45results about How to "Meet technical requirements" patented technology

The invention discloses a locating and sizing planning method and system based on improved multi-objective differential evolution, and relates to the technical field of electric power system planning and optimizing.The method comprises the steps that electric power system data are collected and processed, and the electric power system data comprise network topology, line parameters, load characteristics and generator set parameters; the method comprises the following steps: establishing a static var compensator locating and sizing planning model based on power system data, setting an objective function, and formulating a constraint condition set; a self-adaptive variation strategy and an elitism strategy are introduced, and a multi-target differential evolution algorithm is improved; according to the method, a self-adaptive variation strategy and an elitism strategy are introduced, and the improved multi-target differential evolution algorithm is combined, so that the searching capability and the convergence of the algorithm are greatly improved, and the optimal locating and sizing scheme is obtained. And the optimal solution can be more efficiently searched in the complex solution space.

The invention discloses a nickel-based powder superalloy powder-state return scrap recycling and remelting method which comprises the following steps: packaging powder-state return scraps by using a metal foil bag, putting the packaged powder-state return scraps into a crucible of a vacuum induction melting furnace, vacuumizing, and carrying out low-power power transmission melting; gradually adding the packaged powder-state return scrap into the crucible or adding the packaged powder-state return scrap into the crucible by several times until the packaged powder-state return scrap is completely added into the crucible, and carrying out full-power power transmission smelting; after melting the melt, heating to a refining temperature, increasing the vacuum degree, and refining; carrying out electromagnetic stirring on the refined powder-state return scrap melt, and then cooling to a pouring temperature; and the powder-state return scrap melt is poured into a steel mold after being subjected to slag blocking through a slag blocking plate and filtered through a two-stage filter, and a powder-state return scrap remelting master alloy ingot is obtained. According to the method, the 100% powder state return scrap is directly adopted for smelting, and the content of oxygen, nitrogen and hydrogen elements in the prepared 100% powder state return scrap remelting ingot is low.

The invention discloses pre-swelling multipolymer high-viscoelastic asphalt modified particles and a preparation method thereof, and belongs to the technical field of road engineering materials. The pre-swelling multipolymer high-viscoelastic asphalt modified particles are prepared from the following components in parts by weight: 10 to 40 parts of desulfurized waste tire rubber powder, 20 to 30 parts of styrene-butadiene-styrene block copolymer, 15 to 20 parts of adhesive, 10 to 17 parts of compatilizer, 13 to 18 parts of tackifier and 2 to 5 parts of auxiliary agent. In the pre-swelling multi-polymer high-viscoelastic asphalt modified particle provided by the invention, the desulfurized waste tire rubber powder is pre-swelled in the compatilizer, and the SBS develops in advance in the asphalt adhesive to form a continuous phase system which is not easy to deform and has a certain degree of elastic property with asphalt; according to the preparation method, high-volume desulfurized waste tire rubber powder and SBS in the prepared modified particles can be stably dispersed in matrix asphalt, the performance is rapidly improved, the construction workability is improved, and the modified particles have the advantages of good viscoelasticity, adjustment and optimization as required, stable system, high economic benefit and the like.

The invention discloses hot rolled steel for a 500MPa-grade high-ductility hollow anchor rod welded pipe as well as a preparation method and application of the hot rolled steel, and belongs to the technical field of hot continuous rolling plate strip production. The hot rolled steel for the 500MPa-grade high-ductility hollow anchor rod welded pipe is prepared through smelting, casting blank heating, rough rolling, coiling of a hot coiling box, finish rolling, laminar cooling and coiling. The yield strength is larger than or equal to 500 MPa, the tensile strength is larger than or equal to 600 MPa, the percentage elongation after fracture is larger than or equal to 26%, and the maximum force percentage elongation is larger than or equal to 14%. The hot rolled steel is subjected to the machining procedures of heating of a high-frequency electric heating device, three-roller spinning equal-diameter rolling, online heat treatment, saw cutting and slow cooling of a cooling bed, and a hollow anchor rod body is obtained; the yield force is larger than or equal to 150 kN, the tensile resistance is larger than or equal to 200 kN, and the maximum force elongation is larger than or equal to 6%. The method can effectively solve the problem that the ductility of the hollow anchor rod body prepared after heat treatment is poor due to the fact that existing anchor rod steel cannot have strength and ductility at the same time.

