2313 results about "Metal powder" patented technology

The invention provides a high-precision laser additive manufacturing method and device based on metal powder melting, and relates to the technical field of metal additive manufacturing, and the high-precision laser additive manufacturing device comprises a multi-element powder supply and electrification unit which is used for carrying out independent metering supply and airflow dispersion mixing on various metal powder in an inert atmosphere environment and enabling powder particles to obtain controllable charges; the electromagnetic field cooperative control unit is used for actively regulating and controlling the falling speed and the transverse track of the powder particles through the cooperative effect of a longitudinal magnetic field and a transverse electric field when the powder particles are in a charged state; the invention provides a metal powder forming technology path based on particle size active conveying and spatial positioning, and active conveying and accurate positioning of the metal powder particles in the flying process are realized by performing electrified regulation and control on single or small-scale metal powder particles and utilizing the action of an electromagnetic field. Therefore, layer-by-layer stacking forming is completed under the condition of not depending on the whole powder laying layer.

The invention discloses a multi-component composite oxide dispersion strengthening molybdenum alloy and a preparation method thereof, and relates to the technical field of refractory metal powder metallurgy preparation. The molybdenum alloy comprises a molybdenum matrix and a Y-X-O composite oxide nano precipitated phase dispersed and distributed in the molybdenum matrix. The molybdenum alloy comprises the following components in percentage by mass: 1%-2% of Y2O3, 0.3%-1.2% of an active element X, 96.5%-98.7% of molybdenum and inevitable impurities, wherein X is selected from one of Ti, Zr and Hf; the Y-X-O composite oxide nano precipitated phase and the molybdenum matrix form a coherent or semi-coherent interface, and the interface mismatch degree is less than or equal to 5%. The molybdenum alloy has excellent high-temperature strength and creep resistance, and can be applied to the high-temperature fields of nuclear industry, aerospace and the like.

The invention belongs to the technical field of cable processing, and relates to a preparation method and application of a flexible superconducting coaxial cable outer conductor. The preparation method comprises the following steps: mixing Nb powder and Ti powder by adopting a vibrating ball mill to prepare NbTi composite powder; a substrate of laser powder bed melting equipment is preheated, the NbTi composite powder is spread on the substrate of the laser powder bed melting equipment, a melting powder layer is scanned through the laser powder bed melting technology, a three-dimensional communicated grid structure is formed through interlayer staggered scanning, finally, the NbTi net-shaped alloy pipe is placed in a strong acid solution to be soaked for a short time, redundant metal powder is removed, and the NbTi net-shaped alloy pipe is obtained. And finally, the preparation of the flexible superconducting coaxial cable outer conductor for the quantum computer is realized.

The invention relates to the technical field of metal powder processing, and discloses a high-performance dissimilar metal powder precision forming process which comprises the following steps: filling powder into a mold cavity, applying vibration disturbance, monitoring the change rate of a phase lag angle, judging that the powder is dense when the change rate is lower than an offset threshold value, outputting a pressing mode switching signal, an induction heating device is used for applying transient thermal load to induce cracks of an oxide film on the surfaces of particles, the pressure load is applied, the side wall is adjusted to generate shear displacement to peel off the oxide film, and metallurgical bonding is achieved through fresh metal surface contact. An interface is activated through thermal expansion mismatch and mechanical friction synergistically, a high-density uniform green body is obtained at low temperature, generation of brittle intermetallic compounds is inhibited, and the fatigue resistance of a formed part is enhanced.

The invention relates to the technical field of metal powder manufacturing products, in particular to an automatic ring part production line and a process control method.Bar heating furnaces of the production line are arranged on the inner side and the outer side of a guide rail in two rows and multiple sets, a transfer manipulator is arranged on the guide rail, a ring forging press machine is arranged at the front end of the guide rail, and a movable workbench is arranged at the ring forging press machine; the ring rolling machine is arranged in front of the ring forging press machine, the center line of the ring rolling machine and the center line of the ring forging press machine are obliquely arranged, a carrying mechanical arm is arranged between the ring rolling machine and the ring forging press machine, the conveying roller way is arranged in front of the ring rolling machine, and the center line of the conveying roller way and the center line of the ring rolling machine are obliquely arranged. The center line of the conveying roller way is parallel to the center line of the ring forging press, and the swing manipulator is arranged in an included angle formed by the ring rolling machine and the conveying roller way. According to the production line and the control method, the production process is optimized, the production efficiency is improved, and the production cost is reduced.

