46 results about "Defect free" patented technology

The invention discloses a high-performance Cu-Co-Si alloy plate and a preparation method thereof, and belongs to the technical field of copper alloy materials. The alloy plate comprises the following components in percentage by weight: 1.0-2.5% of Co, 0.2-1.0% of Si, 0.09-0.2% of Cr, 0.01-0.1% of Ni, less than or equal to 0.2% of Ti, less than or equal to 0.5% of Fe, less than or equal to 0.5% of Sn, less than or equal to 0.5% of Zn, less than or equal to 0.5% of P and the balance of Cu and inevitable trace impurities. The preparation method comprises the steps of smelting, semi-continuous casting, hot rolling, cold rolling, cleaning, stress relief annealing, solid solution, final cold rolling, aging and the like. According to the invention, alloy elements are reasonably matched and a preparation process is optimized, so that the alloy plate forms a nanoscale dispersed precipitated phase, dislocation motion is effectively hindered, grains are refined, and synergistic improvement of strength, conductivity and processability is realized. The thickness of the finished board is (0.02-0.15) + / -0.003 mm, the hardness is 180-220 HV, the electric conductivity is 62-66% IACS, the tensile strength is 620-680 MPa, 90-degree bending R / t is 0.5, and the finished board is free of surface defects and can be widely applied to the electronic and electrical field with high reliability and high performance.

A method for preparing a graphene composite membrane on the surface of a tubular support. In the method, a tubular ceramic membrane is used as the support, a layer of graphene material is uniformly prepared on the surface of the support by vacuum suction, and the defect-free tubular graphene composite membrane is obtained by the drying process.

The application discloses a kind of storage tank three-in-one structure defectless connection method, belong to welding technical field.The method is first to the double-pass welding test of simulation piece, obtains the welding parameter satisfying design requirement;Again according to the three-in-one structure of the product to be welded double-pass sectional welding is carried out according to welding parameter, forms defectless weld.The application adopts close-range double-pass weld process, by reasonable sectional control welding length, ensure that the temperature of half membrane is lower than the requirement of design document, under the premise of realizing the high-quality welding of product, the welding temperature of product is strictly controlled.The first welding qualification rate of product is improved from 30% to more than 95%.

The invention belongs to the technical field of bearing bush production and machining, and particularly relates to a bearing bush punch forming device which comprises a guide hole penetrating through a die holder in the first direction, and a punch capable of being switched between two stations is arranged in the guide hole, so that the punching process is divided into two stages. An external corner formed by the first working face and the second working face firstly applies pressure to the middle of the end face of the bearing bush, materials are forced to flow outwards preferentially, and the curling defect caused by edge material concentration is avoided; and in the state of the station II, the first working surface is switched to be parallel to the end surface and uniformly presses the area limited by the guide hole, so that the material which directionally flows in the early stage is regularly compacted in the closed cavity, and finally, a compact and defect-free positioning lip is formed. The problems of cracks and air gaps caused by lack of support at the edge and unsmooth material flow in the prior art are fundamentally solved, and the forming quality and the product yield of the positioning lip are remarkably improved.

The invention provides a method for manufacturing a glass plate and a method for manufacturing a product glass plate, which can reliably suppress deterioration of quality of an electronic device due to a product glass plate cut from the glass plate. The method for manufacturing a glass sheet comprises: a detection step (S3) for detecting defects included in each continuously obtained glass sheet and recording defect information of the defects; and a determination step (S4) for determining, on the basis of the defect information, a cut-out pattern of a product glass plate that can be cut out from the raw glass plate. The determination step (S4) includes: a frequent occurrence determination step (S9) for determining, on the basis of the defect information, whether or not there is a frequent occurrence region in which defects occur frequently in the plurality of glass raw sheets; and an exclusion region setting step (S10) for setting a region including the frequent occurrence region as an exclusion region in which the product glass plate cannot be cut when the frequent occurrence region is generated. In a determination step (S4), the cut-out pattern excluding the region not included in the product glass plate is determined.

