43results about How to "Meet assembly requirements" patented technology

The utility model discloses a portable air floating fan rotor installation positioning tool, and relates to the technical field of air floating fan rotor installation, the portable air floating fan rotor installation positioning tool is provided with a flange fixing disc, a short nylon pipe and a long nylon pipe, the flange fixing disc is used for fixing a rotor pull rod on an end cover, and the short nylon pipe is used for fixing the short nylon pipe on the end cover; the short nylon tube is responsible for protecting the rotor from being in contact with the stator and sliding lubrication, the long nylon tube is responsible for guiding installation of the bearing seat and the end cover on the other side, and the nylon tubes are conical and can be directly inserted and installed, so that the nylon tubes can be detached after being assembled by ingeniously utilizing assembly holes in a motor shell, and a product is not influenced at all. The nylon material is low in cost, lubrication can be kept, the rotor and the stator can be in indirect contact, the assembling requirement can be met, the defect that an air bearing cannot bear too heavy force is overcome, the overall structure is small and exquisite, dismounting and carrying are convenient, and the air bearing is more suitable for an existing air floating fan.

The invention discloses a BGA (Ball Grid Array) area flatness PCB (Printed Circuit Board) and a preparation method thereof in the technical field of PCB production processes, and aims to solve the problem that the flatness cannot meet the actual production requirement in the prior art. The preparation method comprises the following steps: obtaining a carrier, a prepreg and a peelable copper foil; sequentially laminating the carrier, the prepreg and the peelable copper foil to form an upper, middle and lower laminated structure; laminating and pre-curing the upper, middle and lower laminated structure by adopting a laminating machine to form a false layer; laminating the false layer with a preset inner-layer core plate, a press steel plate and a buffer material to form a multi-layer PCB structure; and stripping the strippable copper foil from the multi-layer PCB structure, and removing the false layer to obtain the BGA area PCB with the preset flatness. According to the method, the flatness range of the BGA area can be controlled within 50 # imgabs0 #.

The utility model relates to the technical field of air conditioner part assembly, in particular to a commercial air conditioner base sheet metal part which comprises a first sheet metal accessory and a second sheet metal accessory, a first bolt hole is formed in the surface of the first sheet metal accessory, and a second bolt hole is formed in the surface of the second sheet metal accessory. The first metal plate accessory and the second metal plate accessory are both formed by blanking and bending, the first metal plate accessory and the second metal plate accessory are fixedly connected and formed through a connecting bolt, and a mounting groove is formed in the inner side of the first metal plate accessory. According to the utility model, through the fixation of the bolts and the box body, during actual operation, the situation that sheet metal parts are loosened during the operation of finished products due to the fixation of the fixing bolts of the sheet metal parts of the base is avoided, and by adopting the sheet metal part fixing mode, the operation is convenient, the assembly requirement is met, and the fixation is realized through the fixing mode of the periphery and the box body; in this way, a worker can conveniently and firmly fix the parts during operation.

The utility model provides a wave generator assembly tool of a harmonic reducer. The wave generator assembly tool comprises a press-fitting base and a guide shaft arranged on the press-fitting base. The guide shaft comprises a first guide part and a second guide part, the first guide part is used for being connected with the cam, and the cam can slide in the axial direction of the first guide part; the second guide part is sleeved with a guide sleeve, and the guide sleeve can slide in the axial direction of the second guide part. A positioning part protruding in the radial direction is arranged on the peripheral wall of the guide sleeve, and the first guide part, the second guide part and the positioning part are coaxially arranged; the positioning part is used for being connected with the flexible bearing in a sleeving mode, and the peripheral wall of the positioning part is attached to the inner wall of the flexible bearing. In the assembling process, the cam pushes the guide sleeve downwards, the positioning part is made to retreat from the inner ring of the flexible bearing, meanwhile, the cam is extruded into the flexible bearing from the upper portion, in the process, the cam and the flexible bearing are kept coaxial all the time, the assembling requirement of the wave generator is met, secondary deformation of the flexible bearing is avoided, and then the product quality is guaranteed.

