118results about How to "Same intensity" patented technology

The invention discloses a laser welding method for butting two pieces of metal sheets, comprising the following steps: determining the size of facula according to the metal sheets; selecting a corresponding laser welding device and determining welding height according to the size of the facula; closely arranging a first welding guide plate at the initiating end of an abutment joint of the two pieces of metal sheets and arranging a second welding guide plate at the tail end of the abutment joint; with certain welding frequency, single welding energy and certain welding movement speed, carrying out movement and laser release from the first welding position of the first welding guide plate to the second welding position of the second welding guide plate along the abutment joint. The method of the invention ensures the same welding strength at the initial end and other positions of the welding lines, improves welding quality and increases welding strength. The welding lines welded by the method of the invention maintain the same strength property as the parent metal after a plurality times of distortion and tearing, thus having no weak spots in terms of strength.

The invention relates to putty powder, in particular to functional diatomite putty powder and a preparation method thereof, wherein the putty powder includes in percent by weight: 10-50% of high-temperature activated diatomite, 5-30% of an inorganic binder, 30-70% of an inorganic filler, 0.01-2% of a functional aid, 0.1-5% of an inorganic pigment, 0.5-5% of an organic binder, and 0.5-5% of an organic aid. The functional diatomite putty powder meets the related standard requirements of putty powder and diatomite, and has qualified constructability and functionality, namely having standard-meeting properties such as humidity regulation, formaldehyde clarifying performance, long duration of formaldehyde purifying performance, mold-proof performance, and mold durability.

The invention provides a magnetic domain controlling structure wherein a lamination stack M1 adjacent to a magnetoresistive stack of a GMR, CPP-GMR or TMR magnetic head has at least two magnetic films 14 and 16 anti-ferromagnetically coupled through a non-magnetic film 15, or the lamination stack M2 disposed on the end portions of the free layer of the magnetoresistive stack of the GMR magnetic head has a magnetic layer anti-ferromagnetically coupled to the free layer 2 through the non-magnetic film 27. Ferromagnetic film deposition dead zone area problems and the consequent problem of film rippling in free layer portions that reduces element sensitivity are prevented, as is the problem of increased error from read drift in the magnetic field exchange coupling method, resulting in a highly stable, highly sensitive MR head with no loss of magnetic field intensity.

The invention provides a high-pressure-head low-flow non-isolated online cleaning device for a rotary air preheater.The device comprises a steam heating device, an electric heating device, a water tank, an agentia adding device, a high-pressure water pump and a soot blower, wherein the water tank, the agentia adding device, the high-pressure water pump and the soot blower are sequentially connected, and the steam heating device and the electric heating device are both arranged in the water tank.The device is simple in structure, convenient to implement, small in influence on unit operation, and capable of efficiently cleaning a heat exchanging element of the rotary air preheater under the online non-isolated condition.

The invention relates to a vertical hoop stress cement dipping wet method glass-reinforced plastic pipe continuous compaction machine. It includes core axle, base, power drive, vertical yarn rack, vertical yarn dip bath, and distributor. The power drive is set on the seat. There are many sets of vertical yarn rack, vertical yarn dip bath, and distributor. Its features are that many sets of hoop stress cement dipping yarn racks and hoop stress yarn dip baths are set on the seat; the hoop stress cement dipping yarn rack is connected to the power drive, and drove to rotate by it; the hoop stress cement dipping yarn rack has an internal cylinder, and circle yarn rack is set on it; the hoop stress cement dipping yarn rack also set a yarn guiding device, and it has a yarn guiding rack; and the guiding yarn rack is set many yarn guiding wheels and cradles. Its advantages are that both the vertical and hoop stress are cement dipping, this can fundamentally prevent the cement from dipping deficiently; and each of the hoop stress spiral wrapping layer is reverse superposition alternately; the vertical hoop stress yarn layer are alternately overlapped, so that the density and the mechanical strength of the glass-reinforced plastic pipe are greatly improved.