The invention relates to a 42CrMo coal machine hydraulic prop surface defect repairing method based on laser cladding, which adopts iron-based self-fluxing laser cladding alloy powder with specific components as repairing alloy powder, and forms a repairing layer on a defect part through laser scanning cladding. The alloy powder comprises, by mass, 15%-20% of Cr, 0.3%-0.6% of Mn, 2%-4% of Ni, 0.5%-1% of Si, 0.4%-1% of B, 2.5%-5% of Mo and the balance Fe and inevitable impurities. Through collaborative optimization of alloy powder component design and a laser process, high-strength metallurgical bonding of a repairing layer and a matrix is achieved, the repairing layer is compact in structure and free of defects, the abrasion resistance and corrosion resistance of the coal machine hydraulic prop are remarkably improved, and the service life of the coal machine hydraulic prop is remarkably prolonged.

The invention belongs to the technical field of laser cladding remanufacturing, and relates to a method for repairing broken tooth damage of a gear. According to the method, firstly, a machining method is adopted, after all areas of broken teeth to be repaired are removed, the broken teeth are continuously cut inwards, and a groove which is provided with a flat and defect-free bottom face and is parallel to the axis of a gear is obtained in a tooth root circle; after gear parameters are collected, a gear base body is preheated, the bottom face serves as a base face, technological parameters are determined, a scanning mode is selected for basic tooth profile cladding, cladding continues after a groove is filled, an approximately-trapezoidal basic tooth profile is obtained, and cladding allowance is reserved on the tooth side face; the relative position posture that a laser head is vertical and the tooth side face is inclined is adopted, gradient composite powder is adopted for tooth side face cladding material increase, a gradient cladding layer is obtained, the cladding allowance reserved for basic tooth profile cladding is supplemented, and the machining allowance of the tooth face is removed; and finish machining and heat treatment are conducted on the repairing layer, the precision and performance of the repaired gear are improved, and the performance of the repaired gear is inspected.

This invention provides a method, apparatus, and virtually defect-free thick-walled rings that can be manufactured from multi-component glass to produce near-net geometry rings, even in the case of thick-walled rings with wall thicknesses exceeding 10 mm. [Solution] First, a ring-shaped blank is manufactured from multi-component glass using a casting process. In the casting process, a casting strand made of molten multi-component glass is fed into a casting mold with a ring-shaped casting cavity 1a extending around a central axis 1s. The casting strand, upon impact with the collision zone 5, branches into a right substream 7a and a left substream 7b. The substreams 7a and 7b converge in a confluence zone 6 within the casting cavity 1a, filling the casting cavity 1a to at least a portion of its height. After the molten glass cools, a ring-shaped blank is obtained, which is further processed into a glass ring made of multi-component glass.

This invention discloses a method for characterizing the cutting mode during the micro-milling repair process of KDP crystal surface defects. It relates to the field of optical component processing technology and addresses the problem that existing methods assume the workpiece material surface is defect-free, lacking a three-dimensional model of the cutting energy specificity for ball-end micro-milling that considers the presence of micro-defects. The method includes the following steps: Step 1, selecting repair process parameters and measuring the depth of crystal surface defects; Step 2, establishing a three-dimensional calculation model of the average cutting area of ​​ball-end micro-milling; Step 3, collecting the cutting force during the surface defect micro-milling repair process; Step 4, constructing a cutting energy specificity model for the ball-end micro-milling repair process; Step 5, analyzing the cutting mode during the micro-milling repair process based on the cutting energy specificity model. This invention provides a reference for improving surface quality, controlling size effects, and optimizing process parameters in actual repair processes, thereby further improving the surface quality of repaired KDP crystal components.

The invention relates to the technical field of alloy plating layers, in particular to a tungsten alloy plating layer and a preparation method thereof and a liner tube with holes, the tungsten alloy plating layer is a tungsten-nickel alloy plating layer, the plating layer is compact and free of defects, the thickness of the plating layer is 40-100 microns, and the Vickers hardness of the plating layer is not lower than 900 HV1. The preparation method comprises the following steps: forming a stable electroplating solution by using a special composite complexing agent, conductive salt, a buffer agent and an additive as auxiliary materials, and electroplating under matched pulse parameters and mechanical stirring through plasma cleaning in combination with a profiling anode and pulse electroplating technology. According to the method, the high-hardness tungsten alloy coating with uniform thickness and excellent performance can be deposited on a workpiece with a complex shape, particularly the inner wall and the outer wall of a liner tube with holes and the inner surfaces of all the holes, and the technical problem of uniformity of the coating on the surface of a deep hole and a complex structural part is solved.