The present invention discloses a lifting and positioning device and an assembly method for a special-shaped thick-walled stainless steel head, wherein the lifting and positioning device comprises a hanger, a cushion block assembly and an adjustable pull rod; the lifting and positioning device of the present invention can prevent the flange surface of the head from being deformed by force and can achieve the purpose of adjusting the horizontality of the head during the lifting and lifting process; the head assembly method of the present invention can make the horizontality of the head and the coaxiality of the head and the lower supporting plate meet the requirements by adopting the lifting and positioning device and the guide member, thereby improving the assembly efficiency and assembly accuracy.

The invention discloses an adjusting device for thermal deformation correction of an aero-engine turbine case, which comprises a base, a circle of fixing mechanism is arranged on the periphery of the top surface of the base in a surrounding manner, a circle of correction assembly is arranged on the inner side of the fixing mechanism in a surrounding manner, and a lifting lug bolt is further arranged on the top surface of the base. The recovery problem of turbine case deformation is solved.

The invention discloses a manufacturing method of a display drilling screen polaroid and an OCA, and the method comprises the steps: 1, obtaining the related information of a display drilling screen according to the display drilling screen provided by a customer; 2, designing a corresponding punching die according to the obtained related information of the display drilling screen; 3, the punching die is placed on punching equipment, the punching die is positioned and fixed, and then the polaroid to be punched and the OCA to be punched are placed on the punching die to be positioned and fixed; 4, debugging punching equipment, presetting a path and a pressure index, and starting the punching equipment to respectively punch the polaroid and the OCA; the punching method is adopted, the appearances of the polaroid and the OCA can be formed at a time, the production efficiency is improved, the production time and the production cost are reduced, the edges of the polaroid and the OCA manufactured through the punching method are neat, and therefore the product quality of the polaroid and the OCA is improved, and the assembling requirement of the display drilling screen can be better met.

A buckle body feeding device relates to the technical field of jewelry spring buckle processing equipment and comprises a buckle body vibration disc, a buckle body downward moving guide rail assembly, a buckle body translation mechanism and a buckle body feeding transmission assembly. Wherein the buckle body vibration disc is used for containing buckle bodies, arranging the buckle bodies in sequence and then moving out the buckle bodies; the buckle body downward-moving guide rail assembly is located on the outer side of the buckle body vibration disc and arranged in the vertical direction, and the buckle body downward-moving guide rail assembly is connected with the buckle body vibration disc; the buckle body translation mechanism comprises a buckle body feeding bearing assembly which is located below the buckle body downward moving guide rail assembly. The buckle body feeding transmission assembly enables the buckle body translation pushing assembly to be in driving connection with an external power device. In the spring buckle assembling process, buckle bodies of spring buckles can be automatically fed, the assembling requirement of the spring buckles is met, manual operation is replaced, the assembling efficiency is improved, and the labor cost is reduced.

The invention provides a combined machining tool and method for two angle-formed supporting rod connector holes. The tool comprises a main supporting rod 1 and an auxiliary supporting rod 2 and further comprises a cushion block 3, a base 4, an outer circle positioning supporting plate 5, an inner circle positioning cylinder 6, a supporting bolt 7, a main supporting rod V-shaped base 8, a main clamping block 9, an auxiliary supporting rod V-shaped base 10, an auxiliary clamping block 11, a nut 12, a straight screw 13 and a hexagon screw 14. Two joints of the main supporting rod 1 and the auxiliary supporting rod 2 are combined together and are positioned and fixed through a V-shaped seat, a positioning part and a fixing part.

