2195results about How to "Avoid quality problems" patented technology

The invention relates to a detection device used in a fused deposition type three-dimensional printer. The detection device comprises a mounting seat and a first detection unit, wherein the first detection unit comprises a first detection wheel, a spring, a first photoelectric sensor as well as a positioning roller and an extrusion roller rotatably mounted on the mounting seat; an axis of the extrusion roller is parallel to that of the positioning roller, and the distance between the axes is adjustable; restoring force of the spring enables the distance between the axis of the extrusion roller and the axis of the positioning roller to be reduced; a channel for wire forming is formed between a working surface of the extrusion roller and a working surface of the positioning roller wheel; the first detection wheel is coaxially connected with the extrusion roller or the positioning roller in an equal-angular-speed manner; the first detection wheel comprises a base part and a covering part circumferentially arranged along the base part; a light path of the first photoelectric sensor penetrates through a plane formed by rotating the covering part around an axis of the first detection wheel. The detection device can be used for detecting whether the three-dimensional printer has the problems of empty printing and the like or not. In addition, the invention further provides the three-dimensional printer employing the detection device and a printing method of the printer.

It relates to a heat-generating composition having such dispersion stability that withstands continuous molding, and has excellent drainage property, excellent heat-generating characteristics, excellent molding property and excellent shape retaining property, without becoming viscous, and relates to a heat-generating body using the same and a process for producing the heat-generating body. It contains, as essential components, a heat-generating substance generating heat upon reaction with oxygen, a carbon component, an oxidation promoter and water, characterized in that the composition further contains a water separation-preventing stabilizer in a proportion of from 0.001 to 0.25 part by mass per 100 parts by mass of the heat-generating composition, and has a water mobility value of from 7 to 40 and a separation degree of from 0 to 30.

The invention discloses a method for manufacturing a surfacing composite wear-resistant steel plate, which comprises the following steps of: tiling a steel base plate on a water-cooled platform, and compacting the steel base plate by employing front and rear side compaction devices respectively; after a weld pass is welded, opening the front and rear side compaction devices, and conveying the steel base plate for a certain distance forward through a pinch roll device; and repeating the steps for surfacing, until a flat surfacing composite wear-resistant steel plate with a high-chromium alloy wear-resistant layer is obtained on the whole steel base plate. A piece of equipment for manufacturing the surfacing composite wear-resistant steel plate applied to the method for manufacturing the surfacing composite wear-resistant steel plate comprises a portal frame, a welding device, a rear side compaction device, a front side compaction device, a water-cooled platform, a pinch roll device and a frame, wherein the rear side compaction device is arranged on the rear side of the welding device; and the front side compaction device is arranged on the front side of a welding gun of the welding device. The composite wear-resistant steel plate welded through the manufacturing method is small in deformation and high in welding quality and is not limited to specifications.

The invention belongs to a numerical control processing machine tool, comprising a fixed platform, a movable platform, a space parallel connection closed chain mechanism formed by the central leg and the surrounding leg of a redundancy drive device which are arranged between the two platforms and are all provided with a transmission system, a locking device arranged between the hinged saddle of the central leg and the movable platform, a gear rack transmission mechanism arranged between the redundancy drive device and the central leg and between the redundancy drive device and the surrounding leg, a working platform which can move along X direction and Y direction, and a control system. The reconstruction and fault tolerance correcting method in the operation of the machine tool is as follows: when one transmission system in any drive device goes wrong, a redundancy transmission system automatically converts; when two transmission systems in any drive device go wrong, a corresponding leg thereof is converted into a driven leg, thus leading the parallel connection closed chain mechanism to be changed from four freedom degrees into three freedom degrees so as to maintain the normal operation of the machine tool, thereby being capable of effectively improving the efficiency, safety and reliability of the hybrid machine tool, and avoiding the quality or safety accidents caused by sudden failures in the operation of the machine tool.

The invention discloses a lignosulfonate-polycarboxylic acid copolymerized composite high-performance water reducer and a preparation method thereof. The high-performance water reducer comprises the components in parts by weight: 5-30 parts of lignosulfonate, 20-30 parts of methyl allyl polyethenoxy ether, 2-5 parts of acrylic acid, 1-5 parts of ammonium persulfate, 4-15 parts of sodium hydroxide and water. The preparation method comprise the steps as follows: lignosulfonate, methyl allyl polyethenoxy ether and acrylic acid are directly synthesized under the action of ammonium persulfate, and the mixture is neutralized by sodium hydroxide to obtain the high-performance water reducer. As the high-performance water reducer is made from natural recycled materials, the high-performance water reducer is low in price, stable in performance, high in water-reducing rate, good in collapse prevention property, remarkable in improved effect, and is unlikely to bleed, separate and deposit after concrete is added, the quality problems of sand leakage, honeycomb-like phenomenon and leakage due to cracking in the middle and low-strength concretes are effectively avoided, and the safety performance is improved.