The invention discloses an LED chip with DBR insulation protection and uniform light emitting and a manufacturing method thereof. The chip comprises a substrate, a light-emitting structure arranged onthe front face of the substrate, a first DBR reflecting layer arranged on the light-emitting structure, and a second DBR reflecting layer arranged on the back face of the substrate. The first DBR reflecting layer is of a single-pile structure, and the second DBR reflecting layer is of a multi-pile structure; after light emitted by the light-emitting structure is reflected by the first DBR reflecting layer and the second DBR reflecting layer, the forward light-emitting intensity and the lateral light-emitting intensity of the chip tend to be the same. Through the mutual cooperation of the first DBR reflecting layer and the second DBR reflecting layer, the upward and downward light emission of the chip is reduced, and the lateral light emission of the chip is increased, so forward and lateral light emission intensities of the chip tend to be the same. Moreover, the first DBR reflecting layer covers the front surface of the light-emitting structure and can also be used as a protective layer, so a silicon oxide insulating layer deposition process is omitted, the process time is shortened, and the manufacturing cost is saved.

When carrying out pulse laser welding over JISA3000 aluminium alloy plate for a cell box, the abnormal part (irregular weld pass) can be avoided. The aluminium alloy plate for a cell boxy comprises, by mass, 0.8 to 1.5% of Mn, 0.05 to 0.2% of Cu, 0.05 to 0.6% of Si, and 0.05 to 0.7% of Fe. According to the requirement, by mass, Zn is below 0.05%, Ti below 0.04, and B below 10 ppm. The remains are constituted by A1 and some unavoidable impurity. Even when the penetration depth of the laser is over 0.25mm, the irregular weld pass can still be avoided.

The invention realizes the manufacturing of a composite sandwich structured nozzle by a dynamic pressurizing transient liquid phase diffusion welding method; the composite sandwich structured nozzle manufactured by the invention has advantages of long fatigue life, strong compression capacity, high welding rate, short manufacturing cycle, no blocking in the passageway and the like. The composite sandwich structured nozzle between materials of the same type can be manufactured by utilizing the invention, and the composite sandwich structured nozzle between materials of different types can also be manufactured, thus providing composite sandwich structured nozzle products with good performance for related industries.

The invention discloses a high performance motorcycle engine powder metallurgy gear cam. The high performance motorcycle engine powder metallurgy gear cam comprising a body made by powder metallurgy for entire structure comprises a bearing journal, a shaft gear, a drive gear mounting journal and drive gears which are located in the same axle and which are arrayed sequentially. The tooth roots of adjacent drive gears are in fillet transition. The outer wall of the bearing journal, the outer wall of the shift gear, the outer wall of the drive gear mounting journal and the outer walls of the drive gears are provided with wear resistant composite layers. According to a preferable technical scheme, the wear resistant composite layers are rare earth compound composite layers. The invention further discloses a manufacturing method of the high performance motorcycle engine powder metallurgy gear cam. The method includes blending, mixing, pressing, sintering, heating, hot forging, finishing and chemical infiltrating procedures. Material utilization rate is high, strength, fatigue resistance and other mechanical properties of the motorcycle engine gear cam can be guaranteed, wear resistance can be guaranteed, and the problem of stress concentration of the tooth roots of the drive gears can be solved.

