1523results about How to "Guaranteed size" patented technology

The invention discloses a method for estimating a phase deviation in a precise single-point positioning technology, which comprises the steps of: firstly, carrying out parameter estimation on single-difference non-ionized layer combined ambiguity by using a position as a restraint condition according to data of a reference station in a tracking network; secondly, carrying out parameter estimationon single-difference wide-lane ambiguity by adopting an M-W combination, separating out a decimal part of the single-difference wide-lane ambiguity, and carrying out decimal deviation calculation by using a directional data statistic theory, modifying and fixing the single-difference wide-lane ambiguity as an integer; thirdly, resolving a single-difference L1 ambiguity floating point solution according to a single-difference non-ionized layer ambiguity estimation value and a single-difference wide-lane ambiguity integer solution, separating the decimal part, carrying out decimal deviation calculation by using the direction data statistic theory; and finally, broadcasting the wide-lane and the L1 phase deviation decimal part to a user of a roving station so as to be used for fixing the single-difference integral ambiguity solution of the wide lane and the L1 and further obtaining a PPP (Point to Point Protocol) static solution.

A method of protecting a cementitious mixture from freeze damage is provided. The method consists of incorporating an entrainment air composition into the cementitious mixture to form air voids in the concrete, and further adding an effective agent for nucleating ice, preferably, in the air voids, such that upon the freezing of concrete formed from the cementitious mixture, ice is nucleated in the air voids. In one embodiment, the air entrainment composition includes ceramic shells, which could be impregnated with an agent for nucleating ice such as metaldehyde.

The invention discloses an environmental protection restoration device for municipal landscaping soil, which comprises a processing box, the processing box is a cylindrical body, a feeding pipe is arranged at the upper left end of the processing box, a feeding hopper is arranged at the upper end of the feeding pipe, and a feeding hopper is arranged at the upper end of the feeding pipe. There is a crushing roller in the bucket, a crushing motor is fixed in the middle of the upper end of the processing box, a crushing shaft is set at the output end of the crushing motor, movable crushing knives are arranged symmetrically on both sides of the crushing shaft, and several fixed crushing knives are arranged in an array inside the processing box. The knives, the fixed pulverizing knives and the movable pulverizing knives are distributed at cross intervals. The structure of the invention is simple and reasonable, the shock absorption effect is good, and it is easy to carry. The size of the soil particles when mixed with the remediation fluid helps to ensure the remediation effect of the soil, and the unqualified soil will enter the collection box, and then be sent back by the lifting cylinder, so as to realize the circular crushing of the soil, which has strong practicability.

The invention relates to one method and device to process disable by contact impact on circuit board, which comprises the following steps: fixing circuit board; heating on circuit board; adopting impact structure on circuit board for contact impact; adopting blower and collecting element parts and welding; after cooling processing the sort of circuit board and elements. The device comprises impact lever, compression spring, circuit board fix device, protruding wheel, guide rail, spring net band, and hot wind entrance hole.

The invention provides a large-power intelligent dimming multiple-output power supply for suppressing electric surge with a field-effect transistor. The power supply comprises an electric surge suppression unit, an LLC (Inductor-Inductor-Capacitor) resonance conversion unit, a synchronous rectification unit and more than one constant-current-output intelligent dimming unit, wherein a power resistor in the electric surge suppression unit is connected in parallel with the source electrode and the drain electrode of a field-effect transistor, and the loss of an electric surge suppression circuit is very low due to the extremely small on-resistance of the field-effect transistor so that the whole efficiency of the power supply is improved. The invention acquires the output efficiency up to 95 percent by the optimization design of parameters of an LLC resonance network, the constant-current-output intelligent dimming unit circuit of the invention increases the mean value of the output current by increasing the duty cycle of an output current when sensing infrared rays of a human body; and otherwise, the constant-current-output intelligent dimming unit circuit decreases the duty cycle of the output current but not decreases the peak value while no body passes by so as to ensure LED luminous power and prevent light from scattering over the ground.