The present application relates to a kind of method and device for judging the trend of concrete oblique crack tip, fill metal powder in the crack to be measured;Determine the beginning and end point of crack trend according to the opening trend of crack surface to be measured, draw the center line of the connecting line of beginning and end point as the first measuring line, respectively from the two end points of the first measuring line along the first measuring line to crack opening position detection using electromagnetic wave radar detector, record the position and depth of the first fluctuation point on radar development map;With the first measuring line as reference line, rotate to make several new measuring lines, obtain the position and depth of the first fluctuation point of each new measuring line;Fluctuation point is sorted according to measuring line sequence, draw the connecting line diagram, i.e. the trend curve of oblique crack tip.The present application is based on the essential characteristics such as the height and form of oblique crack tip position, combined with the measurement mode from far to near, multi-angle, multiple measuring points and the reflection law of radar wave by metal powder, the position and depth of multiple points of concrete oblique crack tip are measured, and then the trend of crack tip is effectively judged.

The invention belongs to the technical field of TG-DSC testing of metal powder materials, and particularly relates to an anti-oxidation high-precision TG-DSC testing method of high-temperature alloy powder, which comprises the following steps: placing the high-temperature alloy powder in a furnace body of a TG-DSC instrument, carrying out high-purity argon replacement on the atmosphere in the furnace body by taking high-purity argon as furnace body purging gas, and carrying out high-purity argon replacement on the atmosphere in the furnace body; the initial oxygen content in the furnace body is reduced to 0.1 ppm or below; continuously introducing hydrogen-argon mixed gas as flowing gas into the furnace body, controlling the temperature of the furnace body to be increased to a target temperature, and ending the test to obtain a TG curve and a DSC curve of the to-be-tested high-temperature alloy powder; according to the invention, through physical cleaning of oxygen in the furnace body by circulating vacuumizing before testing and chemical cleaning of oxygen permeating into the furnace body by hydrogen-argon mixed gas in the whole process in the testing process, a dual anti-oxidation barrier is constructed, so that oxidation weight increment and oxidation heat release interference of a powder sample are eliminated fundamentally; therefore, the real mass change and the heat flow signal change of the alloy powder sample in the temperature programming process can be accurately measured.

The invention discloses a powder metallurgy pressing die, and belongs to the technical field of powder metallurgy, the powder metallurgy pressing die comprises a base, a plurality of supporting rods are fixedly mounted at the upper end of the base, the bottoms of the supporting rods are in threaded connection with lock catch sleeves, and an upper die assembly is mounted among the tops of the supporting rods; a filling assembly is installed on the lower die assembly, the filling assembly can implement a filling function on the die, a recycling assembly is installed on the filling assembly, the recycling assembly can execute a recycling function on crushed aggregates left on the surface of the lower die assembly, and two fixing plates are fixedly connected to the rear end of the upper die assembly. Through the dual effects of brush cleaning and negative pressure adsorption, residual crushed materials on the surface of the lower die plate can be comprehensively collected, conveyed to the material return groove of the hopper through the material return pipe and re-fed to be circularly used for the follow-up filling procedure, the utilization rate of metal powder is greatly increased, the machine does not need to be stopped for cleaning the residual materials, production continuity is guaranteed, and efficiency is improved.