The invention discloses a vibration reduction device and method for fluid resonance in a deep sea FPSO moon pool, and the method comprises the following steps: 1, evaluating the geometric structure and fluid dynamic characteristics of the deep sea FPSO moon pool, the geometric structure comprises the size and shape of the moon pool, and the fluid dynamic characteristics comprise the flow velocity and direction of fluid in a set time period; calculating the resonant frequency of the fluid in the moon pool based on the geometric structure and the fluid dynamic characteristics by adopting a three-dimensional fluid dynamic simulation technology; and 2, based on the fluid dynamics data sample obtained through evaluation, the layout and configuration scheme of vibration reduction equipment is designed, and the vibration reduction equipment comprises at least three vibration reduction units. By accurately evaluating the geometric structure and fluid dynamic characteristics of the moon pool and adopting proper vibration reduction equipment, fluid resonance in the moon pool can be effectively reduced, so that the structural stability and safety of the FPSO are improved. And the resonance phenomenon is reduced, so that the structural fatigue is prevented, and the service life of the FPSO is prolonged.

The invention discloses a production method of a 460MPa-grade high-strength steel plate with the thickness of 50-80mm for wind power equipment. The production method comprises the following main process steps and parameters: step 1, smelting and continuous casting production process flow: KR desulfurization, converter treatment, LF refining, RH vacuum treatment, slab continuous casting and slow cooling; secondly, the plate blank is put into a furnace to be heated; the in-furnace time, the soaking time and the tapping temperature of the plate blank are strictly controlled, the in-furnace time is larger than or equal to 220 min, the soaking time is 30-60 min, and the tapping temperature is 1230 + / -20 DEG C; thirdly, rolling the plate blank, specifically including rough rolling and finish rolling; fourthly, the steel plate is straightened; and 5, quenching and tempering heat treatment of the steel plate. The method is simple to operate and suitable for industrial production. The quenched and tempered steel plate produced through the method is high in strength, good in impact toughness and excellent in forming performance and welding performance, and the mechanical performance and the technological performance meet the technical requirements of users.

The invention discloses a battery, and belongs to the technical field of batteries. The battery comprises a positive current collector, a negative current collector and a diaphragm, the tensile strength a1 of the positive current collector, the tensile strength a2 of the negative current collector, the elongation b1 of the positive current collector, the elongation b2 of the negative current collector, the diaphragm rupture temperature c, the diaphragm thermal shrinkage rate d and the diaphragm hole closing temperature e meet the following relational expression: N1 = (a1 + a2) * (b1 + b2) * c / d / e, wherein the N1 is the safety coefficient of the battery, and the N1 is 416 to 25600. The battery disclosed by the invention can simultaneously consider high energy density, high cycle capacity retention ratio and safety, and meets the technical requirements of customers.

The invention relates to the technical field of liquid aromatherapy packaging materials, and discloses a high-barrier breathable PE packaging film and a preparation process thereof.The high-barrier breathable PE packaging film is prepared from low-density polyethylene resin and metallocene polyethylene resin as raw materials, a polyolefin elastomer as a flexibilizer and surface alkylated calcium carbonate as a pore-foaming agent; the preparation method comprises the following steps: preparing a low-temperature heat-sealing microporous breathable PE film through melt blending, extrusion granulation, film blow molding and uniaxial stretching processes, and compounding the low-temperature heat-sealing microporous breathable PE film subjected to release coating pretreatment with a barrier composite film to prepare the high-barrier breathable PE packaging film. Aiming at the contradictory technical requirements that box-packed liquid aromatherapy packaging materials need both high barrier and ventilation, a new product solution is provided, the outer barrier type composite film is uncovered during use, the inner low-temperature heat-sealing type microporous ventilation PE film releases aromatherapy gas molecules, and the aromatherapy effect is achieved. Under the condition that the barrier type composite film is not used, the technical effect of light shielding and barrier is achieved.

