60results about How to "Guaranteed machinability" patented technology

A glass mould material of the alloy cast iron and a preparation method thereof belong to the technical field of the glass mould material. The mould material comprises the following chemical components by weight percent: 3.49-3.65% of carbon, 1.9-2.1% of silicon, 1-1.3% of nickel, 0.5-0.7% of manganese, less than 0.16% of sulfur, less than 0.3% of phosphorus, less than 0.08% of titanium, 0.36-0.5%of molybdenum, 0.36-0.6% of chromium, less than 0.05% of vanadium, less than 1% of copper, less than 0.02% of rhenium and the balance iron. By using the technical scheme, as the selection of chemicalelements and the element contents are reasonable, the alloy cast can has ideal oxidation resistance, heat dissipation performance and fatigue resistance and fine austenite grains and the generation of D-type graphite can be improved so as to increase the heat dissipation performance of the product; by using the preparation method provided by the invention, D-type graphite can be generated, the heat dissipation performance of the product can be ensured, and metal elements can be uniformly distributed in the matrix through solid solution, thus preventing metal elements from returning to the outside of the matrix and forming alloy carbide, and ensuring the machinability of the mould.

The invention discloses a production process for a stainless steel damping composite board, which comprises the following steps of: firstly, preheating a hot galvanizing cold-rolled steel sheet; secondly, rolling and adhering a macromolecular damping adhesive film on the preheated hot galvanizing cold-rolled steel sheet by using a film coating roller; thirdly, rolling and combining the stainless steel sheet on the macromolecular damping adhesive film by a sheet coating roller, heating the whole sheet body by a pressing roller at the same time and further performing rolling and adhesion to realize stable solidification; and finally, cooling the whole sheet body by using forced air cooling and rolling the cooled sheet to obtain the stainless steel damping composite board, wherein the stainless steel sheet is a surface plate, the hot galvanizing cold-rolled steel sheet is a base plate and the macromolecular damping adhesive film is a middle layer; the preheating temperature of the hot galvanizing cold-rolled steel sheet is 80 to 120 DEG C; the temperature of the film coating roller is 120 to 150 DEG C; the temperature of the sheet coating roller and the pressing roller is 170 to 220 DEG C; and the composite board is cooled to 20 to 30 DEG C by the forced air cooling. The process has the advantages that: the production is simple; the cost is low; and the product uses few stainless steel, has a high strength, and can damp and reduce noises and be produced continuously with low cost and high production process.

The invention relates to a high-strength non-quenched and tempered steel material suitable for a connection rod. The high-strength non-quenched and tempered steel material is characterized by comprising chemical elements of C, Si, Mn, P, S, Cr, V, N, Mo, Ni and the balance Fe and unavoidable impurities, wherein the element mass percents are as follows: C is 0.42%-0.50%, Si is 0.40%-0.70%, Mn is 0.90%-1.20%, P is 0.020% or less, S is 0.045%-0.075%, Cr is 0.20% or less, V is 0.10%-0.20%, N is 0.010%-0.020%, Ni is 0.2% or less, Mo is 0.10% or less, and the element mass percent is about 96.80%-98.10%; after the steel material is forged at the temperature of 1,250 DEG C into a test sample with the diameter phi being 30 mm and air-cooled, the mechanical performance data requirements of the non-quenched and tempered steel material are as follows: RP0.2 is larger than or equal to 700 MPa, Rm is larger than or equal to 1,000 MPa, A is larger than or equal to 10 %, and Z is larger than or equal to 25 %. After the steel material is forged, the strength level exceeds 1,000 MPa, the steel material has good toughness, swelling performance and machining performance, and the swelling connection rod manufactured and produced through the material has a relatively-high fatigue safety factor and accordingly has good application prospects.