The invention relates to superfine molybdenum powder and a converter reduction preparation method thereof, belongs to the technical field of rare metal powder metallurgy, and solves the problems that the existing molybdenum powder preparation process is easy to cause hardening and agglomeration, the appearance granularity of the molybdenum powder cannot be controlled, the reduction process is complicated, the efficiency is low, the energy consumption is high and the cost is high. The method comprises the following steps: (1) preparing molybdenum oxide powder; (2) adding the molybdenum oxide into a converter, and introducing hydrogen for reduction; wherein the molybdenum oxide powder is nanoscale molybdenum oxide. The contact area between the adopted nanoscale molybdenum oxide powder raw material and the reducing gas is large, the converter rotates to drive the raw material powder to flow, full contact between the raw material powder and the reducing gas is promoted, hardening and agglomeration are inhibited, the reduction efficiency is improved, one-step reduction is achieved, the morphology is easy to control, and no waste gas is generated; compared with a traditional static pusher furnace, the closed dynamic converter has the advantages that reduction hydrogen escape is greatly reduced, safety is improved, energy consumption is reduced, and the use amount of hydrogen is greatly reduced.

The invention discloses a preparation method of ODS alloy composite powder for laser additive manufacturing. The invention belongs to the technical field of metal additive manufacturing materials, and particularly relates to a preparation method of oxide dispersion strengthening (ODS) alloy composite powder for laser additive manufacturing. The metal matrix powder is divided into two particle size intervals by taking 30 [mu] m as a particle size critical point, the metal matrix powder in the two particle size intervals is mixed with the nano oxide powder through differential acoustic resonance to form two kinds of composite powder, and the ODS alloy composite powder is obtained by mixing the two kinds of composite powder. According to the method, different high-energy acoustic resonance mixing time is adopted for coating characteristic differences caused by different masses of metal powder (smaller than or equal to 30 microns and gt; 30 microns) in different particle size intervals. And finally, the thicknesses of nano oxide coating layers of all the powder are accurately controlled to be 500 nm or below, and the risks of nano oxide agglomeration and large-size slag formation in the SLM process are remarkably reduced.

The invention discloses a method and device for optimizing metal powder laying additive manufacturing, the method comprises the steps that optical fiber beam combination is conducted on short pulse optical fiber laser and continuous optical fiber laser which are the same in wavelength to form a composite light source, and the pulse width of the short pulse optical fiber laser is the nanosecond level or the subnanosecond level; the composite light source is output to the galvanometer module through the beam combining optical fiber and then acts on the metal powder bed, and the low-cost and high-efficiency method of full coaxiality and concentricity of lasers of different light sources through the beam combining optical fiber is adopted, so that the printing stability, reliability and large-area uniformity are guaranteed; the short pulse laser and the continuous laser act on an irradiation metal area synchronously and coaxially all the time in the scanning process, metal powder bed melting manufacturing under the force oscillation effect is achieved, and the stability of a keyhole in the additive manufacturing process is improved. According to the method, the pore forming probability of laser powder laying sintering three-dimensional forming can be greatly reduced, the comprehensive mechanical property of a printed piece is improved, and wide popularization and application prospects are achieved.

The invention relates to the technical field of metal injection molding, and discloses a process for preparing an ultrahigh-toughness MIM part through integration of multistage degreasing and gradient sintering, and the process comprises the following steps: metal powder and a binder are mixed in proportion, and uniform feed is obtained after banburying and granulation; injection-molding the feedstock into a green body; the green body is sequentially subjected to catalytic degreasing and stepped thermal degreasing, the catalytic degreasing is carried out in a nitric acid-containing atmosphere, and the thermal degreasing is carried out in a multi-stage heating procedure under the protection of inert gas; and carrying out multi-stage gradient sintering on the degreased green body in a vacuum or inert atmosphere, wherein the multi-stage gradient sintering comprises low-temperature pre-sintering, medium-temperature deoxidization and decarbonization and high-temperature densification sintering. According to the invention, through organic combination of multi-stage catalytic degreasing and stepped thermal degreasing, efficient and thorough removal of the binder is realized, carbon residues, bubbles and internal defects caused by incomplete degreasing are effectively avoided, and the quality of the green body and the structural integrity before sintering are improved.

