46results about How to "Improve roundness" patented technology

The invention discloses modified high-carbon alloy steel and a preparation method and application thereof, and belongs to the technical field of high-carbon alloy steel for aluminum alloy forming dies. The preparation method disclosed by the invention comprises the following steps: carrying out electroslag remelting on a high-carbon alloy steel rod to obtain a casting blank; carrying out thermoplastic deformation on the casting blank to obtain a blank; the blank is annealed, so that carbides in the blank are eliminated or become fine particles, spherical graphite can be separated out, and the modified high-carbon alloy steel is obtained; the particle size of the fine particles is smaller than 10 microns. According to the method, coarse and large carbides which are difficult to eliminate in the high-carbon aluminum alloy forming die steel containing strong carbide forming elements such as Cr, Mo and V or medium-strong carbide forming elements are subjected to rapid and basic graphitization through a thermoplastic deformation and high-temperature graphitization combined process; the technical problem that carbide decomposition and graphite precipitation control are difficult to realize in the existing method is solved.

The utility model discloses a disposable nasogastric tube, relates to the technical field of medical instruments, and aims to provide a disposable nasogastric tube which not only can ensure rapid and accurate intubation, but also can relieve the pain of a patient to the greatest extent, and comprises a hose and a connecting end, one end of the hose is provided with an arc covered edge, and the other end of the hose is sleeved outside the connecting end. Comprising a connecting pipe used for being connected with a hose, a main port used for feeding or drainage and a flushing port used for air flushing or water flushing, and the main port and the flushing port are both communicated with the hose through the connecting pipe. Damage to the nasal cavity or the gastrointestinal tract inner wall of a patient in the insertion process is avoided as far as possible, and discomfort and pain of the patient are relieved.

The invention discloses a construction method of a colorectal tumor model based on 3D printing, which comprises the following steps: dissolving methacrylated gelatin and phenyl (2, 4, 6-trimethylbenzoyl) lithium phosphate together to obtain a mixed solution, adding colorectal cancer cells HCT-116 and human skin fibroblasts BJ into the mixed solution, and uniformly mixing to obtain bio-ink; and loading the bio-ink into a charging barrel of an extrusion type biological 3D printer for 3D printing to obtain the tumor cell-carrying gel microspheres, and culturing in vitro to obtain the tumor cell-carrying gel microspheres. According to the method, the upper limit of cell density of liquid drop biological 3D printing is broken through, stable printing of biological ink with the cell density as high as 1 * 10 < 8 > cells / mL is successfully achieved through optimization of a rheological window, the density is close to the physiological level of solid tumors, the printed tumor model can truly simulate the high compactness of the tumors and the nutrition / oxygen gradient effect caused by the high compactness of the tumors, and the tumor model has good application prospects. And an experimental platform closer to the in vivo is provided for researching the microenvironment heterogeneity in the tumor.

The application relates to the technical field of grinding equipment, and particularly discloses an electric tool output shaft mandrel positioning grinding equipment. The electric tool output shaft mandrel positioning grinding equipment comprises a spindle box and a grinding device, the spindle box is provided with a spindle, the spindle is provided with a self-centering clamping mechanism, the grinding device comprises a rack, a first driving device and a second driving device, the rack is provided with a rotating disc through a hollow shaft base, a plurality of sliding grooves are arranged on the rack, sliding seats are arranged in the sliding grooves, hollow guide pins and axles are arranged on the sliding seats, and a grinding wheel and a driven wheel are arranged on the axles; a guide groove matched with the hollow guide pins is arranged on the rotating disc, the rotating disc is driven by the second driving device, and all the driven wheels are driven by the first driving device. When fine grinding is carried out, the grinding wheel simultaneously works around the output shaft mandrel, the circumferential grinding cutting forces on the output shaft mandrel are offset, and the problems of position deviation, bending deformation and machining vibration caused by unilateral force on the output shaft mandrel are avoided, and the fine grinding precision is obviously improved.

