88results about How to "Smooth corners" patented technology

An inspection robot comprises a supporting frame body, a driving mechanism and a guiding wheel mechanism closely stuck to the orbital wall, wherein the driving mechanism comprises a driving device with adjustable actuating speed, a differential mechanism and at least two groups of marching wheels. The driving device is connected with the differential mechanism in a transmission mode, the differential mechanism is arranged between the marching wheels and is connected with the marching wheels in a transmission mode, and the driving device, the differential mechanism and the marching wheels are all arranged on the supporting frame body respectively. The guiding wheel mechanism closely stuck to the orbital wall comprises at least two groups of guiding wheel components which are arranged on the supporting frame body. According to the inspection robot, the driving device drives the differential mechanism and the differential mechanism drives the marching wheel so that multi-driving can be achieved, uphill slipping and difficulty in repeated positioning can be avoided, braking performance can be improved and turning capability can be improved, and the guiding wheel mechanism is closely stuck to the orbit so that waggle in the robot can be avoided, shock absorption and cushioning function which absorb goggling and shaking of the robot caused by unflatness of the orbital wall can be achieved, and stability and security in the operation of the inspection robot can be improved.

A silicon substrate for magnetic recording medium is provided, which, even though it is a silicon substrate of a fragile material, is not prone to chip on the substrate edge faces or cracks on the substrate, and which prevents debris from being produced from the substrate edge faces, and which prevents debris from being produced by rubbing against a process cassette. Therefore, in a silicon substrate for a magnetic recording medium, in which there is provided a chamfer section between a main surface of the substrate and an edge face, the edge face and chamfer section of the substrate are of mirror finish, and a curved surface with a radius of greater than or equal to 0.01 mm and less than 0.3 mm is interposed between the main surface of the substrate and the chamfer section. In forming the curved surface, a silicon substrate stack with a plurality of silicon substrates and spacers laminated is prepared, and the inner periphery of a central hole of the substrates, and an outer periphery of the substrates are brush polished.

The invention is directed to a motorized cart and a hub gear motor system in which the electric motor of the system is contained within the hub casing of a front wheel of the motorized cart. The hub gear motor system provides the motorized cart with front wheel drive.

The invention provides an amphibious air cushion shipway point guidance control method, which comprises the following steps of (1) measuring current position information of an air cushion ship, heading of the ship, rotating rate and rolling attitude information; (2) combining a current position and a target position of the air cushion ship, and setting a way point;(3) calculating a guide point PLOS (xlos, ylos) of ship trajectory tracking through integrating a way point coordinate (xk, yk) and the current position (x(t), y(t)) of the air cushion ship by an LOS guidance system;(4) calculating an expected heading angle psi d according to the current position of the air cushion ship and a guide point coordinate, comparing the expected heading angle psi d with a current heading angle psi of the air cushion ship, and regarding a difference delta psi being equal to subtract psi d from psi as input of a PID controller; (5) controlling the air cushion ship to sail toward the guide point through the PID controller; (6) switching. According to the amphibious air cushion ship way point guidance control method provided by the invention, the ship trajectory control of the amphibious air cushion ship is realized, the work intensity and the mental burden of a driver can be reduced, and the stability and the safety in sailing of the amphibious air cushion ship are improved.

The invention belongs to the field of aircraft engineering, and provides a nose-wheel steering system of an aircraft. According to the nose-wheel steering system, a steering control box is connected with an instruction sensor, a combined hydraulic valve and a feedback sensor through cables; one end of the instruction sensor is fixedly arranged below a floor of a cockpit of the aircraft by using bolts, and the other end of the instruction sensor is hinged to a foot pedal through bolts; the combined hydraulic valve is fixedly arranged on a bulkhead plate of a nose landing gear through bolts; the feedback sensor is arranged on a steering actuator; one end of the feedback sensor is fixedly arranged on a steering actuator shell through a hoop, and the other end of the feedback sensor is connected with a piston rod of the steering actuator through a clamping piece; the steering actuator is arranged on the nose landing gear of the aircraft; a piston rod of the steering actuator is hinged to a rotary sleeve of the nose landing gear through a joint bearing and a bolt. The nose-wheel steering system of the aircraft is used for steering at a low-speed stage and swing prevention at a high-speed stage during sliding of the aircraft, and has good operation flexibility and anti-swing stability.