The invention relates to a metal powder compact automatic production system which comprises a feeding device, a powder filling device, a compacting device, a plug sealing device, pressing equipment and a transfer device, the feeding device is used for conveying metal powder to the powder filling device, the powder filling device is used for metering and filling the metal powder into a mold, and the compacting device is used for compacting the metal powder. The compacting device is used for conducting vibration compacting treatment on metal powder in the mold, and the sealing and plugging device is used for conducting sealing and plugging treatment on the mold after filling is completed. The transfer device is used for transferring the mold; and the pressing equipment is used for pressing the strip die to obtain a metal powder compact. According to the automatic production system for the metal powder pressed blank, automatic feeding, metering and charging, vibration compacting, pressing and plug sealing treatment can be achieved, the production efficiency of the metal powder pressed blank can be greatly improved, and it can be guaranteed that the quality of the produced blank is stable.

The invention provides a preparation method of a metal-based ceramic composite membrane with a catalytic ozone function. The preparation method comprises the following steps: preparing functional powder by taking tetrabutyl titanate as a titanium source and silver nitrate or ferric nitrate as a catalytic active metal source and adopting a sol-gel method; a porous metal pipe is used as a supporting body, metal powder and functional powder which are made of the same material as the supporting body are mixed to prepare functional slurry, the functional slurry is evenly deposited on the inner wall of the supporting body through vacuum filtration, and powder particles which are not firmly combined are removed through back flushing; and finally, the binding force between the functional film layer and the metal matrix is improved through high-temperature heat treatment. Wherein the thermal expansion coefficient difference between the metal supporting body and the functional film layer can be reduced by adding the metal powder, the metal powder is melted and diffused in the high-temperature heat treatment stage, and metallurgical bonding is formed between the functional powder and the metal substrate. The method is simple in process, and the prepared metal-based ceramic composite membrane has the advantages of being high in membrane layer binding force, not prone to falling off, high in catalytic activity, high in anti-pollution capacity, stable in operation and the like.

The invention provides a Y-rich rare earth permanent magnet and a preparation method and a magnetic performance improving method thereof, and the performance improving method comprises the steps: uniformly mixing to-be-diffused metal powder containing Dy and / or Tb elements with an organic solvent to obtain to-be-diffused alloy liquid; the alloy liquid to be diffused is attached to the surface of the Y-rich rare earth permanent magnet, and the Y-rich rare earth permanent magnet is placed in a vacuum sintering furnace; the Y-rich rare earth permanent magnet is subjected to grain boundary diffusion heat treatment through the vacuum sintering furnace, so that Dy and / or Tb elements are diffused into the surface layer of a main phase lattice of the Y-rich rare earth permanent magnet; and carrying out tempering treatment on the Y-rich rare earth permanent magnet. The problems that the coercive force of an existing Y-containing magnet is difficult to effectively improve, and residual magnetism is easily reduced can be effectively solved.

The invention discloses a porous high-entropy alloy structure layer for strengthening aluminum / steel heterogeneous interface connection and a selective laser melting forming method of the porous high-entropy alloy structure layer, and belongs to the field of high-entropy alloy materials. The porous high-entropy alloy structure layer comprises FeCoCrNiMn high-entropy alloy and is of a single cubic array stacking structure formed through selective laser melting. The selective laser melting forming method comprises the steps that a porous cubic structure model is designed through Majics three-dimensional software and guided into selective laser melting manufacturing equipment, a metal powder rapid forming system is started, FeCoCrNiMn high-entropy alloy powder is subjected to selective laser melting forming, and the high-strength and high-toughness high-entropy alloy coating is obtained. By effectively controlling the laser power and the three-dimensional model parameters, free energy of an alloy system is effectively reduced, formation of intermetallic compounds is inhibited, the mechanical property of aluminum / steel dissimilar metal connection is improved, and the method has wide application prospects in the aspect of aluminum / steel dissimilar metal connection.

