39results about How to "Solve forming difficulties" patented technology

The invention relates to a method for extruding and molding metal powder gelatin, which belongs to the field of metal part preparation in powder metallurgic production technology. The method is characterized by comprising the steps: firstly, premixed liquid with finite concentration is prepared; then, metal powder is added into the premixed liquid to prepare a stable gelatin system; the stable gelatin system is extruded and molded to prepare a blank body; and finally, the blank body is sintered into a part. The invention breaks through the traditional molding technology and can prepare metal products with large sizes and complicated shapes. Compared with the pressure molding, the invention solves the problems of complicated shape limitation and energy consumption caused by overlarge pressure needed by molding, and greatly improves the molding condition. Compared with the injection molding and the hot pressure casting molding which need to be added with a lot of organic binding agents, the method does not need a special degreasing step, has simple technology and can greatly reduce the production cost.

The invention provides a hot-stamping die for an anticollision beam, comprising an upper die and a lower die, wherein the upper and lower dies mainly comprise combined convex / concave dies, cooling systems and a cooling seal ring. The blocks of the combined convex / concave dies avoid the corners and are staggered relatively. The cooling systems adopt drill holes, wherein the diameter of the holes is 8-30mm and the peaks of the holes are 3-10mm distant from the profiles; the two ends of the holes are sealed after hole drilling; runway type water troughs are processed near the places where the block dies are 10-50mm distant from the two end faces; the cooling water enters from one water trough and flows out of the other water trough; and seal grooves are arranged on the cooling water troughs and the cooling water troughs are provided with the seal ring and are externally connected with cooling water pipes.

The invention provides a casting-rolling method for aluminum matrix composite reinforced by in-situ generated TiB2 particles. The casting-rolling method includes the following steps: S1 putting an aluminum ingot into a crucible and keeping the temperature constant for 20-60 min after the aluminum ingot is melted into molten aluminum; S2 preparing reagents KBF4 and K2TiF6 according to the stoichiometric ratio Ti / B = 1:2 and mixing the reagents with catalysts MgF2 and AlF6Na3 evenly; S3 dispersing evenly the chemical reagents dried in the step S2 into the molten aluminum obtained in the step S1and stirring the mixture evenly to prepare a melt mixture; S4 keeping the melt mixture obtained in the step S3 at 700-900 DEG C for a total time of 40-100 min and stirring the melt mixture once every5-20 min for 1-5 min to allow the KBF4 and the K2TiF6 in the melt mixture to react with each other to generate TiB2 particles during the period; S5 removing the scum and keeping the temperature constant; and S6 conducting continuous casting-rolling for formation. According to the casting-rolling method, a fine and uniformly-distributed TiB2-particle reinforcement is obtained by utilizing the in-situ generation process, so that the defects (such as poor wettability at the interface between particles and a matrix as well as uneven distribution of particles) arising when the particle reinforced aluminum matrix composite is prepared by using the traditional external addition process are removed.

The present invention relates to a quasi pressure adjusting casting machine comprising a casting kettle, a vacuum baffle, an upper cover, a rapidly locking mechanism, a sealing taper cylinder and a right-angle sealing ring, wherein The upper cover is hinged with an upper cover hinge ear arranged at one side of the casting kettle; the middle of the rapidly locking mechanism is hinged with a locking mechanism hinge ear arranged at the other side of the casting kettle; a groove locked with the upper cover is arranged on the upper end of the rapidly locking mechanism, and a swelling force spring connected with the casting kettle is arranged at the lower end; both ends of the swelling force spring are respectively fixed on the casting kettle and the rapidly locking mechanism; the right-angle sealing ring is arranged in the vacuum baffle, and the vacuum baffle is covered at an opening at the top of the casting kettle; and the sealing taper cylinder is internally sheathed in the right-angle sealing ring. The present invention solves that aluminum alloy thin wall pieces are difficult to form and the aluminum alloy thin wall pieces always appear the problems of microshrinkage, poor tightness and suppress leakage. The present invention has the advantages of that super-thin aluminum alloy casting pieces can be produced; the strength of casting pieces can be improved about 25%; the toughness of the casting pieces can be improved to 80 % to 100%; the production rate is high; and the equipment cost is tens times as low as pressure adjusting casting equipment.