The invention relates to the technical field of energy storage management, in particular to an energy storage capacity optimal configuration method based on a shared energy storage mode. The method comprises the following steps: carrying out target area load characteristic index extraction by using a power dispatching center, and generating energy storage area load characteristic data; node association strength processing is carried out according to the energy storage area load characteristic data, and power grid node association topological data is generated; acquiring regional power supply plan data; performing space-time coupling supply-demand balance analysis on the regional power supply plan data based on the load characteristic data of the energy storage region to generate complementary potential data between corrected regions; and carrying out shared energy storage node capacity optimization according to the complementary potential data among the correction regions, and generating dynamic energy storage capacity configuration data. Through cross-regional electric energy fine scheduling management, the shared energy storage capacity optimization configuration is realized, the problem of power supply and demand matching is effectively solved, and the acceptance capability of a power grid to renewable energy sources is improved.

The invention discloses a method and system for synchronously opening and closing a door of a virtual marshalling train, and the method comprises the steps: evaluating the communication delay between the ATO of a front train and the ATO of a rear train in the virtual marshalling; and the ATO of the front vehicle sends a door opening and closing command, and the sending time of the door opening and closing command is adjusted through the communication delay, obtained through evaluation, between the ATO of the front vehicle and the ATO of the rear vehicle, so that synchronous door opening and closing are achieved. According to the invention, after the trains in the virtual marshalling are parked at the platform, the doors of the two trains can be opened and closed at the same time.

The application relates to the technical field of nuclear fuel assembly manufacturing, and particularly discloses a nuclear fuel assembly casting type upper tube seat machining clamp and a machining method, wherein the tube seat blank is placed on a bottom plate, a positioning top block is pushed, four positioning pins below a positioning push rod are centered with positioning holes of the tube seat blank; then a positioning rod B is screwed to shorten the distance with a positioning rod A; then locking screws and fastening bolts on the edge frame of a positioning frame plate are locked to fix the tube seat blank on the bottom plate, positioning is realized; finally, the positioning rod B is completely screwed out of the positioning rod A, the bottom plate, the positioning frame plate and the tube seat blank are integrally taken out and fixed on a machining equipment. The machining clamp and the machining method satisfy the positioning clamping and machining requirements of the casting type upper tube seat, the upper tube seat after machining completely satisfies the drawing and technical condition requirements, and the machining scheme satisfies the engineering production.

The invention provides a stepless adjustment shading device for an aircraft glare window and an assembly method thereof, and belongs to the technical field of aviation technology living facility system design, and the stepless adjustment shading device for the aircraft glare window comprises a decorative plate, a window frame, a shading plate, a support, two sliding rail assemblies and organic glass; the support is arranged on the window frame, the window frame is fixed on the decorative plate, one parts of the two sliding rail assemblies are fixedly installed on the decorative plate, and the other parts of the two sliding rail assemblies penetrate through the decorative plate and are connected to the support on the window frame; the organic glass is fixedly installed on the two sliding rail assemblies, and the shading plate is located between the two sliding rail assemblies and can move up and down along the two sliding rail assemblies. The dazzle window can be decorated by an airplane, and meanwhile the technical requirement that the dazzle window is provided with the light shielding plate is met; the operation shading plate can freely slide in a guide rail of the sliding rail assembly and can be stopped at any position, and the stepless adjusting function of the dazzle window shading plate is achieved; the overall weight is light.

The invention relates to the technical field of piston ring processing, and discloses an online monitoring system for piston ring doctor blade processing quality, which comprises a detection unit, a transmission unit, an integrated analysis unit and the like. According to the device, the outline data of outer circle winding of the doctor blade can be monitored on line, so that real-time roundness value data and waviness value data can be obtained through calculation, it is guaranteed that products completely meet the technical requirements, and unqualified products are completely eradicated. Meanwhile, through online monitoring, quality problems can be found and processed in time, batch quality problems are avoided, and losses and influences are reduced. A mapping relation between product quality and equipment, processing personnel or other related factors is established, the influence of manual control of mold precision, assembly precision and service life on roundness and waviness can be verified, and a direction is indicated for a subsequent quality improvement strategy. And the product batch information is obtained and recorded during processing, so that process tracing can be conveniently carried out when needed.