The invention belongs to the technical field of metal powder parts and powder metallurgy, and provides a preparation method of an aluminum alloy battery case, which specifically comprises the following steps: firstly, arranging a bypass sampling branch at the tail gas end of a de-lubrication furnace, configuring a carbon dioxide analyzer in the branch, and when low-temperature desorption begins, monitoring the emission value of tail gas carbon dioxide in real time through the carbon dioxide analyzer; then, a temperature range saturation model is built through the emission value to obtain a temperature range saturation index, and finally, the temperature rising process is dynamically adjusted according to the temperature range saturation index. The risk of local high pressure and closed hole enrichment caused by the fact that the pyrolysis rate is not matched with the rate of gas expansion and the rate of pore communication capacity in the heating process of a fixed temperature range method is effectively moved forward into a control event of pre-judgment recognition and suppression, and the control precision and stability of the de-lubrication-to-sintering integrated process are improved. And a solution with higher engineering feasibility is provided for high-yield, low-repair and reusable import of the aluminum alloy battery shell for the new energy automobile.

To provide an information leakage prevention device capable of making information in a hard disk unusable and preventing information leakage from the hard disk. [Solution] The information leakage prevention device 1 comprises a holder 14, a base body, and a holder arranged so as to contact the top surface of a hard disk, the holder having a first explosive loading section formed so as to penetrate from the bottom to the top inside the holder, a cover section, and an ignition device 22 having a heating section, a first type explosive layer 84 arranged within the first explosive loading section, in which the average particle size of metal powder particles is a first average particle size, and a second type explosive layer 86 arranged in contact with the first type explosive layer within the first explosive loading section, in which the average particle size of metal powder particles 82 is a second average particle size larger than the first average particle size, the first type explosive layer 84 being arranged closer to the hard disk than the second type explosive layer 86, and the first type explosive layer being arranged so as to contact the heating section of the ignition device.

This invention belongs to the field of catalytic material preparation technology, specifically relating to a method for preparing high specific surface area pure phase α-type molybdenum carbide by hydrogen intercalation modification of MoO3 and its application, including the following steps: (1) adding MoO3 powder to hydrochloric acid and dispersing it to prepare a mixture of MoO3 and hydrochloric acid; (2) adding metal powder to the mixture in step (1) and performing pre-reduction treatment by in-situ hydrogenation of the metal and hydrochloric acid to prepare H x MoO3 precursor; (3) H prepared in step (2) x The MoO3 precursor is carbonized under a carbon source gas to obtain a pure α-type molybdenum carbide with a high specific surface area. This method is simple and effective, avoids the use of corrosive NH3 gas during carbonization, and does not require a metal as a medium, thus solving the current problem of not being able to prepare metal-free modified pure α-MoC in one step.

The invention discloses a powder metallurgy gear pressing forming device, and belongs to the technical field of metal powder forming, the powder metallurgy gear pressing forming device comprises a supporting mechanism, and a working platform used for forming machining is fixedly installed in the middle of the supporting mechanism; a first supporting frame is further arranged below the working platform, and a pressing forming mold is installed between the working platform and the first supporting frame. A second supporting frame is fixedly connected to one side of the working platform, an automatic filling mechanism is installed between the working platform and the second supporting frame, and a vibration tamping mechanism is further installed on the automatic filling mechanism; and an extrusion forming mechanism is mounted at the top of the supporting mechanism. By designing the automatic filling mechanism and the vibration filling mechanism, filling, vibration filling and material supplementing work of the forming mold can be rapidly completed, so that the situation that a local cavity appears in metal powder is effectively avoided, and the overall machining quality of a formed gear is guaranteed.

The utility model discloses an efficient recycling and reusing device for metal 3D printing powder. The efficient recycling and reusing device comprises a base, a collecting cavity, a screening cavity, a drying cavity, a storage cavity, a conveying mechanism, a control system and an automatic screening device. The collecting cavity is located at the top of the base and used for receiving powder generated in the metal D printing process. The screening chamber communicates with the collecting chamber and is used for preliminarily screening the collected powder; the drying chamber communicates with the screening chamber and is used for drying the screened powder; the storage chamber is located below the drying chamber and used for storing the dried powder; the conveying mechanism penetrates through the cavities and is used for automatically conveying the powder; the control system is located in the base; the automatic screening device is located in the screening cavity. The functions of collecting, screening, drying, storing and the like are integrated, and efficient recovery and reutilization of metal powder are achieved; and the conveying mechanism achieves automatic conveying of the powder, and the recovery efficiency is improved.