The invention discloses a nut multi-defect identification and nutlet plumpness detection method and device, equipment and a storage medium, and belongs to the technical field of electronic equipment. According to the method, after X-ray computed tomography is carried out, whether the shell of the nut is intact or not is judged, meanwhile, the state of the kernel in the nut is recognized and judged, and therefore whether the nut belongs to healthy kernels or not is determined; according to the scheme, synchronous detection of the shells and the kernels is achieved through three-dimensional model reconstruction, the kernel quality is judged by depending on a single parameter in the traditional technology, a multi-dimensional parameter system containing geometric morphology, an internal structure and surface features is innovatively constructed, and healthy kernels, wizened kernels and insect-damaged kernels can be accurately distinguished.

The application provides a kind of quick detection method of wave-absorbing coating defect based on incident angle modulation, belongs to the field of defect detection, comprising: initializing detection system;Multi-angle incident sweep frequency test is carried out on the surface of defect-free coating;Set the incident mode to grazing incidence, sweep frequency test is carried out on the surface of defective coating, and whether there is surface defect is determined by comparison and analysis with reference data;Set the incident mode to normal incidence, sweep frequency test is carried out on the surface of defective coating, and whether there is circular defect is determined;When it is determined that circular defect exists, multi-angle sweep frequency inversion is executed to quantify defect size, and actual physical size is obtained by using elliptical correction model correction;An adaptive calibration module based on deep learning is introduced to obtain the final defect size.The application can meet the needs of stealth aircraft and other aerospace equipment.

The invention relates to a method for removing object parts from objects, in which material defects are locally induced (80) in an object material along object parts to be removed; the object parts are removed (88) from the objects by etching the objects in an etching medium which etches the object material containing the material defects more strongly than defect-free object material; the objects are arranged (82) in a holder (40) before the etching; the holder (40) is arranged (84) in a filter basket (10) before the etching; for the purpose of etching the objects, at least some of a carrier system (60) formed from the filter basket (10) with the holder (40) arranged therein is arranged (86) in the etching medium; at least a portion of the object parts removed from the objects are retained (90) in the filter basket. The invention further relates to a filter basket and a holder and to a carrier system for carrying out the method.

The invention relates to a method for repairing holes of an inorganic artificial stone slab. The method comprises the following steps: S1, hole pretreatment: removing dust and chippings in the holes, roughening the inner walls of the holes, cleaning and drying; s2, preparation of repairing slurry: mixing an inorganic filler, a cementing material, a polymer adhesive, a water reducing agent, toner and water to obtain the repairing slurry; s3, vacuum filling is conducted, specifically, repairing slurry is injected into the hole, and negative pressure is applied to the hole area to remove internal gas in the injection process and / or after injection; s4, curing and processing: curing and curing the filling slurry, and grinding and polishing the repaired area to obtain the repaired inorganic artificial stone plate. The method has the beneficial effects that bubbles are actively removed through the vacuum filling step, it is ensured that the repairing slurry can fully infiltrate the roughened base material surface, a compact and defect-free bonding layer is formed, and the method is particularly suitable for repairing tiny and irregular holes which are not easy to operate.

The invention discloses a silicon carbide epitaxial wafer mercury probe C-V test method based on defect pre-detection, and the method comprises the steps: firstly carrying out the cleaning treatment of a to-be-tested sample, then carrying out the specific region or global scanning recognition of defects through a defect detector, and excluding initial abnormal test points located in a defect region or closer to the defect region; then redefining a replacement point location in a defect-free area around the abnormal point location, and synchronizing the replacement point location to a mercury probe test system; and after the electrical parameter test is completed according to the replacement point location, repeating the process for the data deviating from the normal range until effective data is obtained. Defect pre-detection and test point location optimization are deeply combined, and a'defect-point location-efficiency-risk 'multi-angle cooperative control mechanism is established; the method does not need large-scale modification of existing hardware, can be integrated in an existing test system, greatly reduces the number of repeated tests, reduces the mercury leakage risk, prolongs the service life of related spare parts, improves the accuracy of test data, is suitable for industrial improvement, and has economic popularization.

