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50results about How to "Good organizational performance" patented technology

Adjustable laser coaxial powder feeding nozzle

The invention discloses an adjustable coaxial laser nozzle for sending powder, comprising a laser head, a protection lens, a water-cooling sleeve for the protection lens and a column laser cavity arranged on the upper part, a coaxial conical laser cavity which is formed by the inner layer of a laser sleeve and arranged in the middle part, wherein a powder cavity, a secondary external protective cavity and an external water-cooling cavity are arranged on the lower part of the external part of the laser sleeve; the powder cavity is formed between the laser sleeve and a power cavity sleeve screwed together; the secondary external protective cavity is formed between the powder cavity and a protective air casing screwed together; the powder cavity and the protective sir casing are screwed together and adjustable between 1mm to 3mm; 4 to 6 power transmitting pipes and 4 to 6 air tubes are respectively positioned around the top parts of the cones of the powder cavity and the protective air cavity. The adjustable coaxial laser nozzle for sending powder has the advantages that the focus length of the focus lamp fit for the coaxial powder-sending nozzle is between 100mm to 300mm, which ensures convenient assembly and disassembly, even velocity, flexible adjustment of the powder converge diameter, convenient changeable lower coaxial conical parts (the powder cavity, the air casing and the water cavity).
Owner:XI AN JIAOTONG UNIV

Semantic net based large scale offline data analysis framework

The invention relates to a semantic net based large scale offline data analysis framework. The large scale offline data analysis framework includes a data acquisition layer, a body layer, a data storage layer, a semantic layer, a data analysis layer and an application layer. A data source includes dynamic data and static data, and the static data includes data and database internal logic semantic and structure type. The static data is established into a body model in the analysis framework; the static data is extracted and modeled, and then the static data orients a user or an upper analysis task in a semantic service manner. The large scale offline data analysis framework can effectively improve the ability to organizing multi-source heterogeneous offline data and has a uniform interface to upper data; and application users or data analysis workers can access a lower data source through a semantic interface without knowing all the information of different data sources, and relevant data information is acquired. The large scale offline data analysis framework can effectively update the whole data source from a global perspective by correction of the body structure having changed content and update and inference service built in an application tool.
Owner:TONGJI UNIV

Selective laser sintering SLS laid powder preheating device

The invention provides a selective laser sintering SLS laid powder preheating device. The selective laser sintering SLS laid powder preheating device comprises stand columns, lead screws, driving motors, an upper support, a lower support, height adjusting plates, infrared temperature measuring devices, a plurality of rectangular pyramid hollow shells and a control system, wherein each rectangular pyramid hollow shell, a heating rod inside the rectangular pyramid hollow shell and a reflector on the inner wall of the rectangular pyramid hollow shell form a corresponding independent preheating device; and the independent preheating devices divide a forming region into a plurality of small regions capable of preheating independently, are directly controlled by the control system and do not interfere one another. When temperatures of different regions of the laid powder are different, the independent preheating devices can be adjusted to preheat the different regions at different temperatures, so that the laid powder is integrally preheated uniformly; and the direction of each independent preheating device in three-dimensional space is adjustable, the preheating regions can be adjusted according to the size of a formed part, preheating efficiency is improved, and energy is saved. By the selective laser sintering SLS laid powder preheating device, the precision and the structure property of the formed part can be improved effectively; and the selective laser sintering SLS laid powder preheating device has an important significance on development of an SLS forming technology.
Owner:ZHONGBEI UNIV

Large-sized multi-nozzle pipe hot extrusion forming process formulation and mold design method

The invention discloses a large-sized multi-nozzle pipe hot extrusion forming process formulation and mold design method. Taking a double-nozzle pipe for example, the method comprises the following steps: determining the size of each part of an unmachined double-nozzle pipe after hot extrusion forming; determining the size of an initial pipe blank; determining the position of the center of a prefabricated hole and the size of the aperture; determining amount of compression in the axial direction of the pipe blank with the prefabricated hole, of which oxide skin is removed, required for finishing hot extrusion forming of a second nozzle; determining amount of compression in the axial direction of the pipe blank required for continuing to finish hot extrusion forming of a first nozzle; determining the dimensional parameter of a key part of the hot extrusion mold; selecting the structural form of the hot extrusion mold; determining the extrusion capacity parameter and selecting forming equipment; determining a technological flow of the double-nozzle pipe hot extrusion forming process. According to the method, a pipe inner hole and a nozzle inner hole can be directly formed, the structural strength at the nozzle is improved, the metal mechanic property and the structure property are improved, the manufacturing period is shortened, and the material utilization rate is improved.
Owner:UNIV OF SCI & TECH BEIJING