The invention discloses an edging and bending die for a refrigerator door panel. The edging and bending die comprises an upper die plate and a lower die plate. A material pressing plate is arranged in the middle of the upper die plate and provided with a discharging mechanism. A material supporting plate is arranged on the lower die plate, and two bending mechanisms are fixed to the positions, at the two sides of the material pressing plate, of the upper die plate. According to the edging and bending die for the refrigerator door panel, due to the fact that shaping wheels used for fast bending a refrigerator door and a rolling shaping shaft are adopted, the surface of the refrigerator door panel is prevented from being pulled to be damaged in the bending process, the shaping wheels at the two sides of the shaping shaft enable the bevel ends of the refrigerator door to form flat wrap angles, and therefore the wrap corners of the refrigerator door panel are flat and the wrap corners can prevent the refrigerator door from deforming after being shaped. Due to the fact that a pressure assembly exerts pressure on the shaping shaft, the forming speed of the die is improved, and meanwhile the shaping shaft is prevented from being scrapped due to bending and deforming after long-time use. The matching position of the pressure mechanism and the shaping shaft is provided with a rolling pressure rolling shaft, the sliding friction between the shaping shaft and the pressure assembly is converted into rolling friction, abrasion of the shaping shaft is further reduced, and the quality of the formed refrigerator door panel is further improved.

The invention belongs to the technical field of double-row wheels for trucks, and in particular relates to a stable double-row wheel for trucks based on friction limit, which includes a second wheel rim, a second planetary wheel, a second fixed shaft, a third fixed shaft, a second Sun gear, trigger mechanism, etc.; the function that the inner surface of the second fixed ring is installed on the outer surface of the input shaft in the present invention is to facilitate the fixed installation of the first fixed ring; the function of the first fixed ring nested on the outer surface of the input shaft It is convenient to fix and install the first T-shaped ring; the inner surface of the first T-shaped ring is installed on the outer surface of the first fixed ring to cooperate with the first T-shaped ring groove on the first rim, so as to achieve the purpose of fixing the first The role of the rim; the first rim is installed through the cooperation of the first T-shaped ring and the first T-shaped ring groove to facilitate the installation of the first tire; the double-row wheel of the truck in the present invention can realize The purpose of the automatic differential, so that the double-row wheels of the truck are more stable when turning.

The invention discloses a method for acquiring the moving body bank to turn (BTT) turning control attitude information and a device for realizing the method, which belong to the fields of moving body dynamics, control and navigation. A moving body navigates in the water environment at the navigation speed of over 100m / s; and the method for acquiring the moving body BTT turning control attitude information comprises the steps of: firstly, extracting the movement attitude information of the moving body; then, acquiring the moving body BTT turning control attitude information, through decoupling and classifying the moving body BTT turning control attitude information, decomposing the BTT control information into the rolling channel attitude information and the pitching-yawing channel attitude information; and respectively estimating the hydrodynamic coefficients in the rolling channel attitude information and the pitching-yawing channel attitude information, and obtaining the complete moving body BTT turning control attitude information. The method can be used for enabling the moving body to stably turn at the navigation speed of over 100m / s in the water navigation environment, so an air curtain which wraps the moving body is kept stable.

A disposable food packaging ideal for use in feeding an infant or child, the packaging having rounded corners to permit easy insertion and removal from a crowded, diaper bag, purse, or other crowded carrying environment. Additionally, the packaging is contoured for easy handling and use. Further, the smooth corners minimize the risk of scratching an infant or child when the contents are expressed into mouth of the consumer.

The invention discloses a four-way movable forklift based on a rotatable workbench structure. The four-way movable forklift comprises a chassis and an operating platform above the chassis. A rotatable workbench is arranged between the chassis and the operating platform and comprises a rotary power mechanism and a rolling bearing rotary bearing mechanism. The rotary power mechanism is fixedly connected with the operating platform. The rolling bearing rotary bearing mechanism is connected with the rotary power mechanism in a matched mode. The rotary power mechanism drives the rolling bearing rotary bearing mechanism to rotate. According to the four-way movable forklift based on the rotatable workbench structure, the movement direction of the forklift can be made not to be limited by rectangular cargos; swerving of the forklift loaded with the cargos is more convenient and stable; meanwhile, the space waste caused by the swerving radius of a traditional forklift is reduced, so that the space utilization rate of a warehouse is higher; and the four-way movable forklift is simple in structure and high in safety and practicability.