The electric heating device of the present invention includes a heating panel, a heating element, a heat insulation component, a fixing shell, a temperature measuring element, and a socket. The heating element is located on the lower side of the heating panel and has a power receiving part. The heat insulation component has a heat insulation cavity with an upper opening for covering the heating element. The fixing shell has a shell cavity with an upper opening for accommodating the heat insulation component, and the upper end of the fixing shell is connected to the heating panel by an adhesive material. The temperature measuring element is installed at the bottom of the heat insulation component. The socket is fixed to the side of the fixing shell and electrically connected to the power receiving part and the temperature measuring element respectively through a power supply wire and a detection wire. The power supply wire is arranged in a power supply groove, and the detection wire is arranged in a detection groove. The interface end of the socket faces the side of the fixing shell. By providing a socket on the fixing shell, external wiring can be quickly connected to the socket of the electric heating device through a plug during assembly. This assembly method is simple, quick, reliable, and interchangeable, achieving modular packaging and good overall product integrity.

This utility model discloses a compact, built-in sensor hydraulic support electro-hydraulic push jack, relating to the field of push jacks. It includes a positioning component, a limit plug, a cylinder bottom, a cylinder barrel, a piston, a piston rod, a guide sleeve, and a displacement sensor. The cylinder bottom is fixedly assembled at the bottom opening of the cylinder barrel, and a sensor socket is welded to the outer surface of the cylinder barrel. This utility model achieves built-in installation of the displacement sensor by designing a dedicated cavity structure inside the cylinder bottom and precisely assembling the limit plug and positioning component. While retaining the cylinder bottom pin hole structure to meet specific hydraulic support assembly requirements, it also achieves cable avoidance and positioning fixation through slots and through holes. All components are arranged orderly inside the cylinder bottom, eliminating the need for additional expansion of the overall jack size, significantly improving structural compactness and meeting the size limitations of hydraulic supports for push jacks.

The utility model discloses an anti-slip bearing fixing structure which comprises at least one pair of spacer bushes arranged on a transmission shaft in a sleeving mode and fixing hoops used for limiting the positions of the spacer bushes. The spacer bushes are respectively positioned on two sides of the bearing on the transmission shaft; the spacer bush comprises a pipe body arranged on the transmission shaft in a sleeving mode, one end of the pipe body abuts against the bearing inner ring of the bearing, and a circle of boss is annularly arranged at the other end of the pipe body; the fixing hoop comprises a pair of oppositely-closed hoops capable of being oppositely opened and closed, one side of each oppositely-closed hoop abuts against the corresponding boss, a pressing hole is formed in the other side of each oppositely-closed hoop, and a pressing screw tightly abutting against the corresponding boss of the spacer bush is connected into each pressing hole in a screwed mode. The utility model discloses an anti-slip bearing fixing structure, which is suitable for a longer transmission shaft and can reduce the abrasion of the transmission shaft caused by slip between a bearing inner ring and the transmission shaft.

The invention provides an automatic nut locking device and method for a bicycle hub, which solves the problem that the hub needs to be manually turned over to tighten a nut, the operation process does not need to independently use manpower, the device automatically finishes the operation, the operation steps are simplified, the assembly requirement is met, and the working hours and the manpower are saved. A back plate is arranged on the base; a product bearing seat capable of being driven to rotate is arranged at the position, in front of the back plate, of the base, and a plurality of station holes used for containing hubs are formed in the product bearing seat; an upper nut locking mechanism and a lower nut locking mechanism which can move up and down are arranged on the front side face of the back plate, an upper nut lock head capable of rotationally locking an upper nut is arranged on the bottom side of the upper nut locking mechanism, and a lower nut lock head capable of rotationally locking a lower nut is arranged on the top side of the lower nut locking mechanism; an upper pre-pressing mechanism and a lower pre-pressing mechanism are further arranged at the position, between the upper nut locking mechanism and the lower nut locking mechanism, of the front side face of the back plate.

