is used for moving the tube panel assembly loaded on the transverse moving platform to another machining station; the gantry carrying mechanism comprises a portal frame, a flat steel traction mechanism and a tube panel pressing mechanism, full automation of flat steel traction in the tube panel assembling procedure is achieved, and manual assistance is not needed.

The invention belongs to the technical field of metamaterial sensors, and particularly relates to a metamaterial multi-parameter sensor for a complex environment, which comprises a dielectric substrate, a temperature sensor, a pressure sensor and a strain sensor, and is characterized in that the dielectric substrate is made of high-temperature co-fired alumina ceramic; the temperature sensor is arranged at the left end of the dielectric substrate; the pressure sensor is arranged in the middle of the medium substrate; and the strain sensor is arranged at the right end of the dielectric substrate and comprises a metal sheet structure capable of generating relative displacement. According to the invention, long-distance signal monitoring is realized by adopting a microwave scattering technology, and the problem that a traditional wired sensing transmission line is damaged at a high temperature is solved; the high-temperature-resistant aluminum oxide HTCC ceramic is used as the dielectric substrate, temperature measurement within the range of 25 DEG C to 1200 DEG C, pressure within the range of 0 kPa to 700 kPa and strain measurement within the range of-400 mu epsilon to + 400 mu epsilon are achieved, the sensor is smaller in size and higher in sensitivity, and application of a traditional sensor in the multi-metal environment is expanded.

The invention relates to the technical field of hot riveting, and discloses split type hot riveting head modular hot riveting equipment which comprises an upper tool, a lower tool, a heating body arranged at the bottom of the upper tool, a plurality of hot riveting heads arranged at the bottom of the heating body in a linear array mode and a product arranged at the top of the lower tool. The two sets of detachable heating rods are arranged on the two sides of the heating body respectively, the three sets of thermocouples are arranged at the bottom of one side of the heating body, and the heat conduction unit is arranged on the hot riveting head. The heat conduction assembly, the reset assembly and the overturning assembly form a closed-loop action, a heat conduction plate preheats a metal sheet through a heat conduction ring, and infirm connection and deformation caused by temperature difference are avoided. Due to small deflection and overturning separation during hot riveting, heat interference and flash adhesion are avoided; after hot riveting, the material is reset and pushed to be stripped, pull wires are prevented from being pulled up, and a hot riveting head can be surrounded for heat preservation. The whole process does not need extra driving, product quality is guaranteed, takt time is shortened, and automation efficiency is improved.

A freewheeling mechanism includes a freewheeling member with a clamping structure, clamping parts arranged on the clamping structure, and a sheet metal cage for spacing the clamping parts in a direction of revolution. The sheet metal cage is placed on the freewheeling member and includes a base body with a support portion extending radially outward and a coupling rim on a first axial side. The coupling rim includes a coupling disk fixed coaxially on the base body and adjoining the support portion. The coupling disk includes a coupling portion with a coupling structure for interlocking coupling to the clamping structure such that the sheet metal cage is held on the freewheeling member for conjoint rotation. The support portion and the coupling disk have a same external diameter with assembly recesses provided at their respective outer circumferences, and the assembly recesses lie over one another in an assembled state.

The invention discloses an automatic spraying device for a metal plate product, and belongs to the field of spraying equipment. Comprising a paint spraying room, a feeding device and nozzles. The spray head flexibly moves in the paint spraying room through the lifting device, the guide pipe is connected with paint spraying equipment through the side wall groove, the paint blocking structure is arranged in the side wall groove, and the folding plate is adopted for dynamic sealing to prevent paint mist leakage. The feeding device conveys workpieces through a belt pulley hanger rail and a hoisting head, is provided with a posture fine adjustment structure, is driven by a rotating rod and an air cylinder, corrects angle inclination and spacing deviation of the hoisting head caused by belt tensioning, and ensures that the workpieces accurately enter a paint spraying room. A gas escape capturing device is arranged in the paint spraying room and comprises an in-room capturing structure and an inlet and outlet capturing structure, paint mist and VOCs are efficiently collected through a multi-stage ventilation slot plate and an exhaust pipe, and emission meets the environmental protection standard. The equipment is accurate in spraying, high in automation degree, convenient to maintain due to modular design and suitable for industrial paint spraying scenes such as automobile parts, and the paint spraying quality, the production efficiency and the environmental protection performance are remarkably improved.

