34results about How to "Guaranteed thickness accuracy" patented technology

The invention relates to a resin composition used for forming a dielectric layer of a dielectric substrate for an antenna. The resin composition comprises (A), epoxy resin containing a naphthalene nucleus or diphenyl structure, (B), any one of or a mixture of at least two of tri(4-hydroxyphenyl) methane type epoxy resin, o-cresol type novolac epoxy resin and phenol type novolac epoxy resin, (C), a resin fusion viscosity modifier, and (D), spherical ceramic powder after presintering treatment. With the adoption of the resin composition, the obtained dielectric substrate has a high dielectric constant, high peeling strength, a low thermal expansion coefficient and very good thickness consistency, and can meet a performance requirement of the high dielectric constant antenna substrate.

The invention provides a steel strip for an LED bracket and a manufacturing method thereof. The steel strip comprises the following chemical compositions by mass percent: 0.03%<=C<=0.07%, 0.01%<=Si<=0.03%, 0.2%<=Mn<=0.3%, 0%<P<0.02%, 0%<S<0.02%, 0.01%<=Al<=0.035% and the balance of Fe, as well as a trace of inevitable impurities. Repeated tests and trials show that the LED steel strip completely satisfies the quality requirements on the strength, the rigidity and the extensibility, which ensure that the LED bracket is free from cracks after being punched and bent for 6 times, and at present, the LED steel strip gains popularity of customers; and as the LED new material cold-rolled strip has a very wide development prospect, the popularization and application values are extremely high and the prospect is very wide.

The invention relates to an extrusion moulding method for shaft parts with flanges, and a special extrusion mould. The adopted extrusion moulding method comprises the following steps: 1, placing a blank material in a female die, wherein the extrusion moulding mould comprises an external male die with a center hole extending along the axial direction, an internal male die is arranged in the center hole of the external male die in a penetrating manner, the hole wall of the center hole of the external male die is matched with the peripheral wall of the internal male die in a guiding sliding manner, a corresponding power output shaft of a press drives the external male die to extrude the blank material and downwards moves to reach the thickness of the flange of the required part; 2, ejecting the external male die to be kept stable on the blank material, wherein the press and a power output shaft which is in transmission connection with the corresponding internal male die drive the internal male die to downwards extrude the blank material, and the required part is formed through extrusion; and 3, completing the extrusion, wherein the press drives the external male die and the internal male die to return to eject the formed part. According to the extrusion moulding method, by adopting sequential extrusion moulding, the one-time extrusion area is small, the extrusion force required by one-time extrusion is small, the input of equipment is reduced by adopting the equipment with small tonnage, and the production cost is lowered.

The invention relates to a cold-rolling strip steel used for an automobile flywheel processed by precision stamping and a manufacture method thereof, which solves the technical problems that the manufacture cost of the cold-rolling strip steel used for precision stamping is high, the high strength and toughness of the cold-rolling strip steel are not matched, and the precision stamping moulding cannot be satisfied. The cold-rolling strip steel comprises the following chemical components by mass percentage: 0.49-0.54% of C, 0.15-0.30% of Si, 0.70-0.90% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.10-0.20% of Cr, 0.015-0.040% of Alt, and the balance of iron and unavoidable impurity. The structure is composed of block ferrite, granular pearlite and a few of sheet-shaped pearlite, the yield strength of the cold-rolling strip steel is 410-460 MPa, and the percentage elongation after fracture A50 is 25-33%. The cold-rolling strip steel is used for fine blanking of the automobile flywheels.

The invention provides a steel strip for deep drawing of a household electric appliance panel film. The steel strip comprises the following chemical components by mass percent: 0.01 percent<=C<=0.03 percent; zero percent<Si<=0.02 percent; 0.1 percent<=Mn<=0.25 percent; zero percent<P<=0.02 percent; zero percent<S<=0.025 percent; 0.02 percent<=Al<=0.05 percent; and the balance of Fe. The high-hardness steel strip for a household electric appliance panel totally meets the quality requirements for strength, hardness and elongation of refrigerator panel steel based on many tests and trial use, is popular among clients, and has popularization application value and broad prospect as the cold rolled strips for household appliances have a very broad development prospect.