This utility model discloses a video transmission cable for a robot, comprising: a data transmission line consisting of at least two signal transmission cores, a power line consisting of at least two power transmission cores, and a sheath covering the outside of the data transmission line and the power line. Each of the signal transmission cores and the power transmission cores includes a conductor and an insulation layer covering the conductor. A first shielding strip is wrapped around the outside of the cable core formed by twisting at least two signal transmission cores and at least two power transmission cores. A metal braided layer and a wrapping layer are sequentially arranged between the first shielding strip and the sheath layer. The sheath layer slidably covers the outside of the wrapping layer. A second shielding strip is wrapped around the outside of the data core formed by twisting at least two signal transmission cores and a current-carrying core. This utility model can improve the shielding capability and the range of signal shielding, and effectively avoid the wear and interference of the metal braided layer caused by the relative sliding between layers.

The invention relates to the technical field of steel plate processing, and discloses a petroleum pipeline thick-wall steel plate pre-bending and edge rolling all-in-one machine which comprises a machine base, a supporting edge rolling mechanism installed in the machine base and a steel plate sample arranged above the machine base and further comprises two side frames symmetrically arranged on the two sides of the machine base. A synchronous pre-bending mechanism is arranged at the top of the side frame; synchronous and symmetrical pre-bending of the two ends of a steel plate is achieved through the synchronous pre-bending mechanisms arranged on the two sides of the machine base, a lifting autorotation roller and a pitched roof rotating roller which are installed in a trapezoid frame can apply accurate and adjustable bending force to the two ends of the steel plate at the same time, and procedure interruption and reference deviation caused by turning around and secondary clamping in the traditional technology are eliminated; it is ensured that the curvature radius of pre-bending at the two ends is highly consistent with the forming quality, the overall roundness and straightness of the barrel are remarkably improved, and a fundamental guarantee is provided for subsequent efficient edge rolling and high-quality girth welding.

The utility model provides a kind of tubular object manufacturing device, the device of the utility model includes: the first slitting assembly of original strip material is divided into at least one wide strip and at least two narrow strips;The glue assembly of one strip surface of the wide strip or narrow strip is coated with glue;The glue coating surface of each wide strip is bonded with at least two adjacent narrow strips with the way that narrow strip is in the same plane through glue coating surface to be double-layer bonded strip bonding assembly;The second slitting assembly of double-layer bonded strip is divided into double-layer strip along the gap between adjacent narrow strips;Forming assembly is curled into continuous double-layer tubular object with the axis parallel to the conveying direction of double-layer strip.This utility model's device effectively improves tubular object roundness, hardness, reduces raw material consumption, and the two layers of double-layer tubular object are completely consistent, can reduce product difference rate, improve product quality, while multi-channel parallel forming can multiply production efficiency.

The application belongs to the technical field of nodular cast iron, and particularly relates to a novel nodular cast iron and a preparation method and application thereof. The novel nodular cast iron has the following element composition and mass percentage: C 3.75-3.90%, Si 2.00-2.20%, Mn≤0.10%, Mg 0.035-0.055%, RE≤0.008%, P≤0.02%, S≤0.01%, Cu 0.1-2.0%, Mo≤0.02%, Ni 1.0-2.0%, Sn≤0.05%, Ti≤0.01%, V≤0.02%, B≤0.0008%, Sb 0.003-0.007%, Cr≤0.05% and the balance of Fe; and is composed of 45-55% pearlite and 45-55% ferrite. By controlling the element content in the nodular cast iron and combining with an efficient preparation method, the nodular cast iron with a pearlite content of 45-55% and a spheroidization rate of greater than 95% is obtained, and the nodular cast iron exhibits high strength, high plasticity and a relatively high low-temperature impact value.

This invention discloses a high-compact, high-capacity lithium iron phosphate cathode material and its preparation method. Using iron phosphate and iron hydroxide as a mixed iron source, a two-step synthesis method is employed. First, the two raw materials are ground to one large particle size and one small particle size. The large particle size is sintered at two different temperatures to prepare large and medium particles, while the small particle size is sintered at two different temperatures to prepare small and ultra-small particles. Then, the large and medium particles are mixed and ground to a large particle size, and the small and ultra-small particles are mixed and ground to a small particle size. The mixing of large and small particle sizes increases the particle size distribution, and sintering yields the high-compact, high-capacity lithium iron phosphate cathode material. The mixing and grinding of multiple particles in this invention further increases the particle size distribution and improves the compaction density of the cathode material. The use of a low-molecular-weight carbon source in the first sintering stage is beneficial for particle coating and improves particle roundness. The use of a high-molecular-weight carbon source in the second sintering stage constructs a continuous conductive network, ensuring the material's capacity is fully realized.

