55results about How to "No cutting" patented technology

The invention discloses a preparation method of a fastening bolt for an automobile wheel. The preparation method comprises the following processing steps: a, casting a raw material, wherein the raw material comprises the following chemical components in percentage by weight: 0.4 to 0.8% of C, 0.02 to 0.05% of Si, 0.18 to 0.21% of Mn, 0.16 to 0.18% of P, 0.05 to 0.07% of S, 0.05 to 0.15% of Cr, 0.05 to 0.12% of Ti, 0.11 to 0.13% of Cu, 0.01 to 0.02% of Al, 0.02 to 0.03% of Mg, and the balance of iron; and b, scouring the casted and formed rod material; carrying out line drawing on the rod material according to the requirement of the line diameter of the bolt, so that the rod material shrinks to the line diameter required by the bolt; cutting the rod material which is shrunk to the required line diameter to the length required by the bolt; placing the cut rod material into a die cavity at normal temperature; and using upsetting force to enable the dimensions of a head part and a rod part of the rod material to reach the requirements of the bolt. According to the preparation method of the fastening bolt for the automobile wheel, the bolt is processed by cold extruding process, so that the strength of the bolt is improved, the hardness value and the strength value required by the 12.9 high-strength bolt can be realized, and the delayed fracture and the fatigue fracture of the bolt at high strength can be solved; the fastening bolt is reliable in connection and hardly broken during use, prolongs the service life, and meets the usage demand of various industries in the society to high-strength bolts.

The invention discloses a preparation method of a high-strength T-shaped bolt. The preparation method is mainly characterized in that machining steps comprise T-shaped rod material casting and the like. The T-shaped rod material casting comprises that 12-14 parts by weight of waste iron are first fed into a medium frequency furnace to be melted into molten iron, when temperature inside the medium frequency furnace rises to 1000-1200 DEG C, 30-35 parts by weight of steel ingot, 30-35 parts by weight of cast iron and 12-16 parts by weight of foundry returns are then fed into the molten iron, and at the same time, a layer of warm-keeping covering agent is sprinkled on the surface of the solution for covering, then slagging is conducted, and when temperature inside the medium frequency furnace rises to 1400 DEG C for discharging, pouring is conducted. According to the preparation method of the high-strength T-shaped bolt, cold extruding technology bolt machining is adopted, so that the strength of the bolt is improved, a hardness value and a strength value needed by the high-strength bolt are achieved, and the problems of delayed fracture and fatigue fracture of the bolt under high strength are solved, and in the use process, connection is reliable, the bolt is not prone to fracture, service life of the bolt is prolonged, and use demands to the high-strength bolt in all industries in the society are satisfied.

The invention relates to an inner-diameter measuring head of a plunger sleeve, belonging to the technical field of pneumatic measuring. The split-type inner-diameter measuring head of the plunger sleeve is characterized in that the inner-diameter measuring head comprises a measuring head used as a measuring part and a positioning sleeve arranged at the periphery of the measuring head; the positioning sleeve is used for positioning and clamping, the measuring head and the positioning sleeve are two independent parts, the measuring head and an air inlet joint are connected into a whole, and the air inlet joint is connected with a float-type pneumatic gauge. As common materials are selected as far as possible on the basis that the functional requirements are met, the split-type inner diameter measuring head of the plunger sleeve is economical and needs no cutting or little cutting. With simple structure, light weight, easy manufacturing, convenient using, good safety, high reliability, good manufacturability, beautiful appearance, high production efficiency and low manufacturing cost, the split-type inner diameter measuring head manufactures parts meeting the using requirements with the least workload and the lowest processing cost,. Moreover, the material cost of the inner-diameter measuring head is greatly reduced.

The invention discloses a preparation method of a fracture-resistant steel rope bolt. The process includes following steps: a. casting rod material, wherein a blank of the rod material comprises, in terms of chemical component, by weight, 0.132%-0.260% of C, 0.62%-1.30% of Si, 0.25%-0.35% of Mn, 0.010%-0.030% of P, 0.010%-0.030% of S, 1.10%-1.50% of Cr, trace quantity-0.0018% of B, 0.012%-0.030% of Cu, and the balances are Fe and inevitable impurities; b. washing the rod material after casting molding in acid, conducting thread drawing for the rod material according to the requirement of thread diameter of the bolt to enable the rod material to shrink to the required thread diameter, cutting the rod material after thread diameter shrinks to the required length of the bolt, placing the cutting-off rod material into a mould shaped cavity which is covered by plant ashes at normal temperature, enabling the rod material to form a required head part and required size of a rod part of the bolt by applying upset forging force, and making screw threads on the periphery face of the rod part of the rod material through turning by using a precision lathe. According to the preparation method of the fracture-resistant steel rope bolt, cold extrusion process is applied to process the bolt, so that the strength of the bolt is improved, required hardness and strength of a high-strength bolt are reached, and the problem that delayed fracture and fatigue fracture of the bolt under high strength is solved. The bolt is reliable to use in connection, not easy to break, and the service life of the bolt is prolonged.

