31results about How to "Reduce deformation defects" patented technology

The invention relates to a fine-pottery sanitary ceramic body and a manufacturing method thereof and belongs to the technical field of ceramic products, which is used for reducing the deformation of a sanitary ceramic product and improving the quality of glaze. The fine-pottery sanitary ceramic body is characterized in that a body raw material comprises the following components in part by mass: 10 to 30 parts of ball clay, 30 to 60 parts of kaoline, 5 to 15 parts of porcelain clay, 5 to 15 parts of quartz and 5 to 15 parts of wollastonite, wherein the kaoline comprises 10 to 25 calcined kaoline. In the manufacturing method, the raw materials and the adding proportion of the fine-pottery body are preferably selected, the crystal phase content of mullite, quartz and the like is controlled, and the glass phase content and the high-temperature plastic deformation are reduced so as to fulfill the aim of reducing the deformation of fine-pottery sanitary ceramics; while reducing the hygroscopic expansion of the body, the manufacturing method improve thermal expansion coefficient of the body at the temperature of 200 DEG C to make the glaze bear high compressive stress, thereby improving the anti-cracking performance of products and ensuring enough long service life. Through the refinement of slurry granularity, the method remarkably reduces the occurrence of disadvantage of glaze pinholes, does not need to reduce the pinholes by using engobe, simplifies a production process, and improves the production efficiency and the qualification rate of the products.

The invention discloses a tool assembly for machining axial flow pump blades, and a precision machining method for axial flow pump blades, and belongs to the technical field of machining. The tool assembly is composed of a rough milling tool, a vibration aging tool, a grinding tool, a semi-fine milling tool, a combined type pneumatic tool and a shot blasting nozzle tool together. The tool assemblyis used for completing the machining procedure of rough machining, aging, semi-fine machining, linear cutting outline, aging, fine machining and high-speed shot blasting surface strengthening. The tool assembly is novel, easy and convenient to operate and reasonable in precision machining method, the machining efficiency and machining accuracy are improved, the corrosion resistance and fatigue strength of blades are improved, the deformation defects in the use process are lessened, and the service life of the pump blades is further improved.

A packaging apparatus comprises tray-like damping members (5) and a pipe-shaped outer box (10). Steps (6, 7, 8, 9) formed by reducing the thicknesses of rise parts (1, 2, 3, 4) on all the outer peripheries of the ends of the rise parts are formed in the tray-like damping members (5) having the rise parts (1, 2, 3, 4) therearound. Both ends of an article (18) to be packaged are supported by the damping members (5). The steps (6, 7, 8, 9) and the article (18) are covered and the damping members (5) are connected to each other by the outer box. A band (11) is fixedly wrapped and tied around the entire part of the packaging device to package the article (18). Since the end faces of the outer box (10) are protected by the damping members (5), the outer box (10) is prevented from being damaged during the transportation. Consequently, the quality of the article during the transportation can be improved.

The invention discloses a wood plastic environment friendly ecological material and a production technology of the wood plastic environment friendly ecological material, belongs to the technical field of material design, and aims to provide a firm wood plastic environment friendly ecological material with consistent quality. The material comprises, by mass, 60 to 70 parts of plant fiber, 30 to 40 parts of hot melt plastic and 3 to 8 of additives. The preparation method includes weighing each component; pouring plant fiber powder into a mixer set to be subjected to coupling dehydration, then adding plastic powder and additives to subject the powder to preplasticization mixing, and obtaining a pre-polymer; adding the pre-polymer into an internal mixer to be plasticized fully and mixed evenly, placing the pre-polymer into an insulation hopper of an extruder through a delivery tray, so that plant fiber and thermoplastic polymer blends and surfaces pass through co-extrusion plastic; performing surface coating through a surface functional material coating device, and manufacturing products through a hot rolling device, a cool rolling device and a tractor; and cutting a needed length through a cutting machine.

The invention discloses a cross laminated wood structure and a manufacture method thereof. The cross laminated wood is formed by combining at least three layers of materials which are respectively an upper first surface layer, a middle core layer and a lower second surface layer, wherein the first surface layer, the core layer and the second surface layer are fixed through glue. The manufacture method comprises the following steps: selecting materials; performing rounding; forming stress release grooves; drying; performing rough shape cutting; performing broaching; assembling a blank; pressing a plate and the like. According to the cross laminated wood structure and the manufacture method thereof, the drying stress is effectively released, the drying defects are reduced, and the drying energy consumption is reduced; and as the stress release grooves are reserved in two surface finger joint laminated boards of the cross laminated wood, it is ensured that the moulded cross laminated wood is relatively high in dimensional stability in a humid and dry environment. In addition, the stress release grooves are relatively scattered in the cross laminated wood, and the mechanical strength of the cross laminated wood is not affected, so that the technical problems that the strength is low and the stability is poor in an existing cross laminated wood technology are solved well.