This invention provides a method for preparing lithium iron phosphate from hydroxyferric phosphate and lithium iron phosphate electrode material. Ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution, and ammonia are added to the ferrous sulfate solution to form a mixed slurry. The mixed slurry is kept at room temperature for a period of time, then washed with water and filtered to form hydroxyferric phosphate precursors with different iron-phosphorus ratios. These precursors are then flash-dried and sintered at high temperature to obtain hydroxyferric phosphate precursors with different iron-phosphorus ratios and specific surface areas. The hydroxyferric phosphate precursors are pulverized and mixed to obtain the finished hydroxyferric phosphate product. High-iron-phosphorus ratio hydroxyferric phosphate and low-iron-phosphorus ratio hydroxyferric phosphate are mixed in a certain proportion and then formulated with lithium phosphate, lithium iron phosphate, and electrode material in a specific ratio, with the addition of a carbon source and additives to form a mixture. The mixture is then subjected to ball milling, sand milling, spray drying, sintering, pulverizing, sieving, batching, and packaging processes to obtain the finished lithium iron phosphate product.

The utility model relates to a kind of solid fish ball forming machine, including rack and be located on the rack auger mechanism, forming mechanism, cutter mechanism, power mechanism, shearing transmission mechanism, servo motor and servo controller, servo motor, shearing transmission mechanism and cutter mechanism are sequentially connected;Cutter mechanism includes tool rest assembly and two blades, each blade is provided with cutting hole, two described blade is arranged in upper and lower overlap and is embedded in tool rest assembly, shearing transmission mechanism includes an eccentric component, a linear pusher assembly and two rotating components, eccentric component is rotatably connected with the servo motor, linear pusher assembly front end is rotatably connected with eccentric component, rear end is fixedly connected with two rotating components, each rotating component is connected with one described blade, drives blade to reciprocate linear motion in tool rest assembly.The utility model has the advantages that the forming roundness of fish ball can be greatly improved, and the blade stroke error caused by the wear of the parts under high-frequency operation is overcome.

The application discloses a kind of storage devices for producing burst beads, and relates to the technical field of burst bead production equipment;The device includes a processing box with a box door, a detachable storage box is provided in the processing box;A feed pipe is fixed to the top of the processing box, a first distribution pipe and a second distribution pipe are connected to the sidewall of the feed pipe;A camera is provided on the inner bottom wall of the feed pipe, a first air pump is provided in the processing box, and the air outlet of the first air pump is connected to two groups of air blowing pipes facing the two distribution pipes, respectively, for blowing burst beads into the corresponding distribution pipe according to the particle size identified by the camera;A shaping wheel with a shaping groove is rotatably arranged in the distribution pipe, the shaping wheel is provided with an air storage cavity and is connected to a first air blowing pipe inclined to the inner wall of the pipe;The application integrates grading and sorting, roller pressing, multi-stage drying and storage into one, effectively solves the problems of incomplete dehumidification and insufficient roundness of burst bead accumulation, and realizes step-by-step reuse of air source, complete airtightness and low breakage, effectively improves the quality and production efficiency of burst bead storage.

The application provides a centerless grinding machine for surface treatment of alloy shaft workpieces, which comprises a centerless grinding machine body, a support frame, an equidistant moving device and a limiting mechanism, and relates to the alloy shaft machining technical field. The support frame and the equidistant moving device are matched and arranged on the feeding side of the centerless grinding machine body. The installation spacing of each group of guide units can be flexibly adjusted according to alloy shaft workpieces of different lengths, the machining requirements of workpieces of various specifications can be met, and through the mutual cooperation of the guide units, the transmission units and the driving units, the bidirectional movement of the alloy shaft workpiece self-rotation and axial advancement can be compatible on the basis of stable multi-point support and limiting of the alloy shaft workpiece, the workpiece stable feeding operation is realized, the problems of workpiece head warping, deviation and grinding vibration in the traditional machining process are effectively eliminated, the workpiece machining radial runout is greatly reduced, and the roundness, straightness and surface smoothness of the alloy shaft workpiece after machining are effectively improved.