This utility model belongs to the bicycle hub manufacturing industry, and particularly relates to the assembly of bicycle hub freehub and disc brakes. Specifically, it relates to a preload cover pressing fixture, which solves the problem that installing preload covers at both ends of a bicycle hub requires two pieces of equipment. It can assemble the preload covers at both ends of the hub simultaneously, saving additional equipment and improving work efficiency. It includes an upper pressing block with a first positioning sleeve at its lower part. The cavity of the first positioning sleeve is used to fit the upper end of the hub body, and the annular end face at the bottom of the first positioning sleeve is used to contact the upper preload cover. A lower pressing block is assembled in the positioning cavity of the positioning pad and can slide up and down relative to it. Its bottom is connected to the positioning pad, and its top is provided with a second positioning sleeve. The annular end face at the top of the second positioning sleeve is used to contact the lower preload cover. The second positioning sleeve is provided with a probe that is inserted into the inner hole of the hub body for positioning.

This utility model relates to the field of aircraft maintenance equipment technology, and in particular to a fixture for adjusting and measuring the clearance of a high-pressure valve in an aircraft. The fixture includes a guide sleeve and a fastening screw. The guide sleeve has a threaded first mating hole on its side and a through-hole second mating hole inside for mating with the valve plate shaft of the high-pressure valve. After the fastening screw is screwed into the first mating hole, it tightens against the valve plate shaft, thus fixing the valve plate shaft, the guide sleeve, and the fastening screw together. The guide sleeve has a small end diameter of 28.2 mm and a large end diameter of 47 mm. The transition surface between the small and large ends is a mating surface, with a gap between it and the flow channel body of the high-pressure valve. The large end face of the guide sleeve forms a measurement reference surface, and the axis of the first mating hole intersects perpendicularly with the axis of the second mating hole. This fixture has a simple structure, is easy to operate, and can accurately measure the clearance of a high-pressure valve in an aircraft, improving measurement efficiency and accuracy.

The invention discloses an oil cylinder barrel machining method and a numerical control boring machine, the numerical control boring machine comprises a machine tool, a headstock, a guide rail and an oil receiver, and further comprises an outer circle cutting device arranged between the headstock and the oil receiver, and the outer circle cutting device comprises a first moving mechanism, a second moving mechanism and a tool apron; the first moving mechanism is used for driving the second moving mechanism and the tool apron to reciprocate on the guide rail; the second moving mechanism is used for driving the tool apron to reciprocate in the direction perpendicular to the guide rail. The tool apron is used for installing a turning tool for machining the outer circle frame position. It can be seen that the outer circle cutting device is additionally arranged on the numerical control boring machine, one-time clamping synchronous machining of the inner hole of the oil cylinder barrel and the outer circle frame position is achieved, positioning errors and reference conversion errors caused by multiple times of clamping are eliminated, and the coaxiality precision of the inner hole of the oil cylinder barrel and the outer circle frame position is greatly improved; the assembling and using requirements of high-precision hydraulic oil cylinders such as coal mine hydraulic support oil cylinders are met, the machining efficiency is improved, and the overall production period is shortened.

The invention discloses a vacuum assembly device, and belongs to the technical field of semiconductor equipment. The vacuum assembly device comprises a vacuum chamber, a first working module and a second working module, a working cavity is formed in the vacuum chamber, and a product is assembled in the working cavity; the first working module is arranged on the vacuum chamber, and the first working module is used for clamping a first part of a product and moves in the first direction and the second direction; and the second working module is arranged on the vacuum cavity, the second working module is used for clamping a second part of the product and moving in the third direction, and the first working module can enable the first part to be close to and press the second part. The precise part can be conveniently assembled in a vacuum environment, and the vacuum sealing state in the precise part is guaranteed.