Adjustable laser coaxial powder feeding nozzle

InactiveCN101264519BImprove uniformityAvoid "short circuit" phenomenonLaser NozzleOptoelectronics
The invention discloses an adjustable coaxial laser nozzle for feeding powder, comprising a laser head, a protection lens, a water-cooling sleeve for the protection lens and a column laser cavity arranged at the upper part, a coaxial conical laser cavity which is formed by the inner layer of a laser sleeve in the middle part; wherein, a powder cavity, a secondary external protective cavity and anexternal water-cooling cavity are arranged on the lower part of the external part of the laser sleeve; the powder cavity is formed between the laser sleeve and a power cavity sleeve screwed together;the secondary external protective cavity is formed between the powder cavity and a protective air casing screwed together; the powder cavity and the protective air casing are screwed together and adjustable between 1mm to 3mm; 4 to 6 power transmitting pipes and 4 to 6 air tubes are respectively positioned around the top parts of the cones of the powder cavity and the protective air cavity. The adjustable coaxial laser nozzle for feeding powder has the advantages that the focus length of the focus lamp fit for the coaxial powder-feeding nozzle is between 100mm to 300mm, which ensures convenient assembly and disassembly, even velocity, flexible adjustment of the powder converge diameter, and convenient changeable lower coaxial conical parts (the powder cavity, the air casing and the water cavity).
Owner:XI AN JIAOTONG UNIV

Train operation scheme optimization compilation method and system

The invention belongs to the technical field of urban rail transit. The existing train operation scheme is difficult to balance the operation cost and the service level. The invention provides a train operation scheme optimization compilation method. The method comprises the following steps: matching passenger flows of the same type according to the type of a compiled operation scheme to obtain a characteristic day passenger flow so as to perform time period division and time period attribute determination of the operation scheme; according to operation scheme time period division and time period attributes, determining the train operation frequency and the route crossing scheme in each time period by taking the plan-to-which-belongs route operation train ownership as a main constraint; determining turn-back and stop schemes of each time period according to the time-sharing train operation frequency and the traffic scheme and by considering the spatial and temporal distribution characteristics of the passenger flow of entering and exiting the station on the characteristic day; and according to the passenger flow imbalance of each transfer direction of the transfer station, determining a main transfer direction, and carrying out networked connection adjustment on the first and last buses of the operation scheme. Automatic compilation of operation schemes including multi-route, multi-marshalling and special driving organization modes is realized and supported.
Owner:BEIJING JIAOTONG UNIV

Device conducting composite manufacturing on basis of laser technology

The invention discloses a device conducting composite manufacturing on the basis of a laser technology. The device comprises a sealed forming chamber, an inert protective gas source and a machining forming platform. The inert protective gas source is connected with the sealed forming chamber. The machining forming platform is arranged in the sealed forming chamber, and a light path selection system is arranged over the machining forming platform. A machining station is arranged on the machining forming platform, and the machining forming platform is arranged on a guide rail and can slide forwards and backwards through the guide rail. The light path selection system comprises a shock reinforcing independent laser light path, an additive independent laser light path and a subtractive independent laser light path. The light paths are arranged in the direction of the guide rail, and all the independent laser light paths do not share equipment and are arranged over the machining forming platform. According to the device, the laser shock reinforcing technology and the laser additive and subtractive technology are integrated, the forming precision, the surface quality, the organization performance and the residual stress state of a complex fine additive workpiece are improved, and one-stop high-efficiency high-precision and high-performance additive workpiece preparation is achieved.
Owner:SHANGHAI UNIV OF ENG SCI