The application provides a method for preparing lithium iron phosphate from iron hydroxyl phosphate and ferrous oxalate. The ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution and ammonia water are sequentially added to the solution to form a mixed slurry. The mixed slurry is heated and kept warm, and then washed with water and filtered under pressure to form an iron hydroxyl phosphate precursor with different iron and phosphorus ratios. The iron hydroxyl phosphate precursor is dried by flash evaporation and sintered at high temperature and then crushed to obtain an iron hydroxyl phosphate precursor with different iron and phosphorus ratios and different specific surface areas. The iron hydroxyl phosphate precursor is crushed and mixed to obtain an iron hydroxyl phosphate product. The high-iron and low-iron ratio iron hydroxyl phosphate is mixed with ferrous oxalate, lithium phosphate, lithium carbonate and ammonium dihydrogen phosphate in a certain proportion, and a carbon source and an additive are added to form a mixture. The mixture is subjected to a series of processes such as ball milling, sand milling, spray drying, sintering, crushing, screening, batching and packaging to obtain a lithium iron phosphate product.

The utility model relates to a cable, and specifically relates to a dynamic network Category 6 cable for a mechanical arm. The utility model aims to provide the dynamic network category 6 + cable for the mechanical arm, and the cable still has the advantages of low attenuation, high transmission rate and high-frequency support under the working condition of high-intensity movement, and has the characteristics of high flexibility, torsion resistance, tensile resistance and stable signal transmission. According to the technical scheme, the dynamic network Category 6 + cable for the mechanical arm is characterized by comprising a cable core, and an outer shielding layer, a belting layer and an outer protection layer which are sequentially coated outside the cable core from inside to outside, the cable core comprises a plurality of twisted pairs which are arranged in parallel along the length direction of the cable and are coated with inner shielding layers; the twisted pair wires adopt different twist pitches so as to reduce electromagnetic crosstalk between the twisted pair wires. The twisted pair wire comprises two twisted wires, and each wire comprises a conductor, and a first insulating layer, a second insulating layer and a third insulating layer which are sequentially coated on the conductor from inside to outside.

The invention belongs to the technical field of straight seam steel pipe machining, particularly relates to a straight seam steel pipe machining method, a straight seam steel pipe manufactured through the straight seam steel pipe machining method, a welding core and a welding flux, and aims to solve the problem of the forming quality of the two sides of a welding seam of the straight seam steel pipe. The processing method of the straight seam steel pipe is characterized by comprising the following steps: rolling for the first time; welding for the first time; rolling for the second time; and welding for the second time. According to the technical scheme, the problem of straight edges on the two sides of a welding seam can be effectively solved, welding seam angular distortion is reduced, and the roundness and straightness of a steel pipe are improved.

The application discloses a high-precision shaft pneumatic tool. The tool comprises a cylinder, a bottom plate, a base, a plurality of elastic clamps, a pressing plate, a pull core, a guide column, a guide sleeve and a plurality of axial positioning columns. The base is provided with a plurality of clamp mounting holes corresponding to the elastic clamps, and the pressing plate is provided with a pressing hole matched with the upper end of the elastic clamp. The cylinder drives the pressing plate to make axial reciprocating motion relative to the base through the pull core. The guide column and the guide sleeve limit the movement of the pressing plate along the axial direction. The axial positioning columns installed on the bottom plate are coaxially arranged with the elastic clamps. The air pressure regulating valve is arranged on the inlet circuit of the cylinder. When the pressing plate is moved towards the base by the pull core, the elastic clamp is radially contracted and self-centered to clamp the workpiece. Conversely, the elastic clamp is opened by its own elasticity to release the workpiece. The application can effectively reduce the clamping deformation and surface damage of small shaft parts, improve the radial run-out control ability, the repeat positioning accuracy, the multi-station machining consistency and the change efficiency.