The invention relates to the field of electro connecting pressure gauges, in particular to an electro connecting pressure gauge with an alarm function, which comprises an external pipeline connected with an external pressure pipeline, the outer end face of the external pipeline is fixedly connected with a dial plate, and a transparent shield is embedded and matched on the dial plate; the pointer adjusting mechanism is used for adjusting the position of the pointer, and the pointer adjusting mechanism is arranged in the center of the transparent shield; the pointer mechanism is used for carrying out alarm processing when an upper limit is exceeded or a lower limit is lower, and the pointer mechanism is arranged on the dial plate and is protected by the transparent protective cover; wherein the pointer adjusting mechanism comprises a circular groove, the circular groove is formed in the top of the transparent protective cover, and according to the electric contact pressure gauge with the alarm function, a friction damper (such as metal sheet contact friction) is arranged on a reset path, vibration energy is consumed through friction, and impact and residual vibration of the second bourdon tube in the reset process are reduced.

The invention relates to the technical field of electrochemistry, in particular to a metal power-on weightlessness prediction method and system based on multi-modal fusion, and the method comprises the steps: obtaining weightlessness experiment data of a metal sheet under different current densities and different power-on time and a corresponding surface topography image sequence, and forming a multi-modal data set; wherein the numerical time sequence data uses a first neural network to extract numerical time sequence features representing a local dependency relationship; the image sequence uses a second neural network to extract image time sequence features representing global space-time evolution; and carrying out feature interaction and fusion on the numerical time sequence features and the image time sequence features by utilizing a cross attention fusion mechanism, and outputting a metal sheet weightlessness prediction value at a specific moment in the future. A cross-modal cross attention mechanism is introduced, and a numerical rule and visual form change information are dynamically fused to form complementary and enhanced joint feature representation, so that the precision of a weightlessness prediction value is improved.

The invention belongs to the technical field of metal cutting, and particularly relates to a metal plate cutting device which comprises a roller conveyor body, and a plurality of rollers are arranged on the roller conveyor body. A chain wheel box is arranged on one side of the roller; a cutting mechanism is arranged above the roller conveyor body, and a limiting mechanism is arranged below the cutting mechanism. Through cooperation of a connecting shaft, a rotating rod, a sliding column, a connecting rod and a limiting seat, a roller drives the connecting shaft to rotate, the connecting shaft drives the rotating rod to rotate, the rotating rod drives the sliding column to rotate, the sliding column drives the connecting rod to swing in a reciprocating mode, and the connecting rod drives the limiting column to swing in a reciprocating mode. The limiting column extrudes the limiting base through the limiting groove to do up-down reciprocating motion, the limiting base drives the connecting plate to do up-down reciprocating motion, the connecting plate drives the lifting plate to do up-down reciprocating motion, the lifting plate drives the rubber hammer to do up-down reciprocating motion, the metal plate is hit, and the function of cleaning excess materials is achieved.

The invention belongs to the technical field of metal container manufacturing equipment, and particularly relates to cutting and welding equipment for metal container manufacturing, which comprises a positioning assembly, one side of the top of the positioning assembly is provided with a cutting assembly for metal container manufacturing, and the bottom of the positioning assembly is rotatably connected with a welding assembly for metal container manufacturing. The top of the positioning assembly is in transmission connection with a clamping assembly, a metal pipe is installed on the clamping assembly in a clamped mode, the cutting assembly horizontally moves, and the clamping assembly drives the metal pipe to rotate, so that different faces of the metal pipe and the cutting assembly are subjected to cutting treatment. The cut metal pipe falls to the position horizontal to the welding assembly through the positioning assembly, the metal sheet and the bottom end of the inner wall of the cut metal pipe are welded through the welding assembly, the horizontal state of the metal pipe and the metal sheet in the welding process is effectively controlled, and the overall quality of a metal container after welding is completed is improved.