The invention discloses a turning robot and a turning method; the turning robot comprises a machine rack; four corners of the machine rack are respectively provided with one leg; each leg has three swing degrees of freedom, respectively being side-sway hip joints, forward swing hip joints and forward swing knee joints; the two side-sway hip joints in the front are welded in the front end of the machine rack through a side-sway support I; the two side-sway hip joints in the rear are welded in the rear end of the machine rack through a side-sway support II; the swing direction of each side-sway hip joint is controlled by a side-sway hydraulic cylinder; one end of the side-sway hydraulic cylinder is connected with the side-sway support I or II, and the other end is connected with the side-sway hip joint; the swing direction of the forward swing hip joint is controlled by a forward swing hydraulic cylinder; one end of the forward swing hydraulic cylinder is connected on the side-sway hip joint, and the other end is connected on the thigh; the forward swing hydraulic cylinder can telescope so as to realize forward swing motions of the thighs; the forward swing motions of the knee joint is controlled by a knee hydraulic cylinder; the robot shank comprises a shank hydraulic cylinder, and the shank length can be controlled to telescope.

The invention relates to the technical field of treatment performed after lightweight steel structure connecting pieces are cut off, and discloses an edge and corner grinding device for the light steel structure connecting pieces. The edge and corner grinding device for the light steel structure connecting pieces comprises a device bottom box, a conveying roller is fixedly arranged at the top of the device bottom box, two open grooves are formed in the top of the device bottom box, fixing plates are arranged in the open grooves, moreover, the two fixing plates are parallel to each other, rollers are arranged on the fixing plates, a sliding rod is movably connected between the bottoms of the side surfaces of the two fixing plates, the two ends of the sliding rod penetrate through the side surfaces of the fixing plates correspondingly and are fixedly connected with the front inner wall and the rear inner wall of the device bottom box, a two-way screw is connected between the bottoms of the side surfaces of the two fixing plates in a threaded mode, one end of the two-way screw penetrates through the side surfaces of the fixing plates to be rotationally connected with the front inner wall and the rear inner wall of the device bottom box. According to the edge and corner grinding device for the light steel structure connecting pieces, the problems that after the light steel structure connecting pieces are cut off, the hand is prone to be cut and hurt during mounting, moreover, an existing device capable of performing deburring grinding is held by the hand for grinding, so that the efficiency is low, and the safety is not high are solved.

The invention relates to a circularly polarized micro-strip antenna adopting a wave-shaped groove structure, which is used for reducing the size of the antenna, expanding application occasions, reducing the processing cost and meeting the demands of the antenna. The micro-strip antenna adopts a coaxial feed structure and comprises a dielectric substrate, a metal floor and a metal patch with a groove structure, wherein the metal patch is positioned on the upper surface of the dielectric substrate, the groove structure comprises eight wave-shaped grooves and four square connecting grooves, two wave-shaped grooves which are in mutual mirroring and in one group are selected from the eight wave-shaped grooves as the standard, the other six wave-shaped grooves can be obtained by rotating the group of wave-shaped grooves which are in the mutual mirroring around the central position of the metal patch 90 degrees, 180 degrees and 270 degrees, and the four square connecting grooves are used for connecting the two wave-shaped grooves which are adjacent but not in mirroring. The circularly polarized micro-strip antenna has the advantages of reduced size and lowered processing cost.

The invention discloses a rotating guiding wheel set guiding type track robot base plate. A base plate body, four rapid dismounting hanging loading mechanisms, at least two drive mechanisms and two guiding mechanisms are included. The four rapid dismounting hanging loading mechanisms are arranged on the left side and the right side of the base plate body in a paired opposite manner and are kept tomake rolling contact with or disengage from the upper surface of a track through changing of front end elevation angles. The drive mechanisms are in driving connection with the two rapid dismountinghanging loading mechanisms oppositely arranged on the two sides of the base plate body and are used for providing driving force. The two guiding mechanisms are rotationally arranged at the front end and the rear end of the base plate body correspondingly, and each guiding mechanism is in rolling contact with the left side face and the right side face of the track. The rotating guiding wheel set guiding type track robot base plate is ingenious in structure, moving and turning are stable, dismounting and mounting are rapid, and transporting and maintaining are convenient.