The invention provides an online self-sharpening metallic bond and super-hard abrasive precision grinding pellet and a preparation method thereof and belongs to the technical field of precision grinding pellets. Raw materials of the precision grinding pellet comprise a super-hard abrasive and a metallic bond, wherein the super-hard abrasive is diamond micro-powder; the diamond concentration falls within a range of 75-100 %; and the metallic bond uses a multicomponent alloy bond whose main components are copper powder, tin powder, aluminum powder, copper-clad ball shaped graphite powder, silicon dioxide and ferroferric oxide powder. The preparation method comprises the following steps: uniformly mixing and stirring the diamond micro-powder as well as the copper powder, the tin powder and the aluminum powder; adding polyvinyl alcohol to a mixture and mixing the polyvinyl alcohol and the mixture; adding the silicon dioxide, the copper-clad ball shaped graphite powder and the ferroferric oxide powder to an obtained mixture and mixing these materials and the obtained mixture; filling the mixture into a graphite mold; maintaining the pressure of the graphite mold for 5-10 minutes after pressurizing the graphite mold to 100-250 MPa; and carrying out hot pressing sintering on the graphite mold in a sintering furnace, wherein the sintering atmosphere is ammonia decomposition gas. Through the adoption of the online self-sharpening metallic bond and super-hard abrasive precision grinding pellet provided by the invention, online automatic sharpening can be achieved without blockage and offline repairing.

The invention discloses a manufacture technology for a hatch coaming and a hatch cover. The manufacture technology mainly comprises steps of the positioning of the hatch coaming, the surplus cutting, welding, then the assembly of the hydraulic equipment, pipelines and the electrical equipment, and then the hoisting of the hatch cover, the installation and the final debugging; the hatch coaming and the hatch cover adopt the following steps that firstly the actual main deck line type of the position of a dock where the hatch cover is positioned is copied onto a platform, and then positioning, the accurate detecting and welding are carried out according to the shape and the height of the hatch coaming on the platform; then the hydraulic equipment, the pipelines and the electrical equipment are assembled, after that, the hatch cover is hoisted; and finally the whole manufactured hatch coaming and the hatch cover are hoisted in a hatch position for one time and to be fixedly connected with a boat. Through the technology, the hoisting frequency of a gantry crane is reduced during the hoisting process, the hoisting time is reduced, and the hoisting efficiency is improved; the construction on the platform enlarges the usable operating region, and simultaneously the construction is more convenient and securer.

The invention discloses a control method for a periodic variable-thickness strip rolling speed, and belongs to the technical field of rolling. The control method comprises horizontal rolling speed control and the vertical rolling speed control of a roller, wherein the horizontal rolling speed control is performed in a way that: a thick region of a strip is rolled at a thick region rolling speed; the rolling speed starts to decrease at a near point A of a transition region and decreases to VB at a starting point B of the transition region; at the transition region, the horizontal rolling speed at the transition region is calculated according to a transition region curvilinear equation and a second flow equivalence principle; and the rolling speed starts to increase after an end point C of the transition region and increases to a thin region rolling speed at a far point D of the transition point to start to roll a thin region; the vertical rolling speed control of the roller is performed in the way that: the vertical rolling speed of the roller is 0 when the thick region of the strip is rolled; after the thick region is rolled and a rolled piece reaches the starting point B of the transition region, the roller starts downward pressing, and the vertical rolling speed of the transition region is Vdy(x); the Vdy(x) starts to decrease after reaching a maximum point Q1 and decreases to 0 at the end point C of the transition region; and the steps are repeated periodically.

The invention discloses a clamp structure for clamping and autocompensation; a clamping block (3) is arranged on a clamp; the surface of the clamping block (3) for clamping a workpiece is a clamping surface (4); and the clamping block (3) is made of an elastic material. With the technical proposal adopted, abrasion occurring in a clamping part and the change of the surface of the clamped workpiece are subjected to compensation by a simple elastic structure so as to ensure that a gripping jaw has enough clamping force in clamping and to guarantee the dimension of the workpiece after various machining processes (such as welding).

The invention relates to an assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers. The assembly welding tool device comprises a supporting base plate, a ball screw, grouped rolling bearings, a movement air cylinder, external locating blocks, internal locating blocks, a manual rocker and a graduated scale, wherein the ball screw and an executive component drive most of the external locating blocks and most of the internal locating blocks to move along guide rails of the supporting base plate so as to carry out integrated locating clamping fixation on the curved surface end sockets. According to the assembly welding tool device and method commonly used for the large curved surface end sockets of the pressure containers, in the manufacturing process of the pressure containers, tool locating of the large end sockets can be achieved, welding deformation is prevented, the curved surface end sockets are placed on the assembly welding tool device to be clamped in an assembly locating mode, spot fixation is carried out on weld joints, and then welding operation is carried out on the internal weld joints and the external weld joints; after welding is accomplished, the curved surface end sockets are naturally cooled to have the normal temperature, postwelding is carried out on the curved surface end sockets, stress relieving is carried out on the curved surface end sockets, labor intensity of workers is reduced, the production and manufacturing cycle of products is shortened, and the production cost is reduced.