The invention relates to an assembling and clamping device for tube sheet processing. According to existing tube sheet processing equipment, even if the same set of workpieces are processed, the workpieces still need to be assembled, clamped and aligned again during each processing process, and accordingly the problems of low processing precision and low processing efficiency are caused. According to the assembling and clamping device for tube sheet processing, a set of radial T-shaped grooves A (2) and radial T-shaped grooves B (3) are evenly formed in the upper surface of a disc worktable (1) in the circumferential direction, and an annular groove (4) is formed in the side, close to the outer edge, of the disc worktable (1) in the circumferential direction; sliders A (5) are arranged in the T-shaped grooves A (2) in a sliding mode, the top of each slider A (5) is connected with a double-thread screw A (6) in a screwed mode, and each double-thread screw A (6) is sleeved with a positioning cylinder (7) in a penetrating mode; the interior of each T-shaped groove B (3) is sequentially provided with an equal-height sliding cushion block (9) and a slider B (10) in a sliding mode, the top of each slider B (10) is connected with a double-thread screw B (11) in a screwed mode, each double-thread screw B (11) is sleeved with a pressing plate (12), one end of each pressing plate (12) is located above the corresponding equal-height sliding cushion block (9) and is opposite to the corresponding equal-height sliding cushion block (9), and the other end of each pressing plate (12) is supported on the upper surface of the disc worktable (1) through a cushion block (14).

The invention relates to an overspeed detection hyperspectral imaging technique, and provides a Fourier transform hyperspectral imaging device based on a high-speed double reflection rotating mirror to solve the problem of nonlinearity caused by an optical path difference of a high-speed rotating mirror transmission type interference spectrometer. The device comprises a collimating mirror, a beamsplitting mirror, a first reflecting mirror, a second reflecting mirror, a first hollow retro-reflector, a second hollow retro-reflector, a detector and the double reflection rotating mirror. Incidentlight is incident on a beam splitter and is divided into reflected light and transmitted light. The reflected light enters the first hollow retro-reflector after being reflected by the first reflecting mirror and the double reflection rotating mirror. Then the reflected light returns back to the double reflection rotating mirror at 180 degrees, and is then reflected to the beam splitter by the double reflection rotating mirror and the first reflecting mirror. The transmitted light enters the second hollow retro-reflector after being reflected by the second reflecting mirror and the double reflection rotating mirror. Then the reflected light returns back to the double reflection rotating mirror at 180 degrees, and is then reflected to the beam splitter by the double reflection rotating mirror and the second reflecting mirror. The interference light generated by the reflected light and the transmitted light is received by the detector.

The invention discloses a scavenging tank of a large two-stroke, uniflow scavenging type internal combustion engine and the cylinder frames (30 and 30') disposed on a frame (2) of a crank case of the engine, the cylinder frames (30 and 30') have an upper plate (31) having at least one circular hole (39) to receive and support a cylinder liner (6). The cylinder frames (30 and 30') further have a first side wall (32) having at least one port (38) to pass the scavenging. The scavenging tank (4) is directly fitted to the cylinder frames with a slender cavity facing the cylinder frames.

The invention relates to a method for manufacturing light bullet-proof glass. The method is characterized by comprising the following steps of: processing raw material glass sheets and organic glass plates into products with required specifications, cleaning and drying; sequentially laminating a panel glass sheet, a polyurethane film, an organic glass plate, a polyurethane film and a back plate glass sheet so as to obtain a combination material; putting the combination material on a flat press for pre-pressing; and feeding the pre-pressed combination material into a still kettle for steaming so as to obtain the light bullet-proof glass. The polyurethane film with high toughness and high penetration resistance and the organic glass plate replace a middle glass layer of the conventional bullet-proof glass, so that the impact resistance and penetration resistance of the glass are enhanced, the weight and thickness of the bullet-proof glass are reduced effectively, cost is lowered and the overall dead weight can be reduced by about 20 percent; simultaneously, the rigidity and intensity of the inner and outer sides of the bullet-proof glass are kept the same as those of the conventional bullet-proof glass.