The present application relates to the technical field of safety evaluation or nondestructive testing acceptance of welding structure containing defects, and provides a manufacturing defect acceptance method of high-temperature service welding component, which comprises the following steps: calibrating parameters of a creep constitutive model by testing the creep performance of a defect-free material / structure; performing regular processing on the defects, and constructing a finite element model of the structure containing defects by using a finite element tool; obtaining the creep life under different defects by controlling the defect variables, performing normalization processing on the creep life under different defect characteristics, and obtaining a mapping relationship between the defect characteristics and the creep life by regression analysis; determining the defect diameter acceptance limit value under a specific plate thickness, and passing the acceptance if the defect diameter is within the acceptance limit value. The acceptance limit value of the structure containing defects is determined by the weakening degree of the creep life, the safety operation of the structure during the service period is determined, theoretical support is provided for the nondestructive testing acceptance of nuclear power or chemical equipment containing defects, and the acceptance limit value of the structure containing defects is optimized.

The invention relates to the technical field of gas separation membrane materials, in particular to a defect-free polysulfone / MIL-160 / CAU-10-F composite membrane material and a preparation method and application thereof.Polysulfone serves as a support and is compounded with MIL-160 / CAU-10-F to form the defect-free polysulfone / MIL-160 / CAU-10-F composite membrane material or a composite membrane, and the defect-free polysulfone in the composite membrane material has the advantages that the defect-free polysulfone in the composite membrane material can be separated from the MIL-160 / CAU-10-F composite membrane material at a high temperature; good mechanical property and oxidation resistance can be maintained, and meanwhile, the gas flux is relatively high; meanwhile, a hydrogen bond network structure formed at the interface of polysulfone and MIL-160 / CAU-10-F can further enhance the intersolubility with the interface of MIL-160 / CAU-10-F, and the performance stability and the plasticizing resistance of the composite membrane material are further improved. The flawless polysulfone / MIL-160 / CAU-10-F composite membrane disclosed by the invention has excellent plasticizing resistance and durability.

The present application relates to a kind of methods for straightening curved continuous casting roller mandrel, comprising the following steps: disassembly, cleaning mandrel, and nondestructive testing is carried out to mandrel;With the mandrel of flaw detection qualified is clamped on laser numerical control processing machine tool, laser scanning and laser cladding are sequentially carried out to carry out rough straightening;After cooling, the coaxiality of bearing position after straightening is measured, if eccentricity is greater than or equal to 1mm, repeat rough straightening process, until eccentricity is less than 1mm;Wherein the mandrel of needing straightening bearing position in multiple places, laser scanning and laser cladding of bearing position in each place are completed using the above steps;When all bearing positions are completed straightening, turning is carried out by numerical control machine tool, and nondestructive testing is carried out to mandrel after processing, and flaw detection is defect-free mandrel is applied with rust-proof oil and is ready for use.The present application realizes the repair of curved continuous casting roller mandrel, prolongs the service life of mandrel, avoids the early scrapping of mandrel due to bending, and process is simple, low in cost, with remarkable economic benefits.

The application relates to a spinneret arrangement for the defect-free mounting of a spinneret unit, and to the use of the spinneret arrangement in the production of hollow fibre membranes.

The invention relates to the technical field of ultrasonic flaw detection, in particular to a microcrack defect standard test block and a manufacturing method thereof. The microcrack defect standard test block comprises a closed crack area and a defect-free area located around the closed crack area, the closed crack area is generated by a crack mixture, the defect-free area is generated by a first hard alloy material, the crack mixture is formed by mixing the first hard alloy material and a second hard alloy material, and the second hard alloy material is formed by mixing the first hard alloy material and the second hard alloy material. The first hard alloy material and the second hard alloy material are the same in component and different in oxygen content and water content. In the microcrack defect standard test block, the closed crack area is generated by the crack mixture obtained by adding the hard alloy material powder with higher oxygen and water content into the conventional hard alloy material powder, hard alloy materials with different compositions do not need to be added, and the quality of the crack-free area of the standard test block is not influenced.