The invention discloses a processing technology for reducing deformation defects in coal gangue hollow brick production, and relates to the technical field of wall materials, and the processing technology comprises the following specific steps: 1), performing processing to prepare zinc-aluminum hydrotalcite; 2), preparing a zinc-aluminum hydrotalcite colloidal solution and a graphene oxide colloidal solution; 3), preparing a graphene oxide/zinc-aluminum hydrotalcite compound; and 4), crushing the raw materials of the coal gangue hollow brick, uniformly mixing the crushed raw materials with thegraphene oxide/zinc-aluminum hydrotalcite compound, adding an N, N-dimethyldiacridine nitrate solution, uniformly performing mixing to obtain a mixture, and performing processing. According to the preparation method, the N, N-dimethyldiacridine nitrate solution is used for wetting the green brick raw material, and the graphene oxide/zinc-aluminum hydrotalcite compound is introduced into the greenbrick, so that water can be quickly discharged from the green brick, the distribution uniformity of residual water in the green brick can be improved, and the green brick can be uniformly shrunk in the roasting process; therefore, the effect of reducing the deformation defect after the green brick is fired is achieved.

The invention provides a GaN-based blue-violet light vertical cavity surface emitting laser chip and a manufacturing method thereof, and belongs to the field of semiconductor manufacturing. The first distributed Bragg reflector on the n-GaN substrate is arranged to comprise the non-doped AlN/GaN superlattice structure, the reflectivity is high, the quality is good, and the light extraction rate is improved. On the other hand, the second distributed Bragg reflector is arranged between the quantum well active layer and the p-GaN ohmic contact layer, stress is released, carrier overflow is inhibited, meanwhile, the hole barrier height is reduced, hole transmission is facilitated, and the device performance is improved. The quality and the light emitting efficiency of the obtained GaN-based blue-violet light vertical cavity surface emitting laser can be effectively improved on the whole, and stable use of the GaN-based blue-violet light vertical cavity surface emitting laser is ensured.

The invention relates to a folding screen middle frame structure and display device.The folding screen middle frame structure comprises a rotating shaft, a first frame body and a second frame body, and the first frame body and the second frame body are arranged on the two opposite sides of the rotating shaft respectively and rotationally connected with the rotating shaft; a first rotating shaft surface is formed on the inner side, close to the edge of the rotating shaft, of the first frame body, and the first rotating shaft surface gradually protrudes towards the inner side of the first frame body from the edge to the center; a second rotating shaft surface is formed on the inner side, close to the edge of the rotating shaft, of the second frame body, and the second rotating shaft surface gradually protrudes towards the inner side of the second frame body from the edge to the center. According to the middle frame structure of the folding screen, the rotating shaft surfaces of the two frame bodies are changed from the existing planes into the curved surfaces which are smoothly and upwards convex from the edges to the centers, so that the centers of the rotating shaft surfaces are higher than the edges, gaps between the rotating shafts and the frame bodies after the rotating shafts are assembled are structurally improved, and bad product deformation is reduced.

The invention provides a fused joint structure for a lamp, capable of obtaining stable high welding strength, reducing bad distortion and lack welding strength as well as bad welding through hole, and a method for manufacturing the same. The fused joint structure comprises a conductive member (5) made of high melting point metal, and a metallic foil (6), and is characterized in that the high melting point metal of the conductive member (5) is fused with the metallic foil (6) on an area where the metallic foil (6) is put together on a surface of the conductive member (5), and a circumferential edge of the concave portion of the metallic foil (6) is covered with the high melting point metal of the conductive member (5). Moreover, the method for manufacturing the fused joint structure is characterized in that a laser of more than 40MW/cm<2> energy is illuminated into the area where the metallic foil (6) is put together on a surface of the conductive member (5), from one side of the metallic foil (6) by a fiber laser device, to joint the conductive member (5) and the metallic foil (6).

The invention belongs to the technical field of superconducting wire preparation, and relates to a preparation method of a kilometer-level multi-core MgB2 superconducting wire. The preparation method comprises the steps of mixing Mg powder and B powder according to an atomic ratio of 1: 2, and grinding to obtain precursor powder; loading the precursor powder into a Cu/Nb tube to be assembled into a Cu/Nb/MgB2 single-core rod, and machining the Cu/Nb/MgB2 single-core rod to be the same as a Cu center rod in size through rotary swaging; sequentially sizing and cutting off the Cu/Nb/MgB2 single-core rod and the Cu center rod which are the same in size, and putting the Cu/Nb/MgB2 single-core rod and the Cu center rod into a Monel pipe to be assembled into a multi-core composite sheath; performing rotary swaging processing on the multi-core composite sheath to obtain a finished wire; and carrying out heat treatment on the finished wire rod to obtain the MgB2 multi-core superconducting wire. According to the method, the deformation defect in the wire is overcome in a rotary swaging machining mode, the phenomenon of core breakage or wire breakage is reduced, and the kilometer-level MgB2 superconducting wire which is uniform in performance and meets actual requirements is prepared.