235results about How to "Avoid cumbersome procedures" patented technology

Using the way of destruct, the complex system is split into several different qualitative elements (the definition of indicator, the definition of database, the definition of scheduling, the definition of check way, etc.). Each element has its special concept. Combing different elements organically, a completely certain meaning indicator-checked incident is produced, and it is possible to finish the expected indicator-checked task flexibly. In the case of the check fails, due to the pre-warning it is possible to perform the manual intervention in time.

An automatic straightening machine for a shaft tube part comprises a rack, an electric cylinder, a floating work table, a left rotating device, a right clamping device, a supporting seat and a detecting sensing device. The rack is of a frame structure, the electric cylinder and the floating work table are arranged on an upper transverse beam and a lower transverse beam of the rack correspondingly,and the left rotating device and the right clamping device are arranged on the left side and the right side of the floating work table correspondingly. The supporting seat is arranged in the centralposition of a lower fixing plate of the floating work table, and the detecting sensing device is arranged in the supporting seat. According to the automatic straightening machine for the shaft tube part, in the straightening process, a to-be-straightened piece is clamped at a time so as to achieve the multi-time detecting and straightening functions, and the tedious work procedures that during straightening, after deflection measurement is completed every time, clamping tips need to be loosened, and then the to-be-straightened piece is placed on a V-shaped block to be straightened are avoided;and meanwhile, the problem of maximum deflection face deviation when the clamping tips are loosened to enable the to-be-straightened piece to be placed at the support point is solved, and the efficiency of the straightening machine and the accuracy of straightening are improved.

The present invention provides an assembly type solar photovoltaic power generation road surface module and application thereof. The module comprises at least the following structures from bottom to top: an insulated sealing layer, a solar photovoltaic panel layer, and a transparent anti-slide wearing layer. The module is mainly used for solar photovoltaic power generation. The assembly type solar photovoltaic power generation road surface module can meet both the road bearing demand and the solar photovoltaic power generation demand, and has a broad market prospect.

The invention discloses a device for controlling the concentration of an erosion solution in a concrete durability experiment, which comprises a buffer slot (1), a circulating pump (2), an experiment environment box (3), a titrating pump (4), a measuring slot (5), a controller (6), a recovering slot (9) and valves, wherein the buffer slot is communicated with an ion replenishing valve (7) and a water replenishing valve (8) and is communicated with the experiment environment box through the circulating pump; the experiment environment box is connected with the measuring slot through the titrating pump; the controller is connected with the measuring slot through a measuring electrode and is connected with the ion replenishing valve and the water replenishing valve through data lines; and the recovering slot (9) is connected with the experiment environment box through a liquid discharging valve (10). The device for controlling the concentration of the erosion solution in the concrete durability experiment is used for automatically regulating the concrete durability experiment to simulate the concentration of harmful ions in the erosion solution in the experiment environment box, thereby ensuring that the concentration of the harmful ions in the environment of specimens used in the concrete durability experiment is stabilized in the set range. The invention achieves the online control of the concentration of the erosion solution and increases the function of the concrete durability experiment.

The invention discloses a novel testing device and testing method for the sealing performance of a pipe plate and a heat exchange pipe. The existing equipment adopts a welding mode for sealing and can not be used repeatedly, the procedure is complicated after subsequent related tests are carried out on a sample, and the process test can be continuously carried out only after cutting and separating a sealed pressure container and a test drum and grinding slots of the sample. The novel testing device comprises an end cover (5), the testing drum (1), a sealing pad and a corresponding pipe joint, wherein a sealing cavity is formed by the tested pipe plate (3), the testing drum and the sealing pad; in test, a highest-end pipe seat A is connected with the testing drum, and a bottommost-end pipe seat B is connected with the testing drum; and the sealing form of the tested pipe plate adopts an octagonal groove or a boss plane for sealing. The novel testing device and the testing method can be used for test on the sealing performance of the pipe plate and the heat exchange pipe, and pressure resistance test, and also can be used for leakage test.