The utility model discloses a novel polisher machine device which comprises a polisher machine body, a rotating disc and a stand column arranged in the middle of the upper end of the polisher machine body, a fence arranged on the edge of the outer side of the upper end of the polisher machine body, an electrical intelligent panel installed on the outer side of the fence, a servo motor installed at the top end of the stand column and a spindle motor installed at the side end of the stand column in a translation mode. A cam divider is arranged in the middle of the bottom end of the rotating disc, a plurality of inner expansion shafts and gears which are evenly distributed are arranged around the outer edge of the upper end of the rotating disc, a waterproof motor is further arranged at the bottom end of the rotating disc, and the other ends of the inner expansion shafts extend downwards to penetrate through the rotating disc and are provided with springs and jacking air cylinders which are matched with each other; through selection and application of the finishing brush, the traditional process of previous finishing grinding can be replaced, through comprehensive application of end face forward brushing, end face reverse brushing and tooth-shaped side brushing, the technical requirements of customers are met, the multi-station structural mode of the index plate guarantees the production takt of products, and the capacity requirement of the products is met.

The invention relates to the field of carburizing heat treatment processing, in particular to a 15CrA high-hardness carburizing, quenching, ice-cooling and tempering heat treatment process method. Methanol and propane are used as carburizing agents, namely methanol and propane are used as enriching agents, the carbon potential is controlled to be 1.15% C, a carbon determination method is used for comparing the consistency of an actual value and a display value of the carbon potential in a furnace, the accuracy of the carbon potential is ensured, and the accuracy of the carbon potential is improved. And carburizing is conducted at the temperature of 910 DEG C, then the hardness is adjusted through normalizing, and finally through quenching, ice-cooling and tempering, the high hardness HRC larger than or equal to 62 is obtained, and the depth of a carburized layer reaches 1.3-1.7 mm.

The invention relates to the field of heat treatment processing, in particular to a 1J22 soft magnetic material thin-wall part vacuum annealing process method which comprises the following steps: (1) manufacturing a 1J22 soft magnetic material sample, and cleaning a part and the sample; (2) charging the part and the sample into a furnace; (3) performing primary annealing on the part and the sample; (4) performing magnetic detection on the sample subjected to primary annealing, if a magnetic detection result meets requirements, executing the step (5), otherwise, adjusting parameters of primary annealing, and repeating the steps (1)-(3); (5) the part and the sample are subjected to finish machining; (6) carrying out secondary annealing on the part and the sample subjected to finish machining; and (7) carrying out magnetic detection on the sample subjected to secondary annealing, if a magnetic detection result meets the requirement, ending the annealing process, otherwise, adjusting parameters of secondary annealing, and repeating the step (6).

A 6000 series aluminum alloy medium and thick plate for spinning rims, the aluminum alloy raw material is composed of the following components in weight percentage: Si=0.45~0.75, Fe<0.65, Cu=0.25~0.35, Mn<0.10, Mg=0.95~1.15, Cr=0.15~0.30, Zn<0.20, Ti<0.10, the remainder is Al and inevitable impurities. The preparation process adopts precision heat treatment and rolling control technology to achieve the fine second phase and grain structure of aluminum from ingot to plate and strip. The finished aluminum alloy plate is 6~8mm thick, the grain size is ≤50μm, the second phase size is ≤10μm, the tensile strength is ≥100MPa, the yield strength is 35~90MPa, the elongation is ≥30%, and the rim surface prepared by spinning forming has no orange peel problem, which can better meet the technical requirements of aluminum for rims.

The invention belongs to the technical field of rubber plastic machinery, and discloses a high-precision gear phase assembling device. Comprising a gear phase centering device and a gear shaft phase hoisting device. The gear is mounted on the gear phase centering device, and the gear shaft is mounted on the gear shaft phase hoisting device; and the gear and the gear shaft are positioned and aligned through the gear phase centering device and the gear shaft phase hoisting device. All the components are assembled on the gear and the gear shaft in advance, the gear and the gear shaft can be correctly assembled within the extremely short cooling window period, the high-precision phase requirement of the gear and the gear shaft is smaller than or equal to 1 '11' + / -0.05 mm, and the method is actually applied to production and actual inspection and completely meets the technical requirements of customers.

