30results about How to "Solve the difficulty of production" patented technology

The invention relates to a method for precisely casting a titanium alloy and a titanium aluminum alloy with low cost, which relates to a method for precisely casting the titanium alloy and the titanium aluminum alloy, and solves the technical problem that cast pieces have low surface quality and internal quality in the conventional method for lowering the cost of precisely casting the titanium alloy and the titanium aluminum alloy by using electrically-fused alumina and silica sol. The method comprises the following steps of: preparing a surface layer binder from zirconium sol, silica sol, a wetting agent JFC, n-octyl alcohol, polyvinyl alcohol and latex; adding calcium carbonate, alumina, titanium dioxide and zirconia to prepare a surface layer coating; preparing a shell surface layer; preparing a shell back layer by a universal method for precisely casting the titanium alloy; dewaxing and sintering to obtain a shell; and casting the titanium alloy or the titanium aluminum alloy by using the shell so as to obtain a titanium alloy cast piece or a titanium aluminum alloy cast piece. Compared with a precise casting method by purely using a zirconium-based binder and a zirconia fireproof material, the method has the advantage that raw material cost is lowered by 30 to 70 percent and the method can be used for civil titanium alloy cast pieces and titanium aluminum alloy cast pieces for common aviation.

The invention discloses a real-time calibration and frequency measurement method for time base frequency and a device thereof, wherein the method comprises the following steps: 1) calibration step: a frequency measurement device acquires an external high-accuracy standard-frequency signal with Fs of given frequency as a calibration signal; the actual frequency value measured by the frequency measurement device is Fs'; a calibration factor K which is equal to Fs/Fs' is calculated and stored, and the calibration factor K can not be updated until the next calibration step is finished; 2) measurement step: the frequency of the unknown signal measured by the frequency measurement device is Fx', and the calculated and revised frequency value of the unknown signal Fx is equal to K * Fx'; 3) the process returns to step 1). The method and the device can ensure that, the time base frequency can be as accurate as 5E-10 and the second gate time frequency measurement can be as accurate as 1E-9 when measuring frequency and the accuracy of the measured frequency can be determined, thereby solving the problems of undetermined frequency timing base frequency accuracy, low precision, and the like of the prior art.

The invention discloses a high efficiency concrete composite admixture, which comprises the following components: by weight, 5%-20% of triethanolamine, 10%-15% of sodium lignin sulfonate, 2% - 3% of a naphthalene-series high efficiency water reducer, 1% - 2% of bone glue, 5% - 15% of tartaric acid, 2% - 3% of rosin, 3% - 5% of sodium dodecyl benzene sulfonate, and the balance of water. The high efficiency concrete composite admixture has the advantages of simple process and excellent performances.

The invention provides a harmonic mixer with low local oscillator power in an embodiment. The harmonic mixer comprises a mixer diode DC bias circuit and a low-loss local oscillator intermediate-frequency duplexer, wherein the mixer diode DC bias circuit comprises a diode pair (2) composed of two diode junctions, two structurally symmetrical low-loss thin-film capacitors (6), a DC decoupling filter circuit composed of two decoupling capacitors (3), two plate capacitors (4) and two high-capacitance broadband capacitors (5) of a symmetrical structure, and a DC resistance bias network (11); the low-loss local oscillator intermediate-frequency duplexer comprises a local oscillator matching filter (10), a local oscillator input waveguide (8) to a suspended stripline waveguide probe transition circuit (9) and an intermediate-frequency low-pass filter (7), all of which are orderly connected with each other. The harmonic mixer with low local oscillator power is capable of realizing low variable-frequency loss and noise coefficient properties under the condition of low local oscillator power; as a result, the problems of technical indices of the existing solutions and the manufacturing difficult and the cost of a local oscillator frequency doubling chain are solved.

