Control method for zero adjusting rollers in universal type rolling mill

Amorphous alloy, alloy preparation method and alloy workpiece

The invention provides an amorphous alloy, the composition of the amorphous alloy is PraCubNicAldNbeMf, and the element M is one or a combination of more of Ag, Y and Ti; 55 < = a < = 72, 7 < = b < = 25, 7 < = c < = 20, 7 < = d < = 18, 3 < = e < = 8, 1 < = f < = 5, and a, b, c, d, e and f are atomic percentages corresponding to alloy elements; the amorphous alloy further comprises inevitable impurities. The invention further provides a preparation method of the amorphous alloy and an amorphous part prepared through the method. The amorphous alloy can be prepared into an amorphous part with high forming ability by adopting metal raw materials with industrial purity, and the amorphous part is not sensitive to the oxygen content in the preparation process, so that the limitation on process conditions in the vacuum casting process is loose, the industrialization cost is reduced, and the production efficiency is improved. Good industrial application prospects are realized.

Jamming treatment method for H-beam straighteners

The invention discloses a jamming treatment method for H-beam straighteners. The method includes the steps of 1, determining a jammed driving roll; 2, powering off the jammed driving roll; 3, relieving operation linkage of a main straightening roll; 4, setting an operating mode of a straightener which jams; 5, reversely straightening a discharge port rolled piece, and impacting a jamming rolled piece; 6, positively straightening the discharge port rolled piece and discharging the rolled piece out of the straightener; 7, pouring out the jamming rolled piece by inching; 8, if the jamming rolled piece still cannot be poured out of the jammed driving roll of the straightener, appropriately increasing press-straightening quantity between the driving roll and a driven roll which are not jammed by the rolled piece, and pouring out the jamming rolled piece by repeating the steps 5, 6 and 7 for single to double operations; 9, treating a jamming steel section; 10, recovering normal operation state ...

Synthesis in situ of intermetallic compound nano-particle

The invention provides an in situ synthesis method for an intermetallic compound nano particle, which belongs to the technical field of synthesizing a nano particle material. The method is characterized in that tin or magnesium and alloy micron powder which are low in melting point as well as a metal and alloy micron powder which are high in melting point are taken as materials; the materials are evenly mixed and pressed into a block target material which is used as a self-consumption anode; in the mixing atmosphere of active and inert gases, by utilizing a plasma heat source, the block target material is evaporated and subjected to gas-liquid-solid phase change; and the tin based and magnesium based binary or multiple intermetallic compound nano particle is prepared on the normal position. The method has the advantages of adopting the composite block target material, and synthesizing the intermetallic compound nano particle on the normal position, and has the characteristics of simple ...

LED circuit board and device thereof, and device preparation process

The invention relates to an LED circuit board, a device thereof and a device preparation process. The LED circuit board comprises a substrate, a front bonding pad unit and a back bonding pad unit, a first bonding pad group of the front bonding pad unit comprises a plurality of first front bonding pads, each first front bonding pad is connected with the same first front connecting bonding pad, a second bonding pad group of the front bonding pad unit comprises a plurality of second front bonding pads, and each second front bonding pad is connected with the same second front connecting bonding pad; the back bonding pad unit comprises a plurality of back bonding pads, the first back bonding pad is connected with the first front bonding pad, the second back bonding pad is connected with the second front bonding pad, and the third back bonding pad is connected with the first front bonding pad and the second front bonding pad at the same time. And each first front surface bonding pad and each ...