The invention discloses a radial-reverse combination extrusion forming mold of a thin-wall cylindrical piece with an outer boss. The mold comprises an upper mold assembly, a lower mold assembly, a male mold, a female mold, a mandrel, a core support, an extrusion ring, an ejection block and a movable block, wherein the male mold is mounted on the upper mold assembly, the core support is mounted atthe bottom of the mandrel, the mandrel drives the core support to slide and stretch out and draw back of the male mold, and the extrusion ring sleeves the part stretching out of the core support; thefemale mold is mounted on the lower mold assembly, a cavity and a movable block groove are arranged in the female mold, the core support and the cavity are located on the same central shaft, after themovable block groove allows the movable block to be placed and is filled with the movable block, the shape of the cavity is a full cylinder shape, the ejection block is arranged in the cavity, the height of the ejection block is smaller than the height of the cavity, the upper part of the movable block protrudes out of the ejection block, the side surface forms an inwards-concaved boss cavity, and the outer diameter of the extrusion ring is the same as the diameter of the female mold cavity. The radial-reverse combination extrusion forming mold of the thin-wall cylindrical piece with the outer boss can directly form the thin-wall cylindrical piece with any position, size and number of bosses at one step, and the mechanical performance of the thin-wall cylindrical piece is greatly improved.

The invention relates to an ion beam radiotherapy dosage verification method based on water equivalent coefficients. The ion beam radiotherapy dosage verification method based on the water equivalent coefficients includes the following steps that A, CT image data of a cancer patient are obtained, a treatment planning system (TPS) is utilized for plan design according to a CT-water equivalent coefficient transformation curve, and ion beam radiation parameters are recorded after the plan is determined; B, a virtual three-dimensional water phantom CT image is generated based on the water equivalent coefficients, the ion beam radiation parameters are transplanted to the water phantom through the TPS, dosage optimal computation is carried out again, and three-dimensional rasterization dose distribution in the water phantom is obtained; C, an ionization chamber is placed at an interest point in the three-dimensional water phantom, interpolating calculation is carried out in the three-dimensional rasterization dose distribution according to the three-dimensional coordinates of the sensitive volume of the ionization chamber in the water phantom, and planned dosage of the interest point is obtained; D, the ion beam radiation parameters designed as planned control a medical heavy-ion accelerator to perform simulated irradiation on the water phantom, and the measured absolute dosage value of the interest point for the ionization chamber in the water phantom is compared with the planned dosage.

The invention discloses a radial-reverse combined extrusion molding method for a thin-walled cylindrical piece with outer bosses. A radial-reverse combined extrusion mold for the thin-walled cylindrical piece with the outer bosses is related in the method. The mold comprises a male mold, a female mold, a mandrel, a core support, an extrusion ring, a top block and a movable block. The core supportis installed at the bottom of the mandrel. The extrusion ring is connected to the extending outer portion of the core support in a sleeving mode. A cavity and a movable block groove are formed in thefemale mold. The upper portion of the movable block protrudes out of the top block. An inwards-concave boss type cavity is formed in the side face of the top block. The method includes the steps thatthe male mold downwards presses the extrusion ring and a hollow blank, the blank flows in the radial direction to fill in the boss type cavity, then the extrusion ring is omitted, the hollow blank moves down along with the male mold to be extruded into the thin-walled cylindrical piece, the thin-walled cylindrical piece is reversely extruded to rise, the movable block is driven to move up together, and the height of the thin-walled cylindrical piece is increased. By means of the scheme, the thin-walled cylindrical piece with an arbitrary number of bosses with arbitrary sizes at arbitrary positions can be directly formed at a time, and the mechanical performance of the thin-walled cylindrical piece is greatly improved.

The invention provides a technical scheme of a method for whole hole replacement of an existing bridge. A self-propelled girder moving cart is matched with a pier steel tower rack to perform whole hole replacement of the existing bridge. The system has little influence on business line train operation and existing equipment and is simple in operation, high in applicability and good in safety.