The invention discloses a preparation method of a high-strength steel cable bolt. The method includes the following steps: casting a rod material, throwing 10-14 parts by weight of waste steel into a medium frequency furnace, enabling the steel to be melted into liquid steel, adding a carbon addition agent, throwing 30-35 parts by weight of steel ingot, 30-35 parts by weight of cast iron and 12-16 parts by weight of returns into the medium frequency furnace after temperature in the medium frequency furnace is increased to 1120-1220 DEG C, conducting slagging and adding 0.4-0.6 part by weight of copper and liquid iron into a ladle to conduct pouring when temperature in the medium frequency furnace increases to 1450 DEG C and the iron is discharged. The preparation method of the high-strength steel cable bolt adopts the cold extrusion process to process the bolt, improves bolt strength, achieves the hardness and the strength required by 12.9 high-strength bolt, resolves the problems of delaying breaking and fatigue breaking of the bolt under high strength, prolongs service life of the bolt due to the fact that the bolt is reliable in connection and not easy to break in use, and meets using requirements of social industries for the high-strength bolt.

The invention discloses a method of forming powder metallurgy tool steel. The method includes a first step of conducting carbon-reduction and anneal on water atomization tool steel powder under the vacuum condition, a second step of evenly coating the surface of the powder with a layer of graphitic lubricant assisting in sintering, and obtaining mixed material after paraffins forming agent is mixed in, a third step of manufacturing material blank or part blank by compression moulding forming of the mixed material and dewaxing, and a fourth step of sintering the material blank or the part blank by a vacuum-pressure furnace. The powder metallurgy tool steel (high-speed steel) produced by the method is even and fine in formation, relative density of the tool steel reaches 99.5% and the density is close to be fully compact. Material performance is excellent, the powder metallurgy tool steel is close to isostatic pressing tool steel (high-speed steel) material in physical and mechanical properties, and the method of forming the powder metallurgy tool steel has the advantage of being low in cost, free from cutting, high in efficiency and capable of massively producing parts the same with powder metallurgy.

The invention discloses a method for machining a high-strength U-shaped bolt. The method comprises the following steps of: a, casting a U-shaped rod blank, and controlling the weight percentage of each chemical component of the rod blank to meet the following requirements: 0.28 to 0.35 percent of C, 0.25 to 0.35 percent of Mn, 0.05 to 0.09 percent of V, 0.15 to 0.35 percent of Si, 0.01 to 0.04 percent of W, less than or equal to 0.025 percent of P, less than or equal to 0.035 percent of S, 0.55 to 1.20 percent of Ni, 0.35 to 0.45 percent of Co, 0.20 to 0.30 percent of Sn, less than or equal to 0.20 percent of Al and the balance of iron; and b, forging a cast U-shaped rod at the temperature of between 650 and 700 DEG C for not more than 25 times, wherein a thin layer of graphite powder is coated on the inner wall of an impression of a forging die, and the granularity of the graphite powder is controlled to be 200 to 300 meshes; and turning an external thread of the bolt by using a precision lathe after forging. According to the method for machining the high-strength U-shaped bolt, the bolt is machined by adopting a cold extrusion process, so that the strength of the bolt is improved, the hardness value and the strength value required by the 12.9 high-strength bolt are achieved, the problems of delayed fracture and fatigue fracture of the bolt under high strength are solved, the bolt is reliable in connection during use and difficult to break, the service life of the bolt is prolonged, and the using requirement of each industry in the society for the high-strength bolt is met.