Iron-based powder metallurgy material, powder metallurgy processing method and workpiece

The invention provides an iron-based powder metallurgy material which comprises iron-based powder and an adhesive, and the iron-based powder comprises the following components in percentage by mass: 5-9% of Mo, 6-9% of Co, 7-9% of Cr, 5-7% of Ni, 0.2-0.8% of Si, 0.1-0.2% of Cu, less than or equal to 0.1% of C and the balance of Fe and inevitable impurities. The invention further provides a powder metallurgy machining method, and in the forming process, the forming temperature ranges from 170 DEG C to 175 DEG C, the injection pressure ranges from 90 MPa to 95 MPa, and the pressure maintaining time ranges from 15 s to 20 s. The invention further provides a powder metallurgy part and a hinge part manufactured through the powder metallurgy machining method. The powder metallurgy part provided by the invention has excellent rotation performance, wear resistance, high strength, high elongation and high impact toughness, and is particularly suitable for being used as a hinge part and a part with ...

Special fish tail-shaped double processor

The invention discloses a special fish tail-shaped double processor which belongs to a machining tool, particularly relates to a special tool for processing products in special shapes. The special fish tail-shaped double processor is characterized in that a T-shaped body is symmetrically provided with two power drilling devices and two workpiece clamping devices, the power head bases of the power drilling devices are installed on two longitudinal linear guides fixed to the body, the front ends of power heads which are driven by a motor are provided with tool heads and tappers, and the side surfaces of the power head bases are provided with driving devices which enable the power heads to be along the longitudinal linear guides; each of the workpiece clamping devices comprises fixture seats which are arranged on two horizontal linear guides fixed to the body, the front ends of the fixture seats are provided with hydraulic chucks and grip cylinders for controlling the switching of the chucks ...

Powder metallurgy material for precision part, powder metallurgy processing method and part

The invention provides a powder metallurgy material for precision forming, which comprises iron-based powder and an adhesive, and is characterized in that the iron-based powder comprises the following components in percentage by mass: 16-18% of Cr, 10-14% of Ni, 2-4% of Mo, 0.3-1.0% of Si, 0.1-0.3% of Co, less than or equal to 0.03% of C, less than or equal to 0.03% of S, less than or equal to 0.03% of P and the balance of Fe and inevitable impurities. The invention further provides a machining method using the powder metallurgy material, and in the forming process, the forming temperature ranges from 165 DEG C to 175 DEG C, the injection pressure ranges from 90 MPa to 95 MPa, and the pressure maintaining time ranges from 15 s to 20 s. The invention further provides a powder metallurgy workpiece which is manufactured through the machining method, and the workpiece has excellent mechanical property and surface property, so that the workpiece reaches the optimal balance state in various different ...

Biohazard assessment visualization method based on Google map

The invention relates to a biohazard assessment visualization method based on a Google map. The method comprises the following steps: 1) taking a Bernoulli curve function as a biohazard particle simulated aerosol diffusion model; 2) expressing the aerosol diffusion model as a polar coordinate form; 3) drawing an aerosol diffusion curve by using the GPolygon class of Google Maps API, and obtainingan actual hazard area corresponding to the aerosol diffusion curve by using getArea (); 4) dividing the actual hazard area into a plurality of areas, arbitrarily acquiring the longitude/latitude coordinates of a point in each area, then judging which county the area belongs to by a getLocations () function of Google Maps; 5) invoking the population density data of the county from a database of Google Maps, and multiplying the population density data by the area of the county so as to obtain the number of harmed people in the county; and 6) adding the numbers of harmed people in the divided areas ...

Control system for shape steel intensive pressure water cooling high-pressure variable-frequency water pumps

The invention relates to a control system for shape steel intensive pressure water cooling high-pressure variable-frequency water pumps. The control system comprises a water spraying valve state monitoring unit, a high-pressure variable-frequency water pump running number limiting unit, an automatic pump-stop pulse signal generation unit, a first high-pressure variable-frequency water pump start and stop control unit, a second high-pressure variable-frequency water pump start and stop control unit and a third high-pressure variable-frequency water pump start and stop control unit. The automatic pump-stop pulse signal generation unit sends output signals of itself to the first high-pressure variable-frequency water pump start and stop control unit. The water spraying valve state monitoring unit sends output signals of itself to the second high-pressure variable-frequency water pump start and stop control unit. The high-pressure variable-frequency water pump running number limiting unit sends ...