The invention relates to a solar battery cuprum-indium-gallium-selenium film key target material and a preparation method thereof. The target material uses cuprum-indium-gallium-selenium element powders as raw material; CIGS powder is prepared by adopting solid phase synthesis and further isostatic compaction; finally a CIGS target material is prepared by high temperature sintering. The target material is used as raw material and a CIGS film can be achieved by further sputtering. In the invention, the four-element component key target material preparation technology is simplified from 'fractional deposition---selenizing optimization'to'one-step deposition', thereby solving the complex technological process of multiple target replacements and repeated depositions and the quality problem caused by late-stage selenylation; the adjustment of the components is carried out by the target material; the late-stage sputtering technology only needs to ensure the quality of film forming, thereby increasing the controllability of the technology.

The invention discloses a method for detecting a designated location point of variation. The method comprises the following steps that a designated location point of variation and a reference sequence containing the variation are determined based on known information of the variation; sequencing data of nucleic acid of a sample to be detected is obtained, wherein the sequencing data comprises multiple read segments; the read segment containing the designated location point in the sequencing data is extracted, and then the designated read segment is obtained; N bps are extended in the directions of both ends centered on the designated location point of the designated read segment, a designated fragment is obtained, 4<=N<=10; the designated fragment is compared with the reference sequence containing the variation, and then a support read segment is obtained, wherein the support read segment is a read segment where the designated fragment matched with the reference sequence containing the variation is located; the amount of the support read segment is counted, and whether or not the variation exists is judged based on the amount of the support read segment. Attention is paid to whether or not sequence characteristics which should occur after the variation exist in the read segment, and based on the judgment, detection of the designated location point of the variation is carried out; the problem of the decline in the quality of the comparison near the variation location point is avoided, and the variation can be detected quickly and accurately.

The invention belongs to the technical field of fertilizer-saving high-yield culture in agricultural production and relates to a method for increasing yield of double cropping rice by turnover and fertilizer saving of Astragalus sinicus L. and straw in a rice field. Specifically, the method includes that during growth of early rice, green Astragalus sinicus L. is overturned and pressed to return to the field so as to replace part of nitrogenous fertilizer, and during growth of late rice, straw of the early rice is returned to the field to replace part of nitrogenous fertilizer, and purposes for nitrogenous fertilizer conservation and high yield are achieved in the integral production cycle of double cropping rice. The method solves the problems that areas of vacant fields in winter are enlarged, the rice field is deteriorated, ecological cost for rice production is increased, and fertilizer utilization rate is seen low and the like in a rice cropping system of southern China. The method is a cultivating technology high in yield, nitrogenous fertilizer saving and lower in N2O emission and provided for increasing yield of the double cropping rice, reducing fertilizer investment and increasing fertilizer utilization rate.

A method for forming a fin type field effect transistor comprises the steps of providing a semiconductor substrate which comprises a first region and a second region, wherein a first fin part is formed on the first region and a second fin part is formed on the second region, and an insulating layer is formed on the semiconductor substrate; forming a barrier layer on the second fin part; forming a first pseudo gate structure on the first region; forming a second pseudo gate structure on the second region, wherein the second pseudo gate structure is arranged on the surface of the barrier layer and bestrides the second fin part; forming a dielectric layer which is level with the first pseudo gate structure and the second pseudo gate structure on the semiconductor substrate; eliminating the first pseudo gate structure for forming a first groove which is exposed from the surface of the first fin part, and eliminating the second pseudo gate structure for forming a second groove which is exposed from the barrier layer on the second fin part; and forming a first gate structure in the first groove, and forming a second gate structure in the second groove. The method of the invention can be used for accurately adjusting the gate dielectric layer thickness of the fin type field effect transistor which is formed on different regions.