The invention discloses a high-strength and high-conductivity CuCrZrMg series copper alloy wire. The high-strength and high-conductivity CuCrZrMg series copper alloy wire comprises the following components in percentage by mass: 1.5-15.0% of Cr, 0.1-2.5% of Zr, 0.05-1.0% of Mg and the balance being copper and inevitable impurities. In addition, the invention also discloses a preparation method ofthe high-strength and high-conductivity CuCrZrMg series copper alloy wire. The preparation method comprises the following steps: step one. carrying out fusion casting to obtain an ingot casting; steptwo. carrying out surface treatment and homogenization treatment on the ingot casting; step three. carrying out cold forging to obtain a bar, and then carrying out cold rotary forging to obtain a wire bar; and step four. drawing the wire bar to obtain the wire, and carrying out ageing treatment on the wire. The high-strength and high-conductivity CuCrZrMg series copper alloy wire has the beneficial effects that the wire is reasonable in design of the alloy components, high in alloying degree, appropriate in production cost, controllable in technology and environmentally-friendly and has highalloy strength and high electrical conductivity; and the high tensile strength and the high electrical conductivity can meet the requirements of high current connectors, electric power, machinery andelectronics and the like on high-strength and high-conductivity materials.

The invention discloses a sample adding needle for preparing micro-droplets. The sample adding needle comprises a liquid storage part and a liquid discharge part which are integrally formed in an injection molding mode and are communicated with each other, the liquid storage part is a circular truncated cone with the radial size gradually decreased in the direction towards the liquid discharge part, and the liquid discharge part is a circular truncated cone with the radial size gradually decreased in the direction away from the liquid storage part. The taper of the liquid storage part is C1, the taper of the liquid discharge part is C2, and C1 is smaller than or equal to C2. The wall thickness of the liquid storage part is D1, the wall thickness of the liquid discharge part is D2, and D1 is greater than D2. According to the sample adding needle for preparing micro-droplets, when the micro-droplets are prepared through the sample adding needle, the sample adding needle does periodic reciprocating motion with changed speed in oily liquid, so that the sample solution is subjected to periodic shearing force of the oily liquid at a liquid discharge opening, further, the sample solutionin the sample adding needle enters the oily liquid, and the generation of micro-droplets with uniform size and controllable volume is realized.

The invention relates to a preparation method of a polyvinyl alcohol based water-soluble nonwoven fabric, belonging to the technical field of textiles and chemical fibers. The polyvinyl alcohol based water-soluble nonwoven fabric is prepared by utilizing water and polyoxyethylene to synergistically plastify polyvinyl alcohol and carrying out melt spinning, online drafting and direct web forming. The preparation method is simple and pollution-free, is low in cost and has a wide range of application and high application value. The nonwoven fabric has a broad market application prospect in the fields of costume embroidery, disposable medical health care products, and the like.

The invention relates to a graphene super capacitor electrode sheet, especially relates to a low internal resistance and high power graphene super capacitor electrode sheet and a manufacturing methodand belongs to the new energy storage device technology field. The graphene electrode sheet comprises a current collector and a graphene electrode slurry. The graphene electrode slurry comprises, by weight, 75-93% of graphene, 2-10% of conductive agent and 5-15% of binder. The current collector is a coating aluminum foil. The thickness of the graphene electrode sheet is 100-200 microns, and a surface density is 0.5-0.7g / cm<3>. The super capacitor graphene electrode sheet has characteristics of a low internal resistance, high power and the like.

The invention discloses a blade design method of a gear workpiece end face continuous equidistant chamfering cutting tool, which comprises the following specific steps of: giving an included angle variable initial value phi between a gear tooth groove end face profile center line and a gear workpiece static coordinate system X axis; the angle theta c of the cutting tool rotating relative to the initial position when the cutting tool rotates around the rotation axis of the cutting tool is obtained through the installation parameters of the cutting tool and the gear workpiece, the variable initial value phi of the included angle and the transmission ratio i, and a transformation matrix Mcg and an inverse matrix Mgc from a cutting tool moving coordinate system to a gear workpiece moving coordinate system are obtained; a cylindrical gear tooth groove chamfering edge space curve c (u) is obtained, points on the gear tooth groove chamfering space curve c (u) are transformed to a cutting tool rake face SR through the transformation matrix Mcg, a cutting edge curve f (u) is obtained, and the cutting tool is machined through the obtained cutting edge curve f (u); the cutting tool with the designed cutting edge can ensure that chamfering structure cutting can be accurately carried out on the end face profile of the cylindrical gear under specified installation parameters and motion parameters.