The invention discloses an integral core and a mold for casting a coupler knuckle and a coupler knuckle casting method. The disclosed integral core for casting the coupler knuckle is provided with an S surface which is the same as a matching surface of the coupler knuckle, and can be placed into a mold cavity of a coupler knuckle casting mold during the casting, the S surface of the integral core is taken as an S surface of the mold cavity of the casting mold, and the S surface of the integral core for casting the coupler knuckle is a whole, has no parting surfaces, and also has no stripping taper, thereby ensuring that the S surface of a coupler knuckle casting piece has no stripping taper and burrs; the disclosed mold for casting the coupler knuckle is matched with the integral core for casting the coupler knuckle and can cast the coupler knuckle casting piece with the S surface without stripping taper; and the disclosed S surface part of the coupler knuckle comprises two joined cylindrical curve surfaces and has no stripping taper, so as to ensure that the matching surface of the coupler knuckle has evener contact and improves the service performance of the coupler knuckle.

The invention relates to a one-piece forming die with multiple functions, in particular to one-piece forming cup die for use in fields of blanking, stretching, raising, lettering, flanging and the like. In the technical scheme, the one-piece forming die with multiple functions comprises an upper die plate and a lower die plate, wherein a guide sleeve is fixed to the edge part of the upper die plate; a stretching male die is fixedly arranged on the middle part of the lower surface of the upper die plate; a punching block is arranged inside the bottom end part of the stretching male die; a flanging female die insert is sleeved outside the stretching male die; a blanking flanging female and male die is sleeved outside the flanging female die insert; an upper fixed plate is sleeved outside the blanking flanging female and male die; a punching rod is arranged in the stretching male die and the upper die plate in a sliding mode; and the bottom end part of the punching rod is connected with the punching block. By the one-piece forming die, products can be formed in one piece, so that the yield and quality of the products can be improved.

The invention discloses a manufacturing method of an X65 pipeline steel longitudinal submerged arc welded pipe for undersea use. The manufacturing process of the steel pipe comprises: edge milling, edge prebending, JCO moulding, prewelding, inside welding, outside welding, first ultrasonic inspection, first x-ray inspection, mechanical expanding, hydrostatic test, chamfering, groove machining, second ultrasonic inspection, second x-ray inspection, pipe end magnetic particle inspection and appearance quality inspection. The method of the invention makes each part of the X65 steel grade ongitudinal submerged arc welded pipe with a diameter of phi 762mm and wall thickness of 28.6-30.2mm has uniform deformation and performances in the process of JCO moulding; the method in the invention solves the problem that local heating of the steel pipe during welding results in severely reduced strength and toughness as well as elongation; the method provided in the invention also provides a solution to the problems of increased strength and reduced toughness and uniform elongation caused by work hardening during steel pipe mechanical expanding.

The invention discloses a manufacturing method for X90 pipeline steel longitudinal submerged arc welding pipe, the mass percent of the X90 pipeline steel consisting of: C 0.04-0.08%, Mn1.60-2.0%, Si 0.15-0.45%, S<=0.006%, P<=0.010%, Ni 0.20-0.50%, Mo 0.10-0.30%, Ti 0.010-0.020%, Al 0.015-0.050%, Nb 0.05-0.10%, V<= 0.05%, N <= 0.01%, Cu 0.10-0.30%, Cr <= 0.35%, B <= 0.004%, the rest is Fe, wherein Ceq <= 0.50, Pcm<= 0.25; the inside welding and outside welding adopt 4-wire submerged arc automatic welding. The welding pipe of the invention has advantages of tenacious welding joints and uniform performance.

The invention discloses a multi-specification combined elbow welding tool, which comprises a base and an upper seat, wherein the base is connected with the upper seat in a rotating way; a screw rod is arranged on the base, and is also connected with a positioning flange on the base through a connecting nut; the structure of the upper seat is the same as that of the base; a positioning seat is also arranged on the base; a positioning shifting fork is connected to the positioning seat through a pin shaft; a locking mechanism is arranged on the positioning shifting fork and the base; an angle adjustment mechanism is also arranged between the base and the upper seat. According to the multi-specification combined elbow welding tool, the size and the angle of a finished product elbow is directly determined through the tool, and flanges and elbow pieces are placed on the tool for integral assembly-welding, so that the angle and the size of the elbow can be ensured, and the finished product elbow can be ensured to be qualified.