The invention discloses a cover plate type fiber bragg grating sensor and a packaging method thereof. The cover plate type fiber bragg grating sensor comprises a grating and a protection sleeve, wherein a wire jumper and tensile fibers are fixed in the protection sleeve. One end of the protection sleeve is fixedly connected with a flange interface, and the other end of the protection sleeve is fixedly connected with a temperature sensing box. The grating is packaged in the temperature sensing box, the wire jumper and the grating are connected with each other in the temperature sensing box. The packaging method of the cover plate type fiber bragg grating sensor includes preparing the sleeve, painting temperature-resistant AB glue, welding the wire jumper and the grating in fusion mode, leading the wire jumper to penetrate through the protection sleeve, fixing one end of the wire jumper not provided with the grating with the flange interface, arranging the grating at the central position of a sensing protection groove, and buckling a packaging cover plate on the sensing protection groove. Compared with the prior art, the cover plate type fiber bragg grating sensor is good in mechanical performance, sensor performance, insulation performance and firmness, and improves sensor firmness, data collection accuracy and data collection speed. The packaging method of the cover plate type fiber bragg grating sensor greatly improves production efficiency and production survival rate, simultaneously improves sensor firmness and enables the sensor not to split or fall easily.

The composition of high-efficiency composite additive for concrete is formed from (wt%) triethanolamine 10-50, sodium metnylene bis-naphthalene sulfonate 20-50, bone glue 4-8, tartaric acid 10-20, rosin 3-6, stearic and 8-10 and water 105-210. Said invention is low in cost, small in addition quantity, easy to transport and store and convenient for operation and construction, and said additive can resist the corrosion action of preembedded metal, can improve plasticity and workability of concrete, can greatly reduce water gain and segregation and can make poured concrete more homogeneous and compact, etc.

The present invention discloses a touch detection method and apparatus for a touch screen and the touch screen. The apparatus comprises a display panel, a sensing circuit and a control circuit, wherein the sensing circuit comprises at least two sensing loops. The method comprises: performing charging and discharging potential detection on each sensing loop in the sensing circuit at a preset frequency, and acquiring potential values of both ends of each sensing loop; comparing a variation value, when each potential value changes, with a preset threshold, and determining whether an object touches the touch screen; and when the variation value of each potential value exceeds the preset threshold, carrying out calculation to obtain a sensing capacitance value of a sensing capacitance formed between the object and the touch screen when the object touches the touch screen, and a resistance value between the contact point and the sending port in the sensing circuit. According to the touch detection method and apparatus for the touch screen and the touch screen provided by the present invention, the technical problem in the prior art of high manufacturing cost and manufacturing difficulty caused by a large number of sensing loops, sending ports and receiving ports on the touch screen is solved.

The invention provides a welding bracket. The welding bracket comprises three rectangular base surfaces and seven welding surfaces, wherein the three rectangular base surfaces comprise a first rectangular base surface (1), a second rectangular base surface (2) and a third rectangular base surface (3); the seven welding surfaces comprise a first welding surface (4), a second welding surface (5), a third welding surface (6), a fourth welding surface (7), a fifth welding surface (8), a sixth welding surface (9) and a seventh welding surface (10); and the different welding surfaces are connected with the different base surfaces. The welding surfaces are used for welding the welding bracket to a rear stringer assembly structure, a sill inner plate rear section assembly structure and a rear floor front extension plate assembly structure of a vehicle body, among which gaps exist, so that the gaps among the three assembly structures are filled through the welding bracket provided by the invention. The welding bracket provided by the invention solves the problem that a special-shaped beam is difficult to produce when the special-shaped beam is adopted to fill the gaps in the prior art.

The invention provides a photographic fixing device which includes a heating element and a roller, the heating element is arranged for emitting heat energy, and the roller comprises a hollow tube body and an air turbulence structure. The hollow tube body is annularly arranged on the outer side of the heating element, and at least partially coats the heating element, an annular region is defined between the hollow tube body and the heating element, and the air turbulence structure is formed on the inner wall of the hollow tube body, and is arranged for disturbing air to convect in the annular region during rotation of the hollow tube body to promote heat transfer efficiency of heat transfer to the hollow tube body, so that the effects of improvement of the heat transfer efficiency and homogeneous temperature distribution of the roller surface can be achieved so as to effectively reduce the power wattage and energy consumption of the heating element.