An intensive mine ventilation resistance measuring and calculating method comprises the following steps that a plurality of ventilation resistance measuring subsystems are arranged in underground roadways, and wind speed sensors are reasonably arranged; two or more underground roadways which are connected in parallel share an initial node and a tail node, pitot tubes and pressure difference sensors are arranged at the initial node and the tail node of the roadways, and the sharp ends of the pitot tubes are perpendicular to the cross sections of the roadways and right face the wind flow direction; long pipelines and short pipelines are arranged fixedly along the waist lines of the inner walls of the roadways; the wind outlet ends of the long pipelines and the wind outlet ends of the short pipelines are connected with two measurement connectors of the pressure difference sensors correspondingly, and then the ventilation resistance hi of the roadways can be obtained; the ventilation resistance h of a mine is calculated; and the wind resistance Ri of each roadway is calculated. The method can save resources needed by measurement of mine ventilation resistance with an existing differential pressure gauge method, can avoid measurement errors caused by human factors, can achieve high-precision mine ventilation network online resolution and facilitates intelligent adjustment and control and advanced alarm of a mine ventilation system.

Provided are a structure of an alternative folding flange type steel plate shear key and a construction method thereof. The steel plate shear key includes a ribbed plate which has semicircular holes,trapezoidal flange plates alternatively folding, and semicircular end plates. The semicircular hole is internally provided with a horizontal through rebar. A vertical bending rebar is arranged among the flange plates. An upper concrete panel is poured on a steel beam top plate, and the upper concrete panel completely covers the steel plate shear key. The construction method comprises the followingsteps: cutting and forming steel plates used in the shear key, alternatively folding the trapezoidal flange plates and the end plates, welding the ribbed plate integrally with the steel beam top plate, placing the horizontal through rebars and the vertical bending rebar, binding the structure using a reinforcing mesh, pouring the upper concrete panel and normally maintaining to set time, dismounting a formwork. The alternative folding flange type steel plate shear key is welded integrally with a steel beam, cooperative work of upper concrete and a lower steel beam is realized. The structure is advantaged by simple structure, convenient and fast construction, and little steel material waste, and is beneficial for popularization and application of a steel-concrete combined bridge.

The invention belongs to the technical field of road engineering, and particularly relates to a road reflection crack welding material and a construction process thereof. The road reflection crack welding material is prepared by the following components in weight percentage: 80-85% of aggregate, 10-15% of high polymer material and 3-5% of additive; and road reflection cracks are repaired by such processes as detecting, sorting, cleaning, punching, welding and testing. The road reflection crack welding material uses the high polymer material as adhesive so as to be effectively combined with an asphalt surface layer and a base layer to form a whole, so that the cracks can be repaired and a structural damage problem generated from the cracks can be solved; and the construction is carried out under normal temperature without heating, and not affected by the season, air temperature and environment, so that the cracks can be repaired from bottom to top. The road reflection crack welding material has low production cost, a simple proportioning and construction process and extensive construction conditions, and is firm and wearable, and can be combined with the road surface to form the whole.

The invention relates to a multi-hook-face titanium alloy part forming device and method. According to the technical scheme, a male die is pressed to coarsely manufacture a workblank into a multi-hook-face titanium alloy part with the unfolded appearance; deburring, washing, lubricant coating are carried out; the device is arranged on a heat engine to be pre-heated into 550 DEG C to 600 DEG C, and meanwhile the workblank is pre-heated into 550 DEG C to 600 DEG C; the pre-heated workblank is arranged between a blank holder and a female die, and after the blank holder and the female die are combined tightly, the temperature ranging from 550 DEG C to 600 DEG C is kept, the clamping pressure is 40 t, the female die slowly descends at the descending speed ranging from 5 mm / min to 6 mm / min, the female die stays for three minutes to five minutes after descending for three to five minutes every time, the process is executed three times till the female die and the male die are closed, and the pressure is kept for four minutes to five minutes; the appearance is manufactured, and checking is carried out. The workblank in the non-working area is clamped tightly through the blank holder force of the blank holder, and wrinkles and cracks produced by tremendous changes of the plate face of the workblank when the dies are closed are avoided.