The present invention discloses an interactive presentation method and system of GIS and BIM augmented reality in tubelane and subway construction. The method comprises: a GIS combines an elevation digital model with a BIM to generate a three-dimensional model, and establishes a terrain three-dimensional model on the elevation digital model, and establishes a tubelane-subway three-dimensional model on the BIM and stores the model into a database server; an imaging apparatus acquires a feature range on media, an AR client calls a terrain three-dimensional model and a tubelane-subway three-dimensional model with corresponding numbers according to the feature range to generate an overall three-dimensional model, and outputs the overall three-dimensional model into the corresponding feature range in a display device for overlapped display; and a sometosensory device acquires a corresponding gesture action of an operator, the AR client calls a terrain three-dimensional model and a tubelane-subway three-dimensional model with corresponding numbers according to the gesture action and outputs the terrain three-dimensional model and the tubelane-subway three-dimensional model into the corresponding feature range in the display device for overlapped display. The method and system disclosed by the present invention realize automatic identification and query of AR, and greatly improve working efficiency and quality.

The invention discloses a structural auto-archiving method for unmanned aerial vehicle inspection images of a power transmission line. Geographic longitude and latitude coordinates collected by an unmanned aerial vehicle positioning chip when photographing is carried out are added to blocks of an image file EXIF collected by inspecting the power transmission line through an unmanned aerial vehicle; geographic position coordinate information stored in the image file collected by inspecting the power transmission line through the unmanned aerial vehicle is analyzed; the geographic position coordinate information is compared and analyzed with geographic coordinate information of power transmission towers in a production standing book; auto-archiving of the unmanned aerial vehicle inspection images taking towers and line sections as objects is realized; and the firm foundation is laid for further analysis and application of inspection image data.

The invention provides a quick topographic map making method based on database driving. Topographic maps of corresponding plotting scales are quickly made by a built topographic database, and a map making database and the topographic database are subjected to integrated storage, integrated management and synchronous updating. The quick topographic map making method based on database driving comprises the following steps of: (1) preprocessing map making data at a management end, namely building the topographic database, expanding the map making function of the topographic database, deriving map making data, generating framing map making sub databases, and establishing framing map making engineering; (2) generating the map making data at a production end, namely optimizing and adjusting the map making data, editing map making, trimming the contour of a map, edging the data and outputting the map; and (3) putting the topographic map making data into the database at the management end, namely concentratively performing uniform data storage processing on the topographic map making data subjected to the map making production steps such as map making editing, inspection and accepting, and forming the final topography and map-making integrated database.

The invention provides a device for automatically transferring products to a rack. The device comprises an automatic lifting mechanism and an automatic rack inserting mechanism and further comprises a first mechanical arm arranged on the automatic lifting mechanism, trays arranged in the automatic lifting mechanism in a stacked mode, a conveying positioning mechanism, a second mechanical arm and the rack, wherein the conveying positioning mechanism, the second mechanical arm and the rack are arranged on the automatic rack inserting mechanism independently. The device further comprises a work drive mechanism electrically connected with the automatic lifting mechanism, the automatic rack inserting mechanism, the first mechanical arm, the conveying positioning mechanism and the second mechanical arm. Under the drive of the work drive mechanism, the automatic lifting mechanism jacks the trays carrying the products to a first designated position, the first mechanical arm transfers the products on the trays to the front end of the conveying positioning mechanism at the position, then the products are conveyed to the rear end of the conveying positioning mechanism through the conveying positioning mechanism, finally, the second mechanical arm inserts the products into the rack. By means of the device, automatic transfer of the products between the corresponding tray and the rack in different directions can be achieved, and the functions of improving production efficiency and lowering the manual operation risk are achieved.

The invention discloses a tin-zinc series lead-free alloy soldering paste and a manufacturing method thereof. According to the weight percentage, the tin-zinc series lead-free alloy soldering paste consists of 85 to 90 percent of solder alloy powder as well as 10 to 15 percent of scaling powder; wherein, the solder alloy powder consists of 8 to10 percent of zinc, 0.005 to 1.0 percent of rare earth element, 0.001 to 0.1 percent of aluminum as well as tin according to the weight percentage; the total amount of each component is 100 percent; wherein, the scaling powder consists of 15 to 60 percent of modified rosin, 3 to 20 percent of activator, 1 to 10 percent of paste forming agents, 2 to 10 percent of thixotropic agents, 0.1 to 3 percent of azimino-benzene, 0.1 to 8 percent of trichloride isocyanuric acid as well as organic solvent according to the weight percentage; the total amount of each component is 100 percent. The solder alloy powder and the scaling powder are respectively prepared and then mixed uniformly for preparing the tin-zinc series lead-free soldering paste. The lead-free soldering paste has excellent wettability, is hard to be oxidized, has good welding performance and is suitable for an SMT technique flow.