The thread machining cutter with unique groove form includes upper surface, lower surface and three side surfaces constituting cutter body and cutting bit angle. Any two side surfaces are connected by arced surface to constitute cutting bit angle, the top is the front edge surface connected to the cutter body via an arced surface, the front cutter surface and the side surface form cutting edge, and each of the cutting edge is provided with one trimming edge. The front cutting surface has one fanned notch with wavy side walls and one boss with front end extending to inside the notch and tail end extending backwards and ending in the arced surface. The present invention can control the cutting scrap direction and shape during machining, raise the smoothness of the machined surface and the machining efficiency, and may be used in triangular, rectangular, trapeziform and other shaped thread.

The invention discloses a method for optimizing gasoline blending in an offline manner. The method includes building a gasoline blending model; optimally computing the built model by the aid of a particle swarm optimization algorithm. The minimum blending cost, the minimum product mass surplus and the minimum manganese-additive dosage are comprehensively taken into consideration in the model on the premise that requirements of product index constraints, component inventory constraints, manganese-additive dosage limit and material balance constraints are met. The method has the advantages that equality constraints in the blending model are processed by the aid of the particle swarm optimization algorithm in a novel processing mode, so that a result obtained after particle swarms are updated at every turn can assuredly meet conditions of the equality constraints, the scale of population can be guaranteed, and the arithmetic speed can be increased.

The invention relates to a multicomponent micro droplet microfluidic chip and a processing method thereof. The provided multicomponent micro droplet microfluidic chip is formed by a covering layer (A), a hydrophobic chip layer (B), a hydrophilic layer chip layer (C) and a base layer (D) which are stacked sequentially. The invention further provides a processing method of the multicomponent micro droplet microfluidic chip.

The invention discloses a method for collecting fins and arranging and combining the fins and flat pipes, which comprises the following steps of: (1) finishing equidistant arrangement of the flat pipes by using a pipe-arranging mold; (2) covering a large tray on the arranged flat pipes, turning, and putting the flat pipes into a fin and flat pipe collecting device assembly; (3) pushing a movable block to make the large tray support the flat pipes so as to clamp front ends of the flat pipes in a clamping groove of a guide block, and taking the pipe-arranging mold out; (4) automatically guiding the fins into a guide groove which is composed of the guide block and the flat pipes, and finishing the fin collection and arrangement of the flat pipes; and (5) loosening the movable block, collecting the arranged fins and flat pipes in a small tray or directly assembling the fins and the flat pipes, or stacking and storing the fins and the flat pipes. The invention also provides a corresponding device according to the method, which mainly comprises a pipe-arranging mold, a fin and flat pipe collecting device assembly and a small tray. The method for collecting the fins and arranging and combining the fins and the flat pipes has the advantages of no need of manually collecting the fins, reduction of a transfer program, capacity of preventing adhesion between the fins, automatically arranging the fins and the flat pipes, improving the product quality, along with low equipment investment and contribution to lean production.

The invention relates to a method for identifying and positioning a flexible printed circuit (FPC) board plug. The method comprises the following steps of: 1, calibrating at least four virtual identifier characteristic points on an image of the edge of an FPC board on a corresponding computer aided manufacturing (CAM) figure file and importing laser processing software to set the virtual identifier characteristic points as machine tool coordinate points; 2, flatly placing the FPC board with slightly large expansion ratio after manual detection on a platform and fixing the FPC board; 3, calibrating the camera resolution ratio of a positioning system by using a high-precision dimension standard sheet, wherein the resolution ratio remains unchanged when the height from a camera imaging plane to a platform plane is not changed; 4, aligning the camera with each identifier point of the FPC board real object obtained in the step 1 and capturing and calculating the actual coordinate point, corresponding to the platform, of each identifier point; 5, performing projective transformation on an FPC board coordinate system and a machine tool coordinate system, identifying and positioning the FPC board plug, and performing malformation correction compensation; and 6, adjusting laser cutting parameters acquired from cutting system software to be optimum and performing laser cutting processing on the FPC board and the plug appearance. The method is simple and convenient in operation and high in precision.