The invention belongs to the technical field of coatings, and discloses epoxy inner wall baking varnish as well as a preparation method and application thereof. The epoxy inner wall baking varnish comprises epoxy modified organic silicon resin, full-etherified amino resin, an auxiliary agent and a solvent, the epoxy value of the epoxy modified organic silicon resin is 0.08 mol / 100g to 0.16 mol / 100g. According to the epoxy inner wall baking varnish, epoxy modified organic silicon resin with a specific epoxy value is matched with full-etherified amino resin to serve as matrix resin, single-component baking varnish is prepared, and the epoxy inner wall baking varnish is used for transformer inner wall paint and is excellent in insulativity, capable of meeting the extra-high voltage requirement, good in corrosion resistance, good in compatibility with transformer insulating oil and good in high-temperature discoloration resistance.

The invention provides a method for qualitatively detecting a safflower component in honey by using real-time fluorescent PCR (Polymerase Chain Reaction). The method comprises the following steps: extracting DNA (Deoxyribose Nucleic Acid) in a honey sample; designing and synthesizing a primer and a probe sequence of a safflower specific gene; and carrying out real-time fluorescent PCR reaction, and reading and analyzing a fluorescent signal so as to judge whether the honey sample contains the safflower component or not. The real-time fluorescence PCR method can be used for effectively detecting the safflower specific gene segment in the honey sample, the specificity is good, the detection limit is 1%, and the method is suitable for qualitative detection of the safflower component in the honey.

The invention provides a cold rolling method for reducing the wave shape of a TC4 titanium alloy seamless pipe, and relates to the technical field of cold rolling machining of titanium alloy seamless pipes, and the cold rolling method comprises the steps that the length distribution proportion of a finishing section and a working section in a pass deformation area is calculated according to the feeding amount, the rotation amount, rolling mill parameters and material characteristics; and rolling the blank into a finished blank according to the length distribution proportion of the finishing section and the working section. By optimizing deformation tools such as a core rod and a roller hole pattern, the feeding amount and the rotation angle are reasonably adjusted, and wave shapes of the inner surface and the outer surface are effectively generated; according to the characteristics and technical requirements of different TC4 titanium alloy seamless tubes, the cold rolling tube manufacturing process is implemented, the surface defect loss of the titanium alloy tube is reduced, the effect of improving the surface rolling quality is continuous and stable, and the effects of energy conservation, emission reduction and consumption reduction are remarkable.

The invention relates to a monomer for a thermal crosslinking type high-temperature-resistant polyimide film material, the polyimide film material and a preparation method of the polyimide film material. The diamine monomer is 6-(2, 3, 5, 6-tetrafluoro-4-vinyl phenoxy) pyrimidine-2, 4-diamine, and the solvent is a solvent. The preparation method comprises the following steps: copolymerizing a monomer with other diamine monomers and dianhydride monomers to prepare polyimide, introducing a tetrafluorostyrene structure on a polyimide main chain, and thus preparing the thermal crosslinking type high-temperature-resistant polyimide film. Through thermal crosslinking of vinyl and large-volume side groups, polyimide is endowed with the advantage of high temperature resistance and improvement of mechanical properties. According to the polyimide film material prepared by the invention, the temperature of 5% of mass loss at high temperature obtained by a thermogravimetric analyzer is 500-524 DEG C, the glass-transition temperature obtained by testing of a differential scanning calorimeter is 274-295 DEG C, and the technical requirements of a flexible substrate on a high-temperature-resistant PI material can be met.

The invention provides an on-chip variable resistance device structure and electronic equipment. The on-chip variable resistance device structure comprises a substrate, a nitride epitaxial layer, an electrode structure layer and a gate structure layer, wherein the nitride epitaxial layer is formed on the substrate; the electrode structure layer and the gate structure layer are formed on the nitride epitaxial layer; the electrode structure layer comprises a first electrode and a second electrode, the nitride epitaxial layer comprises a channel layer and a barrier layer which are used for forming a heterojunction interface, and the gate structure layer comprises a first semiconductor layer and a third electrode which are stacked and formed on the barrier layer, and a separation groove formed in the first semiconductor layer. By regulating and controlling the extension path and the structure parameter of the separation groove on the barrier layer and combining the applied voltage of the third electrode, the concentration and the distribution of two-dimensional electron gas at the heterojunction interface and the dynamic control of a conductive channel can be realized, so that the wide-range and high-precision dynamic adjustment of the on-chip resistance device structure on-resistance is realized, and the on-chip resistance device is suitable for large-scale production. The technical requirements of a high-performance integrated system on the on-chip variable resistor are met, and the on-chip variable resistor has important application value.