The invention discloses an inverse gravity filling forming device of a large-size complex amorphous alloy component, relates to an amorphous alloy casting device, and aims to provide equipment for ensuring the purity of a smelted alloy, overcoming gravity constraint filling casting and realizing relatively rapid solidification and cooling. The inverse gravity filling forming device comprises a smelting cabin, an induction heating system, an inverse gravity filling cabin, an inverse gravity filling riser tube, an amorphous component forming die and a computer control actuator. The smelting cabin is a sealed tank body, the induction heating system is arranged in the smelting cabin, the inverse gravity filling cabin is arranged above the induction heating system and is installed on a shell at the top of the smelting cabin in a sealed manner, the inverse gravity filling riser tube is installed at the bottom of the inverse gravity filling cabin, the amorphous component forming die is installed at the position, above the inverse gravity filling riser tube, in the inverse gravity filling cabin, and the induction heating system, the inverse gravity filling cabin, the inverse gravity filling riser tube and the amorphous component forming die all communicate with the computer control actuator. The invention belongs to the field of casting forming.

The invention relates to the technical field of improvement of the strength of aircraft or high-speed locomotive structural fastener connecting holes and specifically relates to a method for intensifying the strength of an aircraft or high-speed locomotive structural fastener connecting hole in an extruding mode, in particular to a machining method of a split sleeve. The method comprises the following steps that raw materials are selected according to specification requirements of the required stainless steel split sleeve, wherein the raw materials are hard stainless steel plates which are subjected to no heat treatment when leave a factory; and the raw materials are subjected to annealing heat treatment and then subjected to rolling depression and leveled on a roller press according to needs, the thickness is adjusted, and after calculation and blank layout are completed, the raw materials are cut into bar-shaped to-be-machined raw materials. According to the machining method of the split sleeve, heat treatment is adopted for the excessively thicker stainless steel plates subjected to no heat treatment, firstly the thickness is adjusted, then punching blanking and bending and rounding linkage forming reinforcing are performed, and the problem that high-strength stainless steel sheets are difficult to form is solved in the mode that the thickness of the stainless steel plates subjected to heat treatment is adjusted firstly, and then punching blanking and bending and rounding linkage forming reinforcing are performed.

The invention belongs to the field of a preparation technology of a roller bit in the geological prospecting and oil exploitation industry, and particularly provides a production technology of novel diamond sandwich type ultra-fine grain sintered carbide ball teeth. Artificial diamond grains can be added to the centers of the sintered carbide ball teeth, and therefore machinability and abrasive resistance of the sintered carbide ball teeth are enhanced greatly. According to the preparation technology, the technology that the surface of a cone pulley is completely covered with a sintered carbide layer through the grain melting soaking casting technique is adopted, and therefore all the ball teeth can be reinforced by the sintered carbide layer and connected into a whole. Actually, materials and the overall structure of the roller bit are changed, the stress state of each ball tooth is greatly improved, and grinding force and impact force borne by part of the ball teeth are rapidly buffered and dispersed through the sintered carbide overall shell layer. Finally, the drilling speed of the roller bit can be promoted, the service life of the roller bit is prolonged, and the roller bit can show the excellent characteristics better when used during submarine oil drilling under the harsh conditions.

The invention relates to a corrugated pipe precision hydraulic forming method and device.The method comprises the steps that the corrugated pipe precision hydraulic forming device with a forming cavity is obtained, a pipe blank is placed in the forming cavity, and the corrugated pipe precision hydraulic forming device comprises an upper sealing assembly, a plurality of mold pieces, a base plate and a lower sealing assembly; the upper sealing assembly, the multiple mold pieces and the lower sealing assembly are coaxially arranged, and the multiple mold pieces are arranged between the upper sealing assembly and the lower sealing assembly. Under the condition that the corrugated pipe precision hydraulic forming device is in the second state, the pressure control assembly controls the pressure in the pipe blank to be maintained at a second pressure value for at least 1 min, and the second pressure value is at least five times of the forming pressure value; and after forming is finished, all the mold pieces are attached, the shape and size of the corrugated pipe are stabilized through a method of maintaining pressure for a certain time, elastic resilience of the corrugated pipe is remarkably reduced, and the workload of the subsequent corrugated pipe shaping procedure is reduced.