The invention discloses a production method of a flexible circuit board, and the method comprises the steps: determining the bad board rate of each mother jointed board, screening out a target mother jointed board according to the bad board rate, and enabling the target mother jointed board to be the mother jointed board of which the bad board rate is in a preset range; performing a steel sheet reinforcement process on a defect-free unit plate in the target mother jointed board; performing board splitting on each target mother jointed board so as to screen out defect-free unit boards; and combining the plurality of defect-free unit boards to form a virtual jointed board, and feeding the virtual jointed board as a standard jointed board into an SMT production line for surface mounting processing so as to prepare the flexible circuit board. According to the method, the mother jointed boards with the too high reject ratio are accurately screened out by setting the preset range, and the defect-free unit boards in the mother jointed boards are independently treated and recombined, so that the overall production efficiency and the material utilization rate can be effectively improved.

The present invention provides a modification to the EBW process, which is referred to as a slope-out methodology, the results in the formation of a “slope-out portion” located generally in that region of the overall weldment located at the end of the ordinary EBW welding process for joining two components. The slope-out portion overlaps with the initial weld of the workpiece for a given distance or length along the weld and effectively eliminates the keyhole and provides a weldment that has minimal to no defects, particularly in the slope-out portion. The slope-out methodology begins by adjusting various parameters related to the electron beam to essentially decay the beam. In general, the focus position of the electron beam is moved from under-focused (focal position in the bulk of the material) to over-focused (focal position ahead of the workpiece surface) as the overlapping weld is made.

The invention discloses a method for judging the quality of a continuous casting billet. The method comprises the following steps: 1) dividing a judgment basis into a low-frequency data criterion and a high-frequency data criterion; 2) extracting features according to a low-frequency data criterion, judging whether defects occur or not through a target function of low-frequency data, and when the target function is 0 < = TLlt; when 0.5, judging that the continuous casting billet does not have defects; when the target function TL is greater than or equal to 0.5 and less than or equal to 1, preliminarily judging that defects possibly exist, and performing final judgment; 3) the final judgment extracts features according to a high-frequency data criterion, and judges whether defects occur or not through an objective function of low-frequency and high-frequency data; when the target function TH is greater than or equal to 0.5 and less than or equal to 1, finally judging that defects exist; if the target function is 0 < = THlt; and if so, finally determining that no defect exists. According to the method, the accurate and comprehensive threshold value of the judgment basis is given, and the quality of the continuous casting billet is judged on the basis of the threshold value, so that the defects in the prior art are overcome.

The application relates to the technical field of surface defect detection, and discloses a detection device and a detection method for surface tearing and crushing defects of honeycomb materials, the method comprising the following steps: extracting a morphological line diagram of a honeycomb material to be detected according to a to-be-detected image; splitting the morphological line diagram into a plurality of to-be-detected subgraphs with the same shape; extracting a to-be-detected feature vector of the to-be-detected subgraph through a trained feature extraction network; inputting the to-be-detected feature vector into a Gaussian model to obtain a Gaussian probability of the to-be-detected subgraph, wherein the Gaussian model is obtained by fitting feature vectors of a plurality of defect-free training subgraphs; restoring a plurality of to-be-detected subgraphs into the to-be-detected image, and marking and outputting a detection result of the restored to-be-detected image based on the Gaussian probability. The embodiment of the application realizes automatic detection of whether tearing and crushing defects exist on the surface of the honeycomb material to be detected, and improves the detection efficiency.

The application discloses an ultrathin defect-free ZIFs@GO composite film, a preparation method and application thereof, and comprises the following steps: 1) preparing GO by a modified Hummers method; 2) depositing GO on a polymer base film to prepare a GO composite film; and 3) growing ZIFs coordination polymers on the GO composite film by an interfacial counter-diffusion method to prepare the composite film. The application optimizes the ZIFs synthesis conditions and reduces non-selective defects to improve the separation performance of the ZIFs film. In the reverse diffusion process, GO acts as a barrier to make the precursor diffuse along the interlamellar gap and greatly slow down the diffusion rate; by optimizing the driving force of diffusion in the solution, the ZIFs crystallization rate can be accurately matched, the ZIFs growth content can be effectively reduced, and the generation of intercrystalline defects can be reduced. The GO lamella is rich in oxygen functional groups, which provides sites for the heterogeneous nucleation of ZIFs, especially at the edges and defects of the GO lamella, so that the non-selective defects in the GO film can be effectively reduced; meanwhile, the nanoscale limitation enables the ZIFs heteroepitaxial growth to be carried out along the two-dimensional channel instead of the vertical direction, which is beneficial to the formation of an ultrathin crystal structure and realizes the preparation of the ultrathin defect-free composite film.