The invention discloses a feed particle-producing machine used for agricultural machinery. The machine includes a housing body, a screw-shaft motor, a first extrusion hole and a second extrusion hole.A hopper is arranged on the upper side of the housing body. A support column is arranged under the left end of the housing body. A wheel is arranged under the support column. A high-pressure water pump is arranged on the right side of the support column. A water tank is arranged on the right side of the high-pressure water pump. A power switch is arranged on the upper left end of the water tank.A plurality of improvements are made in the prior feed particle-producing machines. Through the arrangement of the water tank, the water pump, a flow meter and a heater, feed particles of different sizes can be produced by the machine. Feeding water into a feed inlet and performing heating can endow feed with uniform water content and a moderate aging degree and can kill other pathogens like parasites in the feed so as to avoid the feed with excessively high or excessively low water content causing the produced feed particles with excessively more powder which cause extrusion hole blockage andinconvenient transportation and storage.

The invention relates to a pre-tightening force measurement device of a high-strength bolt. The pre-tightening force measurement device comprises a first strain gage, a second strain gage and a rigid sleeve. The first strain gage and the second strain gage are symmetrically attached to the two sides of a screw, the screw is sleeved with the rigid sleeve, a first hole and a second hole corresponding to the first strain gage and the second strain gage are formed in the two sides of the rigid sleeve respectively, and therefore the first strain gage and the second strain gage are connected with a strain tester after being connected in parallel. The screw and the rigid sleeve are screwed together through a nut. On the premise of guaranteeing that a bolt bar is not damaged, the pre-tightening force measurement device can achieve real-time and accurate measurement of pre-tightening force of the bolt, and therefore the service condition at the connection portion of a connection component of the high-strength bolt can be monitored and detected.

An integrated ceiling system relates to the technical field of ceiling decoration. The integrated ceiling system comprises a plurality of ceiling panels, hang suction seats mounted on the back faces of the ceiling panels, a keel for mounting below a ceiling, and connecting members for connecting the hang suction seats and the keel; the hang suction seats are of strip-shaped structure and provided with a plurality of locking parts at intervals, each locking part comprises two limiting hook planes symmetrically arranged on the upper surfaces of the hang suction seats, and first magnets are arranged in the locking parts; a sliding groove is formed in the keel; the connecting members comprises a plurality of sliding blocks arranged at intervals and connecting rods for connecting the sliding blocks, the spacing of the adjacent sliding blocks on the connecting members is same as the spacing of the adjacent locking parts on the hook suction seats, and the sliding blocks are provided with upper clamping tongues and lower clamping tongues; and the upper clamping tongues are arranged in the sliding groove, baffles are mounted on the two ends of the sliding groove, the lower clamping tongues are embedded in a second magnet, and the limiting hook planes can hang the lower clamping tongues in a sleeving mode. The integrated ceiling system does not need to hit into a large number of screws on the keel when the ceiling is mounted, the installation time can be shortened, and meanwhile, disassembling is quite convenient.

The invention discloses a rapid aircraft fuel cleanliness detection method. In a stage of establishing pure aircraft fuel cleanliness scattering data, a first computer acquires brillouin scattering signals of first to eighth reflecting mirrors at different time periods by a first ICCD, draws brillouin scattering signal data generated at different optical paths, and establishes a brillouin scattering signal database of pure aircraft fuel according to the acquired brillouin scattering signal data; at the cleanliness detection stage of the to-be-detected aircraft fuel, the acquired brillouin scattering signal data and the established brillouin scattering signal database of the pure aircraft fuel are compared by a second computer, so that the cleanliness of the to-be-detected aircraft fuel can be obtained. According to the invention, when the aircraft fuel is detected, deep-seated aircraft fuel can be subjected to non-contact detection, so that the complex working procedures and long detection time of the traditional sampling detection are prevented; the rapid aircraft fuel cleanliness detection method is long in timeliness and capable of resisting interference.