A glass mould material of the alloy cast iron and a preparation method thereof belong to the technical field of the glass mould material. The mould material comprises the following chemical components by weight percent: 3.49-3.65% of carbon, 1.9-2.1% of silicon, 1-1.3% of nickel, 0.5-0.7% of manganese, less than 0.16% of sulfur, less than 0.3% of phosphorus, less than 0.08% of titanium, 0.36-0.5%of molybdenum, 0.36-0.6% of chromium, less than 0.05% of vanadium, less than 1% of copper, less than 0.02% of rhenium and the balance iron. By using the technical scheme, as the selection of chemicalelements and the element contents are reasonable, the alloy cast can has ideal oxidation resistance, heat dissipation performance and fatigue resistance and fine austenite grains and the generation of D-type graphite can be improved so as to increase the heat dissipation performance of the product; by using the preparation method provided by the invention, D-type graphite can be generated, the heat dissipation performance of the product can be ensured, and metal elements can be uniformly distributed in the matrix through solid solution, thus preventing metal elements from returning to the outside of the matrix and forming alloy carbide, and ensuring the machinability of the mould.

The invention discloses a K-waveband metamaterial coating microstrip antenna based on topological optimization and a design method. The microstrip antenna comprises an antenna substrate. The lower surface of the antenna substrate is provided with a metal grounding plate. A microstrip patch is arranged in the middle of the upper surface; a coaxial line feed probe is arranged on the microstrip patch; an antenna coating substrate is arranged above the antenna substrate in parallel. The antenna substrate and the antenna coating substrate are connected through a pillar. Wherein a plurality of metamaterial elements are etched on the antenna coating substrate, the metamaterial elements are of an array arrangement structure, each metamaterial element is dispersed into a square grid structure, each grid corresponds to one design element xi, and a set X of all the design elements xi forms a topological structure of the metamaterial elements. According to the invention, the problem of difficult matching of the metamaterial element and the microstrip antenna in the antenna design process is solved, and the antenna has the advantages of simple structure, convenient preparation and high gain.

The invention opened a preparing method of the cellulose fibre spinning stock solution. The solvent is the intermixture of the [BMIM]Cl and the [BMIM]BF4. The cellulose dissolves in the solvent after breaking up to get the uniform and transparent liquid. So it can save the energy, decrease the pollution and improve the quality of the stock solution.

The invention relates to a preparation method of a polyvinyl alcohol based water-soluble nonwoven fabric, belonging to the technical field of textiles and chemical fibers. The polyvinyl alcohol based water-soluble nonwoven fabric is prepared by utilizing water and polyoxyethylene to synergistically plastify polyvinyl alcohol and carrying out melt spinning, online drafting and direct web forming. The preparation method is simple and pollution-free, is low in cost and has a wide range of application and high application value. The nonwoven fabric has a broad market application prospect in the fields of costume embroidery, disposable medical health care products, and the like.

The invention discloses an ultra-thin flexible circuit board blind hole machining method. A raw material is a double-face flexible circuit board which comprises a face A flexible circuit board body, a face B flexible circuit board body and an insulating film attached to the position between the face A flexible circuit board body and the face B flexible circuit board body. The machining method includes the following steps of (1) punching the face B flexible circuit board body and (2) punching the face A flexible circuit board body. During single-face blind hole machining, double-face blind hole machining and machining of a product with a copper thickness of 12 micrometers or smaller than 12 micrometers, good machining performance and quality guarantee can be guaranteed during laser machining or other manufacturing procedures, and accordingly machinability of the product is guaranteed; reliability and the yield of the product can be greatly improved, and manufacturing cost is reduced.