The invention provides semi-processed non-oriented silicon steel. The silicon steel comprises following chemical components by mass: not more than 0.005% and not less than 0 of C, not more than 0.8% and not less than 0.15% of Si, not more than 0.4% and not less than 0.2% of Mn, more than 0.02% and less than 0.1% of P, more than 0% and less than 0.01% of S and not more than 0.1% and not less than 0.03% of Al, with the balance being Fe. The thickness of the silicon steel is 0.35-0.65 mm, the width is 1000-1250 mm, and the surface roughness Ra is 0.4-1.0 [mu]m. Through a plurality of tests and trials, the silicon steel fully meets quality requirements on iron loss and magnetic induction for motors. After secondary annealing and blueing, the performance can be improved by two levels. The silicon steel is favored by users at present. As the development prospect of the motor industry is wide, the silicon steel is high in popularization and application value and has a wide prospect.

The invention provides a high-hardness steel belt for home appliances. The chemical component of the high-hardness steel belt includes, by mass, 0.06%<=C<=0.13%, 0.03%<=Si<=0.25%, 0.2%<=Mn<=0.4%, 0%<P<0.025%, 0%<S<0.025%, 0.01%<=Al<=0.05%, and the balance of Fe. After many tests and tries, the high-hardness steel belt completely meets quality requirements for strength, hardness and elongation of high-hardness steel for side plates of refrigerators, is quite popular with customers, and has high popularization and application values and wide prospect since cold-rolled steel belts for home appliances are quite wide in development prospect.

The invention provides a wide steel strip for a paper cutting blade. The wide steel strip is characterized in that the content of the chemical components of the steel comprises, by weight, 0.43%-0.47%of C, 0.17%-0.28% of Si, 0.7%-1.0% of Mn, 0-0.035% of P, 0-0.035% of S, 0.15%-0.3% of Cr, and the balance Fe; and the thickness of the wide steel strip 0.45-1.42mm, the width is 23-35 mm. According to the wide steel strip for the paper cutting blade, through repeated testing and trial, requirements of the steel for the paper cutting blade for the strength, the hardness, the size precision, the straightness and the quality requirement of the spheroidized structure can be completely met, and the wide steel strip has been favored by customers at present; and due to the fact that the developmentprospect of the cold-rolled wide steel strip for the paper cutting blade is very wide, the wide steel strip has great popularization and application values and is quite wide in prospect.

The invention discloses a thickness measuring method for cold rolling strips, which comprises an industrial control computer, inlet thickness setting, outlet goal setting, an inlet thickness meter, an outer thickness meter, inlet calculating and comparing, outlet calculating and comparing, feedforward control, feed backward control, a PLC (Programmable Logic Controller) system, a servo valve and a hydraulic device. The X-ray thickness measuring method without a radioactive source is adopted to input the inlet thickness setting and outlet thickness setting of strip steel through the human-computer interface of the industrial control computer, ensuring that the thickness precision of the cold rolling strips conforms to the quality requirement.

The invention discloses a cold-rolled steel strip for saw-chain cutter teeth, wherein the cold-rolled steel strip comprises the following chemical composition by mass: 0.61%=<C=<0.72%; 0.15%=<Si=<0.30%; 0.30%=<Mn=<0.40%; 0.10%=<Cr=<0.20%; 0.90%=<Ni=<1.10%; 0%=<Mo=<0.02%; 0.03%=<Ni=<0.05%; 0%<P=<0.02%; 0%<S=<0.01%; and the balance Fe. A target product can be obtained from hot-rolled raw materials through hot rolling, cold rolling, annealing and cutting. The test result of the final product meets the target value of the customer demand and is 95% or more. The cold-rolled steel strip for a saw chain has broad development prospects and great promotion and application value.