Crystallizer cooling device and cooling method thereof

The invention discloses a crystallizer cooling device and a cooling method thereof. The crystallizer cooling device comprises a cooling jacket arranged on a crystallizer in a sleeved manner, and a cooling pipe is assembled on a cooling blind hole through a seal fixing sleeve; the cooling pipe comprises a water inlet pipe, the seal fixing sleeve and a water return pipe, and the seal fixing sleeve is arranged at one end of the water inlet pipe in the sleeved manner, and hermetically connected with the water inlet pipe; the other end of the water inlet pipe extends into the cooling blind hole, and a water return clearance is reserved between the other end of the water inlet pipe and the cooling blind hole; the water return pipe is fixedly connected with the side wall of the seal fixing sleeve, and communicates with the water return clearance through the seal fixing sleeve; the water inlet pipe communicates with a main water inlet pipe through an electric regulating valve, and the water return pipe communicates with a main water return pipe; an outlet pipeline of the water return pipe is further provided with a temperature measuring element, and the temperature measuring element and the electric regulating valve are connected with a PID temperature control regulating unit electrically; and closed-loop control over return water temperature can be achieved by the PID temperature control regulating unit through the electric regulating valve.
Owner:XIAN BRANCH ELECTRIC TECH

Die cushion special for aluminum alloy profile extrusion

The invention provides a die cushion special for aluminum alloy profile extrusion. The die cushion comprises two cooling channels, namely an outer cooling channel (3) and an inner cooling channel (5),and further comprises two liquid nitrogen channels, namely a first channel (2) and a second channel (9); the inner cooling channel (5) is located on the outer side of a profile extrusion channel (7)and is the same as the profile extrusion channel (7) in section shape, and the outer cooling channel (3) is located on the outer side of the inner cooling channel (5) and is round in the section shape; and the first channel (2) communicates with the outer cooling channel (3), the second channel (9) communicates with the inner cooling channel (5), the outer cooling channel (5) is connected with theinner cooling channel (3) through a first passageway (4), and the inner cooling channel (5) is connected with the profile extrusion channel (7) through a second passageway (6). According to the die cushion special for aluminum alloy profile extrusion, the temperature of a profile extrusion die and the temperature of an extruded profile can be effectively controlled, and contact between the profile and air is reduced, so that surface oxidation of the profile is prevented, the surface quality and the structure performance of the profile are greatly improved, meanwhile, the service life of the die is prolonged by 17%, and the extrusion speed of the profile is increased by 9%.
Owner:安徽生信新材料股份有限公司

Edge shielding device for sheet and strip steel cooling control system

The invention provides an edge shielding device for a sheet and strip steel cooling control system, and belongs to the technical field of rolling control and cooling control in the metallurgical industry. The device is installed on an upper cooler body in the sheet and strip steel cooling control system, and is composed of a driving device, a driving end frame, a driven end frame, a steel wire rope I, a steel wire rope II, a fixed pulley assembly, a water receiving disc assembly and a sliding rail, wherein two water receiving discs are controlled to be moved in the horizontal direction by adopting a steel wire rope traction mode, the temperature difference between the edge part and the middle part of the sheet steel in the water cooling process can be reduced, and the cooling uniformity and the overall performance of the sheet steel are improved. The device has the advantages of being high in high-temperature and high-humidity working environment adaptability, low in equipment failure rate and low in maintenance workload; the water outlet widths of the edge parts at the two ends of the upper cooler can be accurately adjusted on line, so that sheet steel with different specifications can be adapted; and the occupied space is small, the influence on other equipment is small, installation is convenient, and the popularization and application are easy.
Owner:UNIV OF SCI & TECH BEIJING

Extruding device and method for double-mouth and thick-wall pipe blank extrusion manufacturing

The invention provides an extruding device and a method for double-mouth and thick-wall pipe blank extrusion manufacturing, and belongs to the technical field of thick-wall pipe extrusion manufacturing. The device comprises an upper ejector rod, a lower ejector rod, an extrusion cylinder and a floating extrusion cylinder cover; the device is mounted on an extruder; the outer surface of the extrusion cylinder is tightened and fixed by the floating extrusion cylinder cover; the floating extrusion cylinder cover is connected with an extrusion cylinder oil cylinder; the upper end of the upper ejector rod is connected with an extrusion shaft of the extruder through a fixed plate; and the lower end of the lower ejector rod is connected with an extruder lower platform through a fixed plate. In the use process of the device, the upper ejector rod downwards moves for extrusion at a certain speed; meanwhile, the oil cylinder drives the floating extrusion cylinder cover to downwards move at a certain speed to realize synchronous formation of upper and lower pipe mouths. Compared with a traditional forging process, the method has such characteristics as short manufacturing flow, high efficiency, excellent performance and low cost, and can be applied to high-performance forming production of high-performance thick-wall pipes and pipe fittings with pipe mouths for nuclear power and thermal power.
Owner:UNIV OF SCI & TECH BEIJING