The utility model discloses a separable optical fiber connector, which belongs to the technical field of separable optical fiber connectors, and comprises an insertion core assembly, an inner frame sleeve, a connector main body and a crimping assembly. The optical fiber connector can be disassembled and assembled in a split mode after the insertion core assembly and the optical fiber are connected and fixed, and the requirement for disassembling and assembling in a split mode after the preformed end optical fiber connector is arranged is met. The optical fiber connector capable of being split is simple in structure and convenient to assemble and disassemble, the assembling and disassembling process of the optical fiber connector can be effectively simplified, bending state inspection before the optical fiber and the insertion core are fixed is achieved, the situation that the optical fiber is excessively bent due to the fact that the optical fiber is reserved to be too long is avoided, additional attenuation is reduced, and the application reliability of an optical cable is improved. Conditions are provided for air-blowing laying of the optical cable.

The utility model discloses an assembled fence, including the joint structure, the joint structure is located in the fence, its characterized in that still includes: support structure, support structure is used for to adjacent two fence support, the joint structure includes, first joint board and second joint board and the plug -in rod, there is a and the plug -in rod size matching plug -in hole after first joint board and second joint board combination, the plug -in rod is inserted in the plug -in hole, is used for to first joint board and second joint board spacing, all be equipped with spacing groove on first joint board and second joint board, be equipped with the plug -in board on the plug -in rod, and the size of plug -in board and spacing groove matches. The assembled fence, through setting up the joint structure that is composed of first joint board, second joint board and the plug -in rod, cooperation bearing plate and slide rod realize the horizontal plug -in assembly of adjacent fence, need not lift the fence to be completed connection, and the human consumption of installation is reduced greatly.

The utility model relates to a cell module shaping mechanism, especially a cell module shaping device. A cell module shaping device, including the setting of push -pad group one and push -pad group two of the surface of the setting board for supporting cell module is set up mutually perpendicular, push -pad group one includes two mirror image settings push -pad no.

The utility model relates to the technical field of power distribution cabinets, in particular to a reaming device for a power distribution cabinet, which comprises a base, a slidable workbench and a first electric push rod, the slidable workbench is arranged at the top of the base, and the first electric push rod is mounted at one end of the base through a mounting seat. The output end of the first electric push rod is connected with a first connecting rod, a fixing plate is arranged at one end of the first connecting rod, and the fixing plate is connected with one end of the slidable workbench through a screw; a T-shaped mounting plate is arranged on one side of the base, a second electric push rod is fixed to one end of the top of the T-shaped mounting plate, and a direct current motor is arranged at the lower end of the T-shaped mounting plate; the novel reaming device is provided with a structure for driving the to-be-reamed part to move stably, the to-be-reamed part is prevented from shaking or shifting in the reaming process, and then the reaming stability and accuracy can be effectively improved.

The present application belongs to the technical field of high-performance steel production, and discloses a high-performance steel plate processing heat treatment equipment, which comprises a heating chamber, a support component for placing and fixing the steel plate is arranged in the heating chamber, the support components are arranged in multiple groups, the support components in the same group are located on the same vertical plane, and the support components in each group are arranged in parallel and along the horizontal direction; the support component comprises a clamping plate capable of adjusting the interval; the steel plate is changed from the traditional horizontal placement mode to the vertical state for heat treatment, so that the stress of the steel plate in the vertical direction is uniform, and the middle sag phenomenon caused by the weight is effectively eliminated. In the heating and cooling process, the temperature gradient of the steel plate along the thickness direction is more symmetrical, the thermal contraction behavior of the edge and the center region tends to be consistent, and the internal stress imbalance problem caused by asymmetric cooling is significantly reduced.

