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107results about How to "Advanced manufacturing technology" patented technology

Multi-metal composite wear-resistant elbow pipe and preparation method thereof

The invention discloses a multi-metal composite wear-resistant elbow pipe and a preparation method thereof, wherein the inner side wall of the elbow pipe is formed through the composition of carbon cast steel on an outer layer and high-chromium iron on an inner layer, and is characterized in that the outer side wall of the elbow pipe is formed through the composition of three layers of different materials, namely a carbon cast steel outer layer (1), a high-chromium iron intermediate layer (2) and a wolfram carbide particle ceramic inner layer (3); the preparation method of the multi-metal composite wear-resistant elbow pipe comprises the following steps: foam model making, painting and baking, elbow pipe outer layer model packing, smelting, sand box vacuum pumping and pouring, taking out and cleaning castings on a carbon cast steel outer layer of the elbow pipe, elbow pipe interlayer model assembling, wolfram carbide particulate material paste painting, coating painting and baking, binning, smelting, sand vacuum pumping and pouring, taking elbow pipe castings out, cleaning and detecting, heat treating to the elbow pipe castings, detecting the hardness of the end surface of the multi-metal composite wear-resistant elbow pipe, and then warehousing; the prepared multi-metal composite wear-resistant elbow pipe has the advantages that the comprehensive mechanical property is excellent, the service life is long, the manufacturing technology is advanced, the maintenance and the installation are convenient, and a wide cost performance competition space is provided.
Owner:YANTAI BRANCH NO 52 INST OF CHINA NORTH IND GRP

Light high-speed amphibious submersible vehicle

The invention discloses a light high-speed amphibious submersible vehicle. The light high-speed amphibious submersible vehicle is composed of six system modules including a vehicle frame, a power module, a drive module, a buoyancy module, an electrical module and a control module, the vehicle frame module comprises a vehicle frame assembly, a suspension mechanism, a weapon hanger assembly and an outer cover assembly, and the power module comprises a drive motor, a guide pipe propeller, a power battery pack and a hydraulic station. The driving module comprises a transmission part, a differential mechanism assembly and a wheel assembly; the buoyancy module comprises a hull shell, a driver cabin, a buoyancy air bag, a high-pressure air storage tank and an oxygen supply device, the electricalmodule comprises a mobile power station, an air compressor station and an equipment box, and the control module comprises a land running control device, a water surface running control device, a submarine navigation control device, an instrument integration device and a wheel lifting control device. The vehicle adopts a plurality of unique advanced technologies, has excellent amphibious maneuvering and underwater navigation performances, and can better meet a plurality of actual requirements in military and commercial fields.
Owner:益阳天华两栖车艇有限公司

Preparation method of instant gracilaria agar with low freezing point

ActiveCN104829753AReduce the melting temperature and solidification temperatureBroaden the field of applicationEnzymeSeaweed food
The invention discloses a preparation method of an instant gracilaria agar with a low freezing point. The preparation method comprises the following steps: taking gracilaria as the raw material, removing the salt and sand from gracilaria by a roller, processing gracilaria by alkali, acidifying and bleaching the gracilaria, cooking gracilaria to obtain gel, crudely filtering the gel, cooling to a temperature of 55 DEG C to obtain an agar crudely-filtered solution; then processing the solution by a compound enzyme preparation, heating to inactivate the enzyme, carrying out fine filtration, condensing the solution under vacuum, adding alcohol into the solution to trigger flocculation, separating the solid from the liquid, drying the solid in vacuum, grinding the solid, and sieving so as to obtain the instant gracilaria agar with a low freezing point. In the agar crude filtration step, a compound enzyme preparation is added to process the gel solution so as to maximally degrade the alga fibers, and thus the enzyme preparation can be completely inactivated more easily. The alcohol is used to flocculate the gel solution, thus the safety and hygiene of the gracilaria agar can be guaranteed, and at the same time the yield of agar is increased. The technologies of diaphragm press filtration and vacuum drying can guarantee that alcohol is fully recycled and utilized. The freezing point of the prepared agar is not higher than 30 DEG C, the agar can be completely dissolved in 10 minutes at a temperature of 80 DEG C, the extraction yield is not less than 15.5%, the lead (Pb) content is not more than 0.5 mg/kg, the arsenic (As) content is not more than 0.3 mg/kg, and the total number of bacterium is not more than 1000 cfu/g.
Owner:FUJIAN PROVINCE LVQI FOOD COLLOID

Structure of IGBT inverter welding machine with two welding functional modules

ActiveCN106112214AProtection Circuit StructureProtection Design StructureArc welding apparatusMachine controlTransformer
The invention relates to a structure of an IGBT inverter welding machine with two welding functional modules. The structure comprises an outer housing and an inner circuit board; the circuit board mainly comprises six parts which are separately a drive plate, a control panel, a current detecting plate, an IGBT plate, a fast recovery circuit board and a panel control board; the control panel is connected to the panel control board, a control transformer and the drive plate; the control transformer is used for supplying power to the control panel; the drive plate is connected to the control panel, the IGBT plate and the current detecting plate; and under the action of the control panel, the drive plate generates a drive signal which can reliably drive each IGBT to work, so that stable operation of an inverter circuit is guaranteed. According to the structure, the performance problem, the reliability problem, the production efficiency problem and the manufacturing and transporting cost problem of multifunctional welders are solved very well by adopting a control circuit system consisting of a two-chip micro processor, a single-chip micro processor and the like and optimizing the structural design of a welding machine control circuit, the structural design of a circuit board and the structural design of each part, so that market competitiveness of products is improved.
Owner:ZHEJIANG KENDE MECHANICAL & ELECTRICAL

Composite preparation die made from high-performance wrought magnesium alloy

The invention discloses a composite preparation die made from high-performance wrought magnesium alloy. The composite preparation die integrates alloy melting, high specific pressure speed-control condensation, reducing extrusion and equal channel angular extrusion and specifically comprises a cavity, an extruding cavity, a reducing extrusion belt and an equal channel angular extrusion cavity which are sequentially connected, the upper end of the cavity is provide with a convex die matched with the cavity, a movable insertion plate is arranged in an extruding cavity area at the lower end, theperiphery is provided with an inner sleeve and a heating sleeve wrapping the inner sleeve, the heating sleeve is uniformly provided with 6-8 heating tubes in the peripheral direction, the periphery isprovided with a circular cooling chamber, thermocouples are arranged in the cavity, the heating sleeve and the circular cooling chamber, the thermocouples, the heating tubes and the circular coolingchamber are jointly controlled by a control system, and real-time acquisition and adjustment of die temperature are achieved. The composite preparation die can achieve accurate control of process parameters in a whole preparation period while die-change-free continuous production including alloy melting, cooling and pressure machining, and finally the high-performance wrought magnesium alloy material is obtained.
Owner:SOUTHWEST UNIVERSITY
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