A fitted mattress covering for a mattress includes lower edge portions, which may be inverted J-shaped portions, mirror-image inverted J-shaped portions, portions that terminate at an end, or inverted U-shaped portions. The covering side and end portion lower edges may join one another to form a continuous lower edge of the covering. For the J-shaped portion, an elastic binding may be disposed under a downwards folded portion. The elastic binding may extend at least partially along the length of the lower edge of the covering. An elastic band may be disposed at each corner of the covering and extend diagonally across the associated corner and have opposite ends secured adjacent one of the side portions and adjacent one of the adjacent end portions, respectively. The bands may be secured in place by stitching and / or by supplementary securing means to ensure that the bands do not pull away from the covering.

The invention discloses a bipedal walking robot based on a parallel mechanism. The bipedal walking robot comprises a waist platform and two leg part mechanisms symmetrically arranged and connected tothe lower side of the waist platform. Each leg part mechanism comprises an upper platform, a lower platform and three telescopic cylinders hinged between the upper platform and the lower platform through universal joints, and the bipedal walking robot further comprises a steering mechanism installed on the waist platform and a sole mechanism installed at the bottom of each leg part mechanism. According to the bipedal walking robot based on the parallel mechanism, a single-degree-of-freedom waist part is used for driving a motor to drive two three-degree-of-freedom leg part mechanisms based ona parallel structure, so that under the situation that two legs are only provided with four degrees of freedom in total, the robot can realize the functions of straight running, turning, obstacle-crossing and walking up and down stairs stably; and compared with existing six-degree-of-freedom robots, the design structure of the robot is simpler, a workspace is large, and the payload to deadweight ratio is high.

The invention provides a laser engraving technique of a decorative sheet. The laser engraving technique comprises the following steps that patterns are scanned by a scanner and transmitted to a computer to be stored; according to the scanned patterns, required patterns are designed through graphic software on the computer; pattern information data in the computer are transmitted to a laser engraving machine; a drive program corresponding to the steps is edited and stored in a numerical control system of the laser engraving machine; a laser beam is positioned on the laser engraving machine, time is set according to the depths of the required patterns, a plastic sheet raw material is placed on a laser platform and subjected to laser engraving, and layered machining is conducted; and surface cleaning treatment is conducted on the plastic decorative sheet subjected to laser engraving, and detection and shaping are conducted. According to the laser engraving technique, the defects that in the prior art, when pressing is conducted through a medal mold, the cost is high, and the pattern transformation cycle is long are overcome; and by the adoption of laser engraving, the patterns and characters with the concave sense are uniform, delicate and natural, the edges and corners are smooth, the stereoscopic impression is higher, personality and fashionability are achieved, and a leather imitation effect is achieved when the decorative sheet is applied to automobile inner decoration panels and electronic product shells.

The invention relates to a method and equipment for removing and purifying oily fume, which is composed of one or more cyclone separation pipes, fans, inner cylinders, outer cylinders, partitions, fume hoods, rolling shutters and oil collection cups. Among them, the cyclone separation pipe has two or more symmetrical inlets and is vertically installed in the inner cylinder. The separator, the outer wall and the inner cylinder of the cyclone separation tube form an oil fume annular tornado suction channel. The fan is installed on the top of the cyclone separation tube. The inlet of the fan is connected with the outlet of the cyclone separation pipe. The lower part of the cyclone separation pipe stretches out to the bottom of the smoke hood, and the oil discharge port at the bottom is covered with an oil collecting cup. The present invention is based on the aerodynamic design, so that the oil fume flows smoothly, the resistance is small, the suction and purification efficiency is high, and the medium-free separation is adopted, never blocked, and the high-efficiency work of the range hood can be continuously ensured.

The invention discloses a pipe diameter self-adaptive pipeline detection robot which comprises a main body rack, walking mechanisms, a reducing mechanism, a detection mechanism and a driving mechanism. The number of the walking mechanisms is at least three, and each walking mechanism comprises a crawler belt, a baffle and a connecting rod set. The reducing mechanism comprises a spring supporting rod, a nut frame, a polished rod and a lead screw, one end of the spring supporting rod is hinged to the middle end of the connecting rod, and the other end of the spring supporting rod is hinged to the nut frame; and the spring supporting rod is arranged in the circumferential direction of the nut frame. The detection mechanism comprises a stay wire sensor, a laser sensor and a gyroscope, and the laser sensor and the gyroscope are arranged at the front end of the main body rack and used for scanning and detecting the outline of the inner wall of a pipeline. The driving mechanism comprises a synchronous belt wheel, a driving wheel, a stepping motor and supporting plates, the supporting plates are symmetrically arranged, the synchronous belt wheel and the driving wheel are arranged at the front ends and the rear ends of the supporting plate, the driving wheel is connected with an output shaft of the stepping motor through a transmission gear, and the baffle is fixed to the supporting plates through bolts.