The invention discloses an in-situ preparation method for a cubic copper oxide / graphene aerogel composite material. The method comprises the following steps of: S1) putting a copper net into 1-3M hydrochloric acid, absolute ethyl alcohol and deionized water in turn, performing ultrasonic cleaning and then drying; S2) dispersing graphene oxide into the deionized water and ultrasonically treating for 1-3 hours, thereby acquiring a graphene oxide dispersion liquid in the concentration of 1-5mg mL-1; S3) pouring the graphene oxide dispersion liquid acquired in the step S2) into an autoclave liner, putting the copper net acquired in the step S1) into the autoclave liner and performing hydrothermal reaction, wherein the temperature of the hydrothermal reaction is at 120-200 DEG C and the reaction time is 6-15h; and S4) taking out the product acquired from the step S3), quenching and performing freeze drying, thereby acquiring the copper oxide / graphene aerogel composite material, wherein the freeze drying time is 12-48h, the freeze drying temperature is at -30 to -50 DEG C and the vacuum degree is at 10-30Pa.

The invention provides a lifting device for shelves as well as a shelf component and a refrigerator. The lifting device for the shelves comprises first rod bodies, second rod bodies, third rod bodies and sliding locking members, wherein the first rod bodies and the second rod bodies are rotabablely connected; the first rod bodies are provided with first transfer parts; the second rod bodies are provided with second transfer parts; at least one of the first transfer parts and the second transfer parts is used for being rotatablely connected with the shelves; the third rod bodies are rotatablely connected with the first rod bodies; the third rod bodies are provided with the sliding locking members which can rotate relative to the third rod bodies; the sliding locking members are arranged on the second rod bodies in a cooperation manner; and further, the sliding locking members can slide along the second rod bodies or be tightly locked with the second rod bodies. The lifting device for the shelves, which is provided by the invention, can be unfolded to support the shelves or folded to be convenient to store; moreover, the heights of the positions of the shelves can be regulated through regulating the sliding locking members; and the lifting device is simple in composition structure, and has the advantage that a spatial volume is small in both unfolding and folding states.

The invention relates to a preparation method of large-particle-size hollow polymer microspheres. The preparation method comprises the following steps: preparing a metal hydroxide colloidal dispersant by the prior art, sequentially adding an oil phase (which is composed of a vinyl aromatic monomer, methyl acrylate (MA) and / or ethyl acrylate (EA) and contains an oil-soluble peroxide initiator) and a water phase containing a small amount of polymerization inhibitor into the metal hydroxide colloidal dispersant, carrying out high-speed shear emulsifying dispersion, transferring the emulsified dispersion solution into a reactor, and carrying out microsuspension polymerization to finally obtain the large-particle-size hollow polymer microspheres. The technique is one-step synthesis, is simple to operate and mild in reaction conditions, does not use any organic solvent as a pore forming agent, and has the advantages of environment friendliness and low pollution. The obtained large-particle-size hollow polymer microspheres are easy to separate.

The invention relates to a selective chemical plating method for polymer substrate surfaces. The method includes the steps: (a) performing pretreatment for the polymer substrate surfaces; (b) printing base coat on the polymer substrate surfaces by the aid of a coating process, and drying; (c) selectively printing sensitizing solution on the polymer substrate surfaces; (d) immerging polymer substrates into activating solution to activate; (e) chemically plating to obtain surface selectivity metallization polymer substrates. The method is simple in process and low in cost and has excellent selectivity and application prospects in fields such as flexible printed circuit boards and integrated circuits.