The invention discloses a method for reducing the flow resistance of an interlayer cooling structure of a 3D printing thrust chamber. The method comprises the following steps: firstly, the interlayercooling structure of the thrust chamber is optimally designed, and then a workpiece is formed by adopting a 3D printing technology; the formed interlayer cooling structure of the thrust chamber is treated by adopting an electrochemical polishing and plasma electrolytic polishing technology; and through cooperation of the two technologies, the needed workpiece can further reach the needed performance, rough polishing is conducted through the electrochemical polishing technology, and fine polishing is conducted through the plasma electrolytic polishing technology. According to the plasma electrolytic polishing technology, the surface quality of parts can be improved by adjusting the proportion of electrolyte and the magnitude of current and voltage, initiation and expansion of a crack sourceare effectively reduced, the flow resistance of the interlayer cooling structure of the thrust chamber is effectively reduced, the service condition of the interlayer cooling structure of the thrustchamber under specific conditions is achieved, the problem of workpieces at present is solved, and the application range of the 3D printing technology and a surface modification technology in the aerospace field is widened.

The invention relates to a novel aluminum profile hot extrusion mould for a hand rail, which is mainly used for the hot extrusion of building hand rail profile. The mould comprises an upper mold (1) and a lower mold (2) which are overlaid front and rear, the feeding surface of the upper mold (1) is provided with five flow-dividing bridges (1.2), five flow-dividing holes (1.1) are formed among the five flow-dividing bridges (1.2), the middle flow-dividing hole shrinks from large to small, thus forming a large head and a small head, furthermore, the large head is arranged in the center of the feeding surface of the upper mold (1), and the hole is called a direct impact groove flow-dividing hole (1.1.1). The feeding surface of the lower mold (2) is provided with a welding chamber (2.1), the rear of which is provided with a mold cavity (2.3), and the middle of the mold cavity (2.3) is provided with a groove position (2.3.1) which is arranged directly below the large head end of the direct impact groove flow-separating hole (1.1.1). The bottom of the welding chamber (2.1) is provided with an arc-shaped flow-blocking plate (2.3) in an upward convex way along the cavity wall of the mold cavity (2.2). The mould ensures adequate feeding at the groove part of the mold cavity of the lower cavity and the uniform discharging of the extruded aluminum profile, without the problems of hand feeling and welding strips, etc.

The invention relates to an ultrahigh-strength steel laser tailor welded blank and a forming process thereof. The forming process provided by the invention comprises the following steps: carrying out the laser tailor welding on ultrahigh-strength steel and high-strength steel according to the needed shape; then, delivering the obtained welded blank to a furnace filled with a protective gas and heating to 920-940 DEG C to be continued for at least 5 minutes; fully austenitizing; transferring the austenitized welded blank to a press machine to be rapidly molded and formed; cooling to 100-150 DEG C through pressurization quenching; and cooling along room temperature to obtain the needed parts. The hot stamping process of the laser tailor welded blank provided by the invention has the double advantages of the forming and hot stamping forming of the laser tailor welded blank and simultaneously solves the problems that the ultrahigh-strength steel is difficultly applied to the production ofautomobile structural components / framework components in a laser tailor welded blank mode.

The invention relates to the technical field of manufacturing and forming, and provides a forming device and a forming method for a thin-walled annular part. The forming device structurally comprisesa fixed seat, a driving roller, a forming roller and a driving part, wherein the the driving roller and the forming roller are movably connected with the fixed seat, the forming roller is nested in aninner cavity of the driving roller, and the driving part is in driving connection with the forming roller through the driving roller; and the forming device further comprises a core roller which performs feeding motion in the radial direction of the forming roller. According to the forming device of a revolving body, the problem that a thin-walled revolving body is difficult to form is solved, the production of the thin-walled revolving body is realized, the problem of plastic instability is solved, and the limitation on the wall thickness of a thin-walled part is broken through.

The invention discloses a precise molding method for a complex internal flow passage structure. By building a precise molding device for the complex internal flow passage structure and composed of a contour casting die (1), a prefabricated three-dimensional internal flow passage structure (2) and a fusible supporting frame (3), thin-wall metal pipes with high precision and smooth internal surfacesare adopted to be precisely wound into the three-dimensional internal flow passage structure, the high-precision fusible supporting frame is used for realizing precision positioning of a three-dimensional internal flow passage, and the structural position precision of the three-dimensional internal flow passage structure can be kept in the casting process. By utilizing differences between the three-dimensional internal flow passage structure and a three-dimensional outer contour structural material in melting points, erosion and deformation of the interior of the three-dimensional internal flow passage can be avoided. According to the precise molding method for the complex internal flow passage structure, the problems that in general manufacturing methods, the functionally integrated internal flow passage structure is difficult in a complex internal flow passage molding, low in percent of pass, poor in surface precision of the internal flow passage and the like are solved.