The invention relates to the technical field of metal powder preparation, and discloses a high-zinc alloy powder preparation method and system.The method comprises the steps of raw material pretreatment and vacuum deep degassing, vacuum melting and active degassing, flow stabilization and diversion and gas-liquid synergistic atomization, solidification and collection under the protective atmosphere, and aftertreatment and packaging under the oxygen-free environment; the system is composed of a vacuum deep degassing unit, a vacuum melting and active degassing unit, a gas-liquid collaborative atomization unit, a powder collecting and cooling unit and an anaerobic operation and packaging unit. The high-quality zinc alloy powder which is low in oxygen content, high in sphericity degree and uniform in component can be stably prepared, and the method is suitable for being applied to the fields of additive manufacturing and thermal spraying.

A metal powder having a composition including the following elements, expressed in content by weight: 6.5%≤Si≤10%, 4.5%≤Nb≤10%, 0.2%≤B≤2.0%, 0.2%≤Cu≤2.0%, C≤2% and optionally containing Ni≤10 wt % and / or Co≤10 wt % and / or Cr≤7 wt % and / or Zr as a substitute for any part of Nb on a one-to-one basis and / or Mo as a substitute for any part of Nb on a one-to-one basis and / or P as a substitute for any part of Si on a one-to-one basis, the balance being Fe and unavoidable impurities resulting from the elaboration, the metal powder having a microstructure including at least 5% in area fraction of an amorphous phase, the balance being made of crystalline ferritic phases with a grain size below 20 μm and possible precipitates, the metal powder having a mean sphericity SPHT of at least 0.80.

The invention discloses a metal powder metallurgy forming process, and belongs to the technical field of metal powder metallurgy. The process comprises the following steps: preparing a metal mixture containing tungsten, copper, nickel, iron and an interface toughening agent according to a specific proportion, adding a polyvinyl alcohol aqueous solution, and uniformly stirring; carrying out compression molding on the mixture to obtain a green body; performing high-temperature sintering steps such as pre-sintering, sintering and cooling to obtain a sintered blank; and finally shaping to obtain a finished product. Compared with the prior art, the fracture toughness and elongation performance of the material are remarkably improved, innovative breakthrough is brought to a metal powder metallurgy forming process, and the method can be widely applied to the fields of aerospace, automobile manufacturing and the like to meet the requirements for high-performance metal parts.

The invention belongs to the technical field of metal powder preparation, and particularly relates to a preparation method of copper powder. According to the method, the pH value of a reduction reaction system is precisely regulated and controlled to be within the range of 5.38-9.38, the dispersing agent is reasonably added in stages before and after pH regulation, and the copper powder with the small average particle size and the low variable coefficient is successfully prepared. From the perspective of the process principle, the accurate regulation and control of the pH value can influence the crystal growth kinetics of copper hydroxide by adjusting the proton concentration, and directionally induce the copper hydroxide to form a target crystal form with a regular structure and uniform morphology, thereby laying a foundation for uniform nucleation and growth of copper atoms in the subsequent reduction reaction; by adding the dispersing agent in stages, the steric hindrance effect and the interface adsorption effect of the dispersing agent can be synergistically exerted, copper hydroxide particles are effectively inhibited from being agglomerated in the early stage, copper particles are prevented from being agglomerated due to too high local concentration in the reduction process in the later stage, and the consistency of the particle size is further guaranteed.