Hyperspectral image sequence dimensionality reduction method based on target and background segmentation

The invention discloses a hyperspectral image sequence dimensionality reduction method based on target and background segmentation. The method comprises the following steps: determining a target local region Lt and a search region St of a tth frame of hyperspectral image after normalization; determining a spectrum average value; determining a local spectrum curve Cl, and determining a local spectrum average value Cli; subtracting Lt from St to obtain an unknown region Rt; determining a spectral curve Cu of an unknown pixel in the Rt, and determining a gray value Cuij; subtracting Cli from Cuij to obtain an error epsilon ij; determining problem wavebands by using the error epsilon ij and the gray threshold beta, and counting the number of the problem wavebands; marking the pixels of which the number of problem wavebands is smaller than a bandwidth threshold eta as target pixels, and defining a set of the target pixels as a target area Ot; calculating a target average spectrum curve Co of ...

Amorphous alloy casting and processing method thereof

The invention provides an amorphous alloy casting which is provided with an inner buckling structure, and the ratio of the maximum depth, facing a casting body, in the inner buckling structure to the maximum height in the inner buckling structure is smaller than or equal to 2. The inner buckle structure comprises one or more of an inner buckle right-angle structure, an inner buckle fillet structure, an inner buckle bevel angle structure, a multi-directional concave structure or a multi-directional hole structure; and/or the maximum depth, facing the casting body, of the inner buckling structure is smaller than or equal to 3 mm. The invention further provides a machining method of the amorphous alloy casting.

On-the-spot epidemiological information collection method based on Google Maps

The invention relates to an on-the-spot epidemiological information collection method based on Google Maps. The method comprises the following steps: 1) a set of framework system comprising a client and a server end is built; 2) the on-the-spot investigation personnel start the system client procedure by a handheld device; 3) the on-the-spot investigation personnel conduct epidemiological information collection and reporting through an information collection and reporting module; 4) the information collection and reporting module calls the GPS positioning module in the client automatically so as to obtain the current longitude and latitude information, and then send the longitude and latitude information to the server end; 5) the server end receives the information sent back by the client through the information processing module, and inputs the date to a data storage module; 6) the data storage module stores the information sent back by the client to a data base; 7) the geographic information ...

Hyperspectral video target tracking method based on depth spectrum cascade texture features

The invention discloses a hyperspectral video target tracking method based on depth spectrum cascade texture features, which comprises the following steps of: obtaining a spectral curve of a local region of a tth frame of hyperspectral image, subtracting a spectral curve of an unknown region pixel from the spectral curve of the local region, segmenting the image into a target region and a background region, and importing a (t + 1) th frame, the method comprises the following steps: acquiring a spectral curve of each pixel point in a search area, performing dimension reduction processing on the spectral curve to obtain a band image after dimension reduction, extracting a depth feature and a texture feature of the image, acquiring a weight of each spectral channel according to an image signal-to-noise ratio curve, multiplying the weight with the corresponding texture feature to obtain a spectral cascading feature, covering the spectral cascading feature with a set mask, and obtaining a target ...

Bone conduction earphone

The utility model provides a bone conduction earphone. The device comprises a connecting piece, a first rotation adjusting mechanism and a first sounding part, wherein the connecting piece is used forbeing supported on the head or ears of a wearer, the first rotation adjusting mechanism is connected with the connecting piece, the first sound production part is connected with the first rotation adjusting mechanism, and the first sound production part is used for being in lap joint with the tragus part on one side of the wearer; the first rotation adjusting mechanism drives the first sound production part to rotate and press the tragus part on one side of the wearer, so that the tragus part seals the external auditory canal of the wearer. According to the bone conduction earphone of the utility model, the first rotation adjusting mechanism drives the first sounding part to rotate to press the tragus part of a wearer; the eardrum part seals the external auditory canal of a wearer, on onehand ...