The application discloses a precision polishing processing device for brass rod production and a processing method thereof, and relates to the brass rod polishing technical field.The device comprises a polishing unit, a supporting unit and a rotary feeding unit.Three groups of clamping and polishing mechanisms are uniformly distributed in the circumference of the polishing unit, and the clamping and polishing rollers are synchronously changed in diameter and are embraced and centered by a deflection arm driven by a hydraulic driving assembly.The driving mechanism drives the polishing rollers to rotate by gear transmission through a gear ring.The rotary feeding unit clamps the workpiece and feeds it in the reverse direction, and the supporting unit adjusts the flexible supporting wheel through a reciprocating screw rod, and the rear end polishing is completed by relying on the outer ring polishing cotton.The three-point embracing clamping is adopted, the workpiece is uniformly stressed, and the brass rod is prevented from being deformed and bruised under pressure.The hydraulic pressure control and diameter adjustment do not need to replace the guide sleeve, and the production change is convenient.The workpiece and the polishing roller rotate in opposite directions to realize uniform grinding around the circumference, and the flexible polishing at the tail is matched, so that the processing precision and the surface quality are effectively improved, and the continuous polishing of the multi-specification small-batch brass rod is adapted.

The application discloses a semi-solid thixotropic die casting forming method of a narrow solid-liquid two-phase zone alloy, and comprises the following steps: step one: the narrow solid-liquid two-phase zone alloy is added into a heating device and heated to a superheating temperature, and after complete melting, the alloy is cooled for a certain time to obtain an alloy blank with a cast structure; step two: the alloy blank is added into an extrusion device to complete cold extrusion, and an alloy blank containing high-density dislocations and lattice distortion structures is obtained; step three: the alloy blank is heated for the first time, the heating temperature is set between a recrystallization temperature and a solidus temperature of the alloy, and isothermal heat treatment is carried out to obtain fine and uniform recrystallized grains; step four: the alloy blank is heated for the second time, the temperature is set above the solidus temperature of the narrow solid-liquid two-phase zone alloy, and isothermal heat treatment is carried out to obtain a semi-solid blank; and step five: the semi-solid blank is subjected to die casting forming. The application has the advantages that excellent castings with physical properties are formed.

The invention provides a novel vermicular graphite cast iron material for a sand-coated iron mold and a processing method of the novel vermicular graphite cast iron material, and relates to the technical field of iron castings. The novel vermicular graphite cast iron material comprises the following components: 2.2%-2.8% of C, 4.5%-5.0% of Si, less than or equal to 0.5% of Mn, less than or equal to 0.05% of P, less than or equal to 0.015% of S, 0.3%-0.5% of Mo, 0.3%-0.5% of V, 0.2%-0.4% of Cr, 0.01%-0.03% of Bi, 80-120ppm of N and the balance of iron and inevitable impurities. According to the vermicular graphite cast iron material, 60-80% of vermicular graphite cast iron is contained, the balance is spheroidal graphite, flake graphite hardly exists, and the vermicular graphite cast iron material has good thermal fatigue resistance and high-temperature stability.

The application discloses a three-way catalyst reducer shaping tool composite die set, which comprises a fixed die seat, the upper end face of which is provided with a lower die seat in parallel, two symmetrically arranged side die frames, which are symmetrically fixed on the fixed die seat and located on the two sides of the lower die seat, an upper stamping seat arranged above the fixed die seat, a first forming die set and a second forming die set, each of which is composed of two model plates arranged in an up-down mode, a die closing mechanism arranged below the lower die seat, and a plurality of reducer units, each of which is arranged at two reducer shaping ports of the first forming die set and the second forming die set. The double die set design of the application combines pre-reducing with accurate reducing, step-by-step forming is realized, size out-of-control caused by single large deformation is avoided, and a micro dynamic spinning shaping force is applied to the inside of the shell, so that the rebound is significantly reduced and the size stability after reducing is ensured.