The invention discloses a cold deformation device and method for a large aluminum alloy disc, and relates to the technical field of forging. The invention discloses a large aluminum alloy disc cold deformation device which comprises a finish forging upper die plate, a finish forging punch, a cold deformation punch and a plurality of cold deformation dies, the finish forging upper die plate is located at the bottom of the device, the finish forging punch is installed in the finish forging upper die plate, the cold deformation punch is located at the top of the device, and the diameter of the top end of the finish forging punch is smaller than that of the bottom end of the finish forging punch. The finish forging puncher pin is in a circular ring shape, the edge of the finish forging puncher pin is a fillet, the outer size of the finish forging puncher pin is the same as the inner size of the large aluminum alloy disc piece, and the multiple cold deformation dies are in a circular ring shape and are used for pressing different cold deformation areas correspondingly during cold deformation. According to the cold deformation forming method for the large aluminum alloy disc, the deformation amount is controlled to be 1%-3% in a subarea mode, the subsection deformation area is 0.5-1 m < 2 >, the cold deformation pressure is larger than 5 MN, and final forming of a product is achieved through subsection type cold deformation.

The invention relates to a processing technology for preparing a steel strip for high manganese austenite low temperature steel flux-cored welding wire. The technical scheme comprises the following steps: polishing and grinding a high manganese austenite low temperature steel hot rolled strip, cold rolling, welding and coiling the strip; then performing four annealing heat treatments and cold rolling, and finally performing one annealing heat treatment: the temperatures (°C) of the five annealing heat treatments are 950-1080, 980-1100, 970-1060, 950-1040, 980-1020, the heat preservation time is 0.5-1.0 hour, and the protective atmosphere is hydrogen; the cooling rates (°C / min) are 100-120, 120-140, 140-160, 240-260, 280-300, the thicknesses (mm) of the four cold rollings are 1.5-2.3, 0.8-1.5, 0.6-0.8, 0.4-0.6, and trimming is performed to obtain a steel strip for preparing a high manganese austenite low temperature steel flux cored welding wire. The invention has simple ingredients, low powder filling rate and high production efficiency. The manufactured product is suitable for all high manganese austenite low temperature steel flux cored welding wires and meets the technical requirements for preparing high manganese austenite low temperature steel matching flux cored welding wires.

The invention relates to a silver-ruthenium alloy slurry suitable for a multilayer ceramic capacitor and a preparation process thereof, and the preparation process comprises the following specific steps: carrying out sandpaper polishing pretreatment on a ruthenium target to remove a surface oxide layer, and drying to obtain a treated ruthenium target; the treated ruthenium target is immersed in a solution containing silver nitrate, and nanosecond pulse laser is focused on the surface of the ruthenium target for laser scanning ablation; and after ablation is completed, the ruthenium target is taken out, liquid obtained after laser scanning ablation is collected, centrifugal collection is carried out, drying treatment is carried out after cleaning and centrifuging, and a powder product, namely the silver-ruthenium alloy material is obtained. And putting the obtained silver-ruthenium alloy material, an organic auxiliary agent, inorganic nonmetal powder and other metal powder into a ball mill according to a proportion, uniformly mixing under high-energy grading ball milling and stirring, and keeping the temperature for a period of time to obtain the silver-ruthenium alloy slurry. The silver-ruthenium alloy slurry has the advantages of high-temperature sintering resistance, simple preparation process, narrow particle size distribution, controllable particle size, good dispersity and stability and the like, and overcomes the defects of poor stability, no high-temperature resistance, complex preparation process and the like of the existing conductive slurry.