The invention discloses a preparation method of a high-strength aluminum alloy flange bolt. Machining steps comprise rod material casting and the like. The rod material casting comprises that 11-14 parts by weight of waste aluminum sectional materials are first fed into a medium frequency furnace to be melted into molten steel, carbon adding agents are then added into the molten steel, when temperature inside the medium frequency furnace rises to 650-700 DEG C, 32-42 parts by weight of A356 aluminium ingot, 30-35 parts by weight of cast iron and 12-16 parts by weight of foundry returns are then fed and at the same time, a layer of warm-keeping covering agent is sprinkled on the surface of the solution for covering, then slagging is conducted, after the slagging, alloy is added, and when temperature inside the medium frequency furnace rises to 1400 DEG C for discharging, pouring is conducted. According to the preparation method of the high-strength aluminum alloy flange bolt, cold extruding technology is adopted to machine the bolt, so that the strength of the bolt is improved, a hardness value and a strength value needed by the high-strength bolt are satisfied, and the problems of delayed fracture and fatigue fracture of the bolt under high strength are solved, and in the use process, connection is reliable, the bolt is not prone to fracture, service life of the bolt is prolonged, and use demands to the high-strength bolt in all industries in the society are satisfied.

The invention discloses a processing method for a high-class bolt. The processing method comprises the following steps: a) casting a rod blank and controlling the weight percent of all chemical components of the rod blank as follows: 0.27-0.34% of C, 0.45-0.65% of Mn, 0.05-0.15% of V, 0.15-0.35% of Si, 0.01-0.04% of W, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 1.55-2.00% of Ni, 0.65-0.95% of Co, 0.20-0.30% of Sn and less than or equal to 0.20% of Cu. According to the processing method for the high-class bolt provided by the invention, a cold extrusion process is adopted for processing the bolt, so that the strength of the bolt is increased, the hardness value and strength value required by the bolt with the strength being 12.9 are achieved, the problems of delay breakage and fatigue breakage of the bolt under high strength are solved, the connection is reliable during a use process, the bolt is difficult to break, the service life of the bolt is prolonged and the use requirement for the high-strength bolt in various industries is met.

The invention belongs to the technical field of aerators, and relates to an impeller aerator provided with a device for preventing hot air from flowing back in a water shield. A motor is arranged in a shell consisting of a conical body and the water shield; a supporting base of the motor is connected with the shell; a motor shaft is connected with an impeller shaft and vertically extends into water downward; a motor body is positioned over the horizontal pane; an isolation device for preventing the hot air of the motor from upward flowing back and entering a fan guard of the motor is arranged between the water shield and the motor so as to ensure that the hot air formed after the heat exchange of a cooling fan and radiating fins is not returned to the fan guard of the motor and the temperature of the motor is greatly reduced; the supporting base is connected with supporting rods; and the other end of each of the supporting rods is provided with a floating body respectively. The complete machine floats on the water surface to work through the floating bodies, and a water body lifted by an impeller is guided to various directions by using the conical body so as to ensure that lower-layer water fills a vacancy, so that the aim of oxygen increase is fulfilled through the convection of the water body. Structures such as gears, reduction gearboxes and the like which are required in the prior art are abandoned, lubricating oil is not required to be filled, the oil leakage is effectively prevented from polluting fishing ponds, and the production cost is reduced.

The invention discloses an embedded type information storage device with encryption and decryption functions, and a method for preloading digital asset management (Preload DRM). The preloading of the digital rights management can be customized according to the demands of clients. The device for preloading the digital rights management comprises encryption content and a protection interface which are pre-stored in the embedded type information storage device.

The invention belongs to the technical field of aerators, and relates to a speed reducing impeller-free aerator. A motor is arranged in a shell consisting of a cone and a waterproof cover; the motor is connected with the shell by a supporting seat; a motor shaft is connected with an impeller shaft and vertically downwards extends to the water; a motor body is positioned above the horizontal plane; an isolating device for preventing hot air of the motor from refluxing to a motor fan cover is arranged between the waterproof cover and the motor, so that the hot air formed after heat exchange of a cooling fan and radiating fins does not reflux to the motor fan cover, and the temperature of the motor is greatly reduced; the supporting seat is connected with supporting rods, and the other ends of the supporting rods are respectively provided with a floating body; and the whole aerator works by means of the floating bodies which float on the water surface, the water stirred up by the impeller is guided around by the cone, so that the water of the lower layer is complemented and the aeration purpose is fulfilled by water convection. According to the aerator, structures such as a gear, a reduction box and the like in the prior art are abandoned, lubricating oil is not needed, a fish pond is effectively prevented from being polluted by leaked oil, and the production cost is reduced.

