35results about How to "High technology added value" patented technology

The invention relates to a preparation method of durable low-smoke halogen-free flame-retardant polyacrylonitrile fiber. The preparation method of durable low-smoke halogen-free flame-retardant polyacrylonitrile fiber is characterized by comprising the following steps: 1) blending spinning solution preparation: based on the mass parts of the polyacrylonitrile powder and the phosphorus-containing flame retardant, dissolving 65-80 parts of polyacrylonitrile powder and 20-35 parts of phosphorus-containing flame retardant into a 50-52wt% sodium thiocyanate aqueous solution, and mixing to obtain the blending spinning solution, wherein the ratio of the total mass of the polyacrylonitrile powder and the phosphorus-containing flame retardant to the mass of the 50-52wt% sodium thiocyanate aqueous solution is (10-15):100; 2) wet spinning; and 3) irradiation: irradiating primary flame-retardant polyacrylonitrile fiber in an electron beam accelerator with 0.5-5MeV or a <60>Co device to obtain the durable low-smoke halogen-free flame-retardant polyacrylonitrile fiber, wherein the irradiation dose is 20-50kGy. The fiber prepared by using the method has good flame-retardant durability and small smoke generation property.

The present application discloses a method and system for obtaining water quality data deduction based on machine learning. The method is divided into a model generation stage and a model deduction stage. In the model generation stage, the historical data of various characteristics collected by each monitoring station in the water area under study is analyzed and processed, and the independent relevant feature set of the target water quality factor and its corresponding historical data set are obtained. The machine learning method obtains the optimal derivation model of the target water quality factor; in the model derivation stage, the data of each feature factor covered by the independent relevant feature set for a certain period of time is collected, and the data is input into the optimal derivation model, and the target water quality factor of the period is calculated. The data. The present application is a new water quality data acquisition method that does not require traditional data acquisition methods such as chemical reagents and sensor detection, can reduce environmental pollution and hidden dangers caused by traditional water quality data acquisition methods, and has the advantages of low cost, safety, environmental protection and high technical added value.

The invention discloses a three-dimensional laser engraving machine, which includes a bracket, an FPGA control device, a transmission mechanism and a mechanical transmission device. The top of the bracket is provided with a guide rail, and the servo motor is connected to the slider. The right side of the bracket is A driver is fixed, the driver is electrically connected to the servo motor and the FPGA control device through wires, the slider is slidably connected to the guide rail, the servo DC rotary motor is electrically connected to the FPGA control device, and the servo DC rotary motor The output shaft of the laser is connected to a laser through a coupling, and the lower end of the laser is fixedly connected to the mechanical transmission device. The lower end of the mechanical transmission device is provided with a laser engraving head. The present invention has simple structure, simple operation, complex and accurate mathematical operations, It has outstanding advantages such as high rigidity, fast response, high precision, strong adaptability, high technical added value and strong flexibility.

The invention discloses a production method and a production system for a bevel gear, and belongs to the technical field of bevel gear production. The method comprises the following steps that (1), amaterial section conforming to requirements is prepared; (2), the material section is heated to 1150-1180 DEG C in a heating device; (3), the heated material section is rolled into a material cake ona blank making and swinging rolling device; (4), the middle of the material cake is rolled to form a center taper groove and is rolled to reach the preset thickness through the blank making and swinging rolling device; (5), a through hole is punched in the center taper groove through a punching device; (6), a ring expanding device is used for carrying out ring expanding to obtain an annular blank;(7), rolling and forming are carried out on the annular blank through a forming and winging rolling device to obtain a product blank; and (8), the product blank undergoes heat treatment and surface treatment to obtain a finished product. Through the method, the product with higher precision, the lighter weight, the better product quality and the smaller turning allowance can be obtained, and thecost is saved.

The invention relates to a method for synthesizing a micro-nanometer level hollow polymer ball, a carbon ball and a graphitized ball by one step. The method comprises the following steps that: hydroxybenzene and aldehyde are used as raw materials; lysine is used as a catalyst; fatty alcohol is used as a solvent; a polymer hollow ball with an even dimension can be produced by polymerization at a temperature of 80 DEG C; and the polymer hollow ball is further charred to produce a hollow carbon ball. If Fe<3+> is introduced into the polymer hollow ball, the polymer hollow ball is charred to produce a graphitized hollow ball. Through changing a molar ratio of the hydroxybenzene and aldehyde, the catalyst amount and the type of the solvent, the hollow carbon ball with a grain diameter of between 0.6 and 2 mu m can be produced. The micro-nanometer level hollow carbon ball has an even and controllable grain diameter, high purity, smooth surface, stable performance and high technical added value, is suitable for a load type magnetic separation catalyst, an absorption separating agent of pigment and organic molecule and a separating agent of protein and salt and is used as an electrode material of a super capacitor with high power density and high energy density.

The invention discloses a hybrid five-axis laser cutting machine and relates to a laser cutting machine with a parallel and hybrid five-axis driving mechanism. The hybrid five-axis laser cutting machine has the characteristics of more flexible structure, larger rigidity, smaller inertia and higher precision and comprises a machine body, an X-direction guide rail, a cross beam, a laser cutting head and a controller, wherein a Y-direction guide rail is arranged on the side surface of the cross beam, and the laser cutting head is movably connected with the Y-direction guide rail on the side surface of the cross beam through a hybrid device; and the hybrid device comprises a Y supporting plate mechanism, a Z supporting plate mechanism, a driving frame, an annular support frame, a pair of driving block mechanisms and a pair of connecting rods. The five-axis motion of the conventional laser cutting head is realized through the hybrid device. As for the hybrid five-axis laser cutting machine, the concept is ingenious, all parts have flexible structures, the rigidity is great, the inertia is small and the motion precision can be further ensured. The laser cutting machine is a product formed by combining the machine tool technology, the robot technology and the numerical control technology, and compared with a traditional series machine tool, the laser cutting machine is simple in structure and is complex and accurate in mathematical operation. The laser cutting machine has the outstanding advantages of large rigidity, fast response, high precision, strong applicability, high technical added value and the like.