The invention discloses a cold stamping process of a heavy-duty off-road vehicle frame reinforcing plate. The reinforcing plate is a symmetric product, the section of the product is of an L-shaped structure, the bending circular bead radius is R1, two theta-degree bends are arranged in the longitudinal direction, the bending circular bead radii are R2 and R3, the material thickness ranges from 8 mm to 12 mm, the yield strength ranges from 450 MPa to 600 MPa, and the process comprises the steps of discharging, rolling forming, bending and separating. Flexible forming is achieved, product quality is improved, the problems that forming is difficult and cracking defects exist in the circuitous process can be solved, two products are formed at a time, production efficiency is improved, a general production device is adopted, mold development cost is saved, the product development period is shortened, and the advantages of being good in product quality, low in labor intensity, high in production efficiency, capable of saving cost and shortening product development period can be achieved.

The invention discloses anti-gravity casting equipment and a casting method for a high-temperature alloy precision casting with a complex structure, and belongs to the field of alloy casting. The invention aims to solve the problem that the traditional gravity casting method cannot completely meet the requirements of the ultrathin-wall high-temperature alloy casting and the like. The system comprises a vacuum unit, a smelting system, a smelting chamber, a pouring chamber, a casting mold lifting mechanism, a control system, a transfer system and an air source system. The vacuum unit is connected with the smelting chamber and the pouring chamber. The smelting system is arranged in the smelting chamber and is used for smelting high-temperature alloy; the pouring chamber is mounted at the top of the smelting chamber; the casting mold lifting mechanism is mounted in the casting chamber; the transfer system is mounted above the pouring chamber and is used for transferring the casting mold and the riser tube; the gas source system is connected with the smelting chamber and the pouring chamber and used for filling gas into the smelting chamber and the pouring chamber in the pouring process, and the control system controls starting and stopping of the vacuum unit, the casting mold lifting mechanism, the transfer system and the gas source system. The method is mainly used for preparing the amorphous alloy forming part.

The invention belongs to the technical field of casting, and particularly relates to a method for preparing a water-soluble composite salt core based on a slurry direct-writing forming 3D printing technology. A water-soluble composite salt core material for low-melting-point alloy casting is composed of pretreated water-soluble inorganic salt, a binder and an additive, the pretreated water-soluble inorganic salt is obtained by mixing a coating solution and inorganic salt powder, and the mass percent of the coating solution and the inorganic salt powder is 100%. The ratio of the pretreated water-soluble inorganic salt to the binder to the additive is (60-80%): (20-30%): (0-10%). Compared with a traditional method for preparing a water-soluble salt core, the water-soluble composite salt core material has the advantages that the water-soluble salt core formed through slurry direct writing can be used for rapidly forming parts without a mold, the process is simple, the raw material cost is low, the equipment requirement is low, and rapid and accurate mold-free forming of high-precision complex salt cores can be achieved; the problem that complex salt cores are difficult to integrally form is solved.

The process of forming artificial joint of nanometer bioceramic relates to nanometer ceramic material forming technology, and aims at solving the problem of forming complicated shape ceramic product. The process includes the following steps: 1. hot pressing and sintering composite Al2O3 / ZrO2 powder or ZrO2 / HAP powder to prepare nanometer ceramic block; and 2. closed die forging to form ceramic product at high temperature. By means of the twice forming process, the present invention can form ceramic part of complicated shape. The present invention has the advantages of simple forming process, easy manufacture of mold, low cost, etc.

The invention discloses a roller press forming method of a low-plastic alloy ultra-large deformation thin-wall pipe. The roller press forming method comprises a main shaft, a limiting support and a power device, and further comprises a roller-wave device and a shaping device, the roller-wave device comprises a plurality of roller-wave supports and a variable-diameter mandrel, and roller-wave diessare arranged on the roller-wave supports; the shaping device comprises a plurality of shaping supports, roller flat dies, a main shaft and the roller-wave supports are arranged on the shaping supports, and the shaping supports are connected with a power device. According to the roller press forming method, the step-by-step rolling mode is adopted in the pre-forming stage of a pipe blank, so thatthe problem that a traditional roller press is difficult to form is solved, and meanwhile, the problem that a traditional roller press tube blank is pressed by multiple waves in a synchronous roller is also solved, and the problem that the transition is thinned due to the fact that materials at the trough position cannot flow into the pipe blank is solved; and in the pipe blank shaping stage, a stepping rolling mode is adopted for machining, the flowing resistance of materials in the deformation process can be reduced, and the materials at each position of the shaped pipe wall can be uniformlydistributed.