The invention discloses a novel energy-saving ball mill. The novel energy-saving ball mill consists of a first hydrostatic bearing, a second hydrostatic bearing, a rotator, hydrostatic bearing sealing covers, a local dust collector, a small gear and a transmission system; the shaft journals of hollow shafts at the two ends of the rotator are respectively placed on the first hydrostatic bearing and the second hydrostatic bearing and are covered by the two hydrostatic bearing sealing covers respectively; a large gear which is engaged with the small gear is arranged on the periphery of the rotator; high-pressure oil forms a lubricating oil film among the first hydrostatic bearing, the second hydrostatic bearing and the shaft journals of the hollow shafts of the rotator, so that the rotator can float, the completeness of the lubricating oil film can be guaranteed and the complete liquid lubrication can be realized; the bearing capacity of the bearings is large; when the rotator generates the small bending elastic deformation, bearing bodies of the first hydrostatic bearing and the second hydrostatic bearing rotate at a small angle relatively around respective first pin shafts, so that the thickness of the oil film is not changed basically; the grinding effect between a grinding medium and a mineral aggregate and among the mineral aggregates can be enhanced because of a corrugated liner plate in the rotator; and the sealing covers and the local dust collector can effectively prevent dust particles in the working environment of the ball mill from entering the working space of the hydrostatic bearings.

The invention relates to a real-time in situ picosecond laser pulse auto-correlation meter. An incident light diaphragm component, a reflection mirror and a beam splitter are sequentially fixed along the advancing direction of incident pulse laser. The incident pulse laser is split into a first beam of light and a second beam of light through the beam splitter. The first beam of light is reflected to a right angle prism through the beam splitter, is reflected to the beam splitter through the right angle prism, and finally is transmitted to a first lens through the beam splitter. The second beam of light is transmitted to a retroreflector through the beam splitter, is reflected to the beam splitter through the retroreflector, and finally is reflected to the first lens through the beam splitter. The first beam of light and the second beam of light converge at a frequency doubling crystal through the first lens to produce a second harmonic signal. The second harmonic signal sequentially passes through a filter, a second lens, a diaphragm and a photodiode detector to generate an electrical signal, and the electrical signal is collected by a master control system. The real-time in situ picosecond laser pulse auto-correlation meter provided by the invention has the advantages of simple structure, low cost, easy operation, easy setting up, easy debugging, wide application range, and can continuously change the time range of the measured laser pulse.

The invention relates to an electro-hydraulic brake system (1) for a motor vehicle, comprising a main brake cylinder (2) which can be actuated by a brake pedal (1a) for actuating wheel brakes (8, 9, 10, 11), a pressure generating device (5) which can be activated electronically, an additional brake actuator (50) which can be activated electronically, an open and closed-loop control unit (12), wherein in a normal mode of operation the open and closed-loop control unit (12) detects a requirement for braking on the basis of the actuation of the brake pedal (1a) by the driver and activates the pressure generating device (5) to build up braking torque on the wheel brakes (8, 9, 10, 11), wherein, if the pressure generating device (5) is not activated or cannot be activated, the driver gains direct access to the wheel brakes (8, 9, 10, 11) and the open and closed-loop control unit (12) controls the additional brake actuator (50) to build up braking torque, wherein as a backup the open and closed-loop control unit (12) monitors the brake pedal travel and, when a predetermined pedal travel threshold value (120) is reached, activates the additional brake actuator to build up braking torque,and wherein, in the event of a succession of brake pedal actuations by the driver, the pedal travel threshold value (120) is increased at least once. The invention further relates to a method for operating an electro-hydraulic brake system.

The invention relates to a method for generating a three-dimensional multi-focal spot array based on a spatial dipole array. Two high-numerical-aperture (NA) lenses are used for form a 4pai focusing system; a virtual spatial dipole array is arranged at a focal region of the4pai focusing system; the two high-NA lenses collect the all radiation field of the spatial dipole array completely from imagespace and then the radiation field is collimated to a pupil plane, and an inverse problem is solved to obtain electric field distribution on the pupil plane; and then field distribution on the pupilplane is regarded as an incident field and is transmitted to the focal region in a reverse direction and a three-dimensional multi-focal spot array with the predetermined characteristic is generated near the focal regions of the high-NA lenses. According to the invention, no tedious iterative optimization process is needed during generation of the three-dimensional multi-focal spot array by usingthe radiation field of the spatial dipole array; and each focal spot has the same appearance and intensity, the number of the focal spots is controllable and the positions and space of the focal spotsare customized.