The invention discloses a method of forming powder metallurgy tool steel. The method includes a first step of conducting carbon-reduction and anneal on water atomization tool steel powder under the vacuum condition, a second step of evenly coating the surface of the powder with a layer of graphitic lubricant assisting in sintering, and obtaining mixed material after paraffins forming agent is mixed in, a third step of manufacturing material blank or part blank by compression moulding forming of the mixed material and dewaxing, and a fourth step of sintering the material blank or the part blank by a vacuum-pressure furnace. The powder metallurgy tool steel (high-speed steel) produced by the method is even and fine in formation, relative density of the tool steel reaches 99.5% and the density is close to be fully compact. Material performance is excellent, the powder metallurgy tool steel is close to isostatic pressing tool steel (high-speed steel) material in physical and mechanical properties, and the method of forming the powder metallurgy tool steel has the advantage of being low in cost, free from cutting, high in efficiency and capable of massively producing parts the same with powder metallurgy.

The invention discloses a method for machining a T-shaped bolt. The method comprises the following steps of: a) casting a T-shaped rod material blank and controlling the weight percentage of all chemical components of the rod material blank to ensure that the rod material blank comprises 0.28 to 0.35 percent of C, 0.25 to 0.35 percent of Mn, 0.05 to 0.09 percent of V, 0.15 to 0.35 percent of Si, 0.01 to 0.04 percent of W, less than or equal to 0.025 percent of P, less than or equal to 0.035 percent of S, 0.55 to 1.20 percent of Ni, 0.35 to 0.45 percent of Co, 0.20 to 0.30 percent of Sb and less than or equal to 0.20 percent of Cu; according to the method for machining the T-shaped bolt, the bolt is machined by a cold extruding process, so that the intensity of the bolt is improved, the hardness value and the intensity value required by a 12.9 high-intensity bolt can be acquired, and the delayed fracture and the fatigue crack of the bolt under high intensity can be avoided; and during use, the bolt is reliable in connection, is not prone to break, and meets the using requirements of all industries in society on the high-intensity bolt; and the service life of the bolt is prolonged.

The invention discloses a method for machining a high-strength double end bolt. The method comprises the following steps of: a, manufacturing a rod blank, and controlling the weight percentage of each chemical component of the rod blank to meet the following requirements: 0.28 to 0.35 percent of C, 0.25 to 0.35 percent of Mn, 0.05 to 0.09 percent of V, 0.15 to 0.35 percent of Si, 0.01 to 0.04 percent of W, less than or equal to 0.025 percent of P, less than or equal to 0.035 percent of S, 0.55 to 1.20 percent of Ni, 0.35 to 0.45 percent of Co, 0.20 to 0.30 percent of Sb and less than or equal to 0.20 percent of Cu; and b, forging a cast rod at the temperature of between 850 and 800 DEG C for not more than 20 times, wherein a thin layer of fly ash is coated on the inner wall of an impression of a forging die; and turning an external thread at each of two ends of the bolt by using a precision lathe after forging. According to the method for machining the high-strength double end bolt, the bolt is machined by adopting a cold extrusion process, so that the strength of the bolt is improved, the hardness value and the strength value required by the 12.9 high-strength bolt are achieved, the problems of delayed fracture and fatigue fracture of the bolt under high strength are solved, the bolt is reliable in connection during use and difficult to break, the service life of the bolt is prolonged, and the using requirement of each industry in the society for the high-strength bolt is met.

The invention discloses a high-strength and soluble metal-based composite material at first. The high-strength and soluble metal-based composite material comprises the following elemental components in percentage by weight of 10-15% of Al, 50-60% of Mg, 25-30% of C and other trace elements and impurities. Meanwhile, the invention further discloses a method for preparing the high-strength and soluble metal-based composite material. The method comprises the steps of preparing materials in a mass ratio of (10 to 15): (50 to 60): (20 to 30): (10 to 20) of an aluminium metal powder to a magnesium metal powder to carbon fibers to additives; mixing the raw materials according to different preparation flows to prepare a slurry; carrying out injection molding on the slurry to obtain a sintered precursor; carrying out liquid medium removal treatment on the sintered precursor; and carrying out sintering molding on the dried sintered precursor to obtain the metal-based magnesium-aluminium composite material. The high-strength and soluble metal-based composite metal material provided by the invention is high in strength and soluble under a specific condition, and has the characteristics of being excellent in comprehensive mechanical performance and the like.