The application discloses a kind of connector pin jack automatic punching milling flat device, it is related to connector parts processing equipment field.The device includes the rotating disc that can rotate 360 degrees, rotating disc outer periphery is equipped with multiple clamps, around rotating disc is equipped with seven process execution mechanisms of feeding, pushing, detection, dotting, drilling, milling flat slot, discharging, equipment can realize copper needle single intermittent orderly feeding by relying on vibration disc and copper needle feeding mechanism, pushing mechanism completes workpiece accurate positioning, detection mechanism can judge whether copper needle is clamped in place, mark the clamp of this timing if detection fails, directly skip processing flow when passing subsequent process execution mechanism, discharging mechanism can automatically distinguish good product and defective product and classify discharge.The device of the application integrates multiple processes, can realize the full-process automatic processing of copper needle, solves the problems of low processing efficiency, poor precision, high labor cost and other problems existing in traditional process, equipment runs stably, has strong versatility, is suitable for large-scale precision machining of connector pin.

This invention provides a method for manufacturing a compressor piston. The compressor piston includes a hinge hole and a snap-fit ​​position with a width smaller than the hinge hole. The hinge hole is used to connect a transmission component to achieve eccentric rotation of the compressor piston and crankshaft, thereby compressing air. The manufacturing method includes: preparing a piston body; milling the piston body to form an initial groove on the outer wall of the piston body; the initial groove penetrating both end faces of the piston body; using a broach to enlarge the end of the initial groove away from the outer wall to form the hinge hole; the diameter of the hinge hole is larger than the width of the initial groove; and surface treating the piston body to obtain the compressor piston. This invention solves the problem of low processing efficiency caused by the need for repeated rough and fine grinding of the piston hinge surface to achieve higher precision.

The present application relates to the field of pipe shaping equipment, in particular to a pipe ball passing shaping equipment, which comprises a workbench, a die frame and a shaping ball driving mechanism arranged on the workbench, an upper die is arranged on the die frame, a first driving element is arranged to drive the upper die to move up and down, a lower die is arranged below the upper die, the upper die and the lower die are combined to form a shaping cavity, the pipe is placed in the shaping cavity, a first limiting mechanism is arranged on one side of the lower die, a guide die is arranged on the other side of the lower die, a shaping ball is arranged in the guide cavity, the shaping ball driving mechanism comprises a top rod and a second driving element arranged to drive the top rod to move, a guide assembly is connected to the end of the top rod, and the second driving element drives the top rod to drive the guide assembly to push the shaping ball to pass through the inner cavity of the pipe. The pipe ball passing shaping equipment is suitable for shaping pipes of various specifications, can improve the roundness of the inner holes of pipes of different specifications, and ensures the consistency of the shaping effect of pipes of the same batch of specifications.

The application provides a single-crystal nickel-cobalt-manganese positive electrode material, a preparation method, a positive electrode sheet and a lithium ion battery. The preparation method comprises the following steps: mixing a nickel-cobalt-manganese precursor, a lithium source and a first additive, first sintering to obtain a first sintered material; mixing the first sintered material and a second additive, second sintering to obtain a second sintered material; mixing the second sintered material and a third additive, third sintering to obtain the single-crystal nickel-cobalt-manganese positive electrode material; the half-peak width a of the (001) crystal face of the nickel-cobalt-manganese precursor and the half-peak width b of the (100) crystal face satisfy the following conditions: 0.30 <= a <= 0.48, 0.38 <= b <= 0.52, and 1.1 <= b / a <= 1.5. The roundness of the single-crystal nickel-cobalt-manganese positive electrode material and the half-peak width of the nickel-cobalt-manganese precursor are combined and quantified, the nickel-cobalt-manganese precursor is screened, and the single-crystal nickel-cobalt-manganese positive electrode material with high roundness and stable structure is prepared by combining the three sintering systems.

The invention relates to the technical field of biological bacterial fertilizers, and discloses a biological bacterial fertilizer capable of promoting growth and development of crop root systems, and the biological bacterial fertilizer is prepared from brown sugar yeast activation liquid, calcium lignosulphonate, chitosan oligosaccharide, sodium polyaspartate, superfine calcium silicate, a decomposed organic fertilizer and a variety of microbial powder. The preparation process adopts a liquid phase shielding and solid phase isolation strategy: in a liquid phase, calcium lignosulphonate is used for wrapping chitosan oligosaccharide to prevent flocculation; and sodium polyaspartate and superfine calcium silicate are premixed in the solid phase. During granulation, the acid liquid phase excites the superfine calcium silicate to generate interface micro-etching to release calcium ions. Sodium polyaspartate is isolated in a solid-phase matrix, so that after the fertilizer is buried into soil, an instantaneous flocculation phenomenon caused by direct contact between chitosan oligosaccharide with positive charges in a liquid phase and sodium polyaspartate with negative charges in a solid phase can be avoided, and the process bottleneck that a zwitterionic polymer mixed system is difficult to granulate is solved; the continuity of the granulation process is ensured; and the roundness of finished granules is improved.