The invention discloses a reconfigurable microwave photon notching filter, and belongs to the technical field of microwave photonics. The reconfigurable microwave photon notching filter is composed of a laser, a double-drive Mach-Zehnder strength modulator, an optical isolator, a vector network analyzer, a high nonlinear fiber, an intensity modulator, a first microwave signal source, a second microwave signal source, a double-parallel Mach-Zehnder strength modulator, a first DC stabilized voltage supply, a second DC stabilized voltage supply, a third DC stabilized voltage supply, a fourth DC stabilized voltage supply, a fifth DC stabilized voltage supply, an optical circulator and a photoelectric detector. The reconfigurable microwave photon notching filter disclosed by the invention is based on intensity modulation and the stimulated Brillouin scattering effect induced by pumping signals, a gain spectrum amplifies the intensity of an upper side band, so that the intensity of the corresponding position is the same, and the trapped wave output of the microwave photon filter is realized; and the number and the frequency of the pumping signals are changed to realize the reconfiguration of the number of trapped waves, the frequency of the trapped waves and the trapped wave spectral pattern.

The invention relates to a method for method for solution hardening of a cold deformed workpiece of a passive alloy containing at least 10% chromium, which method comprises -dissolving at least nitrogen in the workpiece at a temperature T1, which is higher than the solubility temperature for carbide and / or nitride and lower than the melting point of the passive alloy, wherein dissolution of nitrogen at temperature T1 is performed to obtain a diffusion depth in the range of 0 mum to 5 mm, and -cooling the workpiece after the dissolution step at temperature T1 to a temperature which is lower than the temperature at which carbides and / or nitrides form in the passive alloy, wherein the cooling step takes place in an inert gas not containing nitrogen. The invention further relates to a member, such as a lock washer for securing bolts or nuts prepared using the method.

The invention relates to the technical field of high-end equipment manufacturing, and discloses a part shape self-adaptive clamp in equipment manufacturing, which comprises a shell, clamping plates are fixedly connected to the left side and the right side of the upper part of the shell, and a closed cabin structure is arranged in the middle position in each clamping plate. Piezoresistors are arranged in the clamping plates and located below the closed cabin structure, a photoresistor is fixedly connected to the outer wall of the upper side of the middle of the shell, a pressure bearing structure is arranged outside one sides of the opposite faces of the clamping plates, a clamping feedback structure is arranged in one sides of the opposite faces of the clamping plates, and a clamping releasing structure is arranged on the outer wall of the upper side of each clamping plate. Whether a part needs to be clamped or not is judged through a photoresistor, an electroactive polymer expands to extrude a piston to enable a second leather bag to expand and adapt to the shape of the part, part clamping is more stable, the force is the same, the part cannot be damaged, and the second leather bag made of rubber is more antiskid and cannot scratch the part.

The invention discloses a novel energy-saving mixer-mill. The novel energy-saving mixer-mill consists of a first hydrostatic bearing, a second hydrostatic bearing, a rotator, hydrostatic bearing sealing covers, a first local dust collector, a second local dust collector, a first gear, a first transmission system, a second transmission system, a third gear, a fourth gear, a first rolling bearing, a support of the first rolling bearing, a second rolling bearing, a support of the second rolling bearing, and a crushing and grinding component, wherein the shaft journals of hollow shafts at the two ends of the rotator are respectively placed on the first hydrostatic bearing and the second hydrostatic bearing and are covered by the two hydrostatic bearing sealing covers respectively; the first gear is connected with an output shaft of the transmission system; the second gear is arranged at the left end of a cylinder in a penetrating way; the first gear is engaged with the second gear; the crushing and grinding component is arranged in the rotator in the penetrating way; cage stirring shafts at the two ends of the crushing and grinding component respectively penetrate from the hollow shafts at the two ends of the rotator; and the crushing and grinding component is driven to rotate by the second transmission system. When the novel energy-saving mixer-mill works, the rotator floats, and the complete liquid lubrication is realized; the grinding effects between a grinding medium and a mineral aggregate and amoing the mineral aggregates are enhanced because of a corrugated liner plate in the rotator; and the mineral aggregate can be ground quickly by the crushing and grinding component.