The invention discloses a post-earthquake self-recovery embedded energy dissipating steel column base. The post-earthquake self-recovery embedded energy dissipating steel column base comprises an upper column section, a lower column section, a buckling-restrained energy dissipating plate and a high-strength steel rod; the upper column section is located on the upper part of the lower column section, the high-strength steel rod is arranged in the upper column section and the lower column section, and the buckling-restrained energy dissipating plate is fixed to the connection of the upper columnsection and the lower column section. The post-earthquake self-recovery embedded energy dissipating steel column base has the advantages that two-way bearing is high, two-way energy consumption is high, two-way post-earthquake self recovery is carried out, the stress is simple and clear, excessive local stress after the column base is pried is avoided, on-site construction is convenient, the usefunction of the building cannot be affected.

The invention discloses a decorative sheet for coating. The decorative sheet comprises a decorative surface and a sheet body; the sheet body is located on the decorative surface and provided with coating grooves; and one surface of each coating groove is in a step shape. According to the decorative sheet for coating, a force bearing section is formed through the step-shaped surfaces, so that the strength for bending the decorative surface is relieved through the force bearing section when the decorative surface is bent, and a right angle even an acute angle can be formed when the decorative sheet is bent; original wood veneer coating is changed, and a base material is directly coated with the decorative sheet; and as the decorative surface can be subjected to paint surface processing through a roller painting technology, the paint spray technology can be achieved mechanically in a batch mode, and the processing convenience of furniture is greatly improved.

The invention relates to the technical field of polishing, and discloses an electrochemical polishing device and polishing method for a vascular stent. The polishing device comprises a lifting assembly, an anode assembly, an adjusting assembly and a cathode assembly; the lifting assembly comprises a lifting frame and a first driving mechanism; the anode assembly comprises an anode, an elastic piece, a vibration source and a metal wire which are connected in sequence; the metal wire is used for mounting the vascular stent and has a contracted state and an expanded state, wherein in the contacted state, the metal wire is movably connected with the vascular stent, and in the expanded state, the metal can be fixedly connected with the vascular stent; the adjusting assembly comprises a first supporting frame and a second driving mechanism, and the first supporting frame is connected with the metal wire and provided with a vertical position where the metal wire can be in the contracted stateand a horizontal position where the metal wire can be in the expanded state; and the cathode assembly is arranged below the anode assembly and comprises a polishing barrel containing a polishing solution and a cathode arranged in the polishing barrel. The electrochemical polishing device is simple and compact in structure, convenient to operate, uniform in polishing, good in polishing effect andhigh in efficiency.

The invention relates to a light mixing distance experimental device which is used for experimenting and determining the light mixing distance of a bottom lighting type backlight module. The light mixing distance experimental device comprises a fixing device, a bearing device and an adjusting device, wherein the fixing device is used for fixing a membrane of the bottom lighting type backlight module; the bearing device is used for bearing a light source of the bottom lighting type backlight module; and the adjusting device acts on the bearing device and is used for adjusting the distance between the bearing device and the membrane. The light mixing distance experimental device can be fittingly used with membranes of different manufacturers and different models, and using the light mixing distance experimental device avoids complex procedures of mounting and demounting a wrench and fixing auxiliary materials. Using the light mixing distance experimental device avoids outage during experiment, real-time adjustment and real-time luminous efficiency reflection are realized, testing and testing data accumulation are facilitated, and the variation relation between the light mixing distance and a membrane collocation scheme can be truly reflected.

The invention discloses a twisted waveguide. The twisted waveguide comprises a coupled zone, a signal channel A and a signal channel B, wherein the signal channel A and the signal channel B are communicated with the coupled zone. The signal channel A is provided with a port A, and the signal channel B is provided with a port B. An included angle X is formed between the normal of the center of the port A and the normal of the center of the port B and is larger than 20 degrees and smaller than 160 degrees. One or more matching transition sections are arranged in the signal channel A or the signal channel B. All upper surfaces of the twisted waveguide are flush with one another. One ore more metal bodies are arranged at the bottoms of the matching transition sections arranged in the signal channel A. Compared with the prior art, the twisted waveguide is simpler in structure and more convenient to machine, and assembly errors can be effectively reduced. The twisted waveguide is mainly used in communication systems, radar systems and the like with various microwave bands.