The invention discloses a preparation method for a three-dimensional porous lithium ion battery negative electrode sheet. The preparation method is used for producing the three-dimensional porous lithium battery negative electrode sheet. A negative electrode sheet roll material is prepared by a porous copper foil roughening process, a water washing process, a three-dimensional porous copper foil surface passivation process and a coating process. According to the preparation method, before a porous copper foil is subjected to unwinding and coating, a three-dimensional roughening groove is firstdesigned on the surface of the copper foil, and the surface of the copper foil is subjected to three-dimensionally shaped small particle nodulation to increase the specific surface area of the surface of the copper foil and increase the contact area with an active material, the mechanical adhesion is improved, and meanwhile, the roughness of the copper foil is basically maintained unchanged. In the three-dimensional roughening process, the porous characteristic of the copper foil continues to be maintained. After further passivation, the surface of the copper foil is directly squeezed for drying by a squeeze roller but not dried, the copper foil is directly subjected to the slurry coating process, and after the coating is completed, the copper foil enters into the drying and winding process. The preparation method effectively solves the preparation difficulty problem of the three-dimensional porous lithium ion battery negative electrode sheet, improves the adhesion, integrates the foil material three-dimensional stresses and the negative electrode sheet preparation, can efficiently and quickly produces the negative electrode sheet, and saves energy and reduces consumption.

The invention discloses a composite bow integrated double-main-string static force symmetrical balance hanging string pulley block system, and relates to the technical field of composite bow design, production and manufacturing and debugging detection. The composite bow integrated double-main-string static force symmetrical balance hanging string pulley block system comprises an overall assembly, wherein the overall assembly comprises a first pulley block and a second pulley block, and placing grooves are formed in the surfaces of the outer walls of the first pulley block and the second pulley block. According to the composite bow integrated double-main-string static force symmetrical balance hanging string pulley block system, hanging points of the first pulley block and the second pulley block are newly designed, so that only one integrated bowstring is used for being converted into two integrated bowstrings which are symmetrical left and right in a penetrating mode, so that distinguishing is not needed during production, manufacturing and assembling, and the cost is reduced; and one integrated bowstring is used, the structural layout of the two integrated bowstrings is achieved, the limitation of the left-right and deflection freedom degrees of the integrated bowstring is achieved, and the same tensioning degree of the two integrated bowstrings can be achieved without using an additional floating balance block, so that the problems of shooting precision caused by the freedom degree of the integrated bowstring, the number of the integrated bowstring, the manufacturing cost of the floating balance block and the assembling and debugging difficulty are solved.

The invention provides a rotating speed alarm method and device, electronic equipment and a storage medium, which are used for carrying out rotating speed early warning and protection on an engine, and the method comprises the following steps: obtaining feature information of the engine, the feature information of the engine comprising a current rotating speed value and identification informationof the engine; determining an early warning rotating speed value of the engine according to the identification information of the engine; judging whether the current rotating speed value of the engineexceeds the early warning rotating speed value or not; if the rotating speed value reaches the early warning value, controlling an alarm to give an alarm; and if the rotating speed value exceeds theearly warning value and reaches the maximum value, opening the exhaust brake butterfly valve for braking.

The invention discloses a processing device and a processing method of a Chinese zither panel. A bracket is arranged in a main cabin of the device, a plurality of fixed support plates are arranged on the bracket, each fixed support plate is provided with a Chinese zither panel forming mechanism, and the Chinese zither panel forming mechanism comprises a lower template, an upper template and a hydraulic device; a counter bore is formed in the center of the top of the lower template, a boss is arranged in the center of a bottom face of the upper template, the lower template is arranged in the counter bore of the fixed support plate, and the shape of a cavity formed after the upper template and the lower template are closed is the shape of a formed Chinese zither panel; the hydraulic device is used for applying downward pressure from an upper part of the upper template; locking devices are arranged on the two side faces of the zither panel forming mechanism and used for locking a covering state of the upper template and the lower template. By using the device, steam is introduced into the cabin to soften wood, and pressure is slowly applied to the upper template; and finally, after cooling and drying, the device is opened to obtain the formed Chinese zither panel. According to the processing device, problems of difficulty and cost in manufacturing the Chinese zither panel are solved, and the processing time is shortened.