The utility model provides a testing device for a metal halogen battery. The testing device comprises a transparent container and a sealing cover, the bottom of the inner side of the transparent container is filled with a solid or liquid positive halogen simple substance; a negative electrode assembly is suspended on the top of the inner side of the transparent container, is positioned above the positive halogen simple substance and is not in direct contact with the positive halogen simple substance; the negative electrode assembly comprises two stacked negative electrode metal sheets and a conductive net clamped between the two negative electrode metal sheets; the conductive net is connected with a cathode lead, the top wall of the transparent container is provided with a first through hole for the cathode lead to pass through, and the upper end of the cathode lead passes through the first through hole and falls outside the transparent container; the side wall of the transparent container is provided with a second through hole for the positive lead to penetrate through, the inner end of the positive lead abuts against the surface of the negative metal sheet, and the outer end of the positive lead falls outside the transparent container. The testing device disclosed by the utility model can provide reference for selecting proper electrode materials and setting technical parameters during industrial production.

The invention discloses a sheet metal thickness measurement method based on a hybrid system zero group velocity Lamb wave technology, and belongs to the field of nondestructive testing and evaluation.The method comprises the following steps that a hybrid detection system is built, and an out-of-plane displacement vibration signal of a sheet metal is obtained based on the hybrid detection system; converting the out-of-plane displacement vibration signal into a frequency domain signal through fast Fourier transform, and extracting a resonant frequency corresponding to a formant of a zero group velocity Lamb wave mode in the frequency domain signal; calculating a frequency-thickness product based on material parameters of the metal plate; and based on the frequency thickness product, the resonant frequency and a pre-established frequency thickness product-thickness function relationship, performing inversion to obtain a thickness value of the metal plate.

The invention relates to the technical field of part stamping dies, in particular to an automobile part machining stamping forming die which comprises a mounting plate, a fixed supporting structure is arranged below the mounting plate, a first mounting block is fixedly mounted on the upper side of the mounting plate, and a detachable lower die base is arranged on the upper side of the first mounting block. In the process that a sliding block moves downwards along with a movable adaptive block, the top face of the sliding block retracts into a first sliding cavity, space is reserved for stamping, when stamping is completed and an upper die block ascends, a second spring pushes the movable adaptive block to move upwards, the top of the sliding block protrudes out of the surface of a lower die base to eject a workpiece, and the top of the sliding block makes contact with an extrusion sensor to trigger an automatic oil injection pump; lubricating oil is injected into the oil injection hole through the guide pipe and sprayed to the surface of the lower die base through the oil injection groove to complete lubrication of the lower surface, the bidirectional lubrication mechanism ensures that the metal sheet is comprehensively lubricated in the stamping process, friction loss is remarkably reduced, and the product surface quality is improved.

The utility model relates to the technical field of protective coating spraying, and aims to provide a protective coating spraying device for surface treatment of metal plates, which comprises a bottom plate, a first vertical plate and a second vertical plate are symmetrically arranged on the bottom plate, an adjusting device is arranged between the first vertical plate and the second vertical plate, a turnover device is rotatably arranged on the first vertical plate, and the turnover device is rotatably arranged on the second vertical plate. A fixing device is arranged between the adjusting device and the turnover device, a spraying assembly is arranged on the first vertical plate and the second vertical plate, a limiting plate is pulled, then an adjusting lantern ring is driven to move, then limiting of a limiting rod to a connecting shaft is relieved, then the connecting shaft is screwed, the plate is turned over, then the limiting plate is loosened, and the spraying assembly is arranged on the first vertical plate and the second vertical plate. And then the limiting rods limit the connecting shafts again, finally, the plates are turned over conveniently, and the spraying efficiency of the plates is greatly improved.

