36results about How to "Increase material rate" patented technology

The invention discloses a natural mineral-based high-temperature anti-oxidation decarbonization coating. According to coating dry powder, the coating comprises the following components in percentage by weight: 15 to 35 percent of Al2O3, 35 to 55 percent of SiO2, 2 to 12 percent of Fe2O3, 2 to 10 percent of MgO, 3 to 10 percent of C, 5 to 20 percent of Na2O, 0 to 5 percent of CaO, 0 to 5 percent of K2O, and water which enables the density of the final coating slurry to be 1,100 to 1,500kg / m<3>. After the raw materials are weighed according to proportions, the water is added into the raw materials, the mixture is ground by a ball mill, the mixture is sieved by a 200-mesh sieve, and a binding agent, i.e. sodium water glass, and water are added into the mixture until the final density of slurry is adjusted to 1,100 to 1,500kg / m<3>. The coating can be directly coated onto the surface of a steel material to form a protecting layer, the oxidation burning loss of the steel material in a heating process can be obviously reduced, the surface quality of the steel material is improved, the cost is low, and the preparation process is simple.

The invention mainly belongs to the field of metal material preparation and machining and particularly relates to a rolling preparation method for a high-silicon electrical steel thin strip. The method comprises the steps of firstly, taking a high-silicon electrical steel casting blank heated in a furnace as the raw material, so that a high-silicon electrical steel plate slab is prepared and obtained, then conducting warm rolling on the high-silicon electrical steel plate slab in a stepwise-cooling mode, so that a high-silicon electrical steel warm-rolled strip is obtained, and conducting low temperature annealing and cold rolling on the high-silicon electrical steel warm-rolled strip, so that the high-silicon electrical steel thin strip is prepared and obtained. According to the rolling preparation method for the high-silicon electrical steel thin strip, warm rolling in a stepwise-cooling mode is adopted, the accumulated maximum warm rolling deflection is not influenced, meanwhile, the rolling temperature can be lowered, and a better toughening and plasticizing effect is obtained; after warm rolling is completed, annealing is conducted in the proper condition, residual tension of sides of the high-silicon electrical steel warm-rolled strip is effectively lowered, meanwhile, restoration of the ordered structure is avoided, and the cold rolling yield is raised.

The invention relates to the field of numerical control machinery, in particular to equipment for processing N-edge-shaped paper tubes. The equipment is used for producing paper strips to paper tubes, and is characterized by comprising a frame, a clamping fixture, at least two paper tube forming sets, a rotating servo motor and a traction servo motor, wherein the paper strips are wound on the clamping fixture in a staggered manner in sequence; the paper tube forming sets are used for forming the paper tubes, and comprise gears, gear rings and traction pressing wheel mechanisms; the traction pressing wheel mechanisms include upper and lower pressing wheels and traction wheels; the paper tube forming mechanisms transfer power through couplings, and produce the paper tubes with different shapes through changing relative positions of key slots of the couplings; the rotating servo motor is used for driving the gears to peripherally rotate in Y direction; and the traction servo motor drives the gear rings of the paper tube forming sets to peripherally rotate in Y direction through a differential transmission mechanism. The equipment can be used for producing the paper tubes with various shapes (such as triangles, rectangles and hexagons), is simple in dimension adjustment, needs no secondary cutting, and is high in yield, fast in production speed, high in efficiency and low in cost.

The invention discloses automatic positioning equipment for cutting. The automatic positioning equipment is used for positioning a cut part and comprises a first air cylinder, a second air cylinder, a third air cylinder, a fourth air cylinder and a fifth air cylinder; the first air cylinder and the second air cylinder are arranged on one side of the cut part, and the third air cylinder, the fourth air cylinder and the fifth air cylinder are arranged on the other opposite side of the cut part; a driving mechanism drives the first air cylinder, the second air cylinder, the third air cylinder, the fourth air cylinder and the fifth air cylinder; the front end of the first air cylinder is provided with a first push rod, the front end of the second air cylinder is provided with a second push rod, the front end of the third air cylinder is provided with a third push rod, the front end of the fourth air cylinder is provided with a fourth push rod, and the front end of the fifth air cylinder is provided with a fifth push rod; joint pressure of the first air cylinder and the second air cylinder is slightly larger than or equal to that of the third air cylinder, the fourth air cylinder and the fifth air cylinder; and the first push rod and the second push rod independently move, and the third push rod and the fifth push rod jointly move. When the cut part is positioned, the cut part cannot rotate or shift all the time, the cutting position is always vertical and cannot incline, and positioning is accurate.