Manufacturing method of brake tube of air brake system

The invention belongs to the technical field of mechanical parts manufacturing, and particularly relates to a manufacturing method of a brake tube of an air brake system. The manufacturing method of the brake tube of the air brake system comprises the following steps of smelting molten steel, casting into die casting billet, electroslag remelting, cogging hot rolling into square billet, forging into round ingots, hot extrusion, lubrication cold rolling, annealing treatment, surface treatment, inspection and entering a storage; in the process of smelting molten steel, the molten steel is produced when the composition of the molten steel meets the following requirements, wherein the molten steel is prepared from the following components in percentage by weight: 0.02%-0.03% of C, 0.018%-0.028% of P, 17.2%-17.4% of Cr, 9.2%-9.5% of Ni, 0.001%-0.002% of S, 0.21%-0.28% of Ti, 0.05%-0.06% of N, 0.01%-0.15% of Cu, the balance of Fe and unavoidable impurities. According to the manufacturing method of the brake tube of the air brake system, through the special design of material ingredients and optimization of partial parameters and methods of hot extrusion, lubrication cold rolling, annealing treatment, surface treatment and the other processes, so that the brake tube of the air brake system has better corrosion resistance and surface quality.
Owner:HEFEI KANGZHIHENG MACHINERY TECH CO LTD

Device and method for simultaneous forming of double nozzles by uniaxial extrusion

The invention provides a single axis extruding device and method for forming double nozzles simultaneously, and belongs to the field of manufacturing of thick-walled pipelines with nozzles. The device comprises an extruder with a lifting oil cylinder and an extruding machine. The extruding machine comprises an upper ejector rod, a lower ejector rod, an extruding barrel and an extruding barrel jacket. The extruding device is mounted on the extruder. The lifting oil cylinder drives the extruding barrel jacket to move in the vertical direction. The extruding barrel is tightly hooped through the extruding barrel jacket and moves along with the extruding barrel jacket. According to the single axis extruding device, metal in blanks flow through extrusion of the upper ejector rod and the lower ejector rod. When extrusion is started, a cavity is filled with the metal, and the blanks and the extruding barrel move together through friction force; and after bulging is completed, the metal on the upper nozzle flows to the upper nozzle, the metal under the lower nozzle flows to the lower nozzle, and the speed of the metal between the upper nozzle and the lower nozzle is zero relative to that of the blanks. The extruding device can direct form pipeline inner holes and nozzle inner holes, the structure strength at the nozzles is improved, the metal mechanical and structural properties are improved, and the material utilization rate is increased.
Owner:UNIV OF SCI & TECH BEIJING

Constrained Radial-Axial Roll Forming Method for Large Thin-walled External T-shaped Ring Members

The invention relates to a constraining radial-axial roll-forming method for a large thin-wall outer T-shaped annular component. The constraining radial-axial roll-forming method comprises the following steps that S1, an annular prefabricated blank is placed in a constraint mold, the bottom face of the annular prefabricated blank is in contact with the lower end face in the constraint mold, and aradial feeding roll is arranged in the annular prefabricated blank; S2, at a radial rolling stage, after rolling is started, the constraint mold drives the annular prefabricated blank to uniformly rotate around the axis of the constraint mold at the rotating speed omega1, the radial feeding roll rotates around the axis of itself at the rotating speed omega2 and meanwhile does feeding motion at thespeed v1 in the radial direction, and an axial feeding roll uniformly rotates around the axis of itself at the rotating speed omega3 and does not do translational motion; S3, at an axial rolling stage, the constraint mold continues to uniformly rotate around the axis of itself at the rotating speed omega1, the position of the radial feeding roll is kept fixed, and the axial feeding roll starts tocarry out downward feeding at the speed v2 in the axial direction while uniformly rotating around the axis of itself; and S4, operation at a demolding stage is carried out. According to the constraining radial-axial roll-forming method, high-performance, high-efficiency, low-cost and near-net forming manufacturing of the large thin-wall complex annular component is achieved.
Owner:WUHAN UNIV OF TECH
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