The invention relates to the technical field of three-dimensional measurement, and discloses a method and system for measuring the transparent dispensing volume, a computer readable storage medium and a computer program product. The method comprises the following steps: placing transparent dispensing glue on a preset metal sheet, and shooting to obtain cross section contour image data of the transparent dispensing glue; extracting a laser stripe center contour line of the two-dimensional contour slice; reconstructing a complete three-dimensional depth distribution model to obtain a dispensing depth map; carrying out plane attitude correction to realize fitting; performing three-dimensional connected domain analysis on the fitted dispensing depth map to screen out a dispensing volume measurement area; and calculating the dispensing volume in the dispensing volume measurement area by using a projection method. In combination with a depth map processing algorithm, high-speed and high-precision measurement of the dispensing volume is realized, so that the dispensing volume before dispensing is accurately controlled, and the method has important significance on product quality control in dispensing process production.

The invention discloses a double-frequency slot antenna structure with a back cavity and a design method, which are used for an omnidirectional communication system. The antenna can work in two frequency bands, the antenna comprises a disc metal cavity, eight arc-shaped gaps above the cavity, and some metal columns and metal sheets in the middle of the cavity, and the antenna feeds the gaps from the center of the bottom of the cavity in a coaxial probe feeding mode; a filtering mechanism is formed through a metal column and a metal sheet in the middle of the cavity, and high frequency is blocked through low frequency, so that high-band radiation waves are limited in the small cavity in the middle and then are radiated out from four first arc-shaped gaps above, and low-band radiation waves are radiated out from four second arc-shaped gaps above the whole disc cavity after passing through the filtering mechanism; high-frequency energy and low-frequency energy can be separated, different cavity sizes are formed at different frequencies, and working frequency radiation is controlled by combining the length of the gap.

The invention belongs to the field of membrane separation, and provides a conductive nanofiltration membrane, a roll type conductive membrane filter element and a nanofiltration separation method.The conductive nanofiltration membrane comprises a substrate layer, a conductive layer and a separation layer and is prepared through a two-step vacuum filtration process and a vacuum filtration assisted in-situ interfacial polymerization method; meanwhile, good conductivity and selective separation capability are realized. In addition, the invention also provides a roll-type conductive membrane filter element based on the conductive nanofiltration membrane, and the roll-type conductive membrane filter element comprises the conductive nanofiltration membrane, a central conduit with a plurality of side holes, a water production diversion separation net, a water inlet diversion separation net, a counter electrode conductive layer, a conductive connector lug and a metal sheet (used for power connection), the roll type conductive membrane filter element can dynamically regulate and enhance the separation performance of charged molecules, ions and the like under the action of an electric field, and has the characteristics of simple structure, easiness in operation and amplification and adjustable and controllable membrane performance.

The invention relates to the field of metal cutting, in particular to a metal shearing machine tool and a using method thereof. A metal shearing machine tool comprises two sets of T-shaped seats, first rotating shafts are rotationally connected to the T-shaped seats, first circle shears are fixed to the ends of the first rotating shafts, cylindrical tables are arranged on the outer sides of the first circle shears, n-shaped frames are vertically connected to the T-shaped seats in a sliding mode, second rotating shafts are rotationally connected to the upper portions of the n-shaped frames, and second circle shears are fixed to the ends of the second rotating shafts. The second disc shear is located above the cylindrical table. The using method comprises the steps that S1, a metal sheet is put on the upper side of the cross beam, and the two hand moving seats are adjusted to make contact with the two edges of the metal sheet correspondingly; s2, the two pressing wheels are made to press the front edge and the rear edge of the metal skin correspondingly; s3, the two edges of the metal skin are pushed to enter the space between the first circle shear and the second circle shear; and S4, through synchronous rotation of the second disc shear and the rubber wheel, the rubber wheel continuously drives the metal skin to move.