The invention provides a curved surface touch feedback touch screen and a touch feedback driving method thereof. The curved surface touch feedback touch screen comprises an insulating layer, a transparent conducting layer and a power module. The insulating layer is provided with a curved upper surface and a flat lower surface, and the upper surface is used as a touch plane. The transparent conducting layer is paved on the lower surface and is provided with a plurality of transparent electrodes. The power module outputs driving voltage to the transparent conducting layer to enable electric field intensity at different positions on the touch plane to be roughly same.

The invention provides a fruit picking device for agricultural picking. The device includes a moving block and a falling-fruit annular frame. The upper part of a top rod is rectangular, the top of thetop rod is provided with dovetail-shaped notches in the forward and backward directions, the middle of the top rod is provided with rectangular blind holes from top to bottom, and the bottom of the top rod is provided with a double-screw bolt. A bottom rod is in a cylindrical structure, the top of the bottom rod is provided with an external thread, the bottom rod is connected with the bottom sideof a middle rod through the thread, and the right end on the external round wall is provided with a cylindrical hole communicated with an inner hole of the bottom rod. There are two shear blades which are connected through rivets, the thickness of the shear blades is same as the width of a slide groove, the bottommost parts of the shear blades are provided with circular holes, and the holes of the bottom of the two shear blades are internally connected with hang rings respectively. The two shear blades are controlled through pull force for cutting and operate at the same time, the force is same, the shear force is constant, fruit stem ends can be easily cut, the edge slip phenomenon does not occur easily, the fruit picking effect is good, after a fixed net cover is additionally installedon the falling-fruit annular frame, a rail is formed for picked fruits and the fruits are prevented from being damaged after falling on the ground.

This invention relates to solid electrolyte capacitors and is intended to decrease the contact resistance between the body of the capacitor and lead frames and the internal resistance of these components. The invention provides a process for producing a solid electrolyte capacitor by forming a dielectric oxide film on an anode body of valve metal, forming a cathode layer of solid conductive substance on the oxide film to prepare a capacitor element, coating the cathode layer of the capacitor element with a carbon layer, coating the carbon layer with a silver paste layer to prepare a capacitor body, and bonding a lead frame to the silver paste layer of the. capacitor body with a silver adhesive. While the capacitor element coated with the carbon layer and a silver paste are being vibrated relative to each other, the capacitor element is dipped in the silver paste and withdrawn therefrom in the direction of the vibration, whereby the carbon layer is coated with the silver paste layer. The surface of the lead frame is partly or entirely formed with a high conductive layer of a material having a higher electric conductivity than the substrate of the lead frame, the high conductive layer extending from a connection to the capacitor body to a connection for an external circuit.

The invention discloses an energy-saving ball mill which consists of a first hydrostatic bearing, a second hydrostatic bearing, a rotating body, hydrostatic bearing sealing covers, a local dust collector, a pinion and a transmission system, wherein hollow shafts at two ends of the rotating body are respectively arranged on the first hydrostatic bearing and the second hydrostatic bearing and are respectively covered by the two hydrostatic bearing sealing covers; the periphery of the rotating body is provided with a gearwheel meshed with the pinion; high pressure oil forms a lubricating oil film among the first hydrostatic bearing, the second hydrostatic bearing and the shaft neck of the hollow shaft of the rotating body, the rotating body can float, the lubricating oil film can be kept complete, and the liquid lubrication is completely realized; the bearing has high bearing capacity; when the rotating body generates small elastic bending deformation, the bearing bodies of the first hydrostatic bearing and the second hydrostatic bearing relatively rotate by a small angle around first pin shafts respectively, so that the thickness of the oil film is basically invariable along the axial direction; according to the corrugated lining plate in the rotating body, the abrasive action between the abrasive medium and mineral aggregate and between the mineral aggregate is enhanced; and moreover, according to the sealing covers and the local dust collector, the dust particles in the ball mill operating environment can be efficiently prevented from entering the operating space of the hydrostatic bearings.