The invention provides a preparation method of silver-coated copper powder, and belongs to the technical field of metal powder treatment. The used copper particle suspension contains a complexing agent, so that the activity of the copper particles can be reduced, the reaction rate of reduction coating can be reduced when a silver-ammonia complexing solution is added, and a compact silver layer slowly and uniformly grows on the surface of each copper particle; the reduction of the activity of the copper particles slows down the replacement reaction of silver ions and copper, and the situation that the coating surface is rough and loose due to the generation of overlarge silver particles is avoided; the silver grows slowly and compactly, so that the surface of the coated silver layer is smooth and compact on the basis of lower usage amount of the silver source; the preparation method is simple in process, low in silver content and low in production cost, and the coated silver layer is smooth and compact in surface.

The invention discloses a three-dimensional wet grinding machine and method based on metal powder machining, and relates to the technical field of wet grinding machines, the three-dimensional wet grinding machine comprises a rack, a wet grinding tank is arranged at the top of the rack, two material ports are formed in the outer side of the wet grinding tank, the two connecting frames are both fixedly connected to the outer side of the wet grinding tank, and the two material ports are arranged in the wet grinding tank. The two connecting frames are rotationally connected with the rack, and a transmission device used for driving the connecting frames to rotate is arranged in the rack. After wet grinding is completed, powder slurry is discharged, then the traction piece drives the driving mechanism to ascend, a medium is forced to continuously penetrate through the driving mechanism, abraded grinding balls in the medium are discharged in batches through the screening piece, the abraded grinding balls in the wet grinding tank can be automatically screened out, and it is avoided that a large number of grinding balls need to be discharged; and after discharging, screening treatment is carried out, and the discharged materials are supplemented.

The utility model provides anti-oxidation treatment equipment for metal powder. The anti-oxidation treatment equipment comprises an anti-oxidation tank body, the device is characterized in that one side of the top of the anti-oxidation tank body is connected with a feeding pipe in a penetrating manner, air inlet pipes are arranged on the left side and the right side of the feeding pipe respectively, a driving motor is mounted in the middle of the top of the anti-oxidation tank body, the output end of the driving motor is connected with a stirring shaft, and a plurality of stirring paddles are uniformly distributed on the periphery of the stirring shaft; by arranging the humidity sensor, the humidity in the tank body can be monitored, when the tank body is affected with damp, the humidity sensor senses and transmits a signal to the controller, so that the controller controls starting of the heating pipe and the driving motor, and drying is accelerated through stirring of the stirring paddle.

The invention relates to an automatic filling rubber sheath preforming method and device for rare refractory metal powder. The device comprises a vacuum feeding mechanism, a weighing and metering mechanism, a vibration filling mechanism, an automatic plugging mechanism, a sheath transposition mechanism, a manipulator loading and unloading mechanism and a control system. According to the system, efficient, uniform and sealed filling of tantalum powder is achieved through vacuum material suction, weighing control, filling and compaction at the same time, automatic plugging and sealing and bag sleeve replacement through linkage of a mechanical arm. The control system coordinates sequential operation of all links on the basis of signals of multiple sensors, the powder amount range of a single bag is 6-17 kg, and the control system is matched with rubber bags of multiple specifications such as phi 60 * 1000 mm and the like. According to the method, the powder loading density consistency, the sealing reliability and the production line rhythm are improved, the labor intensity and the dust pollution are remarkably reduced, and the method is suitable for the field of metallurgy preforming of tantalum, alloy powder of tantalum and other metals.

The present application relates to optical fiber surface coating treatment device technical field, especially to a kind of optical fiber metal coating spraying device, including the spraying mechanism of lower shell, shunt chamber, combustion chamber and ring spray component composition, and for driving the linear drive mechanism and rotary drive mechanism of rotary movement of spraying mechanism.The present application is by being provided with independent oxygen passage, hydrogen passage and metal powder passage in shunt chamber, and by corresponding oxygen hole, hydrogen hole and metal powder hole spray into combustion chamber, it is realized in the state that oxygen content is higher, to metal powder realizes rapid melting, improves the purity of metal molten liquid;And by the ring array side nozzle on annular jet pipe, it is realized to the overall metal coating of optical fiber surface;While improving the controllability of optical fiber surface metal coating quality and coating thickness and uniformity.