The invention discloses a preparation method for a TA15 titanium alloy thin strip. The preparation method comprises the following steps of 1, carrying out single-strip reversible hot rolling in the first rolling process; 2, carrying out butt welding; 3, carrying out vacuum annealing heat treatment after acid-alkali washing and longitudinal shearing and splitting treatment; 4, carrying out reversible strip rolling in the second rolling process; 5, carrying out vacuum annealing heat treatment after cleaning and longitudinal shearing and splitting treatment; 6, carrying out reversible strip rolling in the third rolling process; 7, carrying out vacuum annealing heat treatment after cleaning and longitudinal shearing and splitting treatment; 8, carrying out reversible strip rolling in the fourth rolling process; 9, carrying out cleaning and longitudinal shearing and splitting treatment; and 10, carrying out annealing treatment so as to obtain the TA15 titanium alloy thin strip. According to the preparation method, a four-roller reversible hot rolling mill and a Sendzimir twenty-roller cold rolling mill are adopted, plate laser butt welding is combined, rolling of one hot rolling process and three cold rolling processes is carried out in sequence, and therefore the rolling efficiency is improved, the yield is increased, the cost is lowered, the number of the rolling processes is decreased, and the thickness precision of the TA15 titanium alloy thin strip with the thickness ranging from 0.3 mm to 0.6 mm is guaranteed.

The invention discloses a lithium ion battery cover with an explosion-proof function, and the cover comprises a battery cover plate and an explosion-proof membrane arranged on the battery cover plate;a closed area is formed between the explosion-proof membrane and the battery cover plate, a sharp object is arranged in the closed area, and the sharp end of the sharp object points to the explosion-proof membrane. The technical problem that an existing battery cover is poor in anti-explosion consistency is solved; when excessive gas is generated in the battery, the explosion-proof membrane bulges outwards to touch the sharp object to be punctured, so the internal gas is released, and the battery is prevented from exploding; by adopting the scheme, the thickness of the explosion-proof membrane can be slightly thicker than that of a conventional explosion-proof membrane, on the one hand, the thickness precision of the thicker explosion-proof membrane is easier to guarantee, and the explosion-proof precision is greatly improved; on the other hand, it is ensured that the explosion-proof membrane cannot be crushed by internal gas before colliding with a sharp object, the consistency of explosion-proof indexes of the lithium ion battery can be kept, and the explosion-proof membrane has the advantages of being simple in structure and good in explosion-proof effect.

The invention provides precise forming equipment and method for a large-area viscoelastic material film. The film forming equipment comprises a rack, a mixing extrusion device, a movable bed, a cushion block, a pressing plate, a rolling device and a control system. A thin film material is extruded onto the movable bed, the rolling device is controlled to uniformly distribute and pre-press the thin film material, and the pressing plate is controlled to move to the cushion block to uniformly press the thin film material to a preset thickness. According to the thin film forming equipment, the thin film forming equipment control method and the thin film forming method, the requirement for precise forming of a large-area viscous-elastic material thin film in the pharmaceutical industry can be met, the thin film can be rapidly and evenly formed, continuous production can be achieved on the premise that the thickness precision of the thin film is guaranteed, the labor intensity of operators is reduced, and the production efficiency is effectively improved.

The invention relates to a cold-rolled silicon steel thickness control method and device based on full-process data, and the method comprises the steps: for a certain cold-rolled steel coil, monitoring AGC is used by default in the first pass, before the cold-rolled steel coil enters a cold-rolling mill process for production, the production process and quality data of the previous full process of the cold-rolled steel coil are obtained, pre-identification is carried out, and if the performance fluctuation of silicon steel is found, the cold-rolled steel coil is determined; if yes, the first pass additionally uses the second flow AGC; if it is found that the silicon steel thickness fluctuation is not violent, the feedforward AGC is additionally used for the first pass. According to the method, manual interference is not needed, the optimal AGC production mode can be automatically determined before production by adopting the rule, the thickness precision of a silicon steel product is ensured, and the defect of the silicon steel thickness index is avoided.