The invention provides a bus with an idler gear mechanism, comprising a power car and a tractor, wherein the power car and the tractor are connected through an articulated shaft; first track wheel mechanisms are arranged at the bottom of the power car and the tractor, and two sets of second track wheel mechanisms are arranged between the two sets of the first track wheel mechanisms; and the frontand rear frames are adopted and the hydraulic steering system is cooperated to realize flexible steering on the highway. The bus with an idler gear mechanism has the advantages that: the bus with an idler gear mechanism can ensure that no traveling resistance will be generated during the turning process of the high-speed railway car, and allows for smaller corners; the first track wheel mechanismsand the second track wheel mechanisms are respectively arranged at the bottom of the power car and the tractor; and the second track wheel mechanisms are positioned between the first track wheel mechanisms, thereby reducing the span distance between the track wheels, and making the highway car more stable and safe in the turning process.

The invention belongs to the technical field of wagon double-row wheels, and particularly relates to a stable type wagon double-row wheel based on gear limiting. The stable type wagon double-row wheelcomprises a second wheel rim, a second planet wheel, a second fixing shaft, a second sun wheel, a second tire, a first tire, an input shaft, a second T-shaped ring, a first planet wheel, a first wheel rim, a brake drum, a first fixing ring and the like. According to the stable type wagon double-row wheel based on gear limiting, the inner circular surface of a second fixing ring is mounted on theouter circular surface of the input shaft for facilitating fixed mounting of the first fixing ring; the first fixing ring is nested in the outer circular surface of the input shaft for facilitating fixed mounting of a first T-shaped ring; the inner circular surface of the first T-shaped ring is mounted on the outer circular surface of the first fixing ring for being matched with a first T-shaped ring groove in the first wheel rim, so that the effect of fixing the first wheel rim is achieved. According to the stable type wagon double-row wheel based on gear limiting, during turning of a wagon,the purpose of the automatic differential speed can be achieved, so that the wagon double-row wheel is more stable during turning.

The invention relates to a modified-atmosphere packaging and fresh keeping method suitable for storage and transportation of fresh sweet cherries. The characteristic that sweet cherries can resistanthigh-concentration CO2 is adopted, the fresh sweet cherries are precooled, then the precooled fresh sweet cherries are placed in a modified-atmosphere packaging bag for sealing, and storage, transportation or direct sales under the condition of minus 1 to 1 DEG C and relative humidity being 90-95% are performed. Under the condition of being free from inflation, CO2 generated in the respiration process of fruits is used, so that a good effect can be achieved, and favorable storage quality of the sweet cherries can be maintained. The storage period of the sweet cherry fruits can be effectively prolonged by 2-5 days, the problem of fresh keeping of the sweet cherry fruits is solved, and the commodity value of the sweet cherries can be increased.

The invention discloses a high borosilicate glass product girdling device which comprises a machine body, a cutting mechanism, an adjusting mechanism, a lifting mechanism and positioning mechanisms. The machine body comprises a workbench, a shell arranged above the workbench and a plurality of transmission holes formed in the workbench. The cutting mechanism comprises a first motor fixedly installed on the shell, a transmission frame fixedly connected to the output end of the first motor, a gear ring fixedly connected to the bottom of the transmission frame, a plurality of transmission shafts rotationally installed at the bottom of the shell, gears fixedly connected to the top ends of the transmission shafts and in meshing transmission with the gear ring, a connecting box fixedly connected to the bottom end of the transmission shafts, and a cutting knife arranged at the bottom of the connecting box; and the bottom end of the transmission shaft extends to the position below the shell and used for adjusting the height of the cutting mechanism, the lifting mechanism is located in the shell and used for lifting and fixing materials, and the positioning mechanisms are arranged on the two sides of the workbench and used for positioning the materials. Dangerous caused by manual cutting can be avoided, and multi-station machining is achieved through the single first motor.