The invention relates to a method for forming parts with a tapered rubber tube, which includes the following steps: Step 1: Put the tapered tube blank on the sealing assembly with the tapered rubber tube, and put the sealing assembly with the tapered tube blank into the lower mold In the floating block of the tire, make the axis of the two ends of the conical tube blank parallel to the working table of the equipment, and the equipment drives the upper mold tire to go down, so that the floating block of the upper mold tire is in contact with the floating block on the lower mold tire ;Step 2, forming stage: the upper mold tire continues to move down to lower the axis of the two ends of the conical tube blank to the preset position and maintain the preset tonnage. There is a liquid inlet on the sealing component, and the liquid finally enters through the inlet In the tapered rubber tube; the present invention also provides a device for forming parts of the tapered rubber tube.

The invention provides a forging method for deformed short T-shaped blank, and the forging method solves the problem that forming of deformed short T-shaped blank is difficult, and relates to the technical field of forging-pressing. The forging method for the deformed short T-shaped blank comprises the following steps: a first step of placing the lower end part of rod-shaped blank into a heading lower mould cavity, placing the upper end of the rod-shaped blank into a heading upper mould cavity, pressing a heading upper mould along a heading lower mould until a bump part is formed between the upper end part of the rod-shaped blank and the lower end part of the rod-shaped blank, thereby forming first intermediate blank. The forging method solves the difficult forming problem of the deformedshort T-shaped blank. An inner metal flow line of the integrally formed deformed short T-shaped blank is good, and an aviation product processed by the inner metal flow line is good is in integral performance, so that weight of the aviation product can be relieved on the premise of meeting performance requirements, and therefore, product competitiveness is improved.

The utility model discloses integrated head punch shape uses the blank near net shape forming auxiliary, integrated head belongs to the technical field of head manufacturing, the existing technology in which at least one of integrated head manufacturing's demoulding difficulty, production cycle, material utilization rate, complex structure forming difficulty etc.

The invention discloses a stepping roll-in forming method and a device for a supramaximal deformation thin-wall pipe. The stepping roll-in forming method comprises pipe blank preforming and pipe blankshaping. The pipe blank preforming: rolling waves on the outer surface of a pipe blank to be processed in a stepping roll-in mode; and the pipe blank shaping: flattening the waves on the tube blank in the stepping roll-in mode. The pipe blank is processed in the stepping roll-in mode in the pipe blank preforming stage, so that not only the problem that the traditional roll-in forming is difficultis solved, but also the problem of transition thinning caused by the fact that materials at wave troughs cannot flow into the traditional rolling pipe blank when a plurality of waves are synchronously rolled is solved; and in the pipe blank shaping stage, the pipe blank is processed in the stepping roll-in mode, so that flow resistance of the materials in the deformation process is reduced, and the materials at each position of a shaped pipe wall is uniformly distributed.

The invention discloses a cold stamping process of a heavy-duty off-road vehicle frame reinforcing plate. The reinforcing plate is a symmetric product, the section of the product is of an L-shaped structure, the bending circular bead radius is R1, two theta-degree bends are arranged in the longitudinal direction, the bending circular bead radii are R2 and R3, the material thickness ranges from 8 mm to 12 mm, the yield strength ranges from 450 MPa to 600 MPa, and the process comprises the steps of discharging, rolling forming, bending and separating. Flexible forming is achieved, product quality is improved, the problems that forming is difficult and cracking defects exist in the circuitous process can be solved, two products are formed at a time, production efficiency is improved, a general production device is adopted, mold development cost is saved, the product development period is shortened, and the advantages of being good in product quality, low in labor intensity, high in production efficiency, capable of saving cost and shortening product development period can be achieved.