The invention relates to a method for preparing polymer polyol with high solid content and low viscosity. The method adopts an intermittent method or a continuous method, and uses a basic polyether polyol as a continuous phase to perform in situ polymerization on a vinyl monomer, polyether polyol, a dispersing agent, and a chain transfer agent under the action of a free radical initiator to produce the polymer polyol with high solid content and low viscosity; or the method uses a certain amount of the polymer polyol with target solid content as a substrate material, mixes the raw materials such as the basic polyether polyol, the free radical initiator, the vinyl monomer, the dispersing agent, and the chain transfer agent evenly according to certain mixture ratio, and adds the mixture to the substrate material continuously to be polymerized so as to obtain the polymer polyol with high solid content and low viscosity. The polymer polyol produced by the method has the advantages of low viscosity, stable dispersion of solid particles, small average particle size of the solid particles, and even particle size. The polymer polyol improves the physical mechanical properties of products applying the polymer polyol, and has wide application range.

The invention provides a wafer thinning method, which is characterized in that selective corrosive liquid is utilized for etching an crystal edge oxidization layer of a device wafer, wherein the etching rate of the selective corrosive liquid on the oxidization layer is larger than the etching rate on the device wafer, so that the height difference of the device wafer and a crystal edge oxidization layer surface of the device wafer by respectively utilizing SPINETCH-D (mixed solution of phosphoric, nitric acid, sulfuric acid and hydrofluoric acid) and HNA (mixed solution of hydrofluoric acid, nitric acid and acetic acid) to perform two etching process on the back surface of the device wafer and the crystal edge oxidization layer of the device wafer can be overcome. Meanwhile, by utilizing the chemical process, the problem by utilizing the physical process (i.e. cutting process) that the utilization rate of the produced device wafer is low and the quality and the reliability of the device wafer are low can be avoided, and the quality of a finally formed image sensor can be improved.

The invention provides an adjustable leveling guide rail. The adjustable leveling guide rail comprises a guide rail beam and a plurality of supporting pieces, wherein each supporting piece comprises a screw rod and a nut; the screw rod is connected with the guide rail beam through the nut; the end part of the screw rod is provided with a fixing block which is hexagonal, tetragonal or triangular; the fixing block is connected with the screw rod in an integral molding mode or the fixing block is detachably connected with the screw rod; and the supporting piece also comprises a positioning piece connected with the screw rod in a fitting mode. The invention also provides a leveling method for realizing the leveling guide rail, namely, the levelness of the leveling guide rail is adjusted by rotating a leveling nut and a positioning nut. In a construction process, instant leveling is realized by clamping the fixing block, fixing the screw rod and adjusting the levelness of the guide rail by screwing the positioning nut and the adjusting nut respectively. The adjustable leveling guide rail has high leveling accuracy, can realize instant leveling in the construction process and has the advantages of low cost, convenient detachment, easy construction, clean environment, green construction and the like.

The invention discloses a braided wire take-up mechanism, pertaining to the field of mechanical technology of electric wires and cables process. The braided wire take-up mechanism of the invention comprises a tension adjusting device which is arranged above the side part of a braider, a winding device which is arranged below the side part of the braider and a reciprocating guiding device which is arranged at the side part of the braider. The braided wire take-up mechanism is characterized by also comprising a braided wire defect acquisition device which comprises an acquirer, a signal acquisition device and a pulling rope. The acquirer is correspondingly arranged on a channel of the braided wire while the sign acquisition device is fixed on the tension adjusting device or on the braider. Furthermore, lines and an electric controller of the braider are electrically connected and the pulling rope is connected on the acquirer and the sign acquisition device. The braided wire take-up mechanism of the invention has the advantage of avoiding the quality problem of the braided wire acquired on the winding device.

An automatic conveying device for helium leak check of air-conditioning heat exchanger cores and a using method belong to the technical field of manufacturing equipment of air-conditioning heat exchanger cores. The automatic conveying device for helium leak check of the air-conditioning heat exchanger cores comprises a transitional conveying line body, a feeding robot and gripping apparatus, a helium detection logistics circulating line body, a helium detection box, a vision imaging device, a discharging robot and gripping apparatus, and the like, wherein the helium detection logistics circulating line body is located in the central position of the automatic conveying device; the inlet of the helium detection box is connected with one section of the helium detection logistics circulating line body; a plurality of outlets of the helium detection box are connected with the other section of the helium detection logistics circulating line body, which is parallel to the helium detection box. According to the automatic conveying device, the air-conditioning heat exchanger cores are conveyed by the vision imaging device, and the robot and gripping apparatuses instead of manual work under the condition of not changing the original technological process of production, a specific operation method is adopted to achieve the purposes of improving the equipment production efficiency, reducing the labor intensity and ensuring the product quality, and the effect is remarkable.