An injection molded part accommodates a threaded fastener and includes a metal insert. The insert defines a longitudinal axis and has an end face and an outer peripheral surface. A cutout extends from the end face and through the insert to permit the threaded fastener to extend therethrough. A plastic body surrounds the outer peripheral surface and has a threaded fastener contact face. The threaded fastener contact face of the plastic, body is recessed at a recessed distance below the end face of the insert which has a spring constant with respect to the longitudinal axis. The recessed distance and the spring constant are selected to deform the insert in response to a stress force applied to the end face thereof by the threaded fastener to cause a pregiven component of the stress force to be introduced into the threaded fastener contact face of the plastic body.

The invention discloses a homogeneity blast heating vacuum drying box. The homogeneity blast heating vacuum drying box comprises a heating box body and a box door, the side, facing the box door, of the heating box body is of an open structure, and the heating box body and the box door are closed to form a heating cavity; one set of heating pipe is embedded in the parts, facing the heating cavity,of the top and bottom of the heating box body respectively, one set of blasting panel is mounted on the parts, facing the heating cavity, of the left side wall and the right side wall of the heating box body respectively, and the two sets of blasting panels are connected with a same air blower through air inlet pipelines; and the sides, facing the heating cavity, of the blasting panels are evenlyprovided with ventholes. On the one hand, the homogeneity blast heating vacuum drying box make the heating temperature at each position of the heating cavity from bottom to top be the same, on the other hand, the intensity of the drying air applied to to-be-dried objects on different grids in the heating cavity is the same; the internal heating temperature is homogenous and stable, the intensity of the drying air on the same grid is the same, the whole drying homogeneity of the drying box is effectively improved, and the drying quality is improved.

The present invention refers to a manufacturing process of an aperture surrounding frame for an aircraft fuselage, the method comprising the steps of providing a tubular braiding material (2) having a perimeter equal to the perimeter of the frame to be manufactured, cutting the tubular braiding material (2) to obtain annular-shaped braiding slices (3), providing an annular-shaped inner mold (4) having a surface with a desired shape for the aperture surrounding frame, laying up at least one braiding slice (3) around the inner mold (4), forming the at least one braiding slice (3) around the inner mold (4), and curing said aperture surrounding frame pre-form. The invention also refers to an aperture surrounding frame (1) for an aircraft fuselage obtained as a continuous body by forming at least one annular-shaped braiding slice (3) having a perimeter equal to the perimeter of the desired aperture surrounding frame.

The invention provides a heat-resisting polyethylene composite pipe and a preparation method of the heat-resisting polyethylene composite pipe. The invention provides the heat-resisting polyethylene composite pipe which can be used as a water inlet pipe and a water outlet pipe of a water faucet, a water inlet pipe of a shower head, a toilet water inlet pipe, a floor heating pipe and the like, and also provides the preparation method of the heat-resisting polyethylene composite pipe. The heat-resisting polyethylene composite pipe comprises an inner pipe and an outer pipe; the inner pipe is a heat-resisting polyethylene pipe and the outer pipe is a cross-linked modified heat-resisting polyethylene pipe; and the outer pipe is covered outside the inner pipe. By a twice extruding and cladding manner, the inner pipe is firstly extruded and then another extruding machine is used; and a heat-resisting polyethylene material added with a cross-linking agent is covered on the inner pipe to form a cross-linked modified heat-resisting polyethylene outer pipe, so that the inner pipe and the outer pipe are tightly connected to form the heat-resisting polyethylene composite pipe.