The invention provides an unequal-thickness hollow part plate forging forming die which comprises a forming male die, an outer side female die, a female die base plate, a floating mandrel and a detachable core. The invention further provides an unequal-thickness hollow part plate forging forming method which comprises the steps that firstly, one end of an original pipe blank with the outer diameter equal to the outer diameter of a target part is placed in the female die; then the male die slowly moves downwards, a part with the required small-end appearance is extruded through upsetting, and then the floating mold core is pushed upwards by the press machine to eject the part out; secondly, the other end of the part is placed on a female die base plate, a forming male die slowly descends, and ejection and demolding are conducted after reaming is completed; and thirdly, the part subjected to broaching in the last step is placed in the female die, then the male die moves downwards slowly, the inner portion of the upper end of the part is thickened, and then the part is ejected out through an ejector device below the press machine. And fourthly, the part formed in the last step is placed in the female die, the male die moves downwards slowly, the thickened part is necked towards the middle, and then the part is ejected out through an ejection device below the press.

The invention discloses a method and a device for rolling forming ultra-thin wall tubes. The device comprises a spindle, a limiting bracket, and a power device, and further comprises a roll wave device and a shaping device. The roll wave device comprises a plurality of roll wave brackets and variable diameter mandrels. Roll wave dies are arranged on the roll wave brackets. The shaping device comprises a plurality of shaping brackets, and roll flat dies are arranged on the shaping brackets. The spindle, the roll wave brackets and the shaping brackets are connected with the power device. According the method and the device, in the preforming stage of tube blanks, a stepping rolling method is adopted for machining, so that the problem of difficulties of a traditional rolling forming mode is solved, and the problem of excessive thinning of traditional rolling tube blanks caused by that materials cannot flow into wave troughs when multiple waves are rolled synchronously is solved; and in the shaping stage of the tube blanks, the stepping rolling method is adopted for machining, so that the flow resistance of the materials in the deformation process is reduced, and the situation that thematerials are evenly distributed around tube walls after shaping is ensured.

The invention relates to a method for forming parts of a conical rubber tube. The method comprises the following steps that 1, a conical pipe blank sleeves a sealing assembly of the conical rubber tube, the sealing assembly with the conical pipe blank is placed in a floating block body of a lower die tire, so that the axes of the two ends of the conical pipe blank are parallel to a working table of equipment, the equipment drives an upper die tire to move downward, so that a floating block body of the upper die tire is in contact with the floating block body of the lower die tire; and 2, forming stage is conducted, specifically, the upper die tire continues to move downward, so as to make the axes of the two ends of the conical pipe blank drop to a preset position and maintain the preset tonnage, a liquid inlet is formed in the sealing assembly, and liquid finally enters the conical rubber tube through the liquid inlet. The invention further provides a device for forming the parts of the conical rubber tube.

The invention belongs to the related technical field of component forming manufacturing, and discloses an electromagnetic gradual flexible composite forming method. The electromagnetic gradual flexible composite forming method comprises the following steps: providing an electromagnetic forming device, wherein the electromagnetic forming device comprises a discharge assembly, a multi-point supporting mould and four hydraulic cylinders, and the mould surface of the multi-point supporting mould consists of multiple discrete basic bodies; adjusting the basic bodies to form a top mould surface, and moving the hydraulic cylinders to tightly press a plate component; gradually moving a discharge coil along the top mould surface, gradually discharging the discharge assembly along with movement of the discharge coil, and gradually moving the plate component towards a direction away from the discharge coil till the plate component is fitted with the top mould surface; readjusting the heights of the basic bodies to form a new top mould surface, and reclamping the plate component; re-moving the discharge coil, and gradually discharging the discharge assembly till the plate component is fitted with the new top mould surface; repeating the steps till the plate component has a target shape. By the electromagnetic gradual flexible composite forming method, wrinkling is avoided, the thinning amount and the resilience are reduced, and uniform deformation of the plate component is achieved.

The invention was involved in producing pure tungsten with high-density ultra-fine grain at low temperature for one time. The temperature was 350-400deg.C and pressure was 5-6.5Mpa. Supersonic spray heat change was used to produce nano-WO3 powder, the diameter was lower than 40nm. Blue tungsten powder was formed in nanometer grade by deoxidation-oxidation-deoxidation reaction. Then adding furfural- phenolic aldehyde-ethyl carbinol solution, blue tungsten powder was coverd by furfural organic film after mixing by twin-screw agitator. Blue tungsten powder was deacidize in tungsten powder whose diameter was lower than 70nm in the continuous rotary furnace in fluid bed and the nano-tungsten powder was sheared and activated in dry-type high-speed interlaminar shearing machine. Tungsten powder pressed blocks were produced with high-pressure soft dies. Pure tungsten ultra-fine grain with 95%-96% relative density was produced at low temperature for one time and the tungsten crystal grain was smaller than 8-12um.