The utility model belongs to electrical equipment - low voltage switch technical field discloses a kind of circuit breaker vacuum arc-extinguishing chamber assembly tool, including bottom plate, positioning support, soft connection clamping component and arc-extinguishing chamber clamping component;Positioning support is fixed on bottom plate, soft connection clamping component is set in the top of positioning support liftablely, including the positioning plate for fixed soft connection and the positioning rod of supporting positioning plate lifting, arc-extinguishing chamber clamping component is set in the middle part of positioning support, including the clamping rod for clamping arc-extinguishing chamber with open adjustable and the tension spring for providing the clamping force of clamping rod.The tool adopts simple structure, and the material of reliable strength is positioned to vacuum arc-extinguishing chamber and soft connection, and optimization assembly process improves assembly speed, precision and guarantees the assembly height requirement of arc-extinguishing chamber, guarantees the conductivity of vacuum arc-extinguishing chamber, solves the problem of complicated step, inconvenient positioning in the installation process of vacuum circuit breaker arc-extinguishing chamber in current technology, greatly improves assembly efficiency.

A device and process for straightening heat-resistant steel pipe castings, comprising the following steps: 1. Placing the pipe casting on a platform, with several positioning blocks tightly connecting it to the platform; electrically heating the cooled and deformed pipe casting to apply pressure for straightening; 2. Turning on the electric heating temperature control device to reach the set temperature, and then turning it off; 3. Moving the pressurizing device to apply the set pressure to the pipe casting; when the pressure reaches the required value, the hydraulic cylinder pushes the casting at the desired straightening position in the preset direction to the position of the limit block on the casting fixing device, and then turning off the pressurizing device; 4. Keeping the casting stationary and waiting for it to cool down; when the temperature reaches the set value, opening the clamping device to remove the casting, completing the casting deformation straightening. This invention not only quickly straightens pipe castings, reducing the defect rate and scrap rate, but also greatly improves the production efficiency and customer satisfaction of pipe castings.

The present invention relates to the technical field of composite material forming, and in particular to a method for preparing an absorbing prepreg based on reducing the deformation of a co-cured panel, comprising the following steps: preparing an absorbing resin, taking part of the absorbing resin and unfolding it into two groups of absorbing film units with the same surface density and compounding them with a transparent fiber to obtain an absorbing prepreg; co-curing the absorbing prepreg with a matrix prepreg into a composite panel I; designing the surface density ratio of the two groups of absorbing films according to the deformation of the composite panel I and the average vertical reflectivity in the X-band, and taking part of the absorbing resin and unfolding it into two groups of absorbing film units with different surface densities and a transparent fiber to obtain an absorbing prepreg based on the surface density ratio; and co-curing the final absorbing prepreg with a matrix prepreg into a composite panel. The technical solution can make the absorbing prepreg have non-uniform deformation, resist the deformation of the co-cured panel, and basically do not affect the stealth performance, greatly reduce the deformation performance of the co-cured parts, and meet the assembly requirements.

The invention discloses an HTCC ceramic metal shell for a hybrid integrated circuit and a preparation method thereof, the shell comprises a ceramic substrate, a metal upper frame, a metal lower frame, a cover plate and a lead, the ceramic substrate forms the bottom wall of the shell, the metal lower frame is located above the ceramic substrate and arranged along the periphery of the ceramic substrate, the metal upper frame is located above the metal lower frame, and the metal lower frame is located above the metal upper frame and arranged along the periphery of the ceramic substrate. The metal lower frame and the metal upper frame jointly form the side wall of the shell, and the cover plate is located above the metal upper frame; the bottom surface and the side surface of the ceramic substrate are respectively provided with a plurality of groups of horizontal grooves and vertical grooves which are communicated with each other, metalized layers are arranged on the surfaces of the horizontal grooves and the vertical grooves, and leads are welded in the horizontal grooves and the vertical grooves. The preparation method adopts a step-by-step assembly process. The reliability requirement and the electrical requirement of the device hybrid integrated circuit are met.