The invention discloses a spatial position forming method and device based on additive manufacturing, and the method comprises the steps: carrying out the additive forming of a positioning foundation on a positioning tool, carrying out the three-dimensional scanning of the positioning tool and the positioning foundation, obtaining complete three-dimensional data, carrying out the reverse modeling, and obtaining a spatial position according to the reverse modeling data and the positioning reference of the positioning tool. According to the method, the spatial position of the workpiece is quickly positioned by utilizing a spatial positioning method, the spatial position of a forming model is quickly and accurately obtained based on three-dimensional scanning, and a forming process of additive manufacturing is generated for quickly repairing and remanufacturing the workpiece, so that the repairing efficiency and the repairing precision of the part are greatly improved; therefore, the problem that precise positioning of the absolute position of the workpiece space is difficult to achieve through additive manufacturing equipment is solved, the method plays a crucial role in workpiece repairing and remanufacturing, grafting printing can be achieved on existing additive manufacturing equipment, the equipment does not need to be transformed, and the cost is reduced. According to the method, batched, rapid and accurate forming can be carried out at the specified spatial position of the part.

The present invention provides a positive electrode slurry for manufacturing a positive electrode for a lithium secondary battery, a method for manufacturing the positive electrode slurry, a positiveelectrode for a secondary battery, and a secondary battery, the positive electrode slurry comprising a positive electrode active material, a conductive material, a binder, an overcharge prevention agent, oxalic acid, and a solvent, wherein 1 to 2 parts by weight of the overcharge prevention agent is included when the total solids weight of the positive electrode active material, conductive material, and binder of the positive electrode slurry is 100, 0.1 to 0.7 parts by weight of oxalic acid is included when the total solids weight of the positive electrode active material, conductive material, and binder of the positive electrode slurry is 100, and the positive electrode slurry has a viscosity of 4000 to 15000 cp at room temperature.

The invention discloses an ultra-thin flexible circuit board blind hole machining method. A raw material is a double-face flexible circuit board which comprises a face A flexible circuit board body, a face B flexible circuit board body and an insulating film attached to the position between the face A flexible circuit board body and the face B flexible circuit board body. The machining method includes the following steps of (1) punching the face B flexible circuit board body and (2) punching the face A flexible circuit board body. During single-face blind hole machining, double-face blind hole machining and machining of a product with a copper thickness of 12 micrometers or smaller than 12 micrometers, good machining performance and quality guarantee can be guaranteed during laser machining or other manufacturing procedures, and accordingly machinability of the product is guaranteed; reliability and the yield of the product can be greatly improved, and manufacturing cost is reduced.

The invention relates to an isostatic pressing method for refractory polybenzimidazole. The method includes steps of (1), cold isostatic pressing blank formation, specifically, polybenzimidazole molding powder is loaded into a flexible rubber sleeve in the air atmosphere and under a room temperature, and the flexible rubber sleeve is removed after pressing by a cold isostatic press to obtain the cold isostatic pressing blank; (2), packing sleeve welding and sealing, specifically, the cold isostatic pressing blank is put into a packing sleeve, a packing sleeve cover with a suction pipe is welded to the opening end of the packing sleeve, the packing sleeve is vacuumized through the suction pipe and then the suction pipe is sealed through a pair of hydraulic sealing pliers to obtain the workpiece to be pressed; and (3), hot isostatic pressing molding, specifically, the workpiece to be pressed is cooled to be 150 DEG C or below after being pressed by a hot isostatic press, and the packingsleeve is removed to obtain the refractory polybenzimidazole material. According to the method, the blank is obtained by adopting the cold isostatic pressing technology; sinter molding is competed through hot isostatic pressing technology at high temperature and high pressure; and the densification of the molding material is achieved by regulating and controlling the cooling rate after hot isostatic pressing to control the degree of crystallization of the polymer molecular chain.

The invention provides an electrostatic spinning method for a melt. The method comprises the steps that S1, an inorganic material is heated to a molten state to form the melt; S2, the melt forms fibers through electrostatic spinning. The method is suitable for electrostatic spinning taking inorganic materials of high melting points as raw materials. The technology is simple in technical process, the orientation of the fiber product is high, and the preparation process is environmentally friendly.