This invention discloses a large-arc bend injection mold and molding method, belonging to the field of injection molding technology. The mold includes a moving mold, a fixed mold, and a core mold with a circular arc core; it also includes a demolding drive mechanism for driving the core mold and product to generate a first displacement away from the fixed mold; and a pointer-type rotary demolding mechanism, which includes a pointer push rod and a push ring rotating around the axis of the circular arc core. During demolding, after the product is lifted with the core mold, the pointer push rod drives the push ring to swing along the circular arc path to push the product out. This invention also reduces the covering force by performing pre-demolding through an assisted demolding mechanism and ensures the stability of the core mold during injection molding using a core positioning mechanism. This invention replaces the traditional hot bending process with one-time injection molding, solving the problems of low production efficiency, poor roundness, and easy cracking caused by thermal stress in existing technologies for large-arc bend pipes, significantly improving the geometric accuracy and operational reliability of the product, and is particularly suitable for ultra-high voltage converter valve cooling system pipelines.

The application belongs to the technical field of biological fermentation, and relates to a bacillus licheniformis SXZY-02 and application thereof, and comprises the following steps: a bacillus licheniformis (Bacillus licheniformis) SXZY-02 is separated from the surface of tobacco leaves, Lysinibacillus macroides ) and the strain preservation number is CCTCC NO:M 2025152; the bacillus licheniformis SXZY-02 is fermented to obtain a biological agent containing the bacillus licheniformis SXZY-02, and after fermentation optimization, the lipase activity is 8.99 U / mL; the biological agent containing the bacillus licheniformis SXZY-02 is applied to tobacco shred fermentation, fat is decomposed into free fatty acid, tobacco aroma quality and alcohol degree are effectively improved, and irritation is reduced. The technology provides a green and environment-friendly solution for tobacco quality upgrading, and meets the high-quality development direction of the industry.

The invention discloses a tank body machining device which comprises a workbench, a supporting shaft is installed in the workbench through a bearing, a supporting tray is fixedly connected to the upper end of the supporting shaft, a tank body is placed at the upper end of the supporting tray, and a self-adaptive shaping mechanism is arranged on the workbench. A self-adaptive shaping mechanism is arranged on the workbench, a self-adaptive pressing roller is arranged on the self-adaptive shaping mechanism, the self-adaptive pressing roller is in contact with the tank body, a support is fixedly connected to the upper end of the workbench, a rotary trimming mechanism is arranged on the support, a pressing plate is arranged on the rotary trimming mechanism, and the pressing plate is in contact with the tank body. The invention relates to a tank body processing device which has the characteristics that a tank body is convenient to shape to ensure the roundness and burrs on the edge of the upper end of the tank body are convenient to remove.

This utility model relates to the field of water-guided laser technology, specifically to a water-guided laser coupling head and a water-guided laser cutting head. The water-guided laser coupling head includes a mounting base, a transparent lens, and a coupling module. The mounting base is hollow, and the transparent lens and coupling module are housed within it, with the coupling module located below the transparent lens. The transparent lens and coupling module are spaced apart to form a water flow homogenization cavity. The water flow homogenization cavity includes a squeezing cavity and a slowing cavity. The squeezing cavity is located on the periphery of the slowing cavity, and its outer edge gradually narrows towards the center of the water flow homogenization cavity, smoothly transitioning to the slowing cavity. The coupling module contains a nozzle positioned opposite the slowing cavity, and water flows from the squeezing cavity to the slowing cavity and then to the nozzle. This application improves the structure of the water flow homogenization cavity, balancing the pressure of the high-pressure water entering the cavity, resulting in more stable water flow and thus better roundness of the water column entering the coupling hole, which is beneficial for improving subsequent processing effects.