The invention relates to a concrete prefabricated groove. The concrete prefabricated groove comprises a groove body. The groove body is formed through opposite lap joint of two L-shaped components in parallel. A sewer pipe is perpendicular to the bottom of the groove body and is arranged at the lap joint position of the two L-shaped components. The upper portion of the groove body is covered with a cover plate. The concrete prefabricated groove can adapt to different cable trench widths, and the research and development number of dies is reduced. The size is small, the concrete prefabricated groove is easier to tidy and stack during transportation compared with U-shaped components, and the transportation cost is effectively reduced; and assembling is flexible, and the concrete prefabricated groove can adapt to the arrangement of different lines.

An anti-blue-ray protective film comprises a transparent substrate, an anti-blue-ray layer and a hardening protective layer, wherein the anti-blue-ray layer and the hardening protective layer are sequentially laminated; the anti-blue-ray layer is prepared by coating with a coating solution and then carrying out thermal curing, the coating solution comprises the following components in parts by weight: 2-10 parts of thermosetting resin, 0.5-3 parts of nano metal oxide, 80-98 parts of an organic solvent, 0.3-1.6 parts of a dispersing agent and 0.4-1.1 parts of a curing agent; the difference between the refractive index of the nano metal oxide and the thermosetting resin is 0.1-1.3, the viscosity of the thermosetting resin is 5000 cps-10000 cps, parameters in curing are successively as follows: in the first step, the curing temperature is 40 DEG C-60 DEG C, and the curing time is 1 min-5 min; in the second step, the curing temperature is 60 DEG C-90 DEG C, and the curing time is 1 min-5 min; in the third step, the curing temperature is 90 DEG C-110 DEG C, and the curing time is 1 min-5 min; in the fourth step, the curing temperature is 110 DEG C-150 DEG C, and the curing time is 1 min-3 min. According to the invention, an internal structure in which a high refractive index is matched with a low refractive index is formed, so that the transmittance of blue ray with the wavelength of 400 nm-450 nm is less than 40%, and a good anti-blue-ray effect is achieved.

The invention provides a one-step press forming process and a manufacturing method of a CPU (Central Processing Unit) back board. The one-step press forming process is a method which makes different thicknesses by a same material for one step, and comprises the following steps of: measuring the original thickness and area of a to-be-thinned part of the material so as to obtain the original volume of the to-be-thinned part of the material; calculating the thickness and area of the to-be-thinned part of the material after treatment so as to obtain the volume of the to-be-thinned part of the material after treatment; subtracting the volume of the to-be-thinned part of the material after treatment from the original volume of the to-be-thinned part of the material so as to obtain a to-be-removed volume; and removing the to-be-removed volume from the to-be-thinned part of the material; and pressing the to-be-thinned part of the material. The one-step press forming process provided by the invention has the advantages of simplifying a process and saving cost.

The invention discloses a preparation method of a SiC / ZrO 2 protective coating. The method includes the following steps that 1, raw material pre-mixing treatment is performed, wherein 32-85 parts by mass of micrometer-grade zirconia, 0.1-0.6 part by mass of micrometer-grade molybdenum disulfide, 12-38 parts by mass of polycarbosilane precursors and 5-35 mass parts of ethanol solution are weighed and put into a vacuum ball mill tank respectively, and uniform mixing is conducted; 2, vacuum ball milling is conducted, wherein the vacuum ball mill tank is vacuumized after raw material pre-mixing treatment, and a planetary ball mill is used for wet ball milling for 2-4 hours for continuous reaction; 3, discharge treatment is conducted, wherein cooling by reducing temperature is performed after the continuous reaction of the second vacuum ball mill treatment is completed, pressure relief, discharge and drying are conducted on the vacuum ball mill tank, ethyl alcohol is removed, and the SiC / ZrO2 protective coating can be obtained. The method has the advantages of low energy consumption, high production efficiency, good product consistency and small potential safety hazards.