The invention discloses a continuous casting method for steel resistant to sulfuric acid dew point corrosion. The technology comprises the following steps: (1) whole-process protection pouring is adopted in the continuous casting process, argon seal protection pouring is adopted for a large ladle long nozzle, wherein argon flow is 30~50 L / min, and an immersion type nozzle adopts a concave type nozzle, wherein the argon flow is 5~8 L / min; (2) the components of a covering agent adopted by the molten steel level of a middle ladle comprise, by weight, CaO and MgO with the total content greater than or equal to 52.0% but less than or equal to 58.2%, SiO2 with the content less than or equal to 30%, Al2O3 with the content less than or equal to 15%, T(C) with the content less than or equal to 3.5%, H2O with the content less than or equal to 0.5%, TFe with the content less than or equal to 2.0% and the balance ash with the density of 0.93+ / -0.05g / cm<3>; (3) a crystallizer uses low-carbon high-alkalinity casting powder, the content of free C is less than or equal to 1.0%, and binary basicity R is equal to CaO / SiO2, namely1.05~1.20; and (4) a pulling speed is controlled with 0.70~0.85m / min, the liquid level of the crystallizer is detected in a full-automatic mode, liquid level fluctuation is within 3.0mm, a continuous casting secondary cooling zone adopts a combination mode of electromagnetic stirring, light pressing and heavy pressing, and a cooling mode adopts front weak cooling and rear strong cooling. According to the continuous casting method, a surface crack of a casting blank can be reduced, a peeling process caused by the defect of the casting blank can be eliminated, the yield of the cast blank is improved, and the production cost is effectively reduced.

The invention relates to a high-temperature ordinary low-carbon steel anti-oxidation coating, which grinds ore powder, metallurgical waste, carbon-containing reducing agent, and inorganic binder including Al2O3, SiO2, Fe2O3, and other components to less than 100 meshes. , mix evenly, and then fully mix with water and stir evenly. The amount of water added is to finally adjust the density of the coating slurry to 1100-1500kg / m3. The coating can be directly sprayed on hot (below 1000°C) steel slabs before hot rolling into the furnace for heating, and can form a continuous protective coating under high temperature, which can effectively reduce the stress of slab transportation and soaking process before hot rolling. High-temperature oxidation burns, does not change the original properties of the billet substrate, and the coating has a strong ability to peel off naturally after heating; at the same time, the raw materials of the anti-oxidation coating are easy to obtain, the cost is low, and the preparation process is simple, which can be widely used in various steels at 800~ Anti-oxidation when heated at 1300°C / 2-10 hours.

The invention discloses a strip shape control method for dynamically changing the specification of the steel strip width of a cold tandem rolling mill, which comprises the following steps: during the control process of the dynamic specification changing of the strip steel width of a cold tandem rolling mill, the roll shifting mode of the middle roll is carried out in two stages ; The shifting of the intermediate rolls is to perform a roll shifting at the positions before and after the welding seam between the front and rear coils of strip steel respectively. The roll shifting method of the intermediate roll is implemented in two steps on the front and rear coils, and combined with the combined control strategy of bending force compensation, the control effect of the work roll and intermediate roll bending is improved, so that the cold-rolled steel coil can be rolled in the width The shape of the strip during the transition period is controlled; the ability to adjust the shape on-line can be improved to achieve the purpose of continuous rolling, and at the same time, the number of abnormal off-line rolls can be indirectly reduced, and the slab ratio of the unit can be improved.

The invention discloses an auxiliary processing device, comprising a base, a locating shaft, a carrier rod and a pin, wherein the base comprises a first supporting part provided with a sliding chute having an opening, and a second supporting part located at the end of the first supporting part; the first supporting part comprises at least two first supporting plates provided with the sliding chute; the locating shaft is movably arranged on the base through the sliding chutes; the carrier rod comprises a main cross rod, a first mounting part and a clamping part; the first mounting part and the clamping part are respectively arranged at both ends of the main cross rod; the carrier rod is fixedly connected with the locating shaft by the first mounting part; the pin is detachably inserted between the locating shaft and the second supporting part; and the pin is of a wedged structure. The auxiliary processing device provided by the invention can avoid the movement of the processing device, and the relative displacement of two processing devices or two components of the same processing device, thereby improving the yield of the device.