The invention relates to a coach chassis with low floor and belongs to the technical field of car chassis structure. The coach chassis with low floor is characterized in that a cross beam of a chassis frame crosses over a back-bridge shockproof suspension system and a front-bridge shockproof suspension system, the chassis frame is a fully-integral girder chassis frame, the lower end of the back-bridge shockproof suspension system is connected with a trailer of shockproof suspension systems, and the upper end is fixed with the cross beam of the chassis frame; the upper end of the front-bridge shockproof suspension system is fixed with the cross beam of the chassis frame, and the lower end is connected with a front bridge; a first-level step and a floor of a coach carriage are positioned on the same plane, and the rear of the front bridge is taken as a front door entry. The fully-integral girder chassis frame with ultra-low floor of the invention leads the front door to be arranged in the rear of the front bridge and the first-level step and the floor of the coach carriage to be positioned on the same plane, thus improving travelling comfort; the chassis has simple assembly, convenient disassembly and maintenance; the invention has low gravity center, good operation performance and high safety coefficient, as well as driving smoothness, good shockproof effect and long service life.

The invention relates to a track turnout system. The track turnout system comprises a diverter, a straight-going track, a turning track, a first guide wheel and a second guide wheel; the turning trackis placed on one side of the straight-going track; one end of the turning track is intersected on the straight-going track; the diverter is positioned in front of the intersecting part of the straight-going track and the turning track; the first guide wheel and the second guide wheel are correspondingly placed on the two sides of a central axis of the lower end of the front part of a rail vehiclerunning on the straight-going track or the turning track; a first guide surface is arranged on the left side of the diverter; a second guide surface is arranged on the right side of the diverter; theright end wheel edge of the first guide wheel has a rolling guiding effect on the first guide surface to guide the rail vehicle to run along the straight-going track; the left end wheel edge of the second guide wheel has a rolling guiding effect on the second guide surface to guide the rail vehicle to be changed from the straight-going track to the turning track; and at any time, there is one andonly one guide wheel acting upon the first guide surface and the second guide surface. The track turnout system can be used for enabling the rail vehicle to simultaneously pass in two directions without changing the shape of a turnout.

The invention discloses an electric trolley device for a straight track or an arc track. The electric trolley device comprises the track, a mounting bottom plate, a driving motor connected with the mounting bottom plate, a speed reducer connected with the driving motor, a transmission belt arranged on the track, a transmission gear meshing with the transmission belt, two rotating plates arranged at the upper end of the mounting bottom plate, travelling wheels and a transmission mechanism. The two rotating plates are each connected with the mounting bottom plate through a rotating shaft. The rotating shafts and the rotating plates as well as the rotating shafts and the mounting bottom plate are connected through bearings correspondingly. Each rotating plate is symmetrically provided with the two travelling wheels which are symmetrically arranged at the two ends of the track. The travelling wheels are connected to the mounting bottom plate through first brackets and can travel on the track in a rolling mode. The transmission mechanism comprises a driving transmission mechanism body and a driven transmission mechanism body. The driving transmission mechanism body is connected with thespeed reducer, and the driven transmission mechanism body is connected with the rotating shafts. The upper ends of the rotating shafts are connected with the transmission gear. A track trolley of theelectric trolley device can operate stably on the bent track.

The invention discloses a body structure GaAs photoconductive switch based on a graphene interface layer and a preparation process of the body structure GaAs photoconductive switch. A cathode contactelectrode is arranged on the lower surface of a GaAs substrate, an anode contact electrode is arranged on the upper surface of the GaAs substrate, a graphene layer is arranged between the anode contact electrode and the GaAs substrate, the external electrode is arranged on the upper surface of the anode contact electrode, a light receiving hole penetrates through the external electrode and the anode contact electrode, the upper surface of the GaAs substrate is further covered with a passivation layer, and the anode contact electrode sequentially comprises a Ni layer, a Ge layer, an Au layer, aNi layer and an Au layer from bottom to top. At present, most photoconductive switches are manufactured according to the principle of forming ohmic contact around gallium arsenide and multi-layer metal. However, a switching device faces the phenomena of short service life, uneven heat dissipation, easy burnout and the like, high-quality graphene is transferred to a target substrate, and then thesurface of the target substrate is plated with metal to form a gallium arsenide-graphene-metal composite structure, which plays a great role in heat dissipation and service life of the device.

The invention relates to a screw-thread-hidden ball production process. The process comprises the following steps: designing; separating colors; developing a film; batching; designing a cutting die; cutting pieces; distributing materials; blending printing ink; printing; stitching; overturning a ball; filling a liner; sewing; shaping; carrying out gas testing; and packaging. The scheme provided by the invention is simple; stitching threads are hidden through adopting a screw-thread-hidden technology; and meanwhile, a multilayered combination is adopted so that the product is relatively durable.