The utility model provides a centering mechanism, which belongs to the field of centering mechanisms, and comprises a U-shaped bracket, a positioning clamp mechanism, a rolling guide wheel and a driving mechanism, in the scheme, the output end of a positive and negative rotation motor rotates to drive a synchronous wheel to rotate, the synchronous wheel rotates to drive a synchronous belt to rotate, and the synchronous belt rotates to drive a connecting rod A and a connecting rod B to move simultaneously; the connecting rod A and the connecting rod B move at the same time to drive the two sliding blocks to move close to each other, the sliding blocks are connected to the guide rails in a sliding mode so that the sliding blocks can slide on the guide rails, the two sliding blocks move close to each other at the same time to drive the eight rolling guide wheels to move at the same time, and a packaging box can be clamped through the eight rolling guide wheels. By means of the technical scheme, products are centered, it is guaranteed that packaging boxes are centered and labeled, the technical requirement is met, and the problems that in the prior art, the packaging boxes deviate in the conveying process, it cannot be guaranteed that the packaging boxes are kept centered when the products pass through a labeling station, and centered labeling cannot be conducted are solved.

The invention provides a cold rolling method for reducing surface cracks of a TC4 titanium alloy seamless tube, which relates to a cold machining tube manufacturing technology for producing seamless tubes in metallurgy and machinery industries, and comprises the following steps of: rolling a blank with the specification of phi 76 * 7.5 mm into a finished blank with the specification of phi 25 * 3mm by adopting a two-roller cold rolling mill; the left opening and the right opening of the pass used during rolling are asymmetrically designed, Fx1 and Fx4 are not changed, and the sizes of Fx2 and Fx3 are increased by 0.1 mm compared with those of Fx1 and Fx4, so that the long axis part of the section ellipse of the seamless tube can be accommodated; meanwhile, the opening angle is not changed, and the opening angle Fw2 is increased by 5 degrees compared with the opening angle Fw1; deformation tools such as a core rod and a roller pass are optimized, the feeding amount and the rotation angle are reasonably adjusted, and cracks on the inner surface and the outer surface are effectively prevented; according to the characteristics and technical requirements of different TC4 titanium alloy seamless tubes, the cold rolling tube manufacturing process is implemented, the surface defect loss of the titanium alloy tube is reduced, the effect of improving the surface rolling quality is continuous and stable, and the effects of energy conservation, emission reduction and consumption reduction are remarkable.

The present invention provides a composite thermal insulation mortar of arsenic sandstone pottery sand and desert sand and its application, belonging to the technical field of thermal insulation materials. The thermal insulation mortar provided by the present invention is composed of the following components: cement, fine aggregate and water, wherein the fine aggregate is porous pottery sand and desert sand, and the porous pottery sand is obtained by sintering arsenic sandstone. The present invention adds porous pottery sand prepared by sintering arsenic sandstone as a thermal insulation material, which has a porous structure, so that the thermal insulation mortar has good thermal insulation performance. At the same time, desert sand and porous pottery sand are compounded, and the particle size and ratio of the two are controlled, which can ensure that the mortar has good strength, so that the thermal insulation mortar can meet the technical requirements, and at the same time, arsenic sandstone and desert sand can be utilized as resources, which is energy-saving and environmentally friendly.

The invention discloses a cold heading processing technology of a stainless steel fire-fighting sprinkler, which comprises the following steps: (1) putting a stainless steel coiled wire material on a material rack, feeding the stainless steel coiled wire material into a line pressing wheel through an automatic straightening wheel feeder of a cold heading nut machine, heating, feeding the stainless steel coiled wire material into a machine body, and cutting the stainless steel coiled wire material into a gram weight or length required by the fire-fighting sprinkler; (2) after cutting off, feeding into a primary die by using an outer cutter holder for shaping; (3) after the first-order shaping is completed, the first-order shaping rod is overturned through a first-order mold clamp to be fed into a second-order mold shaping and shrinking rod; (4) after the second-order shaping and shrinking are completed, a second die clamp is used for horizontally moving and feeding into a third-order die for stretching a large head, and meanwhile, the shrinking rod extrudes an ear nozzle for semi-forming. A pure mechanical production process of a cold heading nut machine is adopted, the SUS304 or D665A stainless steel coiled wire material with excellent performance is perfectly manufactured into the fire sprinkler meeting the use requirement through the technological process, and meanwhile the adopted stainless steel coiled wire has good mechanical strength and corrosion resistance.