This invention discloses a method for local repair of downgraded quartz crucibles and the repaired quartz crucible, relating to the field of quartz crucible repair technology. The key technical points include the following steps: classifying the quartz crucibles to be graded according to defect size; classifying quartz crucibles with defect sizes no larger than a preset threshold as repairable C1 grade, and quartz crucibles with defect sizes larger than the preset threshold as C2 grade for providing repair material; removing the defective area of ​​the C1 grade quartz crucible to form a notch; cutting and obtaining repair material from the defect-free area of ​​the C2 grade quartz crucible, the size of the repair material being configured to be larger than the notch size; locally heating the edge of the repair material to be joined to the quartz softening temperature, then pressing the softened repair material into the notch, and after cooling, forming an integral part with the C1 grade quartz crucible. This invention can utilize previously scrapped quartz crucibles, effectively improving the yield of downgraded quartz crucibles and reducing raw material consumption.

The application discloses a preparation method of a Cd rotating target material and belongs to the technical field of semiconductor materials, and comprises the following steps: (1) installing an inner lining pipe in a mold, metalizing the outer surface of the inner lining pipe, and sealing a mold assembly by a back plate and the mold; (2) preheating the inner wall of the mold and the outer wall of the inner lining pipe; (3) melting Cd ingots and uniformly stirring; (4) pouring the molten Cd into the cavity of the mold assembly and keeping warm; (5) segmenting the mold assembly from top to bottom, with the length of each segment being 100-200 mm, and segmenting and cooling from bottom to top; after each segment is cooled, the segment above is cooled, until the uppermost segment is cooled, solidification is completed, demolding is performed, and the Cd rotating target material is obtained; the Cd rotating target material is uniform in internal microstructure, free of defects and pores, and high in compactness.

The invention provides a programmed generation and automatic labeling method for surface defect textures of industrial equipment, which comprises the following steps of: performing multi-working-condition texture acquisition and standardization processing on the surface of defect-free equipment, and establishing an equipment surface texture substrate library; joint texture feature extraction is carried out on the corrosion area and the deposition crystallization area, and a structure description set of corrosion and deposition mixed textures is constructed; based on the improved generative adversarial network, generating a corrosion and deposition coexisting mixed defect texture image on the substrate texture of the texture substrate library by taking the structure description set as a constraint; pixel-level masks are synchronously generated based on pixel position records in the generation process, and automatic labeling of defect areas is achieved; the generated defect images and the annotation information are sorted into a standardized sample set, the standardized sample set is divided according to the proportion, and a data set matched with a mainstream training framework is output, the method can truly reflect generation and automatic annotation of defect textures under the corrosion and scaling coexistence scene of the chemical equipment, and the problem that the generated textures are single is solved.

The invention discloses a casting system and a casting method based on castings for post-processing trepanning, and belongs to the technical field of casting. Comprising a sand box, a cavity is formed in the sand box to form a pouring unit and at least one mold cavity, the pouring unit forms an opening in the upper surface of the sand box, the mold cavity is communicated with the pouring unit, in the casting process, molten iron enters the mold cavity from the pouring unit, and a casting is formed after the mold cavity is filled with the molten iron. The pouring device is characterized in that the pouring unit sequentially comprises a pouring gate box, a pouring gate box base, a transverse track and at least one riser according to the molten iron injection sequence, and a boss which is gradually shrunk towards the interior of the riser is arranged on the side surface of the riser. The position, needing to be drilled, of the casting has no defect on the hole wall.

The present disclosure relates to an advanced dip-coating apparatus and a dip-coating method using the same. More specifically, the present disclosure relates to an advanced dip-coating technology that prevents meniscus formation, inhibits infiltration into pores inside of a support, forms a thin film having a uniform thickness and provides a defect-free dense thin film coating layer by controlling the three parameters of coating solution viscosity, substrate withdrawing rate and air spinning flow rate.