The application discloses a punching process for a Mylar sheet, which solves the edge quality problem caused by uneven stress in traditional single-sided punching. The process realizes high-precision processing through double-sided synchronous punching and composite clamping positioning: after the Mylar sheet is introduced into the punching area by a conveying mechanism, the adsorption clamping mechanism is adsorbed and clamped by a negative pressure cavity and tensioned by an elastic pressure head, forming double positioning of center fixing and edge tensioning; the punch mechanism drives the asymmetric synchronous movement of the upper and lower punch heads through rack and pinion transmission, the lower punch head is driven to go down by the upper punch head, and the two punch heads meet and punch at the knife groove, so that the shearing force is symmetrically distributed on both sides of the material, and the unilateral bending moment effect is eliminated. The equipment adopts modular design, and the punch head and the adsorption box can be quickly replaced to adapt to different hole types. Through force field balance control and precise transmission, the process significantly reduces edge flanging and burrs, improves hole consistency, is suitable for precise Mylar sheet processing in the fields of electronics and electrical appliances, and has the advantages of high efficiency, stability, convenient type changing and the like.

This utility model belongs to the field of charging system technology and proposes a universal charging base, including a base body. The base body is fitted with a fast charging end and a slow charging end. The fast charging end connects to a docking plate. Two through-tubes are provided on the other side of the docking plate. Each through-tube has an internal mounting cavity containing a snap-fit ​​piece. Mounting holes are formed on the side walls of the mounting cavities, and bolts are slidably fitted into these holes. The bolts pass through the snap-fit ​​pieces and connect to the inner wall of the mounting cavities. A tail end cap is fitted onto the end of each through-tube. The slow charging end connects to a slow charging socket. A tail end sleeve is fitted onto the other end of the slow charging socket. The inner cavity of the slow charging socket has multiple power plugs, and the inner cavity of the tail end sleeve has multiple docking slots. This universal charging base proposes inserting a snap-fit ​​piece with a DC cable into the mounting cavity and using bolts to fix the snap-fit ​​piece to the through-tube. A tail end sleeve with a slow charging AC cable is fitted onto the slow charging socket. The specifications of the base body, fast charging end, slow charging end, docking plate, through-tubes, and slow charging socket are standardized.

The application relates to a floor access hole structure and a vehicle, which comprises a floor, an access hole, an upper sealing assembly and a lower sealing assembly. The floor is provided with an access hole penetrating through the upper and lower sides of the floor. The access hole is provided with an access hole. The access hole is provided with an upper sealing assembly and a lower sealing assembly. The upper sealing assembly seals the upper end opening of the access hole. The lower sealing assembly seals the lower end opening of the access hole. The outer part of the access hole can be designed according to the shape and size of the access hole. The inner part of the access hole is designed as a conventional straight hole structure. The upper sealing assembly and the lower sealing assembly are designed as simple structures or directly selected as existing standard flat sealing covers, so that the sealing of the special structure access hole can be realized, and the problem that the sealing cover cannot be selected for the sealing of the special structure access hole is solved. Moreover, the floor access hole structure is convenient to disassemble and reliable in sealing, and the problem that the sealing cover purchased from outside is not good in sealing and inconvenient to install when sealing the special structure access hole is solved.

The present invention relates to the technical field of composite material forming, and in particular to a method for preparing a wave-transmitting fiber that reduces the curing deformation of a co-cured composite material, comprising the following steps: detecting the thermal expansion coefficient of the matrix fiber material therein; preliminarily determining the linear density, twisting form and weaving pattern of the wave-transmitting fiber material, and thereby obtaining a wave-transmitting fiber fabric, and then detecting its thermal expansion coefficient; matching the thermal expansion coefficient with the thermal expansion coefficient by changing the corresponding linear density, twisting form and / or weaving pattern; preparing a wave-absorbing prepreg, and co-curing the wave-absorbing prepreg with the matrix prepreg into a composite panel. The technical scheme controls the thermal expansion coefficient of aramid fibers by regulating the linear density, twisting mode and fabric form of the wave-transmitting fiber fabric in the wave-absorbing prepreg, so that it matches the thermal expansion coefficient of the matrix fiber, thereby reducing